DE-102024133054-A1 - Device for manufacturing plastic pipes

Abstract

A device for manufacturing plastic pipes, in particular corrugated plastic pipes, is described. The device comprises an extruder (1) with a die head (2) and a corrugator (3) in which a plastic melt tube is introduced via the die head (2) for forming the plastic pipe, wherein the die jaws (10) running in pairs in the die section (55) are subjected to a vacuum in the area of the inner die surface (200) of the die pairs in the sense of suction by means of a vacuum device (50, 50.1, 50.2) acting on the inner die surface (200) via vacuum channels formed in the die jaws by means of channel inlets formed on the outside of the die jaws, wherein the die jaw has a section bounded by the parting surface (100) and a section bounded by the back of the die jaw. The vacuum channels are formed in the section bounded by the separating surface (100), and the coolant channel (40) or coolant channels (40) are formed in the section bounded by the rear side, and the coolant channel or coolant channels form a net-like and/or grid-like structure of coolant channel sections connected in a zigzag and/or serpentine pattern.

Inventors

• Daniel Eck
• Martin Thein
• Frank Deckert

Assignees

• UNICOR GMBH

Dates

Publication Date

20260513

Application Date

20241112

Claims (20)

1. Device for manufacturing plastic pipes, in particular corrugated plastic pipes, the device comprising an extruder (1) with a die head (2) and a corrugator (3) in which a plastic melt tube is introduced via the die head (2) for forming the plastic pipe, wherein left die jaws 10 and right die jaws (10) are guided in the corrugator in a continuous rotation of the left die jaws and in a continuous rotation of the right die jaws, the left die jaws being mounted in a motor-driven rotating carriage (5.1) via die jaw carriers (11) and the right die jaws being mounted in a motor-driven right rotating carriage (5.2) via die jaw carriers (11) such that in a horizontal forming section (55) the left and right die jaws are guided in pairs as die jaw pairs with a vertical parting plane (100), preferably a vertical parting surface, in the production direction (P) forming an axially extending cross-section in the die jaw pair annular inner forming surface (200), and that the forming jaws are each returned from the end of the forming section (55) to the beginning of the forming section (55) in a return (6.1) of the left forming jaws and in a return (6.2) of the right forming jaws, - wherein the forming jaws running in pairs in the forming section (55) are subjected to a vacuum in the area of the inner forming surface (200) of the forming jaw pairs in the sense of suction, by means of a vacuum device (50, 50.1, 50.2) acting on the inner forming surface (200) via vacuum channels formed in the forming jaws by interaction with channel inlets of the vacuum channels formed on the outside of the forming jaws, - wherein the forming jaws (10) are cooled in the corrugator (3) via a cooling device, in that one or more coolant channels (40) are formed separately from the vacuum channels in each of the forming jaws (10), wherein one coolant channel (40) or the multiple coolant channels (40) are permanently supplied with liquid coolant, - by the mold jaw carriers (11) each having at least one coolant inlet channel (44.1) which communicates with the coolant channel (40) or coolant channels (40) of the associated mold jaw (10) via at least one coolant channel inlet (40.1) of the mold jaw (10) formed in the rear of the mold jaw, and the mold jaw carriers (11) each having at least one coolant outlet channel (44.2) which communicates with the coolant channel (40) or coolant channels (40) of the associated mold jaw (10) via at least one coolant channel outlet (40.2) of the mold jaw (10) formed in the rear of the mold jaw, - wherein the mold jaw has a section bounded by the parting plane, preferably parting surface (100), and a section bounded by the rear of the mold jaw, wherein in the section bounded by the parting plane, preferably parting surface (100), the coolant is supplied with liquid coolant. (100) the vacuum channels and the inner mold surface (20) are formed in the section bounded by the rear side, and the coolant channel (40) or coolant channels (40) are formed in the section bounded by the rear side, and the coolant channel or coolant channels form a network- and/or lattice-like structure of coolant channel sections connected in a zigzag and/or serpentine manner, characterized in that a) the mold jaw has a series of upper short vacuum channels (O1) extending along the mold jaw axis (X) adjacent to the parting surface (100) and a series of lower short vacuum channels (U1) extending along the mold jaw axis (X) adjacent to the parting surface (100), wherein the series of upper short vacuum channels (O1) and the series of lower short vacuum channels (U1) are arranged on their side facing away from the parting surface (100) adjacent to the network- and/or lattice-like structure of the coolant channel (40) or coolant channels (40). is, and/or b) that the mold jaw has a series of upper short vacuum channels (O1) extending along the mold jaw axis (X) adjacent to the parting surface (100) and a series of upper long vacuum channels (O2) extending along the mold jaw axis (X) adjacent to the series of upper short vacuum channels (O1), wherein the series of upper long vacuum channels (O2) is arranged on its side facing away from the series of upper short vacuum channels (O1) adjacent to the mesh-like and/or grid-like structure of the coolant channel (40) or coolant channels (40), and/or c) that the mold jaw has a series of lower short vacuum channels (U1) extending along the mold jaw axis (X) adjacent to the parting surface (100) and a series of lower long vacuum channels (U2) extending along the mold jaw axis (X) adjacent to the series of lower short vacuum channels (U1), wherein the series of lower long vacuum channels (U2) is arranged on its side facing away from the The series of lower short vacuum channels (U1) is arranged adjacent to the mesh and/or grid-like structure of the coolant channel (40) or coolant channels (40) on the side facing away from the lower short vacuum channel, wherein said vacuum channels are configured as follows: - the upper short vacuum channel: the upper short vacuum channel (O1) is, preferably parallel to the parting surface (100), exclusively in the upper half section of the mold jaw (10) formed, and/or the upper short vacuum channel (O1) has at least one outer channel inlet (O1-S) on the top of the molding jaw and at least one inner opening (O1-E) into the inner molding surface (20) in the upper region of the inner molding surface (20), preferably adjacent to the parting surface (100); - the lower short vacuum channel: the lower short vacuum channel (U1) is formed, preferably parallel to the parting surface (100), exclusively in the lower half section of the molding jaw (10), and/or the lower short vacuum channel (U1) has at least one outer channel inlet (U1-S) on the underside of the molding jaw and at least one inner opening (U1-E) into the inner molding surface (20) in the lower region of the inner molding surface (20), preferably adjacent to the parting surface (100); - the upper long vacuum channel: the upper long vacuum channel (O2) is formed in the upper half section of the molding jaw (10) and extends to the boundary with the lower section of the molding jaw or into the lower section of the molding jaw, and/or the upper long vacuum channel (O2) has at least one outer channel inlet (O2-S) on the top of the molding jaw and at least one inner inlet (O2-E) into the inner molding surface (20) in the middle area or in the lower area of the inner molding surface (20); - the lower long vacuum channel: the lower long vacuum channel (U2) is formed in the lower half section of the molding jaw (10) and extends to the boundary of the upper half section of the molding jaw or into the upper section of the molding jaw, and/or the lower long vacuum channel (U2) has at least one outer channel inlet (U2-S) on the underside of the molding jaw and at least one inner inlet (U2-E) into the inner molding surface (20) in the middle area of the inner molding surface (20) or in the upper area of the inner molding surface (20).
2. Device according to Claim 1 , characterized in that , (i) in embodiments according to alternative a) of the main claim 1 It is provided that the outer channel inlet (O1-S) of the upper short vacuum channel (O1) formed on the upper side of the molding jaw is the only outer channel inlet of the upper short vacuum channel (O1) on the outside of the molding jaw, and/or that the outer channel inlet (U1-S) of the lower short vacuum channel (U1) formed on the underside of the molding jaw is the only outer channel inlet of the lower short vacuum channel (U1) on the outside of the molding jaw; and/or (ii) that in embodiments according to alternative b) of the main claim 1 It is provided that the outer channel inlet (O1-S) of the upper long vacuum channel (O2) formed on the upper side of the mold jaw is designed as a separate outer channel inlet of the upper long vacuum channel (O2) or as a common outer channel inlet of the upper long vacuum channel (O2) and the upper short vacuum channel (O1) relative to the outer channel inlet (O1-S) of the upper short vacuum channel (O1); and/or (iii) that in embodiments according to alternative c) of the main claim 1 It is provided that the outer channel inlet (U2-S) of the lower long vacuum channel (U2) formed on the underside of the mold jaw is designed as a separate channel inlet of the lower long vacuum channel (U2) relative to the outer channel inlet (U1-S) of the lower short vacuum channel (U1) or as a common outer channel inlet of the lower long vacuum channel (U2) and the lower short vacuum channel (U1).
