Hello, welcome to this website!

中文版 | English| Contact us

Counseling hotline13102889793

热门关键词: Extrusion granulation machine

首页大图
Contact us
Counseling hotline:13102889793

Shijiazhuang Xi Rong Machinery Co., Ltd.

地址:Shijiazhuang City West Development Zone of Wuji County

传真:0311-86504778

手机:13102889793

联系人:Manager Wang

邮箱:wlh88888888@163.com

The principle and fault maintenance of the granulator

作者:kefu 发表时间:2018-01-25   09:24:53

After the plastic is added to the hopper, the hopper falls smoothly on the screw, and is bitten by the screw thread. As the screw is rotated by the screw, the screw is forced to the head direction, forming a process of mechanical transport. When the plastic filling mouth is running to the head of the machine, because the thread depth of the screw is gradually reduced and the resistance of the filter net, the splitter plate and the head is present, high pressure has been formed in the plastic plasticizing process, and the material is pressed so tightly that the heat transfer conductivity is improved and the plastic is melted quickly and gradually increasing. Pressure is used to discharge gas from the exhaust port between the original particles.

As the pressure rises, plastic is heated externally on the one hand. On the other hand, the plastic itself has produced a lot of heat due to internal friction during the movement of compression, shearing and stirring. Under the combined action of external force and internal force, the plastic temperature increases gradually, and its physical state has also experienced a glass state, a high elastic state, viscous flow. Changes in the state of the state.

The principle of plastic granulator

The main body of the plastic granulator is the extruder system, which is composed of extrusion system, transmission system and heating and cooling system.

Extrusion system: the extrusion system includes a screw, a barrel, a hopper, a head, and a die, and plastic is plasticized into a uniform melt through the extrusion system, and under the pressure of this process, the extruder is continuously extruded by the screw.

1. Screw is the most important part of the extruder. It is directly related to the application scope and production efficiency of the extruder. It is made of high strength and corrosion resistant alloy steel.

2, cylinder: a seamless metal tube, generally used as heat-resistant, high pressure resistance, strong wear resistant, corrosion resistant alloy steel or composite steel lined steel lined steel lining. The machine barrel is matched with the screw to realize the crushing, softening, melting, plasticizing, exhausting and compacting of the plastics, and continuously conveying the glue to the molding system. The length of the general cylinder is 18:1 of its diameter, so that the plastics can be fully heated and fully plasticized.

3. Hopper: the bottom of the hopper is equipped with a cut-off device to adjust and cut off the material flow. The side of the hopper is equipped with a sight hole and a calibrating metering device.

4. Die and die: the die is made up of alloy steel inner sleeve and carbon steel coat, and the molding die is installed inside the machine head.

Failure and maintenance of plastic granulator

First, the unstable current of the main engine causes uneven feeding, damaged main motor bearings or poor lubrication. A heater is out of order or the phase is not correct. The screw is not adjusted correctly, and the components interfere.

Troubleshooting, check feeder and replace bearing if necessary. Repair the main motor and replace the heater if necessary. Check whether the heater is working normally, pull out the screw, check whether there is interference or not, check the adjusting pad.

Two, the main motor can not start: the driving order is wrong, should check whether the fuse wire is burnt or not; the main motor thread has a problem; the linkage device related to the main motor function.

Re start the car according to the correct driving sequence, check the sequence, check the main motor circuit and check the state of the interlocking device related to the main motor. The oil pump is not open to check whether the lubricating oil pump is started. The motor can not be turned on, turn off the main power and wait for 5 minutes before starting. The frequency converter is not finished, and check whether the emergency button is reset.

Three, the head is not smooth or blocked: the material is not plasticized, and the molecular weight distribution of a part of the heater is not wide. The operating temperature is set low and unstable. There may be a foreign object that is not easy to melt.

Replace it if necessary, check the heater and consult with the technician when necessary. Verify the setting temperature of each section; raise the temperature setting value; check the extrusion system and the nose.

To correctly understand the working principle of plastic granulator, we can correctly use and maintain the plastic granulator.



 

立即采购

  • 联系人:请填写您的真实姓名
  • 联系电话:请填写您的联系电话
  • 电子邮箱:请填写您的邮箱地址
  • 意向描述:
  • 验证码:验证码,看不清楚?请点击刷新验证码