DE1942006A1 - Process and system for the production of plastic pipes - Google Patents

Description

■ '«' lsi'TEf

PATENTANWXLfL

DIPL..ING. H. LEINWEBER dipl.ing. H. ZIMMERMANN

Potlichedc account: Bank account: Telephone ΤβΙ.-Adr.

Munich 22045 Dresdner Bank ag. Munich (0111) 2619 »9 lelnpat Munich

Munich 2, Marlenplatz, account no. 92790

Z / Va / Kg 8 MUnchen2, Rotental7 _t 2nd AUf ₀ .

(Kustermann Passage)

August 13, 1969

Carlos FRADERA PELLICER and Mario FRADERä PELLICER, -Pamplona (Navarre), Spain

Process and installation for the production of plastic pipes

The invention relates to a method and a plant Manufacture of plastic tubes that have no disadvantages of the conventionally manufactured tubes on iron.

In known methods, such tubes are made in a single operation, i.e. resins and fiber materials are sprayed or injected into the mold at the same time, creating a mixture in which the disordered Fibers are bound by the resins, so that the tubes through the fiber parts protruding from the resin composition a have a rough surface.

This disadvantage is increased by the fact that the fibers protruding from the resin prevent moisture from penetrating favor through the pores, especially when you consider the different coefficients of expansion of the above materials takes into account, creating passageways for water and other liquids as a result of temperature changes which more or less deteriorate the properties of the tubes.

In addition to this destructive effect, the tubes in question are also subject to other disadvantages, such as

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Changes in clearance, longer manufacturing times, limitation of the maximum inside diameter, slow machine operation and other minor disadvantages.

The inventive method is characterized by that it comprises a plurality of interrelated phases, in which a rotatable. Rohrfor ^ successively concentric Layers -be injected, the first of which is based on synthetic ^ resin, at least one of which is based on the Based on a mixture of resin and staple glass fibers serving as reinforcement, and finally from a layer another synthetic resin-based layer is followed, the individual layers by greasing the properly aligned fibers are firmly connected to one another. Here you get drilling through limaterial in it ohrformern, in which they are held in place by centrifugal force until they are too hard will"

In aeia method according to the invention to produce In a first phase, drilling will include the associated materials, such as catalysts, accelerators, fillers and dyes, containing resin layers are injected into the fort,? / o they gelled and begins to polymerize, I-ch this becomes a second layer in which the resin is a mixture of glass fibers or the like Has material in stack form, which is in the Fon. brought in is sprayed with resin by the rotary motion of the fora will. In a third phase, another layer of resin is applied, which, depending on the intended use of the tube, is the same as the has different qualities like the first layer, so paso after polymerizing these layers, a tube is obtained which forms a unified body.

The glass or similar fibers are flung out in the fora before they are embedded in the resin. They will "'■ deposited in the mold in helical _stripes% wherein the glass fibers = by its own centrifugal movement auejj & ricir ** * **% ζτ -, so that the Eöhre a high mechanical strength" rbält the.

BATH ORIGINAL

The layer of reinforcing material may itself a 'second layer (in the center or elsewhere) of a material HIIT other for the end use of the liöhre appropriate PHY \ sical properties, for example, a} normal or porous-cellular polyurethane resin in the form of a flexible foam or the like.

In other cases it may be desirable to have a resilient Layer, for example for damping and absorbing, possibly on- ' occurring expansion or contraction effects as well as Liechani

Impact stress or the like., Between the innermost layer |. the tube and the layer adjacent to it or in any [ different arrangement between the layers after using the height ·· ' re to provide. * 'I.

Tubes the erfindungsgeiiiässe plant for manufacturing plastic-4 has to perform aer individual process steps in \ essentially the following devices: a device for Zufüliren drained amounts of material, performing for mixing the group consisting of resin and the associated substances materials, a crushing device of the reinforcing fibers, a device for injecting the mixtures, a device for moving the injection device along the inside of the

Forij and a device to move the mold laterally. «

The device for supplying measured quantities of materials consists of precision measuring instruments and a suitable pipeline ^ nets, through which the resins and associated substances in the for each component required amount is fed to the mixing container weraen.

