JP2000141333A - Molding equipment for hydraulic inorganic molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transfer a hydraulic inorganic molding which is molded by suckingly dehydrating the excess moisture of a hydraulic inorganic molding material through a bottom mold and, at the same time, to which a pressing operation with a top mold is performed for molding, from the bottom mold to a catch mold without the development of deformation, cracking and sink in the body after the removal of the top mold. SOLUTION: The longitudinal crosssectional surface of the sucking device 40 of an unloading device 4 is nearly similar in a shape to that of the molding surface 20 of a top mold. The dimensions of the device 4 in its width direction and its direction of the thickness are made larger than those of the top mold by 0.1-0.33%. As a result, when a molded body left on a bottom mold is unloaded with an unloading device, the deformation of the molded body is checked, resulting in allowing to stably manufacture a dense and good quality molded body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an apparatus for forming a hydraulic inorganic molded article.

[0002]

2. Description of the Related Art As shown in FIGS. 2 and 3, a hydraulic inorganic cured product used as a building material or the like is molded by a molding apparatus 100 as a hydraulic inorganic molded product (hereinafter, referred to simply as a "formed product").
It is manufactured by transferring w to a receiving mold 33 after molding w and curing and curing on the receiving mold 33.

That is, as shown in FIGS. 2 and 3A, a molding apparatus 100 includes an upper mold 12, a lower mold 13, and a take-out device 14, and forms a molded body w as follows. At the same time, the compact w is transferred to the receiving die 16. First, as shown in FIG.
The upper mold 1 is inserted into the mold cavity formed by closing the upper mold 12 and the lower mold 13.
2. A hydraulic inorganic molding material (hereinafter, simply referred to as “molding material”) 50 is injected from a material supply port 120 provided in the mold 2, and excess moisture contained in the molding material 50 injected into the mold cavity is removed. , Drain hole 13 provided in the mold surface of lower mold 13
The molded body w is molded by suction dehydration from 1.

[0004] Next, as shown in FIG.
After the removal, the suction surface 14a of the take-out device 14 having the suction surface 14a formed at the same dimensional ratio as the mold surface of the upper die 12 on the surface 12a where the upper die 12 is in close contact with the molding w.
Is applied, and the molded body w is vacuum-sucked to the suction surface 14b by suction from the small holes 14b. Then, the molded body w taken out of the lower mold 13 while being vacuum-sucked on the suction surface 14a of the take-out device 14 is transferred to the receiving mold 1 as shown in FIG.
6 (see Japanese Utility Model Laid-Open No. 5-7478).
9 publication).

However, in the conventional molding apparatus 100, when molding the molded body w, only the suction dehydration is performed through the drain hole 131 provided in the lower mold 13, and the molding material 5 in the mold cavity is formed.
0 does not press itself, so that the resulting molded body w
However, there is a problem that the denseness is lacking, and the finally obtained hydraulically inorganic cured product is weak in strength.

The inventor of the present invention has proposed that the lower die and the take-out device have the same structure as the molding device 100, but that the upper die surface has an airtight elasticity in which the periphery is hermetically sealed. A forming apparatus having a configuration covered with a sheet has been proposed earlier. The above molding apparatus is configured such that, when molding a molded body, the molding material in the mold cavity is suction-dehydrated from a drain hole provided in the lower mold, and the elastic sheet and the upper mold which cover the mold surface of the upper mold are formed. A pressurized medium such as water or air is press-fitted between the mold surface and the elastic sheet to swell in the direction of the lower mold surface to apply pressure to the molding material in the mold cavity, thereby forming the molding. It is designed to make the body more compact.

[0007]

However, in the above-mentioned molding apparatus, the surface of the molded body to be molded is in close contact with the mold surface of the upper mold by an amount corresponding to the expansion of the elastic sheet provided on the upper mold. But,
It is compressed in the lower mold side of the upper mold surface, that is, in the width direction and the thickness direction side in the longitudinal cross section of the molded article to be molded. Therefore, if a molded body is taken out from the lower mold using a take-out device whose suction surface has the same dimensional ratio as the mold surface of the upper mold, a gap is formed between the suction surface and the molded body, and the suction In such a case, the molded body may be deformed, cracked, or dented.

