Efficient child-mother cylinder and hydraulic control system thereof

Abstract

The invention relates to an efficient child-mother cylinder and a hydraulic control system thereof. The efficient child-mother cylinder comprises a mother cylinder body, a child cylinder body and a piston rod. At least one mother cylinder mold closing oil inlet and at least one differential oil inlet are formed in the top of the mother cylinder body, and a mold opening oil inlet is formed in the bottom of the mother cylinder body. The child cylinder body is slidably arranged in the mother cylinder body, and the lower end of the child cylinder body extends out of the cylinder body, so that a mold closing cavity and a mold opening cavity are formed in the mother cylinder body. A mold closing channel extending into the child cylinder body is arranged at the upper end of the child cylinder body. The upper end of the piston rod is fixed to the mother cylinder body, and the lower end extends into the mold closing channel. The piston rod is of a hollow structure, and a child cylinder mold closing oil inlet is formed in the upper end of the piston rod. According to the efficient child-mother cylinder and the hydraulic control system thereof, the mother cylinder mold closing oil inlets are formed in the mother cylinder body so that a large amount of oil can be conveniently fed into the mold closing cavity, and meanwhile, hydraulic oil in the mold opening cavity can be guided into the mold closing cavity through the differential oil inlets, so that the mold closing speed is high, the working efficiency is improved, the output force is large, and the requirement of a large-load occasion can be met.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a high-efficiency master cylinder and its hydraulic control system. Background technique [0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When it is used to realize reciprocating motion, the deceleration device can be eliminated and there is no transmission gap. , The movement is smooth, so it is widely used in various mechanical hydraulic systems. [0003] In the prior art, such as the application number 201720278974.5 discloses an injection cylinder, an injection device and an injection molding machine, wherein the injection cylinder includes a cylinder body, a cylinder head and an injection piston, and the injection piston can reciprocate in the cylinder , so that the volume of the injection cavity joi...

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Problems solved by technology

[0003] In the prior art, such as the application number 201720278974.5 discloses an injection cylinder, an injection device and an injection molding machine, wherein the injection cylinder includes a cylinder body, a cylinder head and an injection piston, and the injection piston can reciprocate in the cylinder , so that the volume of the injection cavity jointly defined by the injection piston, the cylinder head and the cylinder body changes; the injection cylinder is also provided with a differential piston, wherein the injection piston is provided with an inner chamber, and the differential piston is arranged at The interior of the cylinder, and one end of the differential piston is inserted into the inner chamber, the differential piston is provided with a communication channel, the communication channel is in fluid communication with the inner chamber, thereby forming a differential The differential chamber is in fluid communication with the injection chamber via a pipeline; the prior art adopts a differential connection, although the volume and weight of the piston rod are reduced, and the manufacturing cost of the piston rod is reduced, but only through the communication channel Oil intake not only slows the mold closing speed, greatly reduces the work efficiency, but also the output force is small, which cannot meet the occasion of large load

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