Modified polyester elastomer multilayer coextrusion die

Abstract

A modified polyester elastomer multilayer co-extrusion die, the die body is composed of a distribution area die, a compression area die and a forming area die, the distribution area die, the compression area die and the forming area die are fixedly connected through quick disassembly and assembly devices, the distribution area die is provided with a distribution area distribution channel, the compression area die is provided with a compression area first flat channel, a compression area distribution channel and a compression area second flat channel, second elastic sealing gaskets are fixedly arranged on the outer walls of the two ends of the compression area die, the forming area die is provided with a forming area flat channel, a forming area distribution channel and a forming area composite channel, the second flow guide plates fixedly arranged around the distribution area distribution channel extend into the compression area first flat channel, the first flow guide plates fixedly arranged around the compression area second flat channel extend into the forming area flat channel, the multilayer co-extrusion die adopts a split structure design, and the problems of traditional integral three-layer co-extrusion die, such as difficult installation and disassembly, high damage maintenance cost, etc. are solved.

Description

Technical Field

[0001] This utility model relates to the field of multilayer co-extrusion die technology, specifically to a modified polyester elastomer multilayer co-extrusion die. Background Technology

[0002] In the production of modified polyester elastomers, multilayer co-extrusion is a common processing method, enabling the extrusion of different functional layers or different materials to meet diverse product performance requirements. Traditional three-layer co-extrusion dies are basically designed as a single unit, which includes a flow distribution zone, a compression zone, and a forming zone, enabling the co-extrusion of multiple materials. However, this type of single-unit three-layer co-extrusion die has problems such as inconvenient installation and disassembly, and long connection time. These disadvantages are particularly prominent when frequent replacement of die components or maintenance and cleaning are required, which seriously affects production efficiency. Moreover, when a traditional single-unit three-layer co-extrusion die is partially damaged, the entire die needs to be replaced, resulting in high costs for enterprises. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a modified polyester elastomer multilayer co-extrusion die head. It adopts a split structure design, which is easy to install and disassemble, and solves the problems of the traditional integral three-layer co-extrusion die head, such as inconvenient installation and disassembly and high maintenance costs.

[0004] The technical solution adopted in this utility model is a modified polyester elastomer multilayer co-extrusion die, including a die body. The die body is composed of a flow dividing die, a compression dividing die, and a forming dividing die. The flow dividing die and the compression dividing die, as well as the compression dividing die and the forming dividing die, are fixedly connected by a quick-release device of the same structure. The flow dividing die has three flow dividing channels. The compression dividing die has three compression zone first horizontal flow channel, a compression dividing channel, and a compression zone second horizontal flow channel in sequence. Second elastic sealing gaskets are fixed around the outer walls at both ends of the compression dividing die. The forming zone mold head is provided with three forming zone horizontal flow channels, one forming zone flow channel, and one forming zone composite flow channel in sequence. One end of a second guide plate is fixed around the outlet of the flow channel. The extension end of the second guide plate extends into the first horizontal flow channel of the compression zone. A first elastic sealing gasket located below the second guide plate is fixed around the first horizontal flow channel of the compression zone. One end of the first guide plate is fixed around the outlet of the second horizontal flow channel of the compression zone. The extension end of the first guide plate extends into the forming zone horizontal flow channel. A third elastic sealing gasket located below the first guide plate is fixed around the forming zone horizontal flow channel.

[0005] The quick-assembly / disassembly device includes a limiting block and an insertion block. One end of the insertion block is inserted into the limiting block and fixed by a locking screw. The other end of the insertion block is connected to a first short connecting rod, which is connected to a fixed shaft. A rotating sleeve is fitted on the fixed shaft, and the rotating sleeve is connected to a second short connecting rod. The second short connecting rod is connected to the bottom of one end of a protective cover. The other end of the protective cover has a first through hole through which an insertion rod passes. The bottom end of the insertion rod passes through a side plate and connects to a threaded short rod. The threaded short rod is threaded to a fastening nut. The top end of the insertion rod passes through a spring and connects to a lifting handle. The two ends of the spring are respectively fixed to the bottom of the lifting handle and the top of the protective cover. The side plate is fixed to the limiting block.

[0006] The limiting blocks in the two sets of quick assembly and disassembly devices are respectively fixed on the outer walls around the outlet of the flow dividing mold head and the outer walls around the inlet of the forming mold head. The limiting blocks are provided with limiting insertion holes, and an insertion block is inserted into the limiting insertion holes. A first threaded hole is provided above the limiting insertion hole, and a second threaded hole is provided on the insertion block. The first threaded hole and the second threaded hole are threadedly connected to a locking screw.

[0007] The insertion blocks in the two sets of quick assembly and disassembly devices are respectively fixed on the outer walls of both ends of the compression dividing mold head.

