Classification And Working Principle Of Extruder

Extruder originated in the 18th century and is one of the types of plastic machinery. Based on the material flow direction of the nose and the screw ZX line, the extruder nose can be divided into the right Angle nose and the inclined Angle nose. Screw extruder is the use of screw pressure and shear force generated by screw rotation, can fully plasticizing and uniform mixture, rely on the mouth molding

The extruder is composed of the extrusion device (screw and material cylinder), transmission mechanism and heating and cooling system.Plastic extruder can be classified into single screw extruder, double screw extruder and multiscrew extruder. Double screw extruder according to the screw structure characteristics can be divided into parallel double screw extruder and cone double screw extruder, according to the relative position of the screw can be divided into fully engaged, non-engaged and partially engaged double screw extruder, according to the screw rotary steering can be divided into different direction double screw extruder and parallel double screw extruder.

Extruder is indispensable for plastic blending modification granulation. How does the extruder work? Let's see the following  picture

The extrusion method of the plastic extruder generally refers to the plastic melting at a high temperature of about 200 degrees, and the melted plastic forms the required shape when passing through the mold again. Extruding molding requires a deep understanding of plastic characteristics and rich experience in mold design, and is a molding method with high technical requirements.

Extruding molding is a method of forming the material continuously through the mouth mold in the extrusion machine, also known as "extrusion molding". Compared with other molding methods, it has the advantages of high efficiency and low unit cost. Extrusion method is mainly used for thermoplastics molding, but it can also be used in some thermosetting plastics. Extruded products are continuous profiles, such as pipe, rod, silk, plate, film, wire and cable coating, etc. In addition, it can also be used for plastic mixing, plastic granulation, coloring, admixture, etc

Micro parallel twin screw extruder pelletizer Micro parallel twin screw extruder pelletizer of Guangzhou POTOP Co.,Ltd.is a kind of highly efficient polymer extrusion molding equipment integrating mixing, mixing, extrusion and granulation. Its main uses are follows:

(1) Mixed-use modification

Different kinds, different grades of plastic by extrusion mixed into homogeneous plastic alloy or mixture, in order to obtain polymer materials with specific energy;

(2) Filling and modification

With a variety of inorganic fillers added to the plastic matrix, such as calcium carbonate, talc powder, etc., to greatly reduce the cost of products and improve the physical and mechanical properties of the material;

(3) Functionalization of composite materials

Plastic is mixed with various additives, such as stabilizers, flame retardants, colorants, etc., to obtain evenly dispersed and new new materials with specific functions;

(4) Enhance modification

Enhanced components, such as glass fiber, carbon fiber, are added to the plastic matrix to improve the physical and mechanical properties of composites;

(5) Extruding and granulation

This device can realize the homogeneous granulation of the polymer and its composites;

(6) Exhaust, unswing

That is, in the process of plastic mixing, we can quickly eliminate the polymer residual monomer, solvent, water, oligomers and other volatile components, improve the performance of the products;

(7) Screw restructuring

By optimizing the screw combination, the instrument can be used in a variety of powder materials and thermosetting plastics, mixing and grain making, and polymer reaction extrusion and other special fields;