CN102501401A - Molding pressure control system for hydraulic molding machine and control method thereof - Google Patents
Molding pressure control system for hydraulic molding machine and control method thereof Download PDFInfo
- Publication number
- CN102501401A CN102501401A CN2011103342882A CN201110334288A CN102501401A CN 102501401 A CN102501401 A CN 102501401A CN 2011103342882 A CN2011103342882 A CN 2011103342882A CN 201110334288 A CN201110334288 A CN 201110334288A CN 102501401 A CN102501401 A CN 102501401A
- Authority
- CN
- China
- Prior art keywords
- pressure
- valve
- electromagnetic switch
- oil
- constant output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
Provided are a molding pressure control system for a hydraulic molding machine and a control method thereof. The molding pressure control system for the hydraulic molding machine comprises a controller and a hydraulic system, wherein an outlet of a low-pressure variable-quantity constant output pump in the hydraulic system is connected with a safety valve I through a hydraulic pipeline, the safety valve I is connected with an oil inlet of a check valve I through a hydraulic oil way, one way of the oil outlet of the check valve I is connected with an accumulator, and the other way of the oil outlet of the check valve I is connected with an oil inlet of a check valve II. An outlet of a high-pressure variable-quantity constant output pump is connected with a safety valve II through a hydraulic pipeline, the safety valve II is connected with an oil inlet of a check electromagnetic switch valve through a hydraulic oil way, an oil outlet of the check electromagnetic switch valve is connected with an oil outlet of the check valve II, one way of the oil outlet of the check electromagnetic switch valve is connected with a pressing circuit, and the other way of the oil outlet of the check electromagnetic switch valve is connected with the accumulator through an electromagnetic switch control valve. The constant power variable quantity pump is used for directly pressurizing to molding pressure. The molding pressure control method is simple, high in repeated accuracy, quick in response, high in reliability and capable of obviously improving molding quality of raw bricks, simplifying hydraulic circuits and enabling the method to be simple and reliable.
Description
Technical field
The present invention relates to the large-tonnage hydraulic forming machine, particularly the briquetting pressure of wall body brick hydraulic forming machine control system and control method are used for accurately controlling wall body brick hydraulic forming machine green brick forming pressure.
Technical background
Going deep into along with what materials for wall was reformed in recent years; Environment-friendly energy-saving wall body brick particularly fly ash wall body brick has obtained using widely; Crucial former as the flyash brick making: hydraulic forming machine plays a decisive role in the control of green brick forming Quality Process.The important parameter of stipulating in the wall body brick GB: fluctuation range is bigger always for the appearance and size of wall body brick and the compression strength of wall body brick; The big main cause of its fluctuation has: it is big that cloth is uneven, briquetting pressure fluctuates up and down etc.; Prior art is improved not quite solving into brick pressure oscillation broad aspect always, brings no small adverse effect for applying of flyash.
In the hydraulic forming machine of present domestic use; Become the control of brick pressure to adopt time control act more: i.e. adobe low pressure molding and in the molded stage control with time length low pressure molding pressure with in molded pressure, in the molded mode that finishes to adopt the pressurized cylinder supercharging in the back accomplish high pressure and suppress.This control mode is owing to receive many factor affecting such as temperature, oil viscosity, fluid elastic modelling quantity, material elastic modelling quantity, cloth difference, low pressure and in to be pressed into the brick pressure oscillation bigger, repeatable accuracy is poor; In high pressure when compacting, is owing to adopt the pressurized cylinder supercharging; Supercharging is compressed on moment and accomplishes, and the fluid moment that is about to the pressurized cylinder rod chamber is filled into the compacting main piston and exerts pressure in the chamber, causes compacting main piston cavity volume Volume Changes; Final pressure is under the fellowship of the Volume Changes of fluid elastic modelling quantity, material elastic modelling quantity, material, to form; Because material elastic modelling quantity and volume change differ greatly during each supercharging, finally cause the high-pressure molding pressure oscillation, and since pressurization accomplish in moment; The high pressure pressing stage time is too short, and the gas in the adobe can't be discharged and caused mass defects such as aliquation occurring after the adobe demoulding.
