Three-layer co-extrusion die
By using a three-layer co-extrusion die design, the problems of excessively large die size and complex piping in traditional die systems are solved. This design enables the extrusion of three-layer flexible hoses and optimizes the die space, resulting in rapid cooling and convenient maintenance.
Patent Information
- Application Number
- CN202422918530.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-28
AI Technical Summary
Traditional extrusion dies, when designed with multiple feed ports, result in larger die sizes, increased floor space, and complex piping.
The three-layer co-extrusion die design is adopted. Through the cooperation of the first extrusion block, the second extrusion block and the third extrusion block, the three-layer hose extrusion is realized by the feed port designed on the same side and the inclined guide wall. The feed port is fixed by the connection of the slot and the block, which reduces the die layout space.
It achieves three-layer flexible tube extrusion, reduces the overall size of the mold, rationally arranges the feed connection pipeline, facilitates disassembly and maintenance, and achieves rapid cooling and shaping through hollow guide pillars.
Smart Images
Figure CN223478289U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of extrusion molds, and in particular to a three-layer co-extrusion mold. Background Technology
[0002] In the design of hose extrusion dies, traditional extrusion dies require multiple openings on their circumference to allow the molding material to pass through, depending on the required number of hose layers. Designing multiple openings on the circumference of the extrusion head results in complex piping connections, necessitating appropriate spacing between the extrusion die and adjacent tooling to prevent piping interference. This increases the overall production line length and floor space required. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a three-layer co-extrusion mold that allows molding material to be introduced from the end face to achieve three-layer extrusion.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a three-layer co-extrusion mold, including a first extrusion block, a second extrusion block, a third extrusion block and a fourth extrusion block, wherein the first extrusion block includes a feed block and a guide post, the feed block is connected to the guide post in the middle, and a first feed port, a second feed port and a third feed port are respectively provided on one side of the feed block;
[0005] The second extrusion block has a first through hole in the middle, the guide post passes through the first through hole and a first forming gap is formed between the two, and a first flow channel is formed between the second extrusion block and the feed block, connecting the first feed port and the first forming gap; the second extrusion block has a fourth feed port and a fifth feed port connected to the second feed port and the third feed port;
[0006] The third extrusion block has a second through hole in the middle, the guide post passes through the second through hole and a second forming gap is formed between the two, and a second flow channel is formed between the third extrusion block and the second extrusion block, which connects the fourth feed port and the second forming gap; the third extrusion block has a sixth feed port that connects to the fifth feed port;
[0007] The fourth extrusion block has a third through hole in the middle, the guide post passes through the third through hole and the two directly form a third forming gap, and a third flow channel is formed between the fourth extrusion block and the third extrusion block, which connects the sixth feed port and the third forming gap.
[0008] Furthermore, the portion of the second extrusion block corresponding to the first flow channel is provided with a first inclined guide wall.
[0009] Furthermore, the portions of the second extrusion block and the third extrusion block corresponding to the second flow channel are respectively provided with a second inclined guide wall.
[0010] Furthermore, the portions of the third extrusion block and the fourth extrusion block corresponding to the third flow channel are respectively provided with a third inclined guide wall.
[0011] Furthermore, the cross-sections of the first, second, and third flow channels gradually decrease along their material flow direction.
[0012] Furthermore, the guide post is hollow.
[0013] Furthermore, the first extrusion block, the second extrusion block, the third extrusion block, and the fourth extrusion block are all interlocked with adjacent extrusion blocks.
[0014] Furthermore, the first extrusion block has a first slot on its feed block, and the second extrusion block has a first locking block that mates with the first slot on the side opposite to the feed block; the second extrusion block has a second slot on the side away from the feed block, and the third extrusion block has a second locking block that mates with the second slot on the side opposite to the second extrusion block; the third extrusion block has a third slot on the side away from the second extrusion block, and the fourth extrusion block has a third locking block that mates with the third slot on the side opposite to the third extrusion block.
[0015] Furthermore, the first slot, the second slot, and the third slot are all annular grooves surrounding the corresponding extrusion block, and the corresponding first block, the second block, and the third block are annular blocks surrounding the corresponding extrusion block; the annular grooves and the annular blocks are all located on the edge of the corresponding extrusion block; a sealing element is provided between the annular grooves and the annular blocks.
