DE2853492A1 - EQUIPMENT FOR THE MANUFACTURE OF SOCKET PIPES - Google Patents

Description

VEB Kombinat Umformtechnik
"Herbert Warnke" Erfurt

Equipment for the production of socket pipes

field of use

The invention relates to a device for the production of socket pipes made of thermoplastics, the is arranged within an extrusion line.

Characteristics of the known technical solutions

A large number of solutions for the production of socket pipes are already known. The sleeve forming devices used in so-called "in line systems" take the cut to length
extruded pipes, heat their ends in a heating device and transport them to the actual socket and bead molding machine

In DD-PS 90 626 a method is described in which
the end of the drilling is heated during the port movement of the pipe during the extrusion process
Implementation of the method consists of a heating device which can be moved in the feed direction of the pipe and which
takes up the pipe to be deformed and is arranged behind the cutting device · The socket forming device is located behind or next to the heating device · Through the movable
Heater the end of the pipe is heated, the heater after removing the heated pipe in the extrusion axis

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a reversible drive is retracted and dae picks up the next tube for heating · The heated tube is then opened to the side by an ejector device Thrown conveyor belt, which is arranged between the heating device and sleeve forming device. Then will it is captured by a clamping device and enters the socket forming device. After the socket forming process, the pipe is placed on a second conveyor belt and transported away. The disadvantage of this solution is that when occurring Faults in the movable heating car or in the device for the lateral transport of the pipes in the entire extrusion line must be switched off because the heating car is in the extrusion direction and the transport of the pipes with special needs. Since the arrangement of this heater means that it is not possible to insert the pipes from the side, a separate one is required Socket molding with this device is difficult to carry out

In the DT-AS 1 284 079 a socket forming device is described, which consists of a turret-like holding device for the pipes to be muffed, which is a step-by-step driven conveyor has and a row with the holding device aligned heating device for the pipe ends. The introduction station of the conveyor device has a device for introducing the pipes and on one last conveying station a device for transferring the pipes to the muffing device

This device has the disadvantage that it is only suitable for small, thin-walled pipes (pipe diameter <100 mm) is suitable, because with large pipes due to the turret rotating head, the several tubes in storage, the entire extrusion line oversized would have to be. In addition, complicated clamping devices with locking devices are required for this sleeve machine. and opening mechanisms required · Furthermore, socket forming devices are known (DE-OS 2 451 857 and SU-UR 279 032), in which several pipes are transported simultaneously on a conveyor belt and during transport to be heated up

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The heating device required for this is inevitably open and considerable heat losses occur. Another The disadvantage is that it is only suitable for small pipes, due to the large number of side by side lying pipes the transport and heating equipment would reach very large, economically unacceptable dimensions

Object of the invention

The aim of the invention is to reduce the technical and economic outlay, to avoid production disruptions and the space requirement to reduce the entire facility, to achieve short changeover times when changing the pipe diameter, to achieve ease of use to simplify, to increase the output and a separate socket production independent of the extrusion line to enable.

Explain the essence of the invention

The object of the invention is to provide a device for the production of socket pipes, with the during the extrusion time of a pipe, one or more pipes can be heated, lugged and cooled at the same time, which enables the pipes to be inserted from the side for separate operation and short transport routes for the pipes to be socketed.

According to the invention, the object is achieved in that the transport device consists of a double roller conveyor, the one consisting of a roller conveyor for receiving the cut-to-length extruded tube and a roller conveyor for receiving the heated one Rohres consists. The two roller conveyors are arranged parallel to each other and can be synchronized between one another The storage and transport means located in the two roller conveyors are pivoted. Preferably as a filing and transport means provided an inclined plane, the releasable locks and a stop for intermediate positioning the tubes. The heater is un-

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below the extrusion axis at the level of the storage and transport means a arranged between the roller conveyors and the muffle and beading device is located in front of the roller conveyor, the pipe that has already been heated takes up. The roles are connected to one another by a cross strut on which a swivel drive engages. It is also possible that To provide roller conveyors with synchronously operating swivel drives. The roller conveyors consist of roller holders that are connected to each other via a pull rod · The roll holders are fitted with rollers, at least one the rollers of the roller conveyor, which is used to accommodate the already heated pipe, is equipped with a drive, whose V-belt can be swiveled with the roller conveyor · The inclined plane is height-adjustable and has end roof bracket to open and close the locks, as well as a stop that secures the pipe against axial misalignment « Instead of the inclined plane, an endless conveyor belt can also be used. The heating device is for inclusion of the pipe end to be heated is provided with an opening and can be moved in the axial direction Another variant of the heating device is for the simultaneous heating of several tubes while unrolling open on both sides on the inclined plane.

