Method for momentarily heating the surface of a mold and system thereof

A method for momentarily heating the surface of a mold, comprising the steps of:

• momentarily heating upper and lower molds by a variable electric resistance heater using current generated by a voltage generator after causing the upper and lower molds to come close to each other;
• injecting molten casting material from a casting material feeder and molding it after raising the heated lower mold to and engaging the heated lower mold with the upper mold and allowing the molded product to cool in the close mold;
• supplying compressed air from a compressed air supply line to the upper and lower molds through a compressed air supply line to cool a molded product;
• and
• ejecting the molded product after cooling the molded product sufficiently.

A method for momentarily heating the surface of a mold, comprising the steps of:

• momentarily heating upper and lower molds by a coating type electric resistance heater using current generated by a voltage generator after causing the upper and lower molds to come close to each other,
• injecting molten casting material from a casting material feeder and molding it after raising the heated lower mold to and engaging the heated lower mold with the upper mold and allowing the molded product to cool in the close mold;
• supplying compressed air from a compressed air supply line to the upper and lower molds through a compressed air supply line to cool a molded product;
• and
• ejecting the molded product after cooling the molded product sufficiently.

A system for momentarily heating the surface of a mold, comprising:

• a casting material feeder for supplying molten casting material;
• upper and lower molds for forming a predetermined shaped cast;
• first and second cores disposed between the upper and lower molds;
• a water-cooled system for cooling a heated mold by injecting cooling water to the heated mold;
• an injection molding control for controlling the upper and lower molds;
• an air and gaseous fuel mixture and supply unit for supplying compressed air and gaseous fuel simultaneously;
• a gaseous fuel mixture and supply control for controlling the operation of the air and gaseous fuel mixture and supply unit;
• an interface for interfacing the injection molding control and the gaseous fuel mixture and supply control;
• and
• a control panel for visually displaying the control, condition and operation of the components of the system.

A system for momentarily heating the surface of a mold, comprising:

• a casting material feeder for supplying molten casting material;
• upper and lower molds for forming a predetermined shaped cast;
• first and second cores disposed between the upper and lower molds;
• a water-cooled system for cooling a heated mold by injecting cooling water to the heated mold;
• an injection molding control for controlling the upper and lower molds;
• a voltage generator for generating voltage of a predetermined level;
• a variable electric resistance heater for heating the cores using current applied from the voltage generator, said a variable electric resistance heater being disposed between the upper mold and the first core;
• a controller for controlling the compressed air supply line and the voltage generator;
• an interface for interfacing the injection molding control and the gaseous fuel mixture and supply control;
• and
• a control panel for visually displaying the control, condition and operation of the components of the system.

A system for momentarily heating the surface of a mold, comprising:

• a casting material feeder for supplying molten casting material;
• upper and lower molds for forming a predetermined shaped cast;
• first and second cores disposed between the upper and lower molds;
• a water-cooled system for cooling a heated mold by injecting cooling water to the heated mold;
• an injection molding control for controlling the upper and lower molds;
• a voltage generator for generating voltage of a predetermined level;
• a electric resistance heater for heating the cores using current applied from the voltage generator, said a electric resistance heater being coated on the first core;
• a controller for controlling the compressed air supply line and the voltage generator;
• an interface for interfacing the injection molding control and the gaseous fuel mixture and supply control;
• and
• a control panel for visually displaying the control, condition and operation of the components of the system.