JPH05285918A - Slip cast-molding method of molded object having opening - Google Patents

Abstract

PURPOSE:To improve molding work efficiency and production efficiency to a large extent by inserting a soft material in the through-hole provided to the place where the soft material is attached of a mold and forming a large diameter hole part to the through-hole on the outer surface side of the mold to provide the flange part fitted in the large diameter hole part to the soft material. CONSTITUTION:A through-hole 12 becomes a large diameter hole part 12A on the side of the outer surface 11a of a mold 11 and the flange part 13A fitted in the large diameter hole part 12A is provided to a soft material 13. The soft material 13 is stably and strongly fixed to the mold 11 by tightly fitting the flange part 13A of the soft material 13 in the large diameter hole part 12A. By this constitution, when deposited matter 20 is demolded from the mold 11 and the soft material 13 is pulled out of the deposited matter 20, the detachment of the soft material 13 is certainly prevented. When the soft material 13 is replaced, it can be easily detached.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge casting method for forming a molded article with an opening, and more particularly, to a molded article having an opening such as a low tank of a flush toilet or a lid of a low tank, which can be easily and easily formed by the sludge casting method. The present invention relates to an efficient manufacturing method.

[0002]

2. Description of the Related Art Sludge (powdered granules for molding in the form of mud) is poured into a molding space formed in a mold composed of an upper mold, a lower mold, etc. A liquid casting method in which the liquid component (for example, water) is infiltrated into the molding die, and the remaining powdered and kneaded clay is inlaid on the inner surface of the molding die, and then the molding die is separated and the ingot is taken out. Is widely used today as a method for manufacturing various sanitary ware and the like.

Conventionally, when a molded product having an opening such as a low tank of a flush toilet or a lid of a low tank is manufactured by this sludge casting molding method, for example, a molding space between an upper mold and a lower mold. Slurry is supplied to the ingot to allow it to incinerate, and this inoculated object is released from the mold, and then a molded body without openings is first molded,
There is a method in which an opening is formed by manually cutting out the opening forming portion of the molded body by a worker.

In the above-mentioned conventional method, complicated opening cutting work is required after sludge casting, which requires a lot of man-hours and low manufacturing efficiency. There is a risk of cracks and chips in the molded product during the cutting operation, resulting in poor product yield. Since it is manually performed by the worker, the opening position may be displaced from the predetermined position, and it is difficult to form the opening with high accuracy. Requires skilled workers. There were drawbacks such as.

As a method for solving the above-mentioned conventional problems and for easily and efficiently producing a molded article having an opening by a slurry casting method, the present applicant has previously described FIGS. 6 and 7. As shown in FIG.
In the figure, the soft material 4 is attached to the opening formation planned portion of the upper mold 1), and the soft material 4 is brought into close contact with the other molding die or the soft material (lower mold 2 in FIG. 6) attached to the other molding die. After that, a patent application was filed for a slurry casting molding method of a molded body with an opening for supplying the slurry 3 (Japanese Patent Application No. 1-178622; hereinafter referred to as "prior application").

According to the method of this prior application, since the soft material 4 attached to the opening forming planned portion of the molding die causes the molding space of the portion other than the soft material 4 to be inlaid, A molded body having an opening formed in a portion is molded.

The soft material 4 is expanded in diameter by its elasticity when it is brought into close contact with the other molding die or soft material, and is reduced in its original state by releasing the close contact force. For this reason, as shown in FIG. 7 (b), by inking in the expanded state and then returning to the original state, a gap 6 is formed between the inlaid object 5 and the soft material 4. , Fig. 7 (c)
As shown in (3), the meat material 5 and the soft material 4 can be easily separated.

By the way, as one of the sludge casting methods, the sludge is supplied into a molding die, and after the meat is inoculated to some extent, the remaining sludge is discharged, and then the sludge is kept in this state to form the water content of the inoculum. A sludge casting method is also widely used in which the inlaid material is released from the forming die after being transferred to the die. Even when forming a molded body with an opening by this sludge casting method, a soft material such as silicon may be attached to the molding die.

[0009]

According to the method of the above-mentioned prior application, the opening can be easily formed at the time of molding, but since the fixing strength of the soft material to the molding die is not sufficient, the demolding is performed. There is a drawback that the soft material can be easily removed at times.

The above-mentioned drawbacks can be solved by adhering the soft material to the molding die with an adhesive, but in this case, there is a drawback that it is not easy to replace or collect the soft material.

The present invention solves the above-mentioned problems of the prior art, and in a sludge casting molding method of a molding with an opening in which a soft material is attached to a portion of a molding die where an opening is to be formed, the molding is performed without using an adhesive, It is an object of the present invention to provide a method for increasing the fixing strength between a soft material and a molding die, and preventing the soft material from coming off during demolding.

