JP2001170917A - Molding die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save on a manufacturing cost and make it easy to remove a molding material from a plurality of minute air holes formed in a template, even when the air holes are clogged with the molding material and further, enable a sharply patterned design to be stably formed. SOLUTION: A reinforcing frame 11 is fixed to at least the back peripheral edge part of a thin wall template 10 which has a pattern-molding face 1 formed on the surface and also a plurality of minute air holes 2 opened from the surface to the back. In addition, a back plate 5 in which a plurality of air holes 4 are opened from the surface to the back, is arranged, in a freely attachable/ detachable manner, opposite to the thin wall template 10, on the reinforcing frame 11. Further venting passages 14 which make each of the air holes 2 communicate with each of the air holes 4, are provided between the thin wall template 10 and the back plate 5 and a venting support member 15 for supporting the thin wall template 10 from the back is installed upright.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die. More specifically, the invention of this application makes the manufacturing cost low, makes it easy to remove even if the molding material is clogged in a large number of minute air holes formed in the template, is excellent in maintenance, and has a sharp pattern on the surface of the green sheet. The present invention relates to a molding die capable of stably forming a pattern.

[0002]

2. Description of the Related Art Conventionally, cement-based inorganic plates have been widely used as exterior materials used for exterior walls and roofs of houses and the like. When the cement-based inorganic plate is manufactured by forming a cement kneaded product into a sheet-like green sheet and producing a plate-like green sheet, a molding die is pressed on the surface of the green sheet by a molding press, and a predetermined irregularity is formed. A pattern is formed to impart designability. This patterning is generally performed as follows.

That is, as shown in FIG. 3A, after a plate-like green sheet (31) is supplied immediately below a molding die (32) provided in a molding press, a slide ram descends. The green sheet (31) is placed in the outer frame (33).

Next, as shown in FIG. 3B, the slide ram further descends, and the molding die (32) presses the surface of the green sheet (31), whereby the concavo-convex pattern is pressure-formed. At this time, the green sheet (31) and the molding die (3
The air between 2) is sucked and extracted through a large number of air holes formed in the molding die (32) through the front and back surfaces.

Thereafter, as shown in FIG. 3C, the molding die (32) is kept as it is, while the slide ram is raised, and only the outer frame (33) is moved to the green sheet (31). Release from mold.

Finally, as shown in FIG. 3 <d>, the mold (32) is released while supplying air blow through the air holes of the mold (32). Several molding dies (32) used for such patterning have been proposed so far, and a representative one is illustrated in FIG.

The molding die (32) shown in FIG. 4 has a pattern molding surface (1) on the surface, and a mold plate (3) in which a number of minute air holes (2) penetrating the front and back are formed. And a back plate (5) in which a plurality of ventilation holes (4) penetrating the front and back are formed.
It has. The back plate (5) is overlapped and fixed on the back surface of the template (3), and its ventilation hole (4) communicates with the ventilation hole (2). And a molding die (32)
Is fixed to a slide ram (7) of a molding press via a molding die mounting base (6). Ventilation passages (8) and (9) are formed in the molding die mounting base (6) and the slide ram (7).
It communicates with the ventilation hole (2) and the ventilation hole (4) of 2).

A molding die (32) shown in FIG. 5 has also been proposed. Mold (32) shown in FIG.
Here, a thin-walled template (10) is adopted, and a reinforcing frame (11) is fixed to the peripheral edge of the back surface. The back plate (5) is disposed so as to face the thin template (10), and a large number of granular members (12) made of glass beads or a gas-permeable resin are provided between the back plate (5) and the thin template (10). Is filled.

[0009]

However, several problems are pointed out in the molding die (32) shown in FIGS. 4 and 5.

With respect to the molding die (32) shown in FIG. 4, since the thickness of the mold plate (3) is generally 20 to 40 mm and is thick, it takes a lot of processing time to form the ventilation hole (2). And it was reflected in the production cost. Also, a molding die (32)
Is pressed against the surface of the green sheet (31) as shown in FIG. 3, and the air between the green sheet (31) and the green sheet (31) is sucked through the air hole (2) during pressure molding. In (2), clogging of the molding material tends to occur. In the molding die (32) shown in FIG. 4, since the mold plate (3) is thick as described above, it is difficult to remove the clogging of the molding material generated in the ventilation holes (2).

