EVA (ethylene vinyl acetate copolymer) is a commonly used plastic material with excellent processability and physical properties, so it is widely used in various fields. Then, the relevant methods of EVA processing will be introduced next, including extrusion, injection molding, calendering and hot pressing.
1. Extrusion method
Extrusion is a common EVA processing method. EVA particles are heated and melted and then the melted EVA is extruded through an extruder. This method is suitable for producing EVA products of various shapes, such as plates, pipes, profiles, etc. The extrusion method has the advantages of high production efficiency and low cost, so it is widely used in industrial production.
2. Injection molding method
The injection molding method is to inject molten EVA into the mold, and through cooling and solidification of the mold, the required EVA products are obtained. Injection molding method is suitable for producing complex-shaped EVA products, such as soles, parts, etc. This method has the advantages of short production cycle and stable product quality, so it is often used in industrial production.
3. Calendering method
The calendering method is to continuously extrude and calender the molten EVA through a calender to rapidly cool it into a film shape. This method is suitable for the production of EVA films, packaging films and other products. The calendering method has the advantages of fast production speed and good product uniformity, so it is widely used in the packaging industry.
4. Hot pressing method
The hot pressing method is to put the melted EVA sheet into a mold, and solidify it through the heating and pressure of the mold. This method is suitable for the production of EVA insoles, EVA sponges and other products. Hot pressing has the advantages of high molding accuracy and good product quality, so it is widely used in shoe materials, home furnishing and other industries.
To sum up, EVA processing methods include extrusion, injection molding, calendering and hot pressing. Different processing methods are suitable for different products. Choosing the appropriate processing method can improve production efficiency and product quality. In actual operation, it is necessary to select the appropriate processing method according to product requirements and production conditions, and make corresponding process adjustments and equipment selection. By continuously optimizing and improving processing methods, the performance and competitiveness of EVA products can be improved to meet market demand.
Post time: May-31-2024