CN109624254B - High-response injection molding machine servo pump cylinder injection system - Google Patents
High-response injection molding machine servo pump cylinder injection system Download PDFInfo
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- CN109624254B CN109624254B CN201910023086.2A CN201910023086A CN109624254B CN 109624254 B CN109624254 B CN 109624254B CN 201910023086 A CN201910023086 A CN 201910023086A CN 109624254 B CN109624254 B CN 109624254B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/82—Hydraulic or pneumatic circuits
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a high-response injection system of a servo pump cylinder of an injection molding machine, which comprises an oil tank, a motor oil pump assembly, a control valve plate, an injection oil cylinder and the like. The motor oil pump assembly consists of a servo motor, a coupler, a servo pump, a filter and a cooler; the control valve plate is composed of a two-position four-way electromagnetic directional valve, a three-position four-way electromagnetic directional valve, a one-way valve, an overflow valve, a pressure gauge, a proportional valve, a two-way quantitative servo pump and the like. The servo motor is connected with the servo pump through a coupler, and high-pressure hydraulic oil enters an oil inlet of the servo pump from an oil tank through a filter; an oil outlet of the servo pump is connected with a P2 port of the control valve plate, a T port of the control valve plate is connected with an oil tank through a cooler, and an S port of the control valve plate is connected with the oil tank through a filter; a pressure gauge is arranged at the port P1 of the control valve plate; the port B2 of the control valve plate is connected with the left cavity of the injection oil cylinder, and the port A1 of the control valve plate is connected with the right cavity of the injection oil cylinder; the oil inlet and outlet of the oil motor are respectively connected with the ports B1 and T1 of the control valve plate.
Description
Technical Field
The invention belongs to the technical field of injection molding, and particularly relates to a system for driving a hydraulic cylinder by a servo pump of a high-response injection molding machine.
Background
At present, an injection molding machine is divided into a hydraulic injection molding machine and a full-electric injection molding machine from a power system, the hydraulic injection molding machine is most widely applied by a servo pump technology, the principle is that a servo motor drags an oil pump to output pressure oil according to instructions and load conditions of a controller, the pressure oil is directly conveyed to a hydraulic cylinder or a control element through a longer hydraulic pipeline and then reaches the hydraulic cylinder to realize each action of the injection molding machine, along-stroke pressure loss and additional pipeline filling time can be caused due to the fact that the pressure oil passes through the longer hydraulic pipeline, the hydraulic injection molding machine has the defect of slow action response and incapability of meeting the injection molding working condition of high speed and high response, the other full-electric injection molding machine has the principle that the servo motor directly drives each action of the injection molding machine through a ball screw, and has the defects of short service life, fast action response, high precision and short, The equipment is expensive, more than 3 times of the price of the common hydraulic injection molding machine, and the use requirement and the later maintenance cost of the equipment are very high.
Disclosure of Invention
The injection system aims to solve the problems that the existing injection system of the hydraulic injection molding machine is slow in response speed, long in pipeline, and has on-way pressure loss and the like in actual industrial production.
In order to achieve the purpose, the invention provides a high-response injection system of a servo pump cylinder of an injection molding machine, which comprises an oil tank, a motor oil pump assembly, a control valve plate, an injection oil cylinder and the like. The motor oil pump assembly consists of a servo motor, a coupler, a servo pump, a filter and a cooler; the control valve plate is composed of a two-position four-way electromagnetic directional valve, a three-position four-way electromagnetic directional valve, a one-way valve, an overflow valve, a pressure gauge, a proportional valve, a two-way quantitative servo pump and the like. The servo motor is connected with the servo pump through a coupler, and high-pressure hydraulic oil enters an oil inlet of the servo pump from an oil tank through a filter; an oil outlet of the servo pump is connected with a P2 port of the control valve plate, a T port of the control valve plate is connected with an oil tank through a cooler, and an S port of the control valve plate is connected with the oil tank through a filter; a pressure gauge is arranged at the port P1 of the control valve plate; the port B2 of the control valve plate is connected with the left cavity of the injection oil cylinder, and the port A1 of the control valve plate is connected with the right cavity of the injection oil cylinder; the oil inlet and outlet of the oil motor are respectively connected with the ports B1 and T1 of the control valve plate.