The mixing device for the resin and the ingredients has öinet; lvohr ..; ixer, into which the resin aer catalyst aer Beaciueuniger, ale fillers and dyes are poured "All of these substances by weraen show fine, circular cone, or other agitation means uu _ö erührt to give a homogeneous; Mass produced by v / earth through openings in a pipe on the ground 'j

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BATH ORIGINAL

aes Liischbehälters conveyed out and axially inserted into the fora will. ! The fillers can be placed in a filling vessel, such as a converter, which is connected to a line to the mechanical, - pus provided i & t. -

Lie device ZUB] Crushing the reinforcement drenen-äaen Glass or similar fibers have some rotary cutting tools that are housed in a suitable container, j from which the fibers are thrown into the mold.

• The device for injecting the materials into the mold consists of a head with axially arranged pouring holes, which can move within the mold in order to deposit the materials along its passage. <

Lie device for moving the ilin injector or | The movable head consists of a bench that supports the various j which means to prepare the material for the tubes and those on a fixed one. Support frame is slidably attached, aer with appropriate drive and transmission means for the aforementioned locomotion is provided.

Lie device for moving the molds sideways has several sets of belts adjustable in their distance from each other-} · slice up, the back and forth movements and a lateral push as well as a corresponding movement of the form into a new one Cause position and the appropriate connection with the -drive device transmit an equal movement to the molds during the formation of the tubes,

The device may also have adjustable components for holding shapes of various sizes from several roles exist, which are located in a ribbon that is wound around the respective shape.

The shafts of the crushing rollers for the reinforcement (glass or other) fibers run parallel to the mold axis, on aer you work. ^ -

BATH ORIGINAL

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The system can have one or more injection devices, which can be arranged in any desired manner in the work area
could be; speed achieved a greater Arbeitsgeschwin- · to this "" -is else. . -

The tube obtained according to the invention has a plurality concentric layers of which the inner and outer are made of a synthetic resin, while the intermediate layers from a mixture of resin and crushed glass or similar fibers are composed, the layers being homo- ' gen and compact with smooth surfaces sinci. ;

Further details, advantages and features arise; from the following description. In the drawing, the inventions i is dun _6, for example, illustrates, and show namely

Fig. 1 is a side view of the filling system and the
i.laterial injection device for molding
Drilling according to the invention,

Fig. 2 is a front view of the system shown in Fig. 1,

Fig. 3 is a side view of the central part of a
. Removing modified from that shown in Fig 1 _e

leadership style, ■!

and 4a schematic representations of the mixing! and measuring device or a modified one; Shape of the stirring mechanism,;

a front view of the mechanism for lateral displacement of the molds during the l successive manufacturing phases, j

a top view of the mechanism according to |

Fi - ^r ) i

Fig. 6

Fig. 7 is a schematic representation of the application
the reinforcement in between

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position of the hoe when it is already seasoned outer layer and before applying the inner Layer,

8 shows a longitudinal section through part of a shape and the pipes obtained from it,

9 shows a perspective view of the rt-ues "luibrin" ens the reinforcement layer within the foriii,

Fig. 10 shows a longitudinal section of the shape and the tubes produced as well as a visual representation of the performance of a, stripping of the shape ... , oie in turn on an independent _fc i _L en L en several or fixed i'r ^ er and ■ rransoortvorrichtun ^ Lefejti ^ j,

Fig. 11 is a view ahnIiυπ Fig. 1 "afc afor a modified ausführun _£., Of the 'wakens uno its i'citigeeit,

12 is a sectional view of a detail of a neiLjable Foruiverschleckels,

12a shows a quarter of the front view of the closure decicle according to Fig. 12,

FIG. 13 is a sectional view similar to FIG. 12 of a discussed one iiusführungforiij of the cap,

13a is a view similar to FIG. 12a of the modified one üusführungforiii,

FIG. 14 shows a further modification of that shown in FIG Contraption,

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Fi _& . 14a a half front view of the embodiment shown in FIG. 14,

15 shows a plan view of the entire inventive nozzle system, and

FIGS. 16 and 17 show details of the embodiment shown in FIGS. 5 and 6 , respectively.

