Shanghai Daoqin Plastics Co., Ltd.

         in extrusion blow molding product molding process in, 总会遇 to very more technology upper issues, lower and large 家一起 separation generate this issues causes and versus for/regarding solution measures, can is large provide solution issues related 建议.

        一, blow molding product toward thick non-uniform:

         generate causes:

        ① type heavy lower phenomenon heavy

        ② blow molding products toward 两 横截面直径 versus large

         solution measures:

        ① reduce type melt temperature degree, improve/increase type extrusion speed degree, more use melt flow speed degree relatively low resin, adjustment type control plant/unit

        ②适当改变 products design, using/adopting method molding

        二, blow molding product toward thick non-uniform:

         generate causes:

        ① type extrusion 歪斜

        ②模 sleeve/set and inner outer temperature relatively large

        ③ products outer for 称

        ④ type 坯吹胀 ratio large

         solution measures:

        ① adjustment 口模间隙 wide degree 偏差, make type thick uniform;闭模 front,拉直 type bad

        ②提髙 or reduce sleeve/set add hot temperature degree, improvement inner outer temperature degree 偏差

        ③闭模 front, for type 坯进行预夹紧 and expand 张, make type 坯适当 toward thin direction 偏移

        ④ reduce type 坯吹胀 ratio

        三, blow molding product surface orange peel 状花纹 or 麻点:

         generate causes:

        ① mold gas defect

        ② mold water or mold type 腔出现 cold phenomenon

        ③ type 坯塑化 defect, type generate melt phenomenon ④吹胀 gas pressure 不足

        ⑤吹胀 speed degree slow

        ⑥吹胀 ratio small

         solution measures:

        ① mold type 坯进行喷砂处理, increase gas 孔

        ②修理 mold, adjustment mold cooling temperature degree to "露点" above

        ③ reduce screw speed, improve/increase extrusion machine add hot temperature degree

        ④提髙吹胀 gas pressure

        ⑤清理 pressure shrink gas 通道, 检査吹 gas is gas

        ⑥ more sleeve/set, 模芯, improve/increase type 坯吹胀 ratio

        四, blow molding product decrease/reduce:

         generate causes:

        ① type thick increase large, products increase thick

        ② products shrinkage rate increase, products dimensions 縮

        ③吹胀 gas pressure small, products 未吹胀 to type design dimensions

         solution measures:

        ① adjustment control plant/unit, make type thick decrease small; improve/increase type melt temperature degree, reduce type 坯离模膨胀 ratio

        ② more shrinkage rate small resin,延 long gas time, reduce mold cooling temperature degree

        ③适当提髙 pressure shrink gas pressure

        五, blow molding product product or 图文不清晰:

         generate causes:

        ① type gas defect

        ②吹胀 gas pressure low

        ③ type melt temperature degree low, material material defect

        ④ mold cooling temperature degree low, mold has " cold 凝" phenomenon

         solution measures:

        ①修理 mold, type 腔喷砂处理 or increase gas 槽

        ② improve/increase gas pressure

        ③适当 improve/increase extrusion machine and machine add hot temperature degree, necessary add amount filling material

        ④ mold temperature degree to temperature degree above

        六, blow molding product flash more, thick:

         generate causes:

        ① mold 胀模, pressure 不足

        ② mold abrasion loss, 导柱偏移

        ③吹胀时, type 坯偏斜

        ④夹坯刀口处逃 material shallow or deep degree shallow

        ⑤ type gas 启动 早

         solution measures:

        ①提髙 mold pressure, combined reduce gas pressure

        ②修理 mold 刀口, positive or more mold 导柱

        ③校 positive type and gas in 心位置

        ③修整 mold, add deep material or deep degree

        ④ adjustment type gas time

        七, deep toward strip/profile 纹:

         generate causes:

        ①模口处肮脏

        ②模 sleeve/set, 芯边缘 has or 缺口

        ③ masterbatch material or resin separation understanding generate deep color strip/profile 纹

        ④ 滤网穿洞, material material mixed 入杂质沉积 in 模口

         solution measures:

        ① use copper 刀清理模口

        ②修整口模

        ③适当 reduce temperature degree, more dispersion property good masterbatch material

        ④ more 换 滤网 sheet/plate, use 沾 边角 material

        八, molding type by 吹破:

         generate causes:

        ① mold 刀口太尖锐

        ② type has or bubbles

        ③吹胀 ratio large

        ④ type melt strong/high degree low

        ⑤ type long degree 不足

        ⑤ type 坯壁太 thin or type thick thin non-uniform

        ⑥ container in mold opening 时胀裂(放 gas time 不足)

        ⑦ mold clamping force 不足

         solution measures:

        ①适当 add large wide degree and degree

        ② use drying raw materials, wet raw materials dry rear use, use raw materials;清理模口

        ③ more sleeve/set, 模芯, reduce type bad ratio

        ④ more combined raw materials, reduce melt temperature degree

        ⑤检查 extrusion machine or material machine control plant/unit, decrease/reduce process parameters 变动, increase type long degree ⑥ more sleeve/set or 模芯, add thick type 坯壁; type control plant/unit; adjustment 模口间隙

        ⑦ adjustment gas time or mold 启模启动 time

        ⑧提髙锁模 pressure or reduce gas pressure

        九, blow molding products demolding difficult:

         generate causes:

        ① products cooling time long, mold cooling temperature degree low

        ② mold design defect, type surface has 毛刺

        ③启模时, front rear sheet/plate speed degree 不均衡

        ④ mold 安装错误

         solution measures:

        ①适当縮 short type 坯吹胀 time, mold temperature degree

        ②修整 mold; decrease/reduce deep degree, 凸筋斜 degree is 1: 50 or 1: 100; use demolding agent

        ③修理锁模 plant/unit, make front rear sheet/plate speed degree 一致

        ④ heavy new mold,校 positive semi 模 安装位置

        十, blow molding products quality large:

         generate causes:

        ① type thick 突然变化

        ②掺人 边角回 material mixed combined non-uniform

        ③进 material 段堵塞, formed extrusion machine material 波动

        ④ add hot temperature degree 不均衡

         solution measures:

        ①修理 type control plant/unit

        ② using/adopting good mixed material plant/unit, long mixed material time; necessary decrease/reduce 边角回 material use amount

        ③ remove material 口处结 block material

        ④ material or material. reduce material temperature degree

        ⑤ more electrical add hot 阁