Shanghai WORLD Press Machine Machinery Equipment Co., Ltd. is a manufacturer specializing in the design, manufacture, sales and maintenance of various standard and non-standard hydraulic machinery and hydraulic machinery, CNC machinery and automatic machinery. The main products of WORLD Press Machine machinery: presses, single-column hydraulic press
es, four-column hydraulic presses, slide-type hydraulic presses, multi-station hydraulic presses, etc., which are widely used in motor rotor press-fitting, bearing press-fitting, hardware accessories press-fitting, copper parts, zinc alloys, Edge punching and shaping of aluminum alloy and other metal die castings, PVC/PET/PC die-cutting and other processes.
After the cylinder of the four-column hydraulic press
is installed, there will definitely be air left in the system. Part of this air can be taken out by the oil, but it is difficult to be completely taken out, and it will remain in the cylinder.
Since the compressibility of air is greater than that of hydraulic oil, the piston of the oil cylinder will vibrate during the operation of the oil cylinder. Therefore, in addition to setting the sealing device to prevent the outside air from entering, it is also necessary to set the abandonment device. The air remaining inside is exhausted to make the cylinder work more stable. The installation position of the exhaust device of the four-column hydraulic press is generally at the highest part of the two chambers of the oil cylinder, and the exhaust device has two types: integral type and combined type.
The valve body and the valve needle of the integral exhaust device of the four-column hydraulic press are integrated. Generally, the cylinder head is used for connection. It relies on the conical surface of the head to play a sealing role. The air will be pressed out of the gap of the tapered surface. Then it is discharged to the outside of the cylinder through the inclined hole. The construction of the integral exhaust device is simple, the use is more convenient, and the use in the four-column hydraulic press is more common than the combined type.
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