JPS6037765B2 - 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 horizontal V on a cabinet body material 2 to which a decorative thin film sheet 1 is pasted so that the body material 2 and the thin film sheet 1 can be bent at right angles. A V-shaped groove 3 is formed, an adhesive is applied to the gap V-shaped groove 3, and the thin film sheet 1 and the main body material 2 are bent to form the decorative portion 4 at one end and to form the box body. Two vertical V-shaped grooves 5 are formed in the cabinet body material 2, adhesive is applied to these vertical V-shaped grooves 5, and then bent at right angles to form a U-shape, and adhesive is applied to the bottom plate 6. The bottom plate 6 is fixed to the cabinet body material 2, and the cabinet box body 7 is assembled.
There is a way to form.

In this case, in the above-mentioned state, the overall strength is limited to only the adhesive strength of the adhesive applied to the V-shaped grooves 3 and 5 and the strength of the decorative thin film sheet 1. 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 the assembly parts, a bottom plate reinforcing bar 9, a back side reinforcing bar 10, and a reinforcing root 11 are used,
These are fixed to the cabinet box body 7 with adhesive to reinforce the cabinet box body 7, and the finished cabinet 12
I was getting . 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 integrally, 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 make a radius like Q on the outside of the end of the cabinet body material 16, and process the end face so that the ends can be butted together. A method of applying adhesive to the end faces to join them together, adhering the reinforcing pattern 17, and then pasting a decorative thin film sheet to the outer surface of the cabinet body material 16 with adhesive, as shown in FIG. 4. A method in which combs 20 are cut into the cabinet body material 19 to which the thin film sheet 18 is pasted, and then adhesive is applied to the two combs, the material is bent from the combs 20, and reinforcing roots 21 are glued to these parts for assembly; Cabinet body material 19 with decorative thin film sheet 18 pasted as shown in FIG.
A method has been put into practical use in which a groove 22 is formed in the cabinet body material 19, leaving the decorative thin film sheet 18, so that it can be bent into a specified semicircular shape, and reinforcing rods 23, 24, or 25 are adhesively fixed in this groove 22. However, in both cases, as in the case of Fig. 1, the number of assembly steps is extremely large and it takes a long time, and especially in the case of Fig. 2, the front decoration part 14 must be manufactured separately and joined together. This results in an additional cost increase. The present invention has been made in view of the above points.

The present invention is provided with a front decorative sheet that is larger inside than the end surface of the cabinet body material, and the front decorative sheet and the cabinet body material are housed and installed in a mold, and the decorative sheet is molded into the size of the cabinet body material in the mold. After cutting along the lines, a reactive resin is injected into the mold, and the reactive resin forms the internal parts support structure and the cabinet reinforcement, and the cabinet body material and the front decorative sheet are bonded together. It is fixed. An example of this will be described below with reference to FIGS. 6 to 10. 6th
Figures 8 to 8 show the configuration of a mold for realizing this manufacturing method, and Figures 9 and 10 show the cabinet before and after assembly, respectively. First, in FIG. 9, 18 is a decorative thin film sheet, 19 is a cabinet body material with this sheet 18 pasted on the outer surface, and grooves 22 are formed by leaving the decorative thin film sheet 18 at the folded part as in the case of FIG. 5. It will be done.

26 is a bottom plate, 27 is a front decorative sheet, and in this case, the inside thereof is wider than the sheet pasting surface of the cabinet body material 19.

In FIG. 6, 30 is a lower molding press mounting plate, 31 is a guide pin fixed to this lower molding press mounting plate 30', 32 is a guide post supported by this guide pin 31 in a vertically movable manner, It is urged upward by a spring 34.

Reference numeral 33 denotes an outer peripheral frame plate, which is fixed to the guide post 32.

Reference numeral 35 denotes an outer peripheral cutting blade fixed to the lower end of the outer peripheral frame plate 33, and has a cut piece storage portion 36.

Reference numeral 37 denotes an inner peripheral cutting blade, which has a cutting blade housing 36 like the outer peripheral cutting blade 35, and is also provided with a resin injection runner 38, and is fixed to the guide post 40'.

Reference numeral 39 denotes a guide pin that supports the guide post 40 in a vertically movable manner, and like the guide pin 31, it is fixed to the lower molding press mounting plate 3.