[0012]

According to the method of the present invention, sludge is supplied to a molding space to adhere a meat product to a molding space surface of a liquid absorbing mold, and then the meat product is released from the mold. A method for molding a molded article with an opening by a slurry casting molding method, comprising attaching a non-water-absorbing soft material to a portion of the molding space of the molding die where the opening is to be formed, This is a forming method of a molded product with an opening, in which an opening is formed by removing the material from the inlaid material.

According to a first aspect of the present invention, there is provided a method for molding a molded product with an opening according to the above method, wherein the molding die is provided with a through hole at a position where the soft material is attached, and the soft material is inserted into the through hole. It is characterized in that the through hole has a large-diameter hole portion on the outer surface side of the molding die, and the soft material is provided with a flange portion fitted into the large-diameter hole portion.

According to a second aspect of the present invention, there is provided a molding method for sludge molding of an opening according to the first aspect of the present invention, wherein in one of the molding dies, a posture for pressing the soft material covered by the flange portion and a separation from the flange portion are provided. It is characterized in that a rotatable soft material stopper is provided so as to be able to assume the above posture.

According to a third aspect of the present invention, in the method, the molding die is provided with a through hole at a position where the soft material is attached, and the soft material is inserted into the through hole. A groove is provided around the inner peripheral surface in the middle of the hole axis direction, and the soft material is provided with a protrusion fitted into the groove.

According to a fourth aspect of the present invention, in the method, the molding die is provided with a through hole at a position where the soft material is attached, and the soft material is inserted into the through hole. Is characterized in that a flange portion is provided so as to cover an edge portion of the through hole on the outer surface side of the molding die, and the flange portion is attached to the one molding die with a screw.

[0017]

In the method of the first aspect, the soft material is stably and firmly fixed to the molding die by fitting the large diameter hole portion of the through hole and the flange portion of the soft material.

According to the second aspect of the present invention, the soft material is securely fixed to the mold by being pressed by the soft material stopper provided on the mold and covering the flange portion of the soft material.
When removing the soft material, the soft material stopper may be rotated to separate from the flange portion of the soft material.

In the method of the third aspect, the soft material is stably and firmly fixed to the molding die by fitting the groove formed around the inner peripheral surface of the through hole and the projection of the soft material.

In the method according to the fourth aspect, the flange portion of the soft material is attached to the molding die with a screw, so that the soft material is stably and firmly fixed to the molding die.

[0021]

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

Each of FIGS. 1 to 5 is an enlarged cross-sectional view in the vicinity of the soft material mounting portion showing one method of carrying out the slurry casting molding method of the molded body with openings of the present invention.

The method of the present invention is basically the same as the method of the prior application, in which a non-water-absorbing soft material is attached to the opening forming portion of the molding space surface of the liquid absorbing mold, and this molding is performed. After the sludge is supplied to the space to attach the inoculum to the surface of the forming space of the forming die, the soft material is removed from the incineration product when the inhalation product is released to obtain a formed body. This is a method of forming an opening and molding a molded article with an opening.

As shown in FIGS. 1 to 5, a through hole 12 is provided in a portion of the molding die 11 to which the soft materials 13, 14, 15, 16 are to be attached.
Insert 16.

In the method of claim 1, as shown in FIG. 1, the through hole 12 has a large diameter hole portion 12A on the outer surface 11a side of the molding die 11, and the soft material 13 has the large diameter hole portion 12A. Part 1
A flange portion 13A fitted to 2A is provided. In the present embodiment, by tightly fitting the large-diameter hole portion 12A and the flange portion 13A of the soft material 13, when the meat product 20 is released from the molding die 11, the meat product 20 is softened. When the material 13 is pulled out, the soft material is surely prevented from falling off.

In this case, the shapes of the flange portion of the soft material and the large-diameter hole portion of the through hole are not particularly limited, and as shown in FIG. 2, the soft material 14 is provided with a reverse taper-shaped flange portion 14A and molded. The large diameter hole portion 12B of the through hole 12 of the mold 11 may also have an inverse tapered shape. In this case, the soft material is more reliably prevented from falling off.

In the method of the second aspect, as shown in FIG. 3, the soft material stopper 17 is provided on the outer surface side of the molding die 11. This soft material stopper 17 is, for example, the stopper body 1
7A and a screw 17 for rotatably fixing the same to the molding die 11
The stopper body 17A is configured to have a soft material holding posture in which the stopper body 17A covers the flange portion 13A of the soft material 13 to prevent the soft material 13 from falling off. When removing the soft material 13, the stopper body 17A may be rotated to separate it from the flange portion 13A of the soft material 13. In this case, since the soft material is fixed by the soft material stopper 17, the shape of the flange portion is the outer surface 1 of the molding die 11.
It is also possible to use a taper shape in which the diameter increases toward the 1a side.

According to the method of claim 3, as shown in FIG. 4, a groove 12C is provided around the inner peripheral surface of the through hole 12 of the molding die 11 in the middle of the through hole 12 in the axial direction of the hole, and the groove is formed in the soft material 15. 12C is provided with a protrusion 15A that fits into the groove 12C and the protrusion 15A.
By fitting with, the soft material 15 is fixed to the molding die 11 to prevent the soft material 15 from falling off.

