Classifications

• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
  • C03B19/00—Other methods of shaping glass
  • C03B19/09—Other methods of shaping glass by fusing powdered glass in a shaping mould
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
  • C03B25/00—Annealing glass products
  • C03B25/02—Annealing glass products in a discontinuous way

Definitions

• the invention deals with a method of production of a hollow, thick-walled three-dimensional glass sculpture formed by a corpus with a central cavity created within the sintering and fusing process.
• This corpus has at least on the outer part of its surface a sculpture in a form of spatial frieze of a relief art motif created within the sintering and fusing process which is visually accessible along all of its perimeter.
• the character of the existing glass sculptures is mostly a relief sculpture of a more or less superficial character intended for a merely one-sided - i.e. front side perspective.
• the object of the Chinese utility design pattern n. CN2354792 is the coloured relief glass sculpture with a potential fluorescent effect. Its relief motif is partly transparent and partly coloured with pigments, or alternatively also with fluorescent ingredients.
• the sculpture may be used as an art object (parallel of painting), decorative building element (part of the wall, partition) or even as an industrial object - e.g. screen monitor.
• the object of another Chinese utility design pattern n. 2148883 is a decorative object made by a combination of relief glass and a light.
• a piece of glass with a relief sculpture is fixed on the front part of the light source of the lamp so that the light beams may radiate through the glass relief and thus create specific visual effects.
• the above mentioned hollow three-dimensional glass sculpture production method is subject to the patent of the Czech Republic n. 305112.
• the spatial model of the sculpture is first made out of sculpting modelling material, including the surface spatial relief art motif.
• the outer as well as inner part of the future mould is made already with the inclusion of the corresponding excess for shrinkage, the mould is completed and thermally conditioned.
• the glass melt is cast into the mould and by the use of fusing processes with a specific temperature curve comprising also the cooling curve the glass sculpture itself is made.
• the sculpture is taken out, cleaned and the surface is finished by refining processes.
• the production method of the hollow thick-walled three-dimensional glass sculpture based on the invention contributes to the elimination of the above mentioned drawbacks.
• Such sculpture is, similarly to the three-dimensional glass sculpture according to utility design pattern of the Czech Republic n. 26941, formed by a corpus with central cavity created within the sintering and fusing process, and has at least on a part of its outer body a created sculpture in the form of spatial frieze of a relief art motif produced within melting process which is visually accessible all along its perimeter.
• a spatial model of the sculpture is first made out of sculpting modelling material, including the surface spatial relief art motif. Then by moulding of this model the outer as well as the inner part of the future mould is made already with the inclusion of the corresponding excess for shrinkage, the mould is completed and, if necessary, thermally conditioned. Throughout the combination of sintering, fusing or alternatively devitrificating processes the glass sculpture itself is then made. Following the dismantling of the moulding set the sculpture is taken out, cleaned and the surface is finished by refining processes.
• the substance of the invention consists in the fact that the glass grit consisting of particles with a homogeneous chemical composition and thus characterized by a viscosity curve of homogeneous glass, and which is free from powdery content so that the minimal size of the particles is 3mm, is dosed in cold conditions into the completed unwarmed mould. After that the sintering, fusing and, alternatively, devitrificating processes take place when the sculpture is created by co- action of natural gravitation and a specific thermal curve containing the following characteristic phases of heating and cooling.
• the glass grit may consist of ground glass waste of a homogeneous chemical composition character ized by a viscosity curve.
• the time of keeping interval at the fusing temperature according to the point c) of the specific tem perature curve of the heating up is advantageous of 1 to 3h depending on the character of the viscosity curve of the glass.
• the upper cooling temperature according to the point e) of the specific temperature curve of the heating and cooling bound with the transformation point of glass T g [°C] raised by l0°C is for the soda-potash crystals in the range of temperatures between 490 up to 530 °C, for lead glasses this temperature is lower, and for sheet glass the temperature is higher.
• the sufficient time of keeping interval at the cooling temperature according to the point f) of the specific temperature curve of the heating and cooling is for an article with a wall thickness of up to 5cm approximately one hour. There is no general formula for the calculation of this interval because it depends on the equalization of the temperatures in the furnace itself, in the mould and subsequently in the article itself.
• the cooling interval of l00°C is generally used for the calculation.
• a time reserve is used of up to half the rate of cooling than is the value calculated according to the point g) of the specific temperature curve of the heating and cooling.
• the hollow, thick-walled three-dimensional glass sculpture in the exemplary realization is formed by a hollow cylindrical corpus.
• This cylindrical corpus contains a central cavity formed within the process of melting and at least on the part of its outer surface is a created sculpture in the form of spatial frieze of a relief art motif produced directly within the melting process which is visually accessible from more sides.
• a spatial model of the sculpture from the sculpting modelling material is made first, including the surface spatial relief art motif. Then follows its moulding - casting of the mould from the mixture of plaster and glass sand at a weight ratio of 1: 1. Thus an outer as well as inner part of the future mould is made also with an inclusion of the excess for shrinkage.
• the mould is reinforced against breaking with a reinforcement from the wires or wire mesh, cleaned from the remains of the modelling material, completed and dried.
• Glass grit which in the exemplary realization consists of glass waste of homogeneous chemical composition - concretely on the basis of soda-potash crystal (see pict. 2 curve n. 1), is dosed in cold conditions into the completed unwarmed mould.
• the glass grit must be free from powdery content so that the minimal size of the contained particles is 3mm.
• the created glass sculpture is after the dismantling of the mould set taken out, cleaned and its surface finished with refining processes depending on available technologies for the glass treatment: cutting, sanding, grinding, polishing etc.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Manufacturing & Machinery (AREA)
• Glass Compositions (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=66993979

Family Applications (1)

Country Status (2)

Citations (4)

Family Cites Families (4)

• 2017
  • 2017-12-21 CZ CZ2017-824A patent/CZ2017824A3/cs unknown
• 2018
  • 2018-12-19 WO PCT/CZ2018/050062 patent/WO2019120340A1/en active Application Filing

Patent Citations (4)

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