The pneumatic system of core shooting machine is composed of basic circuits such as fast exhaust circuits, sequence control circuits, electromagnetic commutation circuit and voltage regulation circuits. Because of adopting electromagnetic chase-pneumatic control, the system has the advantages of high automation, interlocking action, perfect safety protection and simple system.
Brief introduction of the working principle of the pneumatic system of core shooting machine
The pneumatic system of core shooting machine runs through the entire workflow, including four parts: the table is raised and the core box is clamped, sand shot, the worktable is lowered, and sand is added.
A pneumatic system of core shooting machine part one: Table rise and core box clamping
The hollow core box is sent to the top of the lifting cylinder along with the worktable and presses the travel switch so that the electromagnet is energized, and the electromagnetic reversing valve is reversing.
The airflow through the electromagnetic directional valve is divided into three ways:
① The first way enters the lower cavity of the gate seal ring through the quick exhaust valve to improve the sealing performance of the seal ring;
② The second way enters the jacking cylinder through the quick exhaust valve, raises the worktable, presses the core box under the sand-blasting head, and presses the core box when the piston in the jacking cylinder rises to the apex;
③ When the air pressure in the pipeline rises to 0.5MPa, the one-way sequence valve opens, allowing the third airflow to enter the clamping cylinder to clamp the core box horizontally.
A pneumatic system of core shooting machine part two: Sandblasting
When the air pressure in the clamping cylinder is greater than 0.5MPa, the pressure relay is pressed, the electromagnet is energized, the electromagnetic reversing valve is reversed, the exhaust valve is closed, and the upper cavity of the annular film quick shot sand valve is exhausted.
At this time, the compressed air in the air storage bag will lift the film of the quicksand injection valve, so that the compressed air of the air storage bag quickly enters the sand shooting cylinder for sand shooting. The length of the shot time is controlled by the time relay.
After the sandblasting is completed, the electromagnet loses power, the electromagnetic reversing valve is reset, so that the quick sand-blasting valve is closed, and the exhaust valve is opened to eliminate the residual air in the sand-blasting cylinder.
Part three: Workbench down
After the sand-blasting cylinder is exhausted, the electromagnet loses power and the electromagnetic reversing valve is reset, so that the lifting cylinder is lowered by gravity and the clamping cylinder is returned to its original position at the same time, and the lower chamber of the gate seal ring is exhausted.
When the jacking cylinder is lowered to the lowest position, the core box that shoots the sand core is driven by the worktable trolley and is sent to the coring machine together with the worktable to complete the hardening and mold lifting process.
Part four: Add sand
When the worktable is lowered to the endpoint and the stroke switch is pressed, the electromagnet is energized, the electromagnetic directional valve is switched, and the gate cylinder moves to the left.
The sand gate is opened, and the sand hopper adds sand into the sand-blasting sand, and the time of sand addition is controlled by the time relay.
When the predetermined time is reached, the electromagnet is de-energized, the electromagnetic directional valve is reset, and the gate cylinder moves to the right to stop the sand addition.
Delin Intelligent Technology Co., Ltd. is a professional manufacturer with years of experience in the production of the automatic core shooting machine. We have a professional design and production team to produce a high-quality foundry core shooting machine.
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