DD290843A5 - METHOD FOR CONTINUOUS PRODUCTION OF FIBER-REINFORCED PLASTIC TUBES AND DEVICE FOR CARRYING OUT THE METHOD - Google Patents

Abstract

The invention relates to a method for the continuous production of fiber reinforced plastic pipes. According to the present invention, a plastic pipe is constructed on a horizontally oriented mandrel by applying, in layers from inside, an inner release film, an inner skin, a resin-rich interlayer having a nonwoven interlining, a plurality of alternating axial and tangential reinforcing layers of resin-embedded fiber strands, a skin and an outer release film , The application of the individual layers takes place step by step, by hardening the individual layers in heating devices and then applying the next layer. The finished plastic pipe is cut into individual sections of length. The invention further comprises a device for carrying out the method according to the invention, which comprises the necessary work stations, such as the mandrel for the production of the tube, feeding and shaping devices, heating devices, ring doctor blades, pulling and separating devices, arranged on a common base frame. Fig. 1 {fiber-reinforced plastic pipe; Mandrel; Release film; Inner skin; Synthetic resin; Non-woven fabric; Verstaerkungsschicht; Fiber strand; Feeding and forming devices; Erwaermungsvorrichtungen; Ring doctor blades; Separating device}

Description

For this 11 pages drawings

Field of application of the invention

The invention relates to a method for the continuous production of fiber-reinforced plastic pipes and a device for carrying out the method according to the invention.

Characteristic of the known state of the art

For the production of fiber-reinforced plastic / tubes, there are various methods in practice. In one of these methods, a release agent is applied to a rotating mandrel. Then a support layer is applied, which is often referred to as a resin-rich layer. This is sometimes a binder-free, d. H. non-resin impregnated scrim from a random fiber fleece wound and then soaked with a synthetic resin. More often, a bonded with binders scrim is applied, namely either a resin-bonded nonwoven or a mat strip of glass fiber short fibers, which are bound together by means of a binder, or a sprayed layer of a mixture of glass fiber short fibers and a binder resin. The sprayed-on support layer is usually compressed mechanically and thereby vented. The dry nonwoven as well as the bonded nonwoven and the mat strip can also be passed through an impregnating bath beforehand and thereby be impregnated with an impregnating resin and then wound up onto the separating means on the rotating winding mandrel. Sometimes the impregnating resin is also applied directly to the separating layer and wound up first the fleece or the mat strip and at the same time embedded in the impregnating resin.

One or more reinforcing layers are applied to a support layer made thereon. Such a reinforcing layer in turn consists of a band-shaped or s'crangförmigen scrim and an impregnating resin. Again, different embodiments are possible in the context, namely a glass-silk fabric tape or a so-called unidirectional fabric tape, in which a number of parallel adjacent threads or fibers are mechanically held in band form by transverse threads or holding threads at certain larger distances, or a fiber strand so-called roving, in which the fibers are band-shaped next to each other. The application of the impregnating resin for the reinforcing layer is done either by the fabric belt or the fiber strand are passed through the impregnation and thereby impregnated, or in that the impregnating resin is at least partially applied previously on the support layer and there! = Fabric tape or Fiber strand is subsequently embedded. In the formation of the reinforcing layer, the fabric tape or the fiber strand can be applied in one or more layers. In multilayer application, the fabric band or the fiber strand are applied to the pipe section by one or more repetitive longitudinal movements of a support, sometimes at the ends of the tube each have a pin ring is arranged around the pins around the belt or the fiber strand. This creates a kind Diagonalgelege.

Sometimes, a cover layer which may contain a nonwoven and which in any case consists of a resin layer which serves to form a smoother outer surface of the fiber-reinforced plastic tube, is applied to this reinforcing layer. The impregnating resins are cured by chemical reactions, which are usually triggered by the action of heat and thereby solidifies the tubular layer structure to the tube. Only after this solidification, the tube can be removed from the mandrel. Thereafter, the end portions are usually separated at both ends, in which the fabric or the fiber strand ends either uneven or, in multi-layer reinforcing layer, the fabric tape or the fiber strand has reversal points. These severed end portions represent an unusable waste.

One of the disadvantages of this method is that it works discontinuously. Because of the discontinuous operation, the production is very time consuming. In the case of multi-layer reinforcement, the support must be stopped at the reversal points and accelerated again in the reverse direction of movement. This means additional time. Of even greater disadvantage is that the winding speed and thus the feed rate for the fiber fabric or the fiber strand is subject to fluctuations, which adversely affect the context itself and especially on the resin impregnation.

The resulting on the winding mandrel piece of pipe sits very firmly on the winding mandrel. Of which it must be laboriously deducted using very high forces.

If such a pipe, in particular the backing layer, is not adequately vented, leaving Pτβη in the backing layer, such a pipe tends to "swirl." A medium under pressure inside the pipe

occurs in more or less large amount through the pipe wall to the outside, where it appears like drops of sweat in appearance.

Such wound tubes have a more or less wavy, especially in the circumferential direction, d. H. uneven Outside. Such a pipe is not calibrated on the outside. It has more or less large tolerances in the wall thickness and

accordingly, larger tolerances in the outer diameter.

In such a tube, the scrim or pad of the webbing or fiber strand is under a larger one Slope angle aligned with respect to a normal plane to the longitudinal axis of the tube. This is the strength of the Insole as such not fully in the strength of the pipe wall. Therefore, such pipes must be proportionate

be made thick-walled in order to achieve a certain compressive strength at all. The relatively large wall thickness results in a correspondingly high weight per meter of pipe.

The "Übdrkreuzlage" of the insert also has the consequence that the temperature inherent in the resin

relatively large thermal expansion of the deposit can be absorbed only insufficient. Such pipes themselves have a relatively large thermal expansion, which is very disturbing especially in the longitudinal direction. Therefore, such pipes are usually not suitable for pipes in which the medium often changes in temperature or even erratic

Temperaturwechsei occur. In the method described above, the fabric tapes or fiber strands in multilayer application in

generally applied in each case with the same pitch angles in both winding directions. There is also another

Winding method in which different winding angles are used (dual angle winding). On a standing thorn

a release film is applied, in helical form with a very high pitch angle. The edges of the foil helix overlap one another. Onto the release film, a resin-impregnated nonwoven in ribbon form is wound up at a high pitch angle. This fleece is applied with a certain tension on the release film. This resin impregnated nonwoven forms the support layer for the plastic pipe. On the support layer, a resin-impregnated cloth tape of a certain width is wound, which is smaller than the outer circumference of the support layer. The fabric tape is wound on the support layer with a very large pitch angle, so that due to the approximate ax.elen alignment of the warp threads of the

This first reinforcing layer is compacted by rollers. On the first reinforcing layer, a resin-bonded fabric tape of a width is wound, which is considerably smaller than

the width of the first fabric tape is. It is wound at a much lower pitch than the first reinforcing layer, with the band helix butting against each other at their edges. The slope of the warp threads of the

Fabric tape of the second reinforcing layer is generally between 45 ° and 30 °, so that this Reinforcing layer may be called "quasi tangential." The pitch of the warp threads of the fabric tape of the second Reinforcing layer is oriented in the opposite direction to the slope of the '' attfäden the first reinforcing layer. The second Reinforcing layer is also compacted by rollers. Then a third resin-impregnated fabric tape is wound up,

and again with a smaller pitch with a pitch angle between 45 ° and 30 °, so that a second "quasi-tangential" reinforcing layer is formed, whose pitch is opposite to that of the second

Reinforcing layer. This third reinforcing layer is also compacted by means of rollers. The release film, the nonwoven for the backing layer and the resin impregnated fabric tapes for all three reinforcing layers

applied by rotors that revolve around the tube axis. On the rotors, the respective belts are wound on supply rolls. As a result, this winding process works continuously.

The fiber-reinforced plastic pipes produced by this process have a number of disadvantages. The belt helix of the three reinforcing layers are loosely next to each other and abut each other only with the edges

on. They do not overlap each other because they are too big in thickness. Overlapping would result in spiraling beads. Because the belt helix are only adjacent to each other, the strength of each reinforcing layer transverse to its pitch is very low, because at most they are interconnected via their impregnating resin.

The fabric tapes used in this winding process have due to the tissue formation a total thickness, the

is approximately equal to the sum of the thickness of their warp threads and their wefts. This circumstance has the consequence that the

Tissue bands within the imaginary planes enveloping them have relatively large cavities, which are of the Tränkharz be filled. The tubes thus produced therefore have a relatively large proportion of resin. you are

Therefore also relatively thick-walled and heavy.

The fabric tapes used in this process are relatively expensive to manufacture. You have only one

limited length. The fabric tapes must therefore be changed frequently in the continuous pipe production by the start of the new fabric tape at the end of the preceding fabric tape is set as close as possible.

This is always preceded by difficulties. Also in this method, the resin-impregnated fabric tapes inherently strength in the pipe can only

be exploited partly because the warp threads of the first reinforcing layer are aligned only quasi axially and in

Reality still have a noticeable slope angle, and because the warp threads of the second and the third Reinforcement layer in turn are aligned only quasi tangential and their slope of the zero slope of the pure

tangential orientation is still relatively far away.

Due to the quasi-axial alignment of the warp thread of the first reinforcing layer and the only quasi

tangential alignment of the warp threads of the second and third reinforcing layers, each with larger deviations of their

As compared to the ideal direction, these tubes have a relatively large thermal expansion coefficient, too

if this is lower than the pure resin.

The outside of these tubes is not smooth. Their wall thickness and also their outer diameter have relatively large Tolerances. For both reasons, these pipes can not be interconnected by means of purely metallic fitting systems

or a.i fittings are connected. Also, fitting systems with a round cord as an elastic sealing element can not be used because of the unevenness of the outside of these tubes. They do not provide sufficient tightness. These tubes can therefore only be joined together by means of adhesive sleeves, which in turn dnr uneven outside and because of the large diameter tolerances, the spigot to a so-called

Pointed conical sharpened while it must be smoothed at the same time. This requirement is particularly applicable to construction sites of

big disadvantage.

Object of the invention

The aim of the invention is to provide an improved process for the production of fiber-reinforced plastic pipes, in which the disadvantages of the known methods do not occur.

Explanation of the essence of the invention

The invention has for its object to provide a method by which fiber-reinforced plastic pipes can be produced continuously, which have better strength properties than the tubes produced by the conventional method, which have the same pressure resistance a smaller wall thickness and therefore a lower weight per meter and the one have smoother and more uniform outside. The invention is also based on the object of specifying a device by means of which this method can be carried out

 The method according to the invention is characterized by the following method steps:

- On a horizontal mandrel, which is held in its initial region by a holding device and is arranged from there flying, a band-shaped release film in the longitudinal direction of the mandrel is continuously drawn onto this and thereby formed into a mandrel enclosing the separating tube, wherein the edges the release film are impermeable to each other,

the separation tube is continuously moved in the pulling direction of the plastic tube through all subsequent processing stations,

- On the separation tube, a liquid resin is poured and formed by means of an annular doctor blade (ring doctor) to an annular uniformly thick synthetic resin layer,

this synthetic resin layer is gelled to form an inner skin of the plastic tube by the action of heat,

- On the inner skin, a liquid synthetic resin is poured and embedded in the forming resin layer, a band-shaped web without gaps, thus forming a support layer,

- On the support layer, a liquid resin is poured, from which forms a synthetic resin layer,

- From a Regalgatter a larger number of fibers are withdrawn in the form of multiple fiber strands, fed to a radial distance around the mandrel arranged guide device, fed from this in the form of a closed truncated cone fiber cladding of a mandrel surrounding the mandrel and from this to form an axial Reinforcing layer embedded in the synthetic resin layer,

- On the axial reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer,

- Of a circulating around the mandrel in a certain direction of rotation annular coil carrier having at least one coil with a number of fibers in the form of a fiber strand, is deducted from the coil or from the coils of the fiber strand, wound on the first reinforcing layer tangentially with the smallest possible pitch angle and thereby embedded in the synthetic resin layer to form a tangential reinforcing layer, wherein at the same time the fibers of the underlying axial reinforcing layer are compressed towards the mandrel,

- On the tangential reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer,

- From a Regalgatter a larger number of fibers are withdrawn in the form of multiple fiber strands, fed to a radial distance around the mandrel arranged guide device, fed from this in the form of a closed truncated cone fiber cladding of a mandrel surrounding the mandrel and from this to form another axial reinforcing layer embedded in the synthetic resin layer,

- On the axial reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer,

- From one around the mandrel in the opposite direction of rotation to the previous coil carrier circulating corona-shaped further coil carrier having at least one coil with a number of fibers in the form of a fiber strand, is deducted from the coil or from the coils of the fiber strand, tangentially to the axial reinforcing layer rolled as small as possible pitch angle and thereby embedded to form a further tangential reinforcing layer in the resin layer, wherein at the same time the fibers of the underlying axial reinforcing layer are compressed towards the mandrel,

böi requirement is formed on this tangential reinforcing layer depending on a further axial reinforcing layer and a further tangential reinforcing layer, wherein the direction of rotation of the reel support used in this case is inverse to that of the preceding bobbin,

after the last tangential reinforcing layer an existing excess of resin is stripped off by means of an annular doctor blade,

- On the outer reinforcing layer, a liquid resin is poured and formed by means of a squeegee to a uniformly thick outer skin of the plastic tube,

- On the outer skin, a band-shaped release film in the longitudinal direction of the mandrel is placed continuously by means of a guiding and shaping device and thereby formed into a separating tube enveloping the outer skin,

the plastic pipe thus formed is passed through a hardening device in which hardening of the synthetic resin layers is initiated and at least partly completed by the action of heat and / or by the action of light,

- Within the hardening device, the plastic pipe is removed from the mandrel ending there,

- After the hardening device, the finished plastic pipe is divided by means of a separator into individual lengths with a certain length. >

So that according to the invention on the separation tube first an inner skin is built and this is made to gel, so that it has a certain compressive strength, and that only the support layer is applied to the nonwoven insert, the later plastic tube receives an innermost layer, the free of Tissue or fiber inserts is, so no pores are to be feared. The permeability of the tube for a later to be passed through it medium is thus reduced to the greatest extent possible, if not eliminated. Characterized in that the synthetic resin layer for the inner skin was brought to gel before applying the support layer, is prevented in the following process steps by the application of the reinforcing layers, the support layer, in particular their fleece insert, is pressed into the inner skin and reduces their impermeability. This is further supported by the use of a non-woven fabric for the backing layer. So that the fibers for the first reinforcing layer initially fed in the form of multiple fiber strands of the guide

be and are supplied from this in the form of a closed truncated cone-shaped fiber cladding of the mandrel surrounding the annular blade and are embedded by this in the previously cast resin layer, one obtains a precisely axially aligned fiber profile in the first reinforcing layer. The fact that these fibers are embedded from the outside into the previously applied synthetic resin layer and not a Kunstharzgetränktes fabric tape is wound, the risk of air bubbles and a corresponding porosity of the reinforcing layer is virtually equal to zero. Thus, for the second reinforcing layer of the bobbin, a narrow fiber strand is wound onto the mandrel and not about a much wider fabric tape, the orientation of the fibers of the second reinforcing layer comes close to the ideal case of purely tangential orientation. This is further supported by the fact that you will work to avoid imbalances on the bobbin in practice with at least two coils and therefore can reduce the number of fibers of each of the two fiber strands in half. In addition, these fiber strands can be wound so that they at least partially overlap each other and thus enters a further approach to the ideal case. The fact that the fibers of the second reinforcing layer are embedded from the outside in the previously applied synthetic resin layer, in turn, the embedding of air bubbles is virtually eliminated. In addition, the friction that already occurs on the fiber strand guide elements causes the fiber strand to be wound up with a certain base tension, compressing the axially aligned fibers of the underlying axial reinforcing layer toward the mandrel. As a result, excess resin of the first reinforcing layer is displaced to the outside, so that the resin content of the axial reinforcing layer, but also the tangential reinforcing layer, is reduced to a minimum. This reduces the wall thickness of these two reinforcing layers and, accordingly, also reduces their share of the weight of the finished plastic tube. By compacting the two reinforcing layers and squeezing out the excess synthetic resin, the last air bubbles are also displaced from the area of the reinforcing layers which, if any, should have been embedded in the synthetic resin layer when embedding the fibers. So that the tangential reinforcing layer again followed by an axial reinforcing layer whose axially extending fibers have been embedded by the ring doctor in the previously applied resin layer or in the remaining existing by the compression of the underlying reinforcing layers excess of resin and thereby also be compressed, also the underlying tangential reinforcement layer additionally compressed, especially in the region of its outer fibers. This, in turn, also applies to the second axial reinforcing layer, when a tangential reinforcing layer is subsequently applied again. Characterized in that the fibers are wound in the opposite direction of rotation of the bobbin in the opposite sense as in the first tangential reinforcing layer, the inevitable, but very small deviation of the orientation of the fibers is compensated by the purely tangential orientation, especially since the two tangential reinforcing layers due to successive compression operations are very close to each other. In order that, if necessary, in the same way, yet another axial reinforcing layer and another tangential reinforcing layer can be applied and can even be continued, the later plastic pipe can be built to the widest extent possible to cope with higher and highest demands in terms of its mechanical behavior become. Thus, that on the outermost reinforcing layer, which is expediently a tangential reinforcing layer, an outer skin is applied, the later tube can also be connected or connected with such metal fitting systems that improve the tightness of the joint with ring edges, ring cutting, and annular beads the like act on the outside of the plastic tube, without causing the risk that the fibers of the outer reinforcing layers are damaged or destroyed by these fitting parts. In addition, an even smoother surface of the Kur.ststoffrohres is achieved with this outer skin than it alone is already achieved by the tissue node-free alone formed by parallel-lying fibers outermost reinforcing layer. Thus, that applied to the outer skin of a band-shaped release film and shaped to a skin surrounding the skin separating tube wild, it is possible to pass the plastic tube through a calibration device, which in addition to the calibration of the squeegee for the outer skin a re-calibration is possible before the layer structure the plastic tube in the hardening device is hardened and then the finished plastic tube is formed. The fact that the mandrel ends within the hardening device and the plastic pipe is moved freely from there without him, it is avoided that the frictional force between the hardening and thereby solidifying plastic tube is too large and then it could be moved on the mandrel only with difficulty , So that the continuously manufactured plastic pipe is divided by the separator into individual lengths of a certain length, the plastic pipe can be handled both during transport as well as in the manufacture of a pipe easier.

