Device for reducing extruded porosity of rubber compound

Abstract

The utility model belongs to the technical field of extruders, and particularly relates to a device for reducing the extrusion porosity of rubber compound, which comprises an extruder, the left side of the upper end of the extruder is fixedly connected with a feeding port, the right side of the extruder is provided with a support frame, the right side of the support frame is provided with a pre-die, and the right side of the pre-die is fixedly connected with a die plate. Two pressing rollers are installed on the inner side of the supporting frame, and the interiors of the upper end and the lower end of the supporting frame are connected with adjusting rods through threads. According to the utility model, the pair of compression rollers are arranged at the discharge hole of the extruder and are connected with the pre-die and the die plate, so that bubbles in the plasticized rubber material are removed under the extrusion of the compression rollers, the extrusion porosity of half parts is reduced, the stability of the size and the weight of the half parts is ensured, and the production efficiency is improved. And moreover, the formula of the sizing material does not need to be adjusted, and the pressure can be adjusted by adjusting the roller spacing, so that the consistency of sizing material components is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of extruders, and particularly relates to a device for reducing the air hole rate of kneaded rubber during extrusion. Background Technique

[0002] Most tires are solid rubber tires. The operating principle of the existing tire rubber extruder is to add materials into the mold, heat and melt the rubber particle raw materials through the extruder, and then extrude them through the feeding rod and send them into the tire mold. For example, the invention patent with the publication number CN109318463A discloses a rubber kneading screw extruder and a processing method, which includes a base. A support frame is arranged on the top of the base. A feed cylinder is arranged on one side of the support frame. A screw is arranged inside the feed cylinder. One end of the bottom of the feed cylinder is provided with an extrusion cylinder. A connecting pipe is arranged between the feed cylinder and the extrusion cylinder. A piston is arranged inside the extrusion cylinder. A push rod is arranged on one side of the piston. One end of the push rod is provided with a movable plate. An electric push rod is arranged on one side of the movable plate. A support column is arranged between the bottom of the feed cylinder and the base. The existing technical means mainly include replacing the screw extruder with a larger length-diameter ratio to improve the plasticizing effect of the extruder, or adding a plasticizer to the kneaded rubber to improve the plasticity of the kneaded rubber. However, the ability to improve the air hole rate of the kneaded rubber during extrusion is limited, and there are problems with changes in the formulation components. Therefore, improvements are needed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a device for reducing the air hole rate of kneaded rubber during extrusion, which solves the problems that the existing extruder has limited ability to improve the air hole rate of kneaded rubber during extrusion and there are changes in the formulation components.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A device for reducing the air hole rate of kneaded rubber during extrusion, including an extruder. A feeding port is fixedly connected to the left side of the upper end of the extruder. A support frame is arranged on the right side of the extruder. A pre-orifice is arranged on the right side of the support frame. An orifice plate is fixedly connected to the right side of the pre-orifice. Two pressure rollers are installed inside the support frame. Adjusting rods are threadedly connected to the upper and lower ends inside the support frame. One end of the adjusting rod located inside the support frame is installed with a linkage plate through a bearing. A scraping plate is fixedly connected to the side of the linkage plate close to the pressure roller, and the scraping plate abuts against the pressure roller.

[0005] Preferably, a knob is fixedly connected to the end of the adjusting rod located outside the support frame, and the knob is made of plastic. Through the setting of the knob, it is convenient to rotate the adjusting rod.

[0006] Preferably, a guide rod is fixedly connected to the side of the linkage plate away from the pressure roller. The guide rod penetrates the support frame and is slidably connected to the support frame. Through the setting of the guide rod, it has a guiding effect on the adjustment of the linkage plate.

[0007] Preferably, a spring is sleeved on the outside of the guide rod, one end of the spring being fixedly connected to the linkage plate, and the other end of the spring being fixedly connected to the inner surface of the support frame. By providing the spring, elastic force can be applied to the adjustment rod via the linkage plate, so that the adjustment rod and the threaded teeth of the support frame are more tightly engaged, thereby having a certain degree of anti-loosening effect.

[0008] Preferably, the pressing roller is in contact with the extruder, and the pressing roller is in contact with the pre-die. By setting the pressing roller, bubbles in the material discharged from the extruder can be squeezed out.

[0009] Preferably, the scraper is trapezoidal and made of rubber. The scraper is provided to facilitate scraping off excess rubber on the pressure roller.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] 1. The utility model sets a pair of pressure rollers at the discharge port of the extruder, and the pressure rollers are closely connected to the pre-die and the die plate. In this way, the bubbles inside the plasticized rubber are eliminated under the extrusion of the pressure rollers, thereby reducing the porosity of the semi-components and ensuring the stability of the size and weight of the semi-components. In addition, there is no need to adjust the rubber formula, and the pressure can be adjusted by adjusting the roller distance, thereby ensuring the consistency of the rubber components.

[0012] 2. The utility model provides linkage plates that can be adjusted by means of thread adjustment on the upper and lower ends of the pressure roller for mounting, and a scraper is provided on the linkage plate. By adjusting the position of the linkage plate, the scraper is made to contact the surface of the pressure roller, thereby scraping off the residual rubber material on the surface of the pressure roller, avoiding waste and preventing the residual material from being solidified and affecting subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 For the utility model Figure 1 A magnified view of the structure of part A.