3. Device according to one of the preceding claims, characterized in that (i) in embodiments according to alternative a) of the main claim 1 and/or in the case of executions according to alternative b) of the main claim 1 , is provided that the upper short vacuum channel (O1) has only one inner opening (O1-E) into the inner forming surface (20) of the molding jaw, preferably formed in an upper region of the inner forming surface, or has several inner openings (O1-E) into the inner forming surface (20) of the molding jaw, preferably one, some or each of them formed in the upper half section of the molding jaw; and/or (ii) that in embodiments according to alternative b) of the main claim 1 and/or in the case of executions according to alternative c) of the main claim 1 , is provided that the lower short vacuum channel (U1) has only one inner opening (U1-E) into the inner forming surface (20) of the molding jaw, preferably formed in a lower region of the inner forming surface, or has several inner openings (U1-E) into the inner forming surface (20) of the molding jaw, preferably one, some or each of them formed in the lower half section of the molding jaw; and/or (iii) that in embodiments according to alternative b) of the main claim 1 It is provided that the upper long vacuum channel (O2) has one or more internal inlets (O2-E) into the inner mold surface (20), preferably one, several or each of them formed in a region of the inner mold surface in the lower half section of the mold jaw and/or preferably at least one in a area of the inner mold surface (20) formed in the upper half section of the mold jaw; and/or (iv) that in embodiments according to alternative c) of the main claim 1 It is provided that the lower long vacuum channel (U2) has one or more internal inlets (U2-E) into the inner mold surface (20), preferably one, several or each of them formed in a region of the inner mold surface in the upper half section of the mold jaw and/or preferably at least one formed in a region of the inner mold surface (20) in the lower half section of the mold jaw.
4. Device according to one of the preceding claims, characterized in that (i) in embodiments according to alternative b) of the main claim 1 It is provided that the upper long vacuum channel (O2), which has an outer channel inlet (O2-S) at one end, preferably at its upper end, on the top of the mold jaw, preferably its only outer channel inlet on the outside of the mold jaw, and has a connecting opening (O2-V) extending through the parting surface (100) of the mold jaw in the region of its opposite, preferably lower, end for connection to a vacuum channel in a mold jaw of the mold jaw pair adjacent in the molding section, wherein it is preferably provided that the upper long vacuum channel (O2) has a further connecting opening (O2-V) extending through the parting surface (100) of the mold jaw in the region of its upper end near its outer channel inlet (O2-S) for connection to a vacuum channel in the mold jaws of the mold jaw pair adjacent in the molding section, and/or (ii) that in embodiments according to alternative c) of the main claim 1 It is provided that the lower long vacuum channel (U2), which in the region of one end, preferably in the region of its lower end, has an outer channel inlet (U2-S) on the underside of the molding jaw, preferably its only outer channel inlet on the outside of the molding jaw, and in the region of its opposite end, preferably upper end, has a connecting opening (U2-V) extending through the parting surface (100) of the molding jaw for connection with a vacuum channel in the adjacent molding jaws of the molding jaw pair in the molding section, wherein it is preferably provided that the lower long vacuum channel (U2) has in the region of its lower end, preferably near its outer channel inlet (U2-S), a further connecting opening (U2-V) extending through the parting surface (100) of the molding jaw for connection with a vacuum channel in the adjacent molding jaws of the molding jaw pair in the molding section.
