Hydraulic control system of blow molding machine
A hydraulic control system and blow molding machine technology, applied in the field of hollow blow molding machines, can solve the problems of large power loss, lower production costs, disadvantages, etc., and achieve the effect of reducing power loss and cost
Inactive Publication Date: 2012-07-18
SICHUAN ZIYANG YAZHIJIANG PLASTICS IND
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Problems solved by technology
The system targets figure 1 The system described has improved somewhat, but several actuators supplied by the large pump 2.1 still appear figure 1 The unfavorable conditions existing in the system still have the problem of large power loss, and the energy-saving effect is not obvious enough; moreover, in order to meet the speed of some actuators, the displacement of the large pump 2.1 must be selected very large, which is not conducive to reducing production. cost
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[0020] The core of the present invention is to set a large pump and a small pump in the hydraulic control circuit, wherein the small pump supplies oil independently when the system performs high-pressure and small-flow actions, and the large pump and the small pump jointly supply oil when the system performs low-pressure and large-flow actions. Oil.
[0021] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0022] see image 3 , is a schematic diagram of the hydraulic control system of the large and small pump hollow blow molding machine improved by the present invention. The system is equipped with a group of hydraulic actuators, including mold opening and closing cylinder 11, mold moving cylinder 12, blowing cylinder 13, mold lifting cylinder 14, platform lifting motor 15, e...
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The invention discloses a hydraulic control system of a blow molding machine, comprising a hydraulic execution element group, wherein each hydraulic element in the hydraulic execution element group is independently controlled by own electromagnetic reversing valve, a big pump and a small pump are arranged on a hydraulic circuit; the oil inlet of the big pump is connected to an oil tank after being connected in parallel with the oil inlet of the small pump; and the oil outlet of the big pump is connected in parallel with the oil outlet of the small pump via a one-way valve, and then connected to the corresponding oil inlet of each hydraulic execution element in the hydraulic execution element group, so that the system is supplied with oil by the small pump while executing a high pressure small-flow action, and supplied with oil by both of the big pump and the small pump while executing a low pressure large-flow action. According to the hydraulic control system of the blow molding machine, the model numbers of the motor and the oil pump can be reduced, thus cost is favorably lowered and purposes of energy saving and consumption reduction are realized.
Description
technical field [0001] The invention relates to a hollow blow molding machine, in particular to a hydraulic control system for a hollow blow molding machine. Background technique [0002] The hydraulic system of the hollow blow molding machine mostly uses a single-pump hydraulic circuit, and a few use a large and small double-pump hydraulic circuit, but the control methods are different. The following is a brief description: [0003] see figure 1 , is the schematic diagram of the single-pump hydraulic system commonly used in existing small and medium-sized hollow blow molding machines. The pressure of all actuators of the system (including mold opening and closing cylinder 11, mold moving cylinder 12, blowing cylinder 13, mold lifting cylinder 14 and platform lifting motor 15, etc.) The proportional signal output by the programmable controller is used to control the pressure) 5 to adjust. According to the action characteristics of the hollow blow molding machine, some act...
Claims
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IPC IPC(8): B29C49/78
Inventor 马健杨智勇周术兵刘军王晓军
Owner SICHUAN ZIYANG YAZHIJIANG PLASTICS IND