Automatic purging machine electric control system for static pressure modeling line exhaust dead head

Abstract

The invention relates to an automatic purging machine electric control system for a static pressure modeling line exhaust dead head. An automatic purging machine comprises a base plate assembly, a lifting assembly and an air blowing assembly. The base plate assembly comprises a rack and a grid net rack. The lifting assembly is arranged on the rack of the base plate assembly. An oil cylinder is controlled through hydraulic pressure to drive the air blowing assembly to ascend and descend. The air blowing assembly comprises an air blowing bale, an air blowing pipe and a valve. The air blowing bale is fixed below an oil cylinder connecting seat. The electric control system achieves automatic control through a PLC and is mainly composed of electromagnetic induction type proximity switches, electromagnetic valves, the PLC, a manual operation interface and an electrical line. The electric control system receives signals of all the proximity switches through the PLC and controls opening and closing of all the electromagnetic valves so that the lifting assembly or the air blowing assembly can conduct corresponding actions to achieve automatic purging on a sand box exhaust dead head. By means of the automatic purging machine electric control system for the static pressure modeling line exhaust dead head, intelligence and automation of the purging technology can be achieved, the cost is reduced, the efficiency is improved, and the sand mold yield is increased.

Description

technical field [0001] The invention relates to the field of static pressure molding, in particular to an electric control system for an automatic purging machine for an exhaust riser of a static pressure molding line. Background technique [0002] Foundry company's wet sand static pressure line, single main engine molding, operating cycle is 55 boxes / hour, the main products are: Ricardo four-cylinder block, 4NC four-cylinder block, 4M5L four-cylinder block, Shangchai four-cylinder block and various cylinder heads Castings etc. Because the static pressure line adopts compaction molding, the air permeability of the whole sand mold is not good, so many exhaust risers are designed in the process to exhaust, and at the same time, the casting is fed after cooling down. Due to the large number of exhaust risers in castings, each mold has a maximum of 40 exhaust risers. Usually, two servo air hole drilling machines are used to drill holes on the sand mold and drill through the exh...

AI Technical Summary

Problems solved by technology

However, there are the following problems in the manual purging of the pouring riser: 1. The manual blowing is to blow the air from the cavity to the exhaust hole before the upper box is turned over. There is a hole diameter difference between the air pin and the drill hole, and there is floating sand here, which cannot be discharged by using this air blowing method; 2. Since the lower core section is arranged continuously with the upper box and the lower box, artificial air blowing can easily cause floating sand to splash , falling into the adjacent lower box; 3. Due to the large number of air holes (about 40), coupled with the fast operation rhythm, it often results in missing blowing. unstable

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