In the method of claim 4, as shown in FIG. 5, the outer surface 1 of the molding die 11 of the through hole 12 is formed in the soft material 16.
A flange portion 16A covering the edge portion on the 1a side is provided, and the flange portion 16A is fixed to the molding die 11 with a screw 18 to prevent the soft material 16 from falling off. By loosening the screw 18, the soft material 16 can be easily removed. In this case, the flange portion 16A does not necessarily have to be made of a soft material, only the cylindrical portion 16B is made of a soft material, and the flange portion 16A is made of another material, and both are integrated. Is also good.

The method shown in FIGS. 1 to 5 is one embodiment of the present invention, and the present invention is not limited to the illustrated method.

In any of the methods, when the soft material is worn or broken, it can be replaced very easily, and the mounting condition of the soft material is extremely strong and stable. The falling of the material is surely prevented.

The soft material is not particularly limited as long as it has appropriate elasticity, and in general, an elastic material such as silicone rubber is used as the soft material. Used.

According to the present invention, in addition to the sludge casting method,
It is also applicable when using a pair of upper and lower molds as shown in the figure.

[0034]

As described in detail above, according to the sludge casting molding method for a molded body with an opening of the present invention, a molding having an opening is molded by sludge casting molding using a molding die to which a soft material is attached. In this method, the soft material is stably and firmly fixed to the molding die to reliably prevent the soft material from falling off at the time of mold release, and at the time of soft material replacement, it can be easily removed to improve the molding work efficiency. , The production efficiency will be greatly improved.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of an essential part showing a method for carrying out a slurry casting method of a molded article with an opening according to claim 1 of the present invention.

FIG. 2 is an enlarged sectional view of an essential part showing another method for carrying out the sludge casting molding method for a molded article with an opening according to claim 1 of the present invention.

FIG. 3 is an enlarged sectional view of an essential part showing a method for carrying out a slurry casting molding method for a molded article with openings according to claim 2 of the present invention.

FIG. 4 is an enlarged sectional view of an essential part showing a method for carrying out a slurry casting molding method for a molded article with openings according to claim 3 of the present invention.

FIG. 5 is an enlarged sectional view of an essential part showing a method for carrying out a slurry casting method for a molded article with openings according to claim 4 of the present invention.

FIG. 6 is a cross-sectional view showing a slurry casting method of a molded product with an opening of the prior application.

FIG. 7 is a cross-sectional view showing a slurry casting method of a molded product with an opening of the prior application.

[Explanation of symbols]

 11 Mold 12 Through Hole 12A, 12B Large Diameter Hole 12C Groove 13, 14, 15, 16 Soft Material 13A, 14A, 16A Flange 15A Projection 17 Stopper 18 Screw

Claims (4)

[Claims] 1. A sludge casting molding method in which sludge is supplied to a molding space to deposit a deposit on the surface of a liquid absorbing mold and then the deposit is released to obtain a compact. A method for molding a molded article with an opening, comprising: attaching a non-water-absorbing soft material to a planned opening forming portion of the molding space surface of the molding die, and removing the soft material from the adhered object at the time of mold release. In the method for forming a molded article with an opening, the through hole is provided in the mold at a position where the soft material is attached, and the soft material is inserted into the through hole. A large diameter hole portion is formed on the outer surface side of the molding die, and the soft material is provided with a flange portion fitted into the large diameter hole portion. Molding method. 2. The method according to claim 1, wherein the one mold is rotatable so as to be capable of holding a soft material pressing posture covered by the flange portion and a posture separated from the flange portion. A sludge casting method of a molded body with an opening, characterized in that a material stopper is provided. 3. A sludge casting molding method in which sludge is supplied to the molding space to adhere the inoculum to the surface of the liquid-absorptive molding die and then the incision is released to obtain a compact. A method for molding a molded article with an opening, comprising: attaching a non-water-absorbing soft material to a planned opening forming portion of the molding space surface of the molding die, and removing the soft material from the adhered object at the time of mold release. In the method for forming a molded article with an opening, the through hole is provided in the mold at a position where the soft material is attached, and the soft material is inserted into the through hole. A groove is provided around the inner peripheral surface of the hole in the middle of the hole axial direction, and the soft material is provided with a protrusion fitted into the groove, and the molded article with an opening. Slurry casting method. 4. A sludge casting molding method in which sludge is supplied to a molding space to adhere a meat product to a molding space surface of a liquid absorbing mold, and then the mold product is released to obtain a molded product. A method for molding a molded article with an opening, comprising: attaching a non-water-absorbing soft material to a planned opening forming portion of the molding space surface of the molding die, and removing the soft material from the adhered object at the time of mold release. In the method for forming a molded article with an opening, the through hole is provided in the molding die at a position where the soft material is attached, and the soft material is inserted into the through hole. The material is provided with a flange portion that covers the edge of the through hole on the outer surface side of the molding die, and the flange portion is attached to one of the molding dies with a screw. Body casting method.