EP1308254B1 - Apparatus for the production of concrete pipes - Google Patents

Apparatus for the production of concrete pipes Download PDF

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Publication number
EP1308254B1
EP1308254B1 EP20010126084 EP01126084A EP1308254B1 EP 1308254 B1 EP1308254 B1 EP 1308254B1 EP 20010126084 EP20010126084 EP 20010126084 EP 01126084 A EP01126084 A EP 01126084A EP 1308254 B1 EP1308254 B1 EP 1308254B1
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EP
European Patent Office
Prior art keywords
tool
moulding
cone
axis
rotation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP20010126084
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German (de)
French (fr)
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EP1308254A1 (en
Inventor
Torsten Benzin
Helmut Kuch
Jürgen MARTIN
Jörg-Henry Schwabe
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Institut fur Fertigteiltechnik und Fertigbau Weimar eV
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Institut fur Fertigteiltechnik und Fertigbau Weimar eV
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Priority to EP20010126084 priority Critical patent/EP1308254B1/en
Publication of EP1308254A1 publication Critical patent/EP1308254A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00Methods or machines specially adapted for the production of tubular articles
    • B28B21/02Methods or machines specially adapted for the production of tubular articles by casting into moulds
    • B28B21/10Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
    • B28B21/22Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts
    • B28B21/24Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts using compacting heads, rollers, or the like
    • B28B21/26Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts using compacting heads, rollers, or the like with a packer head serving as a sliding mould or provided with guiding means for feeding the material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00Methods or machines specially adapted for the production of tubular articles
    • B28B21/86Cores

