Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22C—FOUNDRY MOULDING
  • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
  • B22C7/02—Lost patterns
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22C—FOUNDRY MOULDING
  • B22C23/00—Tools; Devices not mentioned before for moulding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
  • B23K37/02—Carriages for supporting the welding or cutting element

Definitions

• the present invention concerns an assembly of a gas torch and a housing structure of said gas torch, in particular for a workbench for manual operations of preparation of wax models and clusters of wax models, in a process of manufacturing products by means of lost wax micro casting.
• the components are manufactured by preliminarily preparing a mould in which melted wax is injected and solidifying by cooling, makes it possible to obtain a model identical to the final component to be produced.
• the wax model is obtained by injection using piston presses. These machines inject molten wax into a mold according to well-defined parameters that depend on the geometry of the part and therefore on the complexity of the mold to be filled.
• cluster typically, many models are brought together to form a so-called cluster.
• the clusters are then covered with a shell made up of a plurality of layers of refractory material, in order to give the shell the necessary toughness.
• Each refractory layer is formed by means of three main steps:
• the component obtained by "single crystal” (SX) solidification is manufactured by placing the shell of refractory material in a vacuum furnace and exactly on a water-cooled platform to begin the solidification process.
• the molten metal is cast into the shell, and the "solidification rate” and “direction” are controlled by the speed of extraction of the melting chamber, and by a helical selector that, when the shell is removed from the oven, selects a single crystal, from which the component will be formed.
• the ceramic shell After cooling of the metal, the ceramic shell is removed by crushing it and then the individual components are finished.
• this instrument is used to heat the spatulas for wax modelling, to flame waxes and to heat the platinum pins which, according to particular processes, must be able to be embedded in the wax until they touch the core.
• the gas torch has the characteristic of being very handy, having the handle made of bakelite and the end part in brass, and is connected with a rubber tube, specific for the gas, upstream of which there are two regulators that regulate the flow of gas and air
• the gas torch is constantly lit for a whole work cycle, so it is important to orient the flame well and position it in a stable position, in order to avoid possible accidents.
• torch-holder which according to prior solution was made up of a U-bent bracket with spade terminal on both sides and a flame stop plate, consisting of an L-bent metal sheet, placed in front of said torch-holder.
• the problem with this solution was that the gas torch, not being sufficiently stable, could turn around in relation to its intended position, endangering the safety of operators and the flammability of surrounding objects.
• both torch-holder and flame stop plate were fixed to the work surface.
• this solution had limitations, given the position of the torch-holder and flame stop plate very close to that of the wax melting device, located behind the former, with the consequence that the wax melting device was also limited in its movements, making cleaning, maintenance and calibration difficult.
• the solution according to the present invention which aims to provide an assembly of a gas torch and a housing structure of said gas torch is introduced, in particular for a workbench for manual operations of preparation of wax models and clusters of wax models, in a process of manufacturing products by means of lost wax micro casting, apt to solve all problems associated with the use of the previous torches and torch-holders, in particular by ensuring structural integration of the flame stop plate in the structure of the torch-holder, a non-permanent and instantaneously removable torch-holder attachment to the work surface, and a non-permanent and instantaneously removable torch-holder attachment to the torch-holder.
• the aim of the present invention is therefore to provide an assembly of a gas torch and a housing structure of said gas torch, in particular for a workbench for manual operations of preparation of wax models and clusters of wax models, in a process of manufacturing products by means of lost wax micro casting, which makes it possible to overcome the limits of the torch holders used in production processes by means of lost wax micro-casting using known technology and to obtain the technical results described above.
• a further aim of the invention is that said assembly of a gas torch and housing structure of said gas torch can be realized with substantially low costs, both in terms of production costs and operating costs.
• the last aim of the invention is to propose an assembly of a gas torch and a housing structure of said gas torch, in particular for a workbench for manual operations of preparation of wax models and clusters of wax models, in a process of manufacturing products by means of lost wax micro casting which is simple, safe and reliable.
• said housing structure comprises: two brackets with a spade-like extremity, in correspondence of said spade-like extremity of each of said brackets removable coupling means being placed; a base, said base defining a spacing zone, on the side of said spacing zone being placed more distant from said brackets a flame stop plate being present;
• said gas torch comprises, on each of its extremities, removable coupling means apt to cooperate with said removable coupling means of said brackets.
• said removable coupling means of each of said brackets comprise a magnet and said removable coupling means of said gas torch comprise a bushing/ring of ferromagnetic material.
• said base is provided with removable coupling means of said base with a work surface, which preferably comprise a magnet.
• said housing structure is open in its upper part and on one or on both sides.
• brackets and said flame stop plate can be fixed to said base or integral with said base.
• the housing structure 10 is indicated as a whole with the numerical reference 10 and being constituted by a single object, made of metal material, combining a torch-holder and a flame stop plate.
• the housing structure 10 comprises two brackets 1 1 , with a spade-like extremity 12, for the housing of a torch, not shown.
• a magnet 13 is fixed, the function of which is to collaborate with a steel bushing/ring on each of the two ends of a gas torch according to the present invention, so as to keep the torch in a stable position, but without preventing it from being caught, thanks to the magnetic attraction of the two magnets on the steel bushings/ring of the gas torch.
• the housing structure 10 additionally comprises a third magnet, placed at the base 14 of the housing structure 10, to form a non- permanent and instantaneously removable attachment of the housing structure 10 to the work surface, which in turn is normally made of steel already according to the prior art.
• the two brackets 1 1 of the housing structure 10 are fixed or made integral with the base 14, the latter also defining a spacing zone 15, on the side of which which is opposite to said brackets 1 1 a flame stop plate 16 being fixed or made integral with the base 14.
• housing structure 10 is open to allow for a space, accessible from above, between said brackets 1 1 and said flame stop plate 16. In this way, the housing structure 10 allows to carry the spatulas to be heated during the operations carried out on the workbench, directly against the flame, supporting the spatulas from top to bottom without any problems.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Molds, Cores, And Manufacturing Methods Thereof (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=58609752

Family Applications (1)

Country Status (2)

Citations (3)

• 2016
  • 2016-12-05 IT IT102016000122904A patent/IT201600122904A1/it unknown
• 2017
  • 2017-12-04 WO PCT/IT2017/050001 patent/WO2018104977A1/en active Application Filing

Patent Citations (3)

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