Thermoplastic elastomer pelletizing device

Abstract

The utility model relates to a kind of thermoplastic elastomer cutting device, including frame and cutting knife, blanking opening is opened in the frame, one end of support plate is hingedly arranged in blanking opening and frame, support cylinder is rotatably arranged on the frame, and output shaft is hingedly connected with the free end of support plate below support plate, first traction roller is rotatably arranged on the frame, and motor transmission connection is arranged on the frame on the one side of support plate hinged end, first traction groove is opened on the circumference of first traction roller, knife seat is fixedly connected with cutting cylinder's output shaft arranged on the frame and arranged above blanking opening in the frame and can be longitudinally slidably arranged, and the cutting knife is arranged on the knife seat and is distributed along the first traction roller conveying direction interval. This thermoplastic elastomer cutting device can carry out the granulating operation of the specification uniformity of thermoplastic elastomer, and improve the smoothness when discharging.

Description

Technical Field

[0001] This utility model relates to the field of thermoplastic elastomer production technology, and in particular to a thermoplastic elastomer pelletizing device. Background Technology

[0002] After extrusion and cooling, thermoplastic elastomers are in strip form and need to be cut into granules by a pelletizing device to facilitate storage, transportation, and use. For example, the utility model patent "A Pelletizing Device for Thermoplastic Elastomers" (Publication No.: CN210500928U) discloses a pelletizing device that can uniformly pelletize thermoplastic elastomers. However, when the pelletizing device with the above structure is performing the feeding operation of thermoplastic elastomers, since the cut thermoplastic elastomer granules are located in the pelletizing platform, when the thermoplastic material behind pushes the thermoplastic elastomer granules located in the pelletizing platform out of the pelletizing platform through the pelletizing hole, the thermoplastic elastomer granules may deflect and get stuck in the pelletizing hole, affecting the feeding of the cut thermoplastic elastomer granules.

[0003] To address the aforementioned problems, this utility model provides improvements. Utility Model Content

[0004] This invention proposes a thermoplastic elastomer pelletizing device, which solves the above-mentioned problems existing in the use of the prior art.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A thermoplastic elastomer pelletizing device includes a frame and a cutter. The frame has a discharge port, and a support plate with one end hinged to the frame is disposed inside the discharge port. A support cylinder is rotatably disposed on the frame below the support plate, with its output shaft hinged to the free end of the support plate. A first traction roller is rotatably disposed on the frame, located on one side of the hinged end of the support plate and driven by a motor disposed on the frame. A first traction groove is formed on the circumferential surface of the first traction roller. A cutter holder is slidably disposed on the frame above the discharge port and fixedly connected to the output shaft of the cutting cylinder disposed on the frame. A plurality of cutters are spaced apart on the cutter holder along the conveying direction of the first traction roller.

[0007] Preferably, a second traction roller is rotatably mounted on the frame, located above the first traction roller, and a second traction groove aligned with the first traction groove is formed on the circumferential surface of the second traction roller.

[0008] Preferably, the support plate is provided with a plurality of guide plates parallel to the conveying direction of the first traction roller, and a guide channel is formed between two adjacent guide plates. The first traction groove and the second traction groove are provided with multiple grooves on the first traction roller and the second traction roller, and the plurality of first traction grooves and the second traction grooves are aligned with the plurality of guide channels. The guide plate is provided with cutting notches aligned with the plurality of cutters.

[0009] Preferably, the support plate has a plurality of cutting grooves that are aligned one-to-one with a plurality of cutting blades.

[0010] Preferably, the support plate is provided with a plurality of baffles located below the cutting groove. The baffles are slidably mounted on a plurality of inverted T-shaped support rods fixedly mounted on the support plate. A first spring is sleeved on the support rod and located between the baffle and the large end of the support rod, pressing against the baffle. A stop block formed on the baffle and matching the cutting groove is inserted into the cutting groove under the action of the first spring, so that the upper end surface of the stop block is flush with the upper end surface of the support plate.

[0011] Preferably, a pressure plate is provided between the two cutters. Several T-shaped sliding rods are fixedly provided on the pressure plate and pass through the cutter holder. A second spring is sleeved on the sliding rod and located between the cutter holder and the pressure plate, pressing against the pressure plate. The lower end face of the pressure plate protrudes from the lower end of the cutter under the action of the second spring.

[0012] Preferably, the pressure plate is provided with a scraper that abuts against the side of the cutter.

