Shanghai Daoqin Plastics Co., Ltd.

injection disadvantages and phenomenon most in in injection molding parts products quality upper 反映出. injection molding parts products disadvantages can separation formed lower 列几点: （1） product injection 不足; （2） product 溢边; （3） product and bubbles; （4） product has 接痕; （5） product 发脆; （6） plastics color; （7） product has silver streaks, and flow marks; （8） product gate mixed 浊; （9） product warpage and shrinkage; （10） product dimensions 不准; （11） product viscous inner; （12） material material viscous runner; （13） nozzle 流涎. lower 面一一叙述 its generate causes and 克服 办 method. ⒈ how to product injection product material 不足往往 due to material material in 未充满 type front already solid 化, also has other multiple causes. ⑴ equipment causes: ① material in material; ② material shrink separation or full 部堵塞; ③ add material amount 不够; ④ add material control system as positive 常; ⑤ 注 pressure machine 塑化容 amount small; ⑥ equipment formed injection cycle 反常. ⑵ injection molding parts conditions causes: ① injection pressure low; ② in injection cycle in injection pressure loss large; ③ injection time short; ④ injection full pressure time short; ⑤ injection speed rate slow; ⑥ mold cavity inner material in 断; ⑦ 充模 speed rate and other; ⑧ 操 as conditions formed injection cycle 反常. ⑶ temperature degree causes: ① improve/increase material temperature degree; ② improve/increase nozzle temperature degree; ③ 检查 milli 伏计, hot electrical 偶, electrical retardant electrical hot 圈（ or outer add hot plant/unit ） and add hot system; ④ improve/increase mold temperature; ⑤ 检查 mold temperature control plant/unit. ⑷ injection molding parts mold causes ① runner small; ② gate small; ③ nozzle small; ④ gate 位置不 combined 理; ⑤ gate 数不足; ⑥ cold material small; ⑦ 排 gas 不足; ⑧ injection molding parts mold formed injection cycle 反常; ⑸ material material causes: material material flow property 太差. ⒉ how to product flash material: product 溢边往往 due to defect formed, other causes has: injection force large clamping force, material material temperature degree high, gas 不足, add material amount, upper has material and other.