The injection system of the servo pump cylinder of the high-response injection molding machine is characterized in that the oil inlet is provided with a filter;
the servo pump cylinder injection system of the high-response injection molding machine is characterized in that the filter can be a self-sealing magnetic oil absorption filter or a common oil absorption filter;
the injection system of the servo pump cylinder of the high-response injection molding machine is characterized in that a cooler is arranged between the oil return path and the oil tank;
the servo pump cylinder injection system of the high-response injection molding machine is characterized in that the cooling mode of the cooler can be air cooling, water cooling or any cooling mode suitable for the system;
the injection system of the servo pump cylinder of the high-response injection molding machine is characterized in that the servo oil pump assembly is arranged on the hydraulic cylinder through the control valve plate;
the high-response injection system of the servo pump cylinder of the injection molding machine is characterized in that a pressurization system can be arranged in the oil tank to prevent the suck-back phenomenon.
The bidirectional quantitative servo pump has the advantages that the device is simple in structure and convenient to operate, the bidirectional quantitative servo pump is directly arranged on the injection oil cylinder through the control valve plate, pressure loss and response lag caused by a long hydraulic pipeline of an original hydraulic injection molding machine are avoided, the defect of low response speed of the injection molding machine is creatively overcome, the response speed of an injection molding system is improved, and the on-way pressure loss is reduced.
Drawings
FIG. 1 is a schematic diagram of a servo pump cylinder injection system of a high-response injection molding machine according to the present invention.
In the figure: 1. the injection oil cylinder 2, the oil motor 3, the check valve 4, the three-position four-way electromagnetic directional valve 5, the two-position four-way electromagnetic directional valve 6, the proportional valve 7, the pressure gauge 8, the control valve plate 9, the overflow valve 10, the pressure sensor 11, the servo motor 12, the coupler 13, the bidirectional quantitative servo pump 14, the servo pump 15, the cooler 16, the filter 17 and the oil tank.
Detailed Description
The following will further explain the embodiment of the servo pump cylinder injection system of the high-response injection molding machine provided by the invention with reference to the accompanying drawings, and the injection system mainly comprises an oil tank 17, a motor oil pump assembly, a control valve plate 8, an oil cylinder 1 and the like. The motor oil pump assembly consists of a servo motor 11, a coupler 12, a servo pump 14 and a filter 16; the control valve plate 8 is composed of a one-way valve 3, a three-position four-way electromagnetic directional valve 4, a two-position four-way electromagnetic directional valve 5, a proportional valve 6, a pressure gauge 7, an overflow valve 9, a two-way quantitative servo pump 13 and the like. The servo motor 11 is connected with a servo pump 14 through a coupler 12, and high-pressure hydraulic oil enters an oil inlet of the servo pump 14 from an oil tank 17 through a filter 16; an oil outlet of the servo pump 14 is connected with a port P2 of the control valve plate 8, a port T of the control valve plate 8 is connected with an oil tank 17 through a cooler 15, and a port S of the control valve plate 8 is connected with the oil tank 17 through a filter 16; a pressure gauge 7 is arranged at a P1 port of the control valve plate 8; the port B2 of the control valve plate 8 is connected with the left cavity of the injection oil cylinder 1, and the port A1 of the control valve plate 8 is connected with the right cavity of the injection oil cylinder 1; the oil inlet and outlet ports of the oil motor 2 are connected to ports B1 and T1 of the control valve plate 8, respectively.
The P port of the two-position four-way electromagnetic directional valve V1 is connected with the P port of the two-position four-way electromagnetic directional valve V2; the T port of the two-position four-way electromagnetic directional valve V1 is connected with the T port of the control valve plate 8; the port B of the two-position four-way electromagnetic directional valve V1 is connected with the port B2 of the control valve plate 8; an A port of the two-position four-way electromagnetic directional valve V2 is connected with a P port of the three-position four-way electromagnetic directional valve V4 through a one-way valve V3, and an oil inlet of the bidirectional quantitative servo pump 13 is connected with an oil tank 17 through a filter 16; an oil outlet of the bidirectional quantitative servo pump 13 is connected with a P port of a three-position four-way electromagnetic reversing valve V4, and the oil outlet of the bidirectional quantitative servo pump 13 is connected with a one-way valve V8 through an overflow valve V7 and returns to the oil tank 17 through a T port of the control valve plate 8; the port A of the three-position four-way electromagnetic directional valve V4 is connected with the right cavity of the injection hydraulic cylinder 1 through the port A1 of the control valve plate 7; the port B of the three-position four-way electromagnetic reversing valve V4 is connected with an oil inlet of the oil motor 2 through a one-way valve V5; the T port of the three-position four-way electromagnetic reversing valve V4 is respectively connected with the two-position four-way electromagnetic reversing valve V6 and the proportional valve 6, and is connected with the oil outlet of the oil motor 2 and returns to the oil tank 17 through the T port of the control valve plate 5 and the cooler 15 by the one-way valve V8.
