CN101239373B - Vertical pressure charging press-shoot system - Google Patents
Vertical pressure charging press-shoot system Download PDFInfo
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- CN101239373B CN101239373B CN2008100203829A CN200810020382A CN101239373B CN 101239373 B CN101239373 B CN 101239373B CN 2008100203829 A CN2008100203829 A CN 2008100203829A CN 200810020382 A CN200810020382 A CN 200810020382A CN 101239373 B CN101239373 B CN 101239373B
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Abstract
The invention provides a vertical pressure charging pressing system capable of enhancing pressing property, stability and safety of a die casting machine by using a structure with a pressure charging oil cylinder perpendicular to an injection oil cylinder. The slow-press hydraulic oil and the quick-press hydraulic oil enter the rear cavity of an injection oil cylinder through a large-through-diameter solo valve. The pressure charging oil cylinder is perpendicular to the injection oil cylinder, disposed at the upper or lower part and between the solo valve and the injection plug. Two pressure charting starting modes are provided, one depends on pressure feedback of the injection oil cylinder rear cavity, and the other depends on displacement feedback of the injection oil cylinder. When the PLC or the process control machine receives the feedback signal, the pressure charging valve opens, the pressure charging oil cylinder starts to work, the pressure in the rear cavity of the injection oil cylinder increases quickly, the solo valve closes at the same time, and the pressure charging function is completed. The invented system is provided with following advantages: quick injection, the pressure charging channel is large and shot, quick injection speed, short pressure build-up time, long pressure charging distance, and high energy charging type.
Description
Technical field
The present invention relates to a kind of injection system of brand-new die casting machine, be specially adapted to the die casting machine of clamp force greater than 1000TON (10000KN).
Background technology
Modern die casting be a kind of at a high speed, under the hyperbaric environment and can produce the manufacturing process of the die casting motlten metal of accurate, attractive in appearance, stable cast article.Compare with plastic working such as forging, extruding or machining and low pressure casting, die casting has the remarkable advantage that forms the finished parts of complicated shape in short operation consuming time together.Therefore, die casting machine is applicable to the component parts of producing the different shape complexity with cheap price, particularly needs zero, the parts of certain mechanical strength.As various hardware products, toy, the accessory that rubs, auto parts machinery, automobile engine etc.
Injection is the core technology of die casting machine, and fast shot+supercharging is the key of injection.Injection+pressurization is extremely short, following about 0.1 second of 500TON, about 0.2 second of 500-2000TON, the above about 0.3-0.4 of 2000TON second.The quality great majority of die casting determine with 1/10 second position.
Before this, what domestic die casting machine generally adopted is horizontal pressure charging press-shoot system, no matter be that general speed is low slightly, long slightly die casting machine of pressure time is built in supercharging, or speed is high slightly, the pressure time weak point equal horizontal pressure charging press-shoot system of employing of die casting machine that can be used for magnesium alloy pressure-casting is slightly built in supercharging.Horizontal pressure charging press-shoot system structure is seen Fig. 1, and support 18 is provided with top clamping plate 1 and injection portion dress fixed head 3, is provided with pull bar 2 and injection punch head assembly 4 between the two.From injection punch head assembly 4, horizontal direction is disposed with injection oil cylinder, and plate 13 in the oil circuit, oil circuit tailgate 14.This injection oil cylinder comprises shot piston 7 and injection oil cylinder cylinder barrel 8.Plate 13 inside are provided with hole dish 9 and floating piston 10 in oil circuit.Charged piston bar 11 that is mutually permanently connected and charged piston 12 pass plate 13 and oil circuit tailgate 14 in the oil circuit, oil circuit tailgate 14 double as pressurizing cylinder cylinder sleeves.With the oil circuit tailgate 14 vertical supercharging accumulator assemblies 17 that connected; With the 13 vertical two-speed accumulator assemblies 16 that connected of plate in the oil circuit, also be provided with oil circuit upper plate 15 between the two.Two-speed accumulator assembly 16 and supercharging accumulator assembly 17 fuel-displaced hole dish 9 and the floating pistons 10 of all can flowing through.Also being provided with the injection displacement detecting at injection oil cylinder cylinder barrel 8 outer surfaces uses near switch 5 and fast row's assembly 6.