According to the invention, the nonwoven for the backing layer is withdrawn either in the form of a ribbon from a spool, or preferably in the form of two or more ribbons, from the corresponding number of spools disposed on a donut-shaped spool carrier revolving around the mandrel the inner skin is wound up completely and without overlapping, and thereby embedded in the second synthetic resin layer formed on the inner surface.

In this embodiment of the erfindungsge. In the case of the production of the support layer, the strip-shaped nonwoven used for this purpose can also be processed with different widths by simply matching the speed of the coil carrier and the pulling speed of the synthetic stiffening tube, taking into account the bandwidth. According to the invention, the nonwoven fabric for the SiüliSchicht in the form of a strip whose width is at least approximately equal to the circumference of the support layer, withdrawn from a coil which is disposed above the mandrel, and introduced by means of a guiding and shaping device to the mandrel on all sides and thereby embedded in the second synthetic resin layer. In this embodiment of the method according to the invention, the band-shaped nonwoven fabric is fed to the mandrel in axial alignment without the occurrence of an entangling force, so that the risk of penetration of the nonwoven fabric into the underlying gelled inner skin is further reduced. This can better absorb fluctuations in the gelling speed of the synthetic resin for the inner skin.

In another embodiment of the method according to the invention, the nonwoven for the support layer in the form of two bands whose total width is at least approximately equal to the circumference of the support layer, deducted by a respective coil which are arranged on both sides of the dome diametrically to this, and by means of a Leit - And molding device brought to the mandrel on all sides and thereby embedded in the resin layer.

This procedure makes it possible to cast the synthetic resin for the supporting layer in the back region of the mandrel only then and only at the point at which the two nonwoven tapes are at least already approximated to the mandrel from the side. It can the

Guiding and shaping device for the two nonwoven tapes are also used to assist the formation of the resin layer of the cast resin, while also ensuring a uniform distribution of the resin. After a variation of the method according to the invention, the following method steps are carried out:

the synthetic resin cast on the inner skin for the backing layer is infused with an excess exceeding the minimum quantity for the backing layer, sufficient to form the synthetic resin layer at least for the first axial reinforcing layer, preferably at the same time for the first tangential reinforcing layer,

the nonwoven for the support layer is embedded in this synthetic resin layer in such a way that the excess amount of the synthetic resin exceeding the receiving volume of the nonwoven leaves out through the nonwoven,

the fiber strands for the axial reinforcing layer brought to the mandrel via the first guide ring are embedded by the relevant annular doctor blade in the synthetic resin layer formed by the excess quantity, in order to form the axial reinforcing layer,

- In the event that the excess amount is sufficient for the second reinforcing layer, the withdrawn from the first bobbin fiber tangentially for the tangential reinforcing layer to the axial reinforcing layer are wound tangentially and thereby embedded in the excess amount.

With this procedure, the number of resin feeding devices can be at least three and at least three

be reduced to one and thus simplify and shorten the process.

According to a further variant of the method according to the invention can also on the basis of a plastic inner tube a

fiber reinforced plastic pipe with the above-described properties are produced.

The following process steps are performed for this:

- A plastic inner tube is fed by means of a feeder in a horizontal orientation concentric to the subsequent processing stations and moved steadily in the pulling direction of the tube,

- On the plastic inner tube, a liquid adhesive resin is poured for an adhesive and buffer layer and formed by means of an annular doctor blade (ring doctor) to an annular uniformly thick adhesive resin Schichc,

- In this adhesive resin layer, a band-shaped nonwoven fabric (random fiber fleece) is embedded without gaps to form the adhesive and buffer layer,

on the adhesive and buffer layer, a liquid synthetic resin is poured, from which a synthetic resin layer is formed,

- From a Regalgatter a larger number of fibers are withdrawn in the form of multiple fiber strands, fed to a radial distance around the mandrel arranged guide device, fed from this in the form of a closed frusto-conical fiber cladding of a mandrel surrounding the mandrel and of these zum Forming an axial reinforcing layer embedded in the resin layer,

- On the axial reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer,

- Of a circulating around the mandrel in a certain direction of rotation annular coil carrier having at least one coil with a number of fibers in the form of a fiber strand, is deducted from the coil or from the coils of the fiber strand, wound on the first reinforcing layer tangentially with the smallest possible pitch angle and thereby embedded in the synthetic resin layer to form a tangential reinforcing layer, wherein at the same time the fibers of the underlying axial reinforcing layer are compressed towards the mandrel,

- On the tangential reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer,

- From a Regalgattir a larger number of fibers are withdrawn in the form of several fiber strands, fed to a radially spaced around the Dor.i around guide device, fed from this in the form of a closed frusto-conical fiber jacket of a mandrel surrounding the mandrel and from this to form another axial reinforcing layer embedded in the synthetic resin layer,

- On the axial reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer,

- From one around the mandrel in the opposite direction of rotation to the previous coil carrier circulating corona-shaped further coil carrier having at least one coil with a number of fibers in the form of a fiber strand, is deducted from the coil or from the coils of the fiber strand, tangentially to the axial reinforcing layer rolled as small as possible pitch angle and thereby embedded to form a further tangential reinforcing layer in the resin layer, wherein at the same time the fibers of the underlying axial reinforcing layer are compressed towards the mandrel,

if necessary, a further axial reinforcing layer and a further tangential reinforcing layer are formed on this tangential reinforcing layer, the direction of rotation of the reel support used being in the opposite direction to that of the preceding coil carrier,

after the last tangential precoating layer, an existing excess of resin is stripped off by means of an annular doctor blade,

- On the outermost reinforcing layer, a liquid synthetic resin is poured and formed by means of a squeegee to diner uniformly thick outer skin of the plastic tube,

- On the outer skin, a band-shaped release film in the longitudinal direction of the mandrel is placed continuously by means of a guiding and shaping device and thereby formed into a separating tube enveloping the outer skin,

the plastic pipe thus formed is passed through a hardening device in which hardening of the synthetic resin layers is initiated and at least partly completed by the action of heat and / or by the action of light,

within the hardness device, the plastic tube is pulled off the mandrel ending there,

- After the hardening device, the finished plastic pipe is divided by means of a separator into individual lengths with a certain length.

This makes it possible to produce fiber-reinforced plastic pipes whose inner walls have physical and / or chemical properties which possibly can not be achieved in a plastic pipe having an inner skin of a gellable liquid synthetic resin. The t'eiche applies to the production of plastic pipes based on a plastic inner tube, which is already provided with an adhesive layer, which was already applied during the production of this plastic inner tube or subsequently

 For the production of such plastic pipes, the following process steps are to be carried out:

- A plastic inner tube, which is provided with an adhesive layer, which is formed by a fabric or mat strip, which was embedded by heat treatment of the outside of the plastic inner tube in this is fed by means of a feeder in a horizontal orientation concentric to the subsequent processing stations and in the Pulling direction of the tube continuously moved,

on the adhesive layer, a liquid synthetic resin is poured, from which a synthetic resin layer is formed,

- From a Regalgatter a larger number of fibers are withdrawn in the form of multiple fiber strands, fed to a radial distance around the mandrel arranged guide device, fed from this in the form of a closed truncated cone fiber cladding of a mandrel surrounding the mandrel and from this to form an axial Reinforcing layer embedded in the synthetic resin layer,

- On the axial reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer,

- Of a circulating around the mandrel in a certain direction of rotation annular coil carrier having at least one coil with a number of fibers in the form of a fiber strand, is deducted from the coil or from the coils of the fiber strand, wound on the first reinforcing layer tangentially with the smallest possible pitch angle and thereby embedded in the synthetic resin layer to form a tangential reinforcement layer, at the same time compressing the fibers of the underlying axial reinforcement layer to the mandrel,

- On the tangential reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer,

- From a Regalgatter a larger number of fibers are withdrawn in the form of multiple fiber strands, fed to a radial distance around the mandrel arranged guide device, fed from this in the form of a closed truncated cone fiber cladding of a mandrel surrounding the mandrel and from this to form another axial reinforcing layer embedded in the synthetic resin layer,

- On the axial reinforcing layer, a liquid resin is poured, ags which forms a synthetic resin layer,

- From one around the mandrel in the opposite direction of rotation to the previous coil carrier circulating corona-shaped further coil carrier having at least one coil with a number of fibers in the form of a fiber strand, is deducted from the coil or from the coils of the fiber strand, tangentially to the axial reinforcing layer wound as small as possible lead angle and thereby embedded to form a further tangential reinforcing layer in the resin layer, wherein at the same time the fibers of the underlying axial reinforcing layer are compressed towards the mandrel,

if necessary, a further axial reinforcing layer is formed on this tangential reinforcing layer, the direction of rotation of the reel support used being in the opposite direction to that of the preceding reel carrier,

after the last tangential reinforcing layer an existing excess of resin is stripped off by means of an annular doctor blade,

- On the outermost reinforcing layer, a liquid synthetic resin is poured and formed by means of a squeegee to a uniformly thick outer skin of the plastic tube,

- On the outer skin, a band-shaped release film in the longitudinal direction of the mandrel is placed continuously by means of a guiding and shaping device and thereby formed into a separating tube enveloping the outer skin,

the plastic pipe thus formed is passed through a hardening device in which hardening of the synthetic resin layers is initiated and at least partly completed by the action of heat and / or by the action of light,

- Within the hardening device, the plastic pipe is removed from the mandrel ending there,

- After the hardening device, the finished plastic pipe is divided by means of a separator into individual lengths with a certain length.

With an embodiment of the three methods for producing fiber-reinforced plastic pipes, a part of the supply devices for the synthetic resin can also be saved in the production of the reinforcing layers starting from the third reinforcing layer and also there simplify and accelerate the process

 For this the following process steps are necessary:

for an axial reinforcing layer not immediately preceded by a supporting layer, the synthetic resin is poured with an excess in excess of the minimum amount for the axial reinforcing layer, sufficient to thereby also form the synthetic resin layer for the immediately following tangential reinforcing layer,

the fiber strands for the axial reinforcement layer brought to the mandrel via the second guide ring are embedded by the relevant annular doctor blade in the previously formed synthetic resin layer so that the excess amount exceeding the receiving volume of the fiber strands for the axial reinforcing layer exits through the fibers to the outside .

- The deducted from the second bobbin fiber strands for the tangential reinforcing layer are wound tangentially to the axial reinforcing layer and thereby embedded in the excess amount.

The invention further relates to a device on which the inventive method for continuous production

made of fiber-reinforced plastic pipes with particularly good results. It is characterized by the following features:

There is a Regalgatter available that a number of coils with fiber strands of glass fibers, carbon fibers or textile fibers

having.

On Regalgatter are guiding devices for removing the fiber strands of the coils and for forwarding the fiber strand »

available,

- there is a base frame for the joint reception of several workstations uric devices,

a holding device for a mandrel is arranged in the initial region of the base frame, by means of which the mandrel is fixedly connected in its initial region to the base frame,

- The mandrel is formed as an elongated cylindrical hollow body,

there is a unwinding device for a band-shaped release film wound on coils,

- There is a guide device for the release film, by means of which the voi of the unwinding peeled release film in the axial direction can be fed to the mandrel,

in the initial region of the mandrel, a shaping device is arranged, by means of which the release film produced by the guide device can be shaped around the mandrel into a separating tube,

a connecting device is provided by means of which the edges of the separation film formed for the separating tube for synthetic resin are impermeable to one another,

there is a supply device for a synthetic resin, by means of which a synthetic resin in the back region of the mandrel can be puffed onto the separating tube from a storage container,

- There is an annular doctor blade (ring doctor), which surrounds the mandrel outside and has a certain clear width,

- Below the ring doctor a collecting tray for the stripped amount of resin is arranged,

Following the ring doctor, a heating device is provided which externally surrounds the mandrel and by means of which the synthetic resin layer present on the separating tube is gellable to an inner skin of the plastic pipe, there is a supply device for a synthetic resin, by means of which a synthetic resin from a reservoir in the back region of the dome is pourable onto the inner skin,

there is a take-off device for a bobbin wound in the form of a random fiber fleece, there is a guiding and shaping device, by means of which the fleece from the unwinding device to the mandrel is hindurchleitbar and is moldable to a longitudinally open tube, the outside of the mandrel surrounds, there is a ring doctor, by means of which the cast resin is moldable into a uniformly thick synthetic resin layer and by means of which at the same time the tube formed by the web for forming a support layer in the resin layer is embeddable

there is a supply device for a synthetic resin, by means of which a synthetic resin in the back region of the mandrel can be poured from a storage container,

there is a guiding and shaping device which surrounds the mandrel on the outside and by means of which the fibers of a number of fiber staples derived from the racking gate can be passed to the mandrel in the form of a closed truncated cone-shaped fiber casing,

There is a ring doctor present, by means of which the cast resin is malleable to a uniformly thick synthetic resin layer and by means of the same time the Fasermantt! for embedding an axial reinforcing layer into the synthetic resin layer,

there is a supply device for a synthetic resin, by means of which a synthetic resin in the back region of the mandrel can be poured from a storage container,

there is a ring-shaped coil carrier which surrounds the mandrel in the middle and which is rotatably mounted on a storage rack,

at the bobbin at least one coil of a fiber strand is rotatably mounted, the bobbin is coupled to a drive with adjustable speed, on the bobbin guide means are arranged, by means of the fiber strand from any existing coil to the mandrel hinleitbar and the circulation of the bobbin to form a tangential Reinforcing layer can be embedded in the synthetic resin layer,

there is a supply device for a synthetic resin, by means of which a synthetic resin in the back region of the mandrel can be poured from a storage container,

it is a guiding and shaping device which surrounds the mandrel on the outside and by means of which the fibers of a number of fiber strands derived from the racking gate can be led to the mandrel in the form of a closed dome-shaped fiber jacket,

an annular doctor blade is provided by means of which the cast-on synthetic resin can be shaped into a uniformly thick synthetic resin layer and by means of which at the same time the fiber jacket can be embedded in the synthetic resin layer to form a further axial reinforcing layer,

there is a supply device for a synthetic resin, by means of which a synthetic resin in the back region of the mandrel can be poured from a storage container,

there is a ring-shaped coil carrier which surrounds the mandrel in the middle and which is rotatably mounted on a storage rack,

at least one bobbin of a fiber strand is rotatably mounted on the bobbin, the bobbin is coupled to an adjustable speed drive whose direction of rotation is opposite to that of the preceding bobbin,

