CN101774005A - Oil-electric hybrid cold-chamber die casting machine injection system - Google Patents
Oil-electric hybrid cold-chamber die casting machine injection system Download PDFInfo
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- CN101774005A CN101774005A CN200910104968A CN200910104968A CN101774005A CN 101774005 A CN101774005 A CN 101774005A CN 200910104968 A CN200910104968 A CN 200910104968A CN 200910104968 A CN200910104968 A CN 200910104968A CN 101774005 A CN101774005 A CN 101774005A
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Abstract
The invention relates to an oil-electric hybrid cold-chamber die casting machine injection system, which comprises a feeding tube, an injection rod, a servomotor controller and a hydraulic pressurizer, a servomotor drives the injection rod in order to control the injection speed in the process of injection, and the hydraulic pressurizer cooperates with the servomotor controller to drive the injection rod in order to control rapid pressurization in the process of injection. The injection speed is controlled by the servomotor, the servomotor controls multi-stage slow speed, uniform acceleration, multi-stage high speed, speed reduction and braking in the process of injection, and can realize the multi-stage stepless regulation of the injection speed, consequently, flash can be avoided in the die casting, and high-quality net-shaped products can be shaped. Meanwhile, a hydraulic system is utilized to carry out pressurization, pressurization is independently controlled, which can help to shorten the pressurization time, consequently, a large motor does not need to be adopted in order to achieve high increased pressure, and thereby the cost is reduced.
Description
Technical field
The present invention relates to cold-chamber die casting machine, more particularly, relate to the cold-chamber die casting machine injection system that a kind of novel oil electricity mixes.
Background technology
At present, it is power that the injection system of traditional both at home and abroad cold-chamber die casting machine generally all adopts hydraulic pressure, realizes the compression casting of metal (aluminium alloy, magnesium alloy, copper alloy etc.), specifically moves as follows:
Alloy liquid is fed into the barrel of going into of die casting machine by soup feeding machine (feeding device) from holding furnace, drive injection rod by hydraulic system then and advance, promote alloy liquid carry out at a slow speed, at a high speed, supercharging, injection rod is followed out and return the extrusion process of hammer.
At a slow speed, at a high speed the process, steady and the ripple disable of the control of requirement speed, reduce in the injection process and roll up gas, when filling type and finishing, hydraulic system drives pressure charging system, thereby advances injection rod, realize the supercharging feeding in the metal cooling procedure, make the metallic article interior solid, the final molding goods, this stage is carried out the supercharging of injection;
After the supercharging action was finished, moving platen moved, and draws back dynamic model, and injection rod and moving platen advance with the speed that equates, released the part of goods on cover half, and this stage realizes that injection rod is followed out in the injection;
When follow out finish after, hydraulic system drives the injection rod rollback to initial position, carries out next circulation.
In die cast, the supercharging action is even more important, and is the important leverage of die cast product property.Yet, the boost pressure of cold-chamber die casting machine is big (medium-sized die casting machine pressurized energy is about 400kN-900kN, large-scale die-casting machine is 1000kN-2500kN) very, traditional die casting machine is all realized with hydraulic pressure, realize so big boost pressure if adopt motor, need will cause cost to improve than relatively large motor.
This traditional hydraulic type die casting machine not only needs to use bigger oil pressure actuated source, needs bigger energy consumption, and the pollution that inevitably brings hydraulic oil.Meanwhile, because the compressibility and the leakage of hydraulic oil, hydraulic drive can not guarantee strict gearratio, the accuracy and the precision of injection process medium velocity are wayward, velocity shooting control is single, the fluctuation of each section injection speed is bigger, rolls up gas in the injection process easily, all is limitation for the quality of raising die cast product, the clean moulding of goods.Therefore, the electronic die casting machine of development is imperative.
Summary of the invention
The technical problem to be solved in the present invention is, above-mentioned traditional oils pressure type die casting machine at prior art needs big oil pressure actuated source and the accuracy of energy consumption and wayward injection process medium velocity and the defective of precision, the cold-chamber die casting machine injection system that provides a kind of oil electricity to mix.
The technical solution adopted for the present invention to solve the technical problems is: construct the cold-chamber die casting machine injection system that a kind of oil electricity mixes, include barrel and injection rod, it also comprises servomotor control device and hydraulic pressure intensifier, the described injection rod of described driven by servomotor is with the injection speed in the control injection process, and described hydraulic pressure intensifier cooperates the servomotor control device to drive described injection rod with the quick supercharging in the control injection process.
