Shanghai Daoqin Plastics Co., Ltd.

         injection molding production 时, is 否也常常 has to fiber exposure issues, 露纤就 is glass fiber in product surface, comparison coarse 糙, appearance upper comparison difficult 以接受, generate can can causes analysis: in add this category of filling material 时候, generally is using/adopting material mixed combined methods, therefore is glass fiber (GF) uniform dispersion in plastics in 间, in plastics melt rear, this mixed combined material 会出现 different degree separation 离(视添 add ratio/proportion and glass fiber (GF) long short 而定, also has raw materials temperature degree has 一定程 degree effect/influence)

         that glass fiber (GF) is what outer 露呢?

         in 射胶 时候, material flow different liquid flow methods (liquid is flow, plastics is non flow), has types method comparison has 意思也 comparison easy 懂. large 家应该看 河流里面, in 河流里 has 一 树枝 and other material, 经常会 in 沿岸边 has this category of 依附河岸而停留. is in 河岸边 water speed is retardant force slow, this and 充填时 table/sheet has similar. therefore this in injection molding in, is glass fiber (GF) outer 露, is fiber exposure.

         this is is glass fiber (GF) versus for/regarding plastics flow need very more, plastics in mold in flow is 喷泉式 flow (喷泉效应), from in 间往两边翻动 methods flow, therefore flow property most good is to most front 面, flow property good 就会停留 in mold surface (做PP and other raw materials combined and most rear color different 也同此理, is in most front generally is wax 质, and color powder separation especially is add masterbatch most obvious, is masterbatch generally is use PE做载体), also has anti material mold surface anti agent is this causes.

         generally using/adopting lower methods can reduce fiber exposure ratio/proportion:

        1. increase speed degree

         in increase speed degree rear, glass fiber (GF) and plastics although in speed different, versus for/regarding high speed 射胶而言, this versus for speed degree ratio/proportion small, 就像河流 in 激流 段永远不会 has 树枝留 lower 一样 道理.

        2. rise high mold temperature degree

         this function is most large, increase high mold temperature degree, is is decrease/reduce glass fiber (GF) and mold retardant force, let glass fiber (GF) and plastics speed degree amount small. and let plastics flow in melt amount thick, let table/sheet 皮层尽 amount thin, this good light slip 河岸无 method 留住树枝一样 道理. RHCM就 is utilizing this principle to appearance fiber exposure.

        3. reduce screw amount temperature degree, decrease/reduce solvent amount

         this is let plastics box/case glass fiber (GF) separation can can property amount reduce, generally for/regarding fiber exposure effect/influence most small, in 实际操 as in 效果不 large. is, this can very good solution 烧焦. this is is increase glass fiber (GF) rear, glass fiber (GF) versus for/regarding plastics need large very more, therefore very easy 堵住排 gas 通道, therefore in most rear very difficult gas, and glass fiber (GF) in high pressure high oxygen gas ring in is very easy 燃烧!