Patent ID: 6102104
Filing Date: 2000-08-15
Classification: F28D,F28F,Y10S

Abstract:
A die-cushion oil pressure locking device comprising:a locking device body further comprises a locking cylinder including a locking cylinder body which can be prevented the wrinkling when the molded product is processed, the locking cylinder body being formed such that the locking cylinder body stores oil therein and drain it while the locking cylinder body couples with a die-cushion device which is operated by a compressed air and an outlet tube attached to the locking cylinder body, having an opening thereof; and an operating cylinder attached to an outer wall of the locking cylinder, having an openable closure valve which can open and close the opening of the outlet tube so as to discharge an oil from the locking cylinder and pressurize the oil into the locking cylinder at a pressurized condition;a cooling oil cooler device made of stainless steel, one end portion thereof being connected the outlet tube, another end portion thereof being connected the locking cylinder body, said cooling oil cooler device being capable of regulating the fluid flow of oil discharged from the locking cylinder body when said openable closure valve is opened, allowed the temperature of the regulated oil to fall down by cooling water, and flowed cooled-oil in an axial direction in a condition that the resistance decreases to flow;the oil cooler device body which further including an oil tube passes through the discharged oil when the opening of the outlet tube is opened by the openable closure valve and extending horizontally; an oil flow regulator attached to said oil tube, regulating the oil flow; a plurality of oil cooler tubes that are made of stainless steel, the oil cooler tubes being connected to said oil tube horizontally and having an inlet and outlet thereof in a straight direction such that said oil cooler tubes can be flowed the oil regulated by said oil flow regulator at an intermittent drop manner in an axial direction in such a condition that the resistance decreases to flow; and an oil outlet tube connected said plurality of oil cooler tubes, one end thereof being connected to the oil cooler tubes horizontally, other end thereof being connected to said oil cabin of said locking cylinder; andthe cooling device which further including a cooling device body which is formed such that the cooling device body is located at an outer circumferential portion of said plurality of oil cooler tubes, so as to pass a cooling water through spaces among said oil cooler tubes into said cooling device body; and a cooling water inlet tube and a cooling water outlet tube which are connected to said cooling device body and a cooling tower connected to said cooling water inlet tube and cooling water outlet tubes such that it is allowed the cooling water to circulate.