JPH0516110A - Molding device for hydraulic inorganic molded form - Google Patents

Abstract

PURPOSE:To surely prevent a drain hole formed in a mold from being clogged by one part of cement particles which is sucked from the molding material and dehydrated. CONSTITUTION:A cover 15 with many dehydrating holes formed thereto is provided along the mold face of a bottom force 71. Thereafter the molding material is supplied into a cavity formed by the bottom force 71 and a top force 5 by interposing an extensible filter medium 9. This molding material is sucked and dehydrated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding device for a hydraulic inorganic molded product.

[0002]

2. Description of the Related Art Generally, a molding material containing a hydraulic inorganic substance which hardens by a hydration reaction, such as cement, gypsum, and calcium silicate, contains water in the hydraulic inorganic substance, and if necessary, glass as a fiber reinforcing material. Inorganic fibers such as fibers, organic fibers such as animal and vegetable fibers, synthetic fibers, and sand and gravel as aggregates are contained.

A molding apparatus 1 as shown in FIGS. 3 and 4 is used for molding a molded product using such a molding material. The molding apparatus 1 includes a molding die 2, a supply device 3 that supplies the molding material to the molding die 2, and a dehydrator 4 that dewaters the molding material supplied to the molding die 2.

The molding die 2 comprises an upper die 5 and a number of drainage holes 6
Lower die 7 having a diameter of 1.5 mm and a pitch of 15 mm
When the upper die 5 and the lower die 7 are clamped, a cavity adapted to the shape of the shaped object is formed. Then, the upper mold 5 is formed with a supply hole 8 communicating with a molding material supply device 3 described later, while the lower mold 7 is provided with
The expanded filter material 9 formed of the expandable material is fixed in a slightly stretched state, and when the molding material is supplied to the cavity, the expanded filter material 9 may expand along the mold surface of the lower mold 7. It is possible.

The supply device 3 is provided on the hose 11 and a hose 11 for connecting the storage tank 10 for the molding material, which is installed apart from the mold 2, the storage tank 10 and the supply hole 8 described above. By driving the injection pump 12, the molding material of the storage tank 10 can be sucked and the molding material can be pressed into the cavity through the supply hole 8.

Further, the dehydrator 4 comprises a suction box 13 fixed to the lower part of the lower mold 7 and a pipe 14 provided with a drain pump (not shown). By driving the drain pump, the lower mold 7 and the suction box The space formed by 13 and 13 can be decompressed. As a result, the moisture of the molding material press-fitted into the cavity is squeezed out and collected in the suction box 13 through the extension filter material 9 and the water drain hole 6 formed in the lower mold 7, and then drained to the outside through the pipe 14, Can be dehydrated.

In order to mold a molded product by the molding apparatus 1 as described above, the hydraulic inorganic molding material is fixed to the cavity formed by the upper mold 5 and the lower mold 7 by the injection pump 12 with the stretched filter medium 9 interposed. The molding material is dehydrated by press-fitting with a pressure and sucking the space formed by the lower mold 7 and the suction box 13 with a drainage pump in a state where the extension filter material 9 is along the mold surface of the lower mold 7. After shaping, it is cured by curing (see Japanese Patent Publication No. 61-51521).

[0008]

However, when the molding material is sucked and dewatered through the stretching filter material, the stretching filter material passes a part of the cement particles in addition to the water contained in the molding material, resulting in a certain number of times. When the molding operation is performed, there is a problem that the cement particles are clogged and clogged in the water drain holes formed in the lower mold. Therefore, when the water drain holes are closed, it is necessary to interrupt the molding work and open the drain holes one by one with a drill.

The present invention has been made in view of the above problems, and provides a molding apparatus for a hydraulic inorganic molded article capable of reliably preventing clogging of drain holes formed in a mold. Is.

[0010]

DISCLOSURE OF THE INVENTION The present invention comprises a molding die comprising an upper die and a lower die having a large number of drainage holes, a feeding device for feeding a molding material to a cavity formed in the molding die, and a molding die. A dehydrator was used to dehydrate the molding material supplied to the mold, and a cover having a large number of dehydration holes formed along the mold surface of the lower mold was arranged, and an extension filter material was arranged on the cover. It is characterized by that.

[0011]

[Function] A cover having a large number of dehydration holes formed along the mold surface of the lower mold is mounted, and the mold is clamped in a state in which the expanded filter material is located on the cover, and the lower mold and the upper mold are formed. After supplying the molding material to the cavity, the molding material is sucked and dehydrated.

As a result, some of the cement particles are sucked from the molding material together with water, but the cement particles are trapped by the dehydration holes of the cover, so that the drain holes of the lower mold are clogged. Is reliably prevented.

