Thermoplastic polyurethane elastomer water cutting die head

Abstract

The utility model discloses a thermoplastic polyurethane elastomer water cutting die head, and particularly relates to the technical field of granulation, the thermoplastic polyurethane elastomer water cutting die head comprises an extrusion charging barrel used for conveying molten thermoplastic polyurethane elastomer, the extrusion end of the extrusion charging barrel is rotatably connected with a water inlet cover through a hinge, and a water inlet is formed in the water inlet cover; the bottom of the water inlet cover is fixedly communicated with a discharge hopper; an extrusion disc is arranged at the extrusion end of the extrusion charging barrel; a limiting rotating rod is rotationally connected to the middle of the extrusion disc, a pelletizing assembly is detachably connected to the limiting rotating rod and used for pelletizing the thermoplastic polyurethane elastomer extruded through the extrusion disc, a first permanent magnet is detachably connected to the pelletizing assembly, and a second permanent magnet is connected to the water inlet cover through a rotating shaft. The utility model solves the technical problems that the design of a compensation structure for the grain cutter to move forward to the die head is tedious and complicated after the grain cutter at the position of the die head is used for granulating a thermoplastic polyurethane elastomer and is worn, and meanwhile, the grain cutter is inconvenient to disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of granulation, and more specifically, to a thermoplastic polyurethane elastomer water cutting die head. Background Art

[0002] Thermoplastic polyurethane elastomer is also called thermoplastic polyurethane rubber, abbreviated as TPU. It has many excellent properties such as high modulus, high strength, excellent wear resistance, chemical resistance, hydrolysis resistance, high and low temperature resistance and mildew resistance. These good properties make thermoplastic polyurethane elastomer widely used in many fields such as footwear, cables, clothing, automobiles, medicine and health, pipes, films and sheets. Thermoplastic polyurethane elastomer (TPU) is a type of elastomer that can be plasticized by heating. In the processing flow of thermoplastic polyurethane elastomer, the high-temperature molten thermoplastic polyurethane elastomer needs to be fed into the pelletizer, and then the masterbatch particles are prepared. At present, the granulation of thermoplastic polyurethane elastomer is mainly divided into water-cooled drawing, air ring hot cutting and water ring hot cutting.

[0003] When the thermoplastic polyurethane elastomer is being contact pelletized by air ring hot cutting, the pelletizer at the die head position is close to the template pelletizing belt and runs at high speed. After the pelletizer is worn, the pelletizer needs to be advanced toward the die head to compensate for the wear. However, the current compensation structure design of the pelletizer is cumbersome and complicated, and it is not convenient to disassemble the pelletizer. Based on this, the utility model provides a thermoplastic polyurethane elastomer water cutting die head. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a thermoplastic polyurethane elastomer water cutting die head. The technical problem to be solved by the utility model is that after the pelletizer at the current die head position pelletizes the thermoplastic polyurethane elastomer and wears, the compensation structure design of the pelletizer moving forward to the die head is cumbersome and complicated, and it is also inconvenient to disassemble the pelletizer.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a thermoplastic polyurethane elastomer water-cutting die head, comprising an extrusion barrel for conveying molten thermoplastic polyurethane elastomer, the extrusion end of the extrusion barrel is rotatably connected to a water inlet cover through a hinge, the water inlet cover is provided with a water inlet, the bottom of the water inlet cover is fixedly connected to a discharge bucket, and the extrusion end of the extrusion barrel is provided with an extrusion disc;

[0006] The middle part of the extrusion disk is rotatably connected to a limit rotating rod, and the limit rotating rod is detachably connected to a pelletizing assembly, and the pelletizing assembly is used to pelletize the thermoplastic polyurethane elastomer extruded through the extrusion disk. The pelletizing assembly is detachably connected to a permanent magnet 1, and the water inlet cover is connected to a permanent magnet 2 via a rotating shaft, and the permanent magnet 2 and the permanent magnet 1 magnetically repel each other. The water inlet cover is provided with a rotating device for driving the rotating shaft on the permanent magnet 2 to rotate.