Dab inventive method by means of a LinspritzDyste.jü, a drive system, a Zentrifugalsysteajs, a For ^ s \> eisungssyste: or iiusziehsysteu, iS and a waste, s performed.

The Jiiinsprit'zsysteui results from the in Fig. 1 shown machine, which * consists essentially of a ^ fixed iiahijen 1 for a movable »days 2, which has a chassis 3; carries that ent- the feeding device for the shaping of drilling. ; stop. ". I

The tap 1 has feet 4, a bar 5, lower Füh- | run ^ s rails 6 and upper Fülirungsschienen 7 on. iiuf dok Rahiaen! siuu a. & IeK.tr cui ο tor S and transmissions 9 attached. In other cases, as shown in FIG. 3, a Kiek- i trouotcr 10 lit a gear 11 is provided instead, which ijit a toothed | rod 12 or a screw (not shown) in engagement | represents. ■:

liacli Fit .. 1. Has the movable na _fe en 2 supports 13 and ^ u er beams 14 -ui, üie a \ h chassis 3 is attached. This chassis enters a λοΙίι 1d, which contains pipelines 16 which lead the materials to ... .iti-L-parts of the plastic pipe. This ear ends in a phrase formed by, eineüj kischKojjf 2ü. The chassis ό Trigt further comprises a hopper 21 eine.Halterung 21 ', a actuating device 22, coil iit de ^ reinforcing thread j 23 which is held in suitable guides, and a Deitung j 24 sum conveying the material vc "hopper 21 to ^ Lischko ^ f 20th j

The forward and stooping movements of the Viagens 2 were made by the ^; via a -antriebsiienienscheibe 26, an animal 27 and a fs

009809/1547 "° ~ ^!

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Counter pulley 26 with a friction gear 25 connected to motor 3 and "driven by the transmission 9, which have a primary sprocket 29 and secondary sprockets 30 with chains 31 and 32. The carriage moves between the guide rails 6 and 7 on baths 33, 34 and 35 *

In another embodiment according to FIG. 11, in which the same reference numerals as in FIG. 1 are used for the same parts, the carriage 2 consists of supports 13 which extend upwards #u side parts 14 ^f , which are fixed to the chassis 3 are connected. The question is about the gear 11 or another suitable mechanism that interacts with the rack 12 or other fixed parts of. Electric motor 10 set in motion which is guided by wheels 33 and 34. ι

20 i

Fig. 4 shows the mixing head ⁷ , which has a container 36),

in a conduit 37 for the resin, a second conduit j 3 <3 for a catalyst, a "further conduit 39 for the [fillers and, finally, a conduit 40 iLÜnaen for a solvent which is used for cleaning, if the Mnspritzphase is completed Furthermore, a pipe 42 for special hares in connection with a further pipe 43 for a corresponding catalyst or other pipes, such as Gie pipe 41, are provided for cases in which additional chemical stabilizers or chemicals producing special properties are required 45 carries blades 46, which cause the aforementioned materials to be processed. The blades 46 are replaced by smaller cutting devices, for example two conical stems 46a (FIG uses »veraen. -

in the lower part aes Liischi. . _L iü 20 arranged iiohr the ii. Container 36 produced resin material 51 and conveys it through a few openings 52 at the same time with the comminuted fibers 53 thrown in at the same point into a

009809/1547

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Form 5ό. The materials constituting the resin mixture 51 are measured: by precision measuring instruments shown in one of Fig. 15; apparent associated housing 111 are housed. ;

iig. 5 and 6 show the centrifugal system, which a centrifugal. fuge has ordered the ^r of a drive head 55 and a guiding head 56th The drive device has an electric; Variator 57, which transmits the movement to the mold 53 via a belt j 59 which is attached to pulleys 60 and is kept in tension by I another pulley 61 which
in turn adjustable by a control device 62 for regulating the tension of the belt in order to bring it to molds; to adapt to different diameters. This pulley unit, mounted on a rocker arm '63, is driven by a hydraulic | advertising driven cylinder 64, enabling the tensioning of the belt and the j insertion, centering and üusstossen the mold 58 UEN]. The tilting arm 63 pulls the control device 62 with it, which in turn is connected to a tensioning arm 65 which is firmly connected to the j liiji-VdiTiu 63. j

