Preparation method of casting polyurethane tire

A polyurethane tire and polyurethane elastomer technology, applied in tires, other household appliances, household appliances, etc., can solve the problem of difficult positioning of the bead ring, achieve convenient positioning, realize automation, and reduce production costs.

Inactive Publication Date: 2018-11-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, in the molding process such as pouring and injection pressure, it is

Method used

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  • Preparation method of casting polyurethane tire

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Experimental program
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Effect test

Embodiment 1

[0051] The polyadipate-1,4-butanediol and toluene diisocyanate mass ratio is 100:40 to prepare prepolymer, heat to 80℃, add 1% white pigment of prepolymer mass to give the tire white, inside the mold The frame material is fixed in the tire mold by three-point positioning, the positioning deviation is 0.01mm, the electromagnetic force is adjusted to 1.1T, the inner wall is sprayed with a layer of 0.01mm thick polyvinyl alcohol release agent, the frame material is composed of steel wire, and laminated The mesh structure is woven, and the casting machine is started to pour into the tire mold. The mold is filled to maintain a pressure of 0.1MPa, and the temperature is 80°C. After 8 minutes, the mold is ejected. The tire matrix is ​​obtained by cooling and molding. The layer is precisely sprayed on the inner wall of the tire with a thickness of 1.7mm; the surface of the tire matrix pattern is coated with 0.01mm thick trichloroisocyanuric acid and ethyl acetate is used as a solvent fo...

Embodiment 2

[0053] The mass ratio of tetrahydrofuran polyether glycol and 1,4-phenylene diisocyanate is 100:30 to prepare a prepolymer, and it is heated to 180°C, and 1% of the mass of the prepolymer is added to give the tire a red color. The frame material is fixed in the tire mold by a two-point positioning method, the positioning deviation is 0.05mm, the electromagnetic force is adjusted to 0.1T, the inner wall is sprayed with a layer of 0.5mm thick paraffin release agent, the frame material is a single-layer net cylinder structure, and the casting starts The machine is poured into the tire mold, the mold is filled to maintain the pressure 22MPa, the temperature is 170°C, and the mold is ejected after 10 minutes. The tire matrix is ​​obtained by cooling and molding. A layer of polyvinyl alcohol gas barrier film is compounded inside the tire with a thickness of 1.5mm; The surface of the tire base pattern is coated with a 0.03mm-thick solution of trichloroisocyanuric acid in methyl ethyl k...

Embodiment 3

[0055] The caprolactone-modified polyrotaxane and hydrogenated xylylene diisocyanate were prepared into a prepolymer with a mass ratio of 100:48, heated to 120°C, and 1% yellow pigment of the prepolymer mass was added to give the tire yellow. In the mold, the frame material is fixed in the tire mold by surface matching positioning method, the positioning deviation is 0.04mm, the permanent magnet is 0.4T, the inner wall is sprayed with a layer of 0.02mm thick silicone oil release agent, and the frame material uses a single-layer net cylinder structure. Start the pouring machine to pour into the tire mold, fill the mold with a pressure of 0.3MPa, keep the temperature at 120°C, and release the mold after 30 minutes. The fatty acid memory composite rubber is used as a puncture-resistant protective layer to be precisely sprayed on the inner wall of the tire with a thickness of 1.2mm , Place the casted tire matrix in a drying tunnel at 120°C for 0.5h post-treatment, then cool and soli...

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Abstract

The invention discloses a preparation method of a casting polyurethane tire. The preparation method of the casting polyurethane tire comprises the specific steps that a release agent is evenly spreadinside a mold, the mold is preheated, a traveler in a framework material is fixed by a magnetic element in the mold, and internal locating of the framework material is achieved; the framework materialand the magnetic element of the mold form tension to complete shaping and locating of the framework material; a rubber elastomer is heated and poured into the tire mold, after the mold is filled andkeeps the temperature and pressure, a tire matrix is taken out of the mold, a lining layer of the prepared tire matrix is coated with a thermoplastic film or a anti-puncturing coating, and then the polyurethane tire is obtained. After the tire is worn during use, the surface of the tire is coated with a composite white carbon blank elastomer material to complete repair. According to the preparation method of the casting polyurethane tire, the technology is simple, a tire preparation technology is simplified through a magnetic locating technology, the tire is prepared in a casting formation manner, the operability is high, and industrialization is easy to achieved; and the obtained polyurethane tire is good in wear resistance and saves oil, the surface coating can be repaired in real time,the purpose that the tire is long in service life is achieved, resources are saved, and environmental protection is achieved.

Description

Technical field [0001] The invention relates to a method for preparing cast polyurethane tires, which is mainly used for preparing polyurethane tires. Background technique [0002] Polyurethane cast tires are a new type of tires that came into being with the emergence and development of polyurethane materials. They are made by liquid polyurethane pouring or pouring into tire molds for curing reaction. Polyurethane elastomer has a history of decades as a raw material for the manufacture of tires. 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). The problems that these two structural tires need to solve are also different. [0003] Casting polyurethane prepolymer (CPUE), as the name implies, "casting type" refers to a chemical processing method in which the material system of the product is liquid before molding, which can be ...

Claims

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Application Information

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IPC IPC(8): B29D30/04B29C39/10B29C39/22C08G18/32C08G18/40C08G18/42C08G18/44C08G18/48
Inventor 王益庆沈家锋张立群
Owner BEIJING UNIV OF CHEM TECH
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