He repeated the old price of nylon, processing characteristics, thinking: Why can I not play to

their strengths, develop nylon valve? If successfully developed, I will not speak aside, the price of materials, processing of copper

valves just need a set of hot forging, surface treatment, car assembly lines and other internal and external thread and can be omitted Yi

Gai, processing costs alone account for about the cost of copper valves two percent.
    Development of nylon valve,

the first step is the development of nylon valve molds, a nylon valves, mainly by the body, stem, the ball valve, seals and other components composed of so many components to an injection molding in the cavity? How to set

ejection bodies torn polyhedral body? How to control the injection temperature segment? How to make the interaction between components to

meet the design requirements? How old constantly thinking, constantly testing, constantly recording the test parameters, full of mind are ,

product shrinkage, and then failed test, test and then failed, scrapped a mold and a