[0016] The beneficial effects of this utility model are as follows: through the cooperation between the first extrusion block, the second extrusion block and the third extrusion block, the extrusion of a three-layer hose structure can be realized; wherein the first feed port, the second feed port and the third feed port designed on the same side of the first extrusion block make the feeding part uniform, avoiding the traditional setting of multiple feed ports on the periphery of the extrusion die, which would result in an overall die size that is too large. The above design can reduce the die arrangement space and make the arrangement of the feeding connection pipeline more reasonable. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the three-layer co-extrusion die according to a specific embodiment of the present utility model;
[0018] Label Explanation:
[0019] 1. First extrusion block; 11. Feed block; 12. Guide post; 13. First feed inlet; 14. Second feed inlet; 15. Third feed inlet; 2. Second extrusion block; 21. First through hole; 22. First guide channel; 23. Fourth feed inlet; 24. Fifth feed inlet; 3. Third extrusion block; 31. Second through hole; 32. Second guide channel; 33. Sixth feed inlet; 4. Fourth extrusion block; 41. Third through hole; 42. Third guide channel. Detailed Implementation
[0020] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.
[0021] Please refer to Figure 1 A three-layer co-extrusion die includes a first extrusion block 1, a second extrusion block, a third extrusion block 3 and a fourth extrusion block. The first extrusion block 1 includes a feed block 11 and a guide post 12. The feed block 11 is connected to the guide post 12 in the middle. The feed block 11 is provided with a first feed port 13, a second feed port 14 and a third feed port 15 on one side.
[0022] The second extrusion block has a first through hole 21 in the middle, the guide post 12 passes through the first through hole 21 and a first forming gap is formed between the two, and a first flow channel 22 is formed between the second extrusion block and the feed block 11, which connects the first feed port 13 and the first forming gap; the second extrusion block has a fourth feed port 23 and a fifth feed port 24 connected to the second feed port 14 and the third feed port 15;
[0023] The third extrusion block 3 has a second through hole 31 in the middle, the guide post 12 passes through the second through hole 31 and a second forming gap is formed between the two, and a second flow channel 32 is formed between the third extrusion block 3 and the second extrusion block, which connects the fourth feed port 23 and the second forming gap; the third extrusion block 3 has a sixth feed port 33 that connects to the fifth feed port 24.
[0024] The fourth extrusion block has a third through hole 41 in the middle, the guide post 12 passes through the third through hole 41 and the two directly form a third forming gap, and a third flow channel 42 is formed between the fourth extrusion block and the third extrusion block 3, which connects the sixth feed port 33 and the third forming gap.
[0025] As can be seen from the above description, the beneficial effects of this utility model are as follows: through the cooperation between the first extrusion block 1, the second extrusion block and the third extrusion block 3, the extrusion of a three-layer hose structure can be realized; wherein the first feed port 13, the second feed port 14 and the third feed port 15 designed on the same side of the first extrusion block 1 make the feeding part uniform, avoiding the traditional setting of multiple feed ports on the periphery of the extrusion die, which would result in a larger overall die size. The above design can reduce the die arrangement space and make the arrangement of the feeding connection pipeline more reasonable.
[0026] Furthermore, the portion of the second extrusion block corresponding to the first flow channel 22 is provided with a first inclined guide wall.
[0027] As can be seen from the above description, the design of the first inclined guide wall can guide the flowing raw materials.
[0028] Furthermore, the portions of the second extrusion block and the third extrusion block 3 corresponding to the second guide channel 32 are respectively provided with a second inclined guide wall.
[0029] As can be seen from the above description, the design of the second inclined guide wall can guide the flowing raw materials.
[0030] Furthermore, the portions of the third extrusion block 3 and the fourth extrusion block corresponding to the third flow channel 42 are respectively provided with a third inclined guide wall.
[0031] As can be seen from the above description, the design of the third inclined guide wall can guide the flowing raw materials.
[0032] Furthermore, the cross-sections of the first guide channel 22, the second guide channel 32, and the third guide channel 42 gradually decrease along their material flow direction.
[0033] As can be seen from the above description, by reducing the cross-section of the guide channel, the raw material can be gradually gathered and the required flow rate of raw material can be ensured to flow into the required molding gap to form the required layer thickness.
