Abstract: A device for producing plastic pipes may include an extruder with a die head and a corrugator, into which a molten plastic tube is introduced by means of the die head to mold the plastic pipe, wherein the corrugator has a molding section, in which molding jaws are guided in pairs in the production direction. In an inlet section of the corrugator, the molding jaws are brought together to form molding jaw pairs towards the start of the molding section, and in an outlet section of the corrugator, the molding jaw pairs are moved apart from each other from the end of the molding section. The guiding apparatus has a guide and/or temperature-control element apparatus having a temperature-control medium channel apparatus through which temperature-control medium can flow, and a guide and/or temperature-control surface apparatus, which faces the outer side of the molding jaws passing through, transferring heat.

Abstract: A device for producing plastic pipes may include an extruder with a die head and a corrugator, into which a molten plastic tube is introduced by means of the die head to mold the plastic pipe. The corrugator has a molding section, in which molding jaws are guided in pairs in the production direction; in an inlet section of the corrugator, the molding jaws are brought together to form molding jaw pairs towards the start of the molding section; and in an outlet section of the corrugator, the molding jaw pairs are moved apart from each other from the end of the molding section. Each molding jaw has a first and second guide pins and the molding jaws are guided in the guiding apparatus in that the first and second guide pins engage, with respective free ends, in first and second guide grooves of the guiding apparatus.

Abstract: An apparatus for producing thermoplastic corrugated pipes may include an extrusion device with an extruder and an extrusion die device and a corrugator device with traveling mold jaws. The extrusion device and the corrugator device are positionally movable in relation to one another, for example for adjustment. The extrusion device is positionally movable in relation to the corrugator device in a horizontal plane, while the corrugator device is movable exclusively in height here.

Abstract: A corrugator device for shaping thermoplastic corrugated pipes from a tube of molten plastics material emerging from an extrusion device may include molding jaws, grippers for returning the molding jaws from the end of a molding section to the start of the molding section, and a mold release device. The mold release device is arranged at the end of the molding section, and has a motor-driven rotary disk for interacting with the pair of molding jaws. The pair of molding jaws, which has reached the end of the molding sections, is moved apart by means of first and second drivers formed on the motor driven rotary disk.

Abstract: A corrugator device for shaping thermoplastic corrugated pipes out of a molten plastic tube issuing from an extrusion device may include moving molding jaws which circulate in a linear molding section and are arranged in paired successive relationship in the molding section forming a molding passage. The pairs of molding jaws may be formed from left-hand and right-hand molding jaws and between them enclose a cylindrical mold cavity to form the molding passage. The device may include a gripper device for guiding the molding jaws from the end of the molding section back to the start of the molding section, and having grippers respectively for the left-hand and the right-hand molding jaws, each with a separate guide and drive device.

Abstract: A method and an apparatus for producing an endless double-walled pipe having corrugated pipe sections and sleeve pipe sections are described. The production is effected by extrusion of an outer tube (Sa), forming the outer pipe of the double-walled pipe, and of an inner tube (Si), forming the inner tube of the double-walled pipe, in a molding passage (10) having sections with a corrugated molding surface and a smooth cylindrical sleeve molding surface. To shape the sleeve section, the outer tube is extruded into the sleeve molding surface and is brought into contact with the sleeve molding surface. The inner tube (Si) is then extruded into the outer tube (Sa), already in contact over the entire axial length of the sleeve molding surface, and is brought in the process into contact with the inner side of said outer tube (Sa) that is in contact.

Abstract: An injection head (10) is described for a corrugator which is intended for the production of plastics pipes. The injection head (10) has a main head (12), a nozzle body (14) and a mouthpiece means (16) with at least one mouthpiece (32, 36). The main head (12) is embodied with first channels (50, 52) and the nozzle body (14) is embodied with second channels (58, 60) which are flow-connected to the first channels (50, 52). The/each mouthpiece (32, 36) has a central body (74, 76) and a sleeve body, (78, 80) surrounding said central body. On its lateral surface (82, 84) facing the sleeve body (78, 80), the central body (74, 76) is embodied with wound plastics distributor grooves (86, 88) which are flow-connected by means of connecting portions (114, 120) to a concentric annular groove (112, 116) which is formed on the reverse surface (90, 92) of the central body (74, 76) and into which the second channels (58, 60) of the nozzle body (14) discharge.