Accordingly, the present invention has been made in view of the above-mentioned circumstances, and has been developed in order to reduce the density of a hydraulic inorganic molded product and to obtain a hydraulic inorganic cured product having excellent strength. The excess water of the molding material is suctioned and dehydrated with the lower mold, and the hydraulic inorganic molded body formed by performing the operation of applying pressure with the upper mold is deformed, cracked, or dent after removing the upper mold. An object of the present invention is to provide a molding apparatus for a hydraulic inorganic molded article having a take-out device that can be transferred from the lower mold to the receiving mold without causing the molding.

[0009]

Means for Solving the Problems To achieve the above object, a molding apparatus for a hydraulic inorganic molded article according to the present invention comprises:
A mold formed by closing a lower mold in which a large number of drain holes are formed along the mold surface and an upper mold in which the mold surface is covered with an air-tight elastic sheet whose peripheral edge is hermetically sealed. The hydraulic inorganic molding material is press-fitted into the cavity, and the excess water in the hydraulic inorganic molding material is suction-dehydrated from a drain hole formed in the lower mold surface to form a desired shape, and By pressing a pressurized medium between the elastic sheet and the mold surface of the upper mold, the elastic sheet expands to the lower mold side, and the hydraulic inorganic molding material is compressed through the elastic sheet to form a hydraulic inorganic molding. After molding, the upper mold is removed, and the hydraulic inorganic molded body remaining on the lower mold is taken out while being vacuum-sucked on the suction surface of the take-out device. The longitudinal cross section of the suction surface of the device is The cross section in the longitudinal direction of the mold surface, and has a substantially similar shape, the dimensions in the width direction and the thickness direction of the cross section in the longitudinal direction of the suction surface, compared with the transverse cross section in the longitudinal direction of the mold surface, Each is formed to be larger by 0.1% to 0.33%.

In the above structure, the width and the thickness of the cross section in the longitudinal direction of the suction surface are 0.1% to 0.3% respectively in comparison with the cross section in the longitudinal direction of the upper mold surface.
Beyond the range of 3% larger, the adsorption surface becomes
The hydraulic inorganic molded article does not match the hydraulic inorganic molded article to be molded, and when the hydraulic inorganic molded article is taken out, the hydraulic inorganic molded article may be deformed or cracks or dents may occur.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a molding apparatus for a hydraulic inorganic molded article according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing one embodiment of a molding apparatus for a hydraulic inorganic molded article according to the present invention (hereinafter, simply referred to as “molding apparatus”).

As shown in FIG. 1, the molding apparatus 1 includes an upper die 2, a lower die 3, and a take-out device 4. The upper die 2 includes an elastic sheet 21, a pressurized medium press-in hole 22, a material supply pipe 23, and a material supply port 24, and is freely movable in the vertical and horizontal directions.

The elastic sheet 21 is formed of a material having airtightness, covers the mold surface 20 of the upper mold 2, and ensures that the space between the peripheral portion 21a and the mold surface 20 is airtight. Sealed. The lower mold 3 has a water drain hole 31 on the mold surface 30. The take-out device 4 has a suction surface 40 on which a number of small holes 41 are provided. The small hole 41 is formed in the hollow portion 4 inside the take-out device 4.
It leads to 2. The cavity 42 is connected to a vacuum pump or a pressure pump via a switching valve, though not shown in the drawing via a pipe 43. In addition, the take-out device 4 is movable in the vertical and horizontal directions similarly to the upper mold 2, and the hydraulic inorganic molded body (hereinafter, referred to as “remaining”) on the lower mold 3.
Only referred to as "mold". ) The suction surface 40 can be applied to W.

FIG. 4 shows the suction surface 40 and the mold surface 20 of the upper mold 2.
FIG. 4 is a reference diagram for explaining the dimensions of FIG. Suction surface 40
Is such that the dimension in the width direction Y and the thickness direction Z in the transverse section in the longitudinal direction X shown in FIG. 4 is larger than the dimension in the width direction y and the thickness direction z in the transverse section in the longitudinal direction x of the mold surface 20 of the upper mold 2. hand,
Each is formed to be 0.1% to 0.33% larger. In the drawing, reference numeral 44 denotes a seal member.

Next, a molding W is molded from a hydraulic inorganic molding material (hereinafter, simply referred to as “molding material”) 5 by using the molding apparatus 1, and the molding W is taken out from the lower mold 3.
The state of the transfer will be described.