Description

Field of the Invention
The invention relates to a shaping device for producing pipes from a concrete batch, comprising a jacket shape for shaping the outer contour of the pipe and a multi-part tool connected to at least one drive device for compressing the concrete batch filled in the shaping device and for shaping the inner contour, with a first Working area section of a first part of the tool and a first working area section of a second part of the tool there is an intermediate space for the passage and compression of the concrete mixture and a second working area section of the first part of the tool for shaping the inner contour has the shape of a first outer cylinder about the axis of rotation of the first part of the tool having.
State of the art
Vibratory processes are usually used to manufacture pipes from concrete used to compact the concrete. This is done in a vertical Intake form, the walls to shape the outer and inner contours of the Pipe has fresh concrete poured into the space between these walls, which is continuously vibrated. About the vibrations To generate, one or more vibrators are used, mostly in the interior the recording form are arranged. According to the large mass of Such a vibration system must be able to manufacture the entire pipe To set the mass of the concrete quantity and the shape of the receptacle in vibration, which is associated with high energy consumption. Add to that a considerable Part of the energy is lost because it does not vibrate in the optimal way Frequency range, but in bending vibrations, causing heat and noise acoustic vibrations is converted. Such vibration methods are therefore noise and energy-intensive, which is caused by the production of concrete pipes combines these procedures with high costs and also health risks.
Another disadvantage of such methods is that the quality of the compression varies can be if the vibrating device with a constant supply of concrete is in operation: Since the one filled in first, located at the lower end of the mold Batch is exposed to vibrations for a longer period of time than the later filled the compression at the lower end is higher, which leads to different material properties leads inside the tube.
An improvement in energy consumption and uniformity of material properties can e.g. achieved with the arrangement described in WO 92/18307 be, which also uses a vibration process and against each other there are movable inner and outer shaping elements, however actually only the inner shaping elements are moved while that outer element corresponds to a casing. The vibrations are in one Vibrating head of an inner shaping element generated and on a narrow Area limited along the pipe, which in the course of the concrete supply along the Axis of the tube is shifted. To generate the static pressure required for Compaction is necessary, the upper part of the vibrating head has a helical shape and conical shape, and by rotation the batch coming from above transported downwards and due to the taper also the static pressure generated. The compression itself is then achieved through the vibration.
However, the arrangement described in WO 92/18307 also shows the next one State of the art, disadvantages: Here too, vibrations, the generation of which is associated with high energy expenditure and noise, for Compression used. The stress on the material of the shaping device is also relatively high because it is in part of the inner shaping element coupled rotation and vibration movements occur in other parts only Rotations. Due to the construction, the top end is also manufactured a tube usually provided with a tip end contour with difficulties connected. Because the screw-shaped vibrating head towards the end of the manufacturing too If a part protrudes beyond the end of the mold, it is questionable whether it is for compression required static pressure corresponds to that used inside the mold, because not enough concrete can be refilled from above. moreover the inner shaping element can only be laboriously opposite to the production direction be removed again, and possibly material from the Remove the inner contour of the pipe. It is also not for the production of Continuous tubes suitable.
Another arrangement for the production of pipes from concrete is in the Patent specification DE-C-623 264 described. The concrete quantity is fed from above by a screw conveyor a guide is surrounded. Through the screw conveyor it gets down led into a jacket shape. In the mantle form is replaced by a displacer has the shape of an outer cylinder, shaped the inner contour of the tube and that Smoothed concrete quantity. The guide in the form of a hollow cylinder, which is the screw conveyor is surrounded by a mechanism in longitudinal vibrations offset the cylinder axis.
In general, all vibration methods and such methods have implementing arrangements itself has other disadvantages. In addition to noise, the health of the people who are in the vicinity of vibration systems stop, endangered and soundproofing measures is necessary The heavy use of parts of such systems is also a major disadvantage. The vibrations also cause permanent vibration damage, which e.g. can lead to cracks in the casing.
Furthermore, the occurrence of acceleration differences with areas in which the compression due to the construction of the vibration arrangement only insufficient, possible. One is relative to the sheathing moving vibration device, the longitudinal extent of which is shorter than the length of the pipe to be produced, this effect is reduced, but not completely suppressed. Compaction is particularly important in the areas of socket formation generally more difficult than in the rest of the pipe section, even in the sleeves Form zones in which the mixture is compressed to a much lesser extent. Another The disadvantage is the fact that the system's natural vibrations depend on the level depend on the admission form with concrete quantity and change with it. In order to achieve a uniform compression, the voting behavior of the Systems are dynamically adapted to the level, which is very high Effort is connected.