An ejector is arranged on the storage device to take over the ready-socketed and corrugated pipes from the roller conveyor. The heating device, the transport device and the muff and bead device are to reduce the space requirement spatially offset to each other

Execution at apiel

The invention is based on an exemplary embodiment below are explained in more detail. In the accompanying drawing, Pig. 1 shows the side view of the device according to the invention Pig. 2 the top view

Pig. 3 shows a section along the line A - A in Pig. 1 pig. 4 with a section of the device according to the invention

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a stationary heater.

The one in Pig. 1 shown device for the production of socket pipes consists of the assemblies transport device, heating device 17 and socket and beading device 25 and storage device 32 Ci ¹ Ig. 2) together. The transport device consists of a double roller conveyor 2, which is supported by two separate roller conveyor «2 '; 2 "is formed (Pig. 2 and 3). The two roller conveyors 2'j 2" are connected to one another via a cross strut 10 on which the drive 6 engages.

By actuating the band switch 5, the double roller conveyor 2 can be pivoted under the inclined plane 11 by means of the drive 6. It is also possible to provide both roller conveyors 2'ϊ 2 "with separate drives. By appropriate control of the drives also a synchronous pivoting of the roller planes 2'j 2 ^'1 can be achieved. In this variant the transverse strut 10 is no longer required.

Due to its pivotability, the double roller table can be used for different pipe diameters ·. The two roller conveyors 2 '; 2 ″ consist of roller holders 7 in which the rollers 3 are fastened (Pig. 1). As already described, the roller conveyors 2 ¹ ; 2 ″ can be pivoted about the axes of rotation S. All roller holders 7 of a roller conveyor 2'j 2 "are connected to one another by a longitudinal pull rod 9.

An inclined plane 11 is provided for transporting the pipes to be muffed from the roller conveyor 2 ′ to the roller conveyor 2 ^lf and for their intermediate storage and positioning in front of the heating device 17. It is also possible to use an endless conveyor belt instead of the inclined plane 11. On this inclined plane 11 are the limit switches 14 and 16 through which the drives 15 for opening and closing the locks 12 and 13 are operated. The inclined plane 11, which by means of the spindles 33

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is height adjustable, is also provided with stops 20 and 21 for the pipes to be muffed, the stop 20 securing the pipe against axial misalignment (Fig. 1) The heating device 17 is arranged at the same height as the inclined plane 11 which is located below the extrusion axis to save space. It can be moved in the axial direction by means of the drive 18 and the rollers 19 (Pig. 2 and 3). The roller conveyor 2 ″, which is located in the axial direction on the same line as the sleeve and beading device 26 (FIG. 2), is equipped with rollers 3, at least one of which can be driven by the drive 23 and the V-belt 24. the V-belt 24 is ^fl pivotally connected to the roller conveyor. 2 Thereby, the tube whose end was heated in the heater 17, transported to the Muff and bead means 26th This is equipped with a replaceable Muff and beading tool 22 and a replaceable clamping unit 25 The muff and beading device 26 is located in front of the roller conveyor 2 ″, and its height can be set differently according to the application. In the present exemplary embodiment, it is arranged at the level of the extrusion axis. The clamping unit 25 has a drive 28 for closing and opening and a drive 29 for axial movement. In front of the muffing and beading device 26, height-adjustable stationary roller supports 27 can also be arranged. The socket and beading tool 22 can also be cooled. The storage device 32 for the socketed pipes is provided with ejectors 31 which are actuated by the drives 30. Another embodiment variant of the invention is shown in FIG. It is particularly suitable for the extrusion of thin-walled pipes with a small diameter. The extrusion of such pipes leads to very high extrusion speeds and the short extrusion time for a pipe is no longer sufficient to achieve the

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To be able to store, transport, heat and sleeve process steps · The heating device 34 shown in FIG. 4 enables the simultaneous heating of several pipes 1. It is arranged in a stationary manner and is located between the roller conveyors 2 ^f ; 2 "of the double roller conveyor 2.