The working principle of the invention is as follows: when the three-position four-way electromagnetic reversing valve V4 is in the middle position and the electromagnets YA1 and YA2 are not electrified, the pressure of the servo pump 14 and the bidirectional quantitative servo pump 13 is respectively relieved, and high-pressure oil returns to the oil tank 17 through the overflow valve V7, the one-way valve V8 and the cooler 15.
Slow speed injection: when the electromagnet YA1 is not electrified, and YA2 and YA4 are electrified, high-pressure oil output by the servo pump 13 enters the right cavity of the injection oil cylinder through the three-position four-way electromagnetic reversing valve V4, oil in the left cavity returns to the oil tank 17 through the right position of the two-position four-way electromagnetic reversing valve V1 and the cooler 15, and the piston of the injection oil cylinder drives the screw rod to realize slow injection.
And (3) quick injection: when the injection oil cylinder touches a low-speed end travel switch, YA1 and YA2 are not powered, YA4 is powered, high-pressure oil output by the servo pump 13 is merged with high-pressure oil output by the bidirectional quantitative servo pump 12 through the two-position four-way electromagnetic reversing valve V2 and the one-way valve V3, the high-pressure oil enters the right cavity of the injection oil cylinder through the three-position four-way electromagnetic reversing valve V4, oil in the left cavity returns to the oil tank 17 through the right position of the two-position four-way electromagnetic reversing valve V1 and the cooler 15, and the piston of the injection oil cylinder drives the screw rod to realize rapid injection.
Storing materials: when the electromagnets YA1 and YA2 are not powered on and YA3 is powered on, high-pressure oil output by the bidirectional quantitative servo pump 13 enters the oil motor 2 through the three-position four-way electromagnetic reversing valve V4 and the one-way valve V5. At this time, the melt pressure at the head of the screw rod forces the injection cylinder 1 to retreat, and the hydraulic oil in the right cavity of the injection cylinder 1 returns to the oil tank 17 through the three-position four-way valve V4, the proportional valve 6, the one-way valve V8 and the cooler 15. The storage material back pressure can be regulated and controlled by the proportional valve 6.
Loosening: when the piston of the injection oil cylinder returns to touch a travel switch, the electromagnets YA1, YA3 and YA5 are electrified, the YA2 is not electrified, high-pressure oil output by the servo pump 14 enters the left cavity of the injection oil cylinder 1 through the two-position four-way electromagnetic directional valve V1, and hydraulic oil in the right cavity of the injection oil cylinder 1 returns to the oil tank 17 through the three-position four-way electromagnetic directional valve V4, the two-position four-way electromagnetic valve V6, the one-way valve V8 and the cooler 15.
The above description is provided for the specific apparatus and process conditions of the present invention, and is illustrated with reference to the drawings. The present invention is not limited to the specific apparatus and process described above, and any modification or replacement of the related apparatus or any local adjustment of the related process based on the above description is within the spirit and scope of the present invention.
