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Material for substituting hydraulic oil in use for isostatic pressing die, and preparation method

A technology of hydraulic oil and isostatic pressure, which is applied in the application field of static pressure molds, can solve the problems of difficulty in metal processing of hydraulic mold structures and heavy workload, high total cost of after-sales service costs, easy leakage of hydraulic systems, etc., to achieve Reduced after-sales service costs, good physical and mechanical properties, difficulty in metal processing and reduced workload

Inactive Publication Date: 2007-07-25
袁军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a liquid hydraulic oil has the characteristics of flow and penetration, the hydraulic system has inherent defects of easy leakage and product contamination; hydraulic oil is an organic solvent, during the use of the mold, It must have a certain erosive effect on the surface glue composed of organic materials, thus causing unavoidable failures such as degumming, bubbling, and glue penetration during use; due to the difficulty of metal processing and the large workload of the hydraulic mold structure , the indispensable accessories and additional process materials also constitute additional costs. Therefore, the hydraulic isostatic pressing mold must have the disadvantages of high total cost of manufacture and high after-sales service costs; meanwhile, its complicated structure makes mold refurbishment difficult. difficulty

Method used

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  • Material for substituting hydraulic oil in use for isostatic pressing die, and preparation method

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Embodiment 1

[0020] As shown in Figures 1 and 2, the present invention provides a substitute material for hydraulic oil for isostatic dies, using a quasi-liquid polyurethane elastomer material 1 with a hardness of Shore A0-A20 to replace the hydraulic oil. The quasi-liquid polyurethane elastic The body material is composed of oligomer polyol A containing hydroxyl group, organic substance B containing isocyanate group, plasticizer C, the equivalent ratio of components A and B is 0.6-1.5, and component A is polyoxypropylene polyol , polymer grafted polyether polyol, polyethylene oxide polyol, adipate polyester diol, aromatic polyester diol, dimer polyester diol, polycaprolactone polyol, polypropylene One or more of ester polyols, polyolefin polyols, vegetable oil polyols, component B is toluene diisocyanate, diphenylmethane diisocyanate, polymethylene polyphenyl isocyanate, carbodiimide Modified liquefied, dicyclohexylmethane diisocyanate, one or more of the isocyanate semi-prepolymers synth...

Embodiment 2

[0025] A production method of a substitute material for hydraulic oil for an isostatic mold of the present invention is as follows: firstly, sandblasting the processed metal mold substrate, cleaning and degreasing, and then brushing the adhesive, and then pre-painting it Heat to 80°C for later use.

[0026] Then, prepare the quasi-liquid polyurethane elastomer material 1: take 1000 parts of mixed polyether polyols with a hydroxyl value of 60, 220 parts of liquefied MDI modified by carbodiimide, 10 parts of stannous octoate, dimethyl phthalate 300 parts of oxyethyl ester, fully stirred and mixed at a temperature of 40-80°C, defoamed for 10 minutes, poured into the glue-holding space of the aforementioned spare mold, and should be filled, wait until it is semi-solidified, and then pour the surface glue , and then 80 ~ 120 ° C vulcanization molding, and then post-treatment temperature is 85 ~ 90 ° C, the delay is 11 ~ 16h as a parameter for post-treatment.

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Abstract

This invention discloses a method for preparing a replacing material of hydraulic oil for isostatic-pressing molds. The replacing material is prepared from quasi-liquid polyurethane elastomer material with Shore hardness of A0-A20 by two-time casting and one-time molding. This invention avoids product contamination and surface rubber corrosion caused by hydraulic system leakage. Therefore, isostatic-pressing molds, especially ceramic isostatic-pressing molds, have lowered processing difficulty, labor intensity.

Description

technical field [0001] The invention relates to a quasi-liquid polyurethane elastomer material and the application of the material as a substitute material for hydraulic oil in isostatic pressing molds, especially ceramic tile isostatic pressing molds. Background technique [0002] At present, the isostatic molds on the market, especially the isostatic molds for ceramic tiles, are all hydraulic molds. For example, the structure of a ceramic tile hydraulic mold includes a base body, a surface glue, and several oil-holding cavities. They are connected to each other, and the matrix must also be provided with oil injection holes and air release holes. The oil injection holes must be equipped with oil injection nozzles (or oil injection check valves). When the mold is filled with oil, the air release holes must be plugged. Add oil-separating rubber plugs, the interior of the mold (the entire space in each oil cavity and all oil passages) must be filled with hydraulic oil, and no ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08G18/76C10M107/44C10N50/08
CPCB30B11/001B28B3/003
Inventor 袁军
Owner 袁军
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