[0015] In the figure: 1. Extruder; 2. Feed port; 3. Support frame; 4. Press roller; 5. Pre-die; 6. Die plate; 7. Adjustment rod; 8. Linkage plate; 9. Knob; 10. Scraper; 11. Guide rod; 12. Spring. DETAILED DESCRIPTION

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] Please refer to Figure 1-2 , a device for reducing the air hole rate of the kneaded rubber, including an extruder 1. A feeding port 2 is fixedly connected to the upper left side of the extruder 1. A support frame 3 is arranged on the right side of the extruder 1. A pre-die 5 is arranged on the right side of the support frame 3. And a die plate 6 is fixedly connected to the right side of the pre-die 5. Two pressure rollers 4 are installed inside the support frame 3. The pressure rollers 4 are in contact with the extruder 1 and the pressure rollers 4 are in contact with the pre-die 5. Through the arrangement of the pressure rollers 4, the air bubbles in the material discharged from the extruder 1 can be extruded.

[0018] Please refer to Figure 1-2 , adjusting rods 7 are threadedly connected to the upper and lower ends inside the support frame 3. One end of the adjusting rod 7 located inside the support frame 3 is installed with a linkage plate 8 through a bearing. And a scraper 10 is fixedly connected to one side of the linkage plate 8 close to the pressure roller 4. And the scraper 10 abuts against the pressure roller 4. A knob 9 is fixedly connected to the end of the adjusting rod 7 located outside the support frame 3. And the knob 9 is made of plastic. Through the arrangement of the knob 9, it is convenient to rotate the adjusting rod 7. The scraper 10 is trapezoidal and made of rubber. Through the arrangement of the scraper 10, it is convenient to scrape off the excess rubber material on the pressure roller 4.

[0019] Please refer to Figure 1-2 , a guide rod 11 is fixedly connected to the side of the linkage plate 8 away from the pressure roller 4. The guide rod 11 penetrates through the support frame 3 and is slidably connected to the support frame 3. Through the arrangement of the guide rod 11, it has a guiding effect on the adjustment of the linkage plate 8. A spring 12 is sleeved on the outer side of the rod body of the guide rod 11. One end of the spring 12 is fixedly connected to the linkage plate 8, and the other end of the spring 12 is fixedly connected to the inner surface of the support frame 3. Through the arrangement of the spring 12, the elastic force can act on the adjusting rod 7 through the linkage plate 8, so that the screw teeth of the adjusting rod 7 and the support frame 3 are engaged more tightly, thereby having a certain anti-loosening effect.

[0020] The specific implementation process of the present utility model is as follows: During use, the rubber compound discharged from the extruder 1 enters the pre-die 5 and the die plate 6 after being extruded and de-aerated by the pressure roller 4, and then is discharged after shaping. The plasticized rubber compound is extruded by the pressure roller 4 to remove the air bubbles inside the rubber compound, thereby reducing the porosity of the semi-component extrusion, ensuring the stability of the size and weight of the semi-component, and without the need to adjust the rubber compound formula. The pressure can be adjusted by adjusting the roll gap, ensuring the consistency of the rubber compound components. Moreover, by rotating the knob 9 to adjust the adjusting rod 7, the adjusting rod 7 undergoes displacement through the relative threaded movement with the support frame 3. Subsequently, the linkage plate 8 at the end of the adjusting rod 7 moves under the guidance of the guide rod 11 until the scraper 10 at the bottom of the linkage plate 8 touches the pressure roller 4, thereby scraping off the rubber compound remaining on the surface of the pressure roller 4. While avoiding waste, it also prevents the residual material from solidifying and affecting subsequent use.

[0021] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A device for reducing the porosity of extruded rubber compound, comprising an extruder (1), characterized in that: On the left side of the upper end of the extruder (1), a feeding port (2) is fixedly connected. On the right side of the extruder (1), a support frame (3) is provided. On the right side of the support frame (3), a pre-die (5) is provided, and a die plate (6) is fixedly connected to the right side of the pre-die (5). Inside the support frame (3), two pressure rollers (4) are installed. Inside the upper and lower ends of the support frame (3), adjusting rods (7) are connected by threads. One end of the adjusting rod (7) located inside the support frame (3) is installed with a linkage plate (8) through a bearing, and a scraper (10) is fixedly connected to the side of the linkage plate (8) close to the pressure roller (4), and the scraper (10) abuts against the pressure roller (4).

2. The device for reducing the extrusion porosity of the mixed rubber according to claim 1, characterized in that: One end of the adjusting rod (7) located outside the support frame (3) is fixedly connected with a knob (9), and the knob (9) is made of plastic material.

3. The device for reducing the extrusion porosity of the mixed rubber according to claim 1, characterized in that: On the side of the linkage plate (8) away from the pressure roller (4), a guide rod (11) is fixedly connected. The guide rod (11) penetrates the support frame (3) and is slidably connected to the support frame (3).

4. The device for reducing the extrusion porosity of the mixed rubber according to claim 3, wherein: A spring (12) is sleeved on the outer side of the rod body of the guide rod (11). One end of the spring (12) is fixedly connected to the linkage plate (8), and the other end of the spring (12) is fixedly connected to the inner surface of the support frame (3).

5. The device for reducing the extrusion porosity of the mixed rubber according to claim 1, characterized in that: The pressure roller (4) contacts the extruder (1), and the pressure roller (4) contacts the pre-die (5).

6. The device for reducing the extrusion porosity of the mixed rubber according to claim 1, characterized in that: The scraper (10) is trapezoidal and made of rubber material.

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