The diversity of hydraulic variable displacement pump Variable Control mode provides more multipath for the deficiency that solves above-mentioned control mode; Permanent power and variable pump possesses the function that low pressure and mass flow and high-pressure low-flow are provided simultaneously; And the pressure that permanent power and variable pump carries by function can let the cutoff pressure repeatable accuracy is high, response rapidly, reliability is high, its output flow raises with pressure and " the hyperbola pressure flow characteristics auto " that reduce automatically can be good at being applied to the flyash brick make-up machine.
Summary of the invention
To be solved by this inventionly be that flyash brick hydraulic forming machine green brick forming pressure repeatable accuracy is poor, poor reliability and the flyash brick apparent size that causes, the problem that the resistance to compression pressure oscillation is big, and a kind of hydraulic forming machine briquetting pressure control system and control method are proposed.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be: a kind of hydraulic forming machine briquetting pressure is controlled system; Comprise controller and hydraulic system; Hydraulic system comprises high pressure variable constant output pump, low pressure variable amount constant output pump and accumulator; The outlet of low pressure variable amount constant output pump is connected with the safety valve I through fluid pressure line, and the safety valve I is connected to the oil-in of check valve I through hydraulic circuit, and the oil-out of check valve I is divided into two-way; One the road is connected to accumulator, and another road is connected to the oil-in of check valve II; The outlet of high pressure variable constant output pump is connected with the safety valve II through fluid pressure line; The safety valve II is connected to the oil-in of unidirectional electromagnetic switch valve through hydraulic circuit; The oil-out of the oil-out of unidirectional electromagnetic switch valve and check valve II and connect after be divided into two-way; One the road is connected to the compacting loop, and another road is connected with accumulator through the electromagnetic switch control valve; The oil-out of unidirectional electromagnetic switch valve is connected with pressure sensor through the pressure measurement flexible pipe, is connected with pressure switch through hydraulic circuit between accumulator and the electromagnetic switch control valve.
The oil-out of said check valve I also is connected with demoulding loop.
The signal output part of said pressure sensor and pressure switch is connected with the control end of electromagnetic switch control valve.
The compress control method of hydraulic forming machine briquetting pressure control system; Control the break-make of unidirectional electromagnetic switch valve and electromagnetic switch control valve through controller; By high pressure variable constant output pump control briquetting pressure; Briquetting pressure equals the cutoff pressure of high pressure variable constant output pump, pressing process comprises low, middle pressure compacting and high pressure compacting
When low, middle pressure was suppressed, the electromagnetic switch control valve was opened, and acting in conjunction after the hydraulic oil of low pressure variable amount constant output pump and the output of high pressure variable constant output pump confluxes is simultaneously to suppressing loop and accumulator fuel feeding;
During the high pressure compacting; The electromagnetic switch control valve is closed; The pressure of check valve II oil-out is greater than the pressure of oil-in; Path between check valve II automatic cutoff low variable constant output pump and the compacting loop, low pressure variable amount constant output pump are to the accumulator fuel feeding, and high pressure variable constant output pump is separately to compacting loop fuel feeding;
In pressing process, pressure sensor detects briquetting pressure, when detecting briquetting pressure and be higher than the cutoff pressure of high pressure variable constant output pump, controls unidirectional electromagnetic switch valve and closes; Pressure switch detects energy storage pressure, and when detecting energy storage pressure greater than the cutoff pressure of low pressure variable amount constant output pump, control electromagnetic switch control valve and unidirectional electromagnetic switch valve are closed.
The pressure release stage can recover energy to accumulator through the electromagnetic switch control valve after compacting finished.
The invention has the beneficial effects as follows: control the break-make of unidirectional electromagnetic switch valve and electromagnetic switch control valve through controller, according to setting program automatically switch low, middle pressure compacting and high pressure compacting.Pressure sensor and pressure switch play a protective role, and when pressure surpasses predetermined value, cut off oil circuit automatically.Adopt permanent power and variable pump directly to be pressurized to briquetting pressure, the briquetting pressure control method is simple, repeatable accuracy is high, response is rapid, reliability is high, has significantly improved the green brick forming quality.Simplified hydraulic circuit, method for using is simple and reliable.
Description of drawings
Fig. 1 is a hydraulic system principle figure of the present invention.
Mark among the figure: 1, high pressure variable constant output pump, 2, low pressure variable amount constant output pump, 3, the safety valve II, 4, the safety valve I; 5, unidirectional electromagnetic switch valve, 6, the check valve I, 7, pressure sensor; 8, check valve II, 9, the electromagnetic switch control valve, 10, pressure switch; 11, accumulator, 12, the compacting loop, 13, demoulding loop.
