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[CN 201720967288.9] Four-column double-acting hydraulic press


[CN 201720967288.9] Four-column double-acting hydraulic press Title: Four-column double-acting hydraulic press Application Number: CN 201720967288.9 Applicant: Ningbo Chenli Hardware Technology Co., Ltd. Application Date: 2017-8-4 Patent Type: Utility Model The utility model discloses a four-column double-acting hydraulic press, which solves the problem that the press plate of the existing four-column hydraulic press will slide up and down during operation, however, if the hand or head extends into the pressing plate or the working part of the mold, it will be injured. The main points of the technical scheme are as follows: it includes a temperature detection device, a voltage comparison device preset with a temperature reference signal and coupled to the temperature detection device to receive the temperature detection signal and compare the temperature reference signal and the temperature detection signal and output a voltage comparison signal, a first control device coupled to the voltage comparison device to receive the voltage comparison signal and output a first control signal, provided on the place and controlled by the first control device to detect whether a human body is nearby and open and close the human body detection device of the four-column double-acting hydraulic press; the four-column double-acting hydraulic press of the utility model can effectively avoid safety accidents caused by users extending their hands or heads when the four-column hydraulic press is working.