Double-layer co-extruder for cable processing

Abstract

The utility model discloses a double-layer co-extrusion machine for cable processing, which comprises a double-layer co-extrusion frame, discharge pipes are arranged at discharge ports of two extrusion cylinders at the upper end of the double-layer co-extrusion frame, a double-layer co-extrusion head is arranged between the two discharge pipes, and the double-layer co-extrusion machine further comprises a connecting mechanism; the connecting mechanism comprises connecting pipes, sliding grooves, limiting plates, limiting rings, corrugated pipes and receding sliding grooves, the receding sliding grooves are formed in the outer side face of the double-layer co-extrusion head, the connecting pipes are slidably connected into the receding sliding grooves, and the corrugated pipes are arranged between the connecting pipes and a feeding port of the double-layer co-extrusion head. Through transmission connection between the limiting parts, the limiting states of the two discharging pipes can be controlled at the same time, rapid disassembly and assembly between the discharging pipes and the double-layer co-extrusion head are facilitated, replacement of the extrusion head of the double-layer co-extrusion machine is more convenient and rapid, and the double-layer co-extrusion machine meets the machining requirements of cables of different sizes.

Description

Technical Field

[0001] This utility model relates to the field of cable processing technology, specifically to a double-layer co-extrusion machine for cable processing. Background Technology

[0002] Cable processing refers to the process of processing raw materials into cable products of specified specifications. It is one of the important links in cable manufacturing. The cable processing process includes multiple steps such as raw material preparation, extrusion molding, insulation, braiding, sheathing, and printing. In the extrusion molding process of cables, in order to improve processing efficiency, a double-layer extruder is used to extrude two material layers simultaneously. In the prior art, the authorized publication number CN 220242321 U proposes a double-layer co-extrusion extrusion device for cable processing, including: a base plate, on the upper surface of which a first extruder is fixedly connected, and a first discharge pipe is provided on the outer surface of the first extruder; a second extruder is fixedly connected to the upper surface of the base plate, and a second discharge pipe is provided on the outer surface of the second extruder; and a support assembly, which is fixedly connected to the upper surface of the base plate near the left side of the first extruder. In this solution, the discharge pipe and the co-extrusion fixture are directly connected. When different sizes of cables need to be processed, different co-extrusion fixtures need to be changed. The disassembly and assembly of the discharge pipe and the co-extrusion fixture takes a lot of time and is inconvenient to use. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a double-layer co-extrusion machine for cable processing. Through the transmission connection between the limiting components, the limiting state of the two discharge pipes can be controlled simultaneously, which facilitates the quick assembly and disassembly of the discharge pipes and the double-layer co-extrusion head, making the replacement of the extrusion head of the double-layer co-extrusion machine more convenient and faster. It is suitable for the processing needs of cables of different sizes and can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a double-layer co-extrusion machine for cable processing, comprising a double-layer co-extrusion frame, wherein each of the two extrusion cylinders at the upper end of the double-layer co-extrusion frame is provided with a discharge pipe, and a double-layer co-extrusion head is provided between the two discharge pipes, and further comprising a connecting mechanism;

[0005] The connecting mechanism includes a connecting pipe, a chute, a limiting plate, a limiting ring, a corrugated pipe, and a clearance chute. The clearance chute is located on the outer side of the double-layer co-extrusion head. The connecting pipe is slidably connected to the inside of each clearance chute. A corrugated pipe is provided between the connecting pipe and the feed inlet of the double-layer co-extrusion head. The inner arc surface of the connecting pipe is provided with a chute. The inside of each chute is slidably connected with a limiting plate. All limiting plates move synchronously. The limiting ring is located at the outer arc end of the discharge pipe. The limiting ring and the limiting plate are installed together. Through the transmission connection between the limiting components, the limiting status of the two discharge pipes can be controlled simultaneously, which facilitates quick disassembly and assembly between the discharge pipe and the double-layer co-extrusion head. This makes the replacement of the double-layer co-extrusion head more convenient and faster, and adapts to the processing needs of cables of different sizes.

