Taking the road of green development is the only way for the current plastic recycling granulator

The recycling and utilization of waste plastics is a green development project. If you use the plastic recycling granulator of Suzhou Stplas Machinery, this problem can be solved reasonably.

The auxiliary equipment of the plastic recycling pelletizing unit mainly includes the pay-off device, the straightening device, the preheating device, the cooling device, the traction device, the meter counter, the spark tester, and the wire take-up device. The purpose of the extruder unit is different, and the auxiliary equipment used is also different. Such as cutters, blow dryers, printing devices, etc.

Preheating device: Preheating of the cable core is necessary for both insulation extrusion and sheath extrusion. For the insulation layer, especially the thin layer insulation, the existence of pores cannot be allowed. The wire core can be completely removed from the surface of water and oil by high temperature preheating before squeezing. For sheath extrusion, its main function is to dry the cable core to prevent the possibility of pores in the sheath due to moisture (or moisture around the cushion layer). Preheating can also prevent the residual internal pressure of the plastic due to quenching during extrusion. During the extrusion process, preheating can eliminate the large temperature difference formed when the cold wire enters the high-temperature die and the die is in contact with the plastic, avoiding fluctuations in the extrusion pressure caused by fluctuations in the plastic temperature, thereby stabilizing the extrusion volume and ensuring Extrusion quality. Electric heating core preheating devices are used in the extrusion unit, which require sufficient capacity and ensure rapid heating, so that the core preheating and cable core drying efficiency are high. The preheating temperature is restricted by the line speed, and is generally similar to the head temperature.

Cooling device: The molded plastic extruded layer should be cooled and shaped immediately after leaving the machine head, otherwise it will deform under the action of gravity. The cooling method usually adopts water cooling, and according to the water temperature, it is divided into rapid cooling and slow cooling. Rapid cooling is direct cooling by cold water. Rapid cooling is beneficial to the shaping of the plastic extruded layer. However, for crystalline polymers, due to the sudden heat cooling, it is easy to leave internal stress in the extruded layer structure and cause cracks during use. Generally, PVC The plastic layer is quenched. Slow cooling is to reduce the internal stress of the product. Water of different temperatures is placed in the cooling water tank in sections to gradually cool the product. The extrusion of PE and PP is carried out with slow cooling, that is, through hot water, warm water and cold water. Three-stage cooling.