Claims (5)
1. The utility model provides a high response injection molding machine servo pump jar injection system which characterized in that: the injection valve comprises an oil tank, a motor oil pump assembly, a control valve plate and an injection oil cylinder, wherein the motor oil pump assembly consists of a servo motor, a coupler, a servo pump, a filter and a cooler; the control valve plate consists of a two-position four-way electromagnetic reversing valve, a three-position four-way electromagnetic reversing valve, a one-way valve, an overflow valve, a pressure gauge, a proportional valve and a bidirectional quantitative servo pump; the servo motor is connected with the servo pump through a coupler, and high-pressure hydraulic oil enters an oil inlet of the servo pump from an oil tank through a filter; the oil outlet of the servo pump is connected with a P2 port of the control valve plate, a T port of the control valve plate is connected with an oil tank through a cooler, and an S port of the control valve plate is connected with the oil tank through a filter; a pressure gauge is arranged at the port P1 of the control valve plate; the port B2 of the control valve plate is connected with the left cavity of the injection oil cylinder, and the port A1 of the control valve plate is connected with the right cavity of the injection oil cylinder; the oil inlet and outlet of the oil motor are respectively connected with the ports B1 and T1 of the control valve plate; the servo oil pump assembly is arranged on the hydraulic cylinder through the control valve plate; the P port of the first two-position four-way electromagnetic reversing valve is connected with the P port of the second two-position four-way electromagnetic reversing valve; the T port of the first two-position four-way electromagnetic directional valve is connected with the T port of the control valve plate; the port B of the first two-position four-way electromagnetic directional valve is connected with the port B2 of the control valve plate; an A port of the second two-position four-way electromagnetic directional valve is connected with a P port of the first three-position four-way electromagnetic directional valve through a one-way valve, and an oil inlet of the bidirectional quantitative servo pump is connected with an oil tank through a filter; an oil outlet of the bidirectional quantitative servo pump is connected with a P port of the first three-position four-way electromagnetic reversing valve, and meanwhile, the oil outlet of the bidirectional quantitative servo pump is connected with the one-way valve through an overflow valve and returns to the oil tank through a T port of the control valve plate; the port A of the first three-position four-way electromagnetic directional valve is connected with the right cavity of the injection hydraulic cylinder through the port A1 of the control valve plate; the port B of the first three-position four-way electromagnetic directional valve is connected with an oil inlet of the oil motor through a one-way valve; the T port of the first three-position four-way electromagnetic reversing valve is respectively connected with the third two-position four-way electromagnetic reversing valve and the proportional valve, and is connected with the oil outlet of the oil motor and returns to the oil tank through the T port of the control valve plate and the cooler by the one-way valve; and a pressurization system is arranged in the oil tank.
2. The high response injection molding machine servo pump cylinder injection system of claim 1, wherein said oil inlet is provided with a filter.
3. The injection system of the servo pump cylinder of the injection molding machine as claimed in claim 1, wherein the filter is a self-sealing magnetic oil absorption filter or a common oil absorption filter.
4. The injection system of the servo pump cylinder of the injection molding machine according to claim 1, wherein a cooler is provided between the oil return path and the oil tank.
5. The injection system of the servo pump cylinder of the injection molding machine as claimed in claim 1, wherein the cooling means of the cooler is air cooling or water cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910023086.2A CN109624254B (en) | 2019-01-10 | 2019-01-10 | High-response injection molding machine servo pump cylinder injection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910023086.2A CN109624254B (en) | 2019-01-10 | 2019-01-10 | High-response injection molding machine servo pump cylinder injection system |
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| CN109624254A CN109624254A (en) | 2019-04-16 |
| CN109624254B true CN109624254B (en) | 2021-06-29 |
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| CN201910023086.2A Active CN109624254B (en) | 2019-01-10 | 2019-01-10 | High-response injection molding machine servo pump cylinder injection system |
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| CN111204019A (en) * | 2020-02-27 | 2020-05-29 | 丰铁机械(苏州)有限公司 | Storage balance oil way of vertical injection molding machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6289259B1 (en) * | 1998-10-16 | 2001-09-11 | Husky Injection Molding Systems Ltd. | Intelligent hydraulic manifold used in an injection molding machine |
| DE102012023902B3 (en) * | 2012-12-07 | 2014-03-20 | Arburg Gmbh + Co. Kg | Method for operating a hydraulic device with pump and servomotor and associated hydraulic device |
| CN106194867A (en) * | 2016-08-31 | 2016-12-07 | 湖南华强电气股份有限公司 | A kind of hydraulic system and mould |
| CN206186303U (en) * | 2016-11-23 | 2017-05-24 | 天津颐和中威精密机器有限公司 | Hydraulic circuit of injection molding machine |
| CN108386398A (en) * | 2018-05-09 | 2018-08-10 | 登派液压技术（上海）有限公司 | A kind of compound hydraulic cylinder position control pump control hydraulic system |
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Inventor after: Li Binbin Inventor after: Jin Liang Inventor after: Zhang Taotao Inventor after: Wei Jianhong Inventor after: Chu Nengkui Inventor after: Yao Lixian Inventor after: Lu Chenfeng Inventor after: Zhou Hongwei Inventor after: Sun Jun Inventor after: Rao Zhong Inventor before: Li Binbin Inventor before: Lu Yunjie Inventor before: Zhang Taotao Inventor before: Wei Jianhong Inventor before: Zhang Jinrong Inventor before: Yao Lixian Inventor before: Lu Chenfeng Inventor before: Zhou Hongwei Inventor before: Sun Jun Inventor before: Rao Zhong |
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