JPH069808B2 - Slurry casting method for moldings with openings - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a slurry casting method for molding 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. The present invention relates to a method for easily and efficiently manufacturing by a slurry casting method.

[Prior Art] Slurry (powdered granules for molding in the form of mud) is injected into the molding space formed in the mold of the upper mold and the lower mold, and is unnecessary in the slurry. A liquid casting method in which the liquid component (for example, water) is infiltrated into the molding die, and the remaining powdery granulated clay is inlaid on the inner surface of the molding die, and then the molding die is separated to take out the ingot. Is widely used today as a method for manufacturing various sanitary ware and the like.

Conventionally, by this sludge casting molding method, like the low tank 11 and the lid of the low tank of the flush toilet shown in FIG. 3,
When manufacturing a molded body having the openings 12, for example,
As shown in FIG. 4, the slurry 15 is supplied to the molding space between the upper mold 13 and the lower mold 14 to cause inking, and the inlaid material is released from the mold to first form a molded body having no opening. After that, a method of cutting out the opening forming portion of this molded body by a worker's manual work to form the opening is performed.

[Problems to be Solved by the Invention] In the above-mentioned conventional method, complicated work of cutting out an opening is required after the slurry casting, the number of working steps is large, and the manufacturing efficiency is low.

There is a risk of cracks and chips in the molded product during the cutting operation, resulting in poor product yield.

Since the work 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.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems and to provide a slurry casting method for a molded article with an opening, by which a molded article having an opening can be easily and efficiently manufactured by the slurry casting method. .

[Means for Solving the Problem] In the method for molding a slurry by molding of a molded body with an opening according to the present invention, the first molding die and the second molding die are aligned so as to face each other through a molding space, and molding is performed. After filling the molding space with a meat product by filling the space with sludge, separating the molds from each other, and molding the molded product with an opening by the slurry casting molding method that separates the meat product. A soft material is attached to the opening forming planned portion of the molding die to expand the diameter by pressing the soft material to the other molding die or the soft material attached to the other molding die, and then the sludge is supplied to expand the diameter. The soft material is reduced to the original state by releasing the pressing dies by separating the molds from each other, and thereby the gap between the meat product and the soft material is reduced. It is characterized by being formed and released.

[Operation] Since the soft material attached to the opening formation planned portion of the molding die causes the molding space of the portion other than the soft material to be inlaid, the molded body having the opening formed in the soft material is molded. To be done.

The soft material expands in diameter due to its elasticity when pressed against the other molding die or soft material, and contracts in its original state by releasing the pressing force (pressing force). For this reason, by performing the inking in the expanded diameter state and then returning to the original state, a gap is formed between the inlaid object and the soft material, and the inlaid object and the soft material are easily separated. Is possible.

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

FIG. 1 is a cross-sectional view showing a method for carrying out a sludge casting molding method for a molded article with an opening according to the present invention, and FIGS. 2 (a) to 2 (c) are enlarged views of main parts for explaining the molding process. Is an upper mold (that is, a first mold) 1 and a lower mold (that is, a second mold) 2
And so that they face each other through the molding space, and the sludge 3 is supplied to the molding space to incinerate the molding space (Fig. 2 (c)).
5), the molds are separated from each other, and the soft material 4 for forming openings is formed in a predetermined position on the bottom surface 1a of the upper mold 1, that is, in It is attached to the part where the opening is to be formed, and sludge molding is performed.

In this embodiment, the soft material 4 includes a wedge-shaped locking portion 4a,
It is composed of a cylindrical protrusion 4b, and is fitted and locked with the upper mold 1 at the locking portion 4a, and an opening is formed in the molded body obtained by the projection 4b.

In the slurry casting, first, the upper mold 1 and the lower mold 2 to which the soft material 4 is attached are matched so as to face each other through the molding space (Fig. 2 (a)), and the soft material 4 is lower mold. Press on 2. At this time, due to the elasticity of the soft material 4, the projecting portion 4b is compressed in the axial direction to expand its diameter, as shown in FIG. 2 (b). In this state, the slurry 3 is cast, the molding space is filled with the inlaid material 5, and then the upper mold 1 and the lower mold 2 are separated from each other. At this time, since the pressing force of the soft material 4 is released, the protruding portion 4b is reduced in diameter and returned to the original shape. A gap 6 is formed between the protrusion portion 4b and the radial protrusion portion 4b. Therefore, the soft material 4 and the meat product 5 are automatically peeled off, and the meat product 5 can be easily demolded.

