JPS5849376B2 - Manufacturing method of vinyl chloride overlay decorative plywood - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a vinyl chloride overlay decorative plywood for overlaying a vinyl chloride resin film on a decorative plywood in a short time.

Conventionally, when manufacturing overlay decorative plywood using vinyl chloride resin film, the laminating method or heat pressing method has been adopted as a method for overlaying the decorative plywood with the vinyl chloride resin film, but the falling method has not been adopted. However, it was not possible to increase productivity enough to put it into practical use, nor was it aesthetically pleasing.

In other words, in the lamination method, a vinyl chloride resin film is overlaid while the decorative plywood passes between two rolls installed above and below, so the working method is extremely simple and efficient, but the pressure is high. The linear pressure was weak, and it was not possible to continue pressing for a certain period of time, resulting in insufficient adhesive strength of the film and defects in the film not penetrating into the grain of the decorative plywood.

On the other hand, the heat pressing method is a method of heat pressing the vinyl chloride resin film using a press hot platen, and the sufficient pressure solves problems such as adhesion, but the hot platen is cooled during the working time. However, since it takes about 60 minutes, the work efficiency is poor and it is almost impossible to run it on the production line for continuous production.

The present inventor eliminates the above-mentioned defects in the conventional manufacturing method of vinyl chloride overlay decorative plywood, and provides a method for efficiently manufacturing vinyl chloride overlay decorative plywood with sufficient adhesive strength and excellent surface appearance. The present invention has been arrived at as a result of various studies aimed at achieving this goal.

That is, the present invention relates to a method for manufacturing overlay decorative plywood in which a vinyl chloride resin film is overlaid on the surface of decorative plywood. Vinyl chloride overlay decorative plywood, characterized in that an ultra-thin metal hot plate with wires sandwiched inside is placed, and the entire vinyl chloride resin film is fused to the decorative plywood by pressurizing the entire hot plate from the upper surface of the hot plate. The present invention relates to a manufacturing method.

Next, the method of the present invention will be explained in detail.

In the present invention, a hot plate used for overlaying a vinyl chloride resin film on the surface of decorative plywood is constructed as shown in FIG.

In the drawing, 1 is a hot plate made of copper, aluminum, stainless steel, etc., and the hot plate 1 is an ultra-thin metal plate A made by sandwiching a hard insulating material (not shown) with a nichrome wire 2 fixed by 1 over the entire surface. and B (each thickness is 0.3 to LO mm).

).

Further, a thermocouple 7 connected to a temperature indicating controller 6 by a lead wire 3 is inserted into the hot plate 1.

Further, the nichrome wire 2 is connected to a relay 5 by a lead wire 4, and the relay 5 is further connected to a temperature indicating controller 6 to control the temperature of the hot plate 1.

In order to overlay a vinyl chloride resin film on decorative plywood by the method of the present invention, as shown in FIG. , cushion board 10,
This is done by placing the hot plates 1 one after another in this order, applying pressure from above with a press platen, and clamping with the upper and lower platens.

As the cushion plate 10 and the mirror plate 11, those conventionally used for this type of use can be used, but from the purpose of the present invention, it is preferable to use ones that are as thin as possible.

As the cushion board, heat-resistant rubber or plastic sheet, kraft paper, or the like is used.

As the mirror plate, a stainless steel plate, an aluminum alloy plate, etc. are used.

PVC resin is a thermoplastic resin, and due to its poor thermal conductivity, which is characteristic of plastics, if it comes into contact with a hot plate, only the contact surface will melt, and a film of the desired thickness will not be laminated. If there is a cushion plate between the plate and the mirror plate, heat is transferred gently and uniformly, so the above-mentioned drawbacks can be avoided.

In the case of the present invention, since the hot plate is an ultra-thin metal hot plate with a nichrome wire interposed therebetween, the heating of the hot plate tends to be uneven, but this is made uniform by the cushion plate.

Furthermore, when force is applied through the cushion plate, the force is uniformly applied to the film, resulting in a clean finished surface.

The function of the cushion board placed under the decorative plywood is almost the same as that of the conventional cushion board.

Examples will be explained below.

Example: 0 acrylic acid ester resin emulsion was applied to the surface of the base plate.
．． 3 ~ 0.5 g/ct? Apply it to a temperature of 80 to 10
Prepare decorative plywood by drying at 0°C for 2 to 3 minutes.

Next, as shown in FIG. 2, a layer of thickness 0.2~
0. A 3 mm vinyl chloride resin film 9 is applied, a mirror plate 11 is placed on top of it, and this is placed on a cushion plate 10.
, clamping pressure 5-8 kg/cr? t temperature 1
It is pressed with a hot plate 1 under forceful heat under conditions of 40 to 160°C.

Next, the pressing device was disassembled and the decorative plywood was taken out, and a vinyl chloride overlay decorative plywood with good adhesion was obtained.

In addition, it is desirable to lower the temperature of the hot plate 1 to a temperature that does not interfere with the work for the next work, and for this purpose, water cooling plates are installed on the upper and lower surface plates to actively lower the temperature. is preferred.

As described above, in the present invention, as a result of overlaying a vinyl chloride resin film on the surface of decorative plywood using the hot plate 1, it only takes 25 seconds to raise the temperature of the hot plate 1 to 150°C.
In addition, it took only 40 seconds to lower the temperature of the hot plate from 1500C to room temperature by using a water cooling plate, indicating that it was heated instantly and was also cooled extremely quickly. ing.

Therefore, according to the method of manufacturing vinyl chloride overlay decorative plywood of the present invention, a product with sufficient adhesion and beautiful appearance can be obtained in one cycle of 3 minutes, improving work efficiency and reducing manufacturing costs by shortening the overlay process. It can be measured.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a hot plate used in the present invention, as well as a plan view of a temperature indicating controller and a relay, and FIG. 2 is a sectional view showing an embodiment of the present invention. 1... Hot plate, A, B... Ultra thin metal plate,
3, 4...Lead wire, 5...Relay,
6... Temperature indicator controller, 7... Thermocouple, 8... Decorative plywood, 9... Hinyl chloride resin film, 10...・Cushion board, 111
1... Mirror plate.

Claims (1)

[Claims] 1. In a method for manufacturing overlay decorative plywood in which a vinyl chloride resin film is overlaid on the surface of decorative plywood,
A vinyl chloride resin film is placed on the decorative plywood, a mirror plate is placed on top of the vinyl chloride resin film, and an ultra-thin metal hot plate with a nichrome wire sandwiched inside is placed on top of it via a cushion plate. A method for manufacturing vinyl chloride overlay decorative plywood, which comprises applying pressure to the entire surface of the hot plate to fuse the vinyl chloride resin film to the decorative plywood.