The mold 58 is also guided by wheels 66 which on; a plate 67 are arranged, which extends upwards and downwards
can move to adapt to the diameter of the respective shape. This entire drive unit is arranged on a bench 68, j

The guide head of FIG. 6 has the same kinematic {see construction as described above, with the exception of the belt Ί 59, the control device 62 for regulating the voltage,
ueu SpannarjüS 65 and the electric variator 57.

Fig. 6 also shows feeds for hot air or others
Gas in a movable nozzle 70 and an infrared heater 71] jiiiui accelerating the polymerization of the material. This Jfirhitzoij Grfülgt depending on the type of oil used and with the for
uioaöü resin suitable gases (if necessary) to prevent surface damage or uuu polymerization
to activate.

J (L,

009809/1547 ^

BATH ORIGINAL

16 and 17 show another embodiment of the centrifugal system, which comprises a centrifuge consisting of a drive head 125 and a guide head 126. The mechanical drive device has an electrical variator 122, which transmits the movement to the form 53 via a belt 129 which runs around belt pulleys 130 and is kept in tension by a further belt pulley 131, which in turn is regulated by a control device 132 The tension of the belt is adjustable in order to adapt it to forcing with different diameters. The tight on a swivel plate 133 th belt pulleys are adjusted by a hydraulic cylinder 134, whereby the tensioning of the belt and the Mnoetsen, centering and pushing the mold 55 enables 7 ^,! earth. The movement of the pivot plate 133 pulls a control device 132. ,, it. The mold 58 is also guided by wheels 135, which are fastened to a latte and can be moved up and down to be placed on a jevreili ^ en for ^ bylijesser. Li-. ^ GanLv ^ drive device .is attached to a spell 137. L * er * ühruii ^ oKOjjf 126 v; eist üen the same above-mentioned kineL.atic üUfc-au suf, with the exception of the belt 129, the control device 132 for aao regulating the tension of the belt and the electric v ^ riator 128. Also Here, feeds for hot air or other gases are provided in a movable nozzle 13o and infrared heater 133 to accelerate the polymerization of aes uacerials, this heating is depending on the type of resin used and, as far as possible, suitable gases for the resin ^ efü-rt to avoid surface damage or to activate aie loijfflerisaticn, Fig. 16 shows the feed oyste ^, for the centrifuge, which has bars 140 and feet 141, tuf '.tt-n bars 140 processing devices are attached, the av -:> üeL turning aex Fon.1 58 serving rollers 142 consist, aie uü eiü = .-;, .. ivijjparo 143, which is used for inserting, centering and removing the form 58. All these parts are made by aüki \; aohalter, electronic time and autoiiiationscircuits üoyie uie en type: ο, 'ϋοή-

009809/15 * 7 bath

The necessary hydraulic and ineu ^ atikcylindei are driven and operated by an electric motor 144, whereby the foru is rotated. Finer pass oie rail 140 L.it guides 147, uie ;; iteinanaer aligned UNU appropriate centering and ■ iiiiistellijittel 14B for aie form jj ^l comprise üie ".it eineiii crown wheel \ j'ö is connected, the -eul" Centering of the foru in an axial direction, in the guides 147 and the centering means 148 engaging.

A heater 161 is located in one of the openings of the type described above.

009809/1547

rtUf the bar 140 sina, as described above, the! great 142 unu Klppari-c 143 disordered. The whole feed system is completed by: vei Viagen 145, 146, which are connected to one another by a synchronized pulling device, so that both levers, jjieoe ', hunt 14 ^ and I46 move at the same time by means of a screw 15I, and one by one ,., xjiektroijotor 152 driven v.iru, in guides 14 ^ 'and 150. Le i.agen are passed with a lifting device, through the ede forn-en 5ü uit the help of supports 153 and 154, which hold the un their-ends , on and ;' ab \, urtsbev; r _u t '/, can order.

