eva film extruder with feed adjustment function

Abstract

The invention relates to an EVA film extruder with the function of adjusting material supply, and belongs to the technical field of extrusion molding of plastics. The EVA film extruder includes a main barrel, an extrusion screw inside the main barrel and a drive motor for driving the extrusion screw to rotate. The feeding end of the main barrel is provided with a feeding hopper, and the bottom of the feeding hopper is made into a cone top. It is downwardly conical and has an opening at the top of the cone. There is a die head at the discharge end of the main barrel, a regulating plate at the opening of the supply hopper, and a flow sensor for generating material flow information at the outlet of the die head. , the outside of the supply hopper is provided with an adjustment motor for driving the adjustment plate to rotate after receiving the material flow information, and the adjustment plate and the side wall of the supply hopper form a material passing channel. The EVA film extruder has the advantages of greatly changing the feed to the extruder in a short period of time and adapting to the requirements of fluctuations in the production of molten resin.

Description

technical field [0001] The invention relates to an EVA film extruder, which belongs to the technical field of extrusion molding of plastics. Background technique [0002] At present, the encapsulation of solar cells generally adopts ethylene-vinyl acetate copolymer (EVA) film to encapsulate the solar cells, and glues them together with upper and lower protective materials to form a solar cell module. EVA is a typical random polymer compound. It has good wettability when heated and melted, and good flexibility, stress crack resistance and bonding performance when cooled and solidified. It is an ideal energy-saving material. materials for solar cell packaging. [0003] EVA film forming adopts extrusion molding process. The whole production line usually includes mixing equipment, extrusion equipment, lamination device, trimming unit and winding equipment to complete mixing, feeding, extrusion, forming, trimming, Winding process. Among them, the extrusion equipment is the mai...

AI Technical Summary

Problems solved by technology

[0004] The applicant found that feeding the extruder through the hopper mainly feeds the extruder through the gravity of the material in the hopper, and the fluctuation of the feeding is small, so it is not suitable for a large change in the function of feeding the extruder in a short period of time. , cannot adapt to the requirements of fluctuations in molten resin production

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