Shanghai Daoqin Plastics Co., Ltd.

        一, modified process process/workflow

         modified plastics main/primary production equipment is di screw extrusion machine,

         Common production process process/workflow is: material mixed material extrusion 一k拉 strip/profile cooling pellet cutting packaging.

         modified plastics product quality issues main/primary can separation is appearance defect and property can combined 格, in this discussion is appearance defect. appearance defect large more and production process, Raw Materials 质嚣, production equipment, production ring and other factors has 关. Common defect has long strip/profile, 连粒, black spots, color, true defect, iron 屑, defect, carbon and other. from production process 入手, for modified plastics Common quality issues analysis 并提出 countermeasures.

        二, Common defect

        1. long strip/profile

         large positive pellets 2倍 long degree is long strip/profile.

         generate causes main/primary has machine strip/profile or strip/profile, material strip/profile direction is 直线, pellet cutting machine tool abrasion loss or has and other.

         main/primary solution measures:

        1) positive production adjustment material strip/profile pellet cutting machine direction and adjustment water long degree;

        2) production strip/profile 严罩需调褴 process 处理;

        3) attention/notes pellet cutting machine 动刀 检杏, and more loss bad 动刀;

        4) for/regarding long strip/profile using/adopting combined 适 振动筛, 筛处理.

        2.连粒

        两 or more pellets 并排连 in 一起称 is 连粒.

        产牛 causes main/primary has strip/profile strip/profile, water long degree and other.

         main/primary solution measures:

        1) extrusion strip/profile selection wide degree combined 适 导 strip/profile 轮, separation in material strip/profile;

        2) adjustment combined cooling water long degree, decrease/reduce 连粒;

        3) for/regarding 出现 连粒 can using/adopting combined 适 振动筛 筛.

        3. black spots

         in pellets surface or 里面存 in black pellets.

        引起 black spots main/primary causes has: machine dry 净; raw materials in has black spots; screw carbon 化: ring 境污染.

         main/primary solution measures:

        1)转产清 machine process in, has dry 净, heavy new machine can;

        2) add strong/high material 检验, especially filling powder or flame retardant in relatively easy black spots, phenomenon;

        3) attention/notes control adjustment temperature degree and material material in inner time, anti processing temperature degree high;

        4) attention/notes ring 境卫生, good production different color product machine between 隔离, anti is necessary.

        4.变 color

         performance is production process in product color 突然发生变化, obvious Color Difference.

         generate color main/primary causes has mixed material 不均;清 machine dry 净; temperature degree high;剪切太 strong/high.

         main/primary solution measures:

        1)严格 according to mixed material process, ensure mixed material uniform property;

        2)清 machine formed rear year 人检杳, ensure machine f净;

        3) control extrusion temperature degree, anti temperature degree high color powder separation understanding;

        4) selection combined screw combined, 避免太 strong/high 剪切.