5. Device according to one of the preceding claims, characterized in that (i) in embodiments according to alternative b) of the main claim 1 It is provided that the upper long vacuum channel (O2), which has an outer channel inlet (O2-S) on the outside of the molding jaw in the region of its end, preferably its upper end, has an outer channel inlet (O2-S) on the underside of the molding jaw as a further outer channel inlet in the region of its opposite end, preferably its lower end, and in a preferred embodiment it is provided that, in addition to the upper short vacuum channel (O1), a lower short vacuum channel (U1) is formed in the molding jaw, preferably the upper short vacuum channel (O1), the lower short vacuum channel (U1) and the upper long vacuum channel (O2) are formed in a common plane of extension; and/or (ii) that in embodiments according to alternative c) of the main claim 1 It is provided that the lower long vacuum channel (U2), which has an outer channel inlet (U2-S) on the outside of the molding jaw in the region of one end, preferably the lower end, on the underside of the molding jaw, has an outer channel inlet on the top of the molding jaw as a further outer channel inlet in the region of its opposite end, preferably the upper end, and in a preferred embodiment it is provided that an upper short vacuum channel (O1) is formed in the molding jaw in addition to the lower short vacuum channel (U1), preferably the lower short vacuum channel (U1), the upper short vacuum channel (O1) and the lower long vacuum channel (U2) are formed in a common plane of extension.
6. Device according to one of the preceding claims, characterized in that (i) in embodiments according to alternative a) of the main claim 1 It is provided that the upper short vacuum channel (O1) is of the same length as the lower short vacuum channel (U1), preferably both being linear over their entire length and/or having the same diameter; and/or (ii) that in embodiments according to alternative b) of the main claim 1 It is provided that the upper short vacuum channel (O1) is shorter than the upper long vacuum channel (O2) and preferably that the upper short vacuum channel (O1) is linear over its entire length and the upper long vacuum channel (O2) has at least one (iii) that the upper short vacuum channel (O1) is formed with a bend or deflection and is linear over one or more sections of its length, and/or the upper long vacuum channel (O2) has a smaller diameter than the upper long vacuum channel (O2); and/or (iii) that in embodiments according to alternative c) of the main claim 1 It is provided that the lower short vacuum channel (U1) is shorter than the lower long vacuum channel (U2) and preferably that the lower short vacuum channel (U1) is linear over its entire length and the lower long vacuum channel is linear with at least one bend or deflection and only over one or more sections of its length; and/or the lower short vacuum channel (U1) has a smaller diameter than the lower long vacuum channel (U2).
7. Device according to one of the preceding claims, characterized in that (i) in embodiments according to alternative a) of the main claim 1 It is provided that the upper short vacuum channel (O1) and the lower short vacuum channel (U1) extend over most of their length, preferably over their entire length, in a common plane of extension, preferably transverse to the axis (X) of the mold jaw (10); and/or (ii) that in embodiments according to alternative b) of the main claim 1 It is provided that the upper short vacuum channel (O1) and the upper long vacuum channel (O2) extend over a large part of their length, preferably over their entire length, in a common plane of extension, preferably transverse to the axis (X) of the mold jaw (10); and/or (iii) that in embodiments according to alternative c) of the main claim 1 It is provided that the lower short vacuum channel (U1) and the lower long vacuum channel (U2) extend over a large part of their length, preferably over their entire length, in a common plane of extension, preferably transverse to the axis (X) of the mold jaw (10).
8. Device according to one of the preceding claims, characterized in that (i) in embodiments according to alternative a) of the main claim 1 It is provided that the mold jaws have an equal number of upper short vacuum channels (O1) and lower short vacuum channels (U1), wherein the upper short vacuum channels (O1) and the lower short vacuum channels (U1) are arranged in series along the mold jaw axis (X), with each pair of an upper short vacuum channel and a lower short vacuum channel arranged in common planes of extension, which preferably extend transversely to the mold jaw axis (X), wherein the plane of extension is preferably assigned to one of the wave troughs (21) of the inner mold surface (20) arranged one after the other along the mold jaw axis (X), in that the upper short vacuum channel (O1) and the lower short vacuum