If the dehydration hole of the cover is clogged after the molding operation is performed a set number of times, the cover may be removed from the lower mold and a new cover may be attached to the lower mold.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

For the sake of convenience of explanation, the same members as those of the conventional example shown in FIGS. 3 and 4 are designated by the same reference numerals, and detailed description thereof will be omitted to avoid duplication.

In the molding apparatus 1A in this embodiment,
The mold surface of the lower mold ₇₁ constituting the mold 2 _1, cover 15 is molded in the same shape as the lower mold _71, such as by vacuum forming is detachably attached. This cover 15 is ABS
About 1 in thickness made of resin or polyethylene
A large number of dehydration holes 16 having a diameter of 1.5 mm and a pitch of 15 mm are formed.

[0017] Incidentally, the water drainage holes are formed in the lower mold 7 ₁ 6
_In consideration of the frequency and easiness of cleaning, it is preferable that 1 has a diameter of about 5 to 30 mm, but it does not necessarily have to be large.

Therefore, in order to mold the molded product, the cover 15 is attached to the lower mold 7 ₁ and the expansion filter material 9 is fixed, and the hydraulic inorganic molding is performed in the cavity formed by the upper mold 5 and the lower mold 7 _1. material under pressure with the infusion pump 12, the space formed by the lower mold ₇₁ in a state in which along the stretch filtering material 9 in the cover 15 mounted on the mold surface of the lower mold 7 ₁ and the suction box 13 with the drainage pump The molding material may be dehydrated and shaped by suction, and then cured and cured.

In this case, the expansion filter material 9 allows the water contained in the molding material and a part of the cement particles to pass therethrough, but the part of the cement particles is removed from the dehydration hole 1 of the cover 15.
6 supplemented by results, it is reliably prevented from water drainage hole ₆₁ of the lower mold ₇₁ by cement particles I can coupled with the drainage hole ₆₁ of the lower mold ₇₁ is enlarged to clogging. Then, by performing the set number of times the molding operation, after the spin-drying hole 16 has left the cover 15 which clogged the lower mold _71, a new cover 15
The mold may be mounted on the mold surface of the lower mold 7 _{1 and} the molding operation may be performed again. On the other hand, the cover 15 in which the dehydration holes 16 are clogged can be reused because the clogging can be easily eliminated by washing with high pressure water.

In this embodiment, the lower mold 7 ₁ is provided with the water draining hole 6 ₁ and the molded product is molded by suction dehydration from the outside of the lower mold 7 _1. It is also possible to form water drainage holes, and also to suck and dehydrate from the upper mold 5 side by interposing an extension filter material. At that time, if necessary, a cover may be attached along the mold surface of the upper mold 5.

On the other hand, it is also possible to form an uneven pattern for decoration on the surface of the cover 15. By forming a decorative concavo-convex pattern on the surface of the cover 15, the surface of the molded product is decorated with the concavo-convex pattern. That is, when the conventional molded product is decorated, the mold surface of the lower mold 7 has to be shaved to form a concave-convex pattern, which requires a lot of man-hours and cost and does not replace the lower mold 7. As long as a single decoration is obtained as far as possible, when the cover 15 is used, a molded product with different decoration can be easily manufactured only by preparing a cover 15 having a different uneven pattern and exchanging it appropriately. be able to.

[0022]

As described above, according to the present invention, since the cover having a large number of dehydration holes formed along the mold surface of the lower mold is detachably arranged, the drainage hole of the lower mold is formed. Can be reliably prevented from being clogged, and even if the dehydration hole of the cover is clogged, the molding operation can be restarted simply by replacing the cover with a new cover. In this case, the cover in which the dehydration holes are clogged can be reused by washing.

Further, by forming a decorative concavo-convex pattern on the surface of the cover and preparing a cover having a different concavo-convex pattern, a molded product with different decoration can be easily molded without replacing the lower mold. There is an advantage that can be.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing the overall configuration of a molding apparatus of the present invention.

FIG. 2 is an enlarged view of a portion X in FIG.

FIG. 3 is a schematic cross-sectional view showing the overall configuration of a conventional molding device.

FIG. 4 is an enlarged view of a portion Y in FIG.

[Explanation of symbols]

1A Molding device 2 ₁ Mold 3 Supply device 4 Dewatering device 5 Upper mold 6 ₁ Drain hole 7 ₁ Lower mold 9 Extension filter material 15 Cover 16 Dewatering hole

Claims (2)

[Claims] 1. A molding die comprising an upper mold and a lower mold having a large number of drainage holes, a supply device for supplying a molding material to a cavity formed in the molding die, and a molding material supplied to the molding die. A hydraulic inorganic material characterized by comprising a dehydrating device for dehydrating, arranging a cover having a large number of dehydrating holes along the mold surface of the lower mold, and further disposing an extension filter material on the cover. Molding equipment for moldings. 2. The apparatus for molding a hydraulic inorganic molded article according to claim 1, wherein an uneven pattern for decoration is formed on the surface of the cover.