CN102529596A - Rubber and plastic composite tire tread - Google Patents

Abstract

The invention discloses a rubber-plastic composite tire tread. The main body of the tread is rubber, and pattern grooves and pattern blocks surrounded by pattern grooves are arranged on the tread surface. A polyurethane insert is located in the pattern block. The upper surface of the polyurethane insert has a There are independent patterns, the upper surface of the polyurethane insert is flush with the rubber tire tread or slightly higher than the rubber tire tread, the periphery of the polyurethane insert is provided with grooves around the polyurethane insert, and the groove types are grooves, stepped grooves or The raised, polyurethane insert fits over the ply and is secured within the tread block. The invention discloses a rubber-plastic composite tire tread. The polyurethane part improves the wear resistance of the tire, while the rubber part ensures the dynamic performance of the tire. The comprehensive performance is better than that of single-material rubber tread and polyurethane tread. At the same time, with the wear of the tread pattern grooves, new grooves appear on the composite tread, the gripping performance of the tire will not be reduced, and good safety performance can still be maintained.

Description

A rubber-plastic composite tire tread

technical field

The invention relates to a tire tread, in particular to a rubber-plastic composite tread for automobile tires.

Background technique

Tire is one of the important parts of the car. It is in direct contact with the ground, and together with the suspension of the car, it alleviates the impact of the car when it is running, and bears the weight of the car at the same time. The traditional tire tread is made of rubber material, which has the advantages of good dynamic performance, excellent elasticity, low heat generation during driving, and comfortable ride, but its poor wear resistance seriously affects the life of the tire and leads to the generation of waste tires , Also caused "black pollution". Even after formula modification, the improvement of its wear resistance is still very limited, and some substances added have serious pollution to the environment.

With the enhancement of people's awareness of environmental protection, tire treads with higher wear resistance have been gradually developed. Chinese patent 200310111979.1 proposes to replace the rubber tread with polyurethane tread, which greatly improves the wear resistance of the tire, but the dynamic performance of the tire decreases. Chinese patent 200720039674.8 proposes a polyurethane rubber combined tire tread. The polyurethane is located in the groove on the rubber body, and its comprehensive performance is better than that of a single rubber tread and polyurethane tread. The grip force of the car is reduced, and the driving safety is deteriorated. At the same time, the wear resistance of the polyurethane under the pattern groove cannot be fully utilized.

Contents of the invention

The purpose of the present invention is to provide a rubber-plastic composite tire tread with good wear resistance and high grip performance. The tread can overcome the disadvantages of poor tread wear resistance of a single rubber material tread, poor dynamic performance and safety performance of a single polyurethane tread, and poor gripping performance of a polyurethane rubber combined tire tread mentioned in the above patent. It is convenient, the cycle is short, the performance of the polyurethane material can be fully utilized, and the comprehensive performance is significantly improved, thereby prolonging the service life of the tire.

In order to achieve the above object, the present invention adopts the following technical solutions: a rubber-plastic composite tire tread, the main body of the tread is a rubber body, there are pattern grooves and pattern blocks surrounded by pattern grooves on the tread, and the polyurethane insert is located Inside the lug block, the upper surface of the polyurethane insert has a separate pattern and is flush with or slightly raised above the tire tread.

The height of the polyurethane insert of the present invention is not greater than the thickness of the tread of the tire, about 60% to 80% of the thickness of the tread, and its whole does not exceed the size of the pattern block on the tread, accounting for about 30% to 60% of the size of the pattern block. % to achieve rubber encased in polyurethane inserts. The pattern form on the upper surface of the polyurethane insert can be flexibly designed to meet different needs, such as grip, low noise, etc. The periphery of the polyurethane insert can be provided with structures such as grooves or stepped grooves in different degrees, so that the insert can be well fixed in the tread. The polyurethane insert can also be set on the ply through the surrounding grooves or stepped grooves, protrusions, etc., and then fixed in the tread block to prevent the polyurethane insert from falling off from the tire tread during tire use.

The invention is composed of a rubber body and a polyurethane insert, that is, a part of the wear-resistant surface of the tread is made of polyurethane material, and a part is made of rubber material, and the hardness of the polyurethane insert can be higher than that of the rubber body. Polyurethane inserts are obtained by injection molding, with flexible structure, convenient processing and short molding cycle. The polyurethane insert obtained by injection molding is initially bonded to the tire tread by an adhesive before the tire is vulcanized, and then it is co-vulcanized with the tire so that the tread rubber tightly wraps the polyurethane insert to form a whole. The polyurethane part improves the wear resistance of the tire, while the rubber part ensures the dynamic performance of the tire, and its comprehensive performance is better than that of a single material rubber tread and polyurethane tread. Due to the good wear resistance of polyurethane elastomer, with the gradual wear of the rubber body, the polyurethane insert gradually protrudes and bears the main contact between the tire and the road surface, which greatly reduces the further wear of the tire rubber body and improves the service life of the tire. At the same time, new grooves appear on the tread, that is, the rubber body part is sunken to form grooves due to wear, so although the original pattern grooves are ground, the grip performance of the tire will not be reduced, and good safety performance can still be maintained.

