SU914319A1 - Method of producing hollow articles of wood-adhesive composition - Google Patents

Description

The invention relates to methods for manufacturing products from a mixture of chopped wood with a binder and can be used in the manufacture of body products in the furniture and woodworking industry, as well as in the production of building materials.

A known method of manufacturing hollow articles from wood-adhesive composition, including the formation of the carpet, its pressing with the simultaneous molding of the product on the substrate and piezo-thermal processing [1].

However, the known method does not provide the strength of the product, since when the carpet is pressed and the product is molded simultaneously, the density over the section of the product is different.

The aim of the invention is to increase the strength of the product.

This goal is achieved by the fact Ngo according to the method of manufacturing Bare wood-glue products

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composition, comprising forming a carpet, its pressing and forming an article on a substrate pezotermoobra Botko, the processes of pressing and forms Bani are separated, the pres ⁵ popping mat is carried out before the odds movaniem to obtain a preform, having a · rail thickness of the finished product, and then the workpiece is crimped with two sides, and the further formation of the billet with the emanation of the finished product is carried out in the pressed condition.

FIG. 1 shows schematically the pressing of a carpet; in fig. 2 - spray · forged carpet preparation; in fig. 3 "crimping the workpiece; in fig. 4 - preparation of the blank for molding; on fit. 5 "molding products.

From the wood-adhesive composition ₂₀ form the carpet 1, which is first pressed in a cold state under uniaxial pressure between the flat plates 2 to obtain a blank 3, having a thickness, and therefore

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the density of the finished product. The specific pressure during pressing is 80-120 kg / cm ^, and the dwell time under pressure is 10 s.

After that, the resulting billet 3, located on the substrate 4, is compressed by the element 5 from two sides and mounted on the matrix of the contour mold 6. When the punch 7 moves down, the billet together with the substrate is bent and falls into the gap between the matrix and the punch products are compressed at a pressure of 5 * 15 kg / media mold temperature 150-160 C.

Duration of pressing 0.5 *

1 min per 1 mm thickness of the finished product.

The proposed method for the manufacture of hollow products from wood-adhesive composition can improve the quality of the finished product.

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Claims (1)

Claim A method of manufacturing hollow articles from wood-adhesive composition, 5, which includes forming the carpet, pressing it and molding the product on a substrate with piezo-thermal processing, characterized in that, in order to increase the strength of the product, <0, the pressing and molding processes are carried out separately, while pressing the carpet is carried out before the finished product, then 15, the blank is compressed from two sides, and the further formation of the blank with obtaining the finished product is carried out in a compressed state.