Experimental extruders are equipment specifically designed for laboratory environments, mainly used for research on polymer plastics, as well as the development and testing of new materials and processing processes. The following is a detailed introduction to the experimental extruder:
Experimental extruders are mainly divided into two types: single screw extruder and twin screw extruder:
1. Single screw extruder:
Main features: screw diameter is small, reduce the amount of material used, suitable for laboratory environment.
Structure: Single reducer, single screw, screw made of high quality carbon steel or high strength corrosion resistant alloy steel.
Function: Mainly used in the research and development of polymer plastics, as well as formula testing and process optimization.
2. Twin screw extruder:
Key features: Two intermeshing screws provide a stronger cutting and mixing effect.
Structure: the barrel can be split, the screw and the barrel lining sleeve can be combined at will, flexibly adapt to different materials and process requirements.
Function: Widely used in material research and development, formula testing, small batch production and process optimization.
The working principle of the experimental extruder is mainly based on the principle of physical extrusion:
1. Feeding: The raw material is put into the bucket of the extruder, and through the synergistic effect of the bucket and the rotating small hopper, the raw material is effectively transported to the feeding port of the extruder.
2. Construction material: an adjustable screw is installed inside the extruder. When the raw material enters the extruder, the screw begins to rotate slowly, so that the raw material gradually forms a uniform material layer between the screw and the cylinder wall, and then forms a material column.
3. Melting: There is a heating device inside the extruder to heat the material, so that it gradually changes from solid state to molten state, enhancing the fluidity of the material.
4. Extrusion: When the material column is completely melted, the screw continues to move forward, pushing the material column along the direction of the screw, and finally out of the extrusion outlet, is shaped into the desired shape.
5. Cooling and curing: The material flowing out of the extrusion outlet is then passed through the cooling device, which rapidly reduces the temperature and solidifies to maintain the desired shape.
Experimental extruders have the following main advantages:
1. Efficiency: With efficient production capacity, can complete a large number of production tasks in a short time.
2. Versatility: a wide range of applications, not only limited to extrusion molding and mixing processing of polymer materials, but also for food, feed, electrodes, explosives, building materials and other fields.
3. Modular and professional design: it can flexibly adapt to the special requirements of different users, shorten the research and development cycle of new products, improve the overall quality and reduce costs.
4. Easy operation and maintenance: with intuitive and easy to understand operation interface and convenient design, easy for users to master operation skills and maintenance.
5. Space saving: Usually small and portable design is used to save laboratory space and facilitate users to carry out experiments in a limited space.
Experimental extruders have a wide range of applications in many fields:
1. Material research and development: for the research and development of new materials, such as new plastic alloys, fillers and reinforcement materials.
2. Formulation testing: used to test and optimize the formulation of various polymer materials, including the mixing effect of additives, stabilizers and pigments.
3. Education and training: used in academic and educational institutions for teaching experiments and student training to help students understand the actual process of polymer processing.
4. Small batch production: It provides an efficient and economical solution for special materials or optional composite materials that require small batch production.
5. Process optimization: It is used to optimize the processing technology, such as temperature control, shear rate and residence time, to ensure the quality of the final product.