1) As shown in FIG. 1, the upper mold 2 and the lower mold 3
The molding material 5 is injected from a material supply port 24 provided in the upper mold 2 through a material supply pipe 23 into the mold cavity formed by closing the mold. 2) Next, the excess water contained in the molding material 5 filled in the mold cavity is drained into the drain hole 3 provided in the mold surface 30 of the lower mold 3.
1 and a pressurizing medium such as water or air is press-fitted from a pressurizing medium press-in hole 22 between the elastic sheet 21 and the mold surface 20 of the upper mold 2 to lower the elastic sheet 21 into a lower mold. 3
The pressure is applied to the molding material 5 by expanding the molding material 5 toward the mold surface 30 to form the molding W.

3) After the molded body W is molded, the upper mold 2 is removed, and the suction surface 40 of the take-out device 4 is replaced with the surface on which the upper mold 2 of the molded body W is in close contact (hereinafter referred to as the “molded body upper surface”). This applies to 20a. 4) While the suction surface 40 is in contact with the upper surface 20a of the molded body, the air in the cavity 42 is vacuum-depressurized by a vacuum pump through the pipe 43, and is suctioned from the small hole 41 to thereby move the molded body W to the suction surface. The removal device 4 is lifted and the molded body W is removed from the lower mold 3 while maintaining the vacuum suction state on the vacuum mold 40.

5) After that, the take-out device 4 is moved to the position of the receiving mold, and the molded body W is made to follow the receiving surface of the receiving mold. Then, the vacuum suction of the vacuum pump is stopped. By operating, pressurized air is sent into the cavity 42 through the pipe 43, and the inside of the cavity 42 is pressurized to send pressurized air from the small holes 41 to the molded body upper surface 20a side, and the molded body W The molded body W is forcibly released and the molded body W is transferred to the receiving mold.

As described above, in the molding apparatus 1, the dimension in the width direction X and the thickness direction Y of the longitudinal cross section of the suction surface 40 of the take-out device 4 is the same as that in the longitudinal direction of the mold surface 20 of the upper mold 2. Since the formed body W is formed to be 0.1% to 0.33% larger than the surface, the molded body W is compressed by expanding the elastic sheet 21 covering the mold surface 20 of the upper mold 2, Even if the upper surface 20a of the molded body is expanded, the suction surface 4
When adsorbed to zero, the distortion of the compact W is reduced. Therefore, when the molded body W is taken out from the lower mold 3, the molded body W does not break, and the molded body W does not crack or dent.

As the moving means of the upper mold 2 or the take-out device 4 in the molding apparatus 1, the same rail may be used, for example, such that they may be shared with each other, or independent moving means may be used. . Further, the present invention is not limited to the above embodiment. For example, the removal device 4 in the molding apparatus 1 forcibly releases the molded body W and transfers the molded body W to the receiving die, but the removal device naturally releases the molded body W from the mold. You may make it do. Further, a vibration unit or the like may be provided in the take-out device to assist in releasing the molded body W from the mold.

[0021]

Embodiments of the present invention will be described below in detail. (Example 1) As shown in FIG. 1, a length 800 mm formed of a rolled steel material for general structural use (SS41) and having a large number of drain holes 31 having a diameter of 3 mmφ formed at a 50 mm pitch in a mold surface 30.
× lower 420 mm × depth 210 mm 3 and 10 mm
The elastic sheet 21 made of natural rubber having a thickness of is provided along the mold surface 20. The dimension in the longitudinal direction X × the width direction Y × the thickness direction Z in FIG. 4 is 800 mm × 400 mm ×
The 200 mm upper mold 2 was closed.

Next, the mold having a diameter of 1
Through a material supply port 24 provided at the center of the upper mold 2 via a material supply pipe 23 having a diameter of 0 mm, a molding material 5 to be described later is filled at a pressure of 20 kg / cm ² and the lower mold 3 is filled. Excess water in the molding material 5 is suctioned and dehydrated at a pressure of −600 mmHg from the drain hole 31, and water as a pressurizing medium is injected through the pressurizing medium press-in hole 22 at an injection pressure of 30 kg / cm ^{2 to} form an upper mold. 2 between the mold surface 20 and the elastic sheet 21,
The molding material 5 in the mold cavity was compressed by the elastic sheet 21 to obtain a molding W.

