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Preparation method of injection-molded polyurethane tire

A technology of polyurethane tires and polyurethane elastomers is applied in the field of preparation of injection polyurethane tires, which can solve the problems of tediousness and difficult positioning of bead rings, and achieve the effects of simplifying the preparation process, high uniformity of tire quality, and strong operability.

Pending Publication Date: 2018-12-14
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the process used is simplified and convenient compared to the traditional process, there are also problems such as difficult and cumbersome traveler positioning.

Method used

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  • Preparation method of injection-molded polyurethane tire
  • Preparation method of injection-molded polyurethane tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The mass ratio of tetrahydrofuran polyether diol to 1,4-phenylene diisocyanate is 100:40 to prepare a prepolymer, heat to 80°C, add 1% of the mass of the prepolymer to give the tire white color, and place in the mold The skeleton material is fixed in the tire mold by three-point positioning, the positioning deviation is 0.01mm, the electromagnetic force is adjusted to 1T, and a layer of 0.1mm thick polyvinyl alcohol release agent is sprayed on the inner wall. The skeleton material is composed of steel wire and laminated mesh. Weave the structure, start the injection machine to inject into the tire mold, fill the mold to maintain a pressure of 0.1MPa, keep warm at 80°C, release the mold after 5 minutes, cool and mold and demould to obtain the tire matrix; the fatty acid memory composite glue is used as the anti-puncture protective layer for precision Spray on the inner wall of the tire with a thickness of 1.7mm; apply 0.01mm thick trichloroisocyanuric acid on the surface ...

Embodiment 2

[0049] The mass ratio of polyadipate-1,4-butanediol to diphenylmethane-4,4-diisocyanate is 100:40 to prepare a prepolymer, heat to 150°C, and add 1% of the mass of the prepolymer The red pigment gives the tire a red color, and the frame material is fixed in the tire mold by two-point positioning in the mold. The positioning deviation is 0.05mm, the electromagnetic force is adjusted to 0.1T, and a layer of 0.5mm thick paraffin release agent is sprayed on the inner wall. The frame material Adopt a single-layer mesh cylinder structure, start the injection machine to inject into the tire mold, fill the mold to maintain a pressure of 30MPa, keep warm at 170°C, release the mold after 10 minutes, cool down, mold and demould to obtain the tire matrix; compound a layer of polyvinyl alcohol gas inside the tire Barrier film with a thickness of 1.8mm; on the surface of the tire base pattern, apply a 0.05mm thick solution of trichloroisocyanuric acid with methyl ethyl ketone as a solvent fo...

Embodiment 3

[0051] The caprolactone-modified polyrotaxane and hydrogenated xylylene diisocyanate are prepared into a prepolymer at a mass ratio of 100:48, heated to 120°C, and 1% of the weight of the prepolymer is added to give the tire a yellow color. In the mold, the skeleton material is fixed in the tire mold by surface matching positioning method, the positioning deviation is 0.04mm, the permanent magnetic force is 0.4T, and a layer of 0.02mm thick silicone oil release agent is sprayed on the inner wall. The skeleton material adopts a single-layer mesh cylinder structure. Start the injection machine to inject into the tire mold, fill the mold to maintain a pressure of 0.3MPa, keep warm at 120°C, release the mold after 60 minutes, and spray the fatty acid memory composite glue on the inner wall of the tire as an anti-puncture protective layer, with a thickness of 1.5mm , place the injected tire matrix in a 120°C oven for post-treatment for 1 hour, cool and solidify, mold and demould to ...

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PUM

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Abstract

The invention discloses a preparation method of an injection-molded polyurethane tire. The method comprises specific steps as follows: a release agent is uniformly applied to the inside of a mold, themold is preheated, a steel wire ring in a framework material is fixed by a magnetic element in the mold, and internal positioning of the framework material is completed. A magnetic substance is addedto the framework material and forms tension with the magnetic element in the mold, and setting positioning of the framework material is completed. A rubber elastomer is injected into the tire mold after being heated, the mold is taken out after the mold is full and kept at the constant pressure and the constant temperature for a certain time, a lining layer of a prepared tire base body is coatedwith a thermoplastic film or anti-pricking coating, and the polyurethane tire is obtained. After the tire is worn during use, the surface of the tire can be coated with a white carbon black combined elastomer material, and repairing is completed. The process is simple, the polyurethane tire is good in wear resistance and oil-saving, the surface coated layer can be repaired instantly, the purpose of long service life of the tire is achieved, resources are saved, and the environment is protected.

Description

technical field [0001] The invention relates to a preparation method of injected polyurethane tires, which is mainly used in the preparation of polyurethane tires. Background technique [0002] Polyurethane elastomers have been used as a raw material for tire manufacturing for decades. According to the structure, polyurethane tires are mainly divided into full polyurethane elastomer tires and polyurethane elastomer tread / rubber carcass composite tires (polyurethane rubber composite tires). There are also differences in the problems to be solved by these two structural tires. [0003] The properties of polyurethane vary widely and can be plastic, rubber (elastomer) or fiber, and it can also be used to make artificial leather. Five types of elastomers can be synthesized from oligomer polyols, polyisocyanates and chain extenders, including casting type, thermoplastic type, mixing type, reaction injection type and solution dispersion type, among which the most important ones ar...

Claims

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Application Information

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IPC IPC(8): B29D30/32B29D30/08
CPCB29D30/08B29D30/32B29D2030/3207
Inventor 王益庆沈家锋张立群
Owner BEIJING UNIV OF CHEM TECH