channel (U1) of the respective plane of extension open into the assigned wave trough (21) of the inner mold surface (20); and/or (ii) that in embodiments according to alternative b) of the main claim 1 It is provided that several upper short vacuum channels (O1) and several upper long vacuum channels (O2) are arranged in equal numbers in the mold jaw, wherein the upper short vacuum channels (O1) and the upper long vacuum channels (O2) are each arranged in rows one behind the other along the mold jaw axis (X), with one upper short vacuum channel and one upper long vacuum channel being arranged in pairs in common planes of extension, which preferably extend transversely to the mold jaw axis (X), wherein it is preferably provided that each plane of extension is assigned one of the wave troughs (21) of the inner mold surface (20) arranged one behind the other along the mold jaw axis (X), in that the upper short vacuum channel (O1) and the upper long vacuum channel (O2) of the respective plane of extension open into the assigned wave trough (21) of the inner mold surface (20); and/or (iii) that in embodiments according to alternative c) of the main claim 1 It is provided that several lower short vacuum channels (U1) and several lower long vacuum channels (U2) are formed in the same number in the mold jaw, wherein the lower short vacuum channels (U1) and the lower long vacuum channels (U2) are each arranged in rows one behind the other along the mold jaw axis (X), and wherein a lower short vacuum channel and a lower long vacuum channel are arranged in pairs in common planes of extension, which preferably extend transversely to the mold jaw axis (X), wherein it is preferably provided that each plane of extension is assigned one of the wave troughs (21) of the inner mold surface (20) arranged one behind the other along the mold jaw axis (X), in that the lower short vacuum channel (U1) and the lower long vacuum channel (U2) of the respective plane of extension open into the assigned wave trough (21) of the inner mold surface (20).
9. Device according to one of the preceding claims, characterized in that the forming jaws (10) in embodiments according to Alternative a) and/or Alternative b) and/or Alternative c) of the main claim 1 are designed in such a mirror-symmetrical manner, preferably mirror-symmetrical to a vertical longitudinal center plane of the forming jaw pairs, i.e., the vertical parting plane (100) of the forming jaws, such that the forming jaws (10) can be used universally as left and right forming jaws; and/or that the forming jaws (10) in embodiments according to alternative a) and/or alternative b) and/or alternative c) of the main claim 1 are designed in such a mirror-symmetrical manner, preferably mirror-symmetrical to a horizontal transverse central plane of the forming jaws, so that the forming jaws (10) in embodiments according to alternative a) of the main claim 1 even when rotated 180° around this plane as forming jaws of the designs according to alternative a) of the main claim 1 are usable, and the forming jaws in designs according to alternative b) of the main claim 1 when rotated 180° around this plane as forming jaws of alternative c) of the main claim 1 are usable, and the forming jaws in designs according to alternative c) of the main claim 1 upon rotation by 180° around this plane as forming jaws of the alternative according to b) of the main claim 1 can be used.
10. Device according to one of the preceding claims, characterized in that in embodiments according to alternative a) of the main claim 1 the forming jaws (10) have as vacuum channels exclusively upper short vacuum channels (O1) and exclusively lower short vacuum channels (U1) and no upper long vacuum channels (O2) and no lower long vacuum channels (U2); and/or that in embodiments according to alternative b) of the main claim 1 the forming jaws (10) have as vacuum channels exclusively upper short vacuum channels (O1) and upper long vacuum channels (O2) and no lower short vacuum channels (U1) and no lower long vacuum channels (U2); and/or that in embodiments according to alternative c) of the main claim 1 the forming jaws (10) have as vacuum channels exclusively lower short vacuum channels (U1) and lower long vacuum channels (U2) and no upper short vacuum channels (O1) and no upper long vacuum channels (O2).
11. Device according to one of the preceding claims, characterized in that the coolant channel (40) and/or the coolant channels (40) extend in the molding jaw from the rear of the molding jaw towards the inner molding surface (20), wherein it is preferably provided that the coolant channel (40) or the coolant channels (40) are designed in the molding jaw to run adjacent to the inner molding surface (20), preferably parallel to the axis (X) of the molding jaw, such that the inner molding surface (20) is cooled over its entire axial extent or at least over a large part of its axial length.
