JPH04176604A - Manufacture of tightly connecting type toilet bowl by pressure casting - Google Patents

Abstract

PURPOSE:To prevent non-conforming article from being produced by a method wherein non-water absorbing projection is provided at the projecting part for forming a falling water recess in a pressure mold. CONSTITUTION:A pressure mold consists of an upper splitable mold 20 and a lower splitable mold 25. When the upper mold 20 and the lower mold 25 are aligned with each other, a casting space S, which corresponds to the toilet bowl form for shaping a toilet bown, is produced. On the under surface of the upper mold 20, a first projecting part 21 and a second projecting part 22 are protrusively formed downwards. In addition, on the first projecting part 21, a projection 24 is hangingly formed so as to integrally form a vent hole 10 at cast molding. The projection 24 can be made out of non-water absorbable resin or metal rod. Through the vent hole 10, air circulates satisfactorily from a low tank seating part 5 side into the cavity in a connecting part 7 so as to satisfactoriy dry the interior of the connecting part 7 without developing the difference between drying speeds of the connecting part and of the remaining parts at drying, resulting in preventing the 'breaking' and the like at the position P from developing.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of manufacturing a closed toilet bowl by pressure casting.

(Prior art and its problems) Conventionally, for example, a closed toilet bowl as shown in the side view in Fig. 2 and in the plan view in Fig. 3 was pressure cast into a pressure mold, and after molding, it was poured from inside the pressure mold. When taking the product out and drying it, there was a problem in that a cut or the like would occur at the joining site between the low tank mounting part 5 and the connecting part 7, indicated by P in FIG. 2, resulting in a large number of defective products.

(Means for Solving the Problems) The present invention has been devised in view of the above-mentioned conventional problems, and aims to provide a method for manufacturing a closed toilet bowl that does not cause "cuts" etc. during drying. The purpose and gist of the plan is to provide a low tank mounting part that forms a falling water recess with an open top surface and in which a low tank is placed in a tightly packed manner, and a hollow-shaped tank that is formed at the bottom of the low tank mounting part with a wall in between. In the manufacturing method of a toilet bowl, the toilet bowl having a connecting portion is manufactured by pressure casting in a pressure mold, followed by drying and firing, wherein the projection for forming the water falling recess in the pressure mold is provided with a non-water-absorbing projection. A hole is formed through the wall between the low tank mounting portion and the connecting portion using the protrusion during casting, and the hole is filled after drying and before firing.

(Function) When manufacturing a strap-on toilet in a pressure mold, a non-water-absorbing protrusion is provided in the pressure mold, so this protrusion connects with the low tank mounting part of the toilet formed inside. A through-hole is formed in the wall between the parts, and during the process of taking out the molded product from the pressure mold and drying it, air passes through the formed hole to the connecting part side, improving air circulation. In particular, the cavity inside the connecting part is dried well, and the difference in shrinkage during drying between the low tank mounting part and the connecting part prevents the occurrence of "cuts" etc. Since the drying condition is uniform, it is possible to obtain a dried product without defects such as "cuts", and even when it is subsequently fired to produce a product, a good toilet bowl without "cuts" etc. can be obtained.

(Example) Embodiments of the present invention will be described below based on the drawings.

First, in the side view of FIG. 2 and the plan view of FIG. 3, the strap-on type toilet to be modeled will be explained. A concave bowl part 2 is formed inside the body part 1 of the strap-on type toilet. A rim part 3 is integrally provided with the main body part 1 above the pot part 2, and a leg part 4 is formed integrally with the lower part of the main body part 1. Further, a low tank mounting portion 5 is integrally formed on the rear side of the rim portion 3, and this low tank mounting portion 5
A low tank (not shown) can be placed on top in a water-like manner. At the bottom of this low tank mounting part 5, there is a connecting part 7 which is integrally formed with a hollow inside across a wall.
A lower portion of the connecting portion 7 is integrally connected to a drain pipe portion 6 formed integrally with the rear portion of the leg portion 4.

The inside of the low tank mounting part 5 is a concave-shaped water falling recess 8 whose upper surface is open, and two washing water holes 9, 9 are formed on the front side of this water falling recess 8. When washing water from a low tank (not shown) falls into the water falling recess 8, the washing water flows into the rim part 3 through the washing water hole 9, and the bowl part 2 can be washed with the washing water. It has become.

In this example, a hole 10 is formed vertically penetrating the wall between the low tank mounting portion 5 and the connecting portion 7. Conventionally, this hole 10 does not exist, so the low tank mounting portion 5 and There is no air circulation between the connecting parts 7, and drying is particularly slow in the hollow part inside the connecting parts 7. Therefore, due to shrinkage during drying, the P between the connecting parts 7 and the low tank mounting part 5 is The defective product may have been caused by a cut or the like in the part, because this vent hole 10 allows air to circulate well from the low tank mounting part 5 side into the cavity in the connecting part 7, so that the connecting part is not damaged during drying. 7 is well dried, there is no difference in drying speed, and therefore the structure is such that it is possible to prevent the occurrence of "cuts" etc. at the location P. This hole 10 is formed at the same time as casting in a pressure mold.