[0013] In summary, the beneficial effects of this utility model are as follows: the first traction roller conveys the strip-shaped thermoplastic elastomer onto a support plate that swings to a horizontal position; the cutting cylinder drives the cutter holder to move several cutters to cut the strip-shaped thermoplastic elastomer onto the support plate into granules; the support cylinder drives the support plate to swing to an inclined position, allowing the granules of thermoplastic elastomer onto the support plate to roll freely and achieve unloading. This process can be repeated to continuously granulate the thermoplastic elastomer. The simultaneous cutting by several cutters ensures that the granules of thermoplastic elastomer formed have relatively uniform specifications, which is convenient for subsequent use of the thermoplastic elastomer. Furthermore, the granules of thermoplastic elastomer are less prone to jamming during the unloading process after granulation, ensuring smooth unloading. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 This is a schematic diagram of the structure of the knife holder, cutter, and pressure plate in this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the support plate, guide plate and baffle in this utility model.

[0020] In the diagram: 1. Frame; 11. Material discharge port; 2. Cutter; 3. Support plate; 31. Guide plate; 32. Guide channel; 33. Cutting notch; 34. Cutting groove; 35. Baffle; 351. Stop block; 36. Support rod; 37. First spring; 4. Support cylinder; 5. First traction roller; 51. First traction groove; 6. Knife holder; 7. Cutting cylinder; 8. Second traction roller; 81. Second traction groove; 9. Pressure plate; 91. Sliding rod; 92. Second spring; 93. Scraper. Detailed Implementation

[0021] The following will refer to the appendix in the embodiments of this utility model. Figure 1-5 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] As shown in the figure, a thermoplastic elastomer pelletizing device includes a frame 1 and a cutter 2. The frame 1 has a discharge port 11, and a support plate 3 with one end hinged to the frame 1 is disposed inside the discharge port 11. A support cylinder 4 is rotatably disposed on the frame 1, located below the support plate 3 and with its output shaft hinged to the free end of the support plate 3. A first traction roller 5 is rotatably disposed on the frame 1, located on one side of the hinged end of the support plate 3, and is connected to a motor (located inside the frame 1, not shown in the figure) disposed on the frame 1 via a synchronous belt and a synchronous pulley. A first traction groove 51 is provided on the circumferential surface of the first traction roller 5. A cutter holder 6 is slidably disposed on the frame 1, located above the discharge port 11 and fixedly connected to the output shaft of a cutting cylinder 7 disposed on the frame 1. A plurality of cutters 2 are distributed at intervals along the conveying direction of the first traction roller 5 on the cutter holder 6.

[0023] In the above structure, when performing pelletizing of the thermoplastic elastomer, the support cylinder 4 drives the support plate 3 to swing to a horizontal position. The cooled and shaped strip of thermoplastic elastomer passes through the first traction groove 51. The motor drives the first traction roller 5 to rotate. The first traction roller 5, through friction with the strip of thermoplastic elastomer, drives the strip of thermoplastic elastomer towards the support plate 3, placing it on the support plate 3 below several cutters 2. The cutting cylinder 7 drives the cutter holder 6, causing several cutters 2 to move towards the support plate 3, cutting the strip of thermoplastic elastomer into pellets, thus achieving pelletizing of the thermoplastic elastomer. As the cutters 2 complete the pelletizing operation and return to their original position with the cutter holder 6, the support cylinder 4 drives the free end of the support plate 3 to swing downward, causing the support plate 3 to gradually tilt. The granular thermoplastic elastomer placed on the support plate 3 rolls off the support plate 3 as the support plate 3 tilts, thus realizing the feeding of the thermoplastic elastomer. At the same time as the support plate 3 returns to the horizontal position after feeding, the first traction roller 5 conveys the strip-shaped thermoplastic elastomer forward a certain length and places it on the returned support plate 3 for the next pelletizing operation. This pelletizing operation of thermoplastic elastomer is repeated continuously. In the above pelletizing operation of thermoplastic elastomer, the simultaneous cutting by several cutters 2 ensures that the pelletized thermoplastic elastomer has a relatively uniform specification standard, which is convenient for the subsequent use of thermoplastic elastomer. In addition, the pelletized thermoplastic elastomer is not prone to jamming during the feeding process after pelletizing, ensuring smooth feeding.