In addition, vibration processes are limits due to the process itself set: A prerequisite for the use of this method is that the concrete quantity can be compacted sufficiently well by vibration. This requirement is however in some batches - for example batches for production of high-performance or fiber concrete - not met. Furthermore, the manufacture Thin-walled pipes associated with difficulties: To the flow of the granular and rather viscous concrete mixture in the area to be filled between the jacket and Vibration core, the diameter of which corresponds to that of the pipe to be manufactured, not to hinder, this area must have a minimum diameter.
Roller head processes are also used to manufacture pipes from concrete batches used. With this method, a rotating press tool compresses the concrete quantity by pressing against a casing. Here, too, is the compression Difficulties in the area of the sockets. Furthermore, the Limited range of processable batch qualities.
Description of the invention
On the basis of this prior art, the object of the invention is to develop a shaping device with which concrete pipes can be produced in a low-noise and efficient manner with high quality with regard to uniformity and stability of the material properties of the pipe.
According to the invention, this object is achieved in a shaping device of the type described above in that the first part of the tool and the second part of the tool are driven in parallel with one another at different speeds or in opposite directions. The opposite rotation can take place at the same or different speeds.
Any vibration is dispensed with in the shaping device according to the invention , and therefore it does not have the disadvantages of devices which operate with vibration processes. The method of operation is as follows: An amount of concrete is fed to an inlet opening of the intermediate space, which is compacted in the intermediate space: Due to the co-rotation with different speeds or counter- rotation of the tool parts to one another, the granular components of the concrete batch can roll on one another and thereby reduce their distance from one another, so that they have a higher packing density when exiting the space. Since the components of the concrete mixture are granular or liquid, friction losses on the rotating tool parts, which represent the dominant part of the energy losses during compaction, are very low and also locally limited. After exiting the space under pressure, the concrete quantity can then be brought into its final shape.
The shaping is carried out for the outer contour of the tube by means of a jacket shape and for the inner contour of the tube means to the moving relative to the shell mold provided for this purpose work surface portions. In this way, effective production is possible since no further tools have to be used. In order to form the inner contour, a second work surface section of the first part of the tool has the shape of a first outer cylinder with the axis of rotation of the first part of the tool as an axis of symmetry. The diameter of the first outer cylinder is chosen according to the inner diameter of the pipe to be manufactured. Due to the rotation of the first part of the tool, the concrete quantity is brought into the final shape after compacting and exiting from the intermediate space and is smoothed at the same time.
Since the amount of concrete is compressed to a very high degree in the intermediate space, the jacket shape can be separated from the pipe immediately after the end of the compression and shaping . The shell shape is thus immediately available for the next manufacturing process.
At this point it should also be noted that with an arrangement according to the invention also tubes with thin walls can be produced because of the inherent difficulties of the vibration process not occur in this way. In particular, mixtures with special ones can also be used Process properties such as high-performance concrete.
It is expedient for the size of the space, i.e. the minimum Distance of the rotating work surface sections with respect to each other for an effective compaction a value that is in the range of the average grain size the grain of the concrete mix lies to choose. Here's a value of about double the average diameter of the largest grains of the concrete mix proven to be particularly effective.
The opposite rotation of two tool parts rotating around the same axis To achieve, it is useful to separate both parts of the tool To drive waves. The first part of the tool is preferred via a Shaft and the second part of the tool via a hollow shaft surrounding the shaft driven. This has the advantage that both parts have a common drive device can be driven, or via two drive devices, the adjacent along the axis of rotation to save space and easily accessible are attached. However, two shafts with two drive devices are also conceivable on opposite sides of the tool.
In an advantageous embodiment of the invention, the tool and the casing shape are mutually opposed slidably mounted. There is also a guide for the tool provided to achieve a relative movement. For example, the jacket shape rigidly fixed and the tool by means of the guide with concrete supply be moved from one end of the mold to the other. First of all, compacted one end of the concrete batch, brought it into its final shape and smoothed it. The tool can be relative to the shell shape along the axis of rotation be moved until the other end is reached and removed there. For one particularly uniform compression and shaping, i.e. high uniformity of the Material properties, is a continuous supply of concrete, rotation and relative movement along the axis of rotation. Another conceivable variant would also be the fixation of the tool and a moving mounting shape. The manufacture of continuous tubes is also included.
