Shanghai Daoqin Plastics Co., Ltd.

mono screw generally in has long degree upper separation is 三段, screw large small 螺距 螺 deep 确定三段 has long degree, generally 按各占三 separation 之一划 separation. material most rear 一道螺纹开始叫输送段: material material in requirements can 塑化, need preheating, pressure 挤实, extrusion 理论认 is material material is dispersion 体, rear through 证明此处 material material is solid 体塞, is this material material pressure rear is solid 体象塞子一样, therefore need formed 输送任务就 is it function. 第二段叫 pressure shrink 段, 此时螺槽体积由 large 逐渐变 small, and temperature degree need to material material 塑化程 degree, generate pressure shrink 由输送段三, in this pressure shrink to 一, this screw pressure shrink ratio －－3: 1, has machine has 变化, formed material material to 第三段. 第三段 is amount 段, material material maintain temperature degree, is amount that 样准确, amount melt material material, to machine 头, temperature degree can low 于塑化 temperature degree, generally high 点.