On the bobbin guide means are arranged, by means of which the fiber strand of any existing coil is leadable to the mandrel and the circulation of the bobbin for forming a further tangential reinforcing layer in the resin layer can be embedded, if necessary, are still available, depending

A supply device for a liquid synthetic resin,

A guiding and shaping device for guiding fiber strands and for passing their fibers in the form of a frustoconical fiber sheath towards the mandrel,

An annular doctor blade for molding the synthetic resin layer and for embedding the fiber jacket in the synthetic resin layer to form another axial reinforcing layer;

• a supply device for liquid synthetic resin and

A coil carrier for forming a further tangential reinforcing layer, the direction of rotation of this coil carrier being opposite to the direction of rotation of the preceding coil carrier.

following the last bobbin to form a tangential reinforcing layer, an annular doctor blade is arranged,

by means of which an existing excess of synthetic resin can be stripped off,

There is a supply device for a synthetic resin, by means of which from a reservoir, a synthetic resin for a

Outer skin of the plastic tube in the Rückenbei eich the mandrel is pourable,

there is a squeegee, by means of which the cast-resin is malleable to form an outer skin of the plastic tube to a uniformly thick synthetic resin layer,

ρ? If there is a unwinding device for a band-shaped, wound on coils release film, there is a guiding and shaping device, by means of which the release film from the unwinding device to the mandrel is leittraururformd to a longitudinally open hose which surrounds the outer skin, wherein the Abut edges of the release film in the area of the underside of the mandrel bluntly,

Following the guiding and shaping device for the separation tube, a hardening device is arranged, which is the

Plastic pipe surrounds outside,

the hardening device has heat sources and / or radiation sources arranged around the plastic pipe

the hardening device has a guide tube for the plastic tube, whose inside diameter is at least approximately equal to the

Sum of the nominal diameter of the plastic tube and the two-wall thickness of the separation tube is the Wall at least in sections and / or by area for those of the heat sources and / or radiation sources

heat or radiation is permeable and that extends in the pulling direction beyond the hardening device, wherein its »longitudinal extent is dimensioned so that it surrounds the plastic pipe at least to that point of its movement path, abder the outer skin of the plastic pipe sufficient dimensional stability for the Supporting the plastic pipe has on support rollers,

the mandrel ends at least approximately at the rear end of the hardening device,

to the hardening device includes a curing line having heat-insulating means surrounding the plastic pipe on the outside,

- Following the curing line a traction device is arranged, by means of which the plastic pipe is movable by friction in the pulling direction,

- Between the rear end of the guide tube of the curing device and the Zugvorrichtun j support roller η are arranged, which are adjustable to the vertical position of the underside of the plastic tube and carry the plastic tube to the pulling device,

- Following the pulling device, a separating device is present, which is movable by means of a guide in the direction of movement of the plastic tube and by means of the plastic tube in individual lengths with a certain length measure is divisible,

the separating device has a clamping device by means of which it can be clamped to the plastic tube during a separating process,

- The separator v / eist a return device by means of the separation device after completion of a separation process is moved back to its original position.

Furthermore, the connecting device for the release film on an unwinding device for an adhesive tape.

In the peripheral region of the edges of the release film, a pressure roller is resiliently arranged, by means of which the adhesive tape produced by the unwinding device can be pressed against the edges of the release film.

The connecting device is designed as an ultrasonic welding device, by means of which the overlapping edges of the separating film can be directly connected to each other.

In a particular embodiment of the device according to the invention, the annular blade for the synthetic resin layer for forming an inner skin is arranged on a guide device by means of which the annular blade is guided immovably in the longitudinal direction of the mandrel and movable in the normal plane to the longitudinal axis of the mandrel,

- The guide device has at least one guide roller, Favor edoch two guide rollers, which are supported on the separation tube on dom mandrel and the running level rumindes -. <passing through the longitudinal axis of the mandrel, wherein they enclose an angle between 60 ° and 120 °, preferably an angle of 90 °,

- The guide rollers are arranged in a longitudinal portion of the mandrel, which is located in the pulling direction of the plastic tube in front of the mouth of the feeder for the resin for the inner skin.

With this embodiment of the device is achieved that the annular blade for forming the inner skin is always exactly centered on the mandrel and that it follows all transverse movements of the mandrel, which makes this due to its elasticity under the action of lateral forces when winding the fiber strands for the tangential reinforcing layers may be applied to it. Thereby, a very high uniformity of the wall thickness of the inner skin and thus at the same time a very accurate centering of the outer side of the inner skin is achieved with respect to the outside of the mandrel, which also entails a very high uniformity of the wall thickness of the subsequent layers of the plastic pipe.

With a special embodiment of the device according to the invention, the method can be carried out very cheaply with a plastic inner tube.

In this case, the device according to the invention is equipped with the following features:

There is a Regalgatter available, which has a number of coils with fiber strands of glass fibers, carbon fibers or textile fibers.

On the Regalgatter guiding devices for removing the fiber strands of the coils and for forwarding the fiber strands are present.

There is a base frame for joint recording of several workstations and devices

- In the initial region of the base frame, a supply device for a plastic inner tube is present, by means of which the plastic inner tube in the alignment of the passage openings of the following workstations can be fed to them

a supply device for an adhesive resin is present, by means of which an adhesive resin in the back region of the plastic inner tube can be poured onto it from a storage container,

there is an annular doctor blade (ring doctor) which surrounds the plastic tube outside and by means of which the infused adhesive resin can be shaped into an annular uniformly thick adhesive resin layer,

- Below the doctor blade a drip tray is arranged for the sta eifteen adhesive resin amount,

there is a take-off device for a nonwoven wound on bobbins in the form of a random fiber fleece,

a guiding and shaping device is provided by means of which the fleece can be guided from the unwinding device to the plastic inner tube and can be shaped to form a hose which is open in the longitudinal direction and surrounds the plastic inner tube on the outside,

an annular doctor blade is present, by means of which the hose formed by the fleece can be embedded in the adhesive resin layer to form an adhesive and buffer layer and at the same time the excess quantity of adhesive resin can be stripped off,

there is a supply device for a synthetic resin, by means of which a synthetic resin can be poured from a storage container in the back region of the plastic inner tube,

- There is a guiding and shaping device which surrounds the Kunstbtcffinnenrohr outside and by means of which the fibers of a number derived from the Regalgatter fiber strands in the form of a closed frusto-conical fiber shell to the plastic inner tube are hindurchleitbar,

an annular blade is present by means of which the cast-on synthetic resin can be shaped into a uniformly thick synthetic resin layer and by means of which at the same time the fiber jacket can be embedded in the synthetic resin layer to form an axial reinforcing layer,

there is a supply device for a synthetic resin, by means of which a synthetic resin can be poured from a storage container in the back region of the plastic inner tube,

- it is a kr? örmtger coil carrier present, which surrounds the plastic inner tube in the middle and which is rotatably mounted on a storage rack,

on the bobbin at least one coil of a fiber strand is rotatably mounted, the bobbin is coupled to a drive with adjustable speed, the bobbin guide devices are arranged by means of the fiber strand of each existing coil for

Plastic inner tube is hindurchleitbar and the circulation of the bobbin for forming a tangential reinforcing layer in

the synthetic resin layer is einbottbar,

There is a supply device for a synthetic resin, by means of which from a reservoir, a synthetic resin in

Back region of the plastic inner tube is pourable,

There is a guiding and shaping device that surrounds the Kunststo'finnenrohr outside and by means of the fibers of a

Number of fiber ropes derived from racks in the form of a closed truncated cone fiber cladding Plastic inner tube are hindurchleitbar,

There is a leash ring doctor present, by means of which the cast resin is moldable into a uniformly thick Kunstharzschicht and by means of the same time the fiber cladding to form a further axial reinforcing layer in the

Synthetic resin layer is embedable,

There is a supply device for a synthetic resin, by means of which a synthetic resin is irr

Back region of the plastic inner tube is pourable,

There is a supply device for a synthetic resin, by means of which from a reservoir, a synthetic resin in

Back region of the plastic inner tube is pourable,

there is a ring-shaped coil support which surrounds the plastic inner tube in the middle and which is rotatably mounted on a bearing rack,

at least one spool of a fiber strand is rotatably mounted on the spool carrier, the spool carrier is coupled to an adjustable speed drive whose direction of rotation is inversely opposite to that of the preceding spool carrier,

On the bobbin guide devices are arranged, by means of which the fiber strand of each existing coil for

Plastic inner tube is hindurchleitbar and the circulation of the bobbin for forming a further tangential Reinforcing layer can be embedded in the synthetic resin layer,

if necessary are still available, depending

A supply device for a liquid synthetic resin,

A leuing and shaping device for leading fiber strands and for passing their fibers in the form of a frustoconical fiber sheath towards the plastic inner tube,

An annular doctor blade for molding the synthetic resin layer and for embedding the fiber jacket in the synthetic resin layer to form another axial reinforcing layer;

• a liquid resin supply device, and

A bobbin for forming a further tangential reinforcing layer, the direction of rotation of this bobbin being opposite to the direction of rotation of the preceding bobbin.

following the last bobbin for forming a tangential reinforcing layer a ring doctor blade is arranged,

by means of which an existing excess of synthetic resin can be stripped off,

there is a supply device "for a synthetic resin, by means of which from a reservoir a synthetic resin for a

Outer skin of the plastic raw res in the back region of the plastic inner tube is pourable,

there is a squeegee, by means of which the cast-resin is malleable to form an outer skin of the plastic tube to a uniformly thick synthetic resin layer,

there is a take-off device for a band-shaped, wound on coils release film, there is a guiding and shaping device, by means of which the release film from the unwinding to

Plastic inner tube is hindurchleitbar and is moldable to a hose open in the longitudinal direction, the outer skin outside

surrounds, wherein the edges of the release film in the region of the underside of the plastic inner tube butt stump, following the guiding and shaping device for the separation tube is arranged a hardness device, the

Plastic pipe surrounds outside,

the hardening device has heat sources and / or radiation sources arranged around the plastic pipe

the hardening device has a guide tube for the plastic tube, whose inside diameter is at least approximately equal to the

Sum of the oil diameter of the plastic raw res and the double wall thickness of the separating tube is the Wall at least in sections and / or by area for those of the heat sources and / or radiation sources

emitted heat or radiation is permeable and extending in the pulling direction on the hardening device beyond, wherein its longitudinal extent is dimensioned so that it is the plastic pipe to at least to that point of his

Movement path surrounds, starting from the outer skin of the plastic tube has a sufficient dimensional stability for the support of the Plastic pipe has on idlers,

the plastic inner tube terminates at least approximately at the rear end of the hardening device, to the hardening device includes a curing test, which has heat-insulating devices that surround the Kunststoffrohraußen,

following the curing line a pulling device is arranged, by means of which the plastic pipe is movable in the pulling direction by frictional engagement,

between the rear end of the guide tube of the hardening device and the traction device support rollers are arranged, which are adjustable to the height position of the underside of the plastic tube and carry the plastic pipe to the pulling device,

Following the pulling device eire separation device is present, which is movable by means of a guide in the direction of movement of the plastic tube and by means of the plastic tube into individual lengths with a particular

Length measure is divisible,

the Trennvorrichtu. ig has a clamping device by means of which it can be firmly clamped to the plastic pipe during a separation process,

the separating device has a return device, by means of which the separating device after completion of a

Separation process in their Ai .. '<Initial position is moved back. When working catfish on such a trained device replaced the plastic inner tube made of a synthetic resin

formed inner skin of the plastic pipe. Instead of the support layer not required because of the plastic inner tube, an adhesive and buffer layer is applied to the plastic inner tube, since this is made of a thermoplastic material. The subsequent reinforcing layers would often not adhere to it or not sufficiently well. However, this is achieved with the adhesive resin layer, which can be fully tailored to the properties of the plastic inner tube, so that a good bond between the plastic inner tube and the adhesive and buffer layer belonging webs, we J, in turn, the subsequent reinforcing layers a good bond received.

The device formed in this way is also very well suited to carrying out the method according to claim 7, by

the adhesive-resin supply device and the non-woven-fabric take-off device of the adhesive and buffer layer are kept out of operation and, if necessary, pushed aside.

After eirler another embodiment of the device according to the invention is at least in part of the feeders

for a liquid synthetic resin, preferably in all feeding devices arranged below the associated annular blade

Drip tray connected via a return line to the reservoir of the feeder. In this embodiment of the device is achieved that the resin is circulated continuously in a feeder,

as far as it does not remain in one or more of the layers of the plastic tube as impregnating resin. Due to the constant circulation of synthetic resin is avoided that it, for example, in the reservoir, partially settles and that in this Teilmengedes resin possibly chemical reactions take place, which are used for curing or even to cure

Kunstharzteilmenno could lead which could also spread to the remaining amount of resin. In addition, by the

constant change > n of the resin, the mixing of either steadily or in portions added Zusatzungsmengedes resin 'facilitates the circulated base amount and thus increases the uniformity of the consistency of the resin.

In a further embodiment of the device, the nonwoven for forming the support layer in two partial webs of each of the Side brought to the mandrel (or to the plastic inner tube) and by means of the guiding and shaping device in the axial Direction extending to each half a circular cylinder deformed. This avoids circumferential lateral forces!

would occur during winding of the web by means of a bobbin.

In this case, the device according to the invention is equipped with the following features: The unwinding device for the fleece for forming a support layer is equipped with two coil carriers, on each of which a coil

a strip-shaped web is equipped whose width is at least approximately equal to half the outer circumference of the Innenh;

The two coils or at least one each guide device for the unwound from them fleece are on both sides of the mandrel in

arranged such a height that the center of the nonwoven tapes are at least approximately in the same horizontal plane as the

Longitudinal axis of the mandrel is located. The guiding and shaping device for the fleece has on both sides of the mandrel per a vane, whose the mandrel

facing inner surface is concavely curved at least in its end, by means of which the nonwoven tape is at least approximately deformable to the lateral surface of half a circular cylinder.

With a development of the device, the presence of second laterally introduced partial webs of the fleece is added thereto

exploited, the resin for the support layer until relatively late on the inner skin and between this and that

Pour or pour in plastic fleece. For this purpose, the device has the following features: The mouth of the synthetic resin supply device for the support layer is in the area of the guide vanes of the guide and Forming device for the nonwoven in the longitudinal direction of the dome arranged at a location where the approaching each other Rims of the two fleece bands just have a sufficiently large distance from each other. An embodiment of the device makes it possible for the fiber strands for an axial reinforcing layer very evenly around

To form the mandrel initially to a frustoconical shell of fiber strands and from the guide ring to a uniform truncated cone fiber cladding, resulting in a very uniform structure of the axial

Reinforcing layer leads. For this purpose, the guiding and shaping device for the fiber strands and the fibers for an axial reinforcing layer

a Leitkranz and preferably a guide ring, which both surround the mandrel outside,

the guide ring has a number of through-holes corresponding to the number of fiber strands to be fed, which are arranged distributed along a single circular ring or along a plurality of circular rings located in the middle of each other and through which one of the fiber strands is drawn,

- The guide ring has an annularly closed inner surface whose inside diameter is smaller than the smallest Kroisring the Atiordnungsmusters of Durchgangslöcher in Leitkranz and is only slightly larger than the Außendurchmessi.r of moving therethrough layer structure for the plastic pipe.

With a further embodiment of the device, the distance between the point of application of the synthetic resin and the point at which the fibers of the fiber cladding are embedded in the synthetic resin layer formed from the synthetic resin is reduced. This avoids that even with synthetic resins with lower viscosity, the resin runs off prematurely from the underlying layer of the plastic tube down and possibly a lack of synthetic resin occurs in the back region of the plastic tube.

For this purpose, the mouth of the supply device for the resin for the axial reinforcing layer in the longitudinal section just before the Leitkranz or, preferably, arranged in the longitudinal section between the guide ring and the guide ring, wherein the feed line preferably extends within the innermost truncated cone lateral surface, which by the Leitkranz is spanned to the guide ring extending fiber strands.

