Introduction to the process of cleaning screw of bmc injection molding machine
Professional bmc injection molding machine manufacturers will clean the screw after the injection molding machine is shut down. Cleaning the screw can save raw materials and ensure stable production and manufacturing. Why? Because the screw will melt the material when working outdoors, and the molten material will be carbonized in the barrel. In the long run, the screw is easy to be corroded by irritating materials. Then, how to clean the screw? Next, we will talk about the key points and operation steps of the screw cleaning of the injection molding machine.
Generally, it is difficult to clean the material barrel of equipment used for manufacturing new products with color by bmc injection molding machine. Before cleaning, we should make the following preparations in advance:
1. Check the material barrel and discharge the raw materials.
2. According to the residual material and color in the original screw, specify the material to be used for cleaning the screw.
3. Ensure that the operating platform of the injection molding machine is clean to prevent dirt from falling into the cake.
4. Set the temperature of the washing screw and prepare the special tools for separating the blocks in advance.
After full preparation, start cleaning and operation. The cleaning process is as follows:
1. After the material pipe reaches a certain temperature, check whether the back pressure meets the requirements.
2. After the finished product of the screw is ejected, add cleaning materials, and inject the stored materials according to the rapid, slow and rapid process. At this time, it is necessary to observe the ejected materials. If it is found that the materials are discolored, it is necessary to manually press the screw backward, and then empty the injection. After such repeated actual operation for 3-4 times, follow the method of rapid, slow, rapid and air injection, and then operate for 3-4 times.
3. To produce fully transparent or crystal pure white goods, when more than 250T machinery and equipment are used, the nozzle must be removed first, and then the nozzle must be burned with liquefied gas, and then the waste oil or cleaning fluid can be used for cleaning.
In addition, attention should also be paid to the maintenance of the injection molding machine:
1. Check the temperature before starting. The temperature in the material tank of the large bmc injection molding machine needs to reach the preset temperature.
2. In the process of commodity injection molding, attention should be paid to making the raw materials melt evenly, which can reduce the transmission system torque that the screw can bear and increase the service life of the screw.
3. When replacing the plastic, clean the remaining materials in the inner corner of the barrel.
4. In the material barrel, the plastic can be used to prevent salivation only after it is completely melted, so as to prevent the parts of the transmission device from being damaged when the screw goes backwards.
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