CS199863B1 - Sectional mould for objects made by galvanoplastic - Google Patents

Description

The invention relates to a split mold for articles made by the galvanoplastic method, in particular statues and busts. Metal sculptures and busts have so far been produced in such a way that the original sculpture or bust is made of non-metallic material; used to make a sand mold into which metal is cast. This creates a metal original sculpture or bust. Making sand molds is very expensive and costly. At the same time, this process is very demanding on metal consumption. The statues or bust castings are then mechanically worked, cleaned, isolated and the like. If the sculpture is cast from individual parts, it is necessary to weld these parts and then laboriously work, and in some cases, these are still noticeable. The amount of metal required for casting. It's considerable.

These drawbacks are overcome by the split mold of the present invention intended for articles made by the galvanoplastic method, in particular statues and busts. The split mold is made of plastic or silicone rubber. The principle of the invention consists in that the conductive separating surfaces of the mold are provided with a coating of conductive sealant or varnish.

The advantages of the molded part according to the invention lie in particular in the accuracy of the workpiece, e.g. a statue, and in the removal of the seam of the separation plane. The split mold according to the invention is used for making sculptures and busts by a galvanoplastic method, in which a negative copy of a sculpture or bust is made from a non-metallic original by casting into a plastic or silicone rubber, preferably Lukoprene. Sculptures usually have to be cast in several parts and divider

199 863

199 863 areas. The functional parts of the molds thus prepared, including their separating surfaces, are conductive, in some known manner, i.e., with a conductive lacquer, or chemically silver-plated, or chemically copper-plated, and the like. These conductive separating surfaces are then provided with a layer of conductive sealant or lacquer and the mold is immediately assembled and joined by means of locking elements. In this way a negative cavity model of the future work is achieved. After attaching the suspension hook and the conductive contacts, the mold is suspended in the plating bath as a cathode. The anode in the mold cavity consists of a platinum sheet or wire shaped to a suitable shape, attached to a plastic carrier. Advantageously, the anode support may be a tube through which an electrolyte is injected into the mold cavity. The electrolyte flow removes hydrogen from the mold cavity and replaces the spent electrolyte with an electrolyte with sufficient anions.

After the electrolysis process, the mold is removed from the bath and after several rinses the mold is disassembled and the finished work is removed. The surface of the sculpture or bust can advantageously be further surface treated, for example patina, metallized or polished.

In this way, sculptures and busts were successfully made under laboratory conditions.

Claims (1)

Cut mold for articles made by the galvanoplastic method, in particular statues and busts, made of plastic or silicone rubber, characterized in that its conductive separating surfaces are provided with a coating of conductive sealant or varnish.