DE1759735C3 - Stacks of molds for casting handles and similar objects from ceramic masses - Google Patents

Description

35

The invention relates to a stack of molds for casting handles and similar objects Made of ceramic masses composed of several forms of plaster or similar absorbent materials and in which each individual mold consists of two mold halves.

In a known stack of molds of this type, the two-part molds that are above and below the entire surface are flat, placed directly on top of each other, so that between the individual There are no gaps between shapes. When pouring the ceramic slip into the stack of molds the cavities of the molds to form the moldings are filled by the slip and im Following this, water is sucked up from the slip by the porous mold halves. On the outer On the surface of the molds, part of the absorbed water is released into the air through evaporation.

Long standing times of the known stacks of molds are required to release the moisture into the air, since the water is only discharged via the relatively narrow outer surface of the molds can be. So up to now one was forced to work for one that extended over the whole working day Casting company to have a relatively large set of foils in circulation. Using Smaller sets of molds, however, had to be countered more often because of insufficient drying dry mold sets are replaced.

The invention is therefore based on the object of providing a stack of molds of the type mentioned at the beginning to train that the water absorbed by the individual molds when pouring the moldings can evaporate faster.

This object is achieved according to the invention in that between two adjacent forms in each case an intermediate ring is provided so that the individual shapes are spaced from one another

As a result, the free surface of the individual shapes is no longer on their narrow outer surface limited, but significantly enlarged in comparison. Also on the top and bottom of one Heat can therefore be supplied to the mold and evaporated moisture can be removed. As a result come: a smaller set of molds is used, a casting carousel heated with warm air being advantageously used can be.

In a preferred embodiment of the invention, at least one of the two mold halves is attached Each individual mold has an intermediate ring on its side facing away from the molding to be cast or a part of the intermediate ring forming seed / cast on or pressed on. Depending on the design then forms such an approach or two opposing approaches form the one mentioned Intermediate ring, through which the individual shapes are kept at a distance from one another. If the intermediate ring is only formed by the approach on one mold half, the surface can the other half of the mold must be designed as before. If, on the other hand, both mold halves be provided with a shoulder, this has the advantage that all mold halves are the same.

Another embodiment of the stack of molds according to the invention can be characterized be that the intermediate ring is made separately from the molds and made of plaster, an elastic plastic or rubber. In this case, a separate production of the intermediate ring is made possible, which can be particularly beneficial in certain circumstances.

Finally, the invention can be embodied in that for better stability of the stack of molds each one of the two mold halves of a mold has three cams, which by a small amount are arranged set back from the outer edge of the mold half and with the mold adjacent to them stay in contact. This measure improves the stability of the stack of molds, which is particularly beneficial when the shapes are relatively wide acts.

Embodiments of the invention are explained in more detail below with reference to the drawing. It shows

Fig. 1 is a stack of molds in section, in which both mold halves of a mold have an approach,

F i g. 2 shows a stack of molds in section, in which only one mold half of a mold has an approach having,

F i g. 3 shows a stack of molds in section, in which separately manufactured intermediate rings are used.

The molds placed on top of each other to form a stack of molds each consist of an upper mold half 1 and a lower mold half 2, which are placed on top of one another with smooth surfaces.

According to FIG. 1 has both the upper mold half 1 and the lower mold half 2 a cast

or pressed-on approach 3, wherein both mold halves 1 and 2 can be designed completely the same.

According to FIG. 2, the upper mold half 1 has a flat surface at the top and only the lower mold half 2 has an approach 3, which here forms the entire intermediate ring.

According to FIG. 3 has neither the upper mold half 1 nor the lower mold half 2 an approach to formation an intermediate ring, but this one is separated made from molds. The intermediate ring 3 'shown in the upper part of FIG. 3 is intended to be made of rubber

or an elastic plastic and have a centering bead 5 at the top and bottom. Through the centering beads 5 are intended to achieve better adjustment of the shapes stacked one on top of the other. In the lower part of FIG. 3 drawn, separately manufactured intermediate ring 3 ″, however, has none Centering bead and should be made of plaster of paris.

F i g. 3 also shows that the lower mold halves 2 are provided with cams 4 on their underside through which the stability of the stack of molds is improved.

1 sheet of drawings

Claims (4)

Patent claims: 1. Stacks of molds for casting handles and similar objects from ceramic masses, which is composed of several forms of plaster or similar absorbent materials and in which each individual mold consists of two mold halves, characterized in that, that between two adjacent forms there is an intermediate ring so that the individual shapes are arranged at a distance from one another. 2. stack of molds according to claim 1, characterized in that that on at least one of the two mold halves (1 or 2) of each individual mold their side facing away from the molding to be cast an intermediate ring or part of the Intermediate ring forming approach (3) is cast or pressed. ao 3. stack of molds according to claim 1, characterized in that the intermediate ring of the Forms is made separately and consists of plaster of paris, an elastic plastic or rubber. 4. stack of molds according to one of claims 1 to 3, characterized in that for better Stability of the stack of molds in each case one of the two mold halves (2) of a mold three cams (4), which is arranged set back by a small amount from the outer edge of the mold half and are in contact with the shape adjacent to them.