With a further embodiment of the device, a very compact construction of the relevant section of the device is achieved because only one supply device for the synthetic resin is required for forming the support layer and the subsequent two reinforcing layers or for the groupwise formed axial reinforcing layer and tangential reinforcing layer is, with the amount of drip pans and the various connecting lines can be reduced accordingly or these parts can be made correspondingly smaller. In addition, this shortens the production time for the plastic pipe

 In this case, the device is equipped with the following features:

The resin delivery device for the backing layer is sized for a bulk flow of the resin that is greater than the bulk flow required solely for the backing layer and that is sufficient at least for the next axial reinforcement layer, and preferably also for the first tangential reinforcement layer.

- Accordingly, eliminates its own supply device for the resin for the next axial reinforcing layer and possibly also a separate feeder for the resin for the next tangential reinforcing layer.

The axial reinforcing layer resin supplying apparatus, which does not precede a supporting layer, preferably also the feeder for each further axial reinforcing layer, is sized for a resin flow rate greater than the mass flow required solely for the axial reinforcing layer and at least for the following tangential reinforcement layer is sufficient

- Accordingly, eliminates a separate feeder for the resin for the tangential reinforcing layer. The device according to the invention is furthermore equipped with the following features:

At the coil carrier several coils are arranged evenly distributed,

- Preferably, a braking device is provided for each of the coils whose braking force is automatically adjustable by means of a scanning device for scanning the outer diameter of the coil.

In this embodiment of the device, the number of fibers per fiber strand can be reduced in inverse proportion to the number of fiber strands due to the increase in the number of coils on the coil carrier and thus due to the increase in the number of fiber strands for a tangential reinforcing layer, which in turn the pitch angle during winding the fiber strands can be reduced and more can be approximated to the ideal case of purely tangential winding. With the braking device on each coil is achieved that the fiber strands are wound up for the tangential reinforcing layer with a larger bias than is possible alone with the existing by the already existing Roibung the fiber strands on the guide devices basic voltage. Due to the increased tension of the tangential fiber strands, the axial fibers of the underlying reinforcing layer are additionally densified to a considerable extent, and moreover, the tangential fiber strands are also more densely compressed.

In both reinforcing layers, by reducing the spaces between the fibers, the excess resin thereby squeezed out of the reinforcing layer, thus reducing the resin content of the reinforcing layers. In addition, it causes an additional ventilation of the two reinforcing layers daduch, if that is necessary at all.

As a further feature, the device according to the invention comprises the following arrangement:

Each bobbin is coupled via a continuously variable transmission with a common drive shaft (Fig. 4), which is mounted on the base frame and extending from a drive motor to all driven devices out.

In this embodiment of the device on the one hand via the common drive shaft, a coupling of the orbital motion of the bobbin is achieved with each other and on the other hand made possible by the continuously variable transmission adjustment of the rotational speed of each of the bobbin to the existing at its location winding diameter.

The device according to the invention further comprises the following features:

For each of the fiber strands for an axial reinforcing layer there is an adjustable tensioning device by means of which the tension in the fiber strand can be set to a specific value,

- Preferably, the tensioning devices are arranged in the vicinity of the Leitkranzes the control and shaping device.

As a result of this embodiment of the device, the fiber strands for the axial reinforcing layers receive an additional pretension, which exceeds the basic stress, which in any case results from the friction of the fiber strands on the guide devices. It is avoided that the axial fibers already embedded in their synthetic resin layer are displaced in the circumferential direction during winding of the tangential fiber strands and in particular in the case of tangential fiber strands being read through.

According to the invention, the guide tube has a narrow longitudinal gap in the hardening device on its underside. This configuration of the device prevents a small amount of synthetic resin possibly escaping between the separating tube and the wall of the guide tube during curing of the plastic tube from the longitudinal gap of the outer separating tube and thereby adhering the outer separating tube to the guide tube or at least friction between the separating tube and the guide tube increased to a greater extent. The formation of the guide tube in the hardening device as a glass tube which is permeable to infrared light, a uniform curing of the plastic tube is made possible without special measures. The same is done on a slightly longer distance in another embodiment of the device in which a perforated metal tube is used instead of the significantly more expensive infrared transparent glass tube.

In particular, the guide ear in the hardening device is designed as a metal tube. It is preferably made of a low-corrosion and abrasion-resistant steel.

The guide tube has a larger number of through holes, which are arranged offset to one another in the longitudinal direction and in the circumferential direction of the guide tube.

According to the invention, the thermal insulation device of the curing section is formed by a number of cover hoods, which are formed at least approximately as hollow cylinders and whose peripheral wall is formed thermally insulating,

- The covers are slidably felt by means of a longitudinal guide along the plastic tube,

- The longitudinal guide is preferably at least the length of a single cover longer than the sum of the length of all covers.

The traction device is formed according to the invention by two or more chain conveyors, which are preferably arranged in pairs diametrically with respect to the plastic pipe,

the chain conveyors have roller chains which are guided by guide rails at least when the strand is pulled,

- The roller chains are equipped with angle brackets on which driving points are fixed, which are made of an elastomer.

In this embodiment of the device with the chain conveyors, which are equipped with entrainment studs made of an elastomer, both an effective, as well as gentle pulling movement exerted on the plastic tube, which ensures a reliable movement of the plastic tube through all workstations.

According to the invention, the clamping device has two pairs of clamping jaws, one of which is arranged in front of a pair of clamping jaws and the other pair of clamping jaws behind the separating tool of the separating device.

The jaws are preferably by pneumatic! Piston actuators can be actuated. In this embodiment of the device, the separation device during a separation process of the plastic pipe itself

entrained, wherein at the same time the pipe sections are kept on both sides of the separation point even with progressive separation cut gleichgleichverendem distance to each other, so that neither upsetting, nor pulling apart of the tubes can occur at the separation point.

The return device of the separation device has a pneumatic piston drive. This embodiment of the device is a simple way to an automatic return of the separator after

achieved the release of the clamping devices, because the pneumatic piston drive can be adjusted so that he beistetiger exposure to the pneumatic pressure medium with dissolved clamping devices, the braking device in their

Back position can push back and he vice versa sufficient with closed clamping devices

is compliant to allow the entrainment of the separator with the plastic pipe.

According to the invention, the mandrel has a plurality of cylindrical longitudinal sections, the outer diameter of which Holding device is gradually reduced,

- Each transition point from one diameter step to the next is in the direction of movement of the plastic tube immediately adjacent to the winding point of the fiber strand for a tangential reinforcing layer,

- Another crossing point is in the area of the hardening device.

This configuration of the device, the outer diameter of the mandrel is partially adapted to the shrinkage of the plastic tube, more precisely, the blank of the plastic tube, which occurs in the winding stations of the fiber strands for the tangential reinforcing layers and in the hardening device. As a result, the friction of the plastic tube on the mandrel is significantly reduced. This then also reduces the required pulling force to pull the plastic tube through the entire device. In addition, this reduces the holding force for the mandrel and its tensile load. By reducing the friction between the plastic pipe and the mandrel also the risk of intermittent slip movements (the so-called stickslip) of the plastic pipe on the mandrel is prevented. According to the invention, the mandrel is composed of a plurality of independent individual pieces, which are preferably detachably connected to one another by means of a respective threaded connection,

- The joints of the individual pieces are preferably at the transition points from one diameter stage to the next. In this embodiment of the device, the production of the mandrel is simplified and facilitated. In addition, if necessary, the replacement of individual lengths is facilitated, which wear out faster than the other lengths or need to be replaced for other reasons. By dividing the mandrel into individual pieces, the diameter steps can be made easier because the individual pieces can then generally have the same diameter over their entire length.

According to the invention, a connection for a compressed gas, in particular compressed air, is present in the initial region of the mandrel, by means of which a gas under a certain overpressure can be introduced into the interior of the mandrel,

- On the mandrel radial through holes are present at several points of its longitudinal extent, which dry from the interior of the mandrel to the outside,

the through-holes are preferably located on at least a part of the crossing points or in the vicinity of the crossing points,

Preferably, the through holes are formed by radial recesses in the end face of the individual pieces of the mandrel,

- At the junction and at least in the area after the last through hole a bulkhead is ever present, which closes the interior of the mandrel to the outside.

In this embodiment of the device is by the supply of a pressurized gas into the interior of the dome and through

its subsequent emergence through the distributed over the longitudinal extent of the mandrel through holes one each

constructed pneumatic lubricant layer. It also reduces the friction of the plastic tube on the mandrel.

The interior of that portion of the length of the mandrel which is located in the area of the hardening device is opposite

that of the preceding length section closed by a bulkhead,

- This length section has a connection for a arranged in the interior of the mandrel gas line, the pressure is set higher than the positive pressure in the preceding lengths of the dome.

In this embodiment of the device, the overpressure of the compressed gas in this length section of the mandrel can be adjusted independently of the overpressure in the preceding length sections. Thus, the overpressure in this section can be better adjusted to the requirements occurring there, which are mainly due to the fact that the shrinkage of the plastic pipe is greatest in the field of hardening device and be different depending on the resins used and depending on the course of the hardening process can.

In a further embodiment of the invention, the edges of the side cheeks of the guiding and shaping device of a located above the plastic pipe inlet shoulder for the release film in the longitudinal direction of the plastic tube around this steadily towards each other and approach each other in the vertical meridian plane except for a very small residual gap,

- The side surfaces of the edges of the side cheeks run apart at least in the region of the remaining gap from the inner edge to the outer edge at a certain angle,

in the vicinity of the guiding and shaping device a ring doctor blade is arranged which is not completely closed but has a residual gap in the vertical meridian plane at the bottom,

- The side surfaces of the remaining gap of the ring doctor blade run from the inner edge to the outer edge at a certain angle apart.

In this embodiment of the device, the excess amount of the resin can be removed more easily and so a perfect formation of the outer skin of the plastic pipe can be achieved more secure. In addition, this allows the outer diameter of the Kunststofffrchres set more accurate or, in other words, achieve a smaller diameter tolerance of the plastic tube. Due to the residual gap both in the guiding and shaping device as well as in the subsequent ring doctor also the danger is vorgebeut that the resin possibly during stripping over the outside of the release film distributed and sticking to it and then stuck in the hardening device with the release film combines. This is additionally supported by further training of the institution.

In this case, a scraper is arranged in the direction of movement of the plastic tube behind the doctor blade, the scraper is matched to the plastic pipe,

- The drip tray below the ring doctor extends on the one hand to the area of the scraper and on the other hand into the area of the guiding and shaping device.

embodiment

The invention will be explained in more detail below by way of example

 In the accompanying drawing show

1 each a section of a largely schematic side view of the device for continuous production

to 5: fiber reinforced plastic pipes;

Fig. 6 is the first portion of a side view of a partially modified embodiment of the device; FIG. 7 shows a detail of a top view of a ring doctor blade of the device according to FIG. 1; FIG. Fig. 8 is a fragmentary plan view of a combined work station of the apparatus of Fig. 1; 9 shows a side view or a longitudinal section of a guiding and shaping device and a ring doctor blade of the device according to FIG

Figure 1;

FIG. 10: a bottom view of the guiding and shaping device and the annular doctor blade according to FIG. 9; FIG. 11 shows an end view of the guiding and shaping device and the annular doctor blade according to FIGS. 9 and 10.

The device 10 has a machine part 11 with a number of workstations and devices and a Regalgatter 12, which is placed on the front side of the machine part 11 largely separated from this.

In Regalgatter 12 a larger number of coils 13 are housed with fiber strands 14, which are formed from a more or less large number of glass fibers, carbon fibers or textile fibers. The coils 13 are placed with vertically aligned coil axis, so that an internal withdrawal of the fiber strands 14 is possible. For this purpose, numerous guide devices 15 are arranged on the Regalgatter 12 through which the fiber strands 14 are withdrawn from the coils 13 and are passed to the machine part 11. Also, between the Regalgatter 12 and the machine part 11 such Leitvorrichtungen 15 are present, which are shown or indicated for the sake of clarity only in part. The machine part 11 has a base frame 16 which extends over the entire length of the machine part 11 and which receives all belonging to the machine part 11 devices in the correct mutual spatial allocation. Of the base frame 16, with respect to the clarity of the illustration, only a few parts are shown, including a Bodenrahrnen 17, w ie at a certain distance above the bottom frame 17 arranged longitudinal strut 18 and some posts 19th

At the beginning of Grundgectells 16, a holding device 21 is provided which is fixedly connected to the base frame 16. The holding device 21 holds the beginning of a mandrel 22 which is horizontally aligned and which is arranged in a flying manner from the holding device 21 and extends through a number of workstations and devices. The mandrel 22 is formed as a circular cylindrical hollow body.

On the front side of the base frame 16, a unwinding device 23 is arranged, which receives a coil 24 of a strip-shaped wound release film 25 with horizontally and transversely to the longitudinal extension of the base part 16 aligned axis. The separating film 25 is fed via a Leitverrichtung 26 a forming device 27, by means of which in the axial direction over the mandrel 22 free-hanging drawn release film 26 is formed to a mandrel 22 surrounding the separation tube. In the vicinity of the molding device 27, a connecting device 28 is present, which has a take-off device 29, from which an adhesive tape 31 is peeled off and pressed by means of a pressure roller 32 to the abutting or slightly overlapping edges of the separation tube and thereby the edges of the release film 25th impervious to synthetic resin.

The connecting device 28 may also be modified so that, instead of the pressure roller 32, a welding shoe of an ultrasonic welding device is pressed against the one-sided overlapping edges of the separating film 25 and the edges of the separating film 25 are welded together to form the separating tube. A synthetic resin feeder 33 has a resin tank 34, a circulating pump 35, and various pipes 36. From an upper intermediate container 37, a feed tube 38 guides the synthetic resin toward the mandrel. The mouth 39 of the feed tube 38 is arranged at the top of the mandrel 22 in its vertical meridian plane, from which the synthetic resin is poured onto the separating tube and then η I evenly distributed on both sides and forms a closed synthetic resin layer. Some of the parts of the feeding device 33 are surrounded by a box-shaped lining 40, the end walls in the alignment of the mandrel 22 have a passage opening for the Dorr, 22. A part of the panel 40 is designed to be hinged, so that the interior is accessible.

In the pulling direction of the later plastic tube, an annular doctor blade is arranged following the mouth 39, which is referred to below as ring doctor 41, similar to the annular doctor blades described later. This annular doctor blade 41 is arranged on a guide device 42, which will be explained in more detail later with reference to FIG. By this guide device 42, the annular blade 41 is guided immovably in the longitudinal direction of the mandrel and always in the normal plane to the center of the mandrel 22. Of the annular blade 41, the cast by means of the feeder 33 on the separating tube resin is uniformly thicker to an annular. Molded resin layer. This resin layer is heated in a subsequent heater 43 and thereby activated, so that this resin layer gelled to an inner skin of the later plastic pipe.

Below the mouth 39 of the feed tube 38 and below the annular blade 41, a common drip tray 44 is arranged, which collects the dripping from the separating tube or stripped from the annular blade 41 resin and returns it to the reservoir 34. In the heating device 43 there is also a collecting trough 45, which catches the reagents emerging during the gelling of the inner skin. From there, these reagents, including their vapors which form as a result of the heating, are sucked out of the heating device 43 by a fan 46 and collected in a filter 47, preferably in the form of an activated carbon filter. The purified carrier air is blown out freely.

The aspiration of the vapors is assisted by a box-shaped fairing 50, which is similar to the fairing 40.

After the heating device 43, a unwinding device 48 is present, which has two coils 49 of a band-shaped nonwoven 51. The unwinding device 48 is connected to a guiding and shaping device 52, by means of which the two nonwoven belts 51 are guided from the unwinding device 48 to the mandrel 22 and formed there in each case into a half-cylindrical half of a tube 53 open in the longitudinal direction at two diametrically situated points, such as will be explained in more detail with reference to FIG. 8.

In the unwinding device 48 and the guiding and shaping device 52, it should be noted that in FIG. 1 it is pivoted by 90 ° about the longitudinal axis of the mandrel 22 and, in reality, it is aligned in the horizontal plane passing through the longitudinal axis of the mandrel. Therefore, the tube 53 (FIG. 8) formed by the guiding and shaping device 52 in FIG. 1 is delimited by the dotted line 54. Because of the pivoted representation, the unwinding device 48 and the guidance and shaping device 52 connected to it are shown set back from the subsequent devices in the axial direction. Their true assignment in the axial direction is shown in Fig.8.

