Kneading block for screw of high polymer material granulator

Abstract

The utility model discloses a kneading block for a screw of a high polymer material granulator. The kneading block comprises a core shaft, the kneading modules are arranged on the core shaft in a staggered and sleeved mode at a certain angle, so that working faces are formed at the two ends of each kneading module, a ternary boride metal ceramic alloy layer with the thickness being 2-5 mm is clad on each working face, and the ternary boride metal ceramic alloy layer is parallel to the axial edge of the core shaft and is arranged in an arc shape. The ternary boride metal ceramic alloy layer is cladded on the working surface of the kneading block, so that the corrosion resistance, wear resistance and impact resistance of the working surface of the kneading block can be effectively improved; and meanwhile, the ternary boride metal ceramic alloy layer is arranged in a manner of being parallel to the axial edge of the mandrel in an arc manner, so that the stripping probability of the ternary boride metal ceramic alloy layer can be reduced, the service life of the kneading block is effectively prolonged, and the product quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of polymer material processing, in particular to a kneading block used for a screw rod of a polymer material granulator. Background Art

[0002] The screw of a polymer granulator rotates at high speed, driving the kneading blocks on the screw to extrude and shear the material. This process involves constant friction between the kneading blocks and the material. Furthermore, during the polymer material processing process, the kneading blocks are exposed to high temperatures and corrosive conditions for extended periods. This can cause wear and corrosion on the working surfaces of the kneading blocks, impacting the granulator's normal operation and product quality. Conventional technologies employ spray coatings to protect the kneading blocks, but this approach suffers from weak coating adhesion, easy shedding, and unstable performance.

[0003] In view of this, it is necessary to design a kneading block for the screw of a polymer material granulator to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a kneading block for a screw of a polymer material granulator which is corrosion-resistant and wear-resistant, has high bonding strength, is not easy to fall off, has good impact resistance and long service life.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A kneading block for a screw of a polymer material granulator, comprising:

[0007] Mandrel;

[0008] Kneading modules, several kneading modules are staggered and sleeved on the core shaft at a certain angle, so that working surfaces are formed at both ends of the kneading modules, and a layer of ternary boride metal ceramic alloy with a thickness of 2-5 mm is clad on the working surface, and the ternary boride metal ceramic alloy layer is arranged in an arc shape parallel to the axial edge of the core shaft.

[0009] As a further improvement of the present invention, the ternary boride metal ceramic alloy layer is a molybdenum-iron-chromium-boron ceramic alloy layer.

[0010] As a further improvement of the present invention, the kneading module is in a shuttle-shaped structure, and the working surfaces are located on the top and bottom surfaces of the shuttle-shaped structure.

[0011] As a further improvement of the present invention, a plurality of kneading modules are staggered and sleeved on the core shaft at an angle of 30-90 degrees.

[0012] As a further improvement of the present invention, the kneading module is made of alloy steel.

[0013] As a further improvement of the present invention, an axial hole for connecting a screw is provided at the center of the core shaft.

[0014] As a further improvement of the present invention, a spline groove is provided on the wall of the shaft hole.

[0015] The beneficial effects of the utility model are:

[0016] 1. The present invention utilizes a ternary boride metal-ceramic alloy layer to clad the working surface of the kneading block, thereby improving the corrosion resistance, wear resistance, and impact resistance of the working surface of the kneading block. Furthermore, by arranging the ternary boride metal-ceramic alloy layer in an arc shape parallel to the axial edge of the core shaft, the probability of peeling of the ternary boride metal-ceramic alloy layer can be reduced, thereby effectively extending the service life of the kneading block and ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the kneading block of the screw of the polymer material granulator of the present invention.

[0018] Figure 2 This is the aa sectional view.

[0019] Figure 3 This is an enlarged view of point A.

[0020] Figure 4 This is a schematic diagram of the ternary boride metal-ceramic alloy layer when the edge parallel to the axial direction of the core shaft is not rounded.