On the other hand, the molding die (32) shown in FIG. 5 employs a thin mold plate (10), which facilitates the formation of the ventilation hole (2) and reduces the production cost. However, the presence of the granular member (12) hinders the removal of the clogging of the molding material generated in the ventilation hole (2). The back plate (5) is detachable from the thin mold plate (10),
Even if the disassembly and cleaning can be performed, handling of the granular member (12) becomes a problem. Further, in the molding die (32) shown in FIG. 5, since the molding material entering the inside from the ventilation hole (2) gradually accumulates, the air permeability of the molding die (32) decreases. As a result, the pattern formed on the surface of the green sheet (31) loses sharpness, and in the worst case, the molding material adheres to the pattern forming surface (1) of the thin mold plate (10), resulting in poor mold release. And so on. Further, in the molding die (32) shown in FIG. 5, the granular member (12) filled between the thin mold plate (10) and the back plate (5) is easy to move, and the thin mold plate is formed during the pressure molding. Since the (10) cannot be sufficiently supported, the thin mold plate (10) bends, and there is also a problem that sufficient planar accuracy cannot be maintained. This leads to a decrease in the planar accuracy of the pattern formed on the surface of the green sheet (31).

The invention of this application has been made in view of the circumstances described above, and solves the above-mentioned problems of a molding die, reduces the manufacturing cost, and reduces the number of minute It is an object of the present invention to provide a molding die which can be easily removed even when a molding material is clogged in a ventilation hole, is excellent in maintainability, and can form a sharp pattern on a green sheet surface stably.

[0013]

Means for Solving the Problems According to the invention of this application, as a means for solving the above-mentioned problems, a pattern forming surface is provided on the surface,
A reinforcing frame is fixed to at least the peripheral edge of the back surface of the thin mold plate in which a large number of minute ventilation holes penetrating the front and back are formed. It is disposed detachably facing the plate, and has a ventilation path between these thin mold plates and the back plate that communicates the ventilation holes formed in each, so that the thin mold plates can be supported from the back surface A molding die (Claim 1) is provided, wherein the ventilation support member is set upright.

In the invention of this application, a first fastener is fixed at a predetermined position on the back surface of the thin mold plate, and a hollow spacer is interposed between the first fastener and the back plate to form a second fastener. The tool penetrates the back plate, is fastened to the first fastener through the hollow portion of the spacer, and the back plate is fixed to the thin template, and the thin template that the ventilation support member contacts is provided. A flat portion is provided on the back surface, and the ventilation support member is in surface contact with the rear surface of the thin mold plate in this flat portion (Claim 3).
A pipe having a vent hole on a side surface, and a plurality of pipes are provided between the thin mold plate and the back plate.
Are provided as preferred embodiments.

Hereinafter, the molding die of the present invention will be described in more detail with reference to the drawings.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of an essential part showing an embodiment of a molding die according to the present invention. For example, as shown in FIG. 1, a molding die (3
In (2), a thin mold plate (1) having a pattern forming surface (1) on the surface and a large number of minute air holes (2) penetrating the front and back sides is formed.
A back plate (5) in which a plurality of ventilation holes (4) penetrating through the front and back are formed in the reinforcing frame (11) is fixed to at least a peripheral portion of the back surface of the back plate (0). Opposite to (10), it is detachably provided by a fastener (13) such as a bolt.

Further, the molding die (32) of the invention of the present application
In this example, the thin mold plate (10) and the back plate (5) are provided with an air passage (14) for communicating the vent hole (2) and the vent hole (4) formed in each of the thin mold plate (10) and the back plate (5). A ventilation support member (15) that can support 10) from the back surface is provided upright.

As described above, the molding die (32) of the invention of this application employs the thin mold plate (10) similarly to the molding die (32) shown in FIG. The processing time required for forming the pores (2) is reduced, and the manufacturing cost is reduced. The thickness of the thin template (10) is generally 5
It can be about 10 mm. The production method is not particularly limited. For example, the ventilation holes (2) are processed in a nickel electroformed product, or the pattern pattern is machined and the ventilation holes (2) are processed on a thin metal plate surface by an NC engraving machine. Or machining the vent hole (2) in a thin-walled precision cast product. Such a thin mold plate (10) is reinforced by a reinforcing frame (11) fixed to the peripheral edge of the back surface, and has increased rigidity. The reinforcing frame (11) can be provided not only at the peripheral portion of the rear surface but also at an arbitrary portion of the rear surface in consideration of the rigidity of the thin mold plate (10). The air holes (2) have a diameter of, for example, 10 to 500 μm and an interval of about 5 mm. Also, as shown in FIG. 1, the vent hole (2) is spread in a trumpet shape toward the back surface of the thin mold plate (10) in order to ensure sufficient air permeability and to minimize the suction of the molding material. be able to.

