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Method for preparing rounded pre-vulcanized tyre surface of giant-scale tyre for mining by screw-type pushing-in process

A pre-vulcanized tire and screw-type technology is applied in the field of remanufacturing pre-vulcanized treads for mining giant tires. The effect of improving the performance and densification of the rubber

Active Publication Date: 2015-03-25
QINGDAO TIANDUN RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The retreading and remanufacturing of giant mining tires is a difficult problem in the world. Using the traditional hot retreading process, the tread pressure is low, not wear-resistant, and easy to fall off; using the cold retreading process, the strip-shaped pre-vulcanized tread has more than three joints, and the tread is pasted It cannot be pre-stretched when the tire is used, and the tread is thicker (above 100mm), and the tread will fall off quickly when the tire is used; while the annular tread is used, due to the large size of the giant tire, the circumference of the tread exceeds 10m, and the traditional manufacturing method It is to extrude semi-finished rubber strips around the mold, and apply pressure through the mold clamping process. Obviously, it is not feasible to produce giant tire treads in this way.
Therefore, there is no successful precedent for retreading and remanufacturing of giant tires at home and abroad.

Method used

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  • Method for preparing rounded pre-vulcanized tyre surface of giant-scale tyre for mining by screw-type pushing-in process
  • Method for preparing rounded pre-vulcanized tyre surface of giant-scale tyre for mining by screw-type pushing-in process
  • Method for preparing rounded pre-vulcanized tyre surface of giant-scale tyre for mining by screw-type pushing-in process

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Experimental program
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Effect test

Embodiment 1

[0027] Firstly, a full circle pre-vulcanized tread mold is designed according to the size of the giant tire. The mold includes an upper outer mold 6, a lower outer mold 8 and an inner mold 7. The upper outer mold 6 and the lower outer mold 8 are fixed and locked with bolts. The mold 7 is fixed by engaging and locking with the upper outer mold 6 and the lower outer mold 8, and forms a closed tread inner cavity after being combined, that is, the mold cavity 5, and the upper outer mold 6 is provided with 2 glue inlets; The mouthpiece of the feed screw extruder 3 is closely connected and locked with the mold inlet 1 and the glue inlet 4, and the pressure sensor is installed on the glue inlet 1 and the glue inlet 4 and the cold feed screw extruder 3 The control system is connected; at the same time, start the cold-feed screw extruder 3 and continue to enter the tread rubber through the feeding port 2 of the cold-feed screw extruder, and continue to push the rubber into the Mold, se...

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Abstract

The invention relates to a method for preparing a rounded pre-vulcanized tyre surface of a giant-scale tyre for mining by a screw-type pushing-in process. The method realizes refurbishment and re-manufacture of the existing giant-scale tyre for mining. The method comprises the following steps of pushing rubber into a mold from a rubber inlet of the mold by a cold feeding screw extruder to fill the mold with the rubber under the action of continuous spiral thrust, and applying higher pressure for the rubber by pulse so that the rubber is compact and the vulcanized tyre surface physico-mechanical properties and wear resistance are improved.

Description

technical field [0001] The invention relates to a manufacturing method for remanufacturing a precured tread of a giant mine tire. Background technique [0002] When the tire is in use, the life of the carcass is longer than that of the tread. In order to improve the utilization rate of tires, a tire retreading and remanufacturing industry has been formed. At present, the commonly used tire retreading and remanufacturing method is the pre-vulcanized tread-wrapping sleeve process, which is to coat the polished retreaded tire carcass with glue, and then attach the pre-vulcanized tread with pattern to the old carcass , and then the formed retreaded tire blank is put into the vulcanization tank under the condition of envelope pressure for low-temperature vulcanization. The pre-vulcanized tread used in this cold-turning method is divided into strip tread and annular tread. The annular tread has no joints, and the balance performance of the tire is good. Compared with the strip t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/54B29C33/00
Inventor 刘曾凡刘洋姚雪张俊杰魏爱龙刘光烨
Owner QINGDAO TIANDUN RUBBER
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