Knife rest of granulator

Abstract

The utility model relates to the technical field of pelletizing equipment, in particular to a cutter rest of a pelletizer, which comprises a cutter head and a cutter bar, the cutter disc comprises a disc body, a frame body fixedly arranged on the outer circle of the disc body and a compensation assembly embedded in the center position in the disc body, the compensation assembly comprises a ball rotationally connected with the disc body, and the ball is detachably connected with the end of the cutter bar; the cutter bar comprises a first bar body, a second bar body, a compression spring and a fastening assembly used for locking the first bar body and the second bar body, a first groove is formed in the first bar body, the second bar body is inserted into the first groove, a second groove is formed in the second bar body, one end of the compression spring is fixed into the second groove, and the other end of the compression spring is fixed into the fastening assembly. The other end of the pressure spring and the second rod body are inserted into the first groove, and the pressure spring abuts against the inner wall of the first rod body; according to the scheme, the technical problem that the maintenance cost is high due to the fact that a traditional integral cutter head is used can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pelletizing equipment, in particular to a cutter holder of a pelletizer. Background Art

[0002] The cutter holder of a pelletizer is a key component used in the plastic processing industry to cut linear or strip-shaped plastics into plastic particles of the required size. When designing the cutter holder of a pelletizer, it is necessary to ensure its durability and maintenance cost. For the existing cutter holders of pelletizers such as Figure 1 and Figure 2 as shown, including an integral cutter disc 1, on the frame 12 of the cutter disc 1, blades for cutting plastic particles are fixedly connected by screws. After being used for a period of time, multiple blades installed on the cutter disc 1 are prone to wear. At this time, it is necessary to stop the machine and replace them with new blades. Otherwise, using blades with a certain degree of wear to cut plastic particles is likely to result in unevenly cut particles, affecting the quality of the pellets. However, the procurement cost of the blades is relatively high. If the blades are replaced frequently, the maintenance cost of the cutter holder of the pelletizer is difficult to control. Summary of the Utility Model

[0003] The utility model provides a cutter holder of a pelletizer, which can solve the technical problem of high maintenance cost caused by using a traditional integral cutter disc.

[0004] The present application provides the following technical solutions:

[0005] A cutter holder of a pelletizer, comprising a cutter disc and a cutter bar; the cutter disc includes a disc body, a frame fixedly arranged on the outer circle of the disc body, and a compensation component embedded in the central position inside the disc body. The compensation component includes a sphere rotatably connected to the disc body, and the sphere is detachably connected to the end of the cutter bar; the cutter bar includes a first rod body, a second rod body, a compression spring, and a locking component for locking the first rod body and the second rod body. A first groove is formed in the first rod body, the second rod body is inserted into the first groove, a second groove is formed in the second rod body, one end of the compression spring is fixed in the second groove, the other end of the compression spring and the second rod body are inserted into the first groove and the compression spring abuts against the inner wall of the first rod body.

[0006] Beneficial Effects:

[0007] 1. Improve the durability of the blade: Through the insertion and cooperation of the first rod body and the second rod body, the overall length of the cutter bar can be quickly adjusted to compensate for the axial wear of the blade. The disc body and the sphere rotatably connected to the disc body are used to radially adjust the cutting direction of the blade to compensate for the radial deflection of the blade. There is no need to frequently replace new blades, so as to extend the service life of the blade, which is beneficial to controlling the production cost, thereby bringing about an increase in economic benefits and production efficiency.

[0008] 2. Provide stable pressure support: By setting the compression spring to contact the inner wall of the first rod body, it can ensure that the compression spring always generates a certain pre-tightening force on the inside of the tool holder during compression or extension, which is beneficial to the connection stability of the overall tool holder.

[0009] Furthermore, as an improvement, the compensation assembly further includes a mounting seat and a lid for rotatably mounting the sphere, and a ball pin for restricting the rotation range of the sphere. The mounting seat and the lid are both fixedly connected to the inner wall of the disk body, forming a rotation gap therebetween. One end of the ball pin is fixedly connected to the sphere, and the other end of the ball pin is inserted into the rotation gap.

[0010] Beneficial effects: The mounting seat and the lid are fixedly connected to the inner wall of the disk body, and the rotation gap formed therebetween allows the sphere to freely rotate inside it, thus achieving multi-directional movement. The ball pin can effectively restrict the rotation range of the sphere, avoiding damage or reduced stability caused by excessive rotation.

[0011] Furthermore, as an improvement, a connection head with an external thread is fixedly provided at the end of the first rod body close to the tool disk side, and a threaded hole penetrating the sphere is opened at the center of the sphere. The connection head and the threaded hole are detachably connected in a threaded connection manner.

[0012] Beneficial effects: Through the threaded connection method, the first rod body and the sphere can be quickly and conveniently connected or disassembled, greatly simplifying the assembly and maintenance process. At the same time, combined with the pre-tightening force applied by the compression spring, the connection stability between the first rod body and the sphere is enhanced.

[0013] Furthermore, as an improvement, the second rod body includes a fixedly connected first outer circular section and a second outer circular section, and a step is formed at the connection between the first outer circular section and the second outer circular section. The first outer circular section has a clearance fit with the first groove.

