RU2466024C1 - Furniture article, its separate element and method of their fabrication - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to production of furniture from readily available and cheap materials. Proposed method comprises cutting sections from cardboard shaped to article face shape and/or its cross-section, first grinding of its entire surface, applying glue on section surfaces uniformly on their entire surfaces and gluing all section together. Then produced workpiece is formed by acting female die on its face surface to carry out second grinding. Thereafter, fireproof coating is applied.

EFFECT: simplified process, higher efficiency.

10 cl, 1 dwg

Description

The invention relates to furniture production and can be used in the manufacture of furniture from generally available and cheap materials.

An analogue of the claimed method is “A method of manufacturing furniture and parts” described in the patent of the Russian Federation No. 2106250 C1, class. B29C 43/10, publ. 03/10/1998.

A known method for the manufacture of furniture and parts is carried out by laying cardboard or cardboard-like fibrous material in layers with a cold-curing adhesive between the layers. After applying glue, the cardboard in the form of a strip is wound with the formation of a hollow wound blank. Compressed by pressing and formed during the pressing operation. Then carry out the extraction from the mold with the removal of the core with the final curing with the formation of laminate shaped cases of furniture parts. Molding is carried out between the internal and external forming elements. Moreover, during the pressing operation, punching, creasing and / or supplying of the wound workpiece with a core, dowels, screw inserts, etc. are carried out. Before curing, spacers are installed, and they are attached with brackets and glued and sidewalls are mounted on the open ends of the wound workpiece, which is divided parallel to the axis of the wound workpiece into several parts and / or cuts forming a gap are made in them.

The disadvantages of this method are its complexity, the use of sophisticated and expensive equipment.

An analogue of the claimed products is a piece of furniture or furniture described in RF patent No. 2106250 C1, cl. B29C 43/10, publ. 03/10/1998 and consisting of a layered fibrous material impregnated with a binder. Moreover, the layers are pressed together. In addition, the furniture element consists of a wound blank or partially wound blank.

The disadvantages of the known products are their low strength and reliability during operation due to the density varying in volume due to uneven pressing.

The objective of the present invention is to remedy the above disadvantages.

The overall technical result consists in the simplicity and reliability of the method, the reduction in the production process of obtaining defective products and improving the quality of manufactured products.

The technical result is ensured by the fact that the method of manufacturing furniture and / or individual parts includes cutting profiles from cardboard having a shape corresponding to the end shape of the product and / or the shape of its cross section, first grinding the entire surface of the obtained profiles, applying glue to the surface of the profiles from it uniform distribution over almost their entire surface, bonding all profiles to each other. Next, the resulting workpiece is molded, including the action of the press punch on its end surface. A second grinding of the obtained molded billet is carried out, after which a fire retardant coating is applied.

In accordance with particular cases of execution, the method may have the following features.

After molding, quality control of the molded billet is carried out.

Perform cutting down profiles on a horizontal crucible press.

The preform is formed on a press having a punch weighing at least 50 kg.

Five-layer corrugated cardboard is used with a corrugation height of 1.1-4.5 mm and a corrugation pitch of 4.5-8 mm.

As glue use glue cold curing.

As a fire retardant coating, fire retardant varnish is used.

Grinding is carried out with a grinding sand.

Using the present method, it is possible to produce solid pieces of furniture and individual parts from which pieces of furniture are subsequently assembled.

The technical essence of the present invention is illustrated by the illustration, which shows a flowchart of a method of manufacturing furniture and / or parts.

The proposed method can be implemented on a partially automated line or manually. It depends on the dimensions of the manufactured products.

In the most general case, the method can be carried out as follows.

A five-layer corrugated cardboard, consisting of three flat (two outer and one inner) and two corrugated layers, is fed to a crucible horizontal press, on which profiles are cut from cardboard.

The resulting profiles have a shape corresponding to the end shape of the product and / or the shape of its cross section. Then carry out the first grinding of the entire surface (including the end surface) of the obtained profiles with a sandpaper. Apply glue (PVA) on the surface of the profiles with an indent from the edge of 20 mm. Glued profiles with each other. Next, molding (pressing) of the obtained preform is carried out, including the action of the press punch on its end surface. The molding time and the mass of the punch depend on the dimensions of the manufactured product. The minimum molding time is 10 hours and the minimum mass of the punch is 50 kg. It should be noted that the impact during molding on the entire surface of the profile provides better adhesion. As a result, all profiles are glued together, and the product has the same density throughout the volume.

After molding, quality control is carried out with the identification of defective blanks. If the molded workpiece does not contain defects, then carry out its second grinding with sandpaper, after which a fire-retardant coating is applied.

Example 1

For the manufacture of small items of furniture or individual parts that are used in the collection and design of furniture, use the manual method for their manufacture.

Corrugated cardboard profiles are cut down with the marking P-32VS on a horizontal crucible press. Manually grind with a grinding sandpaper edges and surface profiles. PVA glue is applied to each profile in a spiral and distributed over the surface by means of a roller. The glue is not applied to the indentation (20 mm) from the edge of the profile. The profiles are superimposed on one another and are moved relative to each other in a rotational-translational motion for better redistribution of glue.

The resulting multilayer preform is molded by pressing for at least 10 hours. The forming time depends on the dimensions of the product. Next, the molded product is installed on a flat surface and quality control is carried out, during which the assembly is checked for correctness and defects are analyzed.

After passing through quality control, the product is subjected to a second grinding and coated with fire retardant varnish, for example, STABITERM-107.

Example 2

The present method can be carried out using automated tools.

With the help of rollers from the roll, cardboard is fed into the crucible press. After cutting, the profiles are moved (using pushers) to an endless conveyor belt. Moving along the conveyor, the profiles are polished using ring-shaped endless grinding skins located perpendicular to the conveyor. The distance between the grinding skins and the conveyor is adjustable depending on the thickness of the cardboard.

Next, a roller is installed above the conveyor belt, which ensures the application of glue on the surface of the profiles. Then, using automated grippers, profiles with a layer of glue are stacked to obtain a workpiece, which is subsequently transported to the final molding. For large products, the molding time is more than 10 hours, and the weight of the punch exceeds 50 kg.

All subsequent operations are carried out using the methods described in Example 1.

Claims (10)

1. A method of manufacturing furniture and / or individual parts, including cutting profiles from cardboard having a shape corresponding to the end shape of the product and / or the shape of its cross section, first grinding the entire surface of the resulting profiles, applying glue to the surface of the profiles with a uniform distribution of over their entire surface, all profiles are glued together, then the resulting workpiece is molded, including the action of the press punch on its end surface, the second the lamination of the obtained molded billet, after which a fire-retardant coating is applied. 2. The method according to claim 1, characterized in that after molding, quality control of the molded workpiece is carried out. 3. The method according to claim 2, characterized in that the cutting profiles on a horizontal crucible press. 4. The method according to claim 3, characterized in that the molding of the preform is carried out on a press having a punch weighing at least 50 kg 5. The method according to claim 4, characterized in that they use five-layer corrugated cardboard with a height of corrugations of 1.1-4.5 mm and a pitch of corrugations of 4.5-8 mm. 6. The method according to claim 5, characterized in that as the glue use glue cold curing. 7. The method according to claim 6, characterized in that fire retardant varnish is used as a fire retardant coating. 8. The method according to claim 7, characterized in that the grinding is carried out by a grinding sand. 9. A piece of furniture made by the method according to any one of claims 1 to 8. 10. A separate part for the manufacture of furniture produced by the method according to any one of claims 1 to 8.

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