The specific embodiment
As shown in the figure, a kind of hydraulic forming machine briquetting pressure is controlled system, comprises controller and hydraulic system; Hydraulic system comprises high pressure variable constant output pump 1, low pressure variable amount constant output pump 2 and accumulator 11; The outlet of low pressure variable amount constant output pump 2 is connected with safety valve I 4 through fluid pressure line, and safety valve I 4 is connected to the oil-in of check valve I 6 through hydraulic circuit, and the oil-out of check valve I 6 is divided into two-way; One the road is connected to accumulator 11, and another road is connected to the oil-in of check valve II 8; The outlet of high pressure variable constant output pump 1 is connected with safety valve II 3 through fluid pressure line; Safety valve II 3 is connected to the oil-in of unidirectional electromagnetic switch valve 5 through hydraulic circuit; The oil-out of the oil-out of unidirectional electromagnetic switch valve 5 and check valve II 8 and connect after be divided into two-way; One the road is connected to compacting loop 12, and another road is connected with accumulator 11 through electromagnetic switch control valve 9; The oil-out of unidirectional electromagnetic switch valve 5 is connected with pressure sensor 7 through the pressure measurement flexible pipe, is connected with pressure switch 10 through hydraulic circuit between accumulator 11 and the electromagnetic switch control valve 9.
The oil-out of said check valve I 6 also is connected with demoulding loop 13.
The signal output part of said pressure sensor 7 and pressure switch 10 is connected with the control end of electromagnetic switch control valve 9.
High pressure variable constant output pump 1 is controlled by electromagnetic switch control valve 9 with the break-make of accumulator 11 oil circuits, and high pressure variable constant output pump 1 is the batch (-type) fuel feeding to accumulator 11.Low pressure variable amount constant output pump 2 directly is connected with accumulator 11, and low pressure variable amount constant output pump 2 continues fuel feeding to accumulator 11.The cutoff pressure of high pressure variable constant output pump 1 and low pressure variable amount constant output pump 2 is adjustable.Electromagnetic switch control valve 9 is normally closed function, and unidirectional electromagnetic switch valve 5 is normal start ability.
The compress control method of hydraulic forming machine briquetting pressure control system does; Control the break-make of unidirectional electromagnetic switch valve 5 and electromagnetic switch control valve 9 through controller; By high pressure variable constant output pump 1 control briquetting pressure; Briquetting pressure equals the cutoff pressure of high pressure variable constant output pump 1, pressing process comprises low, middle pressure compacting and high pressure compacting;
When low, middle pressure was suppressed, electromagnetic switch control valve 9 was opened, and acting in conjunction after the hydraulic oil of low pressure variable amount constant output pump 2 and 1 output of high pressure variable constant output pump confluxes is simultaneously to compacting loop 12 and accumulator 11 fuel feeding;
During the high pressure compacting; Electromagnetic switch control valve 9 is closed; The pressure of check valve II 8 oil-outs is greater than the pressure of oil-in; Path between check valve II 8 automatic cutoff low variable constant output pumps 2 and the compacting loop 12, low pressure variable amount constant output pump 2 are to accumulator 11 fuel feeding, and high pressure variable constant output pump 1 is separately to compacting loop 12 fuel feeding;
In pressing process, pressure sensor 7 plays a protective role with pressure switch 10, and pressure sensor 7 detects briquetting pressures, when detecting briquetting pressure and be higher than the cutoff pressure of high pressure variable constant output pump 1, controls unidirectional electromagnetic switch valve 5 and closes; Pressure switch 10 detects accumulators 11 pressure, and when detecting accumulator 11 pressure greater than the cutoff pressure of low pressure variable amount constant output pump 2, control electromagnetic switch control valve 9 and unidirectional electromagnetic switch valve 5 are closed.
The pressure release stage can recover energy to accumulator 11 through electromagnetic switch control valve 9 after compacting finished.
