Extrusion mechanism for tire tread

Abstract

The utility model discloses a tire tread extrusion mechanism which comprises a mouth-shaped box, a mouth-shaped plate and a pre-mouth-shaped plate are arranged in the mouth-shaped box side by side in a front-back mode, and a first wing rubber groove allowing wing rubber to flow through, a first tire rubber groove allowing tread rubber to flow through and a first bottom rubber groove allowing bottom rubber to flow through are formed in the pre-mouth-shaped plate in a front-back penetrating mode. The front end of the first wing glue groove is not narrower than the rear end; and a second wing rubber groove for the wing rubber to flow through, a second tire rubber groove for the tread rubber to flow through, a second bottom rubber groove for the bottom rubber to flow through and a compounding groove for compounding the rubber material are formed in the mouth-shaped plate. The width of the front end of the first wing rubber groove is larger than that of the rear end of the first wing rubber groove, so that the first wing rubber groove can adapt to flowing of wing rubber of treads with different widths, namely, the number of the preformed mouth-shaped plates can be effectively reduced, the replacement frequency of the preformed mouth-shaped plates is reduced, production continuity and production efficiency are guaranteed, and quality control is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of tire tread extrusion devices, and particularly relates to an extrusion mechanism for tire treads. Background Art

[0002] With the rapid development of tires and the increasing competition pressure in the industry, more and more enterprises are constantly pursuing the continuous improvement of production efficiency and product quality. The extrusion process has always been one of the processes that affect the production efficiency and quality of tires in the tire industry. Currently, the extrusion mechanism of tire treads usually uses a pre-orifice plate in combination with an orifice plate for production operations. Since there are different specifications of treads, it is necessary to frequently replace the pre-orifice plate during the production process to ensure the quality and efficiency during the tread extrusion process. When using the above method of replacing the pre-orifice plate, not only the production continuity is affected and the production efficiency is reduced, but also the difficulty of quality control during the production process is increased because the installation position needs to be ensured every time. Content of the Utility Model

[0003] The utility model intends to propose an extrusion mechanism for tire treads, which can effectively reduce the replacement frequency of the pre-orifice plate, not only ensure production continuity and production efficiency, but also facilitate quality control.

[0004] For this reason, the technical solution adopted by the utility model is as follows: an extrusion mechanism for tire treads, including an orifice box, in which an orifice plate and a pre-orifice plate are arranged side by side in the front and back. A first wing rubber groove for the wing rubber to flow through, a first tread rubber groove for the tread rubber to flow through, and a first bottom rubber groove for the bottom rubber to flow through are arranged through the pre-orifice plate from front to back, and the first wing rubber groove, the first tread rubber groove, and the first bottom rubber groove are arranged at intervals up and down;

[0005] A second wing rubber groove for the wing rubber to flow through, a second tread rubber groove for the tread rubber to flow through, and a second bottom rubber groove for the bottom rubber to flow through are arranged on the orifice plate. A compounding groove for compounding rubber materials is also arranged on the orifice plate. The second wing rubber groove, the second tread rubber groove, and the second bottom rubber groove are arranged at intervals up and down at the rear end of the orifice plate. The compounding groove is arranged at the front end of the orifice plate, and the front ends of the second wing rubber groove, the second tread rubber groove, and the second bottom rubber groove are all communicated with the rear end of the compounding groove.

[0006] As a preference in the above solution, the orifice plate includes an upper orifice plate and a lower orifice plate arranged up and down. An inlay block is arranged at the lower end of the upper orifice plate. The second tread rubber groove and the compounding groove are arranged between the upper orifice plate and the lower orifice plate. The second wing rubber groove is arranged between the inlay block and the upper orifice plate and is inclined downward from front to back. The second bottom rubber groove is arranged on the lower orifice plate and is inclined upward from front to back.

[0007] Further preferably, two first wing rubber grooves and two second wing rubber grooves are both arranged at intervals left and right.

[0008] Further preferably, the first wing rubber groove, the first tread rubber groove, the first bottom rubber groove, the second tread rubber groove, the second bottom rubber groove and the composite groove are all set as linear straight grooves.

[0009] Further preferably, the width of the front end of the first wing rubber groove is not less than that of the rear end, and the first wing rubber groove is inclined downward from front to back.

[0010] Further preferably, the first bottom rubber groove is inclined upward from front to back, and the widths of the front and rear ends of the first bottom rubber groove match each other.

[0011] Further preferably, the first tread rubber groove is inclined upward from front to back, and the height of the first tread rubber groove gradually decreases from back to front.

