JPS6037764B2 - Cabinet manufacturing method - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for manufacturing a cabinet, and by adopting a reaction injection molding method, reinforcement with a reactive resin and adhesive assembly processing are performed at one time, thereby reducing the number of assembly steps. It is something to do.

As shown in FIG. 1, a conventional cabinet manufacturing method involves forming a V-shaped groove in a cabinet body material 2 to which a decorative thin film sheet is pasted so that the material 2 and the thin film sheet can be bent at right angles. 3, apply adhesive to this horizontal V-shaped groove 3, bend the thin film sheet 1 and the main body material 2, and form the front decoration part 4 at one end, as well as the cabinet main body material to form a box body. 2, two vertical V-shaped grooves 5 are formed, adhesive is applied to these vertical V-shaped grooves 5, and then bent at right angles to form a U-shape, and further adhesive is applied to the bottom plate 6. There is a method in which the bottom plate 6 is fixed to the cabinet body material 2 to form the cabinet box body 7.

In this case, the overall strength is only the adhesive strength of the adhesive applied to the V-shaped groove 3.5 and the strength of the decorative thin film sheet 1 in the condition in which it is left in the cabinet box body 7. If a heavy object is installed, the cabinet box body 7 will be destroyed. Therefore, as shown in the figure, a mounting plate 8 for attaching assembly parts, a bottom plate reinforcing branch 9, a back side reinforcing bar 10, and a reinforcing board 11 are used, and these are fixed to the cabinet box body 7 with adhesive. A completed cabinet 12 was obtained by reinforcing the cabinet. However, this assembly method can be easily manufactured if the bent corner part is square, but if the bent corner part is semicircular as shown in FIG. Since they cannot be manufactured in one piece, a method has been adopted in which the cabinet body 13 and the front decoration part 14 are formed separately and then joined together as shown in the figure.

As shown in FIG. 3, the method for manufacturing the cabinet body 13 in this case is to round the outer edge of the cabinet body material 16 like a bow, process the edges so that they can butt together, and A method is shown in FIG. 4, in which an adhesive is applied and the two are joined together, a reinforcing board 14 is adhered, and a decorative thin film sheet 15 is attached to the outer surface of the cabinet body material 16 with an adhesive. Cabinet body material 19 with decorative thin film sheet 18 pasted
A method is employed in which the combs 20 are cut, and then adhesive is applied to the combs 20 and the combs 20 are bent, and the combs 21 are glued to this part to make it rough, or a decorative thin film sheet 18 is pasted as shown in FIG. A groove 22 is formed in the cabinet body material 19 so that the attached cabinet body material 19 has a specified semicircular diameter, leaving the decorative thin film sheet 18. After bending the cabinet body 19, a groove 23 or 24 is formed in this groove
Alternatively, a method of gluing and fixing 25 reinforcing bars was put into practical use, but in either case, as in the case of Figure 1, the number of assembly steps was extremely large and it took a long time. Since the decoration part 14 must be manufactured separately and combined, the cost increases unnecessarily. The present invention has been made in view of the above points, and at the same time forms the mounting structure for attaching parts and the bending corner reinforcement part with liquid reactive resin, and at the same time fixes the front decoration part and the bottom plate to the cabinet body material. This reduces the number of scales and assembly man-hours, and reduces the number of cabinet component parts, making it possible to reduce costs.

One embodiment will be described below with reference to FIGS. 6 to 9.

First, as shown in FIG. 6, a decorative thin sheet 26 is placed on one side.
A cabinet body material 27 which can be bent into a substantially U-shape by cutting a plurality of bending parts 35 on the other surface, a bottom plate 28, and a front decorative sheet 29 are provided, and these are molded into a mold for reaction injection molding. It is housed and installed in the cavity 34 and the core 33 is closed. In this state, liquid reactive resin (e.g. polyurethane, epoxy, polyester, etc.) is placed inside the mold.
is injected using a reaction injection molding machine to form a mounting structure 30 for attaching internal parts near one end of the cabinet body material 27, and a bent corner reinforcement portion 31 is formed at a bent portion 36 of the cabinet body material 27. do. At the same time, the cabinet body material 27, the bottom plate 28, and the front decorative sheet 26 are bonded together by the injected reactive resin. In this case, the U-shaped end surface of the cabinet body material 27 that is in contact with the front decorative sheet 29 is formed into a tapered surface 32 so that the front decorative sheet 29 is adhered to the entire surface. Therefore, peeling of the front resin sheet 29 will not occur. In addition, the cabinet body material 27 and the bottom plate 2
8, either or both of the cabinet body material 27 and the bottom plate 28 may be tapered. Furthermore, the reaction injection molding method was adopted for the following reasons.

