JPS6030266B2 - Laminating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for laminating a cosmetic film on the surface of a substrate such as a resin molded article.

Conventionally, when decorating the surface of plastic molded products, wood, pressed products, and other products made from wood, it is necessary to attach a decorative film to the surface, or
A decorative film is vacuum-formed into the surface shape of the base in advance using a mold, then inserted into the mold of an injection molding machine and then injected with resin. There were some products in which the molded film was inserted and formed into the shape of the mold using the pressure when injection molding the resin, making it tightly adhere to the resin.

However, this method had the disadvantage that only highly heat-resistant films could be used, and it could not be applied to some products. SUMMARY OF THE INVENTION An object of the present invention is to provide a laminating apparatus that eliminates the drawbacks of the conventional method, and will be described below with reference to drawings showing embodiments.

FIG. 1 shows and explains the film laminating machine and its processing steps.

In the film laminate molding process using this film laminate molding machine, first, a base plate 3 is installed in an upper molding tank 1 and a lower molding tank 2 that are opened as shown in A, and a substrate 4 on which the surface is to be decorated is placed on top of the base plate 3. do. Next, as shown in B, the decorative film sheet 5 is inserted so as to cover the entire upper part of the lower molding tank 2, the upper molding tank 1 is lowered, and the film sheet 5 is sandwiched between the lower and upper molding tanks. , 2 are sealed.

At that time, the film sheet 5 is heated by a film heating device (heater) 6 attached to the top surface of the upper molding tank 1,
It becomes soft and easy to shape (easily stretch). After sealing the molding tanks 1 and 2, the vacuum valves 7 and 8 of the upper and lower molding tanks are opened, and the vacuum pump 9 is used to open the upper and lower molding tanks 1 and 2.
Make a vacuum inside 2. Next, when the insides of the upper and lower molding tanks 1 and 2 are vacuumed, close the vacuum valve 7 connected to the upper molding tank 1 as shown in C, and close the compressed air valve 10 connected to the upper molding tank 1. It is opened and air is blown in by the compressed air machine 11.

Then, the film sheet 5 comes into close contact with the surface of the base 4 due to the pneumatic force, and is formed. At that time, the lower molding tank 2 is in a vacuum state. When forming is completely completed, close the vacuum valve 10 as shown in D, and close the vacuum valve 8.
is closed, the upper molding tank 4 is raised, and the base 4 whose surface is decorated by laminating the film sheet 5 is taken out.

According to such a film laminate molding method, it is possible to use various films such as films with low heat resistance, films with no compatibility, or metal foils that could not be used conventionally.

What is important in this case is to use a jig device that has a structure that perfectly fits the shape of the base to be decorated.
Below, we will produce stable film laminate decorations with good performance for structures that have internal air conditioning, structures that may deform or crack when compressed, or structures that have poor surface shape or wrinkle adhesion. A jig device that can be used will be explained in detail. If the film sheet 5 is to be laminated onto a small-sized base 4 with few internal cavities, it can be simply installed on the base plate 3, or a simple flat jig can be used to prevent cracking or deformation due to pneumatic force. However, in the case of a box-shaped product with a hollow interior as shown in Figure 2, or a complex-shaped product with grooves on the surface, simply installing it on the base plate 3 will not be enough to reduce the strength of the top surface. A good product could not be obtained due to deformation such as cracking at weak points, concave bending, or warping.

Therefore, as shown in Fig. 3, we used a receiver 12 shaped to compete with the inner wall of the box-shaped base 4, installed it on the base plate 3, and performed film laminate molding, which resulted in no cracking or deformation. Ta. However, the problem here is to carry out the transformation without causing incomplete adhesion or wrinkles at the tangential portion of the base plate 3 and the substrate 1.

Therefore, even if wrinkles occur in the lower part of this receiver 12, the base 4
A wrinkle-removal board 13 is attached so that the wrinkle-retaining board 13 comes out below the receiver 12 without remaining on the surface, and the wrinkle-retaining board 13 has a wrinkle smoothing part 14 at the lower part and a wrinkle absorbing part 15 at the corner part. It is characterized by its structure with 16 attached. As a result of experiments, it was found that the dimension A of the wrinkle smoothing portion 14 of the wrinkle erasing plate 16 is preferably between 5 and 1 mm, and the dimension B is approximately the same as the thickness C of the plate. Furthermore, in order to eliminate poor adhesion at the ends of the base 4, the outer circumference of the wrinkled residual plate 13 is made slightly smaller than the outer circumference of the base 14, as shown in FIG. Before and after was the best. In addition, in this receiver 12, the base 4 is installed and the film 5 is laminated as shown in FIG. 5 in the process shown in FIG. It is important that the plate 13 and the wrinkle-eliminating plate 16 can be easily released from the mold after molding, and it is preferable to use materials to which the adhesive applied to the film 5 can easily adhere.

For example, an AI plate can be used, and depending on the type of adhesive for the film 5, a resin plate, a metal plate, or other materials may be selected. Further, a template agent or a release tape (for example, Teflon tape, etc.) may be applied to the wrinkle erasing plate 16.
Then, the receiver 12, the wrinkle remaining board 13, and the wrinkle erasing board 1
By removing the base body 4 from the base body 6 and cutting off unnecessary portions of the film 5, a product in which the film 5 is laminated on the base body 4 without wrinkles can be obtained.

As described above, according to the present invention, it is possible to laminate any film such as heat-resistant and non-heat-resistant films to a substrate, and at the same time, the laminated portion adheres tightly to the substrate without causing wrinkles. This makes it possible to obtain a useful laminating device that can perform the following steps.

[Brief explanation of the drawing]

Figures 1A, B, C, and D are cross-sectional views showing the laminating process using a laminating apparatus in an embodiment of the present invention; Figure 2 is a partially cutaway perspective view of a substrate on which a film is laminated; Figure 3 is a partially cutaway perspective view of a substrate to be used. FIGS. 4A, B, and C are plan, side, and front views of the receiver, and FIGS. 5A, B are cross-sectional views showing the laminated state. 1, 2... Forming tank, 3... Base plate,
4...Base, 5...Film, 6...
Heating device, 7, 8, 10... Valve, 9...
...Vacuum pump, 11...Compressed air machine, 12...
Receiver, 13...Wrinkle remaining board, 16...Wrinkle erasing board. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A device for laminating a heated film onto a substrate by pneumatic force in a forming tank, comprising: a receiver that fits and supports the substrate; and a wrinkle-retaining plate that is slightly smaller than the outer periphery of the substrate and is provided at the bottom of the receiver. and a wrinkle-eliminating plate provided below the wrinkle-retaining plate and having wrinkle-absorbing portions at corner portions and wrinkle-stretching portions at other portions.