The two work surface sections are advantageous in such a shaping device of the two tool parts, between which there is the space for the passage and compaction of the concrete mix, conical shape, the axis of symmetry of a cone with the axis of rotation of the respective tool part and the axis of symmetry of the tube coincides. In doing so you will each not choose a full cone as the work surface section, but only one segment at a time, which corresponds to a cut perpendicular to the axis of symmetry, because in this way there are other worktop sections with different functionality remain available. Due to the conical shape, the space has now via an opening that is oriented to the axis of rotation and another Opening in the direction of the outer area between the tool and the shell shape is oriented, which simplifies the control of the concrete batch flow.
In an advantageous embodiment, the first work surface section has the first Part of the tool on the shape of a first outer cone, which is in the Direction from which the concrete quantity is fed is tapered. In the opposite The second work surface section of the Connect the first part of the tool, which has the shape of a first outer cylinder. Furthermore, in relation to the embodiment just mentioned, it is advantageous when the first work surface section of the second part of the tool is the Form of an inner cone that extends in the direction from the concrete batch is also tapered. The concrete quantity is thus in the direction opening of the intermediate space oriented towards the axis of rotation. On the conical Boundary surfaces of the space roll the granular components of the Concrete batches on each other and are compacted. Then they kick due the pressure of the advancing batch in the direction of the jacket shape oriented opening into the space between the tool and the jacket shape.
In order to achieve an effective compression, it is advantageous that the inside and first outer cone the same cone angle - the acute angle that the cross section a cone with a plane perpendicular to the axis of symmetry - include, or that the cone angle of the inner cone is larger by a maximum of up to 15 ° than the cone angle of the first outer cone, the cone angle of the first Outer cone is preferably in the range of 50 ° to 75 °. Require cone angles that are too large a very extensive tool along the axis of rotation, which results from manufacturing It is impractical to leave the cone angle too small for smaller ones Pipe diameters no effective compression. Is the cone angle of the inner cone larger than that of the outer cone, the space in tapers Direction of transmission, which increases the compaction of the batch, also becomes a stronger pressure built up under which the batch components from the tapered Exit the end of the space into the space between the jacket shape and the tool. If the cone angles of the inner and first outer cones are chosen the same, then a cone angle of 65 ° is particularly suitable in terms of production.
In order to further increase the compression in the case of the same cone angle and also to improve the batch flow through the gap, it is advantageous on the first outer cone, a depression spiraling around the axis of rotation leave out. Through this spiral depression, the passage of the mixture relieved by the space.
The spiral depression on the first outer cone can take many forms have, but advantageously has the cross section along the axis of rotation Contours of circular sections. Circular contours have the advantage that they have no inner edges in which material could easily stick. she are also the easiest to manufacture, which is beneficial to manufacturing costs of the tool. The edges between the conical surface and recess also be flattened like a tub rim. In the simplest, the The easiest to implement variant have the circles, which are the contours of the spiral Determine the recess on the first outer cone, all of the same radius. It is also useful to place the centers of these circles on a cone to choose horizontally, here is another way of controlling the compression offers if the cone angle of this cone is advantageously equal to that or less than the cone angle of the first outer cone: Has this cone the same cone angle as the first outer cone, so the material is through passed the space and essentially only by rolling on each other compacted. However, this cone has a slightly smaller cone angle than that first outer cone, preferably 60 °, the circular sections fall to the blunt end of the first outer cone flatter, which increases the compression and also builds up a greater pressure than the same cone angle with which the batch finally from the space in the area between the shell shape and the tool is pressed.
In a further expedient embodiment of the invention, a second work surface section has the second part of the tool in the form of a second outer cone on whose axis of symmetry is the axis of rotation of the second part of the Tool corresponds, and which is fed in the direction from the concrete batch is rejuvenated. Because many pipes in order to be able to be nested an end with a larger outer diameter on one side and on the other One end with an outer diameter that - with the same inner diameter is smaller than the outside diameter of the tube in the remaining area, the shape of the jacket tapers in this direction and often ends in a pointed shape, the amount of concrete usually fed from the direction of the tip end shape becomes. If the tool is now moved in the direction of the tip end shape, then the available area between tool and shell shape is smaller. At the same time, the compacted amount of concrete swells through the opening through which it flows out exits the space, also upwards, as it exits under pressure. Due to the conical shape of the second worktop section of the second part of the tool is therefore the action of stronger forces on the tool congestion of concrete during shaping in the area of the tip end shape avoided. This works particularly effectively in the area of cone angles between 65 ° and 83 °, preferably at a cone angle of 77 °.
