Curing gas blowing device and method for manufacturing core by using cold core box die

Abstract

The invention discloses a curing gas blowing device for manufacturing a core by using a cold core box die, which is used for curing a sand core in a die cavity. The device comprises a gas blowing plate arranged on the die, and a cavity is arranged in the center of the lower part of the gas blowing plate and between the gas blowing plate and the die respectively; a curing gas inlet is formed at the edge of the gas blowing plate; the upper part of the gas blowing plate is provided with an upper core jacking device, the upper core jacking device comprises an upper core jacking rod, the upper core jacking rod passes through a corresponding through hole of the gas blowing plate, and the through hole of the gas blowing plate is adapted with a sand shooting hole of the die on position and diameter; and the curing gas inlet, the cavities, the sand shooting hole of the die and the die cavity form a complete curing gas flow passage. The invention also discloses a gas blowing method using the gas blowing device. The gas blowing device has compact structure and high curing gas utilization rate, and reduces the environmental pollution; and the gas blowing method ensures better curing effect.

Description

technical field [0001] The invention relates to the field of sand casting, in particular to a cold box mold core-making curing gas blowing device and method. Background technique [0002] The cold box mold (hereinafter referred to as the mold) belongs to the casting mold and is used to prepare the casting sand core. The working principle of the mold is: the mold is installed on the core shooting machine and works in coordination with the core shooting machine. There is a cavity inside the mold, and the cavity is shot through the sand. The hole communicates with the outside of the mold. The sand injection nozzle equipped on the mold injects the loose casting sand mixed with the curing agent into the mold cavity through the sand injection hole under the action of compressed air. After the sand injection, the upper core rod will inject the sand The irregular sand pile left by the hole is flattened (to make the molding sand match the size of the cavity), and then a solidificatio...

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Problems solved by technology

[0005] Although the air blowing device of the above-mentioned prior art can meet the work needs, there are certain shortcomings, which are mainly manifested in: 1. The box volume of the air blowing box is relatively large, the gas pressure boost of the solidified gas in the box is slow, and the flow rate of the solidified gas is slow , resulting in a correspondingly slower speed of curing gas entering the cavity, long curing time, long core-making cycle, and low sand core output per unit time; 2. The upper core board is installed in the blowing box, and the structure of the blowing box is complex ; 3. Excessive blowing box volume also causes a large amount of residual solidified gas, increases the cost of solidified gas generation and tail gas treatment, and causes environmental pollution to a certain extent

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