As shown in the figure; When in the low pressure compacting reaches, suppressing, unidirectional electromagnetic switch valve 5 is opened, and high pressure variable constant output pump 1 passes through unidirectional electromagnetic switch valve 5 directly to compacting loop 12 fuel feeding; Low pressure variable amount constant output pump 2 output fluid conflux the back to compacting loop 12 fuel feeding through check valve II 8 and high pressure variable constant output pump 1 output fluid; Electromagnetic switch control valve 9 is opened, and accumulator 11 is communicated with compacting loop 12, as auxiliary power source to suppressing loop 12 fuel feeding; Controller is according to the program of setting, and after compacting of completion low pressure and middle the compacting, control electromagnetic switch control valve 9 is closed; Begin to carry out the high pressure pressing process, when carrying out high pressure compacting action, low pressure variable amount constant output pump 2 continues the output low-pressure hydraulic oil; To accumulator 11 topping ups, high pressure variable constant output pump 1 is output high-pressure and hydraulic oil automatically, directly transfers to compacting loop 12; High-pressure and hydraulic oil is exported to such an extent that low-pressure hydraulic oil cuts off automatically through check valve II 8 and low pressure variable amount constant output pump 2; Electromagnetic switch control valve 9 is closed, the hydraulic oil of cutoff high variable constant output pump 1 output and the oil circuit of accumulator 11, and the effect of compacting loop 12 oil pressure high pressure variable constant output pumps 1 continues to raise down; Up to its high pressure cutoff pressure setting value, high pressure variable constant output pump 1 high pressure is by off-load.Pressure switch 10 and pressure sensor 7 are as protecting component; Pressure by pressure switch 10 and pressure sensor 7 detection present positions; Control unidirectional electrical magnetic switch valve 5 cuts out when detecting point pressure of living in above its setting value; Cutoff high variable constant output pump 1 outlet oil circuit, cutoff high variable constant output pump 1 high pressure is accomplished the high pressure pressing function by off-load.
Claims (6)
1. a hydraulic forming machine briquetting pressure is controlled system; Comprise controller and hydraulic system; It is characterized in that: hydraulic system comprises high pressure variable constant output pump (1), low pressure variable amount constant output pump (2) and accumulator (11); The outlet of low pressure variable amount constant output pump (2) is connected with safety valve I (4) through fluid pressure line, and safety valve I (4) is connected to the oil-in of check valve I (6) through hydraulic circuit, and the oil-out of check valve I (6) is divided into two-way; One the road is connected to accumulator (11), and another road is connected to the oil-in of check valve II (8); The outlet of high pressure variable constant output pump (1) is connected with safety valve II (3) through fluid pressure line; Safety valve II (3) is connected to the oil-in of unidirectional electromagnetic switch valve (5) through hydraulic circuit; The oil-out of the oil-out of unidirectional electromagnetic switch valve (5) and check valve II (8) and connect after be divided into two-way; One the road is connected to compacting loop (12), and another road is connected with accumulator (11) through electromagnetic switch control valve (9); The oil-out of unidirectional electromagnetic switch valve (5) is connected with pressure sensor (7) through the pressure measurement flexible pipe, is connected with pressure switch (10) through hydraulic circuit between accumulator (11) and the electromagnetic switch control valve (9).
2. a kind of hydraulic forming machine briquetting pressure as claimed in claim 1 is controlled system, and it is characterized in that: the oil-out of said check valve I (6) also is connected with demoulding loop (13).
3. a kind of hydraulic forming machine briquetting pressure as claimed in claim 1 is controlled system, and it is characterized in that: the signal output part of said pressure sensor (7) and pressure switch (10) is connected with the control end of electromagnetic switch control valve (9).
4. the compress control method of hydraulic forming machine briquetting pressure control system; It is characterized in that: the break-make of controlling unidirectional electromagnetic switch valve (5) and electromagnetic switch control valve (9) through controller; By high pressure variable constant output pump (1) control briquetting pressure; Briquetting pressure equals the cutoff pressure of high pressure variable constant output pump (1), pressing process comprises low, middle pressure compacting and high pressure compacting
When low, middle pressure was suppressed, electromagnetic switch control valve (9) was opened, and acting in conjunction after the hydraulic oil of low pressure variable amount constant output pump (2) and high pressure variable constant output pump (1) output confluxes is simultaneously to suppressing loop (12) and accumulator (11) fuel feeding;
During the high pressure compacting; Electromagnetic switch control valve (9) is closed; The pressure of check valve II (8) oil-out is greater than the pressure of oil-in; Path between automatic cutoff low variable constant output pump (2) of check valve II (8) and the compacting loop (12), low pressure variable amount constant output pump (2) are to accumulator (11) fuel feeding, and high pressure variable constant output pump (1) is separately to compacting loop (12) fuel feeding.
