JPS62152807A - Embossed patterning method of extrusion molded shape - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for enforcing a pattern on an extrusion molded product, and particularly relates to a method for enforcing a pattern on an extrusion molded product, and particularly relates to a method for enforcing a pattern on an extrusion molded product, and in particular, a method for applying an enphos pattern to an extrusion molded product, and in particular, a method for applying an enphos pattern to an extrusion molded product, and in particular, a method for enforcing a pattern on an extrusion molded product. The embossed patterning of extruded products is related to the method.

<Prior Art> Extrusion molded products made from inorganic materials such as those described above are used as architectural components for construction of buildings such as houses and stores, such as exterior wall materials, gables, shingles, and valve boards.

It is widely used as picture frames, hats, or baseboards.

This type of extrusion molded product allows for continuous extrusion of hollow or irregular-shaped objects that cannot be produced using other manufacturing methods, and can be extruded into a wide variety of shapes or made into cylinders simply by replacing the die of the extrusion molding machine. For example, when asbestos cement is used, a mixture of asbestos 1 and cement is plasticized by adding water, etc., and then extrusion molding is performed. It is made by curing and solidifying an extruded product in au-1-crepe.

<Problem to be solved by the invention> By the way, in recent years, as building materials have become more and more expensive to handle and have undergone multiple additions, the simple, flat appearance has been declining, and the surface of these building materials has In terms of designs, there is an increasing social need for three-dimensional geometric embossed patterns and naturally occurring amorphous embossed patterns, but when performing this type of embossed patterning, generally unsolidified embossed patterns extruded in the extrusion direction are used. Immediately after extrusion molding, the smooth surface of the molded product is processed with an embossed jig that creates the desired uneven pattern on the surface facing the molded product.
A method is used in which the molded product is pressed perpendicularly to the extrusion direction with a pressure that does not deform the molded product. However, even in the uncured state immediately after molding, the extrusion molded product has poor flexibility and is difficult to physically deform plastically. It is extremely difficult to clearly apply an embossed pattern to the surface of a molded product. In particular, when trying to create a deep and sharp embossed pattern, sharp corners on the jig cannot be accurately transferred, resulting in rounded parts. There is a problem in that only some unclear patterns can be formed. In particular, in the case of extrusion molded products whose base side is material 1 made of a mixture of pulp etc.
This tendency is significant because the fibers present in the surface layer of the molded product make it more difficult to deform plastically.

<Means for Solving the Problems> In view of the above problems, the manufacturing method of the present invention is such that a large number of The gist of this method is to form a large number of needle holes with a hole-drilling jig on which needle-like protrusions are formed, and then pressurize the surface of the extruded product with the jig to form an embossed pattern.

The above-mentioned hole-drilling jig may be, for example, one in which a large number of needle-like protrusions are formed on the surface of a flat substrate, or one in which a large number of needle-like protrusions are formed on the outer peripheral surface of a roll-like substrate. As will be described later, a hole-drilling jig made of a roll-shaped substrate is preferable from the viewpoint of efficiently imparting plasticity suitable for pressure forming of an embossed pattern to the surface layer of the extruded product. . When a hole-drilling jig made of a flat substrate is used, for example, this jig is sequentially pressed or pressure-tightened onto the surface of the molded product from a direction perpendicular to the extrusion direction.
In the case of a jig using a roll-shaped substrate, for example, a method may be used in which the jig is rotated in the same direction as the extrusion direction of the molded product to continuously press or pressurize the surface of the molded product.

In addition, the needle-like protrusions formed on the hole-drilling jig are not necessarily limited to conical shapes. The length may be as long as the depth is the same or slightly deeper than the depth of the embossed pattern that will be applied to the surface layer in the next step, for example, a needle-like part formed integrally with the base of the jig. Alternatively, it may be a shield fixed to the surface of the jig or a needle-shaped material embedded in the surface of the jig.

The size and gap of the needle-like protrusions may be appropriately determined depending on the shape of the extruded product and the area and degree of unevenness of the enphos pattern.

Furthermore, the part of the extruded product to be pretreated with the hole-drilling jig may be the surface layer of the molded product where the embossed pattern will be applied in the next step, or the surface layer and the periphery of the surface layer, and it is not necessary to cover the entire surface of the extruded product. It goes without saying that no pretreatment is required.

<Function> As in the above method, by forming a large number of needle holes in the surface layer of an unsolidified extruded product immediately after molding using a hole punching jig having a plurality of needle-like protrusions, the same surface layer is formed. This loosens and softens the molded product, giving the surface layer of the molded product a plasticity suitable for forming a clear embossed pattern under pressure in the next step.