In cold-chamber die casting machine injection system of the present invention, described hydraulic pressure intensifier comprises the supercharging cylinder body, the hydraulic system that is installed in the charged piston in the described supercharging cylinder body and is connected with described charged piston, described servomotor control device comprises the servomotor that is installed on the described supercharging cylinder body and fixedlys connected with described injection rod and can drive its straight-line STATEMENT OF FEDERALLY SPONSORED, described charged piston is driven by described hydraulic system, described STATEMENT OF FEDERALLY SPONSORED is crossed described supercharging cylinder body and is connected with charged piston and with described servomotor, and described STATEMENT OF FEDERALLY SPONSORED drives described injection rod moving linearly under the driving of described servomotor and charged piston.
In cold-chamber die casting machine injection system of the present invention, described STATEMENT OF FEDERALLY SPONSORED comprises a rotating shaft that is connected with described servomotor, is equipped with between described rotating shaft and the charged piston to be used for the bearing that rotating shaft is rotated; Described rotating shaft inside is hollow-core construction, is provided with the leading screw of fixedlying connected with described injection rod by the leading screw fastener; Described leading screw is rotationally connected by feed screw nut and the described rotating shaft that is arranged in the described rotating shaft.
In cold-chamber die casting machine injection system of the present invention, described STATEMENT OF FEDERALLY SPONSORED comprises a leading screw that is connected with described servomotor, is equipped with between described leading screw and the charged piston to be used for the bearing that leading screw rotates; Described injection rod is connected with a feed screw nut fixture, and described feed screw nut fixture is provided with feed screw nut; Described leading screw is rotationally connected by described feed screw nut and described feed screw nut fixture.
In cold-chamber die casting machine injection system of the present invention, described rotating shaft of described driven by servomotor and feed screw nut rotate, transmission mechanism by feed screw nut and leading screw converts rotatablely moving of feed screw nut the rectilinear motion of leading screw to, and then promotes injection rod with described propelling mould of going into alloy liquid in the barrel by leading screw.
In cold-chamber die casting machine injection system of the present invention, described servomotor drives leading screw and rotates, transmission mechanism by feed screw nut and leading screw rotatablely moves leading screw and converts the rectilinear motion of feed screw nut to, and then promotes injection rod by feed screw nut and will be described go into alloy liquid propelling mould in the barrel.
In cold-chamber die casting machine injection system of the present invention, described hydraulic system comprises pressure sensor, reversal valve, check valve, the supercharging accumulator, flow control valve, Oil pump electrical machinery, oil pump, fuel tank, oil suction filter and cooler, described Oil pump electrical machinery drives oil pump work, described oil pump with hydraulic oil by described oil suction filter from fuel tank sucking-off to described supercharging cylinder body, the hydraulic oil of described supercharging accumulator deposit specified pressure and volume, unnecessary hydraulic oil flows back to fuel tank from described flow control valve, wherein said check valve is used for preventing that the hydraulic oil of supercharging accumulator from flowing back to oil pump; In the oil circuit of supercharging, described reversal valve is used to control the action of supercharging, and described pressure sensor is used to detect boost pressure, and the hydraulic oil in the described supercharging cylinder body flows back to fuel tank through reversal valve and cooler.
In cold-chamber die casting machine injection system of the present invention, the multistage that described servomotor control device is used for injection process at a slow speed, evenly quicken, multistage at a high speed, the control of slowing-down brake, described hydraulic pressure intensifier is used for the quick pressurization control of injection process.
In cold-chamber die casting machine injection system of the present invention, after described quick plenum was finished, moving platen moved and draws back dynamic model, and described injection rod and moving platen advance with the speed that equates, released the part of goods on cover half, realized that injection rod is followed out in the injection.