[0012] The beneficial effects of the present utility model are as follows: Rubber grooves for wing rubber, tread rubber and bottom rubber to flow through are provided on the pre-profile plate and the profile plate, so that the rubber compound can be drained through the rubber grooves and then the rubber compound is compounded in the composite groove; Since the width of the front end of the first wing rubber groove is greater than that of the rear end, it can adapt to the flow of wing rubber with different widths of treads, that is, it can effectively reduce the number of pre-profile plates, thereby reducing the replacement frequency of the pre-profile plates, ensuring production continuity and production efficiency, facilitating quality control. It is found in the actual production process that the production efficiency reduction caused by the replacement of the pre-profile can be increased by 20%, and the return rubber generated by the replacement of the pre-profile can be reduced by 15%; At the same time, the second wing rubber groove is arranged between the insert block and the upper profile plate, so that it can realize the drainage of the wing rubber through the insert block, which not only facilitates the compounding of the rubber compound, but also can realize different specifications of treads by replacing the insert block. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the pre-profile plate in the present utility model (the upper figure is the front view, and the lower figure is the rear view).

[0014] Figure 2 It is a schematic diagram of the profile plate in the present utility model (the upper left figure is the front view, the upper right figure is the cross-sectional view along the cutting line, and the lower figure is the rear view).

[0015] Figure 3 It is a schematic diagram of the rubber compound when entering the pre-profile plate in the present utility model (the red is the wing rubber, the yellow is the tread rubber, and the green is the bottom rubber).

[0016] Figure 4 It is a schematic diagram of the rubber compound when leaving the pre-profile plate in the present utility model (the red is the wing rubber, the yellow is the tread rubber, and the green is the bottom rubber).

[0017] Figure 5 It is a schematic diagram of the rubber compound when leaving the profile plate in the present utility model (one kind of tread, the red is the wing rubber, the yellow is the tread rubber, and the green is the bottom rubber).

[0018] Reference numerals: orifice plate - 1, upper orifice plate - 11, lower orifice plate - 12, insert block - 13, pre - orifice plate - 2, first wing rubber groove - 2a, first tread rubber groove - 2b, first bottom rubber groove - 2c. Detailed implementation manners

[0019] The following is a further description of the present utility model through embodiments in conjunction with the drawings:

[0020] As Figures 1-5 shown, an extrusion mechanism for a tire tread mainly consists of an orifice box, an orifice plate 1 and a pre - orifice plate 2, wherein the orifice plate 1 and the pre - orifice plate 2 are arranged side by side front - to - back in the orifice box. The orifice box is a prior art and will not be elaborated here.

[0021] On the pre - orifice plate 2, there are a first wing rubber groove 2a for the wing rubber to flow through, a first tread rubber groove 2b for the tread rubber to flow through, and a first bottom rubber groove 2c for the bottom rubber to flow through, which are arranged at intervals up and down.

[0022] On the orifice plate 1, there are a second wing rubber groove for the wing rubber to flow through, a second tread rubber groove for the tread rubber to flow through, and a second bottom rubber groove for the bottom rubber to flow through. On the orifice plate 1, there is also a composite groove for composite rubber materials. Among them, the second wing rubber groove, the second tread rubber groove and the second bottom rubber groove are arranged at intervals up and down at the rear end of the orifice plate 1, the composite groove is arranged at the front end of the orifice plate 1, and the front ends of the second wing rubber groove, the second tread rubber groove and the second bottom rubber groove are all communicated with the rear end of the composite groove. And the rear end of the second wing rubber groove corresponds to the front end of the first wing rubber groove, the rear end of the second tread rubber groove corresponds to the front end of the first tread rubber groove, and the rear end of the second bottom rubber groove corresponds to the front end of the first bottom rubber groove.

[0023] With the above - mentioned structure, after the rubber material is extruded from the head, it can enter the respective rubber grooves correspondingly to be further compressed and shaped, and finally be compounded in the composite groove to form a tread.

[0024] To make this extrusion mechanism applicable to different - sized treads, the orifice plate includes an upper orifice plate 11 and a lower orifice plate 12 arranged up and down. At the same time, an insert block 13 is arranged at the lower end of the upper orifice plate 11. Among them, the second tread rubber groove and the composite groove are arranged between the upper orifice plate 11 and the lower orifice plate 12, the second wing rubber groove is arranged between the insert block 13 and the upper orifice plate 11 and is inclined downward from front to back, and the second bottom rubber groove is arranged on the lower orifice plate 12 and is inclined upward from front to back, so that the shape during the composite of the wing rubber can be realized by replacing the insert block, and different - sized treads can be realized by replacing the upper and lower orifice plates. Therefore, the shapes of the second wing rubber groove, the second tread rubber groove and the second bottom rubber groove are not fixed and are set according to needs.