5. a kind of hydraulic forming machine briquetting pressure as claimed in claim 4 is controlled the compress control method of system; It is characterized in that: in pressing process; Pressure sensor (7) detects briquetting pressure; When detecting briquetting pressure and be higher than the cutoff pressure of high pressure variable constant output pump (1), control unidirectional electromagnetic switch valve (5) and close; Pressure switch (10) detects accumulator (11) pressure, and when detecting accumulator (11) pressure greater than the cutoff pressure of low pressure variable amount constant output pump (2), control electromagnetic switch control valve (9) and unidirectional electromagnetic switch valve (5) are closed.
6. a kind of hydraulic forming machine briquetting pressure as claimed in claim 4 is controlled the compress control method of system, it is characterized in that: the pressure release stage can recover energy to accumulator (11) through electromagnetic switch control valve (9) after compacting finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110334288.2A CN102501401B (en) | 2011-10-29 | 2011-10-29 | Molding pressure control system for hydraulic molding machine and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110334288.2A CN102501401B (en) | 2011-10-29 | 2011-10-29 | Molding pressure control system for hydraulic molding machine and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102501401A true CN102501401A (en) | 2012-06-20 |
| CN102501401B CN102501401B (en) | 2014-04-09 |
Family
ID=46213563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110334288.2A Active CN102501401B (en) | 2011-10-29 | 2011-10-29 | Molding pressure control system for hydraulic molding machine and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102501401B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110315630A (en) * | 2019-05-06 | 2019-10-11 | 西安银马实业发展有限公司 | A kind of application of hydraulic press sensor in hydrostatic profile |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5158723A (en) * | 1988-06-10 | 1992-10-27 | Ulrico Walchhutter | Method and apparatus for hydraulic pressing |
| CN2146359Y (en) * | 1992-09-28 | 1993-11-17 | 机械电子工业部北京机电研究所 | Superplastic forming hydraulic press |
| JP2001287099A (en) * | 2000-03-30 | 2001-10-16 | Hitachi Chem Co Ltd | Method and apparatus for parallel control of hydraulic press |
| EP1213174A1 (en) * | 2000-12-08 | 2002-06-12 | Brueninghaus Hydromatik Gmbh | Rotational speed control device and method of controlling an output rotational speed of a hydrostatic drive |
| JP2003166501A (en) * | 2001-11-28 | 2003-06-13 | Meiki Co Ltd | Compression force control method of press |
| CN2633546Y (en) * | 2003-07-23 | 2004-08-18 | 上海华岛液压设备制造有限公司 | Hydraulic controller for floor brick press |
| JP2004308736A (en) * | 2003-04-04 | 2004-11-04 | Ebara Corp | Hydraulic device and its control method |
| CN200947075Y (en) * | 2006-07-11 | 2007-09-12 | 谢永杰 | Multifunctional hydraulic testing machine |
| CN201026645Y (en) * | 2007-03-30 | 2008-02-27 | 付炳方 | Forming machine for concrete member |
| CN101531028A (en) * | 2009-03-02 | 2009-09-16 | 宁波职业技术学院 | A concrete block molding machine hydraulic system |
| CN201645606U (en) * | 2010-04-19 | 2010-11-24 | 天津欧陆重工机械制造有限公司 | Hydraulic control system of full-automatic flyash tile press |
| CN202344888U (en) * | 2011-10-29 | 2012-07-25 | 洛阳中冶重工机械有限公司 | Moulding pressure control system for hydraulic moulding machine |
-
2011
- 2011-10-29 CN CN201110334288.2A patent/CN102501401B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5158723A (en) * | 1988-06-10 | 1992-10-27 | Ulrico Walchhutter | Method and apparatus for hydraulic pressing |
| CN2146359Y (en) * | 1992-09-28 | 1993-11-17 | 机械电子工业部北京机电研究所 | Superplastic forming hydraulic press |
| JP2001287099A (en) * | 2000-03-30 | 2001-10-16 | Hitachi Chem Co Ltd | Method and apparatus for parallel control of hydraulic press |
| EP1213174A1 (en) * | 2000-12-08 | 2002-06-12 | Brueninghaus Hydromatik Gmbh | Rotational speed control device and method of controlling an output rotational speed of a hydrostatic drive |