[0007] In a preferred embodiment, the water inlet cover and the extrusion barrel are provided with matching door locks.

[0008] In a preferred embodiment, an observation window is provided on the water inlet cover, and a sealing ring is provided at one end of the water inlet cover.

[0009] In a preferred embodiment, the pelletizing assembly includes a knife seat and a plurality of cutters fixedly connected to the knife seat, a positioning sleeve is fixedly passed through the knife seat, the knife seat is plugged into the limiting rotating rod through the positioning sleeve, an extrusion area is provided on the extrusion disk, and the cutter is tightly attached to the extrusion area of ​​the extrusion disk.

[0010] In a preferred embodiment, when the water inlet shield is closed at the extrusion end of the extrusion barrel, a gap is reserved between the first permanent magnet and the second permanent magnet.

[0011] In a preferred embodiment, the end face of the permanent magnet 1 is fixedly connected with an insertion rod, a rubber sleeve is fixedly sleeved on the insertion rod, a socket is opened on the positioning sleeve, and the insertion rod is tightly inserted into the socket through the rubber sleeve.

[0012] Technical effects and advantages of the utility model:

[0013] The utility model discloses a thermoplastic polyurethane elastomer water cutting die head. A pelletizing component is inserted into a limiting rotating rod, a permanent magnet one is assembled on the pelletizing component, and the path of the limiting inserting rod is utilized to reserve movement of the pelletizing component to compensate for wear. By closing a water inlet cover at one end of an extrusion barrel, the permanent magnet one and the permanent magnet two can correspond horizontally and realize the effect of magnetic repulsion. In this way, the pelletizing component can be automatically advanced by magnetic pressure along with the wear, and the rotation of the permanent magnet two can drive the pelletizing component to rotate for pelletizing. Since the pelletizing component adopts an inserted assembly effect and realizes the limiting and rotation of pelletizing by magnetic pressure, the convenience of disassembly of the pelletizing component can be satisfied. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 For this utility model Figure 1 Open view of the water inlet cover.

[0017] Figure 3 For this utility model Figure 1 Schematic diagram of the structure without extrusion barrel and water level sealing door.

[0018] Figure 4 For this utility model Figure 3 Split diagram of .

[0019] The accompanying drawings are marked as follows: 1. extrusion barrel; 2. water inlet cover; 3. water inlet; 4. discharge bucket; 5. extrusion disc; 6. limit rotating rod; 7. pelletizing assembly; 71. knife holder; 72. cutter; 8. permanent magnet one; 9. permanent magnet two; 10. rotating device; 11. observation window; 12. sealing ring; 13. positioning sleeve; 14. insertion rod; 15. rubber sleeve. DETAILED DESCRIPTION

[0020] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Combined with reference Figure 1-Figure 4The utility model provides a thermoplastic polyurethane elastomer water cutting die head, including an extrusion barrel 1 for conveying molten thermoplastic polyurethane elastomer. The extrusion barrel 1 in the present application can adopt the extrusion principle and structure of the existing granulation extruder, so it will not be described in detail here. The extrusion end of the extrusion barrel 1 is rotatably connected to a water inlet cover 2 through a hinge. The water inlet cover 2 is closed at the extrusion end of the extrusion barrel 1 and circulates cooling water. The thermoplastic polyurethane elastomer can be cut with an existing cutter to form a water ring hot cutting effect. A water inlet 3 is provided on the water inlet cover 2. The water inlet 3 can conveniently convey water for cooling master batches to the inside of the water inlet cover 2. The bottom of the water inlet cover 2 is fixedly connected to a discharge bucket 4. The discharge bucket 4 can discharge thermoplastic polyurethane elastomer master batches and cooling water. The extrusion end of the extrusion barrel 1 is provided with an extrusion disk 5, which is used to form a thermoplastic polyurethane elastomer granulation belt.