[0025] To ensure the wing rubber on both sides of the tread, two first wing rubber grooves 2a and two second wing rubber grooves are arranged at intervals left and right.

[0026] To ensure the smooth flow of the rubber compound, the first wing rubber groove 2a, the first tread rubber groove 2b, the first bottom rubber groove 2c, the second tread rubber groove, the second bottom rubber groove and the composite groove are all set as linear straight grooves.

[0027] The first wing rubber groove 2a is arranged between the upper end of the pre-profile plate and the profile box, and the first wing rubber groove 2a is inclined downward from front to back. The width of the front end of the first wing rubber groove 2a is not less than the width of the rear end, that is, the width of the rubber outlet on the pre-profile plate increases. It can not only adapt to the flow of the wing rubber of different widths of the tread, but also reduce the head pressure of the wing rubber outlet, thereby reducing the failures caused by excessive pressure.

[0028] Preferably, the first bottom rubber groove is arranged between the lower end of the pre-profile plate and the profile box. The first bottom rubber groove 2c is inclined upward from front to back, and the widths of the front and rear ends of the first bottom rubber groove 2c match. The first tread rubber groove is arranged in the middle of the pre-profile plate. The first tread rubber groove 2b is inclined upward from front to back, and the height of the first tread rubber groove 2b gradually decreases from back to front.

Claims

1. An extrusion mechanism for a tire tread, comprising an orifice plate box, wherein an orifice plate (1) and a pre-orifice plate (2) are arranged side by side in the front and back in the orifice plate box, and the features are as follows: A first wing rubber groove (2a) through which the wing rubber flows, a first tread rubber groove (2b) through which the tread rubber flows, and a first bottom rubber groove (2c) through which the bottom rubber flows are provided in the pre-die plate (2) in a front-to-back through manner, and the first wing rubber groove (2a), the first tread rubber groove (2b), and the first bottom rubber groove (2c) are arranged at intervals in the up-and-down direction; A second wing rubber groove through which the wing rubber flows, a second tread rubber groove through which the tread rubber flows, and a second bottom rubber groove through which the bottom rubber flows are provided on the die plate (1). A compounding groove for compounding rubber materials is also provided on the die plate (1). The second wing rubber groove, the second tread rubber groove, and the second bottom rubber groove are arranged at intervals in the up-and-down direction at the rear end of the die plate (1). The compounding groove is provided at the front end of the die plate (1), and the front ends of the second wing rubber groove, the second tread rubber groove, and the second bottom rubber groove are all communicated with the rear end of the compounding groove.

2. The extrusion mechanism of the tire tread according to claim 1, characterized in that: The die plate (1) includes an upper die plate (11) and a lower die plate (12) arranged up and down. An insert block (13) is provided at the lower end of the upper die plate (11). The second tread rubber groove and the compounding groove are provided between the upper die plate (11) and the lower die plate (12). The second wing rubber groove is provided between the insert block (13) and the upper die plate (11) and is inclined downward from front to back. The second bottom rubber groove is provided on the lower die plate (12) and is inclined upward from front to back.

3. The extrusion mechanism of the tire tread according to claim 1, characterized in that: Two first wing rubber grooves (2a) are arranged at intervals left and right.

4. The extrusion mechanism of the tire tread according to claim 1, characterized in that: The first wing rubber groove (2a), the first tread rubber groove (2b), the first bottom rubber groove (2c), the second tread rubber groove, the second bottom rubber groove, and the compounding groove are all arranged as linear straight grooves.

5. The extrusion mechanism of the tire tread according to claim 1, characterized in that: The width of the front end of the first wing rubber groove (2a) is not less than the width of the rear end, and the first wing rubber groove (2a) is inclined downward from front to back.

6. The extrusion mechanism of the tire tread according to claim 1, characterized in that: The first bottom rubber groove (2c) is inclined upward from front to back, and the widths of the front and rear ends of the first bottom rubber groove (2c) are matched.

7. The extrusion mechanism of the tire tread according to claim 1, characterized in that: The first tread rubber groove (2b) is inclined upward from front to back, and the height of the first tread rubber groove (2b) gradually decreases from back to front.

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