That is, when the schematic structure of the pressure mold is shown in FIG. 1, the pressure mold is composed of a separable upper mold 20 and a lower mold 25.
0 and the lower mold 25, a casting space S corresponding to the shape of the toilet bowl for molding the toilet bowl is formed therein.To explain the upper mold 20 in detail, the upper mold 20 A first protrusion 21 and a second protrusion 22 are formed in a downwardly protruding manner on the lower surface of the holder, and the first protrusion 21 is for forming the water fall recess 8 of the low tank mounting part 5. Also, the second protrusion 22 is for forming the pot part 2 of the main body part 1.

Furthermore, a protrusion 24 is formed in the first protrusion 21 in a hanging shape, and this protrusion 24 allows the extraction hole 1 to be formed during casting.
0 or is formed integrally.

The protrusion 24 can be formed into a rod shape using a non-water-absorbing resin or metal.

The upper mold 20 is a resin mold made of resin, and is provided with a pipe 23.23 or embedded in the lower surface of the pipe 23. It is capable of performing intraocular pressure or intraocular pressure.

That is, when pouring slurry into the casting space S, the slurry is poured into the casting space S from below through the lower die 25 under pressure, and at this time, the slurry is poured into the casting space S through the pipe 23 by a vacuum device, etc. When the suction is performed, the moisture in the slurry cast in the casting space S is sucked toward the vibrator 23 side, and is deposited on the inner wall surface of the first protrusion 21, second protrusion 22, etc. of the upper die 20. The slurry becomes thick and a toilet bowl having a shape as shown in FIGS. 2 and 3 is successfully formed in the casting space S.

Furthermore, when demolding, air is blown out and pressurized through the vibrator 23, so that the moisture that has soaked into the inner surface of the upper mold 20 flows out to the surface side, and this moisture forms a water film on the inner wall surface. , the product molded in the casting space S can be demolded satisfactorily. In this case, either a considerable amount of water will fall downward from the upper mold 20, or the falling water droplets should be properly discharged through the drain hole 10 into the connecting part 7 and out from the drain pipe part 6. This prevents water from accumulating in the water falling recess 8. In addition, the blown air can also escape through the vent holes 10, and troubles caused by water droplets and air can be avoided by the vent holes 10.

When the molded product is taken out from the casting space S and dried, the air circulation is improved by the vent hole 10 as described above, so the cavity in the connecting part 7 in particular is in a good dry state, and the shrinkage is evened out. It is possible to eliminate the occurrence of defective products without causing cuts, etc. After drying is completed, fill the hole 10 with clay or the like to fill the hole 10,
After that, it is fired in a firing pot to obtain a good product.

The present invention was devised in view of the above-mentioned conventional problems, and since the protrusion 24 for forming the punching hole 10 is formed of a non-water-absorbing material, the punching hole 10 is well formed during demolding. This makes demolding easier.

In this example, the pressure mold is explained as a resin mold, but a plaster mold is similarly provided with protrusions 24 to remove holes 10 during casting.
can be formed.

(Effects of the Invention) The present invention provides a low tank mounting part that forms a falling water recess with an open upper surface and in which a low tank is placed in a tightly packed manner, and a cavity that is formed at the bottom of the low tank mounting part with a wall in between. In the manufacturing method of a toilet bowl, the toilet bowl having a connecting part of the shape is pressure cast molded in a pressure mold, and then dried and fired. A protrusion was provided, and the protrusion was used to form a hole that penetrated the wall between the low tank mounting part and the connecting part during casting, and the hole was filled after drying and before firing. It is possible to form a hole well through the hole and improve demolding by punching the hole, and when drying the modeled area that has been taken out, air circulation is improved through the hole and shrinkage during drying is uniform. This eliminates the occurrence of defective products without causing "cuts" as in the conventional case.

Moreover, after drying, by filling the holes and firing, it is possible to successfully manufacture a band-type toilet bowl.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and FIG. 1 is a schematic configuration diagram of a pressure mold, and FIG. 2 is a side configuration diagram of a toilet bowl formed by a pressure mold.
FIG. 3 is a plan view of FIG. 2. 1... Main body part 5... Low tank mounting part 7... Connection part 8... Falling water concave part 10...
- Extraction hole 20... Upper die 21... First protrusion 22... Second protrusion 23... Vibrator
24...Protrusion 25...Lower mold S...
Casting space patent applicant Inax Co., Ltd. Agent Patent attorney Yoshihisa Shimizu Main body 5 Low tank i! Placement part 7... Connecting part 8... Falling water recess 10... Extraction hole
20・Upper mold 21...1st protrusion IllI22...2nd
Protrusion 23...Vibe 24...Protrusion 25...
Lower mold S...casting space') Fig. 1

Claims (1)

[Claims] Pressure is applied to the toilet bowl, which has a low tank mounting part that forms a falling water recess with an open top surface and a low tank is placed in a tightly packed manner, and a hollow connecting part that is formed at the bottom of the low tank mounting part with a wall in between. In the manufacturing method of a toilet bowl, which is manufactured by pressure casting in a mold, followed by drying and firing, a non-water-absorbing protrusion is provided on the protrusion for forming the water falling recess in the pressure mold, and the protrusion allows the casting to be carried out by the protrusion. A method for manufacturing a closed-type toilet bowl by pressure casting, characterized in that a hole is formed through the wall between the low tank mounting part and the connecting part during molding, and the hole is filled after drying and before firing.