In reality, in close proximity to the guiding and forming device 52, there is disposed another resin supplying device 55, which is formed substantially the same as the feeding device 33, for which reason reference is made to the description thereof for details.

In spatial proximity to the feeding device 55, a guiding and shaping device 56 is present, which is also explained in more detail with reference to FIG. 8. This guiding and shaping device 56, which surrounds the mandrel 22 on the outside, directs a portion of the fiber strands 14 drawn off from the regaining gate 12 toward the mandrel 22 and arranges them initially as fiber strands 57 along the lateral surface of a truncated cone and then passes the fibers 58 of these fiber strands 57 in the form of a closed truncated conical fiber jacket 5! From dioser annular doctor blade 61, the fibers 58 of the fiber jacket 59 are embedded in the synthetic resin layer, which has formed from the synthetic resin, which was previously poured from the feeder 55 via the feed tube of the guiding and shaping device 52 on the inner skin of the plastic tube. This synthetic resin layer and the fibers 58 embedded in it in axial alignment together form a first reinforcing layer for the plastic tube, which is called an axial reinforcing layer because of the axial orientation of its fibers. The synthetic resin cast on the inner skin via the feed tube 62 was poured with an excess exceeding the receiving volume of the nonwoven webs 51 for the backing layer, which is so large that it is sufficient not only for the first axial reinforcing layer but also synthetic resin for the next reinforcing layer remains. This is formed immediately after the first axial reinforcing layer. For this, in the vicinity of the (air-stirring device 55 for the synthetic resin, there is a ring-shaped coil support 63, which externally surrounds the mandrel 22 and which is rotatably supported by means of a bearing on a bearing frame 64. The coil support 63 is connected by a continuously variable or adjustable transmission 65 driven common drive shaft 66, which is indicated in Fig. 4 and extending from the drive motor 67 arranged there along the base frame 16 to all driven devices, including to the transmission 65 of the bobbin 63, extends.

The bobbin 63 has an even number of coils 68 each consist of a fiber strand 69, which are rotatably mounted on the bobbin 63. In FIG. 1, only two coils 68 are shown for the sake of clarity. In reality, it is expediently at least four coils or even six coils.

On the bobbin 63 guide devices 71 are arranged, by means of which the fiber strand 69 of each of the coils 68 are guided to the mandrel 22. Once the bobbin 63 rotates around the mandrel 22, the fiber strands 69 wrap on the underlying axial reinforcing layer, wherein they are embedded in the excess of the resin, which was received neither by the support layer of the first axial reinforcing layer and from the through lie fleece ribbons 51 formed fleece tube and aiio the fiber cladding of the first reinforcing layer has leaked out to the outside.

At the format-specific reasons purely technical sign separation point 72, which is shown by a dashed line, connect the other devices, which are shown on page 2. The same applies to the other separation points 73 .. .75 in Fig. 2 ... 5.

Following the bobbin 63, there is another liquid resin supplying device 76, which is formed like the feeding device 55. In the area of this feeding device 76, a guiding and shaping device 77 is arranged, which is formed the same as the feeding device 55. In addition, there is an annular blade 78, which is formed equal to the annular blade 61, although the clear width of the annular blade 78 is slightly larger than that of the annular blade 61. By the feeding device 76, a synthetic resin layer is poured, to which the guiding and shaping device 77 dergeneitet from the control gate 12 fiber strands 14 in the form of a frustoconical fiber jacket 79 are passed and embedded by the annular blade 78 in the resin layer. This creates a second axial reinforcing layer. In the vicinity of the feeding device 76, a further bobbin 81 is provided with a plurality of coils 82, which is formed equal to the bobbin 63. The fiber strands 83 withdrawn from the spools 82 are wound on the underlying second axial reinforcing layer as the bobbin 81 revolves and embedded in the synthetic resin layer which has been previously poured by the feeder 76 with a corresponding excess amount. The bobbin 81 runs in the opposite direction of rotation to the bobbin 63. By the feeding device 76 and the bobbin 81, a second tangential reinforcing layer is formed.

Thereafter, another resin supplying apparatus 84 is provided, which is in turn formed like the feeder 76 and through which a synthetic resin layer is poured on the second tangential reinforcing layer with a certain excess amount. By means of a guiding and shaping device 85, fiber strands 14 in the form of a frustoconical fiber jacket 86 are led to the outside of the second tangential reinforcing layer and embedded in the synthetic resin layer by a ring doctor blade 87. By means of a subsequent third coil carrier 88 having a plurality of coils 89, the fiber strands 91 are wound onto the third axial reinforcing layer formed after the annular doctor blade 87 and embedded in the synthetic resin excess to form a third tangential reinforcing layer. If desired or required, by one or more further groups of each of a liquid resin supply device, an axially frusto-conical sheath guiding and shaping device, an annular blade for embedding this fiber sheath in the synthetic resin layer and a coil carrier for tangential Winding a plurality of fiber strands each have a further axial and tangential reinforcing layer are formed.

Following don last coil support 88, a ring doctor blade 92 is provided, under which a collecting tray 93 is disposed.

Thus, any remaining excess resin is stripped off the outside of the outermost tangential reinforcing layer formed by the coil support 88.

Subsequent to the annular doctor blade 92, a further supply device 94 is present, which is formed largely equal to the first supply device 33. By the feeding device 94, a synthetic resin for an outer skin is poured on the outermost tangential reinforcing layer. This resin is formed by means of a squeegee 95 to the outer skin of the plastic tube. Diuse ring doctor blade 95 is guided in the same way w'e the annular doctor blade 41 by means of a guide device, which is explained in more detail in connection with the annular doctor blade 41 in Fig. 7.

Above the dome 22, a Abspu.vorrichtung for a band-shaped wound on a coil 97 Trennfoiie 98 is arranged following the annular blade 95. By means of a saddle-shaped Lei: - and shaping device 99, the release film 98 is from above on the finished up to curing plastic tube 100 lent and thereby formed into a tube that surrounds the outer skin of the plastic tube 100 outside. This tube, which forms an outer separation tube for the plastic tube 100, is open on the underside in the longitudinal direction, wherein the edges of the release foil butt against each other. The width of the release film 98 must therefore be matched to the outer circumference of the outer skin of the plastic tube 100

After the guiding and shaping device 99, once again a ring doctor 101 with a collecting trough 102 arranged underneath is present. This ring doctor 101 strips off that amount of synthetic resin which is displaced to the outside when forming and applying the outer separation tube to the plastic tube 100 under certain circumstances by don longitudinal slot of the outer separation tube. For this reason, in reality, the ping blade 101 is arranged directly next to the guiding and shaping device 99 and shown in Fig. 2 only for the sake of clarity in einigor distance.

To the guiding and shaping device 99 and the annular blade 101 includes a hardening device 103. This has heat sources and / or radiation sources 104, which are most expediently designed as infrared radiators. These radiation sources 104 surround the plastic tube 100 all around, wherein in FIG. 2 the lower part of the radiation sources 104 has been omitted in order to avoid misunderstandings.

The hardening device 103 is equipped with a box-shaped cover 105, which also serves the thermal insulation, in order to avoid the emission or leakage of the heat energy of the radiation sources 104 as far as possible.

In the lower region of the hardening device 103, a collecting trough or collection trough 106 is arranged, through which those reagents or vapors which emerge from the plastic pipe 100 during curing are collected and sucked off by a fan 107 and introduced into a filter 108, where they are filtered out of the carrier air, which is blown out in the purified state.

The hardening device 103 further includes a guide tube 109, which is shown by a broken line in FIG. 2, provided with a larger number of through-holes, which are arranged offset from each other in the longitudinal direction and in the circumferential direction. Through these through-holes, the guide tube 109 for the heat and for the infrared radiation of the radiation sources 104 permeable, which thereby penetrate the plastic tube 100 and can penetrate into this. As a result, the hardening process of the various plastic layers of the plastic pipe is initiated.

The guide tube 109 has a clear width which is at least approximately equal to the sum of the nominal diameter of the finished plastic tube 100 and twice the wall thickness of the separation tube, which was formed from the release film 98. The guide tube 109 is slit on its underside in the longitudinal direction, so that the emerging during the curing process of the plastic tube 100 reagents through the slot and can drain into the sump 106 and they are not pressed into the gap between the outer separation tube and the guide tube 109.

The guide tube 109 extends beyond the portion of the hardening device which has the radiation sources 104 and which is delimited by the cladding 105. The guide tube 109 extends at least up to that point of the path of movement of the plastic tube 100, from which the outer skin of the plastic tube 100 has such a great dimensional stability, that the plastic tube 100 can be supported on support rollers 111, which forward the plastic pipe (Figure 3) ,

The mandrel 22, on which the tube has been guided from the first work station, terminates in the length range of the hardening device 103. From there, the tube is moved on freely while being supported by the carrying rollers 111. These carrying rollers 111 are adjustable to the height position of the plastic tube 100, so that they can also be taken and conveyed tubes of different diameters.

The curing device 103 is followed by a curing line 112, which has thermal insulation devices in the form of thermal insulation hoods 113. These Wärmedämmhaubon 113 have a U-shaped or C-shaped elevation, which is oriented so that the longitudinal gap is located on the underside of the heat insulating hoods 113. It is sufficiently wide that the uprights 114 of the support rollers 111 can extend therethrough. The thermal insulation hoods 113 are guided longitudinally displaceable by means of a longitudinal guide 115 in the longitudinal direction of the tube 100. The longitudinal guide 115 is formed by guide rails 116 and by rollers 117. The guide rails 116 are fixed to the posts 19 of the base frame 16. The rollers 117 are rotatably mounted on the heat insulating hoods 113.

The guide rails 116 have a length that is at least the length of one of the covers 113 longer than the sum of the length of the individual covers 113. As a result, the covers 113 can each individually be moved so far on the guide rails 116 that each point of the guide tube 109 is accessible.

The thermal insulation hoods 113 are shown in Fig. 2 in a retracted position. During operation of the machine part 11 for producing the plastic pipe 100, the covers 113 are moved up to the hardening device 103, so that they already surround the protruding from the hardening device 103 length portion of the guide tube 109 and the part of the plastic pipe 100 therein from loss of heat , which is necessary for the curing of the plastic pipe.

At the end of the guide rails 116 of the longitudinal guide 115, a pulling device 118 is arranged. It has at least two chain conveyors 119, which are arranged diametrically to the plastic pipe 100. To protect the plastic pipe 100, a total of at least four chain conveyors 119 are expediently used.

The chain conveyor 119 each have a roller chain 121, which is guided by a guide rail 122 in the pulling drum, which rests on the plastic tube 100. The roller chains 121 are equipped with angle tabs on which driving lugs 123 are fixed, which are made of an elastomer.

The pulling device 118 is driven by a continuously variable gear 124 by the electric motor 67, to which the continuous drive shaft 66 for the driven devices is also coupled.

Subsequent to the pulling device 118, a separating device 125 is present, by means of which the plastic tube 100 is divided into individual longitudinal sections 126 (FIG. 5) with a specific length dimension. The separating device 125 is designed to be movable by means of a longitudinal guide 127 in the longitudinal direction of the plastic tube 100. The separating device 125 is equipped with a clamping device 128. This has two Klammenbackenpaare 129 of which in the pulling direction of the plastic tube 100 of a before and behind the Trennwerkzeüg 132 of the separator 125 is arranged. Each jaw of these two jaw pairs 129 rr.it each connected to a double-acting pneumatic piston drive 131, through which it can be applied to the plastic tube 100 with a certain clamping force, as shown in phantom in Fig.4 dash-dotted line, or be withdrawn from the plastic tube 100 can, as shown in Fig. 4 left. The separating device 125 is coupled to a return device, not shown, which has a pneumatic piston drive. This is actuated by a control device, which also provides for the actuation of the clamping devices 128. Zweckmätigpr.veise is in the suspend shown in Figure 4 dargestallten starting position of the separator 125, a solid stop exists, against de:! the separating device 125 is pressed by the return device.

At a certain distance from the separating device 125, a pipe racking device 133 is arranged (Fig. 5), which lifts the divided from the endless plastic pipe 100 length portion 126 (Fig. 5) from the alignment line of the plastic pipe 100 and transported to an adjacent pipe storage space.

FIG. 6 shows the first section of the device 10 ', within which a part of the devices is modified with respect to that embodiment which is present in the device 10 and is illustrated in FIG. The device 10 'is adapted to produce a fiber-reinforced plastic tube, similar to the plastic tube 100, on the basis of a plastic inner tube, which generally consists of a thermoplastic material. This plastic inner tube 140 is continuously supplied by means of a feeder 141 in the alignment of the following workstations and devices. On the machine part 11 'of the device 10', a supply device 142 for an adhesive resin is arranged in a first work station, which is substantially equal to the feeding device 33, which is arranged at approximately the same location of the machine part 11. The adhesive resin poured onto the plastic inner tube 140 by the feeder 142 is formed into an annular uniformly thick adhesive resin layer by a squeegee 143. This ring doctor blade 143, like the annular doctor blade 41, is connected to a guide device, as will be explained in more detail with reference to FIG.

In addition to the feeding device 142, there is a unwinding device 144, which has two spools 145 with a band-shaped nonwoven wound thereon in the form of a random fiber fleece. In addition, a guiding and shaping device 147 is arranged, by means of which the two nonwoven belts 146 withdrawn from the unwinding device 144 are guided to the plastic inner pipe 140 and thereby formed into the two semi-cylindrical halves of a hose which is open in the longitudinal direction.

Subsequent to the guiding and shaping device 147, a ring doctor blade 148 is arranged, by means of which the two-part nonwoven hose is embedded in the adhesive resin layer formed by the feed device 142 and the annular doctor blade 143, whereby an adhesive and buffer layer on the outside of the plastic inner tube 140 is formed. The thereby stripped excess adhesive resin is collected by a sump 149 and returned from there to the reservoir of the feeder 142. On the adhesive and buffer layer are successively three times an axial reinforcing layer and alternately applied to a tangential reinforcing layer, with devices such as those described in the device 10 for the production of the plastic tube 100 in more detail. The only difference with that device is that on the inlet side of the first synthetic resin layer feeding device 55, the unwinding device 48 and the guiding and shaping device 52 for the tubular nonwoven insert of the supporting layer are absent. In the device 10 ', only a quantity of resin sufficient for the first axial reinforcing layer and the first tangential reinforcing layer is applied to the adhesive and buffer layer on the plastic inner tube 140 by the feeder 55. From Fig. 7, the annular blade 41 and the associated with her guide device 42 can be seen in detail. The guide device 42 has two guide arms 151 which are interconnected via a yoke 152. At the yoke 152, the annular blade 41 is mounted interchangeable. The two guide arms 151 are each pivotally supported by means of a ball joint 153 and held immovably in the direction indicated by the arrow 154 pulling direction of the later plastic tube 100. The two guide arms 151 extend beyond the ball joints 153 out to the other side, where ever a balance weight 155 is clamped to them. The two balance weights 155 are designed so that they can balance the weight moment of the guide arms 151 on the other side including the yoke 152 and the annular blade 41 and two guide rollers 156 and their support arms 157 down to a certain residual weight force. With this residual weight force, the guide rollers are located on the mandrel 22, wherein the inner separating tube, not shown, for the later plastic tube 100 is still therebetween.

In order to achieve good guidance of the annular blade 41 in both the vertical direction and in the horizontal direction, the guide rollers 156 rotatably mounted on the support arms 157 are aligned so that their running plane at least approximately passes through the longitudinal axis of the mandrel 22 and the two levels of travel at an angle between 60 ° and 120 °, the optical angle being 90 °.

So that the running plane of the guide rollers 156 can be aligned with the diameter of the mandrel 22 or the plastic inner tube 140 on the longitudinal axis of the mandrel 22 and the plastic inner tube 140, it is expedient, the support arms 157 rotatable about its longitudinal axis with the Yoke 152 to connect.

In the following, the guiding and shaping device 52 for the fleece belts 51 and the guiding and shaping device 56 for the fiber strands 14 will be explained in more detail with reference to FIG.