[0024] Furthermore, based on the above structure, a second traction roller 8 is rotatably mounted on the frame 1, located above the first traction roller 5. The second traction roller 8 has a second traction groove 81 on its circumferential surface that is aligned with the first traction groove 51. The strip-shaped thermoplastic elastomer passes between the first traction roller 5 and the second traction roller 8. The second traction roller 8 presses the strip-shaped thermoplastic elastomer tightly within the first traction groove 51 and the second traction groove 81, maintaining close contact with the first traction roller 5, thereby ensuring the stability of the first traction roller 5 when conveying the strip-shaped thermoplastic elastomer.

[0025] Furthermore, based on the above structure, several guide plates 31 parallel to the conveying direction of the first traction roller 5 are erected on the support plate 3. A guide channel 32 is formed between two adjacent guide plates 31. Multiple first traction grooves 51 and second traction grooves 81 are respectively provided on the first traction roller 5 and the second traction roller 8. Several first traction grooves 51 and second traction grooves 81 are aligned with several guide channels 32. Cutting notches 33 aligned with several cutters 2 are provided on the guide plates 31. The strip-shaped thermoplastic elastomer conveyed by the guide roller 5 passes through the guide channel 32 and is placed on the support plate 3. When the cutter 2 cuts the strip-shaped thermoplastic elastomer, the guide plate 31 limits the strip-shaped thermoplastic elastomer to prevent it from shifting during cutting, so that the granulated thermoplastic elastomer formed by cutting maintains a uniform specification. The cooperation of multiple guide channels 32 with multiple first traction grooves 51 and second traction grooves 81 can improve the efficiency of pelletizing multiple strip-shaped thermoplastic elastomers by performing pelletizing operations.

[0026] In addition, based on the above structure, the support plate 3 is provided with a plurality of cutting grooves 34 that are aligned one-to-one with a plurality of cutting blades 2. When the cutting blades 2 cut strips of thermoplastic elastomer, the cutting grooves 34 enable the cutting blades 2 to completely cut the strips of thermoplastic elastomer without making rigid contact with the support plate 3, thereby ensuring the stability of the pellets and reducing the wear of the cutting blades 2.

[0027] Furthermore, based on the above structure, the support plate 3 is provided with several baffles 35 located below the cutting groove 34. The baffles 35 are slidably mounted on several inverted T-shaped support rods 36 fixedly mounted on the support plate 3. A first spring 37 is fitted onto each support rod 36, located between the baffle 35 and the larger end of the support rod 36, and abuts against the baffle 35. A stop block 351 formed on the baffle 35, matching the cutting groove 34, is inserted into the cutting groove 34 under the action of the first spring 37, making the upper surface of the stop block 351 flush with the upper surface of the support plate 3. The stop block 351 fills the groove. The cutting groove 34 is inserted into the support plate 3 to form a flat plane on the upper surface of the support plate 3. This prevents the strip thermoplastic elastomer from being stuck when the first traction roller 5 conveys the strip thermoplastic elastomer to the support plate 3 due to the influence of the cutting groove 34, which would affect the feeding and conveying of the strip thermoplastic elastomer. When the cutter 2 cuts the strip thermoplastic elastomer, the cutter 2 contacts the stop block 351 and pushes the stop block 351, thereby driving the baffle 35 to slide downward on the support rod 36. This ensures that the cutter 2 extends into the cutting groove 34 and completely cuts the strip thermoplastic elastomer. The sliding of the stop block 351 also avoids rigid contact between the cutter 2 and the stop block 351, reducing the wear of the cutter 2.

[0028] Furthermore, based on the above structure, a pressure plate 9 is provided between the two cutters 2. Several T-shaped sliding rods 91 are fixedly installed on the pressure plate 9, passing through the cutter holder 6. A second spring 92 is sleeved on each sliding rod 91, located between the cutter holder 6 and the pressure plate 9, and abuts against the pressure plate 9. The lower end of the pressure plate 9 protrudes beyond the lower end of the cutter 2 under the action of the second spring 92. While the cutter holder 6 drives the cutters 2 to perform pelletizing operations on the strip-shaped thermoplastic elastomer placed on the support plate 3, the pressure plate 9 moves with the cutter holder 6 and contacts the strip-shaped thermoplastic elastomer before the cutters 2, thus pelletizing the strip-shaped thermoplastic elastomer. The thermoplastic elastomer is pressed against the support plate 3 to prevent the strip-shaped thermoplastic elastomer from shifting during the pelletizing process, thus ensuring the consistency of the granular thermoplastic elastomer formed by cutting. During the process of the cutter 2 cutting into the strip-shaped thermoplastic elastomer, the sliding rod 91 slides relative to the cutter holder 6, so that the pressure plate 9 always abuts against the strip-shaped thermoplastic elastomer. During the process of the cutter 2 completing the cutting and moving upward and resetting with the cutter holder 6, the pressure plate 9 also always abuts against the granular thermoplastic elastomer formed after cutting, preventing the granular thermoplastic elastomer from adhering to the side of the cutter 2 and being pulled away from the support plate 3, thus affecting the subsequent feeding.