Implement the cold-chamber die casting machine injection system that oil electricity of the present invention mixes, have following beneficial effect: injection speed is controlled by servomotor, the real-time closed-loop control of formation speed, injection power, servomotor is realized (multistage), even acceleration at a slow speed in the injection process, the control of (multistage), slow down (brake) at a high speed, the multistage of realizing injection speed is stepless adjustable, the response time weak point of good reproducibility, acceleration and the deceleration of the steady ripple disable of injection speed, injection speed, the accuracy height of injection, thereby the quality of raising goods; Injection control is accurate, the clean moulded products of moulding; Servomotor control is accomplished to save the energy, improves Environmental Protection Level, reduces noise, is shortened the production cycle; Utilize hydraulic system to realize the purpose of supercharging, supercharging is controlled separately to be beneficial to realize shortening and is built the pressure time, avoids simultaneously adopting large-size machine in order to reach bigger pressurized energy, thereby reduces cost.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the theory structure schematic diagram of first embodiment of the electric cold-chamber die casting machine injection system that mixes of the present invention's oil;
Fig. 2 is the theory structure schematic diagram of second embodiment of the electric cold-chamber die casting machine injection system that mixes of the present invention's oil;
Fig. 3 is speed, the pressure in the press casting procedure of embodiment illustrated in figures 1 and 2, the curve synoptic diagram of injection rod displacement.
Reference numeral is as follows: go into barrel 1, injection rod 2, leading screw fastener 3, feed screw nut 4, rotating shaft 5, supercharging cylinder body 6, charged piston 7, servomotor 8, pressure sensor 11, reversal valve 12, check valve 13, supercharging accumulator 14, flow control valve 15, oil pump 16, Oil pump electrical machinery 17, fuel tank 18, oil suction filter 19, cooler 20, bearing 21, leading screw 22, feed screw nut fixture 23.
The specific embodiment
In order to make technical problem to be solved by this invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 1 is the theory structure schematic diagram of first embodiment of the electric cold-chamber die casting machine injection system that mixes of the present invention's oil.Cold-chamber die casting machine injection system shown in Figure 1 comprises servomotor control device, hydraulic pressure intensifier.Injection system of the present invention adopts oily electric mixed structure, its injection action is divided at a slow speed (multistage), even acceleration, (multistage), deceleration (brake), supercharging fast at a high speed, injection rod is followed out and return hammer, the servomotor control device is realized speed control different in the press casting procedure, the multistage of realizing injection speed is stepless adjustable, hydraulic pressure intensifier cooperates the quick supercharging in the Servocontrol device realization press casting procedure, realize the quick supercharging feeding of metal in the injection process, thereby realize the non-trimming function of die casting, the clean moulded products that moulding is high-quality.
In Fig. 1, supercharging cylinder body 6 and charged piston 7 are crossed in the rotating shaft 5 in the servomotor control device among the present invention, between rotating shaft 5 and the charged piston 7 bearing 21 are installed, so that the rotation of rotating shaft 5.Feed screw nut 4 is fixed in the rotating shaft 5, and rotating shaft 5 is connected with servomotor 8, reaches the purpose that servomotor 8 drives feed screw nut 4 rotations with this; Injection rod 2 is connected with leading screw fastener 3, and leading screw 22 is fixed on the leading screw fastener 3.Leading screw 22 is installed in the inside of feed screw nut 4; Rotating shaft 5 inside are hollow-core construction, with the space as leading screw 22 motions.Leading screw fastener 3, feed screw nut 4, rotating shaft 5, leading screw 22 promptly are the STATEMENT OF FEDERALLY SPONSORED that is driven and driven by hydraulic system by servomotor 8.
In Fig. 1, the servomotor 8 among the present invention is installed on the supercharging cylinder body 6, and charged piston 7 is installed in supercharging cylinder body 6 inside.Oil pump electrical machinery 17 drives oil pump 16 work, and oil pump 16 by oil suction filter 19 sucking-off from fuel tank 18, is supplied with hydraulic pressure intensifier of the present invention with hydraulic oil.The hydraulic oil of supercharging accumulator 14 deposit authorized pressures and volume, unnecessary hydraulic oil flows back to fuel tank 18 from flow control valve 15, and check valve 13 prevents that the hydraulic oil in the supercharging accumulator 14 from flowing back to oil pump 16.In the oil circuit of supercharging, the action of reversal valve 12 control superchargings, pressure sensor 11 detects boost pressure, and the hydraulic oil in the supercharging cylinder body 6 flows back to fuel tank 18 through reversal valve 12 and cooler 20.
