JPS6195902A - Casting molding method of pottery and molding die thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a ceramic manufacturing method, a casting method, and a mold for the same.

[Conventional technology]

In the casting method for ceramics, a mold is made of a highly water-absorbing material such as gypsum, and ceramic raw material slurry is injected into the molding recess, and the base material is adsorbed to the surface of the mold recess to an appropriate thickness. By the way, the remaining slurry is discharged, and when the base material in the mold further absorbs water into the mold and hardens, the mold is removed to obtain a finished product. Explanation of the firing and finishing process of the finished product will be omitted.

In ceramics, holes that reach the hollow part and other holes are obtained by molding by protrusions formed integrally with the molding recesses of the mold if the direction of the holes corresponds to the direction of mold removal. If the directions do not match, the mold is removed and then processed.

[Problem that the invention seeks to solve]

Drilling is performed on the finished product after demolding, but when drilling into a hollow part, drilling debris may fall into the hollow part, so if there are many holes, the direction of the 6 holes is Drilling holes where the angle is not perpendicular to the plane not only requires skill but also has extremely low productivity.Furthermore, when the six holes are oriented in different directions, it is difficult to ensure accuracy in the orientation of the holes.

[Means for solving problems]

In order to solve the above-mentioned problems when drilling a hole in a product after demolding by casting, the present invention provides holes in a molding recess of a water-absorbing mold in a portion corresponding to a hole to be provided in the molded product. Insert protrusions made of soft elastic material to form a mold, adjust the axial direction, inject ceramic raw material slurry into the mold, and adsorb a constant thickness of base material on the surface of the mold recess,
This is a ceramic casting method in which the mold is removed by a conventional method and holes are formed by the projections in the molded product.

The present invention also provides a ceramic casting in which a protrusion made of a soft elastic material for forming a hole is implanted in a molding concave portion of a mold made of a water-absorbing material in a portion corresponding to a hole to be provided in the finished product. This is a mold for molding.

[For production]

When ceramics are cast and molded using this mold, the molded product in the mold has protrusions that enter the holes that exist in the product, but since these protrusions are made of a soft elastic material, they are inclined. Even if the mold is removed, it can be removed smoothly without prying the hole during demolding.

〔Example〕

Fig. 1 shows one split mold (lower mold) of a mold for casting the upper edge 2 of the ceramic Western-style toilet bowl 1 shown in Fig. 4, as an example of a ceramic product, and Fig. 2 shows the split mold of Fig. 1. The other split mold (which is the upper mold) and fits opposite to the mold is made of plaster, which has high water absorption.

One split mold 3a and the other split mold 3b have recesses 4a and 4b that form the upper edge 2 of a Western-style toilet bowl by opposing each other.
is formed. 5a and 5b are notched recesses for fitting the mold for molding the water inlet and facing each other to form a cavity.

The bottom of the recess 4a of the split mold 3a has a large number of protrusions 6 along its entire length, and the length thereof is larger than the wall thickness of the molded product. Further, the protrusion 6a in the portion corresponding to the notched recess 5a is a horizontally long plate-like body. 6b
indicates the protrusion for the toilet seat mounting hole.

Each protrusion 7a of the split mold 3b is inserted into the hole 8a of the split mold 3a to properly fit the two split molds together.Although these protrusions were also made of soft elastic material, they were made of one piece of plaster. Good too.

A hole 9 at the bottom of the recess in the split mold 3a fits both split molds and serves as an injection hole for ceramic raw material slurry.

FIG. 3 is an enlarged view of the main part of the two split molds 3a and 3b fitted together. After injecting the ceramic raw material, a certain thickness of base material 10 is adsorbed onto the surface of the molding recesses 4a and 4b, and the remaining slurry is discharged. The protrusion 6 of the base material (formed product) 10 is shown.
The holes 11 formed by the reeds are for spraying flushing water onto the inner circumferential surface 12 of the toilet bowl 1. The holes are inclined so that the flushing water follows the slope of the inner circumferential surface 12, and the protrusions 6 are Therefore, the slope must be adjusted when planting. The holes formed in the base by the protrusions 6a are for forcefully flushing the discharged waste toward the sewage pipe, but are not shown.

〔effect〕

To form a hole in a ceramic product, a protrusion for forming the hole is provided in the recess of the mold, and the hole to be formed is inclined with respect to the demolding direction, so the protrusion for forming the hole is also inclined. Since this protrusion is made of a soft elastic material, the protrusion will bend and come out during demolding, and the hole formed may be chipped.

In addition, there is an effect that the inclination angle of the hole can be accurately determined.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of one split mold (lower mold) of a mold for forming the upper edge (frame) of a Western-style toilet bowl, which is an example of a ceramic product; The figure is a perspective view of the other split mold (upper mold), and Figure 3 shows the main part of the same split mold joined together with ceramic raw material slurry injected. FIG. 4 is an enlarged cross-sectional view showing the state in which the base material has been adsorbed to the surface of the mold recess and the slurry from the crosspiece has been discharged, and FIG. 4 is a perspective view of a Western-style toilet bowl equipped with the product obtained using the same mold. 3a, 3b... Split mold for casting ceramics, 4a. 4b... Recessed part for molding, 6, 6a... Implanted protrusion made of soft elastic material, 10... Adsorption base (formed product) kll
...hole

Claims (2)

[Claims] (1) A protrusion made of a soft elastic material for forming the hole is implanted in the molding recess of the water-absorbing mold at a portion corresponding to the hole to be formed in the molded product, and the axial direction is adjusted. A casting method for ceramics, which comprises injecting ceramic raw material slurry into a mold, adhering a certain thickness of base material to the surface of the recessed part of the mold, and removing the mold by a conventional method to form holes by the protrusions in the molded product. . (2) A ceramic casting characterized in that a protrusion made of a soft elastic material for forming the hole is implanted in a molding concave portion of a mold made of a water-absorbing material in a portion corresponding to a hole to be provided in the product. Mold for molding.