Method for renewing tyre by using pre-sulfurized annular tyre surface

A tread retreading and pre-vulcanization technology, which is applied in tires, applications, household appliances, etc., can solve the problems of complex control systems and methods, long vulcanization time, and low production efficiency, so as to shorten the retreading process time, simplify the vulcanization process, The effect of saving resources

Inactive Publication Date: 2012-05-30
MESNAC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But generally speaking, the multi-temperature control vulcanization technology will lead to overly complicated control systems and methods, large equipment investment, and long vulcanization time, resulting in low production efficiency.

Method used

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  • Method for renewing tyre by using pre-sulfurized annular tyre surface
  • Method for renewing tyre by using pre-sulfurized annular tyre surface
  • Method for renewing tyre by using pre-sulfurized annular tyre surface

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Experimental program
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Effect test

Embodiment 1

[0059] In Embodiment 1, the method for retreading a tire with a precured annular tread includes the following steps:

[0060] Adopt pre-vulcanization process to make continuous annular tread;

[0061] For tires that need to be retreaded, sand the crown of the carcass;

[0062] The back side of the ring tread is polished to the same roughness RMA as the tire crown of the carcass, and the RMA is between 3 and 4;

[0063] Coat the normal temperature vulcanizing agent evenly on the surface of the carcass crown;

[0064] Use a radial expansion device to coaxially wrap the annular tread on the outer circumference of the tire;

[0065] At an ambient temperature of 40±5℃, apply 8-11kg / cm between the annular tread and the carcass. 2 After 45-75 minutes of pressure, the annular tread and the carcass are vulcanized to form an integral structure.

[0066] Such as figure 1 As shown, the method steps of pre-vulcanizing toroidal tread are as follows,

[0067] Rubber mixing process, mixing the raw materia...

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Abstract

The invention relates to a method for renewing a tyre by using a pre-sulfurized annular tyre surface. According to the invention, a pre-sulfurized annular tyre surface and a tyre body with a same cured rubber physical property are subject to direct adhesion and a sulfurization treatments under a normal temperature (far lower than 115-125 DEG C) and a pressurized condition. With a normal-temperature sulfurization technology, the tyre renewing quality is ensured, and the tyre body is prevented from being damaged by high temperature. First, the annular tyre surface is manufactured with a pre-sulfurization technology; a crown part of the tyre body is scoured, such that the back side of the annular tyre surface is provided with a same roughness RMA with the crown part of the tyre body; a normal-temperature sulfurization agent is uniformly coated on the surface of the crown part of the tyre body; the annular tyre surface is coaxially sleeved on the peripheral of the tyre body by using a radial expansion apparatus; under an environmental temperature of 35-45 DEG C, a pressure of 8-11kg/cm<2> is applied between the annular tyre surface and the tyre body for 45-75min, such that the annular tyre surface and the tyre body are sulfurized and form an integral structure.

Description

Technical field [0001] The invention provides a new type of tire retreading method, in particular, a pre-vulcanized annular tread is pasted on the outer circumference of the tire casing through a special vulcanizing agent under normal temperature and pressure conditions, and belongs to the field of rubber machinery and retreading processing. Background technique [0002] Due to the widespread use of vehicles such as automobiles and airplanes, a large number of scrap tires need to be disposed of every year. In order to save the relatively limited natural rubber resources and reduce the pollution caused to the environment, the old tires with worn tread patterns are generally retreaded and put into recycling again. [0003] The existing tire retreading technology mainly uses a grinding machine to polish the tread of the old tire, and then apply the cushion rubber to the surface of the carcass, and then the new tread is joined together on the carcass. The composite parts are formed by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/56
CPCB29D30/56
Inventor 袁仲雪高彦臣王金健
Owner MESNAC
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