The blown film machine mold head is composed of two parts: the mold body (mold core, mold cylinder, mold ring) and the heater (heating ring). The first step in selecting materials is to choose the appropriate ones.


The second step is forging, which involves forging the material into rough blanks for each part of the mold. The molecular structure of the forged blanks is denser.


The third step is to carry out lathe machining. According to the design drawings of the mold head, the mold head should be machined. During lathe machining, high-precision lathes and experienced lathe masters should be used as much as possible.


The fourth is polishing, polishing the flow channel part of the car's mold. The better the smoothness, the better the blown film, and the less silk there is. The fifth is chrome plating, which involves coating the flow channel of the polished mold with a hard layer of chromium, increasing the wear resistance and corrosion resistance of the mold head, and then polishing it to make the mold less prone to damage and less prone to retained coke.


Finally, install the various parts of the mold and then install the heating ring, and you are considered to have completed the task. The die head structure is optimized and shaped based on the characteristics of LDPE, HDPE, and LLDPE polyethylene through multiple comparative tests. It has the advantages of high internal pressure, stable and uniform extrusion, good film strength performance, and seamless matching with the extruder of this unit. Simultaneously changing the proportions of three types of polyethylene, mixed materials, and recycled materials for blown film production does not require changing the mold head