In the embodiment of Fig. 1, servomotor 8 drives rotating shaft 5 and feed screw nut 4 rotates, rotatablely moving of feed screw nut 4 converted to the rectilinear motion of leading screw 22 by the transmission mechanism of feed screw nut 4 and leading screw 22, promote injection rod 2 by leading screw 22, injection rod 2 will be gone into alloy liquid propelling mould in the barrel 1, servomotor 8 is realized (multistage) at a slow speed, even acceleration, the control of (multistage), slow down (brake) at a high speed to injection among Fig. 3, realizes that the multistage of injection speed is stepless adjustable; When alloy liquid filling mould was finished, servomotor 8 drove injection rod 2 brake decelerations, to reduce the generation of die cast product overlap, makes goods can reach the target of clean moulding better; Meanwhile, reversal valve 12 in the hydraulic booster control device walks to illustrated the next, hydraulic oil in the supercharging accumulator 14 is put into the back cavity of supercharging cylinder body 6 fast, promotes charged piston 7 and advances, and the hydraulic oil of supercharging cylinder body 6 ante-chambers flow back in the fuel tank 18 through reversal valve 12, cooler 20.Charged piston 7 promotes rotating shaft 5, pressurized energy is passed to leading screw 22 by the feed screw nut 4 that is fastened in the rotating shaft 5, promote injection rod 2 by leading screw 22, by injection rod 2 pressurized energy is acted on the alloy liquid, alloy liquid in the mould is carried out quick supercharging feeding, the final molding goods, hydraulic pressure intensifier is realized the quick function of increasing pressure of injection among Fig. 3.
After quick plenum was finished, moving platen moved, thereby drew back dynamic model, and injection rod 2 and moving platen advance with the speed that equates, released the part of goods on cover half, and injection rod follows out in this stage realization injection.
When injection rod follow out finish after, reversal valve 12 walks in the diagram upper, hydraulic pressure intensifier drives the ante-chamber that hydraulic oil enters supercharging cylinder body 6, promotes charged piston 7 and retreats to the starting position, and the hydraulic oil of supercharging cylinder body 6 back cavities flow back in the fuel tank 18 through reversal valve 12, cooler 20; Meanwhile, servomotor 8 reverse rotations drive injection rod 2 and retreat to the starting position, and injection system carries out next circulation.
Fig. 2 is the theory structure schematic diagram of second embodiment of the electric cold-chamber die casting machine injection system that mixes of the present invention's oil.
In Fig. 2, the leading screw 22 in the servomotor control device among the present invention crosses supercharging cylinder body 6 and charged piston 7, between leading screw 22 and the charged piston 7 bearing 21 is installed, so that the rotation of leading screw 22.Feed screw nut 4 is fixed on the feed screw nut fixture 23, and leading screw 22 is connected with servomotor 8, reaches the purpose that servomotor 8 drives leading screw 22 rotations with this; Injection rod 2 is connected with feed screw nut fixture 23, and feed screw nut 4 is fixed on the feed screw nut fixture 23.Leading screw 22 is installed in the inside of feed screw nut 4.Leading screw 22, feed screw nut fixture 23, feed screw nut 4 promptly are the STATEMENT OF FEDERALLY SPONSORED that is driven and driven by hydraulic system by servomotor 8.
In Fig. 2, the supercharging cylinder body 6 in the hydraulic pressure intensifier among the present invention is fixed on (not shown) on the injection system fixture, and servomotor is installed 8 and is installed on the supercharging cylinder body 6.Charged piston 7 is installed in supercharging cylinder body 6 inside, Oil pump electrical machinery 17 drives oil pump 16 work, hydraulic pump 16 with hydraulic oil by oil suction filter 19 sucking-off from fuel tank 18, supply with hydraulic pressure intensifier of the present invention, the hydraulic oil of supercharging accumulator 14 deposit authorized pressures and volume, unnecessary hydraulic oil flows back to fuel tank 18 from flow control valve 15, check valve 13 prevents that the hydraulic oil in the supercharging accumulator 14 from flowing back to oil pump 16.In the oil circuit of supercharging, the action of reversal valve 12 control superchargings, pressure sensor 11 detects boost pressure, and the hydraulic oil in the supercharging cylinder body 6 flows back to fuel tank 18 through reversal valve 12 and cooler 20.
