PCR (Polymerase Chain Reaction) tread preformed mouth-shaped plate
By redesigning the flow channel size of the PCR tread pre-mouth plate and setting up columns, the problems of high temperature and low efficiency in the existing technology are solved, and efficient tread production is achieved without changing the screw condition.
Patent Information
- Application Number
- CN202422796901.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-18
AI Technical Summary
On existing PCR tread production lines, when using existing pre-die plates, the extrusion temperature is too high, affecting the quality of the finished tread product, and reducing the screw speed will lead to reduced efficiency.
A PCR tread pre-mouth plate was designed, the dimensions of the first and second tread rubber flow channels were readjusted, and pillars were set in the flow channels to maintain the shape, ensuring that the discharge temperature of the rubber material was reduced while the screw speed and diameter remained unchanged.
While maintaining production efficiency, the rubber discharge temperature is reduced, ensuring the quality of the finished tread.
Smart Images
Figure CN223354892U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pre-cut profiles, in particular to a PCR tread pre-cut profile. Background Art
[0002] The tire crown, also known as the tread, is the component that comes into direct contact with the ground. Based on its performance, this component is required to have good wear resistance, puncture resistance, high temperature resistance, and heat dissipation properties. The tread is mostly produced by extrusion in the form of fully layered double-composite or multi-composite materials. That is, the tread component consists of an upper layer of tread rubber with outstanding wear resistance and puncture resistance, and a lower layer of base rubber with excellent heat dissipation and high temperature resistance.
[0003] In the existing PCR tread production line, the tread rubber is extruded from two extrusion ports, but the screw specifications and speeds of the two extrusion ports are different. Figure 4 The figure shows the dimensions of the existing pre-mouth plate. When the existing pre-mouth plate is used, the temperature of the extrusion and glue discharge will be too high, affecting the quality of the finished tread. If the screw speed is reduced, the tread extrusion efficiency will be reduced. Utility Model Content
[0004] The purpose of the utility model is to solve the deficiencies of the above-mentioned technology and provide a PCR tread pre-mouth plate.
[0005] To this end, the present invention provides a PCR tread pre-form plate, comprising a main plate in the shape of a quadrangular pyramid with trapezoidal side surfaces. Two open tire wing rubber flow channels are formed on the top of the main plate, symmetrically about a vertical centerline. The two tire wing rubber flow channels run from the back of the main plate toward the vertical centerline on the front of the main plate; the tire wing rubber flow channels gradually narrow from the tire wing rubber inlet to the tire wing rubber outlet.
[0006] A first tread rubber flow channel and a second tread rubber flow channel are provided in the middle of the main board, which are symmetrical with the horizontal center line. The first tread rubber flow channel and the second tread rubber flow channel run from the back of the main board to the horizontal center line of the front of the main board and are connected at the end to form a tread rubber outlet; the tread rubber flow channel gradually widens from the tread rubber inlet to the tread rubber outlet.
[0007] A base glue flow channel with an open bottom surface is provided at the bottom of the main board, and the base glue flow channel gradually narrows from the base glue inlet to the base glue outlet.
[0008] Furthermore, the width of the tire wing rubber inlet is 150 mm and the height is 20 mm, and the width of the tire wing rubber outlet is 145 mm and the height is 12 mm;
[0009] The width of the first tread rubber inlet and the second tread rubber inlet are both 380 mm and the height is 25 mm. The width of the tread rubber outlet is 400 mm and the height is 16.5 mm.
[0010] The width of the base glue inlet is 420 mm and the height is 20 mm, and the width of the base glue outlet is 400 mm and the height is 15.3 mm.
[0011] Furthermore, the top edge of the first tread rubber flow channel is 10 mm away from the horizontal center line, and the bottom edge of the second tread rubber flow channel is 6.5 mm away from the horizontal center line.
