JPH0538796A - Vacuum laminating method - Google Patents

Abstract

PURPOSE:To conduct laminating, in which a decorative sheet is positioned positively along the shape of an irregular pattern to a substrate having the irregular pattern on a surface. CONSTITUTION:A substrate 11 having permeability is placed onto the mount 5 of a table 2 with a large number of pinholes 4, and a decorative sheet 13 softened through prepheating is superposed onto the substrate 11. When the decorative sheet 13 is heated under the sate in which the inside of the table 2 is evacuated and the decorative sheet 13 is sucked on the surface of the substrate 11, the decorative sheet 13 is softened sufficiently, and fast stuck positively in the shape of an irregular pattern by evacuation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum laminating method capable of faithfully adhering a decorative sheet made of a synthetic resin on the surface of a substrate which is the original form of a product along the shape of the substrate surface.

[0002]

2. Description of the Related Art A vacuum laminating method has been proposed as a conventional method for laminating a decorative sheet of a synthetic resin, which has been colored or printed, on the surface of a substrate which is a prototype of a product.

In this vacuum laminating method, a substrate is placed on a placing table having a large number of small holes, and the decorative sheet is vacuum-sucked from the lower portion of the placing table while the decorative sheet is placed on the substrate. The sheet is pressed and heated from the surface through a rubber sheet, and the decorative sheet is brought into close contact with the substrate by softening, pressing and vacuum suction.

[0004]

By the way, in the above-mentioned conventional laminating method, since the decorative sheet is pressurized and heated through the rubber sheet, the thermal efficiency is poor, and the vacuum suction force is effectively applied between the substrate and the decorative sheet. It is difficult to make it work, and therefore, if the surface of the substrate has a pattern surface such as fine unevenness, deep unevenness, angular unevenness, it is impossible to align the decorative sheet with this pattern surface exactly. There's a problem.

In order to solve the above-mentioned problems, it is an object of the present invention to provide a vacuum laminating method capable of surely aligning a decorative sheet along the shape of a pattern surface.

[0006]

In order to solve the above-mentioned problems, the present invention places a breathable substrate and a decorative sheet overlapping the substrate on a mounting table having a large number of small holes. Then, while the decorative sheet is softened by preheating, the decorative sheet is sucked onto the surface of the substrate using the air permeability of the substrate by vacuum suction from the bottom of the mounting table, and the decorative sheet is heated in this vacuum suction state. This is the method adopted.

[0007]

Operation: A breathable substrate is placed on the mounting table, and the decorative sheet softened by preheating is vacuum-sucked from the lower portion of the mounting table while being stacked on the substrate.

Since the substrate has air permeability, the decorative sheet is directly sucked and adheres to the substrate by vacuum suction, and when the decorative sheet is heated in this vacuum suction state, the decorative sheet is softened and the vacuum suction causes the substrate to move. It is easy to conform to the surface shape, and therefore, when the surface of the substrate is patterned, the decorative sheet can be surely conformed to this pattern shape.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a vacuum laminating apparatus,
A hollow table 2 arranged inside the support 1 makes it possible to draw the table 2 forward from the top of the support 1. The inside of the table 2 is connected via a pipe 3 to a vacuum source, and the upper part is The mounting table 5 has a large number of small holes 4.

A heating mechanism 7 which is supported by a rail 6 fixed to the support base 1 and moves above the table 2 located on the support base 1 is arranged above the support base 1.

The substrate 11 to be placed on the table 5 of the table 2 is the original shape of the product, and is made of a material having air permeability, such as particle board, fiber board, various kinds of wood, etc. It becomes a three-dimensional shape and becomes parts of various building materials and furniture.

The decorative sheet 13 laminated on the substrate 11 is made of a thermoplastic synthetic resin such as vinyl chloride resin and is printed with various colors and patterns.

In the case of FIGS. 2 and 3, the decorative sheet 13 is an example in which a vinyl chloride sheet is laminated on the substrate 11 via the adhesive agent 14. For example, a printed layer is formed on one side of the thermoplastic base sheet. A decorative sheet of a type in which a hot melt layer is provided, the base sheet is peeled off after lamination, and the printing layer is transferred to the surface of the substrate may be used.

The heating mechanism 7 is for heating and softening the decorative sheet 13 placed on the base material 11, using hot air, a heater, a burner or the like as a heat source, and partially decorating the decorative sheet 13. The heating position is moved to a high temperature while moving to a high temperature, and the hot air supply pipe 9 is connected to the nozzle 8 so as to pressurize the decorative sheet 13 at the time of heating, and hot air is supplied from the lower portion of the nozzle 8 to the surface of the decorative sheet 13. May be sprayed on.