The guiding and shaping device 52 has for each of the nonwoven belts 51 each a vane 161, the mandrel 22 facing inner surface 162 is concavely curved at least in its end, so that the first plane nonwoven belt 51 is approximately deformed to the lateral surface of a half-circular cylinder and as Fleece tube half 163 can be fed to the mandrel 22, from which after their union the fleece tube 53 is formed, which is open at the top and the bottom of the mandrel 22 in the longitudinal direction.

The guiding and shaping device 56 for the fiber strands 14 has a guide ring 164 and a guide ring 165. In Leitkranz 164 a number of fiber strands 14 corresponding number of through holes 166 is present, by dia each one of the fiber strands 14 is pulled through. The through holes 166 are either along a single annulus or along

arranged distributed more circular rings, which are centered to each other. The number of these circular rings depends on the number and the thickness of the fiber strands 14. The guide ring 165 has an annularly closed inner surface 167, which, as shown in Fig. 8, for example, by the inner surface of an inserted in the guide ring 165 wire ring 168 can be embodied. This wire ring 168 is made of a spring steel and spread in the manner of a spring ring for holes beyond its nominal width out and inserted into elastically compressed state in a groove on the inside of the guide ring 165. In this way, the wire ring 168 can be easily replaced when worn.

The nominal all inner surface 167 of the guide ring 165 has a smaller inner diameter than the smallest circular ring of the arrangement pattern of the through holes 166 in the guide ring 164. In this way, the fiber strands 14 are fed from the guide ring 164 in the form of a frusto-conical fiber strand jacket 169 the guide ring 165. In the narrower guide ring 165, the fiber strands 14 are so close together that their fibers in the guide ring 165 form a closed frusto-conical fiber shell 170, which is guided by the guide ring 165 ausderder wrestle 61, the fibers of the fiber sheath 170 are merged in the circumferential direction more dense and thereby the existing on the outside of the support layer excess amount of the resin approach each other so far that oie already on the route between the guide ring 165 and the annular blade 61 dip into this resin layer and then completely embedded by the annular blade 61 and from there on the first axial Reinforcing layer of the later plastic tube 100 form. As can be seen from FIG. 8, the two fleece tube halves 163 are brought together to form the fleece tube 53 approximately in the region of the guide rim 164 of the guiding and shaping device 56. The infusion of the synthetic resin both for the supporting layer and for the subsequent two reinforcing layers takes place the feed tube 38 of the feeder 33 between the mutually approaching edges of the fleece tube halves 163, the mouth 39 of the feed tube 38 is moved as far as possible into the closing gap inside.

The fiber strands 14 used in the various guiding and shaping devices 15; 26; 27; 52; 56; 77; 99; 147 to a frustoconical fiber cladding 59; 79; Are formed and then embedded to form an axial reinforcing layer in the resin layer in question, are expediently before their entry into the guide ring 164 of the guiding and shaping device 147 by a respective clamping device not shown in the drawings individually on the friction by the guide devices 15 already existing basic tension also tensioned. It is important to ensure a uniform total tension of the fiber strands with each other. Also from the bobbins 63; 81; 88 withdrawn fiber strands 69; 83; 91, which are wound onto the underlying axial reinforcing layer and embedded in the existing synthetic resin layer to form a tangential reinforcing layer, are also additionally biased. For this, the coils 13; 68; 82; 89 on the bobbin 63; 81; 88 is braked by a respective braking device whose braking force is controlled by a control device in response to the respective outer diameter of the coil, which is scanned for this purpose by a button in the control device.

So far, for the sake of simplicity, it has been assumed that the mandrel 22 is an elongate and continuous cylindrical hollow body of constant outside diameter. In reality, the mandrel 22 has a plurality of longitudinal sections, although all are cylindrical, but whose outer diameter is gradually reduced from the holding device 21 to its end in the region of the hardening device 103. For practical reasons, the mandrel 22 is composed of several independent individual pieces, which are connected at their ends by a respective threaded connection. Conveniently, the length of the independent individual pieces is chosen so that the junction of the individual pieces coincide with the transition points from one diameter stage to the next. As a result, the individual pieces of the mandrel 22 can be manufactured over their entire length, each with a constant outer diameter. After joining these individual pieces in the correct order then results in the gradation of the outer diameter of the entire mandrel 22 by itself.

At the mandrel 22, the transition points are placed from one diameter stage to the next there, where in the still compliant, because not yet cured. Plastic pipe 100 tends to eiwa due to external influences to reduce the diameter. These are, above all, those points at which the fiber strands for a tangential amplification happens to be wound up on the blank of the plastic tube 100 which was present until then. This winding of the fiber strands always causes the previous axial reinforcing layer to wrap around, thereby embedding its fiber strands in the plastic layer and thereby compacting both this layer and the tangential reinforcing layer itself. This compression of the pipe wall causes there every time a slight narrowing of the blank. Therefore, it is expedient to arrange the transition point from one diameter step to the next in the direction of movement d6s plastic tube 100 immediately adjacent to the winding point of the fiber strand for a tangential reinforcing layer where the narrowing of the tube wall makes the strongest noticeable. From there it is generally retained until the next take-up point of a fiber strand for the next tangential reinforcing layer without change.

A narrowing of the plastic pipe 100 occurs in the area of the hardening device 103 for other reasons. There, the intensively initiated curing process of the plastic contained in the tube wall causes a shrinkage of the plastic tube 100. It is therefore expedient to arrange a further transition point from one diameter step to the next in the region of the hardening device 103.

Depending on the type of resins used and their volume behavior during curing in the curing station 103, it may be useful beyond reducing the outer diameter of the mandrel 22, in this length section the mandrel 22 no longer exactly cylindrical but even slightly conical with in the direction of movement of the plastic tube 100 decreasing outer diameter form.

The relatively close concern of the on the mandrel 22 gradually building plastic pipe 100 can also be used to apply a kind of pneumatic lubrication. For this purpose, a pressurized gas is introduced into the interior of the mandrel 22 via a supply line not shown in FIG. 1 for the sake of clarity. In the simplest case, compressed air is used as a pneumatic lubricant.

In order to prevent the arbitrary escape of the compressed gas from the axial opening of the mandrel 2, at a location of its initial area, at which no other externally interchangeable devices must be introduced, a bulkhead attached, by the back pressure of the compressed gas is prevented. Such a bulkhead is most easily arranged at a junction of two individual pieces of the mandrel 22. There then the connection of the compressed gas line is the easiest. For the construction of a pneumatic lubrication are in several places the

Longitudinal extension of the mandrel 22 radial through holes attached, from the inside of the mandrel 22 to its Go outside. It is expedient, these through holes at the crossing points of a To arrange diameter stage to the next, because the pneumatic Schmierm at the beginning of a length section with

reduced outside diameter is the easiest to build and from there on the one hand under the action of the

Overpressure of the nachströmenden pneumatic Schmiermitteis.und on the other hand by the migration movement of the Plastic tube 100 on the mandrel 22 can spread easily in the axial direction. In the simplest case we ^r the through holes by radial recesses on the end face of the Einzeistücke the Dorns 22 formed. As a result, the attachment of separate holes in the individual pieces can be omitted in general. Since the shrinkage of the plastic pipe 100 in the region of the hardening device 103, depending on the type of plastics used

and also depending on the nature and intensity of the heat supply or supply of radiation to initiate and continue the curing process, may be different, it is appropriate in this length of the Dc ns 22 to complete the interior by an additional bulkhead from the interior of the preceding lengths and over this

Bulkhead to connect the adjoining interior to a separate compressed air line through the hollow mandrel 22nd

is passed through and which is connected to a compressed gas source whose pressure is greater than the overpressure in the preceding lengths of the mandrel 22 or may be. This makes it possible, if necessary, in this

Length portion of the mandrel 22 by increasing the gas pressure to the lubricating effect of the pneumatic lubricant

increase.

Thus, the compressed gas used as a pneumatic lubricant does not escape arbitrarily at the end of the mandrel 22 and

Thus, the desired pressure build-up would not be possible, the mandrel 22 is in the region of its end by a bulkhead completed.

In the following, with reference to FIGS. 9 to 11, the guiding and shaping device 99 and the adjacent annular doctor blade 101 become closer

explained.

The guiding and shaping device 99 for the separating film 98 works somewhat differently than, for example, the inner forming device 27 Separating film 25. Likewise, the annular blade 101 works slightly different than the dior used before Israel doctor blades 61; 78; 87 and 95. The

is because that in the latter ring doctor blades 61; 78; 87; 95 that there any remaining excess resin is stripped directly from the outside of the tube blank. In the guiding and forming device 99, the release film 98 is wrapped around the last or outermost synthetic resin layer of the plastic pipe 100, thereby wrapping the plastic pipe 100 therethrough. The saddle-shaped guiding and shaping device 99 has a main body 171 which is of a thick wall

Circular rirly cylinder is derived, along an oblique and at the same time slightly curved cutting line

is cut off. The edges 172 of the side walls 173 of the main body 171 extend from one above the

Plastic pipe 100 located inlet shoulder 174 for the release film 98 in the longitudinal direction of the plastic tube 100 um

this around, steadily towards each other. They approach each other in the vertical meridian plane except for a very small one

Residual gap 175. Its gap width is on the order of a few hundredths of a millimeter. It is partly oriented

according to the hydraulic properties of the resin to be stripped, such as toughness, surface tension and the like.

As can be seen from FIG. 11, the side surfaces 176 and 177 extend from their inner edge 178 in the region of the residual gap 175

to the outer edge 179 out at a certain angle apart, which is generally 90 ° in total.

The outer portions 181 of the inlet shoulder 174 may be made either integrally with the Grur.dkörpor 171. you

but can also be prepared as separate parts and connected, for example by screwing with the body 171 subsequently.

The annular blade 101 arranged in the vicinity of the guiding and shaping device 99 is the same as the shaping device 99

not closed to a complete ring. On the contrary, in the vertical meridian plane at the bottom, it has a residual gap 182 which is similar to the residual gap 175 of the shaping device 99 and is located in its alignment line. As with the forming apparatus 99, in the squeegee 101, the side surfaces 183 and 184 of the residual gap 182 diverges from the inner edge to the outer edge at an angle generally equal to the angle of the side surfaces 176 and 177 on either side of the remainder gap 175 also an axial view of the annular blade 101.

The drip tray 1C2 shown in Figure 2 only below the annular blade 101 extends in reality under the Forming device 99 along. This drip pan 102 extends only slightly beyond the outer edges 179 in dot transverse direction

out and therefore because of their relatively small width also referred to as a gutter knows the.

At the end of the drip pan 102 located in the direction of movement of the plastic pipe 100 beyond the annular blade 101

a scraper 185 is arranged, the scraper edge 186 is matched to the outer contour of the plastic tube 100.

The scraper 185 removes from the plastic pipe 100 those synthetic resin residues which, after leaving the annular doctor blade 101 in FIG Area whose residual gap 182 should be adhered to the underside of the plastic tube 100.

Claims (37)

