Abstract: 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.

Abstract: The present invention relates to 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, each at a predetermined pressure and a predetermined temperature, wherein a heating and mixing stage, which can be upstream of the core molding tool, is connected to a container containing an organic catalyst in liquid form and to a pressurized air source, wherein the device does not have a preheater, so that the liquid organic catalyst and the pressurized air are heated together in the heating and mixing stage, and 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.

Abstract: A foundry core or mold comprised of sand admixed with an inorganic binder is hardened by passing a treatment gas through a first heater and heating it therein to a relatively low temperature and, in a first hardening stage, passing the gas at the low temperature from the first heater through a second heater and heating it therein to a relatively high temperature and thereafter passing the gas at the high temperature from the second heater to and through a core box holding the core or mold to harden same. Thereafter in an after-treatment stage passing the gas at the low temperature from the first heater substantially directly to and through the core box holding the core or mold to after treat same.

Abstract: A foundry core or mold comprised of sand admixed with an inorganic binder is hardened by passing a treatment gas through a first heater and heating it therein to a relatively low temperature and, in a first hardening stage, passing the gas at the low temperature from the first heater through a second heater and heating it therein to a relatively high temperature and thereafter passing the gas at the high temperature from the second heater to and through a core box holding the core or mold to harden same. Thereafter in an after-treatment stage passing the gas at the low temperature from the first heater substantially directly to and through the core box holding the core or mold to after treat same.

Abstract: The invention relates to a method for hardening foundry cores from sand-containing molding materials. The core, for the purpose of hardening it, is subjected to a catalyst vapor/gas mixture in a core molding tool (20). and then to a pressurized air flow, at a predetermined pressure and predetermined temperature, via a gassing plate (30) that can be coupled to the core molding tool in a gas-tight manner. The amine is, preferably during core injection, supplied to a heating and mixing stage (17) in liquid form and in a dosed manner and converted to its gaseous state. Once the gassing plate has been coupled to the core molding tool in a gas-tight manner, heated pressurized air is guided through the heating and mixing stage (17) charged with the amine gas within a predetermined time interval and with proportional pressure increase for gassing the tool in a time-controlled manner. From there, the gas is guided as a catalyst vapor/gas mixture through the sand-containing molding material in the core molding tool.

Abstract: The invention relates to a method for hardening foundry cores from sand-containing molding materials. The core, for the purpose of hardening it, is subjected to a catalyst vapor/gas mixture in a core molding tool (20). and then to a pressurized air now, at a predetermined pressure and predetermined temperature, via a gassing plate (30) that can be coupled to the core molding tool in a gas-tight manner. The amine is, preferably during core injection, supplied to a heating and mixing stage (17) in liquid form and in a dosed manner and converted to its gaseous state. Once the gassing plate has been coupled to the core molding tool in a gas-tight manner, heated pressurized air is guided through the heating and mixing stage (17) charged with the amine gas within a predetermined time interval and with proportional pressure increase for gassing the tool in a time-controlled manner. From there, the gas is guided as a catalyst vapor/gas mixture through the sand-containing molding material in the core molding tool.

Abstract: A device for hardening a core mass containing sand contained within a foundry core forming tool includes a mixing device in communication with the foundry core forming tool for introducing a flow of a carrier gas stream enriched by catalyst vapor into the core mass containing sand; a first runnings system including a catalyst receiver tank containing catalyst, a first runnings pipe in communication with the catalyst receiver tank and the mixing device, a pump provided in the first runnings pipe for pumping catalyst from the catalyst receiver tank through the first runnings pipe, valve device provided in the first runnings pipe for dispensing catalyst into the mixing device, and a flow meter provided in the first running pipe between the pump and the valve device; a compressed air source in communication with the mixing device for providing a carrier gas stream comprised of air thereto; and programmed control device for controlling the valve device of the first runnings system and the compressed air source; wh