The extrusion effect of PVC cable material directly affects the usage effect of the cable and also affects customers purchasing desire

Burning phenomenon during extrusion of PVC cable material

Mold companies exporting cigarettes and odors have strong demand stimulation and cracking sounds; There are burnt particles on the surface of plastic materials; There are continuous bubble joints.

What is the reason? How can we improve it?

1. The screw needs to be used for long-term economic development, and if the screw is not cleaned, accumulated burnt material will be carried out; The dismantling screw cleaning technology has completely solved the problem. Reply to "Screw" for more related articles

2. Heating time is too long, causing plastic aging and burning; Shorten the heating time, check if there are any problems with the heating system, and repair it in a timely manner.

Poor plasticization of PVC cable material extrusion

Plastic packaging materials and small particles with toad skin phenomenon, blackening on the surface, and a very small enterprise affecting cracks or no problem with plasticization. There are obvious traces at the intersection. Reply to "PVC" for more articles

What is the reason? How can we improve it?

The temperature is too low, just raise it a little bit.

2. During granulation, the mixed distribution of plastics is uneven or there are particles that are difficult to plasticize during the development of plastics.

3. The development speed of screws and traction is growing too fast, and plastics are not fully plasticized; Moderately slow down the speed in China, extend the heating and plasticizing time, and improve the plasticizing effect.

4. Material issues; Change the material.

Poor extrusion surface of PVC cable material

What is the reason? How can we improve it?

1. When the resin is not plasticized, it is difficult to plasticize, resulting in the appearance of small crystal points and particles on the surface, which are distributed on the surface. The temperature should be appropriately increased or the traction line speed and screw speed should be reduced. Reply to "screw" or "mold" to view more related articles

2. When adding materials, other impurities are mixed in, and there are impurity lumps on the surface; When adding materials, it is necessary to strictly prevent the mixing of various impurities. If impurities are found in the enterprise's products, we should immediately clean the machine head and drain the adhesive in the screw control system management memory.

3. The diameter surface of the bearing wire of the mold sleeve is not smooth or has grooves, or there is a buildup of plastic decomposition products at the mold mouth, leaving traces on the surface; When selecting a mold, the flatness of the bearing wire diameter surface should be carefully checked, and the mold mouth temperature should be appropriately reduced. Any sediment found at the mold mouth should be immediately removed.

When the cable core is too heavy, the tension of the discharge line is low, the cooling effect is poor, and the surface of the plastic material is prone to wrinkling; The tension should be increased in the front, and the traction line speed of the latter should ensure that the cooling time of the system is reduced.