[0008] The protective cover is placed on the limiting block, and a nut hole is provided on the bottom of the protective cover, which is located above the locking screw.

[0009] The side plate is provided with a second through hole, and a rod passes through the second through hole.

[0010] The beneficial effects of this utility model are as follows: This utility model is provided with a flow dividing die, a compression dividing die, and a forming dividing die. The flow dividing die and the compression dividing die, as well as the compression dividing die and the forming dividing die, are connected and fixed by the same quick disassembly and assembly device. This solves the problems of inconvenient installation and disassembly, long connection time, and the need to replace the entire die when there is partial damage, which leads to high costs for enterprises.

[0011] In this invention, a first horizontal flow channel and a second horizontal flow channel of the compression zone are respectively provided on both sides of the compression zone flow channel. A second guide plate and a first elastic sealing gasket are provided at the connection between the flow channel and the first horizontal flow channel of the compression zone, which ensures the sealing performance when the flow channel and the first horizontal flow channel of the compression zone are connected, and ensures the normal use effect after the flow dividing die head and the compression dividing die head are connected.

[0012] In this utility model, a molding zone horizontal flow channel is provided on one side of the molding zone flow channel, and a first guide plate and a third elastic sealing gasket are provided at the connection between the compression zone second horizontal flow channel and the molding zone horizontal flow channel to ensure the sealing performance when the compression zone second horizontal flow channel and the molding zone horizontal flow channel are connected, and to ensure the normal use effect after the compression zone die head and the molding zone die head are connected.

[0013] In this invention, a second elastic sealing gasket is provided on the outer walls of both ends of the compression dividing die head to ensure the sealing of the compression dividing die head at the connection with the diversion dividing die head and the forming dividing die head, thus avoiding external interference.

[0014] In this invention, the protective cover inside the quick-release device can provide a certain degree of protection for the locking screws, preventing them from rusting or coming off during long-term use. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the overall structure of this utility model.

[0016] Figure 2 This is a top view of the first through hole and the protective cover of this utility model.

[0017] Figure 3 This is a partial structural schematic diagram of the present invention.

[0018] Figure 4 This is a schematic diagram of the second threaded hole and the insertion block of this utility model.

[0019] Figure 5 This is a schematic diagram of the second through hole and the side plate of this utility model.

[0020] Figure 6 This is a schematic diagram of the connection between the threaded short rod and the insertion rod of this utility model.

[0021] In the diagram: 1. Diverter mold head; 2. Threaded short rod; 3. Side plate; 4. Protective cover; 5. Spring; 6. Lifting handle; 7. Insert rod; 8. Fastening nut; 9. Nut hole; 10. Locking screw; 11. Limiting block; 12. Insertion block; 13. First short connecting rod; 14. Second short connecting rod; 15. Rotating sleeve; 16. Fixed shaft; 17. Compression mold head; 18. Forming mold head; 19. Composite flow channel in the forming zone; 20. Forming... 21. Forming zone horizontal flow channel; 22. Third elastic sealing gasket; 23. First guide plate; 24. Compression zone second horizontal flow channel; 25. Compression zone flow channel; 26. Compression zone first horizontal flow channel; 27. First elastic sealing gasket; 28. Second elastic sealing gasket; 29. ​​Second guide plate; 30. Diversion zone flow channel; 31. First threaded hole; 32. Limiting insertion hole; 33. Second threaded hole; 34. First through hole; 35. Second through hole. Detailed Implementation

[0022] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0023] Referring to the accompanying drawings, a modified polyester elastomer multilayer co-extrusion die includes a die body, which is composed of a flow dividing die 1, a compression dividing die 17, and a forming dividing die 18. The flow dividing die 1 and the compression dividing die 17, as well as the compression dividing die 17 and the forming dividing die 18, are fixedly connected by a quick-release device of the same structure. The flow dividing die 1 has three flow dividing channels 30. The compression dividing die 17 has three compression zone first horizontal flow channels 26, compression dividing flow channels 25, and compression zone second horizontal flow channels 24 arranged sequentially. Second elastic sealing gaskets 28 are fixed around the outer walls at both ends of the compression dividing die 17. The forming dividing die... The head 18 is provided with three forming zone horizontal flow channels 21, forming zone diversion channels 20, and one forming zone composite flow channel 19 in sequence. One end of a second guide plate 29 is fixed around the outlet of the diversion channel 30. The extension end of the second guide plate 29 extends into the first horizontal flow channel 26 of the compression zone. A first elastic sealing gasket 27 located below the second guide plate 29 is fixed around the first horizontal flow channel 26 of the compression zone. One end of a first guide plate 23 is fixed around the outlet of the second horizontal flow channel 24 of the compression zone. The extension end of the first guide plate 23 extends into the forming zone horizontal flow channel 21. A third elastic sealing gasket 22 located below the first guide plate 23 is fixed around the forming zone horizontal flow channel 21.

