A twin-screw extruder is the machine based on the forced feeding of the gap between the two screws. The difference from the single-screw extruder is that the friction drag between them is related to the solid conveying. The extrusion process of a twin-screw extruder is simply a process in which two screws rotate in the barrel and push the plastic forward.
1. You can clearly understand the wearing situation
Due to the convenient opening, the degree of wear of the threaded element and the inner liner of the barrel can be found at any time so that effective maintenance or replacement can be carried out. It will not be discovered when there is a problem with the extruded product, causing waste.
2. It can reduce production costs
When the masterbatch is manufactured, it is often necessary to change the color. If it is necessary to change the product, the processing area opens within a few minutes, and the mixing process can be analyzed by observing the melt profile on the entire screw.
At present, the common dual-screw extruder needs to use a large amount of cleaning material to clean the machine when changing the color, which is time-consuming, energy-consuming, and a waste of raw materials. The split twin-screw extruder can solve this problem. When changing colors, the barrel can be quickly opened for manual cleaning in just a few minutes so that the cleaning material can be eliminated or used less, which saves costs.
3. It can improve labor efficiency
4. It has a wide range of applications and can be applied to processing different types of materials.
5. High output, high quality, and efficiency.
The advantages of ordinary twin-screw extruders can achieve high output, high quality, and efficiency.
From the functional point of view, the extruder screw can be divided into 3 sections: feeding, compression, and homogenization.
1. Feeding section: its function is to transport the plastic slices added by the hopper quickly. The groove volume in this section is generally unchanged, and the plastic is in a solid-state. Usually, the screw groove is not completely filled with the material. The degree of filling is related to the shape of the material, the degree of dryness and wetness, and the feeding device.
2. Compression section (plasticization section): The main function is to compact and plasticize the loose material conveyed from the feeding section and discharge the air brought by the clamp. The volume of the spiral groove in this section gradually decreases or suddenly decreases. The plastic gradually changes from a solid-state to a molten state in this section, becoming a continuous short fluid transported to the homogenization section.
3. Homogenization section (metering section): The main function is to plasticize further the molten material sent from the compression section evenly and evenly extrude the pipe material from the die at a fixed time and pressure.
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