Ik. s feeding zuiu Zentrii'u ^ enkv / fv / iru by conveyance ', J the «Foi .. Littelj a pulling device caused by driving! -, gen I55 unu eiüor over the guide ^ eu 1 ^ 5 running enallose chain- · - te 156, the. -ame 157 ^ it on their and s attached rollers 13: · richt, uie uie fon .. 5ö on the To push the centrifuge _{ku r} f and bring it into position, by the already mentioned., Ültei zü'riert r, iiu.

Kac :. 5t3wi; ui _o un ^ des centri: u _ .: C2'ens give the centering ^ '... ittei uie; · \ τ: ju free, the. _{; J} it Hi ..io Jer same endless chain i5i ..it .ii: ^ .. to his ... i ^ nde ..I: heal 16G provided ^ r. _u 159 ₍ . uc? nl ^r eleY.ageii: -j _o efüiirt v; iru. V. if it is at the level of these sagas i _{i: t} 14? ULV. \ 4o , '> viro they are raised by these and over the .j \ j ■

BATH ORIGINAL

Located in the positions C and B forms 58 away to the Machining device in position A where it is conveyed to the rollers 142 remains. Simultaneously with this transport process the Porrrj in position C is transported to the centrifuge head,.

The same carriages 145 and 146 can be used to lift the molds from the floor onto the beams 140 by arranges the car in position A in Fig. 16 and with means 1§2 to carry out this work connects.

The feed device for the centrifuge shown in FIG. 5 has upper bars 72 ′ and lower bars 73, which are connected to one another by webs 74. The upper beams 72 are provided with machining means consisting of rollers 75 which are used to rotate the mold 58 and which are mounted on a rocker arm 76 which. the insertion, centering and removal of the mold 58 allows. The whole unit is controlled by microswitches, electronic timing and automation circuits and the corresponding hydraulic and pneumatic cylinders, and is driven by an electric motor 77 to rotate the mold.

As Fig. 6 shows, on the beams 72 and lifting devices 80 and 81 of the feed system of the centrifuge and on the Centrifuge itself aligned guides 81a arranged so that they iiiit centering and adjustment means 81b for the Forms 58 interact. The shapes are with face gears 93a which cause the centering of the mold in the axial direction by the meshing of the guides 81a and centering means 8Tb.

In one of the mold openings there is a heater 78 above described arranged.

Processing means 79 are similar on the lower beam 73 those attached to the upper beam 72. The whole feed system is completed by the two lifting devices 80 and 81, of which the lifting device 80 removes the molds 58 from the un-

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BATH ORIGINAL

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lower bar 73 transported to the upper bar 72, while the zv / ei-r te lifting device 81 transports the molds from the upper beam 72 to the centrifuge and the lowering to the lower beam 73 ηael Completion of the process causes * from where the forms are d The tendency to use the processing equipment on the bar is conveyed will. _ "- '" ■ -.

7 shows a section of a tube 82 obtained with the device described above, which consists of an outer layer 83 of resin or a resin mixture, a middle layer 84 of the comminuted glass or similar fibers mixed with the resin mixture 51 53 and consists of an inner layer 85 made of resin or a resin mixture;

The mixing head shown in Fig. 7 20 which is initially located at · inlet of the cylindrical tubular mold 58, brings \ the resin mixture 51 to the inner surface of the mold, where it forms the Schicjht 83 under 'by the rotation of the form of centrifugal force caused and is held on the inner surface of the mold. There-! after ^ the second layer 84 is produced, which consists of a mi | consists of glass fibers or some other reinforcing material to which said impregnation is applied, the sulfur fibers being aligned in the longitudinal direction by their own centrifugal movement; The fiber layer is given a helical arrangement by rotating the fora 58 and simultaneous feeding through the mixing head 20, whereby the resulting tube has a high degree of mechanical strength mixed layer is applied to which it adheres, or rather when polymerizing in close contact iuit the mixed layer which is in an advanced state of gelling is firmly bonded with this.