First, if a roll-shaped substrate is used as a hole-drilling jig, the needle holes formed on the entire surface of the extruded product will not be simply needle-shaped, but will rotate as the jig rotates. Since the cross-section has an abbreviated shape elongated in the direction, plasticity can be imparted to the surface layer of the extruded product very effectively and efficiently.

<Example> Embodiments will be described below with reference to the accompanying drawings.

14mm thick and 225mm wide, used for building exterior walls
In order to create a geometric pattern on the surface of the narrow outer wall board for straightening after fiber-reinforced calcium silicate extrusion molding, a kneaded material for extrusion molding having a conventionally known composition was extruded using a known method using an extrusion molding machine. . Thereafter, as shown in FIG. 3 (8), a base diameter of 0.5
A metal needle-shaped protrusion 3 with a length of ~2 mm and a length of 2 to 4 mm,
A large number of drilling jigs 4 arranged in a lattice or staggered manner at intervals of 3 to -6 mm are used, and the drilling jigs 4 are arranged as shown in Fig. 1 or 2 (
As shown in A), the surface 1a of the unsolidified extrusion molded product 1 is directly molded by rotating the shaft in the extrusion/conveyance direction of the extrusion molded product 1.
A large number of needle holes 1C were bored in the surface layer 1b of the extrusion molded product 1 in a grid pattern or staggered pattern by pressing or clamping with a pressure of 1 to 5 K(]/C1. At this time, the needle holes 1C were It is not a simple needle-shaped hole, but a hole with a substantially V-shaped cross section that is elongated in the direction of rotation of the axis of the drilling jig 4 as shown in the figure.Next, a pattern surface 5a consisting of an uneven geometric embossed pattern with a depth of 2 mm is formed. To create an embossed pattern that faces the surface of the molded product, move the jig 5 from 3 to 3 as shown in Figure 1 or Figure 2 (B).
When the surface of the extruded product 1 was pressed with a pressure of 15 K(]/cm', a sharp and deep shape matching the pattern plane was formed on the surface of the extruded product 1, as shown in Fig. 2 (C) and (D). 1
Transferred to a.

On the other hand, when using a similar extrusion molded product and immediately after extrusion molding, the same embossed pattern is formed on the surface of the product without performing the drilling process using the drilling jig 4 as described above.
When the embossed pattern was pressed with a pressure of 5 to 20 KMcf, the geometrically defective straight line part of the pattern surface 5a of the jig 5 could not form a sharp corner according to the jig shape, resulting in an indistinct roundness. Only an embossed pattern could be formed.

Therefore, when creating the embossed pattern, we changed the jig to a stucco-like or woodgrain-like jig, and immediately after extrusion molding, we tried pressing the same jig, but only a vague embossed pattern could be formed.

The above is an example in which a hole-drilling jig in which needle-like protrusions 3 are provided on the outer circumferential surface 2a of the drum-shaped base 2 is used. As shown, a hole-drilling jig 8 having similar needle-like protrusions 3 provided on the surface 6a of the flat substrate 6 is used to press or press the hole-drilling jig 8 onto the surface of the extruded product. It goes without saying that similar needle holes may be made.

<Effects of the Invention> According to the manufacturing method of the present invention configured as described above,
In order to create an embossed pattern on the surface of an extruded product, the surface layer of the molded product is given plasticity suitable for pressure forming of the embossed pattern in the pre-pressing process using a jig, so it is possible to always create the desired uneven pattern on the surface of the extruded product. It can be easily formed into a clear and sharp shape, and has the effect of improving the quality of molded products.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the process of an embodiment of this invention, and FIG. 2 (A
) to (D) are explanatory diagrams showing the respective states of the extrusion molded product in each step, and FIGS. It is. 1... Extrusion molded product, 2... Drum-shaped substrate, 3...
Needle-shaped projection, 4... Hole-drilling jig, 5... Jig with embossed pattern, 6... Flat base, 1a... Surface, 1
b...surface layer part, 1C...needle hole.

Claims (1)

[Claims] 1. A large number of needle holes are formed in the surface layer of an extruded product obtained by extruding a kneaded material for extrusion molding using an extrusion molding machine using a hole punching jig in which a large number of needle-like protrusions are formed. A method for applying an emboss pattern to an extrusion molded product, which comprises applying pressure to the surface of the extrusion molded product using an emboss design jig after forming the product. 2. Claim 1, characterized in that a drilling jig is used in which a large number of needle-like protrusions are formed on the surface of a flat substrate.
The method described in section. 3. The method according to claim 1, characterized in that a drilling jig having a large number of needle-like protrusions formed on the outer peripheral surface of the roll-shaped substrate is used.