In the embodiment of Fig. 2, servomotor 8 driving pulleys 10 rotate, thereby driving leading screw 22 rotates, by the transmission mechanism of feed screw nut 4 and leading screw 22 leading screw 22 is rotatablely moved and to convert the rectilinear motion of feed screw nut 4 to, promote injection rod 2 by feed screw nut 4, injection rod 2 will be gone into alloy liquid propelling mould in the barrel 1, and servomotor 8 is realized (multistage) at a slow speed, even acceleration, the control of (multistage), slow down (brake) at a high speed to injection among Fig. 3, and the multistage of realization injection speed is stepless adjustable; When alloy liquid filling mould was finished, servomotor 8 drove injection rod 2 brake decelerations, to reduce the generation of die cast product overlap, makes goods can reach the target of clean moulding better; Meanwhile, reversal valve 12 in the hydraulic booster control device walks to illustrated the next, hydraulic oil in the supercharging accumulator 14 is put into supercharging cylinder body 6 fast, promotes charged piston 7 and advances, and the hydraulic oil of supercharging cylinder body 6 ante-chambers flow back in the fuel tank 18 through reversal valve 12, cooler 20.Charged piston 7 promotes leading screw 22, leading screw 22 is passed to feed screw nut 4 with pressurized energy, promote injection rod 2 by feed screw nut 4 by leading screw fixture 23, by injection rod 2 pressurized energy is acted on the alloy liquid, alloy liquid in the mould is carried out quick supercharging feeding, the final molding goods, hydraulic pressure intensifier is realized the quick function of increasing pressure of injection among Fig. 3.
After quick plenum was finished, moving platen moved, thereby drew back dynamic model, and injection rod 2 and moving platen advance with the speed that equates, released the part of goods on cover half, and injection rod follows out in this stage realization injection.
When injection rod follow out finish after, reversal valve 12 walks in the diagram upper, hydraulic pressure intensifier drives the ante-chamber that hydraulic oil enters supercharging cylinder body 6, promotes charged piston 7 and retreats to the starting position, and the hydraulic oil of supercharging cylinder body 6 back cavities flow back in the fuel tank 18 through reversal valve 12, cooler 20; Meanwhile, servomotor 8 reverse rotations drive injection rod 2 and retreat to the starting position, and injection system carries out next circulation.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, any modification of being done within every the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. cold-chamber die casting machine injection system that oil electricity mixes, include barrel and injection rod, it is characterized in that, also comprise servomotor control device and hydraulic pressure intensifier, the described injection rod of described driven by servomotor is with the injection speed in the control injection process, and described hydraulic pressure intensifier cooperates the servomotor control device to drive described injection rod with the quick supercharging in the control injection process.
2. cold-chamber die casting machine injection system according to claim 1, it is characterized in that, described hydraulic pressure intensifier comprises the supercharging cylinder body, the hydraulic system that is installed in the charged piston in the described supercharging cylinder body and is connected with described charged piston, described servomotor control device comprises the servomotor that is installed on the described supercharging cylinder body and fixedlys connected with described injection rod and can drive its straight-line STATEMENT OF FEDERALLY SPONSORED, described charged piston is driven by described hydraulic system, described STATEMENT OF FEDERALLY SPONSORED is crossed described supercharging cylinder body and is connected with charged piston and with described servomotor, and described STATEMENT OF FEDERALLY SPONSORED drives described injection rod moving linearly under the driving of described servomotor and charged piston.
3. cold-chamber die casting machine injection system according to claim 2 is characterized in that, described STATEMENT OF FEDERALLY SPONSORED comprises a rotating shaft that is connected with described servomotor, is equipped with between described rotating shaft and the charged piston to be used for the bearing that rotating shaft is rotated; Described rotating shaft inside is hollow-core construction, is provided with the leading screw of fixedlying connected with described injection rod by the leading screw fastener; Described leading screw is rotationally connected by feed screw nut and the described rotating shaft that is arranged in the described rotating shaft.
4. cold-chamber die casting machine injection system according to claim 2 is characterized in that, described STATEMENT OF FEDERALLY SPONSORED comprises a leading screw that is connected with described servomotor, is equipped with between described leading screw and the charged piston to be used for the bearing that leading screw rotates; Described injection rod is connected with a feed screw nut fixture, and described feed screw nut fixture is provided with feed screw nut; Described leading screw is rotationally connected by described feed screw nut and described feed screw nut fixture.