Further, 41 is an upper molding press mounting plate, 42 is a base block whose one end is fixed to this upper molding press mounting plate 41, 43, 44 are upper and lower ejector plates, 46, 4
6 is the above-mentioned Ejectaph.

One end is fixed to the upper and lower plates 43 and 44, a turn pin, an ejector pin, 47 is the base block 42.
An upper die base plate attached to the other end; 48 is a reinforcing rib and rounded corner forming block fixed to the upper die base plate 47; 49 is an attachment forming plate fixed to the block 48; It has an injection gate 50. The cabinet manufacturing process using this mold will be explained with reference to FIGS. 7 and 8.

As shown in FIG. 7a, when the upper mold and the lower mold are open, that is, the guide posts 32 and 40 are raised, and the lower mold press mounting plate 30 and the inner cutting blade 37 and the outer cutting blade 3 are connected to each other.
5, a front decorative sheet 27 shown in FIG. 9 is installed at a position corresponding to the front surface of the cabinet on the lower molding press mounting plate 30. Next, the cabinet body material 19 which has been grooved and has the decorative front surface 18 pasted thereon is fitted along the lower mold outer peripheral frame 33. Further, the descending plate 26 is also attached in the same manner. In this case, the cabinet body material 19 is tapered at the tip that supports the front decorative sheet 27, and the front decorative sheet 27 is tapered.
7 so that there is a gap between them. When the upper mold is closed with a press in this state, the parts mounting part 2 shown in FIG.
8 is lowered into contact with the inside of the cabinet body material 19 already installed.

That is, on the upper molding press mounting plate 41 and the ejector plate. By lowering the lower parts 43 and 44, the component mounting portion forming plate 49 is also lowered. Furthermore, when the upper mold is lowered, the IJ turn pin 45 is moved to the outer peripheral frame plate 3.
Although the return pin 45 is prevented from lowering further, the upper mold base plate 47 still descends, and the lower part of the upper mold base plate 47 and the upper part of the lower mold outer peripheral frame plate 33 come into contact with each other. When the bag is rolled, the lower mold outer peripheral frame plate 33 and the outer peripheral cutting blade 35, which had been pushed up by the spring 34 and the guide post 32, are simultaneously pushed down, as shown in FIG. 7b.
Similarly, the inner peripheral cutting blade 37, which had been pushed up by the spring 34 and the guide post 32, is also pushed down, and the upper and lower molds are completely closed as shown in the figure. At this time, as shown in FIG. 8, the front decorative sheet 27 is cut by the outer circumferential cutting blade 35 and the inner circumferential cutting blade 37 along the outer circumferential and inner circumferential surfaces necessary for the cabinet. The cut and unnecessary sheet pieces are stored in the storage section 3 of the cutting blades 35 and 37, respectively.
Enter 6. Cutting edge angle 8 of the inner and outer cutting blades 37 and 35
Cutting is possible at an acute angle of 45 degrees or less, but experimental results show that if the angle is less than 150 degrees, the lower molding press mounting plate 30 that directly receives the cutting blade is likely to be damaged, and the cutting blade may also be damaged. The blade is prone to breakage, chipping, etc.

Around 300 is the sharpest and has a long mold life.

In addition, the relationship between the hardness of the cutting blades 35 and 37 and the hardness of the lower die forming press mounting plate 30 is that the cutting blade has greater hardness, and the lower die forming press mounting plate 30 is made of a softer material. is necessary. Furthermore, the lengths of the cutting blades 35 and 37 are made longer than the cutting blade contact portion of the lower molding press mounting plate 30, so that the cutting blades 35 and 37 cut into the lower molding press mounting plate 3. As a result of experiments, it is preferable that the bite size is appropriately selected between 0.05 and 0.5 feet. After setting as described above, a reaction injection molding machine is used to inject reactive resin, such as POIJ, through the resin injection runner 38 and gate 50 of the mold.
One of urethane, polyester, epoxy, etc. is injected into the mold, and this reactive resin
A component attachment portion 28 and a corner reinforcement portion 29 shown in the figure are formed.

