Shanghai Daoqin Plastics Co., Ltd.

         blow molding machine production process in generate material is non 常麻烦 is parts 事情, this material 会不经意间出现 in 接头颈, in internal, 以至于我们 product 也会偶发 property upper 黑斑, black spots, 黑线, how to has 效避开 this 麻烦事?

        一, scorching/burn marks

        1, scorching/burn marks phenomenon

        (1) temperature degree ultra-high, or is control temperature degree table/sheet 失灵, formed plastics ultra-high temperature scorching/burn marks.

        (2) machine 头 出胶口烟雾 large, has strong/high 烈 刺激 odor, another also has 噼啪声.

        (3) plastics surface pellets scorching/burn marks material.

        (4) combined 胶缝处 has gas 孔.

        2, generate scorching/burn marks causes

        (1) temperature degree control ultra-high formed plastics scorching/burn marks.

        (2) screw long use has 清洗, scorching/burn marks material 积存, plastics extrusion.

        (3) add temperature time long, plastics material long add temperature, make plastics aging 变质而 scorching/burn marks.

        (4)停车 time long, has machine and screw, formed plastics separation understanding scorching/burn marks.

        (5) more 次换模 or color, formed plastics separation understanding scorching/burn marks.

        (6) machine pressure cover/cap has pressure 紧, plastics in aging separation understanding.

        (7) control temperature degree table/sheet 失灵, formed ultra-high temperature rear scorching/burn marks.

        3, troubleshooting scorching/burn marks methods

        (1)经常 检查 add temperature system is positive 常.

        (2)定期 清洗 screw or machine 头, need 彻底清洗 dry 净.

        (3)按 process requirements add temperature, add temperature time long, if add temperature system has issues need and has 关人员 solution.

        (4)换模 or color need and 时, dry 净, anti color or scorching/burn marks.

        (5) adjustment good mold rear need sleeve/set pressure cover/cap pressure 紧, anti 止进胶.

        (6)发现 scorching/burn marks 应立即清理 machine and screw.

        二, defect

        1, defect phenomenon

        (1) plastics surface has 蛤蟆皮式 phenomenon.

        (2) temperature degree control relatively low, table/sheet 指针反映 temperature degree low, 实际测 amount temperature degree low.

        (3) plastics surface 发乌, has micro small cracks or has good small pellets.

        (4) plastics combined combined good, has strip/profile obvious 痕迹.

        2, defect generate causes

        (1) temperature degree control low or control combined 适.

        (2) plastics in has difficult resin pellets.

        (3)操 as methods 不当, screw and speed degree fast, plastics has full to 塑化.

        (4) pelletizing plastics mixed combined non-uniform or plastics 本身存 in quality issues.