JPH0132772B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention covers a cut decorative surface with a sheet to cover decorative board materials, pulp cement boards, gypsum slab boards, asbestos silicic acid The present invention relates to the disclosure of a continuous molding method for a decorative board material that effectively compensates for the impact resistance, bending strength characteristics, etc. of a board material such as a calcium board material, and has particularly good surface characteristics as a decorative material.

[Conventional technology] Conventional gypsum board, pulp cement board,
Board materials such as gypsum slab boards and asbestos calcium silicate boards are generally colored or patterned using base paper as a decorative surface, but as a decorative material, they are flat and are not comparable. It was considered monotonous.

[Problem to be solved by the invention] In view of the recent cosmetic defects in board materials, the board surface is cut to create an uneven pattern,
Attempts have been made to avoid the decorative surface from becoming flat and to create a decorative surface with a three-dimensional sense of mass, but due to the material characteristics unique to these boards, there are various inconveniences. It is contained within.

Particularly in the case of gypsum board materials, where the base paper is partially or completely removed during surface cutting, the impact resistance of the board surface is extremely poor, and the bending strength and tensile strength are also poor. It was considered extremely vulnerable.

Such inconveniences have become so obvious that the difference in unevenness is strengthened in other board materials for the purpose of enhancing their decorative function, and synthesis by laminating reinforcing boards is often required. be.

Furthermore, such use of plywood significantly increases the manufacturing cost of the decorative board, and also causes the board material to become thicker and heavier, resulting in various other inconveniences in use and construction.

Furthermore, in the case of gypsum board with the cut surface exposed as it is, the surface wall will collapse due to dryness or humidity, vibration, etc., making the durability particularly poor. This resulted in the production of crushed powder, etc., and the scattering of the crushed powder.

[Means for Solving the Problems] The present invention has been devised especially in view of the disadvantages of decorative boards in the prior art, and it improves the board surface, which has been made brittle by cutting, to have excellent tensile strength and impact resistance. In order to provide a decorative board with good decorative properties, that is, good color tone, light selection, and patterning, while eliminating the disadvantages of the previous example, the present invention has been particularly developed. The purpose is to disclose a lamination method that matches the characteristics of board materials.

Accordingly, in the present invention, in order to achieve the above object, the lamination method for the decorative board includes a step of applying an adhesive to one side of a heat-softening sheet, and a step of applying heat to the surface of the adhesive-applied sheet. After blowing the wind, the sheet is sequentially supplied onto the surface of a guide provided on the side where the adhesive is not attached, and by a suction means having a vacuum hole opened in the surface of this guide, The step of molding the sheet into a concavo-convex pattern that matches the guide shape provided on the guide surface, and applying the adhesive surface of the sheet onto a board surface having a concavo-convex pattern matching the concavo-convex pattern of the sheet provided with this molding. This method is based on the process of attaching the sheet as a bonding surface.

[Example] A typical example showing detailed drawings of the present invention will be described below. 1 is a film made of a thermoplastic resin such as vinyl chloride or impregnated with a resin having similar properties to the thermoplastic resin. These sheets are made of impregnated paper with thermal softening properties, and are continuously fed one after another from supply rolls 2-2.

In the illustrated example, a laminating machine 3 for the sheets 1 is interposed, but such a laminating machine 3 is not necessarily required, but is installed as needed, and depending on the case. It is also planned that sheet 1 and plain paper will be pasted together.

Reference numeral 4 denotes a slitter device which is designed to feed the supply sheet 1 in a fixed width or fixed length at any time.

An adhesive 6 is applied to one side of the thus supplied sheet 1, especially the end surface that does not come into sliding contact with the guide plate 5, and an attached roll 7 and a doctor roll 8 which also serves as a kneader are placed in front of the guide plate 5. The guide rolls 9 to 9 are used to sequentially guide and supply the adhesive 6 onto the guide plate 5 while pasting the coated sheet 1 thereon.

The adhesive mentioned above is generally expected to be a water-soluble adhesive such as ethylene vinyl acetate, acrylic vinyl acetate, epoxy adhesive, or urethane adhesive.
It is contemplated that other adhesives may be used depending on the adhesive purpose, without necessarily being limited to these.

Next, the guide plate 5 is provided with grooves 5a extending in the feeding direction of the sheet 1, and the grooves 5a are provided especially at the leading edge of the sheet 1 in order to naturally guide and shape the sheet 1. widened and shallow groove 5
a, the groove 5a becomes gradually deeper and narrower toward the rear end of the sheet 1 being fed, and a hose is connected to a separate air vacuum device for the purpose of ensuring the guidance and shaping of the sheet 1. The vacuum hole 10a in the groove 5a is opened at the front of the groove 5a where the sheet 1 is fed.

Adhesive 6 is applied to the guide plate 5 having such a configuration.
While sequentially supplying the sheets 1 coated with
The sheet 1, which has been thermally softened by the pressure of the supplied air A, is pressed into the grooves 5a and molded, and this molding is made to become progressively deeper and narrower depending on the shape of the grooves 5a. It is.

In addition, the molding on the guide plate 5 in the above description corresponds to the cut uneven surface of the board 11 which is supplied separately, and various shapes are planned to match the cut uneven surface of the board 11 that is intended for this purpose. Various forms are planned, such as cases in which the grooves 5a are not specified but are formed as convex stripes, cases in which they are formed in a curved pattern, cases in which they are formed in a continuous or discontinuous pattern, etc. It is something that

Next, the sheet 1, which has been continuously shaped using heated air A and a vacuum device, is applied to the cutting surface of the board 11 via the guide roll 12 in a state where the adhesive 6 is properly dried by the heated air A. It is supplied and laminated.