Thereafter, as shown in FIG. 1, the upper mold 2 is removed from the molded body W, and the molded body W on the mold surface 30 of the lower mold 3 is removed.
The longitudinal cross section of the suction surface 40 is the mold surface 2 of the upper mold 2.
0 has a shape substantially similar to the cross section in the longitudinal direction, and the dimensions in the width direction and the thickness direction are each formed 0.33% larger, that is, in the longitudinal direction X in FIG.
The dimension in the width direction Y × thickness direction Z is 800 × 401.3.
It was taken out from the mold surface 30 of the lower mold 3 by a take-out device 4 having a suction surface 40 formed with dimensions of × 200.6 mm and having a large number of small holes 41 having a diameter of 2 mmφ formed at a pitch of 50 mm. This operation was repeated 2,000 times, and it was confirmed whether or not the formed body W had any abnormality.

[Blending of molding material 5] 100 parts by weight of ordinary Portland cement (manufactured by Ube Industries, Ltd.) 2.5 parts by weight of cellulosic fiber "Cellofiber" (manufactured by Hyogo Pulp & Paper Co., Ltd.) Fly ash (manufactured by Kanden Kako Co.) 25 parts by weight ・ Water 500 parts by weight

(Comparative Example 1) As in the embodiment, the upper mold 2 and
The molded body W is molded in the mold cavity formed by the closing with the lower mold 3, and thereafter, the outer diameter of the suction surface of the take-out device is the same as the dimension of the mold surface 20 of the upper mold 2, that is, the length in FIG. The dimension in direction X × width direction Y × thickness direction Z is 800 × 40
The operation of removing the compact W from the lower mold 3 was repeated 2,000 times using a removal device having the same configuration as that of the first embodiment except that the compact W was formed in a size of 0 × 200 mm. Was confirmed.

The results of Example 1 and Comparative Example 1 are as shown in Table 1 below.

[0027]

[Table 1]

From the results shown in Table 3, the molding apparatus of the present invention also shows that when the operation of removing the molded body W from the lower mold 3 is performed,
It can be seen that no deformation, dent, or cracks occur.
Therefore, according to the molding apparatus of the present invention, defective products do not occur when removing the molded body from the lower mold.

[0029]

As described above, according to the molding apparatus for a hydraulic inorganic molded article shown in the present invention, the width and thickness of the cross section in the longitudinal direction of the suction surface of the take-out apparatus are larger than those of the upper mold. Each of the moldings is formed to be 0.1% to 0.33% larger than the cross section in the longitudinal direction of the surface. To ensure a dense, high-quality molded product,
It can be taken out without causing deformation, dents, cracks, etc. That is, a high quality product can be stably manufactured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a take-out device and a lower mold in a hydraulic inorganic molded article according to the present invention.

FIG. 2 is a cross-sectional view of a conventionally used apparatus for molding a hydraulic inorganic molded article.

FIG. 3 is a cross-sectional view showing the operation of an apparatus for taking out a hydraulic inorganic molded article used in the molding apparatus shown in FIG.

FIG. 4 is a reference diagram for explaining dimensions of a suction surface of a take-out device and a mold surface of an upper mold.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Molding apparatus 2 Upper die 20 Mold surface 21 Elastic sheet 3 Lower die 31 Drainage hole 4 Extraction device 40 Adsorption surface 5 Hydraulic inorganic molding material W Hydraulic inorganic molded object X Longitudinal direction Y Width direction Z Thickness direction

Claims (1)

[Claims] 1. A lower mold having a large number of water drain holes formed along a mold surface and an upper mold having a mold surface covered with an airtight elastic sheet whose peripheral edge is hermetically sealed. The hydraulic inorganic molding material is press-fitted into the mold cavity thus formed, and the excess water in the hydraulic inorganic molding material is sucked and dewatered from a water drain hole formed in the lower mold surface into a desired shape. Along with shaping, the pressurized medium is pressed between the elastic sheet and the mold surface of the upper mold to swell the elastic sheet to the lower mold side, and compress the hydraulic inorganic molding material through the elastic sheet. After molding the hydraulic inorganic molded body, the upper mold is removed, and the hydraulic inorganic molded body remaining on the lower mold is removed while being vacuum-sucked on the suction surface of the take-out device. In the device, a lateral side of a suction surface of the take-out device in a longitudinal direction. The surface is substantially similar in shape to the longitudinal cross section of the upper mold surface, and the width and thickness dimensions of the longitudinal cross section of the suction surface are in the longitudinal direction of the mold surface. 0.1% to 0.
An apparatus for forming a hydraulic inorganic molded article, which is formed to be 33% larger.