Shanghai Daoqin Plastics Co., Ltd.

        首先, 我们先 understanding lower, material 花 定义: also material 花, water 花, is generate injection molding made parts surface similar water 泡破裂状 线 strip/profile, more 呈剪头状, 剪头指 toward 胶口.

图 1银纹典 type defect sheet/slice

图 2 银纹典 type defect sheet/slice

        1. equipment 方面

         nozzle small, material material in nozzle 处流涎 or wire drawing, machine or nozzle has material, high speed material 流经 时 generate scratch hot make material separation understanding;

         material 筒, screw abrasion loss or 胶头, 胶圈存 in material 流死角, long hot separation understanding;

         add hot system 失控, formed temperature degree high separation understanding, 应检查 hot electrical 偶, hot and other add hot parts is has issues. screw design 不当, formed separation understanding or easy belt/tape gas.

        2. mold 方面

         due to design upper defect, 如: gate 位置不佳, gate small, more gate made parts gate 排布不 for 称, runner fine small, mold cooling system combined make mold temperature 差异太 large and other formed material in mold cavity inner flow 不连续, 堵塞 空 gas 通道.

        转角位 于尖锐, material 流经 时剪切 large formed 银纹出现;

         mold separation type less necessary gas or gas 孔道不足, 堵塞, 位置不佳, also has parts, 顶针之 type processing 缝隙排 gas, molding in gas can in plastics 进入时 meanwhile 离.

         mold surface coarse degree 差, scratch retardant force large, formed local hot 点, make through plastics separation understanding.

         mold 漏油, water, gas mold type easy formed made parts table/sheet 明银纹.

        3. process 方面

         material temperature high, formed separation understanding. machine temperature degree high or add hot 失调, 应逐段 decrease low machine temperature degree. add material temperature degree high, make separation plastics melt 充满螺槽, gas method from add material 口排出.

         injection speed degree fast, make melt plastics large function separation understanding, generate separation understanding gas; injection speed degree slow, can and 时充满 type formed products surface density generate 银纹.

         material amount 不足, add material 缓冲垫 large, material temperature low or mold temperature low effect/influence material flow and molding pressure, generate bubbles.

         screw 预塑时 back pressure low, speed high, make screw 退回太 fast, gas easy material 一起推 toward machine front 端.

        4. raw materials 方面

         raw materials in mixed material or material in a large amount of powder 尘, melt easy belt/tape gas, has 时会出现银纹. raw materials 受污染 or powder more raw materials easy hot separation understanding.

         water material (recycled material)添 add more, water material recycled more or and new material ratio/proportion high (generally small 于20%).

        材 material in additives separation understanding formed 银纹.

        材 material in water separation more can separation drying, formed made parts 银纹.

        材 material moisture content high or material has 蜂孔, formed made parts 银纹.

        1. material material is 否受潮

        排查材 material has obvious water phenomenon, can through 目视观察 outer packaging has water phenomenon, material bag use 手感触材 material has wet phenomenon, has water 受潮 材 material very difficult dry;

        2. add material step/link

        排查 add material step/link, ensure material and add material process dry 净避免异 material mixed 入, 查看材 material pellets has obvious 蜂孔;

        3.烘 dry equipment 排查

        排查烘 dry equipment, 查看烘 dry equipment add hot temperature degree is positive 常(material 筒底部 has temperature degree table/sheet), 鼓风进出时否顺畅, can use 手感触出风口 is has obvious 出风感觉;

图 3 is material 筒进风口实际 temperature degree need and setting temperature degree versus 符

图 4 is 出风口 need 出风顺畅

        4.射胶 block is has foaming phenomenon?

        退出射台射胶看胶 block has foaming phenomenon, positive production material has foaming phenomenon, has foaming is has gas 体, need 继续烘 dry or reduce material temperature degree;

图 5胶 block bubbles obvious, material hot separation understanding or dry

图 6胶 block light slip lubricating dry good

        5. 检查射嘴 electrical hot and material 筒

        检查射嘴 electrical hot and material add hot is positive 常, 射嘴处 can use material strip/profile in upper 面划试, material strip/profile 熔化则 positive 常, material strip/profile reaction temperature degree positive 常; material temperature degree can temperature degree 画面, can ratio setting value ultra- 20 degree;

        6. injection molding process

        检查 injection molding process in effect/influence key/critical conditions, 松退位置尽 can can decrease small, back pressure can add large, speed degree rise high and reduce di toward 验证;

        7. mold issues 检查

        排查 mold has 无漏油, gas, water effect/influence;