In general injection molding, the resin used is heated to a high temperature of 160°C to 300q.
C, and then cooled and solidified after molding, while high pressure 4
Since injection molding is performed at a weight of 0.00 kg/ or more, warping and deformation of the cabinet body material 27 occur when the heat shrinkage of the resin and high pressure are released after molding. On this point, in reaction injection molding, two liquids or multiple liquids are mixed and solidified through a chemical reaction, while injection can be performed at a pressure that can be injected into the mold, so the injection pressure can be within 5 to 10k9/c. .

Further, since the temperature may be 40q0 to 50qo at which chemical reactions occur, warpage and deformation do not occur after molding.
Further, by foaming the molding material, the amount of materials used can be reduced. As explained above, according to the manufacturing method of the present invention, the following effects can be obtained by manufacturing a cabinet using a reactive resin and a reaction injection molding method.

The work process can be shortened.

In other words, it is possible to form the component mounting structure and the cabinet reinforcement during injection molding, and at the same time, it is possible to adhesively fix at least the front decorative sheet to the cabinet body material.
It is possible to reduce the number of parts such as the front decoration part, and it is possible to manufacture the cabinet at low cost. Further, the cabinet can be manufactured using the same process regardless of whether the bent corner portion is square or semicircular.

Furthermore, since insert molding is performed within a mold, cabinets can be produced with high dimensional accuracy, and it is therefore easier to automate the installation of parts that will be later attached to the cabinet.

Furthermore, since the working process is shortened, the number of working personnel can be reduced. Furthermore, since the injection pressure is low, there are no restrictions on the mold material, and the structure can be simple, the thickness can be small, and the mold can be manufactured at low cost.

Furthermore, when bonding the front decorative sheet to the cabinet body material, the end face of the cabinet body material is tapered so that the adhesive (reactive resin) adheres to the entire surface of the front decorative sheet, so that after molding, the front decorative sheet There is no possibility that the sheet will peel off.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the manufacturing process of a cabinet using the conventional folding method. Fig. 2 is an exploded perspective view of a conventional semicircular folding corner cabinet, Figs. 3, 4, and 5 are diagrams showing the manufacturing process of the conventional semicircular folding corner cabinet, and Fig. 6 is a diagram showing the manufacturing process of the conventional semicircular folding corner cabinet. A perspective view of the cabinet manufacturing method before manufacturing; FIGS. 7 and 8 are sectional views of essential parts for explaining the manufacturing method, and FIG. 9 is a partially cutaway perspective view of the cabinet obtained by the present invention. It is. 26...
... Decorative thin film sheet, 27 ... Cabinet body material, 28 ... Bottom plate, 29 ... Front decoration sheet, 30 ... Mounting parts mounting structure section, 3
1...Bending corner reinforcement part, 32...
...Boopa side, 33...core, 34...capity,
35...Bending part. Figure 2 Figure 3 Figure 4 Figure 5 Figure 1 Figure 7 Figure 8 Figure 6 Figure 9

Claims (1)

[Claims] 1. At least, a cabinet body material that is bent into a substantially U-shape by cutting a plurality of bending portions on one side, and a front decorative sheet that is attached to one U-shaped end surface of this cabinet body material are housed and installed in a cabinet forming mold. , injecting a reactive resin into the mold using a reaction injection molding machine to form a mounting structure for attaching internal parts near one end of the cabinet body material, and forming a cabinet reinforcement part within the bent part; The reactive resin is used to bond and fix the cabinet body material and the front decorative sheet, and the U-shaped end surface of the cabinet body material that comes into contact with the front decorative sheet is processed into a tapered surface to form a tapered surface between the cabinet body material and the front decorative sheet. A method for manufacturing a cabinet comprising forming a gap into which the reactive resin enters.