In the method of the present embodiment, the protruding portion 4b of the soft material 4 is almost pressed with the wall thickness of the molded body to be manufactured in a state of being pressed against the lower mold 2, that is, in a state of being compressed and expanded in the axial direction. It is important to design the heights to be equal and the outer diameter to be almost equal to the inner diameter of the opening to be formed.

The molded body produced by such slurry casting molding,
After performing appropriate post-treatment such as polishing of the opening, it is sent to the next step.

In the above-mentioned sludge casting molding method of the present invention, when moldings having different opening sizes, moldings having different opening sizes can be easily manufactured by changing only the soft material 4 without changing the molding die. can do. In this case, the soft material 4 can be replaced very easily. Further, even when the soft material 4 is worn or broken, the soft material 4 can be replaced very easily.

In the present invention, the soft material attached to the first and / or the second mold has elasticity such that the cross-sectional area of the soft material is increased by applying a pressing force to the soft material, as compared with when the pressing force is not applied. Any material may be used, and the material thereof is not particularly limited. In the usual case, an elastic material such as silicone rubber is used as the soft material.

Further, in the method shown in FIGS. 1 and 2, an example in which such a soft material 4 is attached to the upper die (that is, the first molding die) 1 is shown, but the soft material 4 is attached to the lower die (that is, the first molding die). , Second molding die 2). Alternatively, the soft material may be attached to both the upper mold 1 and the lower mold 2, and the soft materials may be pressed against the upper mold and the lower mold to supply the sludge.

The locking portion between the soft material and the first mold and / or the second mold does not easily come off during molding, and the elasticity of the soft material during replacement of the soft material The structure is not limited to the wedge-shaped locking structure as shown in FIGS. 1 and 2 as long as the structure can be easily disengaged by utilizing. For example, a cylindrical locking portion may be used as long as the soft material and the molding die cannot be easily disengaged from each other due to friction between the surfaces. Further, the soft material and the molding die may be screwed together.

[Effects of the Invention] As described in detail above, according to the sludge casting molding method for a molded article with an opening of the present invention, a molded article having an opening can be easily and efficiently molded by sludge casting. For this reason, complicated cutting work is not necessary, and the work man-hour is reduced.

The problem of damage to the molded body due to cutting work is solved,
Product yield is improved.

The opening having a predetermined size can be formed reliably and accurately at a predetermined position.

The effects such as the above are exhibited, and the production efficiency is significantly improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view for explaining a slurry casting molding method according to an embodiment of the present invention, FIG. 2 is an enlarged view of an essential part showing a molding process, FIG. 3 is a perspective view of a raw tank, and FIG. 4 is a conventional method. FIG. 1 ... Upper mold, 2 ... Lower mold, 3 ... Slurry, 4 ... Soft material, 5 ... Membrane product.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoji Kinugawa 3-6, Koiemotocho, Tokoname City, Aichi Prefecture Inax Co., Ltd. (72) Inventor Yuichiro Kihara 1112-1 Hamacho, Kashima City, Saga Prefecture Kyushu Inax Co., Ltd. (56) References Japanese Patent Publication No. 57-45646 (JP, B2)

Claims (1)

[Claims] 1. A first molding die and a second molding die are matched with each other so as to face each other through a molding space, and sludge is supplied to the molding space to fill the molding space with a meat product, In a method of forming a molded article with an opening by a slurry casting molding method in which molding dies are separated from each other and a deposit is separated from each other, a soft material is attached to the opening formation planned portion of at least one molding die To expand the diameter by pressing it against the soft mold attached to the mold or the other mold, and then supply sludge to carry out inking in the expanded state, and then separate the molds from each other to apply the pressing force. When released, the soft material is reduced in diameter to its original state, thereby forming a gap between the inlaid object and the soft material and releasing the mold. Molding method.