5. cold-chamber die casting machine injection system according to claim 3, it is characterized in that, described rotating shaft of described driven by servomotor and feed screw nut rotate, transmission mechanism by feed screw nut and leading screw converts rotatablely moving of feed screw nut the rectilinear motion of leading screw to, and then promotes injection rod with described propelling mould of going into alloy liquid in the barrel by leading screw.
6. cold-chamber die casting machine injection system according to claim 4, it is characterized in that, described servomotor drives leading screw and rotates, transmission mechanism by feed screw nut and leading screw rotatablely moves leading screw and converts the rectilinear motion of feed screw nut to, and then promotes injection rod by feed screw nut and will be described go into alloy liquid propelling mould in the barrel.
7. according to claim 3 or 4 described cold-chamber die casting machine injection systems, it is characterized in that, described hydraulic system comprises pressure sensor, reversal valve, check valve, the supercharging accumulator, flow control valve, Oil pump electrical machinery, oil pump, fuel tank, oil suction filter and cooler, described Oil pump electrical machinery drives oil pump work, described oil pump with hydraulic oil by described oil suction filter from fuel tank sucking-off to described supercharging cylinder body, the hydraulic oil of described supercharging accumulator deposit specified pressure and volume, unnecessary hydraulic oil flows back to fuel tank from described flow control valve, wherein said check valve is used for preventing that the hydraulic oil of supercharging accumulator from flowing back to oil pump; In the oil circuit of supercharging, described reversal valve is used to control the action of supercharging, and described pressure sensor is used to detect boost pressure, and the hydraulic oil in the described supercharging cylinder body flows back to fuel tank through reversal valve and cooler.
8. according to claim 3 or 4 described cold-chamber die casting machine injection systems, it is characterized in that, the multistage that described servomotor control device is used for injection process at a slow speed, evenly quicken, multistage at a high speed, the control of slowing-down brake, described hydraulic pressure intensifier is used for the quick pressurization control of injection process.
9. cold-chamber die casting machine injection system according to claim 8 is characterized in that, after described quick plenum is finished, moving platen moves and draws back dynamic model, described injection rod and moving platen advance with the speed that equates, release the part of goods on cover half, realize that injection rod is followed out in the injection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101049688A CN101774005B (en) | 2009-01-12 | 2009-01-12 | Oil-electric hybrid cold-chamber die casting machine injection system |
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| CN2009101049688A CN101774005B (en) | 2009-01-12 | 2009-01-12 | Oil-electric hybrid cold-chamber die casting machine injection system |
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| CN101774005B CN101774005B (en) | 2012-05-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869446A (en) * | 2018-08-24 | 2018-11-23 | 中建投（绍兴）机械科技有限公司 | A kind of electro-hydraulic combination synchronized cylinder |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1248476B (en) * | 1990-05-22 | 1995-01-19 | Int Press Dev Est | INJECTION GROUP FOR HYDRAULIC DIE-CASTING MACHINE, EQUIPPED WITH A DEVICE FOR THE ELIMINATION OF INJECTION PRESSURE PEAKS |
| DE19680008C1 (en) * | 1995-05-16 | 2002-01-24 | Globemag L P | Power transmission system directly controlling electrical supply to variable speed motor driving hydraulic positive displacement pump |
| CN1470345A (en) * | 2002-07-22 | 2004-01-28 | 上海一达机械有限公司 | Uniformly accelerated injectino system for die casting machnie |
| CN201061823Y (en) * | 2007-07-10 | 2008-05-21 | 宁波东方压铸机床有限公司 | Press-ejecting oilway device of hot room die casting machine |
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2009
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869446A (en) * | 2018-08-24 | 2018-11-23 | 中建投（绍兴）机械科技有限公司 | A kind of electro-hydraulic combination synchronized cylinder |
| CN108869446B (en) * | 2018-08-24 | 2024-05-10 | 中建投（绍兴）机械科技有限公司 | Electrohydraulic combined synchronous cylinder |
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Effective date of registration: 20160612 Address after: 402160, Phoenix Street, No. 33, Yongchuan District, Chongqing (Fenghuang Lake Industrial Park, Yongchuan Industrial Park, Chongqing) Patentee after: Chongqing Nekon Machinery Co. Ltd. Address before: High tech Industrial Park in clear lake village in Guangdong province Shenzhen city Baoan District 518109 Jin town of Longhua Shenzhen Leadwell Technology Co Ltd Patentee before: Lingwei Sci-Tech Co., Ltd., Shenzhen |