[0024] The quick disassembly and assembly device includes a limiting block 11 and an insertion block 12. One end of the insertion block 12 is inserted into the limiting block 11 and fixed by a locking screw 10. The other end of the insertion block 12 is connected to a first short connecting rod 13. The first short connecting rod 13 is connected to a fixed shaft 16. A rotating sleeve 15 is fitted on the fixed shaft 16. The rotating sleeve 15 is connected to a second short connecting rod 14. The second short connecting rod 14 is connected to the bottom of one end of the protective cover 4. The other end of the protective cover 4 is provided with a first through hole 34. An insertion rod 7 passes through the first through hole 34. The bottom end of the insertion rod 7 passes through a side plate 3 and is connected to a threaded short rod 2. The threaded short rod 2 is threadedly connected to a fastening nut 8. The top end of the insertion rod 7 passes through a spring 5 and is connected to a lifting handle 6. The two ends of the spring 5 are respectively fixed to the bottom of the lifting handle 6 and the top of the protective cover 4. The side plate 3 is fixed to the limiting block 11.

[0025] The limiting blocks 11 in the two sets of quick assembly and disassembly devices are respectively fixed on the outer walls around the outlet of the flow dividing mold head 1 and the outer walls around the inlet of the forming dividing mold head 18. The limiting blocks 11 are provided with limiting insertion holes 32, and insertion blocks 12 are inserted into the limiting insertion holes 32. A first threaded hole 31 is provided above the limiting insertion holes 32, and a second threaded hole 33 is provided on the insertion blocks 12. The first threaded hole 31 and the second threaded hole 33 are threadedly connected to locking screws 10.

[0026] The insertion blocks 12 in the two sets of quick assembly and disassembly devices are respectively fixed on the outer side walls of both ends of the compression dividing mold head 17.

[0027] The protective cover 4 covers the limiting block 11, and the bottom of the protective cover 4 is provided with a nut hole 9, which is located above the locking screw 10.

[0028] The side plate 3 is provided with a second through hole 35, and a rod 7 passes through the second through hole 35.

[0029] When using this modified polyester elastomer multilayer co-extrusion die, the first horizontal flow channel 26 of the compression zone in the compression dividing die 17 is oriented towards the outlet direction of the diversion dividing die 1. Then, the insert block 12 is inserted into the limiting insertion hole 32 on the limiting block 11. Then, the locking screw 10 is screwed into the first threaded hole 31 and the second threaded hole 33 to fix the insert block 12. At this time, the extension end of the second guide plate 29 will be pressed above the first elastic sealing gasket 27. After fixing the insert block 12, rotate the protective cover 4 to make the protective cover 4 move above the limiting block 11. Then, hold the protective cover 4, grasp the lifting handle 6 and lift it upward to raise the insert rod 7. Then, flatten the protective cover 4 and release the lifting handle 6. The insert rod 7 will automatically reset under the action of the spring 5 and the threaded short rod 2 will pass through the second through hole 35 on the side plate 3. Then, tighten the fastening nut 8 on the threaded short rod 2 to stabilize the protective cover 4. The molding dividing die 18 and the compression dividing die 17 are connected in the same way.

[0030] After connecting the flow dividing die 1, the compression dividing die 17, and the forming dividing die 18, the whole assembly can be connected to an external extruder, so that the modified polyester elastomer material passes through the flow dividing die 1, the compression dividing die 17, and the forming dividing die 18 in sequence, and is finally extruded from the composite flow channel 19 in the forming zone to form a three-layer co-extruded product.

[0031] In this invention, a flow dividing die 1, a compression dividing die 17, and a forming dividing die 18 are provided. The flow dividing die 1 and the compression dividing die 17, as well as the compression dividing die 17 and the forming dividing die 18, are connected and fixed by the same quick disassembly and assembly device. This solves the problems of inconvenient installation and disassembly, long connection time, and the need to replace the entire die when there is partial damage in traditional integral three-layer co-extrusion dies, which result in high costs for enterprises.

[0032] In this utility model, a first horizontal flow channel 26 and a second horizontal flow channel 24 of the compression zone are respectively provided on both sides of the compression zone flow channel 25. A second guide plate 29 and a first elastic sealing gasket 27 are provided at the connection between the flow channel 30 and the first horizontal flow channel 26 of the compression zone, which ensures the sealing performance when the flow channel 30 and the first horizontal flow channel 26 of the compression zone are connected, and ensures the normal use effect after the flow channel 1 and the compression zone mold 17 are connected.