12. device according to one of the Claims 11 , characterized in that in embodiments according to alternative a) of the Claim 1 It is provided that the mesh- and/or grid-like structure of the coolant channel (40) or coolant channels (40) faces the series of upper short vacuum channels (O1), the inner mold surface (20) and the series of lower short vacuum channels (U1) and/or covers them from the rear, and/or that in embodiments according to alternative b) of the Claim 1 It is provided that the mesh- and/or grid-like structure of the coolant channel (40) or coolant channels (40) faces the series of upper long vacuum channels (O2) and/or covers them from the rear, preferably having a projecting foot section that engages the lower end of the upper long vacuum channels (O2), and/or that in embodiments according to alternative c) of the Claim 1 It is provided that the mesh-like and/or grid-like structure of the coolant channel (40) or coolant channels (40) faces the series of lower long vacuum channels (U2) and/or covers them from the rear, preferably having a projecting head section that overlaps the upper end of the lower long vacuum channels (U2).
13. Device according to one of the preceding claims, characterized in that , i) the vacuum device (50) has a movably mounted upper vacuum device (50.2) arranged above the molding section (55), which interacts in the molding section (55) with the channel inlets formed on the upper side of the molding jaws of the vacuum channels formed in the molding jaws, and/or ii) the vacuum device (50) has a movably mounted lower vacuum device (50.1) arranged below the molding section (55), which interacts in the molding section (55) with the channel inlets of the vacuum channels formed on the underside of the molding jaws, wherein it is preferably provided that, in embodiments according to alternative a) of the Claim 1 the vacuum device (50) comprises an upper vacuum device (50.2) according to i) which interacts with the outer channel inlets (O1-S) of the upper short vacuum channels (O1) formed on the top of the mold jaws, and a lower vacuum device (50.1) according to ii) indicates that it interacts with the outer channel inlets (U1-S) of the lower short vacuum channels (U1) formed on the underside of the mold jaws, or - that in embodiments according to alternative b) of the Claim 1 the vacuum device (50) has an upper vacuum device (50.2) according to i) which interacts with the outer channel inlets (O1-S, O2-S) formed on the top of the forming jaws of the upper short vacuum channels (O1) and upper long vacuum channels (O2) and does not have a lower vacuum device (50.1) according to ii), or - that in embodiments according to alternative c) of the Claim 1 the vacuum device (50) has a lower vacuum device (50.1) according to ii) which interacts with the outer channel inlets (U1-S, U2-S) of the lower short vacuum channels (U1) and lower long vacuum channels (U2) formed on the underside of the mold jaws and does not have an upper vacuum device (50.2) according to i).
14. Device according to Claim 13 , characterized in that the upper vacuum device (50.2) has at least one upper vacuum bar (50.2) movably mounted relative to the molding section, and/or the lower vacuum device (50.1) has at least one lower vacuum bar (50.1) movably mounted relative to the molding section, wherein the outer channel inlets of the molding jaws arranged in the molding section (55) each form one or more parallel rows along the molding section (55) and the vacuum bar (50.1, 50.2) has a length corresponding to the length of the molding section (55), and/or corresponds only to a section of the length of the molding section (55), and/or has a width corresponding to one or more rows of the outer channel inlets, wherein it is preferably provided (i) that in embodiments according to alternative a) of the Claim 1 - the upper vacuum bar (50.2) interacts with the outer channel inlets (O1-S) of the upper short vacuum channels (O1) formed on the upper side of the mold jaws, arranged in rows, and - the lower vacuum bar (50.1) interacts with the outer channel inlets (U1-S) of the lower short vacuum channels (U1) formed on the underside of the mold jaws, arranged in rows, and/or (ii) that in embodiments according to alternative b) of the Claim 1 the upper vacuum bar (50.2) interacts with the outer channel inlets (O1-S, O2-S) of the upper short vacuum channels (O1) and upper long vacuum channels (O2) formed on the upper side of the mold jaws, and/or (iii) that in embodiments according to alternative c) of the Claim 1 the lower vacuum bar (50.1) interacts with the outer channel inlets (U1-S, U2-S) of the lower short vacuum channels (U1) and lower long vacuum channels (U2) formed on the underside of the mold jaws, arranged in rows.
