Shanghai Daoqin Plastics Co., Ltd.

mold design must has design and injection molding experience,必 must this effect/influence factors and injection molding conditions and its table/sheet factors,如 injection molding pressure and mold cavity pressure and speed degree, injection melt temperature degree and mold temperature degree, mold structure and gate and distribution,以 and gate 截面积, products thick, plastics material in reinforcement filler content, plastics material crystallization degree and orientation property and other factors effect/influence. upper factors effect/influence plastics material different, or its it molding conditions temperature degree, wet degree, crystallization 化, molding rear injection molding machine 变化而 different.
 
    in effect/influence precision injection molding related factors in, mold is obtain combined quality requirements precision plastics products key/critical. mold design, mold design is combined 理会直接 effect/influence plastics products quality. due to mold type dimensions is plastics products requirements dimensions add upper use material shrinkage rate,而 shrinkage rate is plastics production or engineering plastics manual/handbook recommendation scope/range inner value, it not only and mold gate 形式, gate and distribution has 关, but also and engineering plastics crystallization orientation property (各 toward property), plastics products 形状, dimensions to gate and has 关. effect/influence plastics shrinkage rate main/primary factors hot shrinkage, versus shrinkage, orientation shrinkage, pressure shrink shrinkage and elastic property and other,而 this effect/influence factors and precision injection molding products molding conditions or as conditions has 关.
 
    due to injection molding process is plastics from solid 态(powder material or material) toward liquid 态(melt) also toward solid 态(products)转变 process. from material to melt, again melt to products, in need temperature degree 场, 流场以 and density and other function. in this 场 共同 function lower, different plastics (hot solid property or thermoplastic property, crystallization property or non crystallization property, reinforcement type or non reinforcement type and other) tool has different polymer structure and property can. is effect/influence to upper 述“场” factors will effect/influence to plastics products material force property can, dimensions, 形状, degree and appearance quality.
 
    this 样, process factors and polymer property can, structure and plastics products between inner in 联系会 through plastics products performance 出. analysis this inner in 联系, for combined 理 拟定 injection molding processing process, combined design 并按图纸 manufacturing mold, combined selection injection molding processing equipment has important 意义. precision injection molding and injection molding in injection molding pressure and injection speed rate upper has difference, precision injection molding using/adopting high pressure or ultra-high pressure injection, high speed injection obtain relatively small molding shrinkage.