Shanghai Daoqin Plastics Co., Ltd.

        一, mold causes:

        (1)产 front remove full 检, can has anti 止沾油 and has product and runner material mixed powder 碎材而 by utilizing (especially is in production process in 出现而 non in 初始试 as 时出现);

        (2) mold gate small or coarse 糙, 会导致 generate a large amount of abrasion scratch hot, if mold gas defect, 就会致 make gas 体燃烧 generate obvious black strip/profile 纹(黑斑).

         二, equipment causes:

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        (3) drying machine long as, nano 垢, must 定期清扫;

        (4) drying machine must 定期清扫, more 换, 否则会进入异 material or 因通风不 good material color, block;

        (5) drying machine as 业人员 hydrophobic or as equipment and other factors formed material 筒未(完 full)密封, 导致空 gas in powder 尘进入; or powder dispersion, 污染周边 product and powder machine inner material; or material large, as easy, 忽略夹角(输 material tube/pipe and its 接口处) and other factors, 导致换 material process in, material 筒未完 full 清净.

        (6) long production as, 平常没 has as good anti 护, mixed equipment dispersion 落灰尘;

        (7) powder machine 遮蔽不 to 位, 导致受污染 and 污染别 材 material;

        (8) powder machine amount black and white use;

        (9)射嘴孔径太 small or inner coarse generate a large amount of abrasion scratch hot, if mold gas defect, 就会致 make gas 体燃烧 generate obvious black strip/profile 纹(黑斑);

        (10)炮筒 or abrasion loss, crazing bending 时, polymer 一部份 hot generate 黑纹(黑斑);

        (11) 胶圈部 abrasion loss 时, front method 顺畅呈挤 material phenomenon, in material tube/pipe inner more gas 体, injection shot 顺畅时, 因急剧 abrasion scratch generate 黑纹;

        (12) outer and 缸壁间隙公差太 small make screw generate relatively large retardant force 面, from generate abrasion scratch hot 导致黑纹 generate (can will 胶圈拆卸 outer abrasion small strip/profile or more 换公差 relatively large new product, make screw 顺利熔胶);

        (13) screw and material tube/pipe generate non large abrasion scratch hot;

        (14) screw pressure shrink ratio large, material 部份沟 relatively shallow and inner and raw materials generate relatively large abrasion scratch force make raw materials hot separation understanding generate 黑纹(黑斑);

        (15) temperature degree positive 确, electrical hot sheet/slice temperature degree and temperature degree table/sheet 误差太 large, certain temperature degree hot easy 直觉, utilizing amount device 检视之.

        三, material:

        (16) raw materials belt/tape black spots, black spots ratio/proportion ultra- 客户入 material 检验之容许 scope/range or formed product 之允许 standards;

        (17) Raw Materials bag in 运输, 搬运, process in loss or to 污染, mixed material;

        (18)材 material in 人工配 ratio or material mixed material;

        (19) has raw materials in need add lubricant, if add 不足, 就会严 heavy generate abrasion scratch hot, waste gas more troubleshooting and 时, formed gas 体燃烧 generate 黑纹(黑斑);

        (20) Raw Materials heat resistant property 不足, method as temperature degree, raw materials (additives)受 hot understanding;

        (21) material bag or material bag 处不洁净, again use 时, 导致异 material mixed 入.

        四, its it causes:

        ▶▶ (22)炮筒 in long time production different material, temperature degree high low 变化, oxidation, degradation, and various material for metal surface force different and other related factors, day month 累, in screw surface, tube/pipe 壁, and other 处, 逐渐形 formed carbon 化层, to property relatively high material by separation 离, belt/tape 出. another, screw and tube/pipe and other 部份, has or 缺口, will more easy let melt material 滞留, 而停开 machine frequency 繁时, will make upper issues more add heavy;

        ▶▶ (23)不懂材 material powder defect product, 导致材 material mixed 淆;

        ▶▶ (24) defect product technology 员确认 is powder also is waste 弃;

        ▶▶ (25) more material 时, is as 业方便, 仅以风枪吹离残存 material 屑, method can will material 筒彻底清洁; or use in 现场狂轰乱炸, make powder 尘弥漫于整 workshop;

        ▶▶ (26)落 product or runner material 直接投入 to powder machine;

        ▶▶ (27) defect product use 风枪吹几 lower powder 碎;

        ▶▶ (28)处理红箱 inner product 时, powder machine inner 直接倒入;

        ▶▶ (29)处理异 material mixed 入时, 发现 一 causes is to full true causes;

        ▶▶ (30) powder machine has sheet/slice phenomenon, has and adjustment pipe/tube material;

        ▶▶ (31)特殊材 material 如PP, PMMA, ABS machine methods 掌握不准确;

        ▶▶ (32) add material methods has 误, add black material 而直接 add white material, can can electrical or causes make 黑屑落入 white material inner;

        ▶▶ (33)洗 machine 时未完 full 置换出 material tube/pipe in use low temperature material, as temperature degree rise high 时, make low temperature material (anti agent, additives and other)无 method 承受此 temperature degree, thermal degradation, this type of usually in nozzle 处(especially is in production process in 出现而 non in 初始试 as 时出现).