Sandwich structure bamboo twined composite material product and manufacturing method thereof

Abstract

The invention discloses a sandwich structure bamboo twined composite material product, which comprises an inner enhancing layer, a sandwich layer, and an outer enhancing layer from inner to outer. Theinner enhancing layer and the outer enhancing layer are both a bamboo strip layer, which is composed of one or more layers formed by twining bamboo strips with resin. The sandwich layer is composed of one or more groups, which are formed by alternatively a circumferential bamboo strip layer and an axial bamboo strip layer. The circumferential bamboo strip layer is composed of multiple separated circumferential bamboo sections that are arranged along the axial direction of the sandwich structure bamboo twined composite material product; each circumferential bamboo section is formed by twininga bamboo strip with resin for 360 degrees or more; and the axial bamboo strip layer is formed by twining an axial bamboo strip curtain for 360 degrees or more on the circumferential bamboo strip layer, wherein the axial bamboo strip curtain is formed by parallelly arranging multiple rows of axially arranged bamboo strips with resin. The invention discloses a manufacturing method of the sandwich structure bamboo twined composite material product at the same time. The rigidness and strength of the product both meet the requirements. The overall moulding effect is good. The thickness is small. The twining period is short, and the efficiency is high. The method is suitable for manufacturing a bamboo twined composite material product with a large cross section. Moreover, the noise reducing function is enhanced.

Description

technical field [0001] The invention belongs to the technical field of bamboo winding molding, and more specifically relates to a bamboo winding composite material product with a sandwich structure and a manufacturing method thereof. Background technique [0002] Bamboo winding composite material is a new type of bio-based material that uses bamboo as a reinforcing material and thermosetting resin as an adhesive. Renewable, green and environmentally friendly, energy-saving and low-carbon, light and high-strength, corrosion-resistant, long service life, good thermal insulation performance, strong earthquake resistance and anti-settling ability, etc. The technical principle is to give full play to the axial tensile strength of bamboo, form a stress-free defect distribution in the product structure, and meet the strength requirements. Therefore, in the production process, the bamboo is cut into bamboo strips and formed by winding technology to ensure the mechanical strength of...

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Problems solved by technology

[0003] However, when bamboo strips are used to wind large cross-sectional area products such as pipe galleries, carriages, and houses, it will lead to excessive winding thickness, excessive strength, long winding cycle and low efficiency in order to meet sufficient rigidity and ensure the overall molding effect. Case

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