Shanghai Daoqin Plastics Co., Ltd.

         injection molding parts defect usually and surface has 关, but also is plastics from mold surface shrinkage 脱离形 formed.

        一, formed defect causes

        (1).熔 melt temperature degree is high is low.

        (2). mold cavity inner plastics 不足.

        (3). cooling stage/phase 时接触 plastics hot.

        (4). runner combined 理, gate small.

        (5). mold temperature is and plastics features versus 适应.

        (6). product structure combined 理(add strong/high high, thick, obvious thick thin 不一).

        (7). cooling 效果不 good, product demolding rear shrinkage.

        二, remedy methods

        (1). adjustment material temperature degree.

        (2). adjustment screw speed degree obtain positive screw surface speed degree.

        (3). increase injection molding amount.

        (4). ensure use positive 确 垫 material; increase screw toward front time; increase injection molding pressure; increase injection molding speed degree.

        (5).检查止流阀 is 否安装 positive 确,因 is non positive 常运行会引致 pressure 流失.

        (6). reduce mold surface temperature degree.

        (7).矫 positive runner pressure loss large; according to need,适当 expand large dimensions.

        (8). according to use plastics features and product structure control mold temperature.

        (9). in 允许 情况 lower improvement product structure.

        (10).设 method let product has cooling.