1. A process for the continuous production of asbestos-reinforced plastic pipes, characterized in that the process steps: - On a horizontal mandrel, which is held in its initial region by a holding device and is arranged from there flying, a band-shaped release film in the longitudinal direction of the mandrel is continuously drawn onto this and thereby formed into a mandrel enclosing the separating tube, wherein the edges the release film   impervious to each other, the separation tube is continuously moved in the pulling direction of the plastic tube through all subsequent processing stations, - On the separation tube, a liquid resin is poured and formed by means of an annular doctor blade (ring doctor) to an annular uniformly thick synthetic resin layer, - This resin layer is brought to form an inner skin of the plastic roh res by heat to gel, - On the inner skin, a liquid synthetic resin is poured and embedded in the forming resin layer, a band-shaped web without gaps, thus forming a support layer, - On the backing layer of liquid synthetic resin is poured, from which forms a synthetic resin layer, - From a Regalgatter a larger number of fibers are withdrawn in the form of multiple fiber strands, fed to a radially spaced around the mandrel guide devices, fed from this in the form of a closed frusto-conical fiber jacket of a mandrel surrounding the mandrel and from this to form an axial Reinforcing layer embedded in the synthetic resin layer, - On the axial reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer, - Of a circulating around the mandrel in a certain direction of rotation annular coil carrier having at least one coil with a number of fibers in the form of a fiber strand is deducted from the coil or from the coils of the fiber strand, wound on the axial reinforcing layer tangentially with the smallest possible pitch angle and thereby embedded in the synthetic resin layer to form a tangential reinforcing layer, wherein at the same time the fibers of the underlying axial reinforcing layer are compressed towards the mandrel, - On the tangential reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer, - From a Regalgatter a larger number of fibers are withdrawn in the form of multiple fiber strands, fed to a radial distance around the mandrel around arranged guide device, fed from this in the form of a closed frusto-conical fiber jacket of a mandrel surrounding the mandrel and from di jser to Forming a further axial reinforcing layer embedded in the synthetic resin layer, - On the axial reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer, - From one around the mandrel in the opposite direction of rotation to the previous coil carrier circulating corona-shaped further coil carrier having at least one coil with a number of fibers in the form of a fiber strand, is deducted from the coil or from the coils of the fiber strand, tangentially to the axial reinforcing layer wound as small as possible slope angle and thereby embedded to form a further tangential Verstärkungsschi ^ * η the synthetic resin layer, wherein at the same time the fibers of the underlying axial reinforcing layer are compressed to the mandrel, if necessary, a further axial reinforcing layer and a further tangential reinforcing layer are formed on this tangential reinforcing layer, the direction of rotation of the reel support used being in the opposite direction to that of the preceding coil carrier, after the last tangential reinforcing layer an existing excess of resin is stripped off by means of an annular doctor blade, - On the outermost reinforcing layer, a liquid resin is poured and by means of a squeegee to a uniform thicker; Shaped skin of the plastic tube, on the outer skin, a band-shaped separating film is placed continuously in the longitudinal direction of the dome by means of a guiding and shaping device and thereby formed into a separating tube enclosing the outer skin, the plastic tube thus formed is passed through a hardening device in which the hardening of the synthetic resin layers is initiated and at least partly completed by the action of heat and / or by the action of light, - Within the hardening device, the plastic pipe is removed from the mandrel ending there, - After the hardening device, the finished plastic pipe is divided by means of a separator into individual lengths with a certain length. 2. The method according to claim!, Characterized by the method step: the nonwoven for the backing layer is withdrawn either in the form of a ribbon from a spool, or preferably in the form of two or more ribbons, from the corresponding number of spools disposed on a donut-shaped spool carrier revolving around the mandrel the inner skin is wound up completely and without overlapping and thereby embedded in the second synthetic resin layer formed on the inner skin. 3. The method according to claim 1, characterized by the method step: - The nonwoven fabric for the support layer is in the form of a strip whose width is at least approximately equal to the circumference of the support layer, deducted from a coil which is disposed above the dome, and introduced by means of a guiding and shaping device to the mandrel on all sides embedded in the second synthetic resin layer. 4. The method according to claim 1, characterized by the method step: - The web for the support layer is deducted in the form of two bands whose total width is at least approximately equal to the circumference of the support layer, each of a coil which are arranged on both sides of the mandrel diametrically to this, and by means of a guiding and shaping device to the mandrel introduced on all sides and thereby embedded in the synthetic resin layer. 5. The method according to claim 1 in conjunction with one of claims 2 to 4, characterized by the method steps: the synthetic resin cast on the inner skin for the backing layer is infused with an excess exceeding the minimum amount for the backing layer, sufficient to form the synthetic resin layer at least for the first axial reinforcing layer, preferably at the same time for the first tangential reinforcing layer; the nonwoven for the support layer is embedded in this synthetic resin layer in such a way that the excess amount of the synthetic resin which exceeds the receiving volume of the nonwoven leaves out through the nonwoven, the fiber strands for the axial reinforcing layer led to the mandrel via the first guide ring are embedded in the synthetic resin layer formed by the excess amount by the relevant annular doctor blade for forming the axial reinforcing layer, - In the event that the excess amount is sufficient for the second reinforcing layer, the fiber strands drawn off from the first coil carrier for the tangential reinforcing layers, the axial reinforcing layer tangentially wound and thereby embedded in the excess amount. 6. The method according to claim 1, characterized by the method steps: a plastic inner pipe is fed by means of a feed device in a horizontal orientation concentrically to the subsequent processing stations and is steadily moved white in the pulling direction of the pipe, - On the plastic inner tube, a liquid adhesive resin is poured for an adhesive and buffer layer and formed by means of an annular doctor blade (ring doctor) to form an annular uniformly thick adhesive resin layer, - In this adhesive resin layer, a band-shaped nonwoven fabric (random fiber fleece) is embedded without gaps to form the adhesive and buffer layer, on the adhesive and buffer layer, a liquid synthetic resin is poured, from which a synthetic resin layer is formed, - From a Regalgatter a larger number of fibers are withdrawn in the form of multiple fiber strands, fed to a radially spaced around the mandrel arranged guide device, from this in the form of a closed frusto-conical fiber cladding fed to a mandrel surrounding the mandrel and embedded by this for forming an axial reinforcing layer in the resin layer, - On the axial reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer, - Of a circulating around the mandrel in a certain direction of rotation annular coil carrier having at least one coil with a number of fibers in the form of a fiber strand, is deducted from the coil or from the coils of the fiber strand, wound on the first reinforcing layer tangentially with the smallest possible pitch angle and thereby embedded in the synthetic resin layer to form a tangential reinforcing layer, wherein at the same time the fibers of the underlying axial reinforcing layer are compressed towards the mandrel, - On the tangential reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer, - From a Regalgatter a larger number of fibers are withdrawn in the form of multiple fiber strands, fed to a radial distance around the mandrel arranged guide device, fed from this in the form of a closed truncated cone fiber cladding of a mandrel surrounding the mandrel and from this to form another axial reinforcing layer embedded in the synthetic resin layer, - On the axial reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer, - From one around the mandrel in the opposite Drehriohtung to the previous coil carrier circulating corona-shaped further coil carrier having at least one coil with a number of fibers in the form of a fiber strand, is deducted from the coil or from the coils of the fiber strand, tangentially to the axial reinforcing layer rolled as small as possible pitch angle and thereby embedded to form a further tangential reinforcing layer in the resin layer, wherein at the same time the fibers of the underlying axial reinforcing layer are compressed towards the mandrel, if necessary, a further axial reinforcing layer and a further tangential reinforcing layer are formed on this tangential reinforcing layer, the direction of rotation of the reel support used being in the opposite direction to that of the preceding coil carrier, after the last tangential reinforcing layer an existing excess of resin is stripped off by means of an annular doctor blade, - On the outermost reinforcing layer, a liquid synthetic resin is poured and formed by means of a squeegee to a uniformly thick outer skin of the plastic tube, on the outer skin, a band-shaped separating film is placed continuously in the longitudinal direction of the mandrel by means of a guiding and shaping device and thereby formed into a separating tube enclosing the outer groove, the plastics pipe thus formed is passed through a hardening device in which, by the action of heat and / or by the action of light, hardening of the synthetic resin layers is initiated and at least partly completed, - Within the hardening device, the plastic pipe is removed from the mandrel ending there, - After the hardening device, the finished plastic pipe is divided by means of a separator into individual lengths with a certain length. 7. The method according to claim!, Characterized by the method steps: - A plastic inner tube, which is provided with an adhesive layer, which is formed by a fabric or mat strip, which was embedded by heat treatment of the outside of the plastic inner tube in this is fed by means of a feeder in a horizontal orientation concentric to the subsequent processing stations and in the Pulling direction of the tube continuously moved, on the adhesive layer, a liquid synthetic resin is poured, from which a synthetic resin layer is formed, - From a Regalgatter a larger number of fibers are withdrawn in the form of multiple fiber strands, aor supplied at a radial distance around the mandrel arranged guide device, from this in the form of a closed frusto-conical fiber cladding -4- 290 343 fed to a mandrel surrounding the mandrel and embedded by this for forming an axial reinforcing layer in the resin layer, - On the axial reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer, - Of a circulating around the mandrel in a certain direction of rotation annular coil carrier having at least one coil with a number of fibers in the form of a fiber strand, is deducted from the coil or from the coils of the fiber strand, wound on the first reinforcing layer tangentially with the smallest possible pitch angle and with it. embedded in the synthetic resin layer to form a tangential reinforcing layer while at the same time compressing the fibers of the underlying axial reinforcing layer towards the mandrel, - On the tangential reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer, - From a Regalgatter a larger number of fibers are withdrawn in the form of several fiber strands, fed to a radially spaced around the mandrel hergm arranged guide device, fed from this in the form of a closed truncated cone fiber cladding of a mandrel surrounding the mandrel and from this to form another axial reinforcing layer embedded in the synthetic resin layer, - On the axial reinforcing layer, a liquid resin is poured, from which forms a synthetic resin layer, - From one around the mandrel in the opposite direction of rotation to the previous coil carrier circulating corona-shaped further coil carrier which has at least one coil with a number of fibers in the form of a fiber strand is deducted from the coil or from the coils of the fiber strand, tangentially to the axial reinforcing layer unrolled as possible loop angle and thereby embedded to form a further tangential reinforcing layer in the resin layer, wherein at the same time the fibers of the underlying axial reinforcing layer are compressed towards the mandrel, if necessary, a further axial reinforcing layer and a further tangential reinforcing layer are formed on this tangential reinforcing layer, the direction of rotation of the reel support used being in the opposite direction to that of the preceding coil carrier, after the last tangential reinforcing layer an existing excess of resin is stripped off by means of an annular doctor blade, - On the outermost reinforcing layer, a liquid synthetic resin is poured and formed by means of a squeegee to a uniformly thick outer skin of the plastic tube, a band-shaped release film in the longitudinal direction of the mandrel is placed continuously on the outer skin by means of a guiding and shaping device, thereby forming a separating hose which encloses the outer skin, the plastic pipe thus formed is passed through a hardening device in which hardening of the synthetic resin layers is initiated and at least partly completed by the action of heat and / or by the action of light, - Within the hardening device, the plastic pipe is removed from the mandrel ending there, - After the hardening device, the finished plastic pipe is divided by means of a separator into individual lengths with a certain length. 8. The method according to any one of claims! to 7, characterized by the method steps: for an axial reinforcing layer not immediately preceded by a supporting layer, the synthetic resin is poured with an excess in excess of the minimum amount for the axial reinforcing layer, sufficient to thereby also form the synthetic resin layer for the immediately following tangential reinforcing layer, the fiber strands for the axial reinforcing layer brought to the mandrel via the second guide ring are embedded by the relevant annular doctor blade in the previously formed synthetic resin layer so that the excess amount exceeding the receiving volume of the fiber strands for the axial reinforcing layer exits through the fibers, The fiber strands drawn off from the second coil carrier for the tangential reinforcing layer are wound tangentially on the axial reinforcing layer and thereby embedded in the excess quantity. 9. Device for the continuous production of fiber-reinforced plastic pipes, characterized by the features: - There is a Regalgatter (12) having a number of coils (13) with fiber strands (14) made of glass fibers, carbon fibers or textile fibers, - on Regalgatter (12) guide devices (15) for removing the fiber strands (14) from the coils (13) and for forwarding the fiber strands (14) are present, - There is a base frame (16) for the joint recording of multiple workstations and devices, - In the initial region of the base frame (16) has a holding device (21) for a mandrel (22) is arranged, by means of which the mandrel (22) in its initial region with the base frame (16) is fixedly connected. - The mandrel (22) is designed as elongated cylindrical hollow body, - There is a take-off device (23) for a band-shaped wound on coils release film (25), - There is a guide device (26) for the release film (25) by means of which of the unwinding device (23) withdrawn separating film (25) in the axial direction of the mandrel (22) can be fed, in the Anfangsbe rich of the dome (22) is a shaping device (27) is arranged, by means of which of the guide device (26) derived release film (25) around the mandrel (22) around a separating tube is malleable, - There is a connecting device (28) by means of which the edges of the separation tube shaped separating film (25) are impermeable to each other for synthetic resin, - There is a supply device (33) for a synthetic resin, by means of which from a reservoir (34), a synthetic resin in the back region of the mandrel (22) is pourable onto the separating tube, - there is an annular doctor blade (41) (ring doctor), which surrounds the mandrel (22) on the outside and which has a certain clear width, - Below the annular blade (41) a collecting trough (44) is arranged for the stripped amount of resin, - Following the ring doctor (41) is a Erwärmungsvo ;; direction (43), which surrounds the mandrel (22) on the outside and by means of which the synthetic resin layer present on the separating hose can be gelled to form an inner skin of the plastic pipe, - There is a supply device (55) for a synthetic resin, by means of which from a reservoir, a synthetic resin in the back region of the dome (22) is pourable onto the inner skin, - there is a take-off device (48) for a wound on spools (49) nonwoven fabric (51) in the form of a random fiber fleece, - There is a guiding and shaping device (52) by means of which the fleece (51) from the unwinding device (48) to the mandrel (22) is hindurchleitbar and to a longitudinally open tube (53) is malleable, the outside of the dome surrounds, an annular doctor blade (61) is provided by means of which the cast-on synthetic resin can be shaped into a uniformly thick synthetic resin layer and by means of which the hose formed by the nonwoven fabric (51) can be embedded in the synthetic resin layer to form a supporting layer, - There is a supply device (55) for a synthetic resin, by means of which from a reservoir, a synthetic resin in the back region of the mandrel (22) is pourable, - There is a guiding and shaping device (56) which surrounds the mandrel on the outside and by means of the fibers of a number of Regalgatter (12) derived fiber strands (14) in the form of a closed frusto-conical fiber jacket (59) to the mandrel (22) hinleitbar are, an annular doctor blade (61) is provided by means of which the cast-on synthetic resin can be shaped into a uniformly thick synthetic resin layer by means of which at the same time the fiber sheath (59) can be embedded in the synthetic resin layer to form an axial reinforcing layer, - There is a supply device (55) for a synthetic resin, by means of which from a reservoir, a synthetic resin in the back region of the mandrel (22) is pourable, - There is a ring-shaped bobbin (63) is present, which surrounds the mandrel (22) in the middle and which is rotatably mounted on a bearing frame (64), at least one coil (68) of a fiber strand (69) is rotatably mounted on the coil carrier (63), the bobbin (63) is coupled to a drive (65; 66; 67) with adjustable speed, on the bobbin (63) guide devices (71) are arranged, by means of which the fiber strand (69) from each existing coil (68) to the mandrel ( 22) is insertable and can be embedded in the synthetic resin layer during circulation of the coil carrier (63) to form a tangential reinforcing layer, there is a supply device (76) for a synthetic resin, by means of which from a reservoir, a resin in the back region of the mandrel (22) is pourable, there is a guiding and shaping device (77) surrounding the mandrel outside and by means of the Fibers of a number of Reggeratter (12) derived fiber strands (14) in the form of a closed frusto-conical fiber shell (79) to the mandrel (22) are hindurchleitbar, there is a ring doctor blade (78) present, by means of which the cast-resin to form a uniformly thick synthetic resin layer and by means of which at the same time the fiber cladding (79) can be embedded in the synthetic resin layer to form a further axial reinforcing layer, a synthetic resin supply device (76) is provided by which a synthetic resin can be poured from a reservoir in the back region of the mandrel (22) , There is a ring-shaped bobbin (81), which surrounds the mandrel (22) in the middle and on a bearing frame is rotatably mounted, on the bobbin (81) is at least one coil (82) from a. Fiber strand (83) rotatably mounted, the bobbin (81) is coupled to a drive with adjustable r speed whose direction of rotation is inverse to that of the preceding bobbin, on the bobbin (81) guide means are arranged by means of the fiber strand (82) of each existing coil (32) to the mandrel (22) ι is inleitbar and the circulation of the bobbin (81) is embedable in the synthetic resin layer to form a further tangential reinforcing layer, if necessary are still available, depending A liquid resin supply device (84), A guiding and shaping device (85) for guiding fiber strands (14) and for passing their fibers in the form of a frustoconical fiber sheath (86) towards the mandrel (22), An annular doctor blade (87) for molding the synthetic resin layer and for embedding the fiber sheath (86) in the synthetic resin layer to form a further axial reinforcing layer, • a liquid resin supply device (84) and A coil carrier (88) for forming a further tangential reinforcing layer, the direction of rotation of said coil carrier (88) being opposite to the direction of drift of the preceding coil carrier (63), following the last bobbin (88) to the image one-aortangential reinforcing layer an annular doctor blade (92) is arranged, by means of which an existing excess of synthetic resin can be stripped off, there is a supply device (94) for a synthetic resin, by means of which from a reservoir, a synthetic resin for an outer skin of the plastic raw res in the back region of the mandrel (22) is pourable, there is a ring groove (95) by means of which the cast resin for molding an outer skin of the plastic pipe into a uniformly thick synthetic resin layer is moldable, it is a take-off device (96) for a band-shaped, wound on coils release film (98) available, there is a guiding and shaping device (99) by means of which the separating film (98) of the unwinding device (96) can be guided towards the mandrel (22) and can be shaped into a hose which is open in the longitudinal direction and surrounds the outer skin, wherein the margins of the release film (88) butt against each other in the area of the underside of the mandrel (22), a hardening device (103), which surrounds the plastic pipe on the outside, is arranged following the guide and shaping device (99) for the separation hose; 103) has heat sources and / or radiation sources (104) arranged around the plastic tube (100), - The hardening device (103) has for the plastic tube (100) on a guide tube (109) whose inside diameter is at least approximately equal to the sum of the nominal diameter of the plastic tube (100) and twice the wall thickness of the separation tube, the wall at least in sections and / or area by layer is permeable to the heat or radiation emitted by the heat sources and / or radiation sources and which extends beyond the hardening device (103) in the pulling direction, its longitudinal extent being dimensioned to extend the plastic tube (100) to surrounds at least to that point of its trajectory, from which the outer skin of the plastic tube (100) has a sufficient • dimensional stability for the support of the plastic tube (100) on support rollers (111), the mandrel (22) ends at least approximately at the rear end of the hardening device (103), - To the hardening device (103) includes a curing line (112), the Wärmedärr oil devices (113) which surround the plastic pipe (100) outside, - Following the curing line (112) a pulling device (118) is arranged, by means of which the plastic tube (100) is movable by frictional engagement in the pulling direction, - Between the rear end of the guide tube (109) of the hardening device (103) and the pulling device (118) support rollers (111) are arranged, which are adjustable to the height of the underside of the plastic tube (100) and the plastic pipe (100) to the Pulling device (118) out, - Following the pulling device (118) is a separating device (125) is present, which is movable by means of a guide (127) in the direction of movement of the plastic tube (100) and by means of the plastic tube (100) into individual lengths (126) with a certain length is divisible, - The separating device (125) has a clamping device (128) by means of which it can be clamped during a separation process on the plastic tube (100), - The separator (125) has a return device, by means of which the separating device after completion of a separation process is moved back to its original position. 