15. Device according to Claim 14 , characterized in that the upper vacuum device has only one movably mounted upper vacuum bar (50.2) which is assigned as a common upper vacuum bar (50.2) to the channel inlets formed on the upper side of the left and right forming jaws of the forming section (55), and/or that the lower vacuum device (50.1) has only one movably mounted lower vacuum bar (50.1) which is assigned as a common lower vacuum bar (50.1) to the channel inlets arranged on the underside of the left and right forming jaws of the forming section (55).
16. device according to one of the Claims 13 until 15 , characterized in that the upper vacuum device (50.2), preferably the common upper vacuum bar and/or the lower vacuum device (50.1), preferably the common lower vacuum bar, is/are mounted in a motor-driven and/or sensor-controlled manner so as to be movable between an out-of-service position and an in-service position, wherein the motor-driven and/or sensor-controlled upper vacuum device (50.2) and/or lower vacuum device (50.1), preferably the common upper vacuum bar (50.2) and/or the common lower vacuum bar (50.1), is arranged in the out-of-service position at a distance from the associated channel inlets of the vacuum channels and in the in-service position in an active position, preferably in contact with the associated channel inlets of the vacuum channels.
17. Device according to Claim 16 , characterized in that the movably mounted upper vacuum device (50.2), preferably the common upper vacuum bar (50.2) and/or the movably mounted lower vacuum device (50.1), preferably the common lower vacuum bar (50.1), is/are driven by a motor drive which is controlled by a sensor, wherein the sensor is designed such that the sensor detects the closed state and/or the open state of the forming jaws of the forming line and, in the case of the closed position, switches on the motor drive for movement to the forming line and/or, in the case of the open position, switches off the motor drive.
18. Device according to one of the preceding claims, characterized in that the The forming jaw carrier (11) is permanently coupled to a coolant chain (400) that rotates with the associated rotating slide (5.1), in that each forming jaw carrier (11) has a hose coupling, preferably a coupling nozzle, at the inlet of the coolant inlet channel (44.1) for the permanent connection of a coolant inlet hose of the coolant chain (400), e.g. a connecting hose (400ar) of a coolant outlet line (400a) of the coolant chain (400), and at the outlet of the coolant outlet channel (44.2) a hose coupling, preferably a coupling nozzle, for the permanent connection of a coolant outlet hose of the coolant chain (400), e.g. a connecting hose (400rv) of a coolant return line (400r) of the coolant chain (400).
19. Device according to Claim 18 , characterized in that , for the coolant supply of the coolant chain (400), (i) the coolant chain (400) has a coolant circuit which can be generated by an electric motor-driven coolant pump device independently of the circulation of the coolant chain (400), or (ii) the coolant chain (400) has a coolant circuit which can be generated hydrodynamically by the circulation of the coolant chain (400) in conjunction with a stationary coolant reservoir.
20. Device according to one of the preceding claims, characterized in that the left rotating slide (5.1) of the left forming jaws is arranged to the left of the forming section (55) and the right rotating slide (5.2) of the right forming jaws is arranged to the right of the forming section (55), (i) that the upper vacuum device (50.2), preferably the common upper vacuum bar (50.2), is mounted so as to be movable up and down in the area between the rotating slide (5.1) of the left forming jaws and the rotating slide (5.2) of the right forming jaws above the forming section for the purpose of interacting in the lowered position with the outer channel inlets formed on the upper side of the forming jaws in the forming section, and/or (ii) that the lower vacuum device (50.1), preferably the common lower vacuum bar (50.1), is mounted in the area between the rotating slide (5.1) of the left forming jaws and the rotating slide (5.2) of the right forming jaws below the forming section (55) is mounted so as to be movable up and down in order to cooperate in the raised position with the outer channel inlets formed on the underside of the mold jaws in the molding section.

