Working principle of plastic granulation machine
After the plastic is added into the hopper, the hopper is smoothly on the screw, and the screw threads are bit. As the rotation of the screw is pushed by the screw thread, the direction of the machine head is pushed forward. Plastic from the feed port running toward the head when, due to the screw thread depth decreases, due to filter and shunt resistance of the plate and nose, in plasticizing process formation pressure is very high, the material pressure very dense, improved the heat conduction of it, helps to the plastic melt quickly. At the same time, gradually increasing pressure to make the original news is that the gas from the exhaust vent gas.
Pressure rise at the same time, the plastic is external heating, on the other hand plastic itself in compression, shear and mixing process, due to the internal friction also produced a large amount of heat, under the combined action of the external and internal forces, plastic temperature gradually increased, the physical state also experienced glass state to the high elastic state to a viscous state changes. Generally speaking, in the feed is mainly glass state and a gradual reduction in the screw thread of the middle part of the compression section material mainly in from elastic state, and gradually melt, and materials to the compression section and the rear section in the viscous flow the, here plastic has fully plasticizing, by the effect of the screw reasoning will plasticized plastic set pressure, the quantitative and uniformly continuous from the nose of the extrusion.
Plastic granulation equipment components
1, extrusion system, extruding system includes a screw, barrel, hopper, head and die, plastic through extrusion system and plasticizing into homogeneous melt, and in the process the established pressure, screw continuous extrusion dies.
2, transmission system: the role of the transmission system is to drive the screw, the supply of the screw in the process of extrusion torque and speed, usually with the motor, reducer and bearing.
3, heating and cooling device: heating cooling is plastic extrusion process can be carried out the necessary conditions.
(1) now extruder usually is electric heating, divided into resistance heating and induction heating, heating pieces in various parts of the body, neck and head. The heating device is heated by the plastic inside the external heating tube to reach the temperature required by the process operation.
(2) the cooling device is designed to protect the plastic in the temperature range of the process requirements. Specifically in order to eliminate the excess heat generated by the shear friction rotation of the screw in order to avoid excessive temperature so that plastic decomposition, coke burning or the difficulty of setting. Cylinder cooling water cooling and air cooling two, generally small extrusion machine adopts air cooling more appropriate, large, multi use water or two forms combined with cooling; cooling screw mainly adopts water cooling to increase the rate of transport of solid material, the quantity of cement stable, at the same time improve the high quality of the products; but in the cooling of the hopper, one is to strengthen the role of solid conveying, prevent due to the temperature of the particle sticky jam feeding port, and the second is to ensure normal operation of the transmission part of the.
Characteristics of plastic machine
Production capacity from 100kg/h~450kg/h, total power output from the 90kw~24okw, the power consumption coefficient of 0.3~0.55. The weight of the whole machine 4T~11T, the unit is usually placed in the 7 font corner space, the size of an area is usually 6m*8m, smaller models are usually operated by 2 people, models are larger, the need for 3~4 operator.
Traditional feeding methods for the upper part of the artificial feeding, there is a certain security risk. Singapore film granulation machine, using artificial lateral deep bucket material, so to completely eliminate security risks.
The new crawler conveyor can realize mechanical spinning feeding, high yield, reduce the labor intensity of workers
Dual channel intelligent temperature control, machine drum wind cooling ring to achieve automatic temperature precise control, effectively avoid the partial color, color uniformity of material and color of transparent materials.
According to customer raw materials and specific requirements, choose to use a single exhaust or vacuum pumping, can effectively avoid the honeycomb, bubble, and no gloss, etc.. Qieli Ji burden are all made of stainless steel and chrome plating process, pneumatic pressure feed and import tool material to ensure neat incision, uniform particles.
When the moisture content of particles is higher, the closed loop double channel moisture absorption machine can be selected, and the dewatering rate can reach over 95%.
Stainless steel air discharging device and granulator outlet connection, automatic material receiving.
Power from 20kw~75kw, (power consumption coefficient of 0.3~055). Whole weight from 1t~2.5t. Placed in the form of a straight line. The floor area is usually (1.2m~1.8m) * (7m~9m).
Before leaving the factory, according to the 1:1 production state test machine. Customer plants need to prepare the corresponding main power, cooling circulating water, compressed air.
|Cutting mode||water cooling strand or water ring die-face hot pelletizer|