Natural-fiber composite material pelletizer

Abstract

The invention relates to a natural-fiber composite material pelletizer which comprises a material barrel and more than one heating unit, wherein the material barrel is connected with the first heating unit by a material feeding rack; after the first heating unit is connected with other heating units in series via a transmission belt, the last heating unit is connected with a molding unit via the transmission belt; the output end of the molding unit is connected with another heating unit, a cooling unit, a twisting unit and a material cutting unit in series in an orderly manner via the transmission belt; the bottoms of each heating unit and the molding unit are respectively provided with a pneumatic plant; and each heating unit, the molding unit, the cooling unit, the twisting unit and the material cutting unit are arranged on a frame and controlled by a control unit. As more than one heating unit and one molding unit are used for heating and molding natural-fiber composite strips, the invention solves the problems of difficult material feeding during extrusion molding and difficult dispersion in resin. The invention can be widely used for pelletization in various natural-fiber composite material fields.

Description

technical field [0001] The invention relates to a natural fiber granulation equipment, in particular to a natural fiber composite material granulator used in the field of composite materials. Background technique [0002] In recent years, natural fiber composites have become a new field of composites research, which has the potential to replace glass fiber reinforced composites. First of all, natural fiber is a product from nature, which is renewable and degradable. Compared with glass fiber, it is a more environmentally friendly material than glass fiber; secondly, natural fiber has higher strength, and its specific strength is that of glass fiber. 50% to 80%, but the specific modulus of natural fibers is higher than that of glass fibers, so using natural fibers to prepare composite materials can also obtain higher mechanical properties. In addition, natural fibers also have the advantages of low cost and low density. [0003] For fiber-reinforced composite materials, whe...

AI Technical Summary

Problems solved by technology

However, when natural fibers are used instead of glass fibers to prepare composite materials, the preparation process of glass fiber reinforced composite materials cannot be simply copied. The problems are: first, when natural fibers are used as reinforcement materials for extrusion molding materials, there are The problem of difficulty in adding and uneven dispersion is due to the fact that natural fibers are relatively fluffy, and when used in the extrusion process, the fibers cannot enter the screw smoothly and smoothly, and there are difficulties in feeding and metering; secondly, natural fibers are highly polar, and usually The matrix resins used as reinforcing materials (such as polyethylene, polypropylene, polyvinyl chloride, etc.) are non-polar or low-polar, and the difference in polarity between the two makes it difficult for the fibers to be fully dispersed in the resin, resulting in The fibers in composite materials are mostly distributed on the surface, which is extremely uneven, not only difficult to process, but also unable to achieve the purpose of reinforcement

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