[0014] Beneficial effects: Through the clearance fit between the first outer circular section and the first groove, the first rod body and the second rod body can be smoothly assembled together. The presence of the step can provide a support point for the first outer circular section, helping to improve the stability of the second rod body when bearing loads and reducing the risk of bending or twisting.

[0015] Furthermore, as an improvement, a contact head is fixedly provided on the compression spring and abuts against the inner wall of the first rod body.

[0016] Beneficial effects: The fixedly provided contact head can ensure that the compression spring does not undergo serious deformation, avoiding functional failure problems caused by the displacement or deformation of the compression spring. At the same time, the contact head is usually made of wear-resistant material, which can reduce the direct contact between the compression spring and the inner wall of the first rod body, thereby reducing the wear of the end face of the compression spring and extending the service life of the compression spring.

[0017] Further, as an improvement, a pressing plate for fixing the blade is installed on the end face of the disc body on the side far from the tool bar, and a screw is installed between the pressing plate and the disc body in a threaded manner.

[0018] Beneficial effects: By setting the pressing plate to cooperate with the disc body to clamp the blade, the reliability of blade fixation is improved, preventing the blade from loosening or falling off during high-speed rotation or cutting. At the same time, due to the detachable nature of the screw connection, the process of replacing the blade becomes simple and fast. Description of the Drawings

[0019] Figure 1 is the front view of the integral tool disc in the prior art;

[0020] Figure 2 is Figure 1 the A-A sectional view of

[0021] Figure 3 is the front view of the first embodiment of the cutter holder of the present utility model for a pelletizer;

[0022] Figure 4 is Figure 3 the right view of Figure 1 where the tool disc part is the B-B sectional view in

[0023] Figure 5 is Figure 4 the structural schematic diagram of the first rod body in

[0024] Figure 6 is Figure 4 the sectional view of the second rod body in

[0025] Figure 7 is Figure 6 the C-C sectional view of Specific Embodiments

[0026] The following is further detailed through specific embodiments: tool disc 1, disc body 11, frame body 12, pressing plate 13, fixing screw 14, mounting seat 15, lid 16, sphere 17, first fixing hole 171, ball pin 18, rotation gap 19, tool bar 2, first rod body 21, connecting head 211, first groove 212, rib 213, second fixing hole 214, second rod body 22, first outer circular section 221, keyway 2211, second groove 2212, guide groove 2213, second outer circular section 222, compression spring 223, abutting head 224.

[0027] The reference signs in the drawings of the specification include:

[0028] Embodiment 1

[0029] As Figures 3 - 7As shown in the figure, a pelletizer tool holder includes a tool disc 1 and a tool bar 2 that can be assembled for use. Among them, the tool disc 1 includes a disc body 11 with a circular structure, a frame body 12 for fixedly installing blades, and a compensation component embedded in the central position inside the disc body 11. The tool bar 2 includes a first rod body 21 and a second rod body 22 that can be assembled for use.

[0030] A total of three frame bodies 12 are provided and are evenly distributed around the tool disc 1. The frame body 12 is integrally formed with the outer circle of the tool disc 1. A pressing plate 13 is fixedly installed on the end face of the frame body 12 away from the tool bar 2. A fixing screw 14 is threadedly connected between the pressing plate 13 and the disc body 11, and the blade is clamped and fixed between the pressing plate 13 and the disc body 11.

[0031] The disc body 11 is a hollow annular structure. The compensation component includes a mounting seat 15 and a cover 16 that are fixed in the cavity inside the disc body 11 by screws, a sphere 17 rotatably connected to the mounting seat 15 and the cover 16, and a ball pin 18 for restricting the rotation range of the sphere 17. The mounting seat 15 and the cover 16 are respectively located on both sides of the ball pin 18 as Figure 4 shown. A rotation gap 19 is formed between the mounting seat 15 and the cover 16. One end of the ball pin 18 is fixedly connected to the sphere 17, and the other end of the ball pin 18 is inserted into the rotation gap 19. The rotation range of the sphere 17 is the swinging amplitude of the ball pin 18 in the rotation gap 19. A threaded hole penetrating the sphere 17 is axially opened at the center of the sphere 17 as the first fixing hole 171.

[0032] Both the first rod body 21 and the second rod body 22 are long rod-shaped structures. A connecting head 211 with an external thread is fixedly provided at the end of the first rod body 21 close to the tool disc 1, so that the connecting head 211 and the first fixing hole 171 can be detachably connected by a threaded connection. A first groove 212 facing the second rod body 22 is opened in the first rod body 21 as Figure 5 shown. A strip-shaped rib 213 is fixedly provided on the inner wall of the first groove 212. The function of the rib 213 is to provide guidance for the assembly of the second rod body 22. A threaded hole is installed on the side wall of the first rod body 21 as the second fixing hole 214 for fixing the second rod body 22. The second fixing hole 214 penetrates into the first groove 212. A set screw is threadedly installed in the second fixing hole 214 and abuts against and fixes the surface of the assembled second rod body 22.

