Shanghai Daoqin Plastics Co., Ltd.

        1, drying control ——含 water amount 5% below/following

        免 spray coating material and large more material 一样, absorption gas in water 汽. in molding processing front must drying, can can products surface silver streaks and water and effect/influence products surface gloss.

         usually requirements drying rear spray coating material water amount control in 0.05 below/following. 例如, for/regarding ABS基材 免 spray coating material, drying temperature degree usually is 70℃-85℃, drying 3-4 small 时.

         temperature degree high easy 引起材 material property can reduce; temperature degree low, drying time 不够, resin moisture content high, products surface easy generate gas 痕.

        2, injection molding temperature degree —— in low temperature injection molding

         due to spray coating resin in add metal material, in screw high function lower, easy metal material color. therefore, spray coating material molding temperature degree 设置原则 is in ensure material separation front lower, amount use in low temperature degree injection molding, anti material degradation.

        例如, 以ABS is 基材 免 spray coating material processing temperature degree is 210℃-230℃. temperature degree high, material degradation, products surface generate gas 痕.

        3, injection molding speed degree —— in speed separation 段阶梯式 control

         in use spray coating material injection molding 时, selection injection molding speed degree main/primary products appearance, mold gas and injection molding machine type inner resin flow retardant force.

         relatively fast injection molding speed degree generally make process/workflow add long, combined thin products, formed relatively good surface light degree and surface 效果. fast injection molding speed degree easy make 熔胶遭受 strong/high 剪切, 导致珠 light color powder and 粒径发生破 bad reduce products color color 效果. another, gate 附近容 easy 出现喷射痕, gas defect and other issues.

         therefore, in ensure product surface and quality front lower, selection in speed separation 段阶梯式 speed degree control, ensure 充填顺畅 and products appearance.

        4, injection pressure —— relatively low pressure

         injection pressure is is melt in flow process in retardant force, to melt 一定 充填 speed degree and for melt pressure 实, shrink, ensure process 顺利进行. injection molding pressure many amount has 关, 如: melt temperature degree, mold temperature degree, made parts 几何形状, thick, flow long degree, and its it mold and equipment 情况.

         usually, most good selection can meet/satisfy property can, appearance and injection molding ring relatively low pressure. meanwhile need 关注实际 injection molding value pressure and setting value 差异. generally lower, combined holding pressure pressure is injection pressure 60-80%.

        5, mold temperature degree —— relatively high mold temperature

         mold temperature degree effect/influence most products surface light degree, weld lines and its strong/high degree and other. use high mold temperature degree can increase material flow property, obtain relatively high combined strong/high degree, and can reduce molding products internal stress, make its heat resistant property and chemical resistant product property more good, meanwhile improve/increase for mold surface made property, improve/increase products gloss degree and color color 效果.

         is to surface quality 效果, in use spray coating material 时, amount using/adopting relatively high mold temperature. for/regarding ABS as is 基材 免 spray coating material, mold temperature usually is 70-90℃.

        总之

         has combined mold design, drying temperature degree, injection molding temperature degree, injection molding speed degree, combined mold temperature is spray coating material made formed appearance products can less conditions.