Extrusion guide plate for sidewall rubber

Abstract

The utility model provides an extrusion guide plate for sidewall rubber, which solves the technical problems that the sidewall extrusion speed can be improved in order to improve the extrusion efficiency when the sidewall is extruded by the existing extruder, but the rubber discharge temperature exceeds the standard and the production requirement cannot be met, and can be widely applied to the field of tire production. The device specifically comprises a main plate, the main plate is in a trapezoid shape, a transition groove matched with a screw extrusion opening of the extruder is formed in the short bottom edge of the main plate, the tail end of the transition groove is connected with a glue runner, and the middle of the glue runner is divided into two symmetrical parts by a glue dividing plate; the rubber distributing plate is triangular and is gradually widened in the sidewall rubber flowing direction, the surface of each rubber runner is provided with a shaping slope surface, the thickness of each shaping slope surface is gradually increased and then gradually decreased in the sidewall rubber flowing direction, and the height change boundary of each shaping slope surface is shaped like an inverted Chinese character'chang '; fixing edges higher than the glue runner are arranged on the two sides of the main plate, and a plurality of mounting holes are formed in the fixing edges and used for fixing the main plate to the position of the screw extrusion opening.

Description

Technical Field

[0001] The utility model belongs to the technical field of tire production, and particularly relates to an extrusion deflector for sidewall rubber. Background Art

[0002] The production of the sidewall of a tire is one of the important links in the tire manufacturing process, involving the manufacture and processing of the sidewall part of the tire. The sidewall is the outer edge part of the tire, located at the upper and lower ends of the tire, and plays a key role in protecting the internal structure of the tire, enhancing the strength and bearing capacity of the tire. The production of the sidewall not only requires strong physical properties but also needs to meet the requirements of aesthetics and safety. Therefore, it is highly valued in the tire manufacturing process.

[0003] When the existing extruder extrudes the sidewall, in order to improve the extrusion efficiency, the extrusion speed of the sidewall is increased, but the discharge temperature exceeds the standard and cannot meet the production requirements. Content of the Utility Model

[0004] The purpose of the utility model is to solve the above technical deficiencies and provide an extrusion deflector for sidewall rubber.

[0005] For this reason, the utility model provides an extrusion deflector for sidewall rubber, which includes a main board. The main board is trapezoidal. A transition groove adapted to the screw extrusion outlet of the extruder is provided on the shorter bottom edge of the main board. The end of the transition groove is connected to a rubber flow channel, and the middle of the rubber flow channel is divided into two symmetrical parts by a dividing board. The dividing board is triangular and gradually widens along the flowing direction of the sidewall rubber. Each rubber flow channel surface is provided with a shaping slope surface. The thickness of the shaping slope surface gradually increases first and then gradually decreases along the flowing direction of the sidewall rubber. The height change dividing line of the shaping slope surface is in an inverted "factory" shape.

[0006] Further, the bending point of the dividing line of the shaping slope surface is 70 millimeters away from the vertical center line, and the bending radian is an arc with a radius of 45 millimeters; the slope before the horizontal dividing line of the shaping slope surface along the flowing direction of the sidewall rubber is 13 degrees, and the slope after the horizontal dividing line of the shaping slope surface along the flowing direction of the sidewall rubber is 7 degrees; the slope before the inclined dividing line of the shaping slope surface along the flowing direction of the sidewall rubber is 10 degrees, and the slope after the inclined dividing line of the shaping slope surface along the flowing direction of the sidewall rubber is 13 degrees.

[0007] Further, the width of the transition groove is 200 millimeters and the length is 25 millimeters; the bottom edge of the dividing board is 120 millimeters, and the width of the end outlet of the rubber flow channel is 225 millimeters.

[0008] Further, fixed edges higher than the rubber flow channel are provided on both sides of the main board, and a plurality of mounting holes are provided on the fixed edges for fixing the main board at the position of the screw extrusion outlet.

[0009] The utility model provides an extrusion deflector for sidewall rubber, which has the following beneficial effects:

[0010] The shaping slope surface makes the flow rates of the sidewall rubber at the horizontal demarcation line and the inclined demarcation line different through a specific slope, and there is no dead rubber that no longer flows, reducing the discharging temperature. Furthermore, it adjusts the distribution density of the sidewall rubber after flowing out of the rubber flow channel, and finally makes the distribution density of the sidewall rubber reaching the end of the rubber flow channel the same, enabling the production of the sidewall at a faster extrusion speed of the sidewall rubber and improving the extrusion efficiency. Brief Description of the Drawings

[0011] Figure 1 is the front view of the present utility model;

[0012] Figure 2 is Figure 1 the sectional view along A - A in

[0013] Figure 3 is Figure 1 the sectional view along B - B in

[0014] Markings in the figure: 1, main board; 2, shaping slope surface; 3, rubber dividing board; 4, fixed edge; 5, transition groove; 6, mounting hole; 7, rubber flow channel; 8, horizontal demarcation line; 9, inclined demarcation line. Detailed Embodiment

[0015] The following further illustrates the present utility model in conjunction with the drawings and specific embodiments to facilitate understanding of the content of the present utility model. The methods used in the present utility model are all conventional methods unless otherwise specified; the raw materials and devices used are all conventional commercially available products unless otherwise specified.