[0006] Furthermore, the connecting mechanism also includes sealing gaskets, which are respectively disposed on the inner wall of the connecting tube near the center of the double-layer co-extrusion head to seal the connection tube and the discharge tube.

[0007] Furthermore, the limiting plate includes a top pressure plate, a top column, a spring, and a sliding groove. The top pressure plate is slidably connected to the inside of the sliding groove. The side of the top pressure plate near the center of the connecting pipe is provided with a sliding groove. The inside of the sliding groove is slidably connected with a top column. A spring is provided between the top column and the inner wall of the sliding groove. A top plate is provided at the end of the top column near the center of the connecting pipe to limit the position of the discharge pipe inside the connecting pipe.

[0008] Furthermore, the connecting mechanism also includes a driving assembly, which includes a turntable, a worm gear, and a worm. The turntable is rotatably connected to the outer arc surface of the connecting pipe. The sliding pins on the lower surface of the top pressure plate pass through the sliding holes on the surface of the connecting pipe and are slidably connected to the interior of the planar spiral groove on the surface of the turntable. The outer arc surface of the turntable is provided with a worm gear. The worm is rotatably connected to the rotating frame on the outer side of the connecting pipe. The worm meshes with the adjacent worm gear to synchronously adjust the position of the top pressure plate in the same connecting pipe.

[0009] Furthermore, the drive assembly also includes an external hexagonal prism and bevel gears. The external hexagonal prisms are rotatably connected to the inside of the double-layer co-extrusion head, and the worm gears are slidably connected to the outer arc surface of the external hexagonal prisms. Each end of the external hexagonal prism is provided with a bevel gear, and the two bevel gears mesh to synchronously adjust the position of all the top pressure plates.

[0010] Furthermore, the drive assembly also includes a knob, which is located at the upper end of the vertical outer hexagonal column. The knob is situated on the upper surface of the double-layer co-extrusion head, facilitating rotation of the outer hexagonal column.

[0011] Furthermore, the inner arc surface of the connecting tube is provided with sponge at the end away from the center of the double-layer co-extrusion head to fill the space between the connecting tube and the discharge tube.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This double-layer co-extrusion machine for cable processing has the following advantages:

[0013] Through the transmission connection between the limiting components, the limiting status of the two discharge pipes can be controlled simultaneously, which facilitates the quick assembly and disassembly of the discharge pipes and the double-layer co-extrusion head, making the replacement of the double-layer co-extrusion head more convenient and faster, and adapting to the processing needs of cables of different sizes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a structural schematic diagram of the rear cross-section of the double-layer co-extrusion head of this utility model;

[0016] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0017] Figure 4 This is a schematic diagram of the connection mechanism of this utility model.

[0018] In the diagram: 1 Double-layer co-extrusion frame, 2 Discharge pipe, 3 Double-layer co-extrusion head, 4 Connecting mechanism, 41 Connecting pipe, 42 Slide groove, 43 Limiting plate, 431 Top pressure plate, 432 Top column, 433 Spring, 434 Sliding groove, 44 Limiting ring, 45 Sealing gasket, 46 Drive assembly, 461 Turntable, 462 Worm gear, 463 Worm, 464 External hexagonal column, 465 Bevel gear, 466 Knob, 47 Bellows, 48 ​​Relief slide groove, 5 Sponge pad. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4This embodiment provides a technical solution: a double-layer co-extrusion machine for cable processing, including a double-layer co-extrusion frame 1. The upper end of the double-layer co-extrusion frame 1 is provided with a double-layer co-extrusion structure, which adopts the double-layer co-extrusion structure commonly used in the prior art. Its structure mainly includes a feeding system: consisting of a hopper, a feeder, and a feeding cylinder, responsible for smoothly feeding plastic granules into the interior of the extruder; a melting system: consisting of twin screws, a heating coil, and a screw barrel, which heats and melts the plastic granules through rotational motion and heating; an extrusion system: consisting of a screw barrel and an extrusion plate, which extrudes the molten plastic from one end to the other end; a control system: consisting of an electrical cabinet and a control panel, which realizes the function of human-machine interactive control. The two extrusion cylinders at the upper end of the double-layer co-extrusion frame 1 are provided with discharge pipes 2 to transport the extruded material. A double-layer co-extrusion head 3 is provided between the two discharge pipes 2 to guide the double-layer co-extrusion of two raw materials. It also includes a connecting mechanism 4.

