Novel plant fiber extruder

Abstract

The invention discloses a novel plant fiber extruder. The novel plant fiber extruder comprises an extrusion head and a die cavity formed by templates, wherein the extrusion head performs reciprocating movement in a stroke cavity of the die cavity, and the die cavity sequentially comprises the stroke cavity, an extrusion cavity, a forming coating cavity and a heating solidification cavity. The extruder used in the production is provided with strengthening ribs, a waterproof surface layer is coated on the outer surface, an uncoursed vertical structure is provided, and efficient heating and drying can be realized; the extruded plant fiber products have high strength and uncoursed vertical structures, and are smooth in surfaces and good in water resistance; moreover, a waterproof surface solution can moisten products during production, and the micro-wave heating drying is uniform and quick in heating, so that the production efficiency greatly improved.

Description

technical field [0001] The invention relates to the field of extruders, in particular to a novel plant fiber extruder, which can be used to produce extruders with reinforcing ribs inside, waterproof surface coating on the outer surface, no layering in the longitudinal structure, and high-efficiency heating and drying. Background technique [0002] my country is a large agricultural country, and there are as many as 700 million tons of crop straws every year. Because there is no suitable way to convert them into economic benefits, most of them are incinerated, which has brought extremely serious environmental pollution problems. At the same time, there is a serious shortage of timber resources in our country. In recent years, through continuous exploration, researchers have developed plant fiber extrusion products such as boards, wood cubes, columns, and pipes by extrusion to replace the consumption of timber resources. [0003] This type of product has excellent characterist...

AI Technical Summary

Problems solved by technology

[0003] This type of product has excellent characteristics such as low density, strong impact resistance, heat insulation, light weight and sound absorption, and high flatness. However, the products produced by conventionally used extruders also have many defects.

1. The strength of plant fiber extruded products is low, especially the longitudinal strength is worse, which cannot be compared with wood and concrete products, and cannot be vigorously promoted; In the process, there is only longitudinal pressure exerted by the extrusion head, and the extruded product has a longitudinal structure layered and uneven density; 3. The outer surface of the product body is rough and does not have waterproof performance. If it encounters a humid environment, it is easy to deform and has a long service life. Discount; 4. The product is heated and dried in the mold cavity. Generally, the heating function is provided by the hot pressing plate, but the heat transferred by the hot pressing plate is gradually exhausted from the outer circumference of the mold cavity to the center, and the heat is uneven, resulting in the extruded product being in the molding process. The heating is not uniform, and the temperature of the hot pressing plate cannot be too high, otherwise the glue will be pre-cured before extrusion molding, which will affect the strength of the product. Therefore, the heating of the hot pressing plate alone is slow and the production efficiency cannot be improved.

The above quality problems have seriously affected and restricted the popularization and application of extruded products.

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