The molding die (32) of the invention of the present application
In this case, the ventilation support member (15) as described above is erected between the thin mold plate (10) and the back plate (5), so that the molding material generated in the ventilation hole (2) can be easily clogged. Can be removed. Specifically, when the molding material is clogged in the ventilation hole (2) of the thin mold plate (10) by the pressure molding, the pattern forming surface (1) of the thin mold plate (10) is formed.
By blowing air or cleaning water onto the air holes and simultaneously performing suction through the air passages (14) of the air flow supporting member (15), clogging of the molding material generated in the air holes (2) can be easily removed. If the clogging of the molding material cannot be removed by such an operation, the fixing of the back plate (5) is released, the molding die (32) is disassembled, and the thin mold plate (10) is removed from both sides. Washing can be performed directly using washing water. The ventilation support member (15) is much easier to handle than the granular member (12) shown in FIG. 5, and the mold (32) is easily disassembled and cleaned. Also,
For example, as shown in FIG. 2, by fixing the ventilation support member (15) to the back plate (5), the ventilation support member (1) is fixed.
The handling of 5) is further facilitated, and the disassembling and cleaning of the molding die (32) is further facilitated.

As described above, the molding die (32) of the present invention is excellent in maintenance. In addition, as described above, the clogging of the molding material generated in the ventilation hole (2) of the thin mold plate (10) is easily removed, so that the molding material does not enter the inside of the molding die (32). Therefore, the air permeability of the molding die (32) is kept good, and a sharp pattern is stably formed on the surface of the green sheet (31). The molding material does not adhere to the pattern molding surface (1) of the thin mold plate (10), and the mold release does not occur. Foreign matter adhering to the pattern forming surface (1) at the time of mold release is easily removed by air blowing blown out from the air holes (2).

Further, the molding die (3
In 2), the ventilation support member (15) is provided with a thin template (10).
Can be supported from the back, so the thin template (10)
Means not only the reinforcing frame (11) but also the ventilation support member (15)
Also reinforced, the rigidity is further increased. Therefore, even if the back plate (5) is simply fixed to the reinforcing frame (11), the rigidity of the thin mold plate (10) is improved, and the bending that is likely to occur in the thin mold plate (10) at the time of pressure molding is suppressed. Thereby, the planar accuracy of the thin mold plate (10) is improved, and the planar accuracy of the pattern formed on the surface of the green sheet (31) is also improved. As described above, the ventilation support member (15) is advantageously fixed to the back plate (5) from the viewpoint of disassembly and cleaning.
As shown in FIG. 2, a flat portion (16) is provided on the back surface of the thin mold plate (10) in contact with the ventilation support member (15). It is also advantageous to make surface contact with the back side of the plate (10). This is because the standing state of the ventilation support member (15) is stabilized by the surface contact. Thereby, the ventilation hole (2) and the ventilation path (14) communicate with each other securely, and the molding die (3) is formed.
The air permeability of 2) is sufficiently ensured. In addition, thin template (1
0) can be held at a predetermined distance from the back plate (5), and the plane accuracy of the thin mold plate (10) can be further enhanced. Such a flat part (16)
Can be easily formed by cutting out the thin mold plate (10) in the thickness direction as shown in FIG.
Care must be taken that the strength of the thin mold plate (10) does not decrease due to the decrease in thickness.

In order to further improve the planar accuracy of the thin template (10), the back plate (5) may be replaced with the thin template (1).
It is effective to fix directly to 0). The fixing of the back plate (5) can be specifically performed as follows.