As a result, the front decorative sheet 27 and the bottom plate 26 can be adhesively fixed to the cabinet body material 19 at the same time using the reactive resin. In this case, cabinet body material 1
Since the tips of the cabinets 9 are tapered, the adhesion of the front decorative sheet 27 to the cabinet body material 19 can be ensured. According to this method, the size of the front decorative sheet 27 is made larger than the surface to which the cabinet body material 19 is attached, and when the front decorative sheet 27 and the cabinet body material 19 are stored and installed in the mold, the front decorative sheet 27 is attached to the cabinet. Since the main body material 19 is cut along the attachment surface, even if dimensional variations occur during installation, this can be reliably absorbed.

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 3000°C.
melted at 0, cooled and solidified after molding, while high pressure 4
Since injection molding is performed at a temperature of 00k9/yen or more, warping or deformation of the cabinet body material 27 occurs when the heat shrinkage of the resin or high pressure is released after molding. On this point, in reaction injection molding, two liquids or multiple liquids are mixed and solidified by a chemical reaction, and the injection injection pressure can be within 5 to 10k9/c because it is sufficient to inject at a pressure that can be injected into the mold. . In addition, the temperature is set to 40 oo to 5 mil, the temperature at which a chemical reaction occurs.
Since the temperature is 0°C, no warpage or deformation will occur after molding. Furthermore, 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.

The work process can be shortened.

In other words, it is possible to form the parts mounting part and the corner reinforcement part during injection molding, and at the same time, it is possible to adhesively fix the front decorative sheet and the bottom plate 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. In addition, the size of the front decorative sheet is made larger than the sheet pasting surface of the cabinet body material, and the front decorative sheet is cut to a predetermined size when installed in the mold.
Even if dimensional variations occur during installation, this can be reliably absorbed.

Furthermore, the cabinet can be manufactured in 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 furthermore, it is easy to automate the installation of parts to be later attached to the cabinet.

Furthermore, since the work process can be shortened, the number of workers can be reduced. Furthermore, since the injection pressure is low, there are no restrictions on the mold material, the structure is simple, and the thickness can be as small as 4 mm, making it possible to manufacture the mold at low cost.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the manufacturing process of a cabinet using the conventional folding method, Figure 2 is an exploded oblique view of a conventional semicircular folding corner cabinet, and Figures 3, 4, and 5 show the manufacturing process of a cabinet using the conventional folding method. Figures illustrating the manufacturing process of a semicircular corner cabinet with a kettle; Figures 6a and b are cross-sectional views and plan views of the mold used in the cabinet manufacturing method of the present invention; Figures 7a and b are views of the fabrication process of the present invention. 8 is a sectional view of the injected reactive resin, FIG. 9 is a perspective view of the cabinet of the present invention before manufacture, and FIG. 10 is the completed cabinet. FIG. 18... Decorative thin film sheet, 19... Cabinet body material, 22... Groove, 26... Bottom plate, 27... Front decorative sheet, 28... ...
・Parts mounting part, 29...Corner reinforcement part, 30...
...Lower molding press mounting plate, 35, 37... Cutting blade, 41... Upper molding press mounting plate, 45...
... Return pin, 47 ... Upper mold base plate,
48... Reinforcement lip and rounded corner forming block, 49... Parts mounting part forming plate. Figure 2 Figure 3 Figure 4 Figure 5 Figure 1 Figure 7 Figure 8 Figure 6 Figure 9 Figure 10

Claims (1)

[Claims] 1. When at least the cabinet body material and the front decorative sheet are housed and installed in a cabinet forming mold, and the upper mold of the mold is closed with a press machine, the outer peripheral cutting blade attached to the upper mold and the inner The front decorative sheet on the lower mold press mounting plate is cut by press pressure along the outer and inner circumferential surfaces necessary for the cabinet using the circumferential cutting blade, and then reactive resin is injected into the mold using a reaction injection molding machine. A method for producing a cabinet, characterized in that the reactive resin is injected to form a component attachment part and a corner reinforcing part, and the reactive resin is used to bond and fix the cabinet body material and a front decorative sheet. . 2. The cabinet according to claim 1, wherein the bottom plate is housed and installed in a mold together with the cabinet body material and the front decorative sheet, and the front decorative sheet and the bottom plate are adhesively fixed to the cabinet body material using a reactive resin. Production method.