The chassis 3 shown in Figs. 1 and 11 moves ir Longitudinal direction and conveys the mixing head 20 to carry out its work function from one end of the mold 58 to the other unc

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BATH

then back again. Flaps or partial closure covers 90 appearing in FIG. 8 are at both ends of the hair dryer ;; intended and serve to hold the hole 82 in the foriü 58. The Rökren 82 are freed from the forin by a trigger device shown in FIGS Outer crown gears 93 of the form 58 suitable professional beams 92 is provided and with a stripping device 94 in such a manner zuaiii- " Nienv / irkt that the trigger device 91 holds the fory 58, while the stripping device by a plunger 95 die-tube 82 moved axially forward, which frees it from the fora /

Fig. 12 shows an embodiment of the mold 58, which is attached to each -. End is welded to a crown gear 93 into which pins 98 are screwed, each engaging in slots 99, whose Ends 99a ... have a larger diameter; so that-, they of the heads of the pins 98 can be penetrated. These slots are made in a King 100 made of a corrugated metal strip., in which the y-ellipses or parts thereof, which are of farthest away from the opening of the shape, the narrow one Parts of the slots correspond. :

A cover 96 for partially opening the opening of the mold 58, the inner side 97 of which runs obliquely to the mold, to a To prevent the material that has been introduced from flowing out, is attached to the respective end appropriate means is effected.

In order to produce a fastening stop, spacer sleeves 101 are arranged and to prevent the ring 100 from falling off when it is removed To prevent cover, head pins are provided, the shafts of which penetrate the ring 100 through slots 102 and äru Cover 96 are attached without this η cht shown ■ Pins impede the rotation.

Fig. T3 shows a modification of this -'iusfülirungsf orm, at each crown gear 93 has a slot in which a veran-

009809/1547 bad original ^: λ

kerungsbaken 103 can engage under the pressure of a spring 104. ' The other end of the hook is provided with an actuating head 105. The whole device is fixed in one unit with the cover 96 housed connected housing in which they rotate freely can, whereby the cover 96 is placed on the Forin 58 and j can be removed from it.

Fig. 14 shows yet another embodiment in which! the removable connection between the cover 96 and the form 58 ^! from broken ü-frofilringen 106 is, the appropriate Hal-j TE and adjusting means 1 »O7 comprise the setting up and _ex: take the lid 96 allow. ^!

15 shows the system according to the invention with a group of containers 1OS ₁ , 109 and 110 for storing and homogenizing the bohi material, furthermore with a housing 111, which contains the precision measuring devices for the soy material and the measuring device for the, contains the necessary chemicals as well as the containers intended for the latter and the associated control and safety devices. The system also has a console 112 for programming and controlling the device, an injection system 113 and 114, a centrifugal system 115, a device 116 that heats the gas and brings it to a required state, and a stripping and pulling device 117 and 114 respectively. 118 on. The device 118 consists of a peeling bridge 119, a bathing device 120, an uransportwagen 121 and a box 122 for controlling and programming a device.

The I tubes 62 show in comparison to the known through Spray or thread winding produced drilling unique

eats itself, which reduces the strength of the material, ■ because it becomes brittle. The spray method also creates harmful ones Vapors * The mixture of resin and ingredients is poor and deteriorates the quality of the product. The spray guns have to be cleaned constantly, as the material in them is poly-

. . fr

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BATH ORIGINAL

_ 16 - 1942008

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merized. There is no precise mass for the layers in the tubes. The reinforcement material is not embedded properly. The resin polymerizes between 23 and 30 ⁰ C (shelf life in the container), which means that it can only stay in the container for a short time. The resin has to be sprayed on from the smallest distance, which limits the diameter of the pipes to be produced i The simultaneous spraying of resin and reinforcement material is thrown against the inner wall and from there bounces back against the spray head, which it envelops, eddies are created in the. Form evoked. The flow rate of the material is siniiaal and the production is unprofitable; The addition of fillers that damage the spray nozzles through abrasion is not permitted. The reinforcement material is not aligned and is distributed irregularly, which affects the strength of the finished tube. \ -