[0022] The middle part of the extrusion disk 5 is rotatably connected to a limit rotating rod 6, and a pelletizing assembly 7 is detachably connected to the limit rotating rod 6. The pelletizing assembly 7 is used to pelletize the thermoplastic polyurethane elastomer extruded through the extrusion disk 5. A permanent magnet 8 is detachably connected to the pelletizing assembly 7. A permanent magnet 2 9 is connected to the water inlet cover 2 through a rotating shaft. The permanent magnet 2 9 and the permanent magnet 1 8 magnetically repel each other. In order to ensure that the permanent magnet 2 9 and the permanent magnet 1 8 can rotate synchronously under the action of magnetic repulsion, the permanent magnet 2 9 and the permanent magnet 1 8 in the present application can both adopt a multi-segment block structure and set the magnetic field in the form of a ring distribution to meet the driving effect of magnetic field repulsion. The shape settings of the permanent magnet 2 9 and the permanent magnet 1 8 in the accompanying drawings are merely exemplary. A rotating device 10 for driving the rotating shaft on the permanent magnet 2 9 is provided on the water inlet cover 2. The rotating device 10 can provide non-contact rotational power for the pelletizing assembly 7, and the rotating device 10 can adopt a rotating motor.

[0023] Matching door locks are provided on the water inlet hood 2 and the extrusion barrel 1 , and the door locks can be used to lock the rotational connection between the water inlet hood 2 and the extrusion barrel 1 .

[0024] An observation window 11 is provided on the water inlet cover 2, and the pelletizing state can be observed conveniently through the observation window 11. A sealing ring 12 is provided at one end of the water inlet cover 2, and the sealing ring 12 can provide sealing performance for the closure of the water inlet cover 2.

[0025] The pelletizing assembly 7 includes a knife seat 71 and a plurality of cutters 72 fixedly connected to the knife seat 71. A positioning sleeve 13 is fixedly passed through the knife seat 71. The knife seat 71 is plugged into the limiting rotating rod 6 through the positioning sleeve 13. An extrusion area is provided on the extrusion disk 5. The cutter 72 is tightly attached to the extrusion area of ​​the extrusion disk 5. In the present application, the limiting rotating rod 6 can be set in a "Φ" shape, so that the positioning sleeve 13 can achieve a linear sliding effect on the limiting rotating rod 6. When the cutter 72 contacts the extrusion area of ​​the extrusion disk 5, the limiting rotating rod 6 also reserves a certain length of sliding for the positioning sleeve 13, which can facilitate the subsequent forward compensation for the wear of the cutter 72.

[0026] When the water inlet cover 2 is closed at the extrusion end of the extrusion barrel 1, a gap is reserved between the permanent magnet 1 8 and the permanent magnet 2 9. By reserving a reasonable gap, the water inlet cover 2 can be conveniently opened and closed by rotating the hinge while ensuring the stability of the magnetic repulsion.

[0027] The end face of the permanent magnet 8 is fixedly connected with an insertion rod 14, and a rubber sleeve 15 is fixedly sleeved on the insertion rod 14. A socket is opened on the positioning sleeve 13, and the insertion rod 14 is tightly inserted in the socket through the rubber sleeve 15. The use of the insertion rod 14 and the rubber sleeve 15 can make the permanent magnet 8 inserted into the positioning sleeve 13 meet the pre-tightening requirement. While the permanent magnet 8 can be conveniently plugged in and out of the positioning sleeve 13, the stability of the position of the permanent magnet 8 can be improved.

[0028] It is worth noting that in the present application, the positioning sleeve 13 can preferably be made of metal material, and can achieve a magnetic attraction effect with the end of the permanent magnet 1 8 facing away from the permanent magnet 2 9, which can further stabilize the stability of the permanent magnet 1 8 set on the positioning sleeve 13.