[0021] Connecting mechanism 4 includes a connecting pipe 41, a chute 42, a limiting plate 43, a limiting ring 44, a corrugated pipe 47, and a clearance chute 48. The clearance chute 48 is located on the outer surface of the double-layer co-extrusion head 3. A connecting pipe 41 is slidably connected inside each clearance chute 48. A corrugated pipe 47 is provided between each connecting pipe 41 and the feed inlet of the double-layer co-extrusion head 3. A chute 42 is provided on the inner arc surface of each connecting pipe 41. A limiting plate 43 is slidably connected inside each chute 42. All limiting plates 43 move synchronously. The limiting ring 44 is located at the outer arc end of the discharge pipe 2. The limiting ring 44 is installed in conjunction with the limiting plate 43. By moving all the limiting plates 43 together, the limiting state of the limiting ring 44 is changed. When the limiting ring 44 is in a hard limiting state, the discharge is restricted. Pipe 2 exits from the connecting pipe 41, maintaining the connection between the discharge pipe 2 and the double-layer co-extrusion head 3. When the limiting ring 44 is in an elastic limiting state, simply move the double-layer co-extrusion head 3. Affected by the position of the discharge pipe 2, it slides in the groove 42 through the connecting pipe 41, providing space for the movement of the double-layer co-extrusion head 3. The discharge pipes 2 exit from the interior of the connecting pipe 41, canceling the connection between the double-layer co-extrusion head 3 and the discharge pipe 2, and replacing the double-layer co-extrusion head 3. After replacement, simply repeat the above operation in reverse to quickly connect the two discharge pipes 2 to the double-layer co-extrusion head 3. The connecting mechanism 4 also includes sealing gaskets 45, which are respectively set on the inner wall of the connecting pipe 41 near the center of the double-layer co-extrusion head 3 to seal between the connecting pipe 41 and the discharge pipe 2. Limiting plate 4 3 includes a top pressure plate 431, a top column 432, a spring 433, and a sliding groove 434. The top pressure plate 431 is slidably connected to the inside of the sliding groove 42. Each side of the top pressure plate 431 near the center of the connecting pipe 41 is provided with a sliding groove 434. The top column 432 is slidably connected inside each sliding groove 434. A spring 433 is provided between the top column 432 and the inner wall of the sliding groove 434. Each end of the top column 432 near the center of the connecting pipe 41 is provided with a top plate. When the top pressure plate 431 moves and contacts the outer arc surface of the discharge pipe 2 through the top plate at the end of the top column 432, the spring 433 is in a contracted state. The top pressure plate 431 blocks the movement of the limiting ring 44, and the limiting ring 44 is in a hard limiting state. When the top pressure plate 431 moves away from the discharge pipe 2... When the device reaches its limit position, under the elastic force of the spring 433, the top plate of the top column 432 contacts the outer arc surface of the discharge pipe 2, and the limiting ring 44 is in an elastic limiting state. The connecting mechanism 4 also includes a drive assembly 46, which includes a turntable 461, a worm gear 462, and a worm 463. The turntable 461 is rotatably connected to the outer arc surface of the connecting pipe 41. The sliding columns on the lower surface of the top pressure plate 431 pass through the sliding holes on the surface of the connecting pipe 41 and are slidably connected to the inside of the planar spiral groove on the surface of the turntable 461. The outer arc surface of the turntable 461 is provided with worm gears 462. The worms 463 are rotatably connected to the rotating frame on the outer side of the connecting pipe 41. The worms 463 are meshed with the adjacent worm gears 462. The drive assembly 46 also includes an external hexagonal column 464 and a bevel gear 465.The outer hexagonal prisms 464 are rotatably connected to the inside of the double-layer co-extrusion head 3, and the worm gears 463 are slidably connected to the outer arc surfaces of the outer hexagonal prisms 464. The worm gears 463 and the outer hexagonal prisms 464 can only slide relative to each other. Each end of the outer hexagonal prism 464 is provided with a bevel gear 465, and the two bevel gears 465 are meshed together. The drive assembly 46 also includes a knob 466, which is located at the upper end of the vertical outer hexagonal prisms 464. The knob 466 is located on the upper surface of the double-layer co-extrusion head 3. By rotating the vertical outer hexagonal prisms 464 through the knob 466, the two outer hexagonal prisms 464 are rotated synchronously through the meshing connection of the two bevel gears 465. The relative sliding of the outer hexagonal prism 464 restricts the relative rotation of the outer hexagonal prism 464 and the worm 463, causing the two worms 463 to rotate synchronously. Through the meshing connection between the worm 463 and the worm wheel 462, the worm wheel 462 drives the turntable 461 to rotate. The sliding column of the top pressure plate 431 slides within the planar spiral groove of the turntable 461, causing the top pressure plate 431 to gradually move away from the discharge pipe 2. All the top pressure plates 431 move synchronously. A sponge 5 is provided at the end of the inner arc surface of the connecting pipe 41 away from the center of the double-layer co-extrusion head 3 to fill the space between the inner arc surface of the connecting pipe 41 and the outer arc surface of the discharge pipe 2, preventing external dust from entering the interior of the connecting pipe 41.