[0012] Furthermore, columns adapted to the shapes of the channels are further provided in the first tread rubber flow channel and the second tread rubber flow channel, and the columns are used to maintain the shapes of the channels of the first tread rubber flow channel and the second tread rubber flow channel.
[0013] The utility model provides a PCR tread pre-mouth plate, which has the following beneficial effects:
[0014] The utility model can, under the premise that the screw speed and screw diameter of different extrusion outlets of the current PCR production line remain unchanged, effectively reduce the rubber discharge temperature by redesigning the sizes of the first tread rubber flow channel and the second tread rubber flow channel of the pre-mouth plate, thereby ensuring the tread extrusion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a front view of the utility model;
[0016] Figure 2 It is a rear view of the utility model;
[0017] Figure 3 yes Figure 1 Cross-section along AA;
[0018] Figure 4 This is the dimensional drawing of the existing pre-mouth plate;
[0019] Figure 5 It is the dimension drawing of the utility model;
[0020] Figure 6 This is a dimensional diagram of the tread rubber outlet from the horizontal center line of the utility model;
[0021] Markings in the figure: 1, main board; 2, tread rubber inlet; 3, first tread rubber inlet; 4, second tread rubber inlet; 5, base rubber inlet; 6, tread rubber flow channel; 7, first tread rubber flow channel; 8, second tread rubber flow channel; 9, base rubber flow channel; 10, tread rubber outlet; 11, tread rubber outlet; 12, base rubber outlet; 13, pillar. DETAILED DESCRIPTION
[0022] The present invention is further described below with reference to the accompanying drawings and specific embodiments to facilitate understanding of the present invention. The methods used in the present invention are conventional methods unless otherwise specified; the raw materials and devices used are conventional commercially available products unless otherwise specified.
[0023] like Figure 1-3 As shown in Figure 5, the present invention provides a PCR tread pre-groove plate, comprising a main plate 1 in the shape of a quadrangular pyramid with trapezoidal side surfaces. Two wing rubber flow channels 6, symmetrically located about a vertical centerline, are formed on the top of the main plate 1. The two wing rubber flow channels 6 run from the back of the main plate 1 toward the vertical centerline of the front of the main plate 1. The wing rubber flow channels 6 gradually narrow from the wing rubber inlet 2 to the wing rubber outlet 10. The wing rubber inlet 2 has a width of 150 mm and a height of 20 mm; the wing rubber outlet 10 has a width of 145 mm and a height of 12 mm.
[0024] The main board 1 has a first tread rubber flow channel 7 and a second tread rubber flow channel 8 symmetrically arranged along the horizontal centerline. The first tread rubber flow channel 7 and the second tread rubber flow channel 8 run from the back of the main board 1 toward the horizontal centerline of the front of the main board 1 and are connected at the ends to form a tread rubber outlet 11. The tread rubber flow channel gradually widens from the tread rubber inlet to the tread rubber outlet 11. The first tread rubber inlet 3 and the second tread rubber inlet 4 are both 380 mm wide and 25 mm high. The tread rubber outlet 11 is 400 mm wide and 16.5 mm high. Figure 6 As shown, the top edge of the first tread rubber flow channel 7 is 10 mm away from the horizontal center line, and the bottom edge of the second tread rubber flow channel 8 is 6.5 mm away from the horizontal center line.
[0025] The bottom of the main plate 1 is provided with an open base rubber flow channel 9, which gradually narrows from the base rubber inlet 5 to the base rubber outlet 12. The base rubber inlet 5 is 420 mm wide and 20 mm high; the base rubber outlet 12 is 400 mm wide and 15.3 mm high. The thickness between the top edge of the base rubber outlet 12 and the bottom edge of the tread rubber outlet 11 is 3.5 mm. By increasing the thickness between the top edge of the base rubber outlet 12 and the bottom edge of the tread rubber outlet 11, the direction of the base rubber flow channel 9 is changed, ensuring that the base rubber thickness on the tread still meets product quality requirements even after the pre-die plate is resized.