Further, the guide plate 5 described above is designed to curve the front and back of the sheet 1 in the direction opposite to the direction in which the heated air A is blown for the purpose of shaping the sheet 1 by smoothly and continuously feeding it.

Note that this guide roll 12 is a roll with a concave-convex shape that matches the patterned concave-convex pattern on the guide plate 5 so as not to destroy the patterned surface such as corrugation on the sheet 1 produced with the guide plate 5. be.

Next, the board 11 supplied to the adhesive surface of the sheet 1 is a gypsum board, a gypsum slab board, an asbestos calcium silicate board, or a pulp cement board, and is made into a decorative surface by cutting grooves 11a on the surface to be laminated. Therefore, the groove 11a is always provided with a cut surface having another uneven shape.

In the case of the groove 11a, the groove 11a has a groove shape that matches the groove 5a at the trailing end of the sheet feeding end of the guide plate 5.

Furthermore, it goes without saying that when the groove 11a in the board 11 is constructed as a concave stepped shape on the side, use of a laminate of reinforcing boards is separately planned for creating the deep groove 11a.

Therefore, when the board material to be supplied is particularly gypsum board, there are cases in which some of the surface base paper of the gypsum board is left as shown in the illustrated example, and cases in which all of this is removed. In either case, the surface hardening treatment of the cut end surface is performed by infiltrating and adhering cold-curable resin emulsion, etc., and applying adhesive 13 such as water-soluble ethylene vinyl acetate, acrylic vinyl acetate, epoxy system, urethane system, etc. The material was then supplied to the joint surface with the sheet 1.

The laminating device for supplying sheet 1 and board 11 first has basic heating rolls 14 to 14 to heat and press the sheet 1 to board 11, and also has auxiliary rolls 15 to 15. The molded sheet 1 is successively pushed into the groove 11a and bonded under heat and pressure.

The auxiliary rolls 15 to 15 are installed in multiple stages, and the diameter of the rolls is gradually increased and widened toward the final direction depending on the front position of the laminate, and the supply sheet 1 is gradually expanded. The sheet 1 can be reliably brought into close contact with the grooves 11a by being heated and pressed into the shape of the grooves 11a without any difficulty.

Furthermore, during heating by the auxiliary rolls 15 to 15, heating air B is planned to be supplied under pressure from above the surface of the sheet 1 to be laminated.

[Effects of the Invention] The present invention has the characteristic configuration described above,
It is possible to easily, reliably, and quickly laminate a single sheet material to the cut surface of a board with particularly fragile surface characteristics, and it is particularly possible to mass-produce surface processing for this type of decorative board. This is what I did.

In addition, in the method described above, the sheet 1 material used is stretched naturally and extremely quickly, and there is no difficulty in joining it to the board 11, and there is no possibility of the sheet being damaged or melted during lamination, or the sheet material after lamination. This eliminates all accidents such as curing and tearing, and since the sheet 1 is always attached with sufficient tension using guide rolls, etc., there is no occurrence of twists, wrinkles, etc. on the laminate surface. This makes it possible to create a smooth laminate surface.

Using the special method described above, the present invention effectively compensates for the reduced surface characteristics of a cut board, and aims to provide an inexpensive decorative board with an excellent external shape and sufficient impact resistance and bending strength. It is something.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing a typical embodiment of the present invention, FIG. 2 is a side view of the same essential parts, and FIG.
The figure is a side sectional view of the guide plate, Fig. 4 is a front view of the main part, Fig. 5 is a perspective view of the main part, Fig. 6 is a perspective view of the main part showing sheet molding, and Fig. 7 is a lamination of the sheet. Fig. 8 is a sectional view of the main part showing heat-compression bonding using a hot roll, and Figs. 9 to 12 are
The figure shows a cross-sectional view of a main part showing heat-pressing using an auxiliary roll. In the figure, 1... sheet, 2... supply roll, 3... pasting machine, 4... slitter device, 5... guide plate, 6
…adhesive, 7…applied roll, 8…doctor roll,
9...Guide roll, 10...Hose, 11...Gypsum board, 12...Guide roll, 13...Adhesive, 14
. . . heat roll, 15 . . . auxiliary roll.

Claims (1)

[Claims] 1. A step of applying an adhesive to one side of a heat-softening sheet, and after blowing hot air to the surface of the adhesive-applied sheet, a step of applying an adhesive to one side of the sheet to which the adhesive is not applied. The sheet is sequentially fed onto the surface of the guide provided, and the sheet is shaped into an uneven shape that matches the shape of the guide provided on the guide surface by a suction means having a vacuum hole opened in the surface of the guide. and a step of pasting the sheet onto a board surface having an uneven pattern matching the uneven pattern of the sheet to be molded, using the adhesive surface of the sheet as a bonding surface. How the board is manufactured. 2. The method for manufacturing a decorative board according to claim 1, wherein the thermosoftening sheet is a thermoplastic resin film. 3. The method for manufacturing a decorative board according to claim 1, wherein the thermosoftening sheet is a paper impregnated with a thermoplastic resin. 4. The method of manufacturing a decorative board according to claim 1, wherein the guide shape provided on the guide surface is gradually strengthened from the front end of sheet supply toward the rear end of sheet supply. 5. The method for manufacturing a decorative board according to claim 1, wherein the guide shape provided on the guide surface is a groove or a protrusion provided in the sheet feeding direction. 6. The method of manufacturing a decorative board according to claim 1, wherein the groove in the guide surface is gradually made deeper and narrower from the front end of the sheet supply toward the rear end. 7. The method for manufacturing a decorative board according to claim 1, wherein the suction means provided on the guide surface is a vacuum hole opened in the guide surface.