RU2258448C2 - Method for manufacture of furniture piece - Google Patents

Abstract

FIELD: production of furniture, in particular, lining of furniture parts.

SUBSTANCE: method involves processing one and the same furniture piece, with one parts of said furniture piece being provided by post-forming process including preliminary heating of film or formable plastic and connecting it with surfaces of part and curved end, while providing other furniture pieces by soft-forming process including laminating covering of parts at both sides and lining curved end with melamine edge.

EFFECT: substantially reduced manufacture costs, improved appearance, increased reliability and service life.

2 cl, 2 dwg

Description

The invention relates to the production of furniture, namely to its lining, combining two technologies in one product: softforming and postforming.

The term "postforming" is used for the process of lining parts from a particleboard, or MDF (medium density board) at the same time its sheets and edges rounded along a special profile, for example, in the form of an L- or U-shaped profile, with special decorative, for example, paper-laminated plastic, with the ability to form when heated or film.

The term "softforming" means the process of coating parts on both sides and the process of lining the edges of the product.

Currently, domestic and foreign furniture and woodworking industries are increasingly producing such furniture products as tables, furniture facades, window sills, wall panels, etc., lined with plastic using postforming technology. Products made using this technology are more durable than products made using standard technology, when the face and edge are faced separately, in accordance with softforming technology.

There is a well-known collection of furniture of the FOCUS series, Italy - Catalog "World of Office Furniture" TPK "Felix", 2001, the design of the details of the tables of which involves finishing with PVC film by hot forming using postforming technology.

In the furniture collection "TAZIO MASTER", Italy, furniture details are veneered with softforming technology.

The disadvantage of both collections of furniture is their high cost.

Postforming technology allows, regardless of the complexity of the configuration of furniture parts, to perform their facing on the front side without joints, however, this technology is more expensive than softforming technology. Therefore, in the manufacture of such a piece of furniture as, for example, a table, the more expensive postforming technology can be used to make its tabletops, and the less expensive softforming technology can be used to make its legs. It should be noted that the countertop, as a rule, is subjected to more intensive use and wears out faster, losing its appearance, and the use of postforming technology will significantly improve the appearance and increase its service life.

In addition, such a technology for the manufacture of a piece of furniture will make it possible to achieve ecological purity of the product without increasing its cost.

The closest analogue of the method in which the manufacture of furniture is used for facing parts of a piece of furniture is the method according to the USSR copyright certificate No. 1637754, class. A 47 B 13/08, 1991. However, the known method does not allow to reduce the cost of manufacturing furniture and increase its reliability and durability.

The objective of the invention is to reduce the cost of manufacturing furniture, improve its appearance, increase reliability and durability.

The specified technical result is achieved due to the fact that in the method of manufacturing a piece of furniture, including lining parts, at least one part is performed by postforming technology, which consists in preheating the film or molded plastic and connecting them to the part on surfaces and a curved end, and at least one other part is performed by softforming technology, which consists in a laminated coating of the part on both sides and facing the curved end with a melamine edge.

In the manufacture of parts using postforming technology, decorative paper-layered plastics are used as the forming plastic, having the ability to bend to the required radius when heated, and PVC film as the film, the film being made with a protective layer.

As a piece of furniture, in the manufacture of which the proposed method is used, a table is taken, the table top of which is made with lining using postforming technology, and the legs are made with lining using softforming technology.

Figure 1 shows the edge fragment of the panel countertops, lined with postforming technology, figure 2 is a detail made by softforming technology.

A piece of furniture, for example in the form of a table, consists of countertops, legs and possibly other details. The table cover - the table top - is made of MDF board in the form of a panel 1 with a thickness of 38 mm and is lined, for example, with a 0.5 mm thick PVC film 2 using postforming technology, which consists in preheating the film and connecting it adhesively with the panel 1 on the upper front surface 3, end 4 and partially lower back surface 5.