A notable feature of this injection system is that injection oil cylinder all is positioned on the horizontal line in pressurizing cylinder, and another notable feature is that the pressurizing cylinder small bore piston also stretches in the injection oil cylinder cylinder barrel, floats, and custom is referred to as floating piston.Its operation principle is described as follows in conjunction with Fig. 2: system pressure oil has two-way before the injection, and one the tunnel through V1, and V2, V4 give two-speed accumulator ACC1 deposit pressure oil, and custom is referred to as energy storage.Wherein V1, V4 are check valves, and V2 is pressure-reducing valve, be used for regulating two-speed accumulator energy storage pressure.Another road is through V11, and V12 gives the energy storage of supercharging accumulator, and wherein V12 is a check valve, and V11 is pressure-reducing valve, be used for regulating supercharging accumulator energy storage pressure.After the injection instruction was received in the injection unit, the S1 electromagnet of the V3 direction valve of control slow shot got electric, and the injection oil cylinder piston rod slowly promotes injection plunger, and metal liquid is pushed into the mould gate position.The safety electromagnetic iron S4 that then controls the V7 valve of fast shot gets electric, allows the V7 valve to open, and the proportion electro-magnet SS1 that can control openings of sizes simultaneously gets.Two-speed accumulator hydraulic oil is through V7, gap between floating piston and the charged piston bar enters the shot sleeve back cavity, shot sleeve promotes the quick filling mold cavity of molten metal, satisfactory gradually along with filling type, cavity pressure rises rapidly behind the shot sleeve, after pressure rises to setting value, the safety electromagnetic iron S5 of the V10 valve of control supercharging gets, allow the V10 valve to open, the proportion electro-magnet SS2 that can control openings of sizes simultaneously gets, increase the accumulator hydraulic oil and enter the pressurized cylinder back cavity through V10, the pressurized cylinder enlarged bore piston, be charged piston, with charged piston bar mechanical connection, pressure oil promotes charged piston and the charged piston bar moves forward, close taper seat gap between charged piston bar and floating piston, supercharging begins.
This horizontal pressure charging press-shoot system is simple in structure, reliable in action, and pressurizing cylinder is built in the oil circuit control panel, and manufacturing cost is lower, is therefore adopted by domestic most die casting machine.But also there are many weak points in this system:
1, two-speed pressure oil must enter the shot sleeve back cavity through the gap between floating piston and the charged piston bar, owing to be limited by the injection oil cylinder diameter, the intensity of floating piston, charged piston bar and three parts of hole dish, two-speed pressure oil is crossed pasta and is accumulated in bottleneck, and this mechanism is unfavorable for the moment speed-raising of fast shot.
2, crossing pasta for the increasing two-speed amasss, must strengthen the gap between charged piston bar and the floating piston, this mechanism's supercharging prerequisite is that charged piston and floating piston are reliably closed, and this gap is big more, the time that floating piston cuts out is just long more, certainly will elongate supercharging and build the pressure time.Therefore, this mechanism is unfavorable for taking into account simultaneously two-speed speed faster and the pressure time is built in short supercharging.
3, the hole dish stands the floating piston impact of hydraulic oil and high-speed motion for a long time, and very easily there is potential safety hazard in the phenomenon that fracture takes place and come off.
4, be difficult to observe the operation conditions of supercharging stroke.
5, the supercharging stroke is shorter, and charged piston places in the oil circuit control panel, and inconvenience starts pressurized cylinder in advance and realizes that high energy fills type filling the type stage.
Along with developing of automobile industry, large-scale die casting spare demand is increasing, and is also more and more higher to the requirement of die-cast product, and for improving the injection performance of large-scale die-casting machine, at the above-mentioned deficiency of conventional levels pressure charging press-shoot mechanism, it is extremely urgent to research and develop novel injection system.
Summary of the invention
The objective of the invention is to solve the above-mentioned deficiency of conventional levels pressure charging press-shoot mechanism, a kind of injection system that die casting machine injection performance, stability and security all are significantly improved is provided.