10. Device according to claim 9, characterized by the features: the connecting device (28) for the separating film (25) has an unwinding device (29) for an adhesive tape (31), - In the peripheral region of the edges of the release film (25), a pressure roller (32) is resiliently arranged, by means of which from the unwinding device (29) derived adhesive tape (31) to the edges of the release film (25) can be pressed. 11. Device according to claim 10, characterized by the feature: - The connecting device is alf. Ultrasonic welding device formed by means of which the overlapping edges of the release film (25) are directly connected to each other. Device according to one or more of Claims 9 to 11, characterized by the features: - The annular blade (41) for the synthetic resin layer for forming an inner skin is arranged on a guide device (42), by means of which the annular blade (41) in the longitudinal direction of the mandrel (22) immovable and in the normal plane to the longitudinal axis of the mandrel (22) movable is guided, - The guide device (42) has at least one guide roller, but preferably two guide rollers (156), which are supported on the separating tube on the mandrel (22) and the running plane at least approximately through the longitudinal axis of the mandrel (22) passes, wherein each other include an angle between C0 ° and 120 °, preferably an angle of 90 °, - The guide rollers (156) are arranged in a longitudinal portion of the mandrel (22), which is in the pulling direction of the plastic tube (100) before Mü-dung (39) of the feeder (33) for the resin for the inner skin located. 13. Device for the continuous production of fiber-reinforced plastic pipes, characterized by the features: - There is a Regalgatter (12) having a number of coils (13) with fiber strands (14) made of glass fibers, carbon fibers or textile fibers, - on Regalgatter (12) guide devices (15) for removing the fiber strands (14) from the coils (13) and for forwarding the fiber strands (14) are present, - There is a base frame (16) for the joint recording several workstations and devices available, in the initial region of the base frame (16) there is a supply device (141) for a plastic inner tube (140) by means of the plastic inner tube (140) in the alignment of the passage openings of the subsequent work stations can be fed to it, it is a feed device (142) for a Adhesive resin present, by means of a storage container, an adhesive resin in the back region of the plastic inner tube (140) is aufgießbar on this, an annular doctor blade (143) (annular doctor blade) is present which surrounds the plastic inner tube (140) on the outside and by means of which the infused adhesive resin can be shaped to form an annular uniformly thick adhesive resin layer, below the annular doctor blade (143) a collecting trough for the stripped amount of adhesive resin is arranged, there is a take-off device (144) for a nonwoven fabric (146) wound on bobbins (145) in the form of a random fiber fleece, there is a guiding and shaping device (147), by means of which the fleece (146) from the unwinding device (144) to the plastic inner tube (140) is hineinleitbar and is moldable to a longitudinally open tube surrounding the plastic inner tube (140) on the outside there is a pinch prong (148) by means of which the tube formed by the fleece (146) can be embedded in the adhesive layer to form an adhesive and buffer layer and at the same time the excess quantity of adhesive can be stripped off, There is a supply device (55) for an artificial heart, by means of which a synthetic resin in the back region of the plastic inner tube (140) is pourable from a reservoir, there is a guiding and shaping device (56) which surrounds the plastic inner tube (140) on the outside and by means of which the fibers of a number of Regalgatter (12) derived fiber strands (14) in the form of a closed frustoconical fiber cladding (59) to the plastic inner tube (140) are hindurchleitbar, there is a ring blade (61) by means of which the digested synthetic resin is moldable into a uniformly thick synthetic resin layer and by means of which at the same time the fiber cladding (59) can be embedded in the synthetic resin layer to form an axial reinforcing layer, it is a feeding device (55) for a Synthetic resin is present, by means of the reservoir from a resin in the back region of the plastic inner tube (140) is pourable, there is a ring-shaped bobbin (63) present, which surrounds the plastic inner tube (140) in the middle and which is rotatably mounted on a bearing frame (64) at the coil carrier (63) at least one coil (68) of a fiber strand (69) is rotatably mounted, the coil carrier (63) is coupled to a drive (65; 66; 67) with adjustable speed, on the coil carrier (63) guide devices (71) are arranged, by means of which the fiber strand (69) of each existing coil (68) to the plastic inner tube ( 140) is insertable and can be embedded in the synthetic resin layer during circulation of the coil carrier (63) to form a tangential reinforcement layer, there is a supply device (76) for a synthetic resin, by means of which a synthetic resin in the back region of the plastic inner tube (140) is pourable from a reservoir, there is a guiding and shaping device (77) which surrounds the plastic inner tube (140) on the outside and by means of which the fibers of a number of Regalgatter (12) derived fiber strands (14) in the form of a closed frusto-conical fiber jacket (79) to the plastic inner tube (140) are hindurchleitbar, a ring doctor blade (78) is provided by means of which the cast-on synthetic resin can be shaped into a uniformly thick synthetic resin layer and by means of which the fiber jacket (79) for B ^{: i can be} embedded in the synthetic resin layer; 76) for a synthetic resin, by means of the reservoir from a resin in the back region of the plastic inner tube (140) is pourable, there is a ring-shaped bobbin (81) present, the inner tube (140) surrounds the plastic and rotatably mounted on a storage rack is mounted on the bobbin (81) is at least oine coil (82) of a fiber strand (83) rotatably mounted, the bobbin (81) is coupled to an adjustable speed drive whose direction of rotation is opposite to that of the preceding bobbin, guide devices are arranged on the coil carrier (81), by means of which the fiber strand (82) can be guided from any existing coil (82) to the plastic inner tube (140) and can be embedded in the synthetic resin layer during circulation of the coil carrier (81) to form a further tangential reinforcement layer,
if necessary are still available, depending A liquid resin supply device (84), A guiding and shaping device (85) for guiding fiber strands (14) and for passing their fibers in the form of a frustum-shaped fiber sheath (86) for • plastic inner tube (140), An annular doctor blade (87) for molding the synthetic resin layer and for embedding the fiber sheath (86) in the synthetic resin layer to form a further axial reinforcing layer, • a liquid resin supply device (84), and A coil carrier (88) for forming a further tangential reinforcing layer, the direction of rotation of said coil carrier (88) being opposite to the direction of rotation of the preceding coil carrier (63), following the last bobbin (88) to form a tangential Reinforcing layer is a ring doctor (92) arranged by means of which an existing excess of synthetic resin is strippable, there is a supply device (94) for a synthetic resin, by means of which a synthetic resin for an outer skin of the plastic pipe in the back region of the plastic inner pipe (140) can be poured from a storage container, an annular doctor blade (95) is provided by means of which the cast-on synthetic resin can be formed into a uniformly thick synthetic resin layer to form an outer skin of the plastic pipe; there is an unwinding device (96) for a band-shaped separating film (98) wound on coils; there is a guiding and shaping device (99) by means of which the separating film (98) from the unwinding device (96) to the Kunststoffseineprohr (140) is hineinleitbar and is moldable to a longitudinally open hose surrounding the outer skin on the outside, said the edges of the release film (88) in the region of the underside of the plastic inner tube (140) dull clash, ^ following the guiding and shaping device (99) for the separating tube, a hardening device (103) is arranged which surrounds the plastic tube on the outside, the holding device ( ¹ 03) has heat sources and / or radiation sources (104) which surround the plastic tube ( 100) are arranged around, the hardening device (103) has for the plastic pipe (100) on a guide tube (109) whose inside diameter is at least approximately equal to the sum of the nominal diameter of the plastic tube (100) and the two-wall thickness of the separation tube, the wall at least in sections and / or area by layer is permeable to the heat or radiation emitted by the heat sources and / or radiation sources and which extends beyond the hardening device (103) in the pulling direction, its longitudinal extent being dimensioned to extend the plastic tube (100) to at least to that point of its trajectory, from which the outer skin of the plastic raw res (100) has sufficient dimensional stability for the support of the plastic tube (100) on support rollers (111), the plastic inner tube (140) terminates at least approximately at the rear end of the curing device (103) the hardening device (103) is followed by a curing line (112) having thermal insulation devices (113) surrounding the plastic pipe (100) on the outside, followed by the curing line (112) by a pulling device (118) by means of which the plastic pipe (100) is movable by frictional engagement in the pulling direction, between the rear end of the guide tube (109), the hardening device (103) and the pulling device (118) support rollers (111) are arranged, which at the height position of the underside of the plastic tube (100). are adjustable and carry the plastic pipe (100) to the pulling device (118) out, - Following the Zugvorrichtung (118) is a separating device (125) is provided, which is movable by means of a guide (127) in the direction of movement of the plastic tube (100) and by means of the plastic tube (100) into individual longitudinal sections (126) with a particular Length measure is divisible, - The separating device (125) has a clamping device (128) by means of which it can be clamped during a separation process on the plastic tube (100), - The separator (125) has a return device, by means of which the separating device after completion of a separation process is moved back to its original position. 14. Device according to one of claims 9 to 13, characterized by the feature: - At least in part of the supply devices for a liquid synthetic resin, preferably in all feeders (33; 55; 76; 84; 94) is the collecting trough (44) arranged below the associated annular doctor blade (41) via a return line (36) with the reservoir (34) connected to the feed device (33). 15. Device according to one or more of claims 9 to 14, characterized by the Characteristics: - The unwinding device (48) for the nonwoven fabric (51) for forming a support layer is equipped with two coil carriers, on each of which a coil (49) of a band-shaped web (51) is arranged, whose width is at least approximately equal to half the outer circumference of the inner skin . - The two coils (49) or at least one each guide for the unwound from them fleece are arranged on either side of the mandrel (22) at such a height that the center of the nonwoven tapes (51) at least approximately in the same horizontal plane as the longitudinal axis of the Dorns (22) is located. 16. Device according to claim 15, characterized by the feature: - The guiding and shaping device (52) for the fleece (51) has on both sides of the mandrel (22) each have a guide blade (161), the mandrel (22) facing inner surface (162) is concavely curved at least in its end , by means of which the nonwoven tape is deformable at least approximately to the lateral surface of a half circle cylinder. 17. Device according to claim 16, characterized by the feature: - The mouth (62 ') of the supply device (55) for the synthetic resin for the support layer in the region of the guide vanes (161) of the guiding and shaping device (52) for the fleece (51) in the longitudinal direction of the mandrel (22) at a Place arranged at which the mutually approaching edges of the two nonwoven tapes (51) just have a sufficiently large distance from each other. 18. Device according to one or more of claims 9 to 17, characterized by the features: - The guiding and shaping device (56) for the fiber strands (14) and the fibers for an axial reinforcing layer has a Leitkranz (164) and preferably a guide ring (165), both of which surround the mandrel (22) on the outside, - The Leitkranz (164) has a dor number of fiber strands to be supplied (14) corresponding number of through holes (166), which are distributed along a single annulus or along a plurality of centrally located circular rings and pulled through each one of the fiber strands (14) is - The guide ring (165) has an annular closed inner surface (166) whose inside diameter is smaller than the smallest circular ring of the arrangement pattern of the through holes (166) in the guide ring (164) and only slightly larger than the outer diameter of the moving through it layer structure for the plastic tube (100) is, 19. Device according to claim 18, characterized by the feature: the mouth of the axial reinforcing layer supply device (55; 62) is located in the longitudinal section just before the guide ring (164) or, preferably, in the longitudinal section between the guide ring (164) and the guide ring (165), the lead (62 ) preferably extends within the innermost truncated cone lateral surface, which is spanned by the fiber strands (14) running from the guide ring (164) to the guide ring (165). 20. Device according to one or more of claims 9 to 19, characterized by the features: - The supply device (55) for the synthetic resin for the support layer is dimensioned for a flow rate of the synthetic resin, which is greater than the flow required alone for the support layer and which is sufficient at least for the next axial reinforcing layer, preferably also for the first tangential reinforcing layer . - Accordingly, eliminates its own supply device for the resin for the next axial reinforcing layer and possibly also a separate feeder for the resin for the next tangential reinforcing layer. 21. Device according to one or more of claims 9 to 20, characterized by the features: the resin reinforcing layer supply device (76), which does not precede a backing layer, preferably also the delivery device for each additional axial reinforcing layer, is sized for a resin flow rate greater than that required solely for the axial reinforcing layer; which is at least sufficient for the subsequent tangential reinforcement layer, - Accordingly, eliminates a separate feeder for the resin for the tangential reinforcing layer. 22. Device according to one or more of claims 9 to 21, characterized by the features: - On the bobbin (63) a plurality of coils (68) are arranged evenly distributed, - Preferably, a braking device is provided for each of the coils (68), the braking force by means of a scanning device for scanning the outer diameter of the coil (62) is automatically adjustable. 23. Device according to one or more of claims 9 to 22, characterized by the feature: - Each bobbin (63) is coupled via a respective continuously variable transmission (65) with a common drive shaft (66) (Figure 4), which is mounted on the base frame (16) and of a drive motor (67) to all driven Extending devices (63; 81; 88). 24. Device according to one of claims 9 to 23, characterized by the features: for each of the fiber strands (14) for an axial reinforcement layer, an adjustable tension device is provided, by means of which the tension in the fiber strand can be set to a specific value, - Preferably, the clamping devices in the vicinity of the Leitkranzes (164) of the guiding and shaping device (56) are arranged. 25. Device according to one or more of claims 9 to 24, characterized by the feature: - The guide tube (109) in the hardening device (103) has a narrow longitudinal gap on its underside. 26. Device according to one or more of claims 9 to 25, characterized by the feature: - The guide tube (109) in the hardening device (103) is formed as a glass tube which is transparent to infrared light. 27. Device according to one or more of claims 9 to 26, characterized by the features: the guide tube (109) in the hardening device (103) is formed as a metal tube, which is preferably made of a low-corrosion and abrasion-resistant steel, ~ The guide tube (109) has a larger number of through holes, which are arranged offset to one another in the longitudinal direction and in the circumferential direction of the guide tube (109). 28. Device according to one or more of claims 9 to 27, characterized by the features: - The thermal insulation device of Aushärtestrecke (112) is formed by a number of covers (113) which are formed at least approximately as a hollow cylinder, and whose peripheral wall is formed thermally insulating, - The covers (113) are guided by a longitudinal guide (115) along Jem plastic tube (100) slidably. - The longitudinal guide (115) is preferably at least the length of a single cover (113) longer than the sum of the length of all covers (113). 29. Device according to one or more of claims 9 to 28, characterized by the features: the pulling device (118) is formed by two or more chain conveyors (119), which are preferably arranged in pairs diametrically with respect to the plastic tube (100), the chain conveyors (119) have roller chains (121) which are guided by guide rails (122) at least in the pulling run, - The roller chains (121) are equipped with angle tabs on which driving lugs (123) are attached, which are made of an elastomer. 30. Device according to one or more of claims 9 to 29, characterized by the features: - The clamping device (128) has two pairs of jaws (129), of which one jaw pair before and the other jaw pair behind the cutting tool (132) of the separating device (125) is arranged, - The jaws (129) are preferably actuated by means of pneumatic piston actuators (131). 31. Device according to one or more of claims 9 to 30, characterized by the feature: - The return device of the separator (125) has a pneumatic piston drive. 32. Device according to one or more of claims 0 to 31, characterized by the features: - The mandrel (22) has a plurality of cylindrical longitudinal portions whose outer diameter of the holding device (21) is gradually reduced, a transition point from one diameter step to the next is located in the direction of movement of the plastic tube (100) immediately adjacent to the winding point of the fiber strand (69; 83; 91) for a tangential reinforcing layer, - Another transition point is in the range of the hardening device (103). 33. Device according to claim 32, characterized by the features: - The mandrel (22) is composed of several independent individual pieces, which are preferably connected by means of a respective threaded connection releasably, - The joints of the individual pieces are preferably at the transition points from one diameter stage to the next. 34. Device according to claim 32 or 33, characterized by the features: - In the initial region of the dome (22) is a connection for a compressed gas, in particular compressed air, is present, by means of which a standing under a certain pressure gas in the interior of the dome (22) can be introduced, on the spine radial through-holes are present at several points of its longitudinal extension, extending from the interior of the dome to its outer side, the pass-through holes are preferably located on at least part of the crossing points or in the vicinity of the crossing points, Preferably, the through holes are formed by radial recesses in the end face of the individual pieces of the mandrel (22), - At the junction and at least in the area after the last through hole a bulkhead is ever present, which closes the interior of the mandrel (22) to the outside. 35. Device according to claim 34, characterized by the features: the interior of that length portion of the mandrel (22) situated in the region of the hardening device (103) is closed off from that of the preceding length section by a bulkhead wall, - This length section has a connection for a arranged in the interior of the mandrel compressed gas line, the positive pressure is set higher than the positive pressure in the preceding lengths of the dome. 36. Device according to one or more of claims 9 to 35, characterized by the features: - The edges (172) of the side cheeks (173) of the guiding and shaping device (99) extending from a above the plastic tube (100) located inlet shoulder (174) for the release film (98) in the longitudinal direction of the plastic raw res (100) around this steadily toward each other and approach each other in the vertical meridian plane except for a very small residual gap (175), - The side surfaces (176; 177) of the edges (172) of the side walls (173) at least in the region of the residual gap (175) from the inner edge (178) to the outer edge (179) towards apart at a certain angle, in the vicinity of the guiding and shaping device (99) a ring doctor blade (101) is arranged, which is not completely closed but has a residual gap (182) in the vertical meridian plane at the bottom, - The side surfaces of the residual gap (182) of the annular blade (101) run from the inner edge (178) to the outer edge (179) out at a certain angle apart. 37. Device according to claim 36, characterized by the features: - In the direction of movement of the plastic tube (100) behind the annular blade (101) a scraper (185) is arranged, the scraper edge (186) is matched to the plastic tube (100), - The collecting trough (102) below the annular blade (101) extends on the one hand into the region of the scraper (185) and on the other hand into the region of the guiding and shaping device (99).