[0022] The working principle of the double-layer co-extrusion machine for cable processing provided by this utility model is as follows: During the cable processing, the discharge pipe 2 is inserted into the connecting pipe 41. The top pressure plate 431 contacts the outer arc surface of the discharge pipe 2 through the top plate at the end of the top column 432. The spring 433 is in a contracted state, and the top pressure plate 431 blocks the movement of the limiting ring 44. The limiting ring 44 is in a hard limiting state, preventing the discharge pipe 2 from being pulled out of the connecting pipe 41, so that the limiting ring 44 fits with the sealing gasket 45, sealing the discharge pipe 2 and the connecting pipe 41. The cable raw material is poured into the screw barrel of the double-layer co-extrusion frame 1, and the raw material is processed by the screw... The material inside the barrel is heated to a molten state and then extruded from the discharge pipe 2. Through the connecting pipe 41 and the corrugated pipe 47, the two extruded raw materials enter the inner and outer channels of the double-layer co-extrusion head 3 respectively. The double-layer co-extrusion head 3 achieves the co-extrusion of the two raw materials in two layers. During the use of the double-layer co-extrusion machine, based on the needs of cable processing, when replacing the double-layer co-extrusion head 3, first rotate the vertical outer hexagonal column 464 by knob 466. Through the meshing connection of two bevel gears 465, the two outer hexagonal columns 464 rotate synchronously. The relative sliding between the worm gear 463 and the outer hexagonal columns 464 restricts the movement of the outer hexagonal columns 464. The relative rotation of worm 463 and worm gear 464 causes the two worm gears 463 to rotate synchronously. Through the meshing connection between worm gear 463 and worm wheel 462, worm wheel 462 drives turntable 461 to rotate. The sliding column of top pressure plate 431 slides in the planar spiral groove of turntable 461, causing top pressure plate 431 to gradually move away from discharge pipe 2. All top pressure plates 431 move synchronously. At this time, under the elastic force of spring 433, the top plate of top column 432 is kept in contact with the outer arc surface of discharge pipe 2. When the top pressure plate 431 moves away from discharge pipe 2 to the limit position, it stops moving. At this time, limit ring 44 is in an elastic limit state. In this state, the double-layer co-extrusion head 3 can be moved directly. Affected by the position of the discharge pipe 2, it slides in the chute 42 through the connecting pipe 41, providing space for the movement of the double-layer co-extrusion head 3. At the same time, the limiting ring 44 overcomes the elastic force of the spring 433 and applies a force to the conical arc surface of the top plate of the top column 432, pushing the top column 432 to slide, providing space for the movement of the discharge pipe 2, so that the two discharge pipes 2 leave the interior of the connecting pipe 41 respectively, canceling the connection between the double-layer co-extrusion head 3 and the discharge pipe 2, and replacing the double-layer co-extrusion head 3. After the replacement is completed, the above operation can be repeated in reverse to quickly connect the two discharge pipes 2 to the double-layer co-extrusion head 3.