| JP2003166501A (en) * | 2001-11-28 | 2003-06-13 | Meiki Co Ltd | Compression force control method of press |
| JP2004308736A (en) * | 2003-04-04 | 2004-11-04 | Ebara Corp | Hydraulic device and its control method |
| CN2633546Y (en) * | 2003-07-23 | 2004-08-18 | 上海华岛液压设备制造有限公司 | Hydraulic controller for floor brick press |
| CN200947075Y (en) * | 2006-07-11 | 2007-09-12 | 谢永杰 | Multifunctional hydraulic testing machine |
| CN201026645Y (en) * | 2007-03-30 | 2008-02-27 | 付炳方 | Forming machine for concrete member |
| CN101531028A (en) * | 2009-03-02 | 2009-09-16 | 宁波职业技术学院 | A concrete block molding machine hydraulic system |
| CN201645606U (en) * | 2010-04-19 | 2010-11-24 | 天津欧陆重工机械制造有限公司 | Hydraulic control system of full-automatic flyash tile press |
| CN202344888U (en) * | 2011-10-29 | 2012-07-25 | 洛阳中冶重工机械有限公司 | Moulding pressure control system for hydraulic moulding machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110315630A (en) * | 2019-05-06 | 2019-10-11 | 西安银马实业发展有限公司 | A kind of application of hydraulic press sensor in hydrostatic profile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102501401B (en) | 2014-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204476884U (en) | A kind of hydraulic system of polyurethane handrail joint moulding press | |
| CN105150356A (en) | Hydraulic control system for brick machine and fully-automatic bidirectionally-pressing hydraulic control method of hydraulic control system | |
| CN201665025U (en) | Stepless adjustable constant pressure control oil-way system for upper hydraulic cushion of hydraulic press | |
| CN110864021B (en) | Synchronous control system for hydraulic oil cylinder of cubic press | |
| CN202344888U (en) | Moulding pressure control system for hydraulic moulding machine | |
| CN105058554A (en) | Oil cylinder assembly and full-automatic two-way pressurizing hydraulic brick press with same | |
| CN202239624U (en) | Electrohydraulic proportional control system for powder hydraulic press | |
| CN101768990A (en) | Hydraulic constant power control device for excavator | |
| CN102501401B (en) | Molding pressure control system for hydraulic molding machine and control method thereof | |
| CN102734237B (en) | Energy accumulator system and water pump system | |
| CN103939738B (en) | Control method of valve low temperature detection helium gas recycling system | |
| CN101664797A (en) | Material injection device of die casting machine | |
| CN207028120U (en) | Fervent hydraulic control system in a kind of high pressing mold | |
| CN203809417U (en) | Multifunctional hydraulic test device | |
| CN210240183U (en) | Energy-saving ultrahigh-pressure pulse test bed for electromagnetic directional valve | |
| CN202091297U (en) | Hydraulic constant pressure control system of calender | |
| CN101514948B (en) | Quick pressurization system for steel pipe hydrostatic tester | |
| CN110370443B (en) | High-pressure forming slurry curve pressurizing device and method | |
| CN215397062U (en) | Hydraulic machine for powder compression molding | |
| CN104564630B (en) | Digital intelligent color paste pump | |
| CN203344276U (en) | Novel direct-pressure mold clamping oil line formed through compressive injection molding | |
| CN202934827U (en) | Hydraulic oil press | |
| CN108818883B (en) | Ceramic press electrohydraulic control method and system | |
| CN101837440B (en) | Injection device of cold-chamber die casting machine | |
| CN107559264B (en) | Accumulator flow experimental rig |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 471003 Qinling Mountains South Road, Jianxi District, Luoyang, Henan Patentee after: LUOYANG ZHONGYE HEAVY INDUSTRY MACHINERY CO.,LTD. Address before: 471003 Qinling Mountains South Road, Jianxi District, Luoyang, Henan Patentee before: LUOYANG ZHONGYE HEAVY INDUSTRY MACHINERY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230817 Address after: Building 3 of MCC Heavy Industry, No. 369 Qinling Road, Jianxi District, Luoyang City, Henan Province, 471000 Patentee after: Luoyang Tengheda Intelligent Equipment Co.,Ltd. Address before: 471003 Qinling Mountains South Road, Jianxi District, Luoyang, Henan Patentee before: LUOYANG ZHONGYE HEAVY INDUSTRY MACHINERY CO.,LTD. |