Description

The invention relates to a device for manufacturing plastic pipes, in particular corrugated plastic pipes. The device comprises an extruder with a die head and a corrugator, into which a plastic melt tube is introduced via the die head to form the plastic tube. In the corrugator, left and right forming jaws are guided by a motor in a continuous rotation of the left forming jaws and in a continuous rotation of the right forming jaws, in a rotating carriage of the left forming jaws and in a rotating carriage of the right forming jaws. In a horizontal forming section, the left and right forming jaws are guided one behind the other in pairs as forming jaw pairs with a vertical parting plane, forming an axially extending, ring-shaped inner forming surface in the forming jaw pair in order to form the plastic tube in the forming jaw pairs along the forming section. In a return of the left forming jaws and in a return of the right forming jaws, the forming jaws are each returned from the end of the forming section to the beginning of the forming section. The forming jaws in the corrugator are cooled via a cooling device by continuously supplying liquid coolant to one or more coolant channels formed in the forming jaws. The forming jaws, which run in pairs in the forming line, are subjected to a vacuum in the area of the inner forming surface of the forming jaw pairs in the sense of extraction, by means of a vacuum device acting on the inner forming surface via vacuum channels formed in the forming jaws by interaction with channel inlets of the vacuum channels formed on the outside of the forming jaws. From the DE 17 04 718 (Hegler) is aware of a device for producing corrugated plastic tubes with a corrugator. The forming jaws, guided in pairs in the horizontal forming section of the corrugator, are designed as left and right forming jaws. The forming jaw pairs have a vertical parting line. Vacuum channels are formed in the forming jaws, opening into the inner forming surface. As the forming jaws move along the forming section, vacuum is extracted from the vacuum channels laterally at the rear of each forming jaw, i.e., on one side of each forming jaw opposite the vertical parting line. During passage through the forming section, the extraction simultaneously cools the forming jaws. From the DE 298 10 317 U1 (Lupke) is aware of a similar device with a corrugator. However, this corrugator does not operate with left and right forming jaws, but rather with upper and lower forming jaws with a horizontal parting line. Vacuum channels are formed in the forming jaws, which are evacuated via an external vacuum device as the forming jaws pass through the forming section. The vacuum channels of the upper forming jaws are connected to the vacuum channels of the lower forming jaws via controllable valves. The evacuation takes place on the upper outer surface of the forming jaws and/or on the lower outer surface of the forming jaws, i.e., opposite the horizontal parting line. The forming jaws are cooled by intermittently blowing cooling air into the vacuum channels as the pairs of forming jaws pass through the forming section. The DE 696 01 509 B2 Corelco also describes a device with a corrugator. Versions with right and left forming jaws and a vertical parting line are described. Vacuum channels are formed in the forming jaws, the outer channel inlets of which are located on the upper side of the forming jaws and are extracted via a vacuum system during the forming process. This is a one-sided extraction system, operating only on the upper side of the forming jaws. The pairs of forming jaws guided in the forming process are cooled from below and laterally during operation. The specific method of this cooling is not described. The UC 210 corrugator marketed by the applicant Unicor GmbH uses left and right forming jaws. Vacuum extraction from the forming jaws in the forming line is performed on one side at the underside. The vacuum channels formed in the forming jaws are located in the lower half of the jaws and run parallel to the parting line. The forming jaws are cooled via coolant channels located in the rear section of the jaws. The invention is based on the objective of further developing a device of the type mentioned at the outset in such a way that the device incorporates forming jaws which are particularly advantageous from a manufacturing perspective, especially simple and/or cost-effective to produce, and/or that the device is particularly advantageous for particularly easy and/or cost-effective, high-quality pipes can be produced. The invention solves this problem with the subject matter of main claim 1. It is essential that the extension area of the vacuum channels is formed in the section of the mold jaw that is bounded by the parting surface of the mold jaw. In connection with this, it is important that the coolant channel(s) is/are located in the rear section of the mold jaw that is bounded by the back of the mol