In this case, it is advantageous if one around the second outer cone Axis of rotation spiral recess is recessed. Through this, when the Area of the tip end shape is reached and the amount of concrete almost this cavity fills in, concrete amount from the pointed end of the form towards the first Part of the tool is transported, and the tool can be easily removed from the jacket shape be removed. Here, too, the spiral depression advantageously has Cross-section along the axis of rotation the contours of circular sections, with the contour-defining circles in the simplest, easiest to implement Variant all have the same radius. The spiral is expedient Depression on the second outer cone designed so that the center points of the circles that determine their contours lie on a cone. It is for one Even transport of the already compacted mixture is advantageous if the cone angle of this cone is the same or one - with a difference of an amount of up to about 5 degrees - a cone angle similar to the second outer cone, preferably 78 °.
To the concrete quantity in the space to pass and compact the Bringing concrete is the second part of the tool on the Side facing the direction from which concrete is fed, with passages equipped to forward the concrete batch into the space. in principle one or more large openings are sufficient. However, to prevent that possibly clumping concrete quantity with only part of the tool runs in the direction of rotation and possibly the gap closes, the passages are designed as slots which are essentially parallel to the axis of rotation of the second part of the tool, advantageous. In this way, the amount of concrete is effectively prevented, only in one Rotate direction of rotation, and clumping batch components are pulled apart until they crumble.
Finally, it is advantageous if a third work surface section of the second Part of the tool for shaping the inner contour is the shape of a second outer cylinder about the axis of rotation of the second part of the tool, wherein the second outer cylinder is the same radius as or a larger radius than the first outer cylinder. The second outer cylinder can do the same Radius are used for preforming and relieve the first outer cylinder. To facilitate removal of the tool, it is advantageous to use the spiral Continue deepening on the second outer cone into the third work surface.
The radius of the second outer cylinder becomes larger than that of the first outer cylinder selected, you can basically manufacture a concrete pipe from two layers, the outer layer being shaped and compressed only by the second outer cylinder becomes. To increase the compression effect, you can use the second outer cone a roller level with tool parts based on the principle of the roller head method work, be provided. The use of a third is also conceivable Part of the tool for compacting the component of the concrete mix for the Outer layer between the second and third part of the tool in the one described above Wise. The component of the batch for the inner layer is in the space between the first and second part of the tool is highly compressed and brought into the final shape by the first outer cylinder.
Brief description of the drawings
The invention will be described below using an example. In the accompanying drawings
Fig. 1
an overall view of a shaping device,
Fig. 2
3 shows a cross section through the shaping device with an enlarged representation of the intermediate area,
Fig. 3
a holder with a guide for the tool to achieve a relative movement,
Fig. 4
a representation of the first part of the tool,
Fig. 5
a representation of the second part of the tool.
Detailed description of the drawings
1 is the overall view of a shaping device according to the invention shown. A jacket shape for shaping the outer contour consists of a jacket 1, which is provided with a lower sleeve 2 and an upper sleeve 3. Subframe 2 and Upper sleeve 3 are also used to produce precisely fitting pipes that fit into one another can be inserted, the upper sleeve 3 gives the jacket shape the shape of a point End. The lower part of the jacket is in the area of the lower sleeve 2 concrete quantity 4. The first part 5 of the tool, which over a shaft 6 is still located in the drawing outside the shell shape, while the second part 7 of the tool, which is driven via a hollow shaft 8 is already at the preforming of the concrete batch 4.
2 shows a partial cross section through the shaping device. In the arrangement shown, the second part 7 of the tool is in the direction from which concrete is supplied, arranged over the first part 5 of the tool and partially envelops it. The gap is between the two 9 for passing and compacting the concrete batch. About wave 6 and the hollow shaft 8 can be the first part 5 of the tool and the second part 7 of the tool are rotated independently of one another. The way that the amount of concrete 4 takes is shown as a dashed arrow. It is from Filled in at the top, caught by the second part 7 of the tool and into the space 9 passed where it by rolling off the granular components of the concrete mix 4 is compressed onto each other. After compaction, it occurs at the bottom End of the space 9 radially and under pressure in the area between Shell shape and tool, where through the first part 5 of the tool The inner contour is shaped in this area. The concrete batch 4 will pressed into the area between the jacket shape and the tool until it is filled and the amount of concrete 4 through the opening of the space 9 at the bottom The end begins to rise.