[0023] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A double-layer co-extrusion machine for cable processing, comprising a double-layer co-extrusion frame (1), wherein each of the two extrusion cylinder outlets at the upper end of the double-layer co-extrusion frame (1) is provided with a discharge pipe (2), and a double-layer co-extrusion head (3) is provided between the two discharge pipes (2), characterized in that: It also includes a connecting mechanism (4); Connection mechanism (4): It includes a connecting pipe (41), a chute (42), a limiting plate (43), a limiting ring (44), a corrugated pipe (47), and a clearance chute (48). The clearance chute (48) is respectively set on the outer side of the double-layer co-extrusion head (3). The connecting pipe (41) is slidably connected inside the clearance chute (48). A corrugated pipe (47) is provided between the connecting pipe (41) and the feed port of the double-layer co-extrusion head (3). The inner arc surface of the connecting pipe (41) is provided with a chute (42). The inside of the chute (42) is slidably connected with a limiting plate (43). All the limiting plates (43) move synchronously. The limiting ring (44) is respectively set at the end of the outer arc surface of the discharge pipe (2). The limiting ring (44) and the limiting plate (43) are installed together.

2. The double-layer co-extrusion machine for cable processing according to claim 1, characterized in that: The connecting mechanism (4) also includes a sealing gasket (45), which is disposed on the inner wall of the connecting tube (41) near the center of the double-layer co-extrusion head (3).

3. The double-layer co-extrusion machine for cable processing according to claim 1, characterized in that: The limiting plate (43) includes a top pressure plate (431), a top column (432), a spring (433), and a sliding groove (434). The top pressure plate (431) is slidably connected to the inside of the sliding groove (42). The side of the top pressure plate (431) near the center of the connecting pipe (41) is provided with a sliding groove (434). The inside of the sliding groove (434) is slidably connected with a top column (432). A spring (433) is provided between the top column (432) and the inner wall of the sliding groove (434). The end of the top column (432) near the center of the connecting pipe (41) is provided with a top plate.

4. The double-layer co-extrusion machine for cable processing according to claim 3, characterized in that: The connecting mechanism (4) further includes a driving assembly (46), which includes a turntable (461), a worm gear (462), and a worm (463). The turntable (461) is rotatably connected to the outer arc surface of the connecting pipe (41). The sliding column on the lower surface of the top pressure plate (431) passes through the sliding hole on the surface of the connecting pipe (41) and is slidably connected to the inside of the planar spiral groove on the surface of the turntable (461). The outer arc surface of the turntable (461) is provided with a worm gear (462). The worm (463) is rotatably connected to the rotating frame on the outer side of the connecting pipe (41). The worm (463) meshes with the adjacent worm gear (462).

5. A double-layer co-extrusion machine for cable processing according to claim 4, characterized in that: The drive assembly (46) also includes an external hexagonal column (464) and a bevel gear (465). The external hexagonal column (464) is rotatably connected to the inside of the double-layer co-extrusion head (3), and the worm gear (463) is slidably connected to the outer arc surface of the external hexagonal column (464). The ends of the external hexagonal column (464) are provided with bevel gears (465), and the two bevel gears (465) are meshed together.

6. A double-layer co-extrusion machine for cable processing according to claim 5, characterized in that: The drive assembly (46) also includes a knob (466), which is located at the upper end of the vertical external hexagonal column (464) and on the upper surface of the double-layer co-extrusion head (3).

7. A double-layer co-extrusion machine for cable processing according to claim 1, characterized in that: The inner arc surface of the connecting tube (41) is provided with a sponge (5) at the end away from the center of the double-layer co-extrusion head (3).

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