[0029] Specifically, after the pelletizing assembly 7 and the permanent magnet 1 8 are both assembled at the position of the extrusion disk 5, the water inlet cover 2 can be closed until the permanent magnet 1 8 corresponds horizontally to the permanent magnet 2 9, and a magnetic field repulsion relationship can be formed between the permanent magnet 1 8 and the permanent magnet 2 9, so that the permanent magnet 1 8 can magnetically press the position of the knife seat 71 through the positioning sleeve 13, so that the cutter 72 is in contact and fit with the extrusion area of ​​the extrusion disk 5. When the cutter 72 is worn, the magnetic pressure effect of the permanent magnet 1 8 can adapt to push the positioning sleeve 13 forward on the limiting rotating rod 6, so that the wear compensation of the cutter 72 can be satisfied. Finally, the permanent magnet 2 9 can be driven to rotate by the rotating device 10, and the permanent magnet 2 9 can drive the cutter 72 to rotate through the permanent magnet 1 8.

[0030] It is worth mentioning that the knife seat 71 and the cutter 72 of the pelletizing assembly 7 can be integrated. At the same time, the knife seat 71 is based on the insertion assembly effect on the limiting rotating rod 6. At the same time, it is realized by the magnetic cooperation of the permanent magnet 1 8 and the permanent magnet 2 9. The limiting and rotation of the pelletizing are realized by magnetic pressure, so the convenience of disassembly of the pelletizing assembly 7 can be met.

Claims

1. A thermoplastic polyurethane elastomer water-cutting die head, comprising an extrusion barrel (1) for conveying molten thermoplastic polyurethane elastomer, characterized in that: The extrusion end of the extrusion barrel (1) is rotatably connected to a water inlet cover (2) via a hinge, a water inlet (3) is provided on the water inlet cover (2), a discharge hopper (4) is fixedly connected to the bottom of the water inlet cover (2), and an extrusion disc (5) is provided at the extrusion end of the extrusion barrel (1); The middle part of the extrusion disc (5) is rotatably connected to a limit rotating rod (6), and a pelletizing assembly (7) is detachably connected to the limit rotating rod (6). The pelletizing assembly (7) is used to pelletize the thermoplastic polyurethane elastomer extruded through the extrusion disc (5). The pelletizing assembly (7) is detachably connected to a permanent magnet 1 (8). The water inlet cover (2) is connected to a permanent magnet 2 (9) via a rotating shaft. The permanent magnet 2 (9) and the permanent magnet 1 (8) are magnetically repelled from each other. The water inlet cover (2) is provided with a rotating device (10) for driving the rotating shaft on the permanent magnet 2 (9) to rotate.

2. A thermoplastic polyurethane elastomer water cutting die head according to claim 1, characterized in that: The water inlet cover (2) and the extrusion barrel (1) are provided with matching door locks.

3. A thermoplastic polyurethane elastomer water cutting die head according to claim 1, characterized in that: An observation window (11) is provided on the water inlet cover (2), and a sealing ring (12) is provided at one end of the water inlet cover (2).

4. A thermoplastic polyurethane elastomer water cutting die head according to claim 1, characterized in that: The pelletizing assembly (7) comprises a knife seat (71) and a plurality of cutters (72) fixedly connected to the knife seat (71); a positioning sleeve (13) is fixedly passed through the knife seat (71); the knife seat (71) is plugged into the limit rotating rod (6) via the positioning sleeve (13); an extrusion area is provided on the extrusion disc (5); and the cutters (72) are closely attached to the extrusion area of ​​the extrusion disc (5).

5. A thermoplastic polyurethane elastomer water cutting die head according to claim 1, characterized in that: When the water inlet cover (2) is closed at the extrusion end of the extrusion barrel (1), a gap is reserved between the permanent magnet one (8) and the permanent magnet two (9).

6. A thermoplastic polyurethane elastomer water cutting die head according to claim 4, characterized in that: The end surface of the permanent magnet 1 (8) is fixedly connected to an insertion rod (14), a rubber sleeve (15) is fixedly sleeved on the insertion rod (14), a socket is provided on the positioning sleeve (13), and the insertion rod (14) is tightly inserted into the socket through the rubber sleeve (15).

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