JP3629528B2 - Press forming method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The invention of this application relates to a press molding method and an apparatus therefor. More specifically, the invention of this application has been improved with regard to press molding of fluid materials such as cement-based materials, which can perform molding such as patterning with good product accuracy and excellent productivity. The present invention relates to a new method and an apparatus therefor, and further to a method for producing a cement molded product by this method.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known a method of manufacturing a cement-based product having a joint or pattern on the surface thereof by press molding as a building roofing material, an outer wall material, or an accessory. In this press molding, a fluid material such as a cement-based material having fluidity, that is, a kneaded material, or a plate-like body cut into a predetermined shape, is press-pressed. Molding is performed.
[0003]
For example, FIGS. 3 and 4 schematically illustrate the method and apparatus of such a press molding method. Lower mold base (1), upper mold (2) that can be raised and lowered by a press, and can be lowered and compressed, and lift cylinder (3) can be raised and lowered, and can be pressed against lower mold base (1) In the press molding apparatus provided with the mold frame (4), first, as shown in FIG. 3, the fluid material (5) is placed on the lower mold base (1), and the mold is moved by the lifting cylinder (3). The frame (4) is lowered and pressed against the lower mold base (1).
[0004]
Next, in a state where the periphery of the fluid material (5) is surrounded by the mold (4), the upper die (2) is lowered and press-pressed against the fluid material (5) to form joints and patterns. A press-formed product of a predetermined shape is manufactured.
In such press molding of the flowable material (5), the flowable material (5) flows out unless the flow is stopped. Therefore, the lower mold of the metal mold such as iron as the mold (4) By pressing the base (1), the fluid material (5) is prevented from flowing out of the mold (4) during pressurization.
[0005]
[Problems to be solved by the invention]
However, in the conventional method and apparatus as described above, although the flow of the fluid material (5) can be prevented for the time being, as shown in FIG. 4, the upper mold (2) and the mold (4) In reality, it is difficult to completely prevent the flowable material (5) from flowing out from the gap (A) between the mold (4) and the gap (B) between the mold (4) and the lower mold base (1). there were.
[0006]
In order to eliminate this outflow, the contact accuracy between the upper mold (2) and the mold (4) is increased so that the clearance is, for example, 0.05 mm or less, and the smoothness of the lower mold base (1) is increased, In order to ensure such clearance accuracy, a large formwork (4), for example, having a width of about 1 to 1.5 m and a length of about 3 m is required. Since the processing conditions are extremely strict, productivity is greatly restricted in terms of work and cost.
[0007]
The outflow of the flowable material (5) is difficult because it is difficult for the product after press molding to have a shape of a predetermined size, and it is difficult to improve productivity in the above-described points. There was a strong demand for deterrence measures.
Therefore, the invention of this application eliminates the problems of the conventional press molding method and apparatus as described above, and enables to ensure product accuracy and improve productivity. It is an object of the present invention to provide an improved new press molding method and an apparatus therefor.
[0008]
[Means for Solving the Problems]
In order to solve the problems as described above, the invention of this application is as follows. First, in a press molding method in which a fluid material is surrounded by a mold and pressed by an upper mold on a lower mold base. The elastic body provided on the frame is pressed against the lower mold base to be elastically deformed, and the elastic body is subjected to pressure molding with the upper mold in a state where the elastically deformed elastic body is in contact with the upper mold side and the surface of the lower mold base. A press forming method is provided.
[0009]
The second aspect of the invention of this application is the press molding method according to the second aspect, wherein the elastic body is a rubber or resin having surface slipperiness and is integrated with the metal mold. 3 also provides a press molding method in which the rubber having surface lubricity is silicon rubber having a hardness of 30 degrees or less.
Fourthly, the invention of this application is a press forming apparatus for a fluid material, and includes a mold frame together with a lower mold base and an upper mold, and the mold frame is elastic to abut against the lower mold base. When the fluid material is surrounded by the mold and pressure-molded by the upper mold on the lower mold base, the elastic body provided on the mold contacts the lower mold base. Press forming apparatus, wherein the elastic body is pressed and elastically deformed, and the elastically deformed elastic body is in contact with the surfaces of the upper mold side and the lower mold base. A rubber or resin having surface lubricity, which is a press molding apparatus disposed and integrated in a metal mold. Sixth, a rubber having surface lubricity has a hardness of 30 degrees or less. A press molding apparatus is provided.
[0010]
Furthermore, the invention of this application is seventhly a method for producing a cement-based product by the method of any one of the first to third inventions, wherein a fluid cement-based material is patterned and press-molded. A method for producing a cement-based product is provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The invention of this application has the features as described above, and the embodiments will be described in detail below as examples with reference to the drawings.
[0012]
【Example】
FIG. 1 illustrates the method and apparatus of the present invention. For example, in the apparatus for press molding illustrated in FIG. 1, a lower mold base (1), a removable upper mold (2) that can be raised and lowered by a pressing machine and can be lowered and compressed, and a raising and lowering cylinder. A mold (4) that can be raised and lowered by (3) and that can be pressed against the lower mold base (1) is provided. In this apparatus, the mold (4) includes a metal mold (41) and an elastic body (42) arranged and integrated with the metal mold (41). The elastic body (42) is a lower mold base (1). It is arrange | positioned in the downward position so that it may be pressed by. The elastic body (42) can be elastically deformed by this pressing, for example, as shown in FIG.
[0013]
In the press molding method of the present invention using such a press device, first, as illustrated in FIG. 2, a fluid material (5) such as cementite material is placed on the lower mold base (1), and an elevating cylinder ( The mold (4) is lowered by 3) to bring the elastic body (42) into contact with the lower mold base (1).
Next, in a state where the periphery of the fluid material (5) is surrounded by the mold (4), the elastic body (42) is pressed against the lower mold base (1) to be elastically deformed, and the upper mold (2) is lowered. As shown in FIG. 1, the elastic body (42) that is elastically deformed is in contact with the side (2A) of the upper mold (2) and the surface (1B) of the lower mold base (1). According to 2), the flowable material (5) is pressure-molded with a predetermined pressure.
[0014]
Since the elastic body (42) is brought into close contact with the upper mold side (2A) and the lower mold base surface (1B) by elastic deformation, the side (2A) of the upper mold (2) and the metal mold (41) Even if there is a gap between them, there is no concern that the flowable material (5) will flow out as in the prior art, and the flowability will be outside the mold (4) on the surface (1B) of the lower mold base (1). The material (5) does not flow out.
[0015]
The elastic body (42) that has an excellent effect for preventing the flowable material (5) from flowing out is composed of rubber or resin, or a composite material of these with metal, ceramics, or the like, having sealing properties and elastic deformation. can do. A rubber hardness of 30 degrees or less is appropriate from the standpoint of performance that it can be elastically deformed and bend easily. From the point that the upper die (2) descends and comes into contact with the elastic body (42), the one having the smallest sliding resistance associated with this contact and the one that the fluid material (5) is difficult to adhere to. Is appropriate. That is, those having surface lubricity are preferably used.
[0016]
In consideration of the various aspects described above, it is considered that silicon rubber, particularly silicon rubber having a rubber hardness of 30 degrees or less, is one of suitable materials for the elastic body (42).
The elastic body (42) such as silicon rubber may be disposed and integrated with the metal mold (41) by baking, or the elastic body (42) is tightly integrated with the protruding portion or groove of the metal mold (41). It may be arranged and arranged. The means may be arbitrary.
[0017]
1 and 2, the elastic body (42) is provided as a single unit in the metal mold (41), but a plurality of elastic bodies (42) may be arranged and integrated in the metal mold (41). Needless to say.
The press molding method and the apparatus therefor having the characteristics as described above are extremely useful for manufacturing a roof material, an outer wall material, an accessory, and the like from a cement-based material. Joints and patterning can be prevented from flowing out of the mold (4) of the material to the outside with good product accuracy and excellent productivity.
[0018]
Actually, the hardened material made of cement mortar in the form of a plate is used as the flowable material (5), and silicon rubber having a rubber hardness of 27 degrees is used for the elastic body (42), and this is applied to the iron metal mold (41). When surface patterning was performed by an apparatus equipped with a mold (4) integrated with baking, no outflow of mortar as a fluid material (5) was observed, and this outflow was completely caused by elastically deformed silicon rubber. It was confirmed that it was prevented. Moreover, adhesion of mortar to silicon rubber was not recognized.
[0019]
Although not shown in the figure, the press molding apparatus shown in FIGS. 1 and 2 is configured by a spring integrated with the press machine instead of the cylinder (3). ) May be pressed against the lower mold base (1), or the lower mold base (1) itself may constitute a mold having a predetermined shape.
[0020]
The upper mold (2) may have a vent hole, a blow-out air hole for demolding, a release oil supply hole, and the like, and the lower mold base (1) also has a dewatering hole, etc. It may be.
For the fluid material (5), various materials such as cement-based materials, other inorganic materials, or semi-cured resins are considered.
[0021]
【The invention's effect】
As explained in detail above, the invention of this application ensures that the flowable material does not flow out of the mold, ensures product accuracy, and there is no restriction on productivity improvement due to processing and cost increase to prevent this outflow. It is possible to press form a fluid material.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view of a press molding apparatus illustrating the configuration of a method and apparatus according to the present invention.
2 is a schematic cross-sectional view of the apparatus of FIG. 1 showing a state before pressurization.
FIG. 3 is a schematic sectional view of a conventional apparatus.
4 is a schematic sectional view similar to FIG.
[Explanation of symbols]
1 Lower mold base 2 Upper mold 3 Cylinder 4 Form 5 Flowable material 1B Lower mold base surface 2A Upper mold side A, B Gap