[0033] As Figure 6 and Figure 7As shown, the second rod body 22 includes a first outer circular section 221 and a second outer circular section 222 that are fixedly connected. The diameter of the second outer circular section 222 is greater than that of the first outer circular section 221, such that a step is formed at the connection between the first outer circular section 221 and the second outer circular section 222. The first outer circular section 221 is in clearance fit with the first groove 212, enabling the second rod body 22 to slide within the first groove 212. A keyway 2211 for fixing the second rod body 22 within the first groove 212 is provided on the first outer circular section 221 and is in abutting fit with the second fixing hole 214 on the first rod body 21. A guiding groove 2213 that is in sliding fit with the rib 213 within the first rod body 21 is provided on the second rod body 22. A second groove 2212 is provided on the side of the second rod body 22 facing the first rod body 21. A compression spring 223 is fixedly installed within the second groove 2212. One end of the compression spring 223 is fixed within the second groove 2212, and the other end of the compression spring 223 is fixedly sleeved with a T-shaped abutting head 224. When the first rod body 21 and the second rod body 22 are assembled together, the abutting head 224 abuts against the inner wall of the first rod body 21 within the first groove 212 and further compresses the compression spring 223. By controlling the degree of compression of the compression spring 223, the pre-tightening force between the tool bar 2 and the tool disc 1 can be controlled.

[0034] The specific application process is as follows:

[0035] Before use, first assemble the tool bar 2. Specifically, align the abutment of the second rod body 22 with the first groove 212 of the first rod body 21 and insert it. It is necessary to ensure that the guiding groove 2213 on the first outer circular section 221 is aligned with the rib 213 within the first groove 212 with which it slides, until the abutting head 224 abuts against the inner wall of the first rod body 21 within the first groove 212 and further compresses the compression spring 223. Note that at this time, the keyway 2211 on the second rod body 22 can be observed through the second fixing hole 214 on the first rod body 21. Then, screw a set screw into the second fixing hole 214 so that the end of the set screw abuts against the keyway 2211 to achieve the effect of fixing the second rod body 22. Then, assemble the tool bar 2 onto the tool disc 1. Specifically, screw the connecting head 211 on the first rod body 21 into the first fixing hole 171, and the connecting head 211 and the first fixing hole 171 are fixed in a threaded connection manner. Finally, use screws on the frame 12 of the tool disc 1 to clamp and fix the blade between the pressing plate 13 and the disc body 11, and assemble the entire tool holder onto the granulator for use.

[0036] After the pelletizer has been running for some time, the blades show a certain degree of wear. Stop the machine and remove the tool holder from the pelletizer. Then, loosen the set screw and pull the first rod body 21 away from the second rod body 22 to compensate for the wear of the blades. Then, tighten the set screw again. At the same time, shake the tool bar 2 to rotate the sphere 17 so that the cutting angle of the blades can be compensated and adjusted, thereby ensuring that when the tool holder is reassembled onto the pelletizer, the technical problem of uneven plastic pellets cut by it can be solved.

[0037] The above are only the embodiments of the present invention. The present invention is not limited to the fields involved in this embodiment. Common knowledge such as the specific structures and characteristics known in the solution is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A pelletizer tool holder, characterized in that: It includes a cutter head and a tool shank; the cutter head includes a disc body, a frame body fixed on the outer circumference of the disc body, and a compensation component embedded at the central position inside the disc body. The compensation component includes a sphere rotatably connected to the disc body, and the sphere is detachably connected to the end of the tool shank; the tool shank includes a first rod body, a second rod body, a compression spring, and a set screw component for locking the first rod body and the second rod body. A first groove is formed in the first rod body, the second rod body is inserted into the first groove, a second groove is formed in the second rod body, one end of the compression spring is fixed in the second groove, the other end of the compression spring and the second rod body are inserted into the first groove and the compression spring abuts against the inner wall of the first rod body.

2. The pelletizer tool holder according to claim 1, characterized in that: The compensation component further includes a mounting seat and a lid for rotatably mounting the sphere, and a ball pin for restricting the rotation range of the sphere. Both the mounting seat and the lid are fixedly connected to the inner wall of the disc body, a rotation gap is formed between the mounting seat and the lid, one end of the ball pin is fixedly connected to the sphere, and the other end of the ball pin is inserted into the rotation gap.

3. The pelletizer tool holder according to claim 2, wherein: A connector with an external thread is fixedly arranged at the end of the first rod body close to the cutter head. A threaded hole penetrating through the sphere is formed at the center of the sphere, and the connector and the threaded hole are detachably connected by means of threaded connection.

4. The pelletizer tool carrier according to claim 3, characterized in that: The second rod body includes a first outer circular section and a second outer circular section fixedly connected. A step is formed at the connection between the first outer circular section and the second outer circular section, and the first outer circular section is in clearance fit with the first groove.

5. A pelletizer tool carrier according to claim 4, characterized in that: An abutting head is fixedly arranged on the compression spring and abuts against the inner wall of the first rod body.

6. The pelletizer tool carrier according to claim 5, characterized in that: A pressing plate for fixing the blade is mounted on the end face of the disc body away from the tool shank, and a screw is threadedly installed between the pressing plate and the disc body.

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