JPH08276413A - Three-dimensional pattern formation method for architectural accessories - Google Patents

Abstract

(57) [Abstract] [Purpose] Three-dimensional decoration on an uncured molded body capable of pressure-transferring a deep three-dimensional decorative pattern by uniformly pressing each surface of the uncured plastic accessory molded body having a curved surface. A pattern forming method and a pressure molding machine therefor are provided. [Structure] Each surface of a flexible pressing die 8 held by an upper mold via a plurality of upper molds (upper molds of a pressure molding machine) 1a and 1b, which are equal in number to the surfaces of a molded body 3. , Uncured molding having a curved surface such as a building corner accessory by pressing the three-dimensional pattern of the pressing die onto each surface of the uncured molded body 3 having a curved surface from a direction substantially perpendicular to the uncured molded body It is possible to form a three-dimensional pattern having a deep uneven pattern on the body. The present invention can also be applied to an L-shaped accessory having no chamfered portion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a three-dimensional decorative pattern on a building accessory having a curved surface and a pressure molding machine therefor.

[0002]

2. Description of the Related Art A wide variety of products have been produced and used for building prefabricated members, and accessory building materials are one of them. The accessory has been manufactured by combining several plate materials by adhering them, and further by chamfering them if necessary.
Although such a manufacturing method was extremely non-industrial, recently, a hydraulic inorganic composition (cement-based, calcium silicate-based, gypsum-based, etc.) obtained by mixing and kneading reinforcing fibers, extenders, plasticizers, etc. With a screw extruder or the like, extrusion molding is continuously performed on the tray in a shape close to the cross-sectional shape of the final product. After cutting this to a fixed length, it is cured by steam curing and autoclave curing to obtain the final product. In the case of such an accessory as well, recently, there is an increasing desire to apply a three-dimensional decorative pattern on it, and various methods have been proposed to meet this demand. The general method is a method in which an uncured extruded product molding that has been cut to a standard size is loaded into a press die, and a three-dimensional decorative pattern is transferred by the press die or a die attached thereto. .

In Japanese Patent Application Laid-Open No. 61-160206, a three-dimensional decorative pattern is reversed so that a relatively uniform embossed pattern can be formed even when the patterning surface is not a single plane such as a ∧ molding type product. A method of applying pressure using a rubbery embossing mold is disclosed. However, in this method, the embossing mold is pressed only from one direction regardless of the shape of the accessory. Since pressure cannot be applied from a direction perpendicular to each surface of the molded body, it is impossible to form a pattern having a narrow width and a deep depth.

In Japanese Patent Laid-Open No. 2-227207, the pressure plate of the pressure molding machine is divided according to the number of faces of the accessory molded product, and each face of the molded product is applied from an orthogonal direction by an individual pressure plate. A method of pressing is disclosed. It is described that this method makes it possible to form a deep pattern on an uncured molded body by the pattern sheet attached to the pressure plate.
However, according to these methods, a chamfered portion has to be provided at the corner portion, and it is impossible to manufacture an accessory having an edge portion without the chamfered portion. That is, this method is characterized in that the upper part of the upper frame to which the pattern sheet is attached is rotatably pin-coupled to the centrally provided pressing portion. Therefore, in reality, a central pressing portion for pin-connecting the upper mold is indispensable. Therefore, it is unavoidable that a flat portion corresponding to the central pressing portion, that is, a chamfered portion is formed on the molded product.

[0005]

SUMMARY OF THE INVENTION The present invention is an uncured molding capable of pressure-transferring a deep three-dimensional decorative pattern by uniformly pressing each surface of an uncured plastic accessory molded article having a plurality of surfaces. An object of the present invention is to provide a method for forming a three-dimensional decorative pattern on a body and a pressure molding machine therefor.

[0006]

Means for Solving the Problems The present invention includes: 1) a step of placing an uncured plastic molded body having a curved surface on a lower frame of a pressure molding machine; and 2) the uncured plastic molded body. The flexible transfer die, which has a gentler angle than the angle of the bent portion and the angle of the bent portion can be changed by an external force, is slidably held by the pressing die holding portion provided on the upper mold. 3) a step of placing the die held by the upper mold on the uncured plastic molded body, 4) lowering the pressing arm to move each surface of the die through each upper mold. A step of pressing a three-dimensional decorative pattern onto the uncured molded body in a direction perpendicular to each surface of the uncured molded body, and 5) raising the pressing arm to uncured each surface of the die together with the upper frame. Step of releasing from each surface of the mold at right angles, and 6) lifting the upper mold and die, Body decorative pattern is a three-dimensional decorative pattern forming method step, the building won game surface made of taking out the uncured shaped body which has been transferred from the pressure molding machine.