[0033] In this utility model, a molding zone horizontal flow channel 21 is provided on one side of the molding zone flow channel 20, and a first guide plate 23 and a third elastic sealing gasket 22 are provided at the connection between the compression zone second horizontal flow channel 24 and the molding zone horizontal flow channel 21 to ensure the sealing performance when the compression zone second horizontal flow channel 24 and the molding zone horizontal flow channel 21 are connected, and to ensure the normal use effect after the compression zone die head 17 and the molding zone die head 18 are connected.

[0034] In this invention, a second elastic sealing gasket 28 is provided on the outer walls of both ends of the compression dividing mold head 17 to ensure the sealing of the compression dividing mold head 17 at the connection with the diversion dividing mold head 1 and the forming dividing mold head 18, and to avoid external interference.

[0035] In this utility model, the protective cover 4 inside the quick disassembly device can provide a certain degree of protection for the locking screw 10, and can prevent the locking screw 10 from rusting or coming off during long-term use.

[0036] The above-described embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all possible implementations. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A modified polyester elastomer multilayer co-extrusion die, comprising a die body, characterized in that: The main body of the die head consists of a flow dividing die head (1), a compression dividing die head (17), and a forming dividing die head (18). The flow dividing die head (1) and the compression dividing die head (17), as well as the compression dividing die head (17) and the forming dividing die head (18), are fixedly connected by a quick-release device of the same structure. The flow dividing die head (1) has three flow dividing channels (30). The compression dividing die head (17) has three compression zone first horizontal flow channels (26), compression dividing channels (25), and compression zone second horizontal flow channels (24) arranged in sequence. The outer walls at both ends of the compression dividing die head (17) are fixed with second elastic sealing gaskets (28). The forming dividing die head (18) has three forming zone horizontal flow channels arranged in sequence. The system includes a flow channel (21), a forming zone flow channel (20), and a forming zone composite flow channel (19). At the outlet of the flow channel (30), one end of a second guide plate (29) is fixed around the perimeter. The extension end of the second guide plate (29) extends into the first horizontal flow channel (26) of the compression zone. A first elastic sealing gasket (27) located below the second guide plate (29) is fixed around the perimeter of the first horizontal flow channel (26) of the compression zone. At the outlet of the second horizontal flow channel (24) of the compression zone, one end of a first guide plate (23) is fixed around the perimeter. The extension end of the first guide plate (23) extends into the horizontal flow channel (21) of the forming zone. A third elastic sealing gasket (22) located below the first guide plate (23) is fixed around the perimeter of the horizontal flow channel (21) of the forming zone.

2. The modified polyester elastomer multilayer co-extrusion die according to claim 1, characterized in that: The quick disassembly and assembly device includes a limiting block (11) and an insertion block (12). One end of the insertion block (12) is inserted into the limiting block (11) and fixed by a locking screw (10). The other end of the insertion block (12) is connected to a first short connecting rod (13). The first short connecting rod (13) is connected to a fixed shaft (16). A rotating sleeve (15) is fitted on the fixed shaft (16). The rotating sleeve (15) is connected to a second short connecting rod (14). The second short connecting rod (14) is connected to one end of the protective cover (4). The protective cover (4) has a first through hole (34) at one end. A rod (7) passes through the first through hole (34). The bottom end of the rod (7) passes through the side plate (3) and connects to a threaded short rod (2). The threaded short rod (2) is threadedly connected to a fastening nut (8). The top end of the rod (7) passes through a spring (5) and connects to a lifting handle (6). The two ends of the spring (5) are respectively fixed to the bottom of the lifting handle (6) and the top of the protective cover (4). The side plate (3) is fixed to the limiting block (11).

3. The modified polyester elastomer multilayer co-extrusion die according to claim 2, characterized in that: The limiting blocks (11) in the two sets of quick disassembly and assembly devices are respectively fixed on the outer walls around the outlet of the diversion mold head (1) and the outer walls around the inlet of the forming mold head (18). The limiting blocks (11) are provided with limiting insertion holes (32), and an insertion block (12) is inserted into the limiting insertion holes (32). A first threaded hole (31) is provided above the limiting insertion holes (32), and a second threaded hole (33) is provided on the insertion block (12). The first threaded hole (31) and the second threaded hole (33) are threaded together with locking screws (10).

4. The modified polyester elastomer multilayer co-extrusion die according to claim 2, characterized in that: The insertion blocks (12) in the two quick assembly and disassembly devices are respectively fixed on the outer side walls of the two ends of the compression dividing mold head (17).

5. The modified polyester elastomer multilayer co-extrusion die according to claim 2, characterized in that: The protective cover (4) is placed on the limiting block (11). The bottom of the protective cover (4) is provided with a nut hole (9), which is located above the locking screw (10).

6. The modified polyester elastomer multilayer co-extrusion die according to claim 2, characterized in that: The side plate (3) is provided with a second through hole (35), and a rod (7) passes through the second through hole (35).

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