A polymer material that has been supplemented with the required additives is melted and moulded continuously in the plastics extrusion process, which is typically used for high volume manufacturing.
Granules of the raw material (polymer) are gravity fed into the hopper through the feed throat and are then dropped on a revolving screw. An electric motor is used to rotate the screws. The screw design varies and is based on the material and design of the finished product. The Medical Plastic Extrusion Market is forced into a heated barrel by the rotation of the screw. Plastic is compressed as it travels through the barrel because the channel or thread of the screw narrows. The barrel is heated by three or more independent PID controllers, which produce zones with steadily rising temperatures.
