Polyethylene Extrusion Foam Net
DATE：2021/11/1 8:35:56 / READ： / SOURCE：This station
Polyethylene Extrusion Foam Net
The traditional production method of plastic extruded nets requires multiple processes such as silk-grade resin wire stretching and knitting, which has low output, high cost, and limited application range. The production process and investment cost of plastic extruded nets are low, and only one extruder and a special mold for extruding plastic nets can be produced. The direct extrusion method produces plastic nets with low cost, high production efficiency, and the shape of the mesh can be changed, such as rhombus, oblique rhombus, hexagon, square, etc., and various plastics, such as polyethylene, polypropylene, can be used according to different applications. , PVC, etc. Here we mainly introduce polyethylene extruded foam net
The polyethylene extruded foam net is developed on the basis of the polyethylene extruded net. This kind of foamed net is light in weight, has certain elasticity, and has shock-proof and shock-absorbing effects. It is especially suitable for packaging fruits such as apples, pears, peaches, melons, and fragile and easily damaged items such as ceramics, glass products and precision instruments. It has a wide range of uses in the packaging field.
1. Principle of Extrusion Net Forming
The extruder continuously melts and extrudes the uniformly plasticized material, and passes through a special rotating head to form two strands of molten material flowing in different directions. When they merge to a combination point (intersection point), a grid is formed. After extruding and foaming, it is cooled and shaped into an extruded foamed net. The mold is composed of two parts, an inner mold and an outer mold that rotate with each other. The mold openings of the inner and outer molds each have the same number of semicircular holes. When the plastic enters the mold, the semicircular holes are combined with each other to form a full circle shape. If the semicircular holes are not combined, two semicircular strips are formed.
(1) Grid type
One mold body of the oblique diamond mold is rotating, and the other mold body is fixed, a group of semicircular bars are squeezed into a straight line along the pulling direction, and the other group is oblique lines, and the grid is oblique diamond
②The two parts of the diamond mold rotate relatively, and the two sets of semicircular bars are extruded obliquely, and the grid is diamond-shaped.
(2) Extrusion net type
If the cylindrical mesh die is round, the mesh is produced.
②The flat net T-shaped die, the upper and lower two die have semi-circular holes, which move in opposite directions to each other. The material is extruded from the upper and lower semi-circular holes. The plastic net out is a flat net.
Author：admin