Each table leg is made, for example, of a chipboard plate in the form of a panel 6 with a thickness of 38 mm, having a high-quality laminated coating 8 on both sides, resistant to mechanical, thermal and chemical influences. The end face of the 7 panel is lined with a melamine edge, in the necessary places the ends of the laminated chipboard are milled according to a special profile and glued with a melamine edge using softforming technology.

As a facing material in the manufacture of parts by the "postforming" method, molded decorative paper-layered plastics are also used, which, when heated, can bend to the required radius and maintain it when cooling. The minimum bending radius of the plastic is 10 times its thickness.

Plastics have high performance properties: heat and water resistant, resistant to chemicals and abrasion. Therefore, they are suitable for lining elements of almost all types of furniture operated under conditions of high physical and mechanical stress: these are kitchen furniture, bathroom furniture, laboratory furniture, office furniture, etc.

Decorative plastics are divided into:

- high pressure plastics (HPL - High Pressure Laminate) - short-cycle production method;

- low pressure plastics (CPL) - a continuous production method;

- polyester plastics.

High-pressure plastics possess the highest level of properties and the greatest variety of decorative appearance, are made using melamine resins for impregnation of the upper layers and phenolic resins for impregnation of the inner layers, as well as with the addition of elastic modifiers to ensure the suitability of sheet plastics for molding.

Low-pressure plastics are produced in the form of a single continuous tape on tape presses, which allows you to cut sheets of any length. Rolled decorative paper-laminated plastics are made using only modified resins that provide high processability in postforming processing. In general, rolled plastics are inferior to sheet ones in physical and mechanical indicators, especially in terms of resistance to water vapor.

Polyester plastics are made from special papers and polyester resins. They are inferior in quality to plastics based on melamine resins.

Depending on the properties, the use of these plastics in furniture production is determined. So, in the production of office furniture, CPL (roll) plastics are used wider than sheet (HPL) plastics, which is largely due to waste reduction when cutting the required format. When facing the working surfaces of kitchen furniture, and especially commercial equipment, sheet plastics dominate. For the decoration of facades using the "postforming" method, both rolled and sheet plastics are equally used.

The proposed solution uses the technological process of lining furniture parts in membrane presses.

The main material for lining parts in membrane presses are PVC films. The advantage of these films is a huge variety of colors and high performance properties. They stretch well, which allows them to be faced with a variety of configurations of furniture details. The film thickness is in the range of 0.3-0.5 mm.

MDF boards are used as the basis for the details of a piece of furniture, since they lend themselves well to milling and in milled areas, for example along the edges and ends of countertops, retain a finely porous and smooth surface, which helps to prevent tearing of the film in these areas.

The technological process consists of the following operations:

1. Milling blanks from MDF boards.

2. Grinding these blanks.

3. Application to their surface by spraying glue.

4. Plywood blanks in a membrane press.

In the process of veneering, a PVC film is applied to the milled part. The part with the film is fed into the press. Warming up the film lasts about 1 min, during which the film softens and becomes elastic. Next, the worktop part is clamped in the press and the vacuum is turned on.

The rubber membrane of the press covers the workpiece and presses the film to it. The glue is polymerized. The exposure time in the press is 2-3 minutes.

This technology allows you to perform parts without joints on the front side of the surface, regardless of the complexity of configurations of parts and their design solutions.

Furniture details lined with PVC films have high performance properties, have a perfect appearance and are the most promising in furniture manufacturing technology.

Claims (2)

1. A method of manufacturing a piece of furniture, including lining parts, characterized in that at least one part is performed by postforming technology, which consists in preheating the film or molded plastic and connecting them to the part on the upper front surface, curved end and partially rear surface, and at least one other part is performed according to softforming technology, which consists in a laminated coating of the part on both sides and facing the curved end of the melamine edge th. 2. The method according to claim 1, characterized in that in the manufacture of parts by postforming technology, decorative paper-laminated plastics are used as the forming plastic, having the ability to bend to the required radius when heated, and a PVC film as the film, the film being made with a protective layer.

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