[0029] In addition, based on the above structure, the side end of the pressure plate 9 is provided with a scraper 93 that abuts against the side of the cutter 2. When the pressure plate 9 and the cutter holder 6 are relatively displaced, the scraper 93 scrapes on the side of the cutter 2 to remove impurities adhering to the side of the cutter 2, keeping the side of the cutter 2 clean and ensuring the smoothness of the cutter 2 when cutting strips of thermoplastic elastomer. This reduces the frequency of cleaning and maintenance of the cutter 2, saves labor, and improves efficiency.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A thermoplastic elastomer dicing apparatus comprising a frame (1) and a dicing blade (2), characterized in that: The frame (1) is provided with a material discharge port (11), and a support plate (3) with one end hinged to the frame (1) is provided in the material discharge port (11). A support cylinder (4) is rotatably provided on the frame (1) below the support plate (3) and the output shaft is hinged to the free end of the support plate (3). A first traction roller (5) is rotatably provided on the frame (1) on one side of the hinge end of the support plate (3) and is connected to the motor on the frame (1) via transmission. A first traction groove (51) is provided on the circumferential surface of the first traction roller (5). A knife holder (6) is slidably provided on the frame (1) above the material discharge port (11) and fixedly connected to the output shaft of the cutting cylinder (7) on the frame (1). Several cutters (2) are spaced apart on the knife holder (6) along the conveying direction of the first traction roller (5).

2. The thermoplastic elastomer pelletizing apparatus according to claim 1, characterized by: The frame (1) is rotatably provided with a second traction roller (8) located above the first traction roller (5), and the second traction roller (8) has a second traction groove (81) aligned with the first traction groove (51) on its circumferential surface.

3. The thermoplastic elastomer dicing apparatus of claim 2, wherein: The support plate (3) is provided with a number of guide plates (31) that are parallel to the conveying direction of the first traction roller (5). A guide channel (32) is formed between two adjacent guide plates (31). The first traction groove (51) and the second traction groove (81) are provided with multiple grooves on the first traction roller (5) and the second traction roller (8), respectively. The first traction groove (51) and the second traction groove (81) are aligned with the guide channel (32). The guide plate (31) is provided with a cutting notch (33) that is aligned with the cutter (2).

4. The thermoplastic elastomer dicing apparatus of claim 3, wherein: The support plate (3) has several cutting grooves (34) that are aligned one-to-one with several cutting blades (2).

5. The thermoplastic elastomer dicing apparatus of claim 4, wherein: The support plate (3) is provided with a plurality of baffles (35) located below the cutting groove (34). The baffles (35) are slidably inserted through a plurality of inverted T-shaped support rods (36) fixedly provided on the support plate (3). A first spring (37) is sleeved on the support rod (36) and located between the baffle (35) and the large end of the support rod (36) and abuts against the baffle (35). A stop block (351) formed on the baffle (35) and matching the cutting groove (34) is inserted into the cutting groove (34) under the action of the first spring (37), so that the upper end surface of the stop block (351) is flush with the upper end surface of the support plate (3).

6. The thermoplastic elastomer dicing apparatus of claim 5, wherein: A pressure plate (9) is provided between the two cutters (2). Several sliding rods (91) in the shape of T-shaped rods are fixedly provided on the pressure plate (9) and pass through the cutter holder (6). A second spring (92) is sleeved on the sliding rod (91) and is located between the cutter holder (6) and the pressure plate (9) and abuts against the pressure plate (9). The lower end face of the pressure plate (9) protrudes from the lower end of the cutter (2) under the action of the second spring (92).

7. The thermoplastic elastomer dicing apparatus of claim 6, wherein: The pressure plate (9) is provided with a scraper (93) on its side end that abuts against the side of the cutter (2).

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