In the past, people could not do many things with plastic because plastic only began to be mass-produced in 1950. Plastic was mainly used to make packaging, household appliances, toys and consumer products. other. Now, people can do a lot of things with plastic such as using plastic to produce electronic components, cars, airplanes, medical equipment and many other fields. The future of plastic is very potential because plastic can be recycled or transformed into new materials.

Plastic has many advantages such as being a light, durable, inexpensive and easily adjustable material. But plastic also has many disadvantages that pollute the environment, affect human and animal health and consume a lot of energy during the production process. Therefore, we need to use plastic reasonably and responsibly.

• Discoloration: This is when the color of the molded part does not match the desired or expected color, caused by the contamination or degradation of the plastic material during the molding process. To prevent or minimize discoloration, the material should be properly dried, mixed, and stored.

• Warping: This is the distortion or deformation of the molded part, caused by the uneven cooling or shrinkage of the plastic material during the molding process. To prevent or minimize warping, the cooling system and the mold temperature should be uniform and controlled.

• Vacuum voids: These are air pockets or bubbles that form inside the molded part, caused by the insufficient packing or venting of the plastic material during the molding process. To prevent or minimize vacuum voids, the injection speed, pressure, and time should be increased and optimized. 

  Checking the air line pressure gauges to make sure they are within the recommended range. This should be done daily before starting the machine.

  Cleaning the chip filters to prevent clogging and overheating. This should be done daily after finishing the work.

Inspecting the coolant levels and topping up oil levels to keep the machine lubricated and cool. This should be done weekly or as needed.

  Inspecting the drive belt for any cracks or damage and replacing it if necessary. This should be done semi-annually or as recommended by the manufacturer.

  Changing/inspecting the oil in the headstock, gearbox, and apron to prevent corrosion and contamination. This should also be done semi-annually or as recommended by the manufacturer.

  These kinds of maintenance work are important to extend the life of the machine, improve the quality of the workpiece, and prevent accidents and injuries.