Description of drawings

Fig. 1 is a three-dimensional structure schematic diagram of a rubber-plastic composite tire tread unfolded according to the present invention.

Fig. 2 is a plan view schematic diagram of the unfolded tread of a rubber-plastic composite tire according to the present invention.

Fig. 3 is a cross-sectional view along line A-A of Fig. 2 .

Fig. 4 is a schematic structural view of a polyurethane insert for a rubber-plastic composite tire tread of the present invention.

In the figure: 1-rubber body; 2-pattern groove; 3-pattern block; 4-polyurethane insert; 5-upper surface of polyurethane insert; 6-pattern groove on surface of polyurethane insert; 7-surrounding groove of polyurethane insert groove.

Detailed ways

A rubber-plastic composite tire tread of the present invention, as shown in Figure 1, is mainly composed of rubber body material and polyurethane material. The main body of the tread is a rubber body 1, there are pattern grooves 2 on the tread, the polyurethane insert 4 is located in the pattern block 3, the upper surface of the polyurethane insert 4 has independent patterns, and is flush with the tire tread or slightly above the tire tread.

As shown in Fig. 4, the height of the polyurethane insert 4 of the present invention is about 60% to 80% of the tread thickness, and the inner projected area of the pattern block 3 on the tread accounts for about 30% to 60% of the pattern block. The upper surface 5 of the polyurethane insert can be designed with flexible and diverse pattern grooves 6 on the surface of the polyurethane insert to meet different requirements, such as gripping property and low noise. The periphery of the polyurethane insert 4 can be provided with a peripheral groove 7 of the polyurethane insert, such as grooves, stepped grooves or protrusions, so that the insert can be well fixed in the tread.

The present invention is composed of a rubber body 1 and a polyurethane insert 4, that is, a part of the wear-resistant surface of the tread is made of polyurethane material, and a part is made of rubber material. Polyurethane inserts can be obtained by injection molding, and the injection molding method has the advantages of convenient processing and short molding cycle. The polyurethane insert 4 obtained by injection molding is initially bonded to the tire tread by an adhesive before the tire is vulcanized, or is fixed in the pattern block 3 by being set in the cord, and then it is co-vulcanized with the tire. , so that the tread rubber tightly wraps the polyurethane insert 4, and at the same time, the grooves around the polyurethane insert 4 increase the contact area with the rubber body 1, which greatly improves the stability of the polyurethane insert 4 after the co-vulcanization process. The polyurethane part improves the wear resistance of the tire, while the rubber body part ensures the dynamic performance of the tire, and its comprehensive performance is better than that of a single material rubber tread or polyurethane tread. Due to the good wear resistance of the polyurethane elastomer, as the rubber body 1 wears gradually, the polyurethane insert 4 gradually protrudes, and bears the main contact force between the tire and the road surface, which greatly reduces the further wear of the tire rubber body and improves the performance of the tire. service life. At the same time, the rubber body forms a new groove due to wear and tear, and the polyurethane insert forms a new pattern block due to the small degree of wear, and because the upper surface of the polyurethane insert has an independent pattern, the original pattern groove is worn out. Flat, but the grip performance of the tire will not be reduced, and good safety performance can still be maintained.

Claims (5)

1. rubber and plastic composite tyre tyre surface; It is characterized in that: the main body of tyre surface is a rubber; The pattern block that decorative pattern groove and decorative pattern groove besieged city is arranged on the tyre surface; The polyurethane inserts is positioned at pattern block, and the upper surface of polyurethane inserts has independently decorative pattern, and the upper surface of polyurethane inserts is concordant with the rubber tire tyre surface or exceed the rubber tire tyre surface slightly.

2. a kind of rubber and plastic composite tyre tyre surface according to claim 1, it is characterized in that: the height of polyurethane inserts is 60%～80% of a tread thickness, polyurethane inserts inner projection area of pattern block 3 on tyre surface accounts for 30%～60% of pattern block.

3. a kind of rubber and plastic composite tyre tyre surface according to claim 1, it is characterized in that: the periphery of polyurethane inserts is provided with polyurethane inserts perimeter trench.

4. a kind of rubber and plastic composite tyre tyre surface according to claim 3, it is characterized in that: polyurethane inserts perimeter trench is groove, step trough or convexity.

5. a kind of rubber and plastic composite tyre tyre surface according to claim 4, it is characterized in that: the polyurethane inserts is enclosed within on the carcass plies and is fixed in the tread block.

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