. In comparison to this, the tubes 82 produced according to the invention have a high degree of strength and evenness, their walls are smooth and lively and show no defects in density as a result of capillary effects and other indentations, as explained at the beginning of the description *

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Claims (1)

Claims: ■ j ι Process for the production of plastic tubes, marked j is characterized by a multitude of interrelated phases in which to manufacture tubes (82) by depositing { of material in ßohrforiaen (58), in which they by the centrifu-j gaXkraft can be held until it hardens, into the rotatable 1 Rohrfürm (58) one after the other concentric layers (83, 84, 85) { arranged by injection, the first (83) of which is made of synthetic resin (51), composed of at least one a mixture of resin and reinforcement serving crushed Glass or similar fibers (23; 53) consisting of a layer (84) and finally followed by another layer (8§) of resin the individual layers by embedding the orderly aligned fibers are firmly bonded together. 2. The method according to claim 1, characterized by the the following process steps; Introducing a layer (83) of resin with the associated materials, such as catalysts; Accelerator, Fillers and dyes in the form (58) in which it gels and begins to polymerize; Applying a second ' Layer (84) in which the resin is coated with glass or similar fibers; is mixed, which is embedded in the mold by the rotational movement of the mold being sprayed with resin; Application of a further layer (85) of resin of the same or different types Quality as the first layer, depending on the intended use of the Tube, whereby.the tube after the layers have polymerized forms a unified body. . 3. The method according to claims 1 and 2, characterized in that that in the form '(98) - introduced glass or similar Fibers arranged in helical strips prior to embedding by the rotational movement of the mold and used to create a high mechanical strength of the tube (82). BATH 4. Plant for the manufacture of plastic pipes, characterized by a device (111; 16, 21, 24) for supplying discharged quantities of materials, through a device (20) for mixing the materials consisting of resin and associated substances, through a device (47 , 48, 49) for shredding egg reinforcement fibers, by a device (113, 114) for injecting the mixture, by a device (2, 3) for moving the injection device along the "inside of the mold. And by a device ( Fig. 5, 16) for moving the forces laterally to carry out the various process steps. 5. Plant according to claim 4, characterized in that / the device for supplying measured quantities of i.teterials from precision measuring devices (111) and a pipeline network (16) for Supplying the resins and associated substances in precisely measured quantities to the extinguishing device (20). 6. Plant according to claim 4, characterized in that _; the device (20) for mixing resin and associated substances has an axially insertable mixer (36) for receiving the resin, the catalyst, the accelerator, the fillers and colorants, and a rotary mixer (46) I% elstumps (46a) · or other stirring devices to stir the substances into a homogeneous mixture (51) and a drilling line (50) at the bottom of the mixer, which is provided with openings (52) for introducing the mixture into the mold. 7. Plant according to claim 4, characterized in that the device for comminuting the glass odei (similar reinforcing fibers (23) has rotatable cutting tools (48, 49) which are arranged in a container (47), from which the fibers in the form (58) arrive. · 8. Plant according to claim 4, characterized gekenüzeichrjet that the device for introducing the material into the mold (5B) has a head (20) with axially arranged pouring holes (52), the one for applying the materials along its path iii; Inside the Mold (58) is movable along the inside of the mold. 009809 / 1SU. _BADOR1QINA L ¹⁹ "' 9o system according to "claim 4, characterized in that the device for moving the injection head has a bench on which the various devices for preparing the, materials intended for the manufacture of the tube are arranged and which can be moved along a fixed carrier frame (1), the laitjden associated drive and transmission means for this movement is provided. 10. Plant according to claim, characterized in that the device for laterally moving the mold further has a number of belt pulleys that can be adjusted in terms of their distance from one another, from generating to-and-fro movements to the side Moving and transporting the form into a new position is determined are and flow through their connection with the drive means this movement nourishes the making of the drill on the molds transfer. 11. Plant aaoii claim 4 »characterized in that adjustable jigs (59 Ms 65; $ 133 to $ 136 for holding of shapes aii verso each diameter are provided, which in have balls arranged in a band surrounding the respective shape. BATH ORIGINAL - '' 15AX -. — __ -. J *