Claims (7)

In a press molding method in which a fluid material is surrounded by a mold and pressed by an upper mold on a lower mold base, the elastic body provided on the mold is pressed against the lower mold base to be elastically deformed and elastically deformed. A press molding method characterized by pressure molding with an upper mold in a state where an elastic body is in contact with a surface of an upper mold side and a lower mold base. 2. The press molding method according to claim 1, wherein the elastic body is a rubber or resin having surface slipperiness and is integrated and disposed in a metal mold. 3. The press molding method according to claim 2, wherein the rubber having surface lubricity is silicon rubber having a hardness of 30 degrees or less. This is a fluid material press-molding device, which is provided with a mold frame together with a lower mold base and an upper mold. The mold frame is provided with an elastic body that comes into contact with the lower mold base. When pressure molding is performed by the upper mold on the lower mold base surrounded by the frame, the elastic body provided on the mold frame is pressed against the lower mold base to be elastically deformed and elastically deformed. A press molding apparatus, wherein the body is in contact with the upper mold side and the surface of the lower mold base. The press molding apparatus according to claim 4, wherein the elastic body is a rubber or a resin having surface slipperiness, and is disposed and integrated in a metal mold. 6. The press molding apparatus according to claim 5, wherein the rubber having surface lubricity is silicon rubber having a hardness of 30 degrees or less. A method for manufacturing a cement-based product according to any one of claims 1 to 3, wherein the fluid-based cement-based material is patterned and press-molded.

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