A lining plate for lining a mould chamber in a sand molding machine. A base unit, is equipped with functional openings for injection of particle material, an air exhaust and fasteners. A layer of a synthetic resin material which is cast integrally onto the base unit faces the abrasive areas of said mould chamber. A method of manufacturing a lining plate comprising a base unit equipped with functional openings for injection of particle material, and/or air exhaust openings and fasteners. A method of refurbishing a lining plate in a sand molding machine comprising a base unit equipped with functional openings for injection of particle material, air exhaust openings and fasteners.

A lining plate for lining a mould chamber in a sand molding machine. A base unit, is equipped with functional openings for injection of particle material, an air exhaust and fasteners. A layer of a synthetic resin material which is cast integrally onto the base unit faces the abrasive areas of said mould chamber. A method of manufacturing a lining plate comprising a base unit equipped with functional openings for injection of particle material, and/or air exhaust openings and fasteners. A method of refurbishing a lining plate in a sand molding machine comprising a base unit equipped with functional openings for injection of particle material, air exhaust openings and fasteners.

A device for hardening foundry cores of a sand-containing molding material, wherein the core, for its hardening, is subjected in a core molding tool to a catalyst vapor/carrier gas mixture and subsequently to a pressurized air stream is provided. Each of the vapor/carrier gas and air stream are at a predetermined pressure and a predetermined temperature, wherein a heating and mixing stage, is connected to a container containing an organic catalyst in liquid form and to a pressurized air source. The liquid organic catalyst and the pressurized air are heated together in the heating and mixing stage. The device has a separate flushing line, wherein a first cutoff valve is arranged in the line to the heating and mixing stage, which is closed at the beginning of the flushing, and a second cutoff valve is arranged in the flushing line, which is open at the beginning of the flushing.

A device for hardening foundry cores of a sand-containing molding material, wherein the core, for its hardening, is subjected in a core molding tool to a catalyst vapor/carrier gas mixture and subsequently to a pressurized air stream is provided. Each of the vapor/carrier gas and air stream are at a predetermined pressure and a predetermined temperature, wherein a heating and mixing stage, is connected to a container containing an organic catalyst in liquid form and to a pressurized air source. The liquid organic catalyst and the pressurized air are heated together in the heating and mixing stage. The device has a separate flushing line, wherein a first cutoff valve is arranged in the line to the heating and mixing stage, which is closed at the beginning of the flushing, and a second cutoff valve is arranged in the flushing line, which is open at the beginning of the flushing.

A core molding machine which can be made smaller while having a favorable core sand filling property is provided. The machine comprises a core box having a pair of laterally separable dies and a sand filling device, having a blow head disposed under the core box, for filling the core box with core sand directed upward from the blow head; the blow head having a sand blow chamber for guiding the core sand to the core box while being connected to the core box and a sand storage chamber communicating with the sand blow chamber; the sand filling device having a compressed air supply unit for supplying a compressed air for blowing the core sand into the core box and an aeration air supply unit for supplying an aeration air for floating and fluidizing the core sand within the sand blow chamber.

A core molding machine which can be made smaller while having a favorable core sand filling property is provided. The machine comprises a core box having a pair of laterally separable dies and a sand filling device, having a blow head disposed under the core box, for filling the core box with core sand directed upward from the blow head; the blow head having a sand blow chamber for guiding the core sand to the core box while being connected to the core box and a sand storage chamber communicating with the sand blow chamber; the sand filling device having a compressed air supply unit for supplying a compressed air for blowing the core sand into the core box and an aeration air supply unit for supplying an aeration air for floating and fluidizing the core sand within the sand blow chamber.

A device and process for hot air jet dewaxing and reclaiming wax composition from patter for investment casting shell making. The device includes a hot air supply mechanism, a hot air jet dewaxing mechanism, a liquid wax collection mechanism, a liquid wax reclaiming mechanism, and a bearing platform. A shell for investment casting is installed on the bearing platform. A hot air outlet end of the hot air supply mechanism is in fluid communication with a hot air inlet end of the hot air jet dewaxing mechanism, and an injector connected with hot air outlet end of the hot air jet dewaxing mechanism extends into a cavity of the shell and faces the body of a wax pattern. Liquid wax generated in the cavity of the shell flows under the action of self-gravity into the liquid wax collection mechanism from its liquid wax inlet end.

A device and process for hot air jet dewaxing and reclaiming wax composition from patter for investment casting shell making. The device includes a hot air supply mechanism, a hot air jet dewaxing mechanism, a liquid wax collection mechanism, a liquid wax reclaiming mechanism, and a bearing platform. A shell for investment casting is installed on the bearing platform. A hot air outlet end of the hot air supply mechanism is in fluid communication with a hot air inlet end of the hot air jet dewaxing mechanism, and an injector connected with hot air outlet end of the hot air jet dewaxing mechanism extends into a cavity of the shell and faces the body of a wax pattern. Liquid wax generated in the cavity of the shell flows under the action of self-gravity into the liquid wax collection mechanism from its liquid wax inlet end.

A sand core making machine that includes a hopper having a hollow body with an inner surface delimiting a passageway for a material used in the manufacture of a sand core. The hopper includes a plurality of breaker assemblies with each breaker assembly having at least one string. The ends of a string are attached to corresponding attachment points of the inner surface of the hollow body, such that the strings are arranged in a flow passage of the material. At least two breaker assemblies are spaced apart such that the two breaker assemblies interact with each other to break lumps of the material supplied to the hopper when the hollow body is shaken.

A sand core making machine that includes a hopper having a hollow body with an inner surface delimiting a passageway for a material used in the manufacture of a sand core. The hopper includes a plurality of breaker assemblies with each breaker assembly having at least one string. The ends of a string are attached to corresponding attachment points of the inner surface of the hollow body, such that the strings are arranged in a flow passage of the material. At least two breaker assemblies are spaced apart such that the two breaker assemblies interact with each other to break lumps of the material supplied to the hopper when the hollow body is shaken.