By means of a holder 10, as exemplified in FIG. 3, can then the tool slowly relative to the shell shape along the axis of rotation in the direction the upper sleeve 3 are moved, whereby the entire inner contour is formed becomes. For this purpose, a guide is provided in the example: a spindle 11, which on a Side is driven by a drive device 12 and in on the other side a bearing 13 rests, is via a spindle nut 14 with a cross member 15 the ends of which are carriages 16 connected. The carriage 16 are in Guide rails 17 guided along the direction of the spindle. The cross member 15 is in turn with a drive device 18 for the shaft drive and a drive device 19 connected for the hollow shaft drive via a gear 20.
Fig. 4 shows different views of the first part 5 of the tool with a conical Shape. The first work surface section of this tool part has the shape of a first outer cone 21, the second work surface section in the shape of a first Outer cylinder 22. The first outer cylinder 22 is smooth and is used for shaping the inner tube contour. On the first outer cone 21 is one around the axis of rotation spiral recess 23 recessed. It is used to control the batch feed-through through the space 9: Concrete quantity detected in the upper area 4 is transported downwards and compressed at the same time. In order to prevent batch components from getting stuck in corners or inside edges, the spiral recess 23 has the contours of circular sections in cross section. The centers of the circles lie on a conical surface, the cone angle β is slightly smaller than the cone angle α of the first outer cone 21, whereby the compression can be increased, as can the pressure under which the Concrete amount 4 through the space 9 in the area between the tool and Coat emerges.
5 shows various views of the second part 7 of the tool. The first working surface section of this part has the shape of an inner cone 24. The cone angle γ of the inner cone 24 and the cone angle α of the first outer cone 21 are the same. The second worktop section of this section has the Form of a second outer cone 25. On the second outer cone 25 is one recessed spiral recess 26, the screw direction opposite to of the spiral recess 23. Through the spiral recess 26 supplied concrete batch 4 from the pointed end of the shell shape with the upper sleeve 3 transported in the direction of the first part 5 of the tool. That way allows easier removal of the tool from the jacket shape. To prevent, that batch constituents get stuck in corners or inside edges the spiral recess 26 in cross section the contours of circular sections. The centers of the circles lie on a conical surface, the cone angle ε is slightly larger than the cone angle δ of the second outer cone 25. That side of the second part 7 of the tool, which points in the direction, from the concrete quantity 4 is supplied, is provided with passages 28 through which the amount of concrete 4 is passed into the space 9. Their slot-like shape prevents them a circulation of the undensified concrete batch 4 with the direction of rotation of the first part 5 of the tool. A third work surface section of the second part 7 of the tool finally has the shape of a second outer cylinder 27 which can be used for preforming the concrete batch 4 if this over the opening of the space 9 to the shell shape rises. The spiral In this case, recess 26 also extends over this second outer cylinder 27, which, however, has no influence on the final shape and only should facilitate the removal of the tool.
Another conceivable application of the method and arrangement, which results from the claims, is the production of two-layer concrete pipes. This is useful, for example, if requirements are placed on the inner contour of the pipe that make it necessary to use high-quality and expensive concrete for the inner layer. However, these requirements are not placed on the outside area, so that in principle another concrete can be used for the outside layer. In the arrangement shown, it is also possible to process a concrete batch consisting of two components, which in turn can themselves be concrete batches with different properties, without substantial mixing of the components, if the second part 7 of the tool is designed in such a way that the radius of the second outer cylinder 27 is larger than the radius of the first outer cylinder 22. The difference between the two radii then determines the wall thickness of the inner layer. The concrete quantity provided for the outer layer is then passed directly into the space between the shell shape and the tool, where it is smoothed and compressed by the second outer cylinder 27. In order to increase the compression effect of the second part 7 of the tool, a roller plane with tool parts that work according to the principle of the roller head method can also be provided on the second outer cone 25. The high-quality concrete batch, which is provided for the inner layer, is the only one of the two batches to be passed through the passages 28 into the intermediate space 9, where it is compacted. The final contouring of the inner diameter then takes place through the first outer cylinder 22. It is of course important to ensure that the paths of the concrete quantity for the inner and outer layers are separate. This can be done, for example, by means of a hollow cylinder that surrounds the hollow shaft 8, the hollow cylinder should have approximately the same diameter as the second part 7 of the tool has on the side that is in the direction from which the concrete quantity is fed.
LIST OF REFERENCE NUMBERS
1
coat
2
base ring
3
upper sleeve
4
concrete mixture
5
first part of the tool
6
wave
7
second part of the tool
8th
hollow shaft
9
gap
10
bracket
11
spindle
12
driving means
13
camp
14
spindle nut
15
crossbeam
16
carriage
17
guide rails
18
driving means
19
driving means
20
transmission
21
first outer cone
22
first outer cylinder
23
spiral depression
24
inner cone
25
second outer cone
26
spiral depression
27
second outer cylinder
28
Passage
α
Cone angle of the first outer cone
β
Cone angle for conical surface
γ
Cone angle of the inner cone
δ
Cone angle of the second outer cone
ε
Cone angle for conical surface