Abstract: A method and an apparatus for producing an endless double-walled pipe having corrugated pipe sections and sleeve pipe sections are described. The production is effected by extrusion of an outer tube (Sa), forming the outer pipe of the double-walled pipe, and of an inner tube (Si), forming the inner tube of the double-walled pipe, in a molding passage (10) having sections with a corrugated molding surface and a smooth cylindrical sleeve molding surface. To shape the sleeve section, the outer tube is extruded into the sleeve molding surface and is brought into contact with the sleeve molding surface. The inner tube (Si) is then extruded into the outer tube (Sa), already in contact over the entire axial length of the sleeve molding surface, and is brought in the process into contact with the inner side of said outer tube (Sa) that is in contact.

Abstract: Described is a corrugator device for shaping thermoplastic corrugated pipes out of a molten plastic tube issuing from an extrusion device comprising moving molding jaws 1.1 through 1.6 which circulate in a linear molding section 10 and arranged in paired successive relationship in the molding section 10 form a molding passage, wherein the pairs of molding jaws are formed from left-hand and right-hand molding jaws 1.1 through 1.6 and between them enclose a cylindrical mold cavity to form the molding passage, and a gripper device 2 for guiding the molding jaws 1.1 through 1.6 from the end of the molding section 10 back to the start of the molding section 10. The gripper device has a gripper 2 for the left-hand molding jaws and a gripper 2 for the right-hand molding jaws with a guide and drive device. The guide and drive device has a linear guide rail X1 extending in the X-direction and a linear guide rail Y1 extending in the Y-direction, which are each in the form of respective separate rail devices.

Abstract: A description is given of a corrugator device for shaping thermoplastic corrugated pipes from a tube of molten plastics material emerging from an extrusion device, with molding jaws 1.1 to 1.6 which are guided so as to circulate in a linear molding section 10 and are arranged in pairs one behind the other so as to form a molding passage in the molding section 10, wherein the pairs of molding jaws are formed from left-hand and right-hand molding jaws 1.1 to 1.6 and between them enclose a cylindrical mold cavity to form the molding passage; with grippers 2 for returning the molding jaws 1.1 to 1.6 from the end of the molding section 10 to the start of the molding section 10. Arranged at the end of the molding section 10 is a mold release device, which has at least one motor-driven rotary disk 3.

Abstract: The invention relates to an apparatus for producing thermoplastic corrugated pipes. The apparatus has an extrusion device 1 with an extruder 1a and an extrusion die device 1b and a corrugator device 2 with traveling mold jaws 2f. The extrusion device 1 and the corrugator device 2 are positionally movable in relation to one another, for example for adjustment. The extrusion device 1 is positionally movable in relation to the corrugator device 2 in a horizontal plane, while the corrugator device 2 is movable exclusively in height here.

Abstract: An injection head (10) is described for a corrugator which is intended for the production of plastics pipes. The injection head (10) has a main head (12), a nozzle body (14) and a mouthpiece means (16) with at least one mouthpiece (32, 36). The main head (12) is embodied with first channels (50, 52) and the nozzle body (14) is embodied with second channels (58, 60) which are flow-connected to the first channels (50, 52). The/each mouthpiece (32, 36) has a central body (74, 76) and a sleeve body, (78, 80) surrounding said central body. On its lateral surface (82, 84) facing the sleeve body (78, 80), the central body (74, 76) is embodied with wound plastics distributor grooves (86, 88) which are flow-connected by means of connecting portions (114, 120) to a concentric annular groove (112, 116) which is formed on the reverse surface (90, 92) of the central body (74, 76) and into which the second channels (58, 60) of the nozzle body (14) discharge.

Abstract: An apparatus for producing double-walled composite tubes, which have an outer wall with wave peaks and wave valleys and a smooth inner wall, includes two of rows first and second shaping-jaw halves which, along a common shaping section, form a shaping tunnel. The first shaping-jaw halves are located opposite each other in the shaping section and have an inner contour forming a tube socket portion. The second shaping-jaw halves, also located opposite each other, include transverse grooves alternating with transverse fins. A sizing mandrel, which defines narrow vacuum grooves spaced apart from one another in the axial direction on its outer lateral surface, projects into the shaping tunnel and forms the smooth inner wall of the composite tube. A vacuum control valve device provides for defined closure and reopening of the vacuum grooves when positioned in correspondence with the tube socket portion.

