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

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

• opening upper and lower molds and a core of the mold, and supplying gaseous fuel;
• injecting and igniting the gaseous fuel from the upper and lower molds after allowing the upper and lower molds to come close to each other at a predetermined distance;
• heating the core for a predetermined time period;
• filling a forming space between the upper and lower molds with molten material through the upper mold immediately after stopping heating and closing the upper and lower molds and the core;
• cooling the core and a molded product by injecting compressed air to the core and the molded product after allowing the upper and lower molds to be opened away from the core at predetermined distances;
• and
• ejecting the molded product from the upper and lower molds after allowing the upper and lower molds and the core to be completely opened.

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

• opening upper and lower molds and first and second cores of the mold, and supplying gaseous fuel;
• injecting and igniting the gaseous fuel from the upper and lower molds after allowing the upper and lower molds to come close to each other at a predetermined distance;
• heating the core for a predetermined time period;
• filling a forming space between the upper and lower molds with molten material through the upper mold, immediately after stopping heating and closing the upper and lower molds and the core;
• cooling the core and a molded product by injecting compressed air to the core and the molded product after allowing the upper and lower molds to be opened away from the core at predetermined distances;
• and
• ejecting the molded product from the upper and lower molds after allowing the upper and lower molds and the core to be completely opened.

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

• momentarily heating upper and lower molds by an induction 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;
• 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;
• an injection molding control for controlling the upper mold and the lower mold;
• an air and gaseous fuel mixture and supply unit for supplying compressed air and gaseous fuel simultaneously or selectively;
• 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;
• an injection molding control for controlling the upper and lower molds;
• a compressed air supply line for supplying compressed air;
• one or more cores disposed between the upper and lower molds;
• a voltage generator for generating voltage of a predetermined level;
• induction heaters for heating the cores using current applied from the voltage generator, said induction heaters being mounted on the inner portion of the upper mold and the upper portion of the lower mold;
• a controller for controlling the compressed air supply line and the voltage generator;
• an interface for interfacing the injection molding control and the controller;
• and
• a control panel for visually displaying the control, condition and operation of the components of the system.