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Tire retreading method and retreaded tire

A tire retreading and tire technology, which is applied in the field of tire production, can solve the problems of carcass rubber secondary damage, reduce tire service life, increase tire use cost, etc., so as to avoid tread damage, increase tensile performance, increase Effect of large adhesion area

Pending Publication Date: 2020-04-07
常州力普特轮胎翻新有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, it increases the cost of tire use and causes waste; on the other hand, it affects the operating efficiency of the vehicle, and in severe cases, there are potential safety hazards, which pose a threat to the safety of driving and pedestrians
Secondly, the heating temperature of the traditional process is 115-120 degrees Celsius. High temperature will cause secondary damage to the carcass rubber, and the high temperature will accelerate the aging of the carcass rubber and reduce the service life of the tire.

Method used

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  • Tire retreading method and retreaded tire
  • Tire retreading method and retreaded tire
  • Tire retreading method and retreaded tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (Embodiment 1, a kind of method for tire retreading)

[0054] See figure 1 , the present invention is a kind of tire retreading method, comprises the following steps:

[0055] (1) Initial inspection: By checking the crown, shoulder, sidewall, bead and inner tire of the tire, select a retreadable qualified carcass that meets the tire retreading standard, and clean the tire carcass;

[0056] (2), large grinding: use a fully automatic five-axis linkage grinding machine, set the grinding parameters, and perform grinding treatment, and the roughness of grinding is between RAM3~5;

[0057] (3) Upper and middle cushion rubber: put the tire in the middle cushion rubber extruder to inflate, use the principle of screw extrusion, heat and extrude the middle cushion rubber at a heating temperature of 80°C, and extrude the tire under high pressure At the discharge port of the machine, while rotating, the heated mid-pad rubber is bonded to the surface of the tire crown brushed with...

Embodiment 2

[0086] See Figure 2 to Figure 5 , a kind of tire, comprises tire body, and the part of described tire body contacting steel rim is edge, and the tread of tire body has pattern; The circumferential direction of described tire body has the joint of butt end; The section of described joint 1 is An inclined plane 2 parallel to the central axis of the tire body; the inclination angle of said inclined plane 2 is 30°.

[0087] There are evenly distributed grooves 3 on one end slope of the connector 1 , and protrusions 4 matching the grooves 3 are formed on the other end slope. The ends of the inclined planes of the joint 1 are all serrated and arranged in a staggered manner.

Embodiment 3

[0089] See Figure 2 to Figure 4 ,as well as Figure 6 to Figure 7 , a retreaded tire, comprising a tire body, the part of the tire body contacting the steel rim is an edge, the tread of the tire body has a pattern; the circumferential direction of the tire body has a joint 1 butted end to end, and the tire body is developed to be parallel quadrilateral.

[0090] The cross-section of the joint 1 is an inclined plane 2 . There are evenly distributed grooves 4 on one end slope of the connector 1 , and protrusions 3 matching the grooves 4 are formed on the other end slope.

[0091] The ends of the inclined planes 2 of the joint 1 are all in a zigzag shape 5 and arranged in a staggered manner.

[0092] The included angle between the slope 2 and the horizontal direction is 30-60°.

[0093] The acute angle of the parallelogram formed by the expansion of the tire body is 30-45°.

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Abstract

The invention relates to a tire retreading method. The method comprises the following steps of (1), primary inspection: selecting a retreadable qualified tire body meeting a tire retreading standard;(2), large polishing: carrying out polishing treatment by using a full-automatic five-shaft linkage polishing machine; (3), utilization of middle cushion rubber: placing the tire in a middle cushion rubber extruder for inflation, extruding the tire at a discharge port of the extruder under high pressure by utilizing a screw extrusion principle, and bonding the heated middle cushion rubber on the surface of a tire crown brushed with tread base rubber under high pressure while rotating; (4), tread fitting: pasting the prevulcanized tread rubber on the surface of the tire according to the corresponding size, and carrying out pressing after the joint is obliquely cut and butted; (5), utilization of envelopes: placing the formed retreaded tire into the flexible inner and outer envelopes, and then performing vacuumizing; and (6) vulcanizing: vulcanizing the tire with the surface tightly attached to the inner and outer envelopes. The butt joint adhesion area of the joint is enlarged through oblique cutting, and the tensile property is increased.

Description

technical field [0001] The invention relates to the field of tire production, in particular to a tire retreading method and a retreaded tire. Background technique [0002] The traditional tread rubber butt joint process is to directly cut the tread according to the length of the joint, and the joints are vertically jointed. Due to the direct cutting, the butt joint area of ​​the joint is small, and the tensile performance is poor; the tread itself has a certain stretch during the pasting process; especially for the tread with a small tread thickness, the reliability of its butt joint cannot be guaranteed. In the end, during the loading and use of tires, the joints often crack. Due to the repeated grip and friction of the tires on the car, the cracking is aggravated, and eventually delamination, and the tread falls off or falls off. At this point, the tires need to be unloaded for secondary processing. On the one hand, it increases the cost of tire use and causes waste; on...

Claims

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Application Information

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IPC IPC(8): B29D30/54
CPCB29D30/54B29D30/542B29D2030/541B29D2030/546B29D2030/545
Inventor 浦文伟崔亮
Owner 常州力普特轮胎翻新有限公司