New orders are being assembled.
PVC garment lining extruder machine is being assembled at the factory.
Next, let's discuss the production process of PVC garment lining equipment.
1. Batching and Mixing (Key: Uniform Dispersion of Raw Materials)
The goal is to thoroughly mix the solid resin, liquid plasticizer, and various additives to form a uniform "PVC premix" to avoid localized property variations (such as varying hardness and color) during subsequent molding.
1. Mixing Equipment
High-speed mixer: This is the core equipment. It uses shear and friction generated by high-speed rotation (500-1000 rpm) to rapidly disperse the raw materials and heat them up (taking advantage of the oil absorption and heat release properties of PVC resin).
Cooling mixer: In conjunction with the high-speed mixer, it cools the high-temperature premix (80-100°C) to 40-50°C to prevent clumping (plasticizers at high temperatures can easily cause the resin to stick together) and facilitate subsequent storage and processing. 2. Mixing Process
First, add PVC resin powder to a high-speed mixer and start stirring at a low speed (200-300 rpm).
Gradually add the plasticizer (add in 2-3 batches to prevent resin agglomeration) and stir for 5-8 minutes until the resin has completely absorbed the oil (no visible liquid separation).
Add the heat stabilizer, lubricant, filler, and colorant in sequence. Increase the speed to 600-800 rpm and stir for 10-15 minutes, raising the temperature to 80-100°C (using a jacket to control temperature to prevent overheating and degradation).
Drain the hot mixed material into a cooling mixer and stir at a low speed (100-200 rpm). Cool the mixture to 40-50°C with cooling water. Discharge the material and store it in a sealed container to prevent moisture absorption. PVC garment lining extruder machine primarily uses calendering and extrusion, with both processes suited to varying thickness and production requirements:
3. Calendering (mainstream process, suitable for thin, large-area linings, thickness 0.2-1.5mm)
Principle: The PVC premix passes through the high-temperature rollers of a multi-roll calender (heated and pressurized) to plasticize into a continuous sheet film. The film is then cooled, drawn, and wound to set the shape.
4. PVC garment lining extruder machine uses extrusion (suitable for thick, cross-section linings, thickness 1.0-3.0mm, such as grooved waistband linings).
Principle: The PVC premix is fed into the extruder, heated and sheared by the screw, and then extruded through a flat die into a sheet. The sheet is then cooled, set, and cut.
Key equipment: Single-screw extruder (screw aspect ratio 20-25:1), flat die (die width designed according to product requirements), cooling trough/chilling rollers. Core Parameters:
Extrusion Temperature: Barrel temperature 140-160°C, die head temperature 160-170°C, die temperature 150-160°C;
Screw Speed: 10-30 rpm to ensure stable discharge;
Cooling: The extruded sheet is first air-cooled (for initial shaping) before entering a cooling water tank at 20-30°C (for complete shaping) to prevent surface water marks.
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