Closed oil supply system of sectional material extruding machine

Abstract

The invention discloses a closed oil supply system of a sectional material extruding machine, belongs to the field of sectional material molding equipment, and relates to an oil supply system of an extruding machine. The closed oil supply system comprises an oil cylinder and an oil storage tank, wherein the oil cylinder is provided with a prefill valve, the oil storage tank is divided into an oil return oil tank and a pressurization oil cylinder which are respectively sealed, and the oil return oil tank is connected with the oil cylinder by virtue of a backflow oil line connected to the oil cylinder; the oil return oil tank is connected with the pressurization oil cylinder by virtue of an oil supply pipeline, a circular oil line between the oil cylinder and the pressurization oil cylinder is formed by the backflow oil line, the oil return oil tank and the oil supply pipeline, and the pressurization oil cylinder is provided with a piston; by virtue of the reciprocating motion of piston, the oil in the pressurization oil cylinder is extruded in to the oil cylinder or the oil in the oil cylinder flows back into the pressurization oil cylinder by virtue of the circulation oil line, so that the sealed oil supply system of the extruding machine is formed. The oil supply system is in a sealed state, dust sundries and the like are prevented from being mixed into the oil supply system, the cleanness of hydraulic oil is kept, and the working life of the hydraulic oil is prolonged.

Description

technical field [0001] The invention belongs to the field of profile forming equipment, and relates to an extruder oil supply system. Background technique [0002] The traditional copper-aluminum profile extrusion machine adopts an upper open oil tank. When the plunger cylinder moves forward and backward without load, it is pushed by the auxiliary cylinder, and the hydraulic oil enters and returns through the filling valve. When the oil is fed, it is propelled by gravity, so the hydraulic oil is in contact with the atmosphere for a long time. Due to the large flow of hydraulic oil every time it works, it is easy to mix with air and dust, and there are many oil valves and oil pumps on the oil circuit of the extruder, so it is also easy to suck air and mix gas, so this open type The oil tank seriously affects the use effect of hydraulic oil, and reduces the service life of hydraulic oil, which is not conducive to energy saving, environmental protection and cost saving. Con...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a closed oil supply system that solves the defects of the existing profile extrusion machine that the oil circuit is in contact with the atmosphere and affects the service life of the hydraulic oil.

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