That is, for example, as shown in FIG.
A first fastener (17) such as a nut is fixed to a predetermined position on the back surface of the thin template (10), and the first fastener (17) is fixed.
The hollow spacer (1
8) and a second fastener (19) such as a bolt,
Penetrate the back plate (5) and place the spacer (18)
To the first fastener (17) through the hollow part (20). By interposing a spacer (18),
The bending of the thin-walled template (10) which may occur with the fastening of the first fastener (17) and the second fastener (19) is prevented, and the thin-walled template (10) and the back plate (5) are prevented. Can be accurately secured. The thin mold plate (10) is also supported from the back surface by the spacer (18), and the rigidity is further increased.

When the first fastener (17) such as a nut is fixed to the back surface of the thin mold plate (10), as shown in FIG. It is preferable to provide a flat portion (16) on the back surface of the thin mold plate (10). This is for the same reason as for the ventilation support member (15).

For example, in the molding die (32) of the invention of the present application exemplified above, the ventilation support member (15) is further provided.
May be formed by a plurality of pipes (21). In this case, a ventilation hole (22) is formed in the side surface of the pipe (21), and the ventilation path (14) is provided not only in the length direction of the pipe (21) but also between the plurality of pipes (21). Be formed and ensure sufficient ventilation. The diameter, thickness, and number of pipes (21) can be appropriately set according to molding pressure and the like. As an example, pipe diameter 60m
m, wall thickness 5 mm, and pipe interval 100 mm. The pipe (21) can be made of, for example, metal. By fixing such a pipe (21) to the back plate (5) by welding or bonding, special molding,
The ventilation support member (15) can be easily formed without requiring processing or the like.

As a matter of course, a member other than the pipe (21) can be applied to the ventilation support member (15). For example, an integral member formed in a lattice shape can be used. The invention of this application is not limited by the above embodiments. The shape and thickness of the thin template, the position of the reinforcing frame,
It goes without saying that various aspects are possible for details such as the configuration and structure of the ventilation support member and the back plate.

[0027]

As described in detail above, according to the invention of this application, the manufacturing cost of a molding die can be reduced. Further, even if a large number of minute air holes formed in the template are clogged with the molding material, the molding material can be easily removed, and the maintainability is improved. Further, a sharp pattern can be stably formed on the surface of the green sheet.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of a molding die of the present invention.

FIG. 2 is an exploded cross-sectional view of a main part showing one embodiment of a molding die of the present invention.

FIGS. 3A, 3B, 3C, and 3D are main-portion cross-sectional views schematically illustrating a green sheet patterning process using a molding die. FIGS.

FIG. 4 is a sectional view of a main part showing a molding die before the invention of this application.

FIG. 5 is a sectional view of a main part showing a molding die before the invention of this application.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pattern molding surface 2 Vent hole 3 Mold plate 4 Vent hole 5 Back plate 6 Molding mold mounting base 7 Slide ram 8, 9 Vent path 10 Thin mold plate 11 Reinforcement frame 12 Granular member 13 Fastener 14 Vent path 15 Vent support member DESCRIPTION OF SYMBOLS 16 Flat part 17 1st fastener 18 Spacer 19 2nd fastener 20 Hollow part 21 Pipe 22 Vent hole 31 Green sheet 32 Molding die 33 Outer frame

Claims (4)

[Claims] 1. A reinforcing frame is fixed to at least a peripheral portion of a back side of a thin mold plate having a pattern forming surface on a front surface and having a large number of fine ventilation holes penetrating the front and back sides. A back plate having a plurality of ventilation holes formed therein is detachably disposed facing the thin-walled template, and communicates the ventilation holes and the ventilation holes formed respectively between the thin-walled template and the back plate. A molding die having an air passage, and an upright supporting member for supporting a thin mold plate from a back surface. 2. A first fastener is fixed at a predetermined position on the back of the thin mold plate, a hollow spacer is interposed between the first fastener and the back plate, and the second fastener is connected to the back plate. 2. The molding die according to claim 1, wherein the back plate is fixed to the thin mold plate by penetrating the first fastener through the hollow portion of the spacer. 3. The molding die according to claim 1, wherein a flat portion is provided on the back surface of the thin mold plate in contact with the ventilation support member, and the ventilation support member is in surface contact with the back surface of the thin mold plate in the flat portion. . 4. The molding die according to claim 1, wherein the ventilation supporting member is a pipe having a ventilation hole on a side surface, and a plurality of the ventilation supporting members are erected between the thin mold plate and the back plate.