This heater is with. side openings 35; 36 provided in order to enable a continuous passage of the tubes 1. On the inclined plane 11 is located a limit switch 14 through which the drives 15 for opening and closing the locks 12; 13 are operated Otherwise, the design of these differs The device does not differ from the device described above and shown in FIGS. 1 to 3.

The mode of operation of the device according to the invention for the production of socket pipes is as follows.

The extruded cut-to-length tube 1 is ^{pushed through the following tube 4 into the roller conveyor 2 1 of} the double roller conveyor 2, moving on the rollers 3 and actuating the limit switch 5. As a result, the drive 6 is put into operation and the double roller conveyor 2 is pivoted down into position I by rotating the roller holder 7 about its axis of rotation 8, the tube 1 being deposited on the inclined plane 11 in front of the lock 12. When placing on the inclined plane 11, the tube 1 actuates the limit switch 14, whereby the locks 12; 13 are opened and the tube 1 rolls on the inclined plane into position II. The contact for opening and closing the locks 12; 13 can also be triggered by the pivoting movement of the double roller conveyor 2. During the unwinding, the tube 1 actuates the limit switch 16 and the locks 12; 13 go back to their original position. In position II, the pipe 1 is located directly in front of the heating device 17 and is held by the lock 13. When the tube 1 comes into contact with the lock 13, the double roller conveyor 2 moves back into position

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back to its original position and actuates another switch, which starts the heating device 17 and the The drive 23 for the rollers 3 of the roller conveyor 2 "triggers · If there is no pipe on the roller conveyor 2", so the drive 23 for the rollers 3 is switched off again via a time relay. The heating device 17 moves rests on the rollers 19 and takes the end of the tube 1 to be heated. It is designed so that the heating time can be adapted to the extrusion speed and ensures a continuous production process will. It is only necessary for small, thin-walled pipes because of the high extrusion speeds to use a different heating device, which will be discussed below.

The retraction of the heating device 17 is triggered by actuating the limit switch 5 through the following pipe 4 and the double roller conveyor 2 is pivoted downwards again. The storage of the tube 4 on the inclined plane 11 causes the release of the locks 12; 13 and the tube 1 with the heated end rolls on the inclined plane 11 against the stop 21 and is located directly below the roller conveyor 2 ¹¹ in position III. When the following pipe 4 comes into contact with the lock 13, the double roller conveyor moves, as already described

2 upwards, v / obei the roller conveyor 2 ^{11 takes} the tube 1 with it into position IV. By means of the driven rollers

3, the pipe 1 is transported into the clamping unit 25 of the socket and beading device 26 and immediately before the socket and beading tool 22 stopped and triggers a contact that closes and the axial Forward movement of the clamping unit 25 causes. The heated at one end tube 1 is by the movement of Clamping unit 25 pushed onto the stationary socket and beading tool 22, the socket and bead being formed will. After the shaping has taken place, the

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Clamping unit 25 back again and opens * A contact triggers the opposite movement of the rollers 3 of the roller conveyor 2 "and the tube 1 is moved back into position V (Pig. 2). The ejector 31 lifts the finished, lugged and beaded tube 1 off the roller conveyor 2 ^f1 and it rolls onto the inclined shelf surface of the shelf 32.

How the Pig. 4 shown embodiment variant for thin-walled tubes with a small diameter is the following.