Claims (26)

  1. A moulding system for making pipes from a concrete mix (4), comprising:
    a jacket mould for forming the outer contour of the pipe and
    a tool of several parts, provided with at least one driving system and intended for compacting the concrete mix (4) filled into the moulding system and for forming the inner contour, wherein
    a space (9) for conducting and compacting the concrete mix (4) is provided between a first working face segment of a first part (5) of the tool and a first working face segment of a second part (7) of the tool, and
    a second first working face segment of the first part (5) of the tool, intended for forming the inner contour, has the shape of a first external cylinder (22) surrounding the axis of rotation of the first part (5) of the tool, in which
    the first part (5) of the tool and the second part (7) of the tool are driven in the same sense of rotation at different speeds, or in opposite senses of rotation;
  2. The moulding system as claimed in Claim 1, in which the size of the space (9) is preset so that the smallest distance between the first working face segment of the first part (5) of the tool and the first working face segment of the second part (7) of the tool is twice the mean diameter of the largest grains of the concrete mix.
  3. The moulding system as claimed in Claim 1 or 2, in which both parts of the tool (5, 7) are driven by separate shafts, preferably in such a way that the first part (5) of the tool is driven by a solid shaft (6) and the second part (7) of the tool by a hollow shaft (8) enclosing the solid shaft;
  4. The moulding system as claimed in Claim 1, 2 or 3, in which the tool and the jacket mould are arranged so that their positions can be shifted relative to each other and a guiding device is provided for the tool to achieve a relative movement.
  5. The moulding system as claimed in Claim 1, 2, 3 or 4, in which the two working face segments of the two tool parts (5, 7) that enclose the space (9) for conducting and compacting the concrete mix (4) have a conical shape, the axis of symmetry of the respective cone being the axis of rotation of the respective tool part (5 or 7).
  6. The moulding system as claimed in Claim 5, in which the first working face segment of the first part (5) of the tool has the form of a first external cone (21), which tapers off toward the direction from which the concrete mix (4) is fed.
  7. The moulding system as claimed in Claim 5 or 6, in which the first working face segment of the second part (7) of the tool has the form of an internal cone (24), which tapers off toward the direction from which the concrete mix (4) is fed.
  8. The moulding system as claimed in Claim 5, 6 or 7, in which the taper angle (γ) of the internal cone (24) is equal to, or up to 15. greater than, the taper angle (α) of the first external cone (21), with the taper angle (α) of the first external cone (21) preferably having a size between 50° and 75°.
  9. The moulding system as claimed in Claim 5, 6, 7 or 8, in which the taper angles (a) and (y) of the internal cone (24) and the first external cone (21) are equal, with a preferable size of 65°.
  10. The moulding system as claimed in Claim 5, 6, 7, 8 or 9, in which the first external cone (21) is provided with a helical groove (23), the axis of which is the axis of rotation;
  11. The moulding system as claimed in Claim 10, in which, in a section along the axis of rotation, the helical groove (23) of the first external cone (21) has the contours of circle sectors.
  12. The moulding system as claimed in Claim 11, in which the circles that determine the contours of the helical groove (23) on the first external cone (21) have all the same radius.
  13. The moulding system as claimed in Claim 11 or 12, in which the centres of the circles that determine the contours of the helical groove (23) on the first external cone (21) lie on a conical surface.
  14. The moulding system as claimed in Claim 13, in which the conical surface on which the centres of the circles lie that determine the contours of the helical groove (23) on the first external cone (21) has a taper angle (β), which is equal to, or smaller than, the taper angle (a) of the first external cone and has preferably a size of 60°.
  15. The moulding system as claimed in any of the Claims 1 to 14, in which a second working face segment of the second part (7) of the tool has the form of a second external cone (25), the symmetry axis of which is the axis of rotation of the second part (7) of the tool, and which tapers off toward the direction from which the concrete mix (4) is fed.
  16. The moulding system as claimed in Claim 15, in which the taper angle (δ) of the second external cone (25) is equal to, or greater than, the taper angle (γ) of the internal cone (24), preferably with a size between 65° and 83°, preferably 77°.
  17. The moulding system as claimed in Claim 15 or 16, in which the second external cone (25) is provided with a helical groove (26), the axis of which is the axis of rotation.
  18. The moulding system as claimed in Claim 17, in which, in a section along the axis of rotation, the helical groove (26) of the second external cone (25) has the contours of circle sectors.
  19. The moulding system as claimed in Claim 17, in which the circles that determine the contours of the helical groove (26) on the second external cone (25) have all the same radius.
  20. The moulding system as claimed in Claim 18 or 19, in which the centres of the circles that determine the contours of the helical groove (26) on the second external cone (25) lie on a conical surface.
  21. The moulding system as claimed in Claim 20, in which the conical surface on which the centres of the circles lie that determine the contours of the helical groove (26) on the second external cone (25) has a taper angle (ε), whose size is in a range of +/- 5° of the taper angle (δ) of the second external cone (25) and has preferably a size of 78°.
  22. The moulding system as claimed in any of the Claims 1 to 21, in which the side of the second part (7) of the tool, that faces the direction from which the concrete mix (4) is fed, is provided with passageways (28) for conducting the concrete mix (4) into the space (9).
  23. The moulding system as claimed in Claim 22, in which the passageways (28) have the shape of slots that are arranged essentially in parallel with the axis of rotation of the second part (7) of the tool.
  24. The moulding system as claimed in any of the Claims 1 to 23, in which a third working face segment of the second part (7) of the tool for forming the internal contour has the form of a second external cylinder (27) surrounding the axis of rotation of the second part (7) of the tool and whose radius is equal to or greater than that of the first external cylinder (22).
  25. The moulding system as claimed in Claim 24, in which the second external cylinder (27) is provided with a continuation of the helical groove (26) provided on the second external cone (25).
  26. The moulding system as claimed in Claim 24 or 25, in which the radius of the first external cylinder (22) is smaller than the radius of the second external cylinder (27), and in which a device for separate feeding of two components of the concrete mix (4) is provided in such a way that only one of the said two components is conducted into the space (9), whereas the other component is conducted directly into the space between the jacket mould and the tool.
EP20010126084 2001-11-02 2001-11-02 Apparatus for the production of concrete pipes Not-in-force EP1308254B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20010126084 EP1308254B1 (en) 2001-11-02 2001-11-02 Apparatus for the production of concrete pipes

