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[CN 201720526516.9] Closed Frame Hydraulic Press Title: Closed Frame Hydraulic Press Application Number: CN 201720526516.9 Applicant: Horsepower; Cao Zhi; Zhu Lei Application Date: 2017-5-8 Patent Type: The utility model relates to a closed frame hydraulic press The purpose of the utility model is to solve the problem that the traditional hydraulic press cannot meet the requirement of greater pressure due to the use of an oil cylinder, which generates small pressure. The purpose of the utility model is to achieve this: the cylinder bottom is fixedly connected with the closed frame, the piston is slidingly connected with the closed frame, the lower piston is slidingly connected with the closed frame, the inner piston is slidingly connected with the lower piston, and the cylinder block is fixedly connected with the closed frame and slidingly connected with the lower piston. The inner piston is fixedly connected with the sliding block. The closed frame has an upper exhaust port, the lower piston has a lower exhaust port, the cylinder plug has a cylinder plug oil inlet, and the inner cylinder plug has an inner cylinder plug oil inlet. The utility model installs the lower piston under the piston, and the two pistons work at the same time during the working process, so the total pressure is doubled compared with the traditional hydraulic press with only one piston.
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