[0034] Furthermore, the guide post 12 is hollow.
[0035] As can be seen from the above description, the hollow guide post 12 can save mold materials on the one hand, and allow gas to be introduced on the other hand, forming a heat dissipation cavity to quickly cool and shape the formed hose.
[0036] Furthermore, the first extrusion block 1, the second extrusion block, the third extrusion block 3, and the fourth extrusion block are all interlocked with adjacent extrusion blocks.
[0037] As can be seen from the above description, the snap-fit design of the multi-extrusion block allows for easy disassembly and assembly, facilitating subsequent maintenance.
[0038] Furthermore, the first extrusion block 1 has a first slot on its feed block 11, and the second extrusion block has a first locking block that mates with the first slot on the side opposite to the feed block 11; the second extrusion block has a second slot on the side away from the feed block 11, and the third extrusion block 3 has a second locking block that mates with the second slot on the side opposite to the second extrusion block; the third extrusion block 3 has a third slot on the side away from the second extrusion block, and the fourth extrusion block has a third locking block that mates with the third slot on the side opposite to the third extrusion block 3.
[0039] As described above, the connection and fixation between extrusion blocks are achieved by using a combination of slots and blocks, ensuring accurate connection of each feed port.
[0040] Furthermore, the first slot, the second slot, and the third slot are all annular grooves surrounding the corresponding extrusion block, and the first block, the second block, and the third block are annular blocks surrounding the corresponding extrusion block; the annular grooves and the annular blocks are all located on the edge of the corresponding extrusion block; a sealing element is provided between the annular grooves and the annular blocks.
[0041] As described above, the design of the slot and the block at the edge of the corresponding extrusion block allows for quick observation of the matching situation and can be used in conjunction with the sealing element as an external seal to prevent raw materials from flowing out from the gap between the extrusion blocks.
[0042] Reference Figure 1 Embodiment 1 of this utility model is as follows:
[0043] like Figure 1 As shown, the three-layer co-extrusion die of this embodiment includes a first extrusion block 1, a second extrusion block, a third extrusion block 3, and a fourth extrusion block. The first extrusion block 1 includes a feed block 11 and a guide post 12, and the guide post 12 is hollow. The feed block 11 is connected to the guide post 12 in the middle, and a first feed port 13, a second feed port 14, and a third feed port 15 are respectively provided on one side of the feed block 11.
[0044] The second extrusion block has a first through hole 21 in the middle, the guide post 12 passes through the first through hole 21 and a first forming gap is formed between the two, and a first flow channel 22 is formed between the second extrusion block and the feed block 11, which connects the first feed port 13 and the first forming gap; the second extrusion block has a fourth feed port 23 and a fifth feed port 24 connected to the second feed port 14 and the third feed port 15;
[0045] The third extrusion block 3 has a second through hole 31 in the middle, the guide post 12 passes through the second through hole 31 and a second forming gap is formed between the two, and a second flow channel 32 is formed between the third extrusion block 3 and the second extrusion block, which connects the fourth feed port 23 and the second forming gap; the third extrusion block 3 has a sixth feed port 33 that connects to the fifth feed port 24.
[0046] The fourth extrusion block has a third through hole 41 in the middle, the guide post 12 passes through the third through hole 41 and the two directly form a third forming gap, and a third flow channel 42 is formed between the fourth extrusion block and the third extrusion block 3, which connects the sixth feed port 33 and the third forming gap.
[0047] The portion of the second extrusion block corresponding to the first flow channel 22 is provided with a first inclined guide wall. The portions of the second extrusion block and the third extrusion block 3 corresponding to the second flow channel 32 are respectively provided with second inclined guide walls. The portions of the third extrusion block 3 and the fourth extrusion block corresponding to the third flow channel 42 are respectively provided with third inclined guide walls.