Purpose of the present invention is achieved through the following technical solutions:
Vertical pressure charging press-shoot system, comprise the injection oil cylinder that is horizontally set on the support, described injection oil cylinder comprises shot piston and injection oil cylinder cylinder barrel, fast row's assembly and oil circuit board have been connected with described injection oil cylinder, on oil circuit board, also be provided with two-speed accumulator assembly, and this two-speed accumulator assembly and injection oil cylinder cylinder barrel are connected, and have vertically connected pressurizing cylinder with respect to injection oil cylinder, and described pressurizing cylinder includes charged piston bar and charged piston.
Be provided with a check valve in the described oil circuit board, comprise unidirectional valve seat, the nonreturn valve core that sets within it and can move to axial, and the spring socket sleeve of fixedlying connected with unidirectional valve seat are provided with stage clip between described unidirectional valve seat and the spring socket sleeve.Described pressurizing cylinder is between this check valve and shot piston.
Described pressurizing cylinder is vertically set on the level of injection oil cylinder or under the level.Connected supercharging accumulator assembly on the described pressurizing cylinder.
The injection pressure adjustment realizes by adjusting pressurizing cylinder rod chamber pressure, pressurized cylinder rod chamber hydraulic oil overcomes the pressure of the back pressure accumulator that links to each other with pressurized cylinder backpressure regulation overflow inserted valve, could overflow back fuel tank through pressurized cylinder backpressure regulation overflow inserted valve, reach control pressurized cylinder rod chamber back pressure with this, and then reach the effect of control injection pressure.
The supercharging Starting mode comprises injection oil cylinder back cavity pressure feedback or injection oil cylinder Displacement Feedback.
Also be provided with the injection displacement detection system on the described injection oil cylinder cylinder barrel, this injection displacement detection system adopts gear rotational speed register or magnetic railings ruler.
Also connecting one on the described pressurizing cylinder is directly connected in charged piston and is exposed to the chromium plating pole that pressurizing cylinder is used for observing the supercharging stroke outward.
Described vertical pressure charging press-shoot system adopts C type frame to be connected with the clamping of die casting machine.
Vertical pressurizing cylinder and check valve are the basic characteristics of vertical pressure charging press-shoot system, and the injection system action is carried out by Hydraulic Elements, PLC control, and Hydraulic Elements comprise fuel tap, oil cylinder, accumulator etc.After PLC or industrial computer received feedback signal, pressure charging valve was opened, pressurizing cylinder work, and cavity pressure increases sharply behind the injection oil cylinder, and closed check valve is finished function of increasing pressure simultaneously.
Beneficial effect of the present invention is embodied in: this system is furnished with the injection system of vertical pressurized cylinder, adopt C shape frame to connect, be equipped with big capacity piston accumulator, big latus rectum proportional flow control valve, big-flow high-pressure closes check valve soon, makes the injection system key parameter far above the mechanical industry standard JB/T8084.2-2000 of People's Republic of China (PRC) requirement.The standard-required clamp force is greater than 16000TON (16000kN) die casting machine, and maximum empty injection speed 〉=4m/s builds pressure time≤40ms, adopts die casting machine of the present invention then can reach maximum empty injection speed 〉=9m/s, builds pressure time≤18ms.Introduce high energy simultaneously and fill the type technology, promptly when fast shot does not also finish, open supercharging in advance, improve the quality of filling type energy and then raising die-cast product of molten metal.The pressurized cylinder stroke is longer in the vertical pressurized construction, is 2 times of domestic horizontal supercharging mode, and the visible chromium plating pole of the external naked eyes of charged piston can be observed the pressurized cylinder motion conditions very intuitively, is particularly conducive to user's high energy and fills the type process debugging.This system has fast shot and the supercharging runner is big and short, and injection speed is fast, builds pressure time weak point, and supercharging stroke length can realize that high energy fills advantages such as type.
Description of drawings
Below in conjunction with accompanying drawing technical solution of the present invention is described further:
Fig. 1: horizontal pressure charging press-shoot system assembling schematic diagram.
Fig. 2: horizontal pressure charging press-shoot system hydraulic principle sketch.
Fig. 3: vertical pressure charging press-shoot of the present invention mechanism assembling schematic diagram.
Fig. 4: vertical pressure charging press-shoot system hydraulic principle sketch among Fig. 3.
Fig. 5: vertical pressure charging press-shoot system hydraulic pressure design drawing among Fig. 3.
Fig. 6: big latus rectum check valve schematic diagram among Fig. 3.
Wherein:
1: top clamping plate; 2: pull bar; 3: injection portion dress fixed head; 4: the injection punch head assembly; 5: the injection displacement detection system; 6: arrange assembly soon; 7: shot piston; 8: the injection oil cylinder cylinder barrel; 9: hole dish 10: floating piston; 11: the charged piston bar; 12: charged piston; 13: plate in the oil circuit; 14: the oil circuit tailgate; 15: the oil circuit upper plate; 16: two-speed accumulator assembly; 17: supercharging accumulator assembly; 18: support; 19: the injection oil circuit board; 20: check valve; 201: nonreturn valve core; 202: unidirectional valve seat; 203: spring socket sleeve; 204:O type circle 205: back of the body ring; 206: stage clip; 207: hexagon socket head cap screw; 21:C type frame; 22: pressurizing cylinder; 23: the chromium plating pole; P: hydraulic oil pipeline; T: return line; V: fuel tap; S: switching value electromagnet; SS: proportional-type electromagnet.
The specific embodiment
The present invention has disclosed a kind of vertical pressure charging press-shoot system, and is the same with prior art, comprises a support that lands 18 and the clamping top clamping plate 1 partly as die casting machine fixed thereon.Have an injection oil cylinder to be horizontally set on the support 18 relative with top clamping plate 1, described injection oil cylinder comprises shot piston 7 and injection oil cylinder cylinder barrel 8.Between the shot piston 7 of injection oil cylinder and top clamping plate 1, connect injection punch head assembly 4, and adopted C type frame 21 to be connected between injection oil cylinder and the top clamping plate 1.Plate 13, oil circuit tailgate 14 in fast row's assembly 6 and the oil circuit have been connected with described injection oil cylinder.Plate 13 is provided with injection oil circuit board 19 in the oil circuit; Oil circuit tailgate 14 is provided with two-speed accumulator assembly 16, and this two-speed accumulator assembly 16 is connected with injection oil cylinder cylinder barrel 8.
Vertically connected pressurizing cylinder 22 with respect to injection oil cylinder, described pressurizing cylinder 22 includes charged piston bar 11 and charged piston 12.Be provided with a check valve 20 in the described oil circuit in the plate 13, its structure as shown in Figure 6, comprise unidirectional valve seat 202, the nonreturn valve core 201 that sets within it and can move to axial, and the spring socket sleeve 203 that relies on hexagon socket head cap screw 207 to fixedly connected with unidirectional valve seat 202, be provided with stage clip 206 between described unidirectional valve seat 202 and the spring socket sleeve 203.Described unidirectional valve seat 202 ground peripheral rings are provided with O type circle 204, are mounted with back of the body ring 205 in it.
Described pressurizing cylinder 22 is between this check valve 20 and shot piston 7.Described pressurizing cylinder 22 can be vertically set on the level of injection oil cylinder or under the level.
Described pressurizing cylinder 22 has connected a supercharging accumulator assembly 17 separately, is connected by oil circuit upper plate 15 between the two.Described pressurizing cylinder 22 rod chamber backpressure regulation functions, the injection pressure adjustment realizes by adjusting pressurizing cylinder 22 rod chamber pressure.The supercharging Starting mode of this preferred embodiment comprises injection oil cylinder back cavity pressure feedback or injection oil cylinder Displacement Feedback.
Also be provided with injection displacement detection system 5 on the described injection oil cylinder cylinder barrel 8, this injection displacement detection system 5 adopts gear rotational speed register or magnetic railings ruler.
Also connecting one on the described pressurizing cylinder 22 is directly connected in charged piston 12 and is exposed to the pressurizing cylinder 22 outer chromium plating poles 23 that are used for observing the supercharging stroke.
The operation principle of this system is illustrated in conjunction with Fig. 4, V1 be tup forward/tup reversing oil circuit simplified painting backward, S1, S2 are its control electromagnet.Oil circuit oil-out work oil enters the rod chamber and the rodless cavity of shot sleeve through check valve V2, V3.Inserted valve V5 and pilot valve V4 constitute shot sleeve rod chamber oil extraction oil circuit, and custom is referred to as fast oil extraction road; Inserted valve V11 and pilot valve V10, V12 constitute shot sleeve rodless cavity oil extraction oil circuit, and custom is referred to as injection chamber off-load oil circuit.Fast oil extraction road is a normally closed oil circuit, and fast oil extraction road was normally closed when promptly its control valve electromagnet S3 must not electricity, and S3 gets electric, and open on fast oil extraction road.Off-load oil circuit in injection chamber is one and often opens oil circuit, and injection chamber off-load oil circuit was often opened when promptly its control valve electromagnet S5 must not electricity, and S5 gets electric, and off-load oil circuit in injection chamber is closed.Design can prevent to cause shot piston reach phenomenon owing to revealing in the fuel tap like this, makes the die casting oil cylinder piston be in all the time at holding state and retreats the extreme position that puts in place (seat in the plane is treated in work), has not only guaranteed safety but also help raising the efficiency.Shot sleeve off-load oil circuit control increases V12 (area ratio is 1: 6 a hydraulic control one-way valve) to be controlled, as long as control oil circuit oil pressure is not less than working connection 1/6, just can realize the control to working connection.Control oil as can be seen from the two-speed accumulator from schematic diagram, be approximately equal to system pressure.When working connection injection cavity pressure is the highest (after the supercharging) generally be system pressure 2-3 doubly.No matter when all the benefit of use V12 is can be that pressurize or off-load are controlled flexibly to injection cavity pressure oil, after particularly unusual anxious stopping appears in die casting machine, the S5 dead electricity of direction valve V10, the V11 inserted valve is opened, the off-load rapidly of injection cavity pressure oil reduces the risk that injection damages operator, mould unusually.
System pressure oil stores up into piston accumulator ACC1[two-speed accumulator through check valve V15, V16], ACC2[supercharging accumulator].V16, V17 are fast, two fast ratio inserted valves, and its effect is to open when needed, and pressure oil among the two-speed accumulator ACC1 is injected shot sleeve back cavity with the flow that controlled segmentation changes through special check valve V13 by technological requirement.Realize that the shot sleeve piston stops such process by slow to extremely slowing down soon again.V18 is a supercharging ratio inserted valve, and its effect is that shot sleeve advances to certain position, and molten metal fills type substantially and finishes in mould, and V18 opens, and pressure oil enters the pressurized cylinder rodless cavity with flow-controllable among the supercharging accumulator ACC2, realizes function of increasing pressure.V14 is a pressurized cylinder rodless cavity off-load control oil circuit, and it is one and often opens oil circuit, promptly only gets electric closing when supercharging, and all the other time dead electricity are opened (dead electricity off-load).V6, V7, V8, V9, ACC3 constitute supercharging back pressure control oil circuit.Its operation principle is: before the injection, S4 gets, system pressure oil is through the decompression of V6 electricity proportional pressure-reducing valve, one the tunnel enters the rising of pressurized cylinder rod chamber promotion charged piston retreats limit (this moment, V14 was in the dead electricity unloading condition) until pressurized cylinder, the ACC3 energy storage is given on another road, the logical all the time V9 pressure-type inserted valve control chamber of ACC3 pressure oil.The ACC3 energy storage puts in place (pressure sensor is equipped with in the ACC3 outlet) when the pressurized cylinder rollback puts in place simultaneously, and injection preparation is finished, the S4 dead electricity.During supercharging, V14 gets electric closing, and accumulator ACC2 pressure oil flows into the pressurized cylinder rodless cavity through V19, and pressurized cylinder descends, and pressurized cylinder rod chamber pressure oil flows into fuel tank through V9, and this moment, V9 made back pressure overflow valve usefulness, and it can regulate the rod chamber oil pressure.The injection pressure adjustment realizes (custom claims backpressure regulation) by adjusting pressurizing cylinder rod chamber pressure.V9 is pressurized cylinder backpressure regulation overflow inserted valve among Fig. 4.Pressurized cylinder rod chamber hydraulic oil must overcome the pressure of the back pressure accumulator ACC3 that links to each other with the V9 inserted valve, could overflow back fuel tank through V9, reaches control pressurized cylinder rod chamber back pressure in proper order, and then reaches the effect of control injection pressure.
Cavity pressure sharply rose after pressurized cylinder started back, shot sleeve, and special check valve V13 closes, and hydraulic oil is back to the two-speed accumulator after the prevention supercharging.Shot sleeve calculation of pressure formula is as follows after the supercharging:
The supercharging packing stage is because of Pi*Ap+Pb* (Ab-Ap)=Pa*Ab
So Pi={Pa*Ab-Pb* (Ab-Ap) }/Ap
Pi shot sleeve back cavity static pressure in the formula, Pa accumulator ACC2 oil pressure, Pb pressurized cylinder rod chamber back pressure (equaling ACC3 energy storage pressure), Ab pressurized cylinder piston area, Ap pressurized cylinder piston rod area.
It more than is the basic principle of vertical pressure charging press-shoot system.Actual production sees that with injection system accompanying drawing 5 done following improvement: tup forward, tup backward, the off-load of pressurized cylinder back cavity is bigger because of the control oil cylinder, actual is to adopt big latus rectum inserted valve to realize.Fast oil extraction road working connection two groups big latus rectum inserted valve V66, V67, its control oil circuit has then been used two groups little latus rectum inserted valve V69, V70 to add a Solenoid ball valve V65 and has been controlled.The V65 latus rectum is less, and effect is injection starting (slow shot) stage, slowly steadily opens fast oil extraction road, prevents oil cylinder starting shake.The V69 latus rectum is bigger, and effect is that injection enters the fast shot stage and opens rapidly, thoroughly eliminates injection oil cylinder rod chamber back pressure, helps the moment speed-raising of fast shot.V70 closes inserted valve rapidly after injection puts in place, realizes accurately location.At the accumulator oil circuit, increased manual off-load (V84, V93), unusual superpressure safety off-load (V85, V94), die casting machine is shut down or abnormal power-down automatic deloading (V86, V96) three kinds of safety prevention measures.At accumulator back pressure control oil circuit, promote that pressurized cylinder retreats and ACC3 energy storage hydraulic oil respectively from different pressure-reducing valves.Promote pressurized cylinder and retreat hydraulic oil from manual pressure-reducing valve V55, during debugging, V55 is low as far as possible, and can just promote pressurized cylinder and retreat and get final product, general 15-20Bar, the good back of debugging locks constant.And ACC3 hydraulic oil according to injection technology, provides the pressure oil of relevant pressure value from electric proportional pressure-reducing valve V56, and it can be chosen at 25-150Bar, sets on touch-screen.She Ji benefit is when satisfying technological requirement (the pressurized cylinder back pressure is adjustable) like this, and the back pressure when reducing the pressurized cylinder startup as far as possible helps shortening supercharging and builds the pressure time.
Allly doing relevant any modification of the present invention or change in that identical invention condition is following, all is to be included in the scope of protection of the invention.
Claims (11)
1. vertical pressure charging press-shoot system, comprise the injection oil cylinder that is horizontally set on the support (18), described injection oil cylinder comprises shot piston (7) and injection oil cylinder cylinder barrel (8), fast row's assembly (6) and oil circuit board (13 have been connected with described injection oil cylinder, 14,15), on oil circuit board, also be provided with two-speed accumulator assembly (16), and this two-speed accumulator assembly (16) is connected with injection oil cylinder cylinder barrel (8), it is characterized in that: vertically connected pressurizing cylinder (22) with respect to injection oil cylinder, described pressurizing cylinder (22) includes charged piston bar (11) and charged piston (12).
2. vertical pressure charging press-shoot system according to claim 1 is characterized in that: be provided with a check valve (20) in the described oil circuit board (13), described pressurizing cylinder (22) is positioned between this check valve (20) and the shot piston (7).
3. vertical pressure charging press-shoot system according to claim 2, it is characterized in that: described check valve (20) comprises unidirectional valve seat (202), the nonreturn valve core that sets within it and can move to axial (201), and the spring socket sleeve (203) of fixedlying connected with unidirectional valve seat (202), be provided with stage clip (206) between described unidirectional valve seat (202) and the spring socket sleeve (203).
4. vertical pressure charging press-shoot system according to claim 3 is characterized in that: described pressurizing cylinder (22) is vertically set on the level of injection oil cylinder or under the level.
5. vertical pressure charging press-shoot system according to claim 4 is characterized in that: connected supercharging accumulator assembly (17) on the described pressurizing cylinder (22).
6. vertical pressure charging press-shoot system according to claim 1, it is characterized in that: the injection pressure adjustment realizes by adjusting