JP2007137043A - Manufacturing method of ceramic screw type lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that the inner side of a ceramic screw type lid of a screw typed rugged shape, the base of which must be manufactured from a plaster mold type material, enables no removal of the inside mold or no molding in the case of the conventional plaster mold divided into inside and outside, and that it takes much labor and time for postadhesion processing even if the right and left half parts are separately molded with the plaster mold. <P>SOLUTION: The precision plaster molds for the inside and the outside of the lid are molded by adapting to the outside of a threaded mouth of a container on which the lid is put. Slip is cast into the mold, half-dried, and the outside mold (Fig. 1-A) is removed first. The outside surface of the material (Fig. 1-C) is dried to the extent of not leaving the marks even it is touched on the outside surface, and the plaster mold (Fig. 1-B) of the inside and the material (Fig. 1-C) are rotated in the screw type together to remove them from the mold. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for producing a ceramic screw-type lid for sealing a container.

  Speaking of screw-type lids, they are mainly made of metal such as plastic or aluminum. Gypsum molds are used to mold ceramic fabrics, but those with complicated shapes on the outside can be molded, but it is very difficult to die with bumps on the inside. Therefore, the traditional ceramic lids are mainly placed along the groove, and are covered, and there are some contrivances such as stoppers, but when sealed, other silicone rubber, cork, plastic, metal, etc. There is no other choice but to rely on materials.

  When making this screw type lid made of porcelain, it is necessary to mold the dough with a gypsum mold, but in the method of dividing the normal gypsum mold and taking the mold, the inner mold is a screw-shaped uneven shape, so it comes off from the dough In particular, it is impossible to reasonably with a small size. Alternatively, there is a method of dividing the lid separately on the left and right sides, and cutting each mold separately, but when bonding the divided fabric, it becomes easy to distort and at the same time, scraping off the extra soil streaks attached to the bonding surface etc. It is difficult.

  Although it is not possible with the usual method, we made use of the feature of this screw type and developed the fabric forming method as follows by trial and error.

  To produce a ceramic screw-type lid, a precise plaster mold is formed on both the inside and outside of the lid in accordance with the outside of the screw mouth of the container on which the lid is to be covered. Pour mud into the mold, semi-dry, and first remove the outer mold (FIG. 1-A). After the fabric (Fig. 1-C) is further dried to the extent that no trace remains when touched, the inner plaster mold (Fig. 1-B) and the fabric (Fig. 1-C) are both screw-type rotated. Let me remove it from the mold.

  Being able to manufacture ceramic screw-type lids, which cannot be manufactured with common sense, is a great advantage in the industry for supplying all ceramic sealed containers to the market. Up until now, ceramic lids have been made sealable by bonding cork and rubber, but the cork and rubber are exhausted, making it difficult to use ceramic containers that can no longer be sealed. However, if both the container and the lid are made of ceramic, they will look beautiful and can be used repeatedly semipermanently unless they are damaged by a strong impact. In terms of cost, it eliminates the need for cork and rubber, and also eliminates the need for bonding them to achieve low cost.

The important point of the present invention is the timing at which the inner gypsum mold (FIG. 1-B) is screwed to remove the mold when the dough is molded. First, mud is poured into the gypsum mold in one set shown in FIG. Gradually, the gypsum mold absorbs the moisture of the mud, and the dough hardens and shrinks. If the shrinkage progresses too much, the inner plaster mold does not rotate and does not come out, so this inner plaster mold is made of a special plaster mold that is difficult to absorb water, delays moisture absorption on the inner side of the fabric, and keeps moisture As a result, slippage is improved, and both the fabric and the gypsum mold on the inner side are easy to rotate in a screw manner.
Moreover, it can seal completely by using packing for the inner bottom of the finished product after baking.

  It is the figure which represented how to combine the gypsum type | mold which shape | molds the material | dough of a screw-type lid with the cross section and the side surface.   B. shown in FIG. It is the three-dimensional view which made the side of an inner plaster mold easy to understand.   A. of FIG. It is the whole outer surface figure of an outside plaster mold.   C. of FIG. It is the whole outer surface figure of the cloth part of a screw type lid.

Claims (1)

  To produce a ceramic screw-type lid, a precise plaster mold is formed on both the inside and outside of the lid in accordance with the outside of the screw mouth of the container on which the lid is to be covered. Pour mud into the mold, semi-dry, and first remove the outer mold (FIG. 1-A). After the fabric (Fig. 1-C) is further dried to the extent that no trace remains when touched, the inner plaster mold (Fig. 1-B) and the fabric (Fig. 1-C) are both screw-type rotated. Let me remove it from the mold.

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