[0048] The cross-sections of the first guide channel 22, the second guide channel 32, and the third guide channel 42 gradually decrease along their material flow direction. The first extrusion block 1, the second extrusion block, the third extrusion block 3, and the fourth extrusion block are all interlocked with adjacent extrusion blocks. The first extrusion block 1 has a first slot on its feed block 11; the second extrusion block has a first locking block that engages with the first slot on its side opposite to the feed block 11; the second extrusion block has a second slot on its side away from the feed block 11; the third extrusion block 3 has a second locking block that engages with the second slot on its side opposite to the second extrusion block; the third extrusion block 3 has a third slot on its side away from the second extrusion block; and the fourth extrusion block has a third locking block that engages with the third slot on its side opposite to the third extrusion block 3. The first slot, the second slot, and the third slot are all annular grooves surrounding the corresponding extrusion block; the first locking block, the second locking block, and the third locking block are annular blocks surrounding the corresponding extrusion block; the annular grooves and annular blocks are all located at the edges of the corresponding extrusion blocks; and a sealing element is provided between the annular grooves and the annular blocks.
[0049] In summary, the three-layer co-extrusion die provided by this utility model can realize the extrusion of a three-layer flexible tube through the cooperation between the first extrusion block, the second extrusion block and the third extrusion block; wherein the first feed port, the second feed port and the third feed port designed on the same side of the first extrusion block make the feeding part uniform, avoiding the traditional setting of multiple feed ports on the periphery of the extrusion die, which would result in an overall die size that is too large. The above design can reduce the die layout space and make the arrangement of the feeding connection pipeline more reasonable.
[0050] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A three-layer co-extrusion die, characterized in that, It includes a first extrusion block, a second extrusion block, a third extrusion block and a fourth extrusion block. The first extrusion block includes a feed block and a guide post. The feed block is connected to the guide post in the middle. The feed block is provided with a first feed port, a second feed port and a third feed port on one side. The second extrusion block has a first through hole in the middle, the guide post passes through the first through hole and a first forming gap is formed between the two, and a first flow channel is formed between the second extrusion block and the feed block, connecting the first feed port and the first forming gap; the second extrusion block has a fourth feed port and a fifth feed port connected to the second feed port and the third feed port; The third extrusion block has a second through hole in the middle, the guide post passes through the second through hole and a second forming gap is formed between the two, and a second flow channel is formed between the third extrusion block and the second extrusion block, which connects the fourth feed port and the second forming gap; the third extrusion block has a sixth feed port that connects to the fifth feed port; The fourth extrusion block has a third through hole in the middle, the guide post passes through the third through hole and the two directly form a third forming gap, and a third flow channel is formed between the fourth extrusion block and the third extrusion block, which connects the sixth feed port and the third forming gap.
2. The three-layer co-extrusion die according to claim 1, characterized in that, The portion of the second extrusion block corresponding to the first flow channel is provided with a first inclined guide wall.
3. The three-layer co-extrusion die according to claim 1, characterized in that, The portions of the second extrusion block and the third extrusion block corresponding to the second flow channel are respectively provided with a second inclined guide wall.
4. The three-layer co-extrusion die according to claim 1, characterized in that, The third extrusion block and the fourth extrusion block are respectively provided with a third inclined guide wall for the portion corresponding to the third flow channel.
5. The three-layer co-extrusion die according to claim 1, characterized in that, The cross-sectional area of the first, second, and third flow channels gradually decreases along their material flow direction.
6. The three-layer co-extrusion die according to claim 1, characterized in that, The guide post is hollow.
7. The three-layer co-extrusion die according to claim 1, characterized in that, The first extrusion block, the second extrusion block, the third extrusion block, and the fourth extrusion block are all interlocked with the adjacent extrusion blocks.
8. The three-layer co-extrusion die according to claim 7, characterized in that, The first extrusion block has a first slot on its feed block, and the second extrusion block has a first locking block that mates with the first slot on the side opposite to the feed block. The second extrusion block has a second slot on the side away from the feed block, and the third extrusion block has a second locking block that mates with the second slot on the side opposite to the second extrusion block. The third extrusion block has a third slot on the side away from the second extrusion block, and the fourth extrusion block has a third locking block that mates with the third slot on the side opposite to the third extrusion block.
9. The three-layer co-extrusion die according to claim 8, characterized in that, The first slot, the second slot, and the third slot are all annular grooves surrounding the corresponding extrusion block, and the corresponding first block, the second block, and the third block are annular blocks surrounding the corresponding extrusion block; the annular grooves and the annular blocks are all located on the edge of the corresponding extrusion block; a sealing element is provided between the annular grooves and the annular blocks.