The extruded cut-to-length tube actuates a limit switch as in the variant described above and the double roller conveyor 2 swings down and places the tube 1 on the inclined plane 11, pushing the limit switch 14 downwards and releasing the locks 12 and 13 pipes lying on the inclined plane one position further and several pipes are heated at the same time. The Eontakt the final ready-heated tube, which is rolled on the roller conveyor 2 ", causes the stopper 21 to close the locks 12 and 13 · This pivots the double roller gear is already heated tube on the roller conveyor 2 ^fI, back up The roller conveyor 2 ^f can accommodate the next pipe and the ^{pipe lying on the roller conveyor 2 1} · is lugged and reaches the storage device as has already been described in detail for the variant shown in FIGS. 1 to 3.

The device according to the invention for the production of socket pipes has the advantage that it's through a constructive simple and clear structure and all essential assemblies for the operating personnel are easily accessible. It only requires a very small amount of space, as the individual assemblies are spatially are offset from one another and are therefore particularly suitable for "in-line systems". The pipe transport within the facility is done with simple means and

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due to the design and arrangement according to the invention very short transport routes could be achieved for the individual assemblies. Another part of the gate is the universal one Applicability of the device for large and small pipes of various diameters and wall thicknesses. The necessary Changeover times could be reduced significantly. By using different heating devices, a heat supply adapted to the wall thickness and the diameter of the pipe takes place, so that large energy losses are avoided will. In addition, the disruptive factors that are located in the extrusion axis in conventional systems have been eliminated eliminated, so that the device according to the invention is much less susceptible to failure.

With this device it is also possible to re-shuffle pipes and thus to ensure a separate operation «

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Claims (10)

ft
Invention claim β / Device for the production of socket pipes, consisting of a device for receiving and further transporting the cut-to-length extruded pipes, a heating device for heating a pipe end, a muff and beading device and a storage device, characterized in that the transport device consists of a double roller conveyor (2), which consists of a roller conveyor (2 ¹ ) for receiving the cut-to-length extruded tube (1) and a roller conveyor (2 ¹¹ ) for receiving the heated tube (1), and the two roller conveyors (2 '; 2 ") are arranged parallel to one another and synchronously under a storage and transport means located between the two roller conveyors (2'ί2 "), preferably .einer inclined plane (11), are pivotable, the inclined plane (11) with releasable locks (12; 13) and a stop (21) is provided for the interim positioning of the tubes (1), and that the heating device (17) below the extrusion axis at the level of the storage and tra nport means is arranged between the roller tables (2 *; 2 ^ri ), and that the sleeve and beading device (26) is arranged in front of the roller table (2 ^lf ) 2. Device according to item 1, characterized in that the roller conveyors (2 ^t ; 2V ^l ) are connected to one another by a cross strut (10) on which a pivot drive (6) engages. 3. Device according to item 1, characterized in that the roller conveyors (2 ^l ; 2 ^fl ) are connected to synchronously operating swivel drives (6). 4. Device according to items 1 to 3, characterized in that the roller conveyors (2 ^f ; 2 ^ft ) consist of roller holders (7) which are connected to one another via a tie rod (9) and have rollers (3), at least one 9098.3-5 / OS 1 Γ * ίί * the rollers 3 of the roller conveyor (2 ^lf ) is provided with a drive (23) whose V-belt (24) can be pivoted ^{with the roller conveyor (2 fl)} 5. Device according to points 1 to 4 »characterized by that the inclined plane (11) is adjustable in height and limit switches (14; 16) to open and close the Locks (12; 13) and a stop (20) 6. Device according to items 1 to 4, characterized in that instead of the inclined plane (11) an endless one Conveyor belt is provided 7 device according to points 1 to 6, characterized in that that the heating device (17) for receiving the pipe end to be heated has an opening and in an axial direction Direction can be moved 8. Device according to items 1 to 6, characterized in that that the heating device (17) for the simultaneous heating of several tubes (1) during unwinding the inclined plane (11) is open on both sides. 9 · Device according to items 1 to 8, characterized in that ejectors (31) are arranged on the depositing device for taking over the ready-to-use socketed and corrugated pipes (1) from the roller conveyor (2 ^11). 10. Device according to items 1 to 9, characterized in that that the heating device (17), the transport device, the sleeve and beading device (26) are spatially offset are arranged to each other 909835 / 0B11