[0016] As Figure 1 shown, the present utility model provides an extrusion deflector for sidewall rubber, including a main board 1. The main board 1 is trapezoidal as a whole. A transition groove 5 adapted to the screw extrusion outlet of the extruder is provided on the shorter bottom edge of the main board 1. The transition groove 5 and the screw extrusion outlet are in the same plane to ensure that the sidewall rubber can smoothly enter the transition groove 5. The end of the transition groove 5 is connected to a rubber flow channel 7. The middle of the rubber flow channel 7 is divided into two symmetrical parts by a rubber dividing board 3. The rubber dividing board 3 is triangular and gradually widens along the flow direction of the sidewall rubber. A shaping slope surface 2 is provided on the surface of each rubber flow channel 7. The thickness of the shaping slope surface 2 first gradually increases and then gradually decreases along the flow direction of the sidewall rubber. The height change demarcation line of the shaping slope surface 2 is in an inverted "factory" shape. The end outlet of the rubber flow channel 7 is adapted to the rubber channel inlet of the pre - die, enabling the sidewall rubber to be more smoothly extruded into the rubber channel of the pre - die.

[0017] Fixed edges 4 higher than the rubber flow channel 7 are provided on both sides of the main board 1. Multiple mounting holes 6 are provided on the fixed edges 4 for fixing the main board 1 at the position of the screw extrusion outlet.

[0018] As Figure 2As shown in Figure 3, the width of the transition groove 5 is 200 mm and the length is 25 mm; the bottom edge of the rubber distribution plate 3 is 120 mm, and the end outlet width of the rubber flow channel 7 is 225 mm; the bending point of the dividing line of the shaping slope 2 is 70 mm away from the vertical center line, and the bending arc is an arc with a radius of 45 mm. The slope of the shaping slope 2 before the horizontal dividing line 8 along the rubber flow direction of the tire sidewall is 13 degrees, and the slope of the shaping slope 2 after the horizontal dividing line 8 along the rubber flow direction of the tire sidewall is 7 degrees; the slope of the shaping slope 2 before the inclined dividing line 9 along the rubber flow direction of the tire sidewall is 10 degrees, and the slope of the shaping slope 2 after the inclined dividing line 9 along the rubber flow direction of the tire sidewall is 13 degrees.

[0019] In use, the main board 1 is fixed at the screw outlet. The screw outlet presses out the sidewall rubber. The sidewall rubber first passes through the transition groove 5, and then is divided into two parts by the rubber separating plate 3 before entering the rubber flow channel 7. The shaping slope 2, through a specific slope, makes the flow rate of the sidewall rubber different when reaching the horizontal dividing line 8 and the inclined dividing line 9, thereby adjusting the distribution density of the sidewall rubber after flowing out of the rubber flow channel 7. Ultimately, it makes the distribution density of the sidewall rubber at the end of the rubber flow channel 7 the same, enabling the production of sidewalls at a faster extrusion speed and improving extrusion efficiency.

[0020] The principle of adjusting the distribution density of the sidewall rubber on the shaping slope 2 is as follows: the slope of the sidewall rubber is larger before reaching the horizontal dividing line 8, the flow rate of the sidewall rubber is slower, the distribution density increases, and the sidewall rubber will partially accumulate, so that the distribution density of the sidewall rubber flowing out near the vertical center increases; the slope of the sidewall rubber is smaller before reaching the inclined dividing line 9, the flow rate of the sidewall rubber is faster, the distribution density decreases, the sidewall rubber does not accumulate, so that the distribution density of the sidewall rubber flowing out near the vertical center line remains unchanged, and finally the distribution density of the sidewall rubber reaching the end of the rubber flow channel 7 is the same.

[0021] It should be noted that the sidewall rubber will flow faster when it flows along the side of the rubber flow channel 7 and the fixed edge 4 due to the solid boundary. This results in a higher distribution density of the sidewall rubber on the side away from the vertical center line than on the side closer to the vertical center line. This uneven distribution density of the sidewall rubber means that when the sidewall rubber enters the pre-cut rubber channel, it cannot completely fill the pre-cut rubber channel, resulting in insufficient rubber and making it impossible for the produced sidewall size to meet production requirements.

[0022] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A sidewall rubber extrusion guide plate, comprising a main board, the main board being trapezoidal, characterized in that, A transition groove adapted to the screw extrusion outlet of the extruder is provided on the shorter bottom edge of the main board. The end of the transition groove is connected to a rubber flow channel, and the middle of the rubber flow channel is divided into two symmetrical parts by a rubber dividing plate; the rubber dividing plate is triangular and gradually widens along the direction of the sidewall rubber flow. Each rubber flow channel surface is provided with a shaping slope surface, the thickness of the shaping slope surface gradually increases first and then gradually decreases along the direction of the sidewall rubber flow, and the height change demarcation line of the shaping slope surface is in an inverted "factory" shape.

2. The sidewall rubber extrusion guide plate according to claim 1, characterized in that, The bending point of the demarcation line of the shaping slope surface is 70 mm away from the vertical center line, and the bending arc is a circular arc with a radius of 45 mm; the slope before the horizontal demarcation line of the shaping slope surface along the direction of the sidewall rubber flow is 13 degrees, and the slope after the horizontal demarcation line of the shaping slope surface along the direction of the sidewall rubber flow is 7 degrees; the slope before the inclined demarcation line of the shaping slope surface along the direction of the sidewall rubber flow is 10 degrees, and the slope after the inclined demarcation line of the shaping slope surface along the direction of the sidewall rubber flow is 13 degrees.

3. The sidewall rubber extrusion guide plate according to claim 1, characterized in that, The width of the transition groove is 200 mm and the length is 25 mm; the bottom edge of the rubber dividing plate is 120 mm, and the width of the end outlet of the rubber flow channel is 225 mm.

4. The extrusion guide plate for the sidewall rubber according to any one of claims 1-3, characterized in that, Fixed edges higher than the rubber flow channel are provided on both sides of the main board, and multiple mounting holes are provided on the fixed edges for fixing the main board at the position of the screw extrusion outlet.

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