Further, the present invention is a pressure molding machine for pressurizing a molded article having a curved surface, and an upper mold frame 1 composed of an arm portion and a pressing surface is rotated around a fulcrum 6 by the operation of a pressing arm 7. By doing so, the present invention relates to a pressure forming machine for forming a three-dimensional pattern, which is provided with a mechanism capable of pressing the inclined surface of the body to be pressed from the right angle direction. Furthermore, the present invention provides a flexible transfer die having a gentler angle than the angle of a bent portion in a molded article having a bent surface, and a flexible transfer die capable of changing the angle of the bent portion by an external force. The present invention relates to a pressure molding machine for forming a three-dimensional pattern, which has an upper mold frame provided with a pressing mold holding portion for movably holding it.

The present invention relates to an uncured molded product having a curved surface on each surface of a flexible die held by the upper mold via a plurality of upper molds equal in number to the surfaces of the molded body. It is characterized in that the three-dimensional pattern of the pressing die is transferred to the uncured molded body by pressing from each surface in a direction substantially at right angles. By this method, it is possible to evenly apply pressure to each surface of an uncured molded product that has a ∧-shaped curved surface that does not have a chamfered part such as a building corner accessory, and has a deep uneven pattern on the molded product. It is possible to form a three-dimensional pattern.

In order to apply pressure to the molded body having no such chamfered portion, the upper frame 1 comprises an arm portion and a pressing surface, which can rotate around the fulcrum 6 to pressurize the pressed body. . At this time, since displacement occurs between the upper mold and the pressing mold, if the pressing mold is stuck and fixed to the upper mold, peeling or breakage occurs in the pressing mold. In the pressure molding machine of the present invention, since the pressing die is slidably held by the holding portion of the upper mold, pressure molding can be performed without causing peeling or breakage of the pressing die. As a slidable holding method, for example, a method of sandwiching the widthwise end of the pressing die in a pressing die holding portion (9) having a U-shaped cross section of the upper die, or attaching a vacuum suction device to the upper die, There is a method of holding the pressing die with a weak suction force that is slidable.

The mold for flexible transfer of the present invention is made of natural rubber, synthetic rubber such as ethylene / propylene rubber, butadiene rubber, urethane rubber and the like, synthetic resin such as soft vinyl chloride and has a hardness of 50 to 95 degrees ( JIS / K6301 spring type hardness test) is used. Fifty
If it is softer than 100 degrees, it is difficult to give an embossed pattern.
If it is harder than 5 degrees, proper bending and stretching movements are difficult. The thickness of the die (thickness of the base excluding protrusions for pattern formation) is 2
It is possible to use one having a thickness of up to 20 mm, but it is preferably 3 to 10 mm. The depth of the three-dimensional pattern can be up to about 30 mm. The angle of the bent portion may be 5 to 80%, preferably 10 to 40% less than the angle of the final product. When mounting the uncured molded body on the lower mold of the pressure molding machine, it may be directly mounted, or may be mounted on a tray having an appropriate shape together with the tray, the latter. Is more convenient for work.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, an L-shaped corner accessory having a 90-degree corner portion is taken as an example of a building accessory having a bent portion, and a three-dimensional pattern forming method thereof will be described. The uncured molded product used was molded as follows. (1) Molding material 100 parts by weight of ordinary Portland cement, 60 parts by weight of silica stone, 60 parts by weight of perlite, 30 parts by weight of asbestos, 3 parts by weight of methyl cellulose Water proper amount (however, water has a plasticity capable of transferring a pattern in a pressing process, And add the amount adjusted so that the shape retention does not cause deformation such as sagging). (2) Mixing and kneading Sufficiently use a universal mixer. (3) Extrusion molding The kneaded product is put into a screw extruder, vacuum deaerated in the machine, and then discharged from a die having a cross-sectional shape of extrusion substantially equal to that of the product to be extrusion-molded on a mountain tray. .
The obtained molded body is cut into trays, and the trays are placed on the lower die of the press die. 5m thick as a flexible stamp
A urethane rubber having a m and a hardness of 80 degrees was used. The maximum depth of the three-dimensional pattern was 16 mm, and the corner opening angle was 120 °.