[0026] On the premise that the screw speed and screw diameter of different extruders of the current PCR production line remain unchanged, the utility model redesigns the dimensions of the first tread rubber flow channel 7 and the second tread rubber flow channel 8 of the pre-mouth plate, which can effectively reduce the rubber discharge temperature and ensure the tread extrusion efficiency.
[0027] In this embodiment, the diameter of the first screw corresponding to the first tread rubber flow channel 7 is 200 mm, the diameter of the second screw corresponding to the second tread rubber flow channel 8 is 150 mm, and the speed ratio of the first screw to the second screw is 1:1.15. At this time, the rubber discharge ratio of the first screw to the second screw is 1.5. Under these conditions, compared with the existing pre-mouth plate, the present invention adjusts the height of the tread rubber outlet 11, thereby changing the dividing line between the two groups of tread rubber, so that the rubber discharge ratio of the first tread rubber flow channel 7 to the second tread rubber flow channel 8 also reaches 1.5, maintaining the original rubber extrusion efficiency while ensuring the quality requirements of the extruded tread product.
[0028] The first tread rubber flow channel 7 and the second tread rubber flow channel 8 are further provided with upright posts 13 adapted to the flow channel shapes. The upright posts 13 are used to maintain the flow channel shapes of the first tread rubber flow channel 7 and the second tread rubber flow channel 8 and reduce deformation of the pre-mouth plate after long-term use.
[0029] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "middle", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0030] However, the above description is merely a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention should still fall within the scope covered by the claims of the present invention.
Claims
1. A PCR tread pre-mold plate, comprising a main plate, the main plate being in the shape of a quadrangular pyramid with trapezoidal sides, characterized in that: Two wing rubber flow channels are symmetrically opened on the top of the mainboard and are symmetrical about the vertical centerline. The two wing rubber flow channels run from the back of the mainboard toward the vertical centerline on the front of the mainboard. The wing rubber flow channels gradually narrow from the wing rubber inlet to the wing rubber outlet. A first tread rubber flow channel and a second tread rubber flow channel are provided in the middle of the main plate, symmetrically about the horizontal centerline. The first and second tread rubber flow channels run from the back of the main plate toward the horizontal centerline of the front of the main plate and are connected at the ends to form a tread rubber outlet. The tread rubber flow channel gradually widens from the tread rubber inlet to the tread rubber outlet. A base glue flow channel with an open bottom surface is provided at the bottom of the main board, and the base glue flow channel gradually narrows from the base glue inlet to the base glue outlet.
2. The PCR tread pre-mouth plate according to claim 1, characterized in that: The width of the tire wing rubber inlet is 150 mm and the height is 20 mm. The width of the tire wing rubber outlet is 145 mm and the height is 12 mm. The width of the first tread rubber inlet and the second tread rubber inlet are both 380 mm and the height is 25 mm. The width of the tread rubber outlet is 400 mm and the height is 16.5 mm. The width of the base glue inlet is 420 mm and the height is 20 mm, and the width of the base glue outlet is 400 mm and the height is 15.3 mm.
3. The PCR tread pre-mouth plate according to claim 2, characterized in that: The top edge of the first tread rubber flow channel is 10 mm away from the horizontal center line, and the bottom edge of the second tread rubber flow channel is 6.5 mm away from the horizontal center line.
4. The PCR tread pre-mouth plate according to claim 2, characterized in that: The thickness between the top edge of the base rubber outlet and the bottom edge of the tread rubber outlet is 3.5 mm.
5. The PCR tread pre-mouth plate according to any one of claims 1 to 4, characterized in that: The first tread rubber flow channel and the second tread rubber flow channel are further provided with upright posts adapted to the shapes of the flow channels, and the upright posts are used to maintain the shapes of the flow channels of the first tread rubber flow channel and the second tread rubber flow channel.