Abstract: A half-mold for a corrugator for making pipes with transverse ribs. The half-mold comprises two sides located spaced apart from each other and a semi-cylindrical base surface linking the two sides. Directly mounted forming elements bent in the shape of a semicircle which define the outer surface of the pipe with transverse ribs are removably fixed on the base surface. The directly mounted forming elements bent in the shape of a semicircle are removably fixed with fixing elements on the half-mold.

Abstract: Described is an apparatus for the production of transversely ribbed tubes comprising mold jaw halves which are movable in a condition of bearing against each other along two guide. The guide paths have a common mold section, a respective return section and two respective direction-changing sections. The respective direction-changing section has a direction-changing member which is linearly movably guidedly arranged on a base element fixed with respect to the machine and which is connected to a compensating device which is provided to compensate for the tolerance play of the mold jaw halves which circulate along the associated guide path, said tolerance play being dependent on the temperature and/or the speed of the mold jaw halves.

Abstract: Described is a mold jaw half for an apparatus for the production of transversely ribbed tubes, wherein the mold jaw half (16) has end faces and a base face and in its interior a cooling passage with a coolant feed and a coolant discharge, which open at a spacing from each other at the base face of the mold jaw halves. In order to provide a reduced flow resistance for the coolant through the cooling passage and consequently an increased coolant through-put, resulting in an improved cooling action, it is proposed that the coolant feed and the coolant discharge cross, as seen in a direction viewing on to the end faces of the mold jaw halves, and are oriented in opposite relationship with respect to the advance direction of the mold jaw half. That mutually opposite orientation provides that the coolant is virtually shovelled into the cooling passage.

Abstract: Described is an apparatus for the production of transversely ribbed tubes, comprising mold jaw halves which are circulatingly moved in a condition of bearing against each other along two endless guide paths by means of a respective associated drive device, wherein the two guide paths have a common mold sections, a respective return section and two respective direction-changing sections. The respective direction-changing section has a direction-changing member provided with an arcuate guide edge. The guide paths along the common mold section and along the return sections have elongate wearing elements comprising a low-wear plastic material, which are exchangeably provided on a base arrangement of the apparatus.

Abstract: Described is an apparatus (10) for the production of transversely ribbed tubes comprising mold jaw halves (16) which are movable in a condition of bearing against each other along two guide paths (14). The guide paths (14) have a common mold section (18), a respective return section (20) and two respective direction-changing sections (22; 24). The respective direction-changing section (22, 24) has a direction-changing member (26; 28) which is linearly movably guidedly arranged on a base element (38) fixed with respect to the machine and which is connected to a compensating device (42) which is provided to compensate for the tolerance play of the mold jaw halves (16) which circulate along the associated guide path (14), said tolerance play being dependent on the temperature and/or the speed of the mold jaw halves (16).

Abstract: Described is a mold jaw half for an apparatus for the production of transversely ribbed tubes, wherein the mold jaw half (16) has end faces and a base face and in its interior a cooling passage with a coolant feed and a coolant discharge, which open at a spacing from each other at the base face of the mold jaw halves. In order to provide a reduced flow resistance for the coolant through the cooling passage and consequently an increased coolant through-put, resulting in an improved cooling action, it is proposed that the coolant feed and the coolant discharge cross, as seen in a direction viewing on to the end faces of the mold jaw halves, and are oriented in opposite relationship with respect to the advance direction of the mold jaw half. That mutually opposite orientation provides that the coolant is virtually shovelled into the cooling passage.

Abstract: Described is an apparatus for the production of transversely ribbed tubes, comprising mold jaw halves which are circulatingly moved in a condition of bearing against each other along two endless guide paths by means of a respective associated drive device, wherein the two guide paths have a common mold sections, a respective return section and two respective direction-changing sections. The respective direction-changing section has a direction-changing member provided with an arcuate guide edge. The guide paths along the common mold section and along the return sections have elongate wearing elements Comprising a low-wear plastic material, which are exchangeably provided on a base arrangement of the apparatus.