In FIGS. 1 and 2, 1a and 1b are upper molds, 2 is a lower mold, 3 is an uncured molded product, and 4 is a tray. The upper mold halves 1a and 1b and the pressing portions 5a and 5b can be rotated around the columns 6a and 6b penetrating them. That is, the upper mold frames 1a and 1b are fulcrum points 6a,
It can be opened and closed centering on 6b. On the lower surface of the upper molds 1a and 1b, a flexible integrated patterned die 8 is sandwiched between the insertion openings 9a and 9b at the ends of the upper molds 1a and 1b.

The unloaded state is as shown in FIG. 1. When the molding material 3 is placed on the lower mold 2 and pressed, the pressing portions 5a and 5b and the pressing arms 7a and 7b are respectively moved at predetermined speeds. By lowering, the upper molds 1a, 1b are closed and lowered, and if pressure is applied with a pressure of 5 to ²⁰ kgf / cm ² , the surface of the molded body 3 is pressed with a uniform pressure and a decorative pattern is attached. It is possible (state of FIG. 2). After the pressurization is completed, the pressing steps 5a, 5b and the pressing arms 7a, 7b are lifted at a speed adjusted so as not to damage the molded body 3 and the upper mold frames 1a, 1b are released from the mold, thereby completing the pressing process. .

In the present embodiment, the forming process of the L-shaped corner accessory having one curved surface is taken as an example, but the present invention is not limited to this, and two or more curved surfaces. It is also possible to perform a building accessory having a curved surface and a surface shape in an intermediate state from bending to bending. FIG. 3 shows an example of a semi-cylindrical shaped body as another example of the shape. Although asbestos-cement-based materials were used as the moldings in this embodiment, hydraulic materials such as calcium silicate-based materials and gypsum-based materials can also be used.

[Brief description of drawings]

FIG. 1 is an overall sectional view of a pressure molding machine of the present invention in a state where an uncured molded body to be pressed is placed on a lower mold.

FIG. 2 is a sectional view of the pressure molding machine of the present invention in a pressurized state.

FIG. 3 is a schematic view showing the shapes of an upper mold frame and a pressing mold for a semi-cylindrical molded body.

[Explanation of symbols]

 1 (1a, 1b) is an upper mold of the pressure molding machine, 2 is a lower mold of the pressure molding machine, 3 is an uncured molded body, 4 is a tray, 5 (5a, 5b) is a pressing portion, 6 (6a, 6b) is a fulcrum, 7 (7a, 7b) is a pressing arm, 8 is a flexible mold, and 9 is a mold holding part provided at the end of the upper mold.

Front page continuation (72) Inventor Hiroshi Matsumoto 14-5 Shimokita-cho, Neyagawa-shi, Osaka Kurashiki Spinning Co., Ltd.

Claims (3)

[Claims] 1. A method for forming a three-dimensional decorative pattern on the surface of a building accessory, which comprises the following steps: 1) An uncured plastic molding having a curved or curved surface (hereinafter referred to as a curved surface) is pressed under a pressure molding machine. Step of placing on a frame, 2) a bent portion which has a gentler angle than an angle or a curvature (hereinafter referred to as an angle) of a bent or curved portion (hereinafter referred to as a bent portion) in the uncured plastic molded body A step of slidably holding a flexible transfer die whose angle can be changed by an external force in a die holding part provided on the upper die, 3) the die held by the upper die Step of placing on the uncured plastic molded body, 4) By pushing down the pressing arm, each surface of the above-mentioned die is pressed from the direction perpendicular to each surface of the uncured molded body through each upper mold, and uncured. Step of transferring the three-dimensional decorative pattern to the molded body, 5) Raise the pressing arm Thereby releasing the respective surfaces of the die together with the upper mold from the respective surfaces of the uncured molded body at a right angle, and 6) lifting the upper mold and the die, and the uncured molded body to which the three-dimensional decorative pattern is transferred. Process of taking out from the pressure molding machine. 2. A pressure molding machine for pressurizing a molded article having a curved surface, and an upper mold frame 1 comprising an arm portion and a pressing surface.
However, the pressure molding machine for forming a three-dimensional pattern is provided with a mechanism capable of pressing the inclined surface of the body to be pressed from a right angle direction by rotating around the fulcrum 6 by the operation of the pressing arm 7. 3. A flexible transfer die having a gentler angle than the angle of the bent portion in a molded article having a bent surface and capable of changing the angle of the bent portion by an external force, and a sliding die for this die. 3. The pressure molding machine for forming a three-dimensional pattern according to claim 2, further comprising: an upper frame provided with a pressing die holding portion for movably holding the die.