RU2294843C2 - Method of producing wood articles with amber incrustation - Google Patents

Abstract

FIELD: wood working.

SUBSTANCE: method comprises cutting elements in the article by means of a laser. The amber members are set into the cut elements with a spaced relation to the cut wall. The space between the amber member and wall of the cut elements is filled with a polymeric compound. After the solidification of the compound, the surface is coated with a primer composition, grinded, and lacquered.

EFFECT: improved method.

3 cl

Description

The invention relates to arts and crafts and can be used in the manufacture of wood products with inlaid amber, such as furniture, interior details, parquet floors, caskets, board games, etc.

The amber inlay technique was first used in the 16th century in Koenigsberg in the manufacture of chessboards. In the XVII-XVIII centuries, amber inlay techniques were used in the manufacture of furniture. Also, this technique was used in the manufacture of the famous "amber room", in particular in the manufacture of background panels. To do this, pieces of amber were cut into plates, which were then glued to a wooden base with organic glue. To give amber a more varied color scheme, it was stained with sea purpura, goat fat [E. Frakei. Amber. M .: "World", 1990, pp. 50-55, 63-64].

However, over time, all the exhibits that have survived to this day, which used the inlay technique using amber plates, had to be restored several times, because the plates fell off, their surface was covered with cracks and changed color due to the oxidation of amber.

A known method of inlaid with amber, including cutting a nest in a wooden base, crushing amber to obtain crumbs with different sizes of granules, placing amber crumbs in nests, impregnating amber crumbs with a liquid composition based on epoxy resin and machining to obtain a common surface [RF Patent No. 2227098] .

However, this method does not allow to reveal all the richness of the color of amber, inlay has a faded "plastic" look, because Amber is crushed and impregnated with epoxy resin having a high coefficient of light absorption.

A known method of manufacturing wood products with inlay, adopted as a prototype, including drying wood to achieve a certain moisture content, preparing the surface of the product, making shaped wood inserts and arranging them in accordance with a given sketch of the product, filling the free space between the inserts with pieces of amber of various fractions, pouring the surface of the product with polyester resin, grinding the product, refilling with varnish and final polishing [RF Patent No. 2152878].

However, the known method does not allow to obtain high-quality products, because due to different thermal expansion of amber and wood, as well as impregnation with a polyester resin, the hardness coefficient of which is higher than the hardness coefficient of wood, over time leads to cracking and swelling of the surface of the product, the formation of cracks.

When creating the invention, the problem of creating highly artistic products with a long service life was solved.

The problem is solved due to the fact that in the known method of manufacturing wood products with inlaid with amber, including the preliminary preparation of wood and amber, their joint arrangement in accordance with the sketch of the product and the impregnation of amber with polymer resins, according to the invention, amber of different fractions and colors is made plates and in accordance with the sketch elements are cut out of them, and in a wooden base fragments are cut through, the shape of which corresponds to amber elements, with the perimeter of each the burgundy fragment should be greater than the perimeter of the corresponding amber element by an amount that provides a gap between the amber element and the wooden base, then, in accordance with the sketch, the product is assembled, for which purpose amber elements are placed in the wooden base instead of cut fragments, the gap is filled with a polymer compound , which includes polyester resins whose hardness is lower than the hardness of wood, accelerators and plasticizer.

Preliminary manufacture of amber plates reveals all the richness and beauty of natural stone. Coating the surface of the plates with a primer prevents amber from subsequent oxidation. The location of the amber elements with a gap relative to the wooden base and filling the gap with a polymer compound allows you to get a reliable monolithic connection. In this case, the compound simultaneously acts as a “shock absorber” between amber and wood, which have different linear expansion coefficients.

A method of manufacturing wood products with amber inlay is as follows.

Pre-carry out the preparation of wood and amber. To do this, the tree and amber are dried to obtain the same humidity. Plates are made from amber, for which a layer of amber pieces of a certain color range and fractions are impregnated with amber varnish, and after curing, the surface of the obtained plate is primed on both sides with a composition based on polyester resins having a low gelation rate and a low curing rate. In this case, the primer composition fills all available voids and pores in amber and between pieces of amber, protecting it from oxidation. Then the plate is ground to obtain a thickness equal to the thickness of the product. Elements are cut out from amber plates of different colors and fractions in accordance with the sketch of the product using laser equipment. Similarly, in accordance with a sketch in a wooden base using laser equipment, fragments are cut through, the shape of which corresponds to amber elements. In this case, the perimeter of the wooden fragment must be greater than the perimeter of the amber element by an amount that subsequently ensures during assembly the gap of 0.15-0.20 mm between the amber element and the wooden base. The connection of the wooden base with amber elements is carried out with a difference in their moisture content of not more than ± 1% and a temperature difference of not more than ± 2 ° C. For this, a wooden base is fixed face down on the forming table and amber elements with a gap of 0.15-0.20 mm are inserted face down into the place of the cut fragments. The gap between the amber elements and the wooden base is filled with a polymer compound, which includes polyester and acrylic resins, the hardness coefficient of which is lower than the hardness of the tree, accelerators and plasticizer. After curing the compound, the product is turned over, the entire surface of the product is coated with a primer, finally sanded and varnished.

Claims (4)

1. A method of manufacturing wood products with amber inlay, including preliminary preparation of wood and amber, their joint arrangement in accordance with the product sketch and amber impregnation with polymer resins, characterized in that plates are made from amber of different fractions and colors in accordance with the sketch elements are cut out of them, and fragments are cut out through the wooden base, the shape of which corresponds to amber elements, and the perimeter of each wooden fragment should be larger than the perimeter, respectively of the existing amber element by an amount providing a gap between the amber element and the wooden base, then, in accordance with the sketch, the product is assembled, for which amber elements are placed with a gap in the wooden base instead of cut fragments, the gap is filled with a polymer compound, which includes polyester resins, the hardness coefficient of which is lower than the hardness coefficient of wood, accelerators and plasticizer. 2. A method of manufacturing wood products with amber inlay according to claim 1, characterized in that the amber plates are obtained by impregnating an amber layer of a certain fraction and color scheme with amber varnish, after which the surface of the plate is primed on both sides with a composition based on polyester resins and ground. 3. A method of manufacturing wood products with amber inlay according to claim 1, characterized in that the wooden base with amber elements is assembled with a moisture difference of not more than ± 1% and a temperature difference of not more than ± 2 ° C. 4. A method of manufacturing wood products with amber inlay according to claim 1, characterized in that the gap between the amber elements and the wooden base is 0.15-0.20 mm.