JPH08267423A - Drying device of gypsum mold - Google Patents

Abstract

PURPOSE: To enable a gypsum mold to be dried in a significantly shortened time and improve molding efficiency by a hose with the rear end connected to a hot air duct and the front end inserted into a space between the gypsum molds on a molding table, and an air heating device which supplies a hot air to a hot air duct. CONSTITUTION: A hot air is blown from an air heater 42 through a duct 34 and a hose 40, into a space between gypsum molds 14 and thus the gypsum mold 14 is dried. A part of the hot air leaks out through a clearance in a curtain, but most of the hot air is circulated to the air heater from the duct 46. Thus the gypsum mold 14 is dried by the hot air. If the gypsum mold 14 is dried by the hot air, time required for the curing of a mold wall can be shortened as the temperature of the gypsum mold 14 increases. when parting the mold, the curtain 36 is wound up using a winder 36W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for drying gypsum molds for slurry casting of ceramics.

[0002]

2. Description of the Related Art A sludge pouring device for injecting sludge into a plaster mold and injecting the inner surface of a plaster mold molding space to mold ceramics has been widely used as a molding device for toilet bowls, washbasins and the like. (For example, Japanese Patent Publication No. 6-67567).

The gypsum mold for casting the slurry is divided into several molds such as an upper mold, a lower mold, and a horizontal mold. By combining the molds, a gypsum mold having a molding space inside is constructed. It

FIGS. 4 and 5 show a conventional example of a slurry pouring device for mass-producing Western-style toilets.
A large number of carriages 12 are installed on the rails 11, and a plaster mold 14 is placed on the upper side thereof. Gypsum mold 14 is lower mold 1
6, the left and right horizontal dies 18, 20 and the upper die 22 are provided, and the lower die 16 is fitted to the horizontal dies 18, 20 from the lower side.
Is configured to cover the upper end surfaces of the horizontal molds 18, 20.

The gypsum mold 14 is installed on a support plate 24, and the support plate 24 is placed on the carriage 12. Reference numeral 26 denotes wheels of the carriage 12.

As shown in FIG. 4, a large number of plaster molds 14 are arranged side by side, and a hydraulic cylinder (not shown) arranged on the left end side of FIG. 4 faces the end member 30 on the right side of FIG. Then, the horizontal molds 18 and 20 are watertightly adhered to each other. The upper mold 14 is clamped to the horizontal molds 18 and 20 by a chuck device such as an air chuck.

After the mating surfaces of the molds 16, 18, 20, 22 are watertightly matched in this manner, the slurry is injected into the plaster mold 14.

There is a gap 28 between the plaster molds 14, 14.

[0009] A predetermined time (eg 60
After 120 minutes), the excess slurry is discharged (mud).
Next, air is press-fitted into the plaster mold 14 to accelerate the inking.
Then, after leaving for a required time, the mold is removed and the molded product is taken out.

When the molding cycle of such mold assembling → slurry injection → exhaust mud → air pressure → demolding is repeated a plurality of times, water is accumulated in the gypsum mold, so the gypsum mold is dried. After the drying is complete, the gypsum mold is again used for multiple molding cycles.

Conventionally, in order to perform this drying, air is applied to the gypsum mold with a fan or the like.

[0012]

In the drying with the fan, the time required for the gypsum mold to be sufficiently dried is about 10 to 14 hours, which is extremely long, and the molding efficiency is low.

It is an object of the present invention to provide a gypsum-type drying device which can dry in a short time.

[0014]

According to a first aspect of the present invention, there is provided a gypsum mold drying apparatus having a warm air duct installed along a molding table on which a plurality of gypsum molds are placed, and a rear end of the hot air duct. Connected,
It is provided with a hose whose tip is inserted between gypsum molds on a molding table, and an air heating device for supplying warm air to the warm air duct.

A gypsum-type drying device according to a second aspect is the first aspect.
In the above, an enclosure surrounding the molding table and the gypsum mold on it is formed, and the air heating device supplies that the air inside the enclosure is sucked and heated.

[0016]

According to the gypsum mold drying apparatus of the present invention, the gypsum mold can be dried with warm air in a short time. In addition, the temperature of the gypsum mold is raised by the warm air.

According to the gypsum mold drying device of the second aspect, the air blown to the gypsum mold can be recirculated, and the thermal efficiency is improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front sectional view (cross-sectional view taken along the line II of FIG. 2) of a gypsum-type drying device according to the embodiment, and FIG. 2 is a sectional view taken along the line II-II of FIG. 3 is a plan view of the apparatus of the embodiment.

A top plate 32 is arranged above the molding table 10, and a duct 34 is arranged on the top plate 32. A curtain winder 36W is arranged on the peripheral edge of the top plate 32, and the curtain 36 is hung vertically.

On the lower surface of the duct 34, the same number of nozzles 38 as those of the gypsum mold 14 are projected. The upper end of the hose 40 is connected to the nozzle 38, and the lower end is inserted into the gap 28 between the plaster molds 14.

Hot air is introduced into the duct 34 from the air heater 42. A duct 46 that connects the intake port 44 of the top plate 32 and the air heater 40 is provided. The duct 46 is provided with a fan 48 for blowing air.

Other symbols in FIGS. 1 and 2 indicate the same parts as in FIGS.

In the gypsum-type dryer having the above-described structure, the hot air of about 50 ° C. from the air heater 42 is blown into the space between the gypsum-type molds 14 through the duct 34 and the hose 40 so that the gypsum-type mold 14 is removed. dry. Some of this warm air flows out through the gap of the curtain 36, but most of the warm air is circulated from the duct 46 to the air heater 42.

In this way, the gypsum mold 14 can be dried in a short time with warm air. As a result of various experiments, in the conventional example, 12
According to the example of the present invention, it was possible to carry out the drying with Hr at about 5 Hr.

Further, when the gypsum mold 14 is dried with warm air in this manner, the temperature of the gypsum mold 14 also rises, so that the time required for inking is shortened. For example, it takes about 60 minutes to inject meat, which conventionally took about 90 minutes.

When the mold is removed, the winder 36
Since the curtain 36 can be rolled up by W, the curtain 36 does not interfere with the demolding work.

In the above embodiment, the plaster mold for molding a Western style toilet is dried, but the device of the present invention can be applied to dry the plaster mold for molding various ceramics such as a washbasin.

[0028]

As described above, according to the drying apparatus of the present invention, the drying time of the gypsum mold can be greatly shortened and the molding efficiency can be remarkably improved. Also, by heating the gypsum mold,
The inking time is also shortened, which also improves the molding efficiency.

In the drying device according to the second aspect, the hot air is circulated, and the thermal efficiency is good.

[Brief description of drawings]

FIG. 1 is a front sectional view of a gypsum-type drying device according to an embodiment.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a plan view of an example device.

FIG. 4 is a front view showing a conventional example.

5 is a sectional view taken along line VV of FIG.

[Explanation of symbols]

 10 Molding Table 14 Gypsum Model 28 Gap 34,46 Duct 38 Nozzle 40 Hose 42 Air Heater 48 Fan

Claims (2)

[Claims] 1. A warm air duct installed along a molding table on which a plurality of gypsum molds are placed, a rear end of which is connected to the warm air duct, and a front end of the gypsum mold on the molding table. A gypsum-type drying device comprising an inserted hose and an air heating device for supplying warm air to the warm air duct. 2. The enclosure according to claim 1, wherein an enclosure surrounding the molding table and the gypsum mold thereon is formed, and the air heating device sucks and heats the air inside the enclosure. Gypsum-type drying device for supplying.