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE50101337T DE50101337D1 (en) 2001-11-02 2001-11-02 Shaping device for the production of pipes made of concrete
EP20010126084 EP1308254B1 (en) 2001-11-02 2001-11-02 Apparatus for the production of concrete pipes
AT01126084T AT257766T (en) 2001-11-02 2001-11-02 Molding device for the production of pipes from concrete amount
US10/286,337 US6984118B2 (en) 2001-11-02 2002-11-01 Method and apparatus for the production of tubes from concrete mix

Publications (2)

Publication Number Publication Date
EP1308254A1 EP1308254A1 (en) 2003-05-07
EP1308254B1 true EP1308254B1 (en) 2004-01-14

Family

ID=8179147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010126084 Not-in-force EP1308254B1 (en) 2001-11-02 2001-11-02 Apparatus for the production of concrete pipes

Country Status (4)

Country Link
US (1) US6984118B2 (en)
EP (1) EP1308254B1 (en)
AT (1) AT257766T (en)
DE (1) DE50101337D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10314722C5 (en) * 2003-03-31 2010-03-04 Schlosser-Pfeiffer Gmbh Apparatus and method for producing multilayer concrete pipes
US20060000215A1 (en) * 2004-07-01 2006-01-05 Kremen Stanley H Encapsulated radiometric engine
CN103831901B (en) * 2014-03-11 2016-05-18 冼日声 ground upender

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE623624C (en)
GB210872A (en) * 1922-11-08 1924-02-08 Victorio Maggio Improvements in and connected with press-moulding apparatus for the manufacture of cylindrical and like objects from concrete and other compressible material
DE623264C (en) * 1932-09-20 1935-12-17 Edward Henry Bishop Machine for the production of pipes from cementitious material or for lining pipes with this material
GB430734A (en) 1933-09-19 1935-06-24 Edward Henry Bishop Improved apparatus for the manufacture of pipes and or the lining thereof with cementitious material
US3192292A (en) * 1961-12-07 1965-06-29 Joseph E Banks Method of forming hollow concrete bodies
AT277035B (en) * 1968-03-20 1969-12-10 Ettlingen Pfeiffer Kg Maschf Method and device for the manufacture of cement pipes
DE4322785A1 (en) * 1992-08-17 1995-01-19 Zueblin Ag Process for the production of concrete pipes and device for carrying out the process
US6106749A (en) * 1997-01-08 2000-08-22 Adly; Tarek A. Method and machine for making concrete pipe

Also Published As

Publication number Publication date
US6984118B2 (en) 2006-01-10
US20030085490A1 (en) 2003-05-08
DE50101337D1 (en) 2004-02-19
AT257766T (en) 2004-01-15
EP1308254A1 (en) 2003-05-07

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