[0021] Reference numerals

[0022] 10. Mandrel; 11. Shaft hole; 12. Spline groove; 20. Kneading module; 21. Working surface; 30. Ternary boride metal ceramic alloy layer. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] It should also be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0025] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0026] See also Figure 1-Figure 2 As shown, the utility model provides a kneading block for a screw of a polymer material granulator, comprising:

[0027] Mandrel 10;

[0028] The kneading module 20 is staggered and sleeved on the core shaft 10 at a certain angle, so that a working surface 21 is formed at both ends of the kneading module 20, and a layer of ternary boride metal ceramic alloy layer 30 with a thickness of 2-5 mm is clad on the working surface 21, and the ternary boride metal ceramic alloy layer 30 is arranged in an arc parallel to the axial edge of the core shaft 10.

[0029] Through the cladding process, the ternary boride cermet alloy layer 30 can be stably attached to the working surface 21 , thereby utilizing the ternary boride cermet alloy layer 30 to improve the corrosion resistance, wear resistance and impact resistance of the working surface 21 .

[0030] For example, Figure 4 As shown, when the edge of the ternary boride metal-ceramic alloy layer 30 parallel to the axial direction of the core shaft 10 is not set as an arc and is sharp, in the working state, the kneading block rotates at a high speed, and the working surface 21 will squeeze and cut the polymer material. Under the impact, the ternary boride metal-ceramic alloy layer 30 at the edge parallel to the axial direction of the core shaft 10 is easy to peel off. However, the utility model sets the edge of the ternary boride metal-ceramic alloy layer 30 parallel to the axial direction of the core shaft 10 as an arc ( Figure 3 ), which can reduce the stress on the ternary boride cermet alloy layer 30 in this part, and avoid the peeling of the ternary boride cermet alloy layer 30 in this part due to multiple collisions between the working surface 21 and the material during rotation, thereby reducing the probability of peeling of the ternary boride cermet alloy layer 30, increasing the service life of the kneading block and ensuring product quality.

[0031] Specifically, the ternary boride metal ceramic alloy layer 30 is a molybdenum-iron-chromium-boron ceramic alloy layer.

[0032] Specifically, the kneading modules 20 are shuttle-shaped, with working surfaces 21 located at the top and bottom surfaces of the shuttle-shaped structure. Several kneading modules 20 are staggered and sleeved on the mandrel 10 at angles of 30-90 degrees. For example, the kneading modules 20 are staggered and sleeved on the mandrel 10 at angles of 90 degrees.

[0033] Specifically, the kneading module 20 is made of alloy steel.

[0034] Specifically, the center of the core shaft 10 is provided with an axial hole 11 for connecting with a screw, and a spline groove 12 is provided on the wall of the axial hole 11, so that the kneading module 20 can be set on the screw by passing the screw through the axial hole 11.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A kneading block for a screw of a polymer material granulator, characterized in that: include: Mandrel; Kneading modules, several kneading modules are staggered and sleeved on the core shaft at a certain angle, so that working surfaces are formed at both ends of the kneading modules, and a layer of ternary boride metal ceramic alloy with a thickness of 2-5 mm is clad on the working surface, and the ternary boride metal ceramic alloy layer is arranged in an arc shape parallel to the axial edge of the core shaft.

2. The kneading block for the screw of a polymer material granulator according to claim 1, characterized in that: The ternary boride metal ceramic alloy layer is a molybdenum-iron-chromium-boron ceramic alloy layer.

3. The kneading block for the screw of a polymer material granulator according to claim 1, characterized in that: The kneading module is in a shuttle-shaped structure, and the working surfaces are located on the top and bottom surfaces of the shuttle-shaped structure.

4. The kneading block for the screw of a polymer material granulator according to claim 1, characterized in that: Several kneading modules are staggered and sleeved on the core shaft at an angle of 30-90 degrees.

5. The kneading block for the screw of a polymer material granulator according to claim 1, characterized in that: The kneading module is made of alloy steel.

6. The kneading block for the screw of a polymer material granulator according to claim 1, characterized in that: The center of the core shaft is provided with an axial hole for connecting a screw rod.

7. The kneading block for the screw of a polymer material granulator according to claim 6, characterized in that: A spline groove is provided on the wall of the shaft hole.

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