As a means for pressurizing the surface of the decorative sheet 13, the table 2 may be covered with a hood to pressurize the inside of the hood to a high pressure and move the heating mechanism inside the hood. Good.

Next, a vacuum laminating method will be described. The substrate 11 is placed on the placing table 5 of the table 2 pulled out from the front of the supporting table 1, and the decorative sheet 13 which is larger in plan than the substrate 11 is superposed on the substrate 11 in a softened state by preheating, and the table 2 is returned on the support 1.

When the decorative sheet 13 is a vinyl chloride resin, the preheating temperature is, for example, about 50 ° C. This preheating may be performed before stacking it on the substrate 11, but it may also be carried out by heating it with a heater after stacking it on the substrate 11 and returning the table 2 to the support base 1.

When the table 2 is fed onto the support 1, the suction mechanism is operated to suck the inside of the table 2 by vacuum. By this vacuum suction, the substrate 11 stacked on the small hole 4 is sucked, and since the substrate 11 has air permeability, a suction force is generated on the surface of the substrate 11 to suck the decorative sheet 13 and the decorative sheet 13 Since is softened by preheating, it is adsorbed on the surface of the substrate 11 by a suction force.

When the suction force acts in a softened state due to preheating, the decorative sheet 13 adheres closely to the surface shape of the substrate 11 and also follows the shape of the uneven pattern 12 formed on the substrate 11. Since the preheating of the decorative sheet 13 is limited by the limit temperature of the synthetic resin and cannot be heated to a high temperature, it is difficult to sufficiently soften the decorative sheet 3 only by preheating. In the case where the pattern is deep or has an angular portion, the decorative sheet 13 cannot be sufficiently aligned with the shape of the pattern 12.

Therefore, while maintaining the vacuum suction, the heating mechanism 7 directly applies a high temperature to the decorative sheet 13 to sufficiently soften the decorative sheet 13 and bring it into close contact with the pattern 12 along the shape thereof.

The heating of the decoration sheet 13 by the heating mechanism 7 heats a part of the decoration sheet 13 to a high temperature for a short time, and gradually moves the heating portion by the movement of the heating mechanism 7 to heat the entire decoration sheet 13. To do.

When a high temperature is directly applied to the decorative sheet 13,
By moving the heating mechanism 7 at an appropriate speed, the decorative sheet 13 can be partially and instantaneously heated, and thus a temperature much higher than the melting temperature of the synthetic resin sheet can be applied, for example, 300 ° C. to 400 ° C. It becomes possible to apply a high temperature of ° C.

The portion of the decorative sheet 13 to which such a high temperature is applied is partially softened and adheres to the surface of the substrate 11 by the vacuum suction force, and the shape of the pattern 12 is surely followed. The decorative sheet 13 conforms to the shape of the pattern 12 even in a deep portion or a corner portion.

As described above, for the decorative sheet 13,
When vacuum suction from the bottom and high temperature heating directly from the top are given,
It is adsorbed on the surface of the substrate 11 in a sufficiently softened state, and as shown in FIG. 3, it is possible to surely perform the lamination along the shape of the pattern 12.

The direct high temperature heating of the decorative sheet 13 is
Although it is performed by a heater or hot air, the pressure may be applied at the same time as heating, and the decorative sheet 13 may be rapidly cooled after heating to solidify the laminated state of the substrate 11. The product is fixed with the adhesive 14.

After the lamination, the heating mechanism 7 may be stopped, the vacuum of the table 2 may be released, the table 2 may be pulled out in front of the support 1, and the product may be taken out.

[0028]

As described above, according to the present invention, the decorative sheet is superposed on the air-permeable substrate, the decorative sheet is preheated, and then the decorative sheet is vacuum-sucked from the lower part of the substrate and the decorative sheet is heated. As a result, the decoration sheet can be sufficiently softened, the decoration sheet can be surely adsorbed to the surface of the substrate, and when the surface of the substrate has an uneven pattern, the decoration sheet can be The laminated product can be adhered so as to follow the shape of this pattern, and a high-quality laminated product with a clear pattern can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a laminating apparatus used in a vacuum laminating method of the present invention.

FIG. 2 is an enlarged vertical sectional view of the main part of the above.

[Fig. 3] Enlarged sectional view of a laminated product

[Explanation of symbols]

 2 table 4 small hole 5 mounting table 7 heating mechanism 11 substrate 12 pattern 13 decorative sheet

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Claims (1)

[Claims] 1. A breathable substrate and a decorative sheet overlapping the substrate are placed on a placing table having a large number of small holes,
While softening the decorative sheet by preheating, vacuum suction from the bottom of the mounting table to adsorb the decorative sheet on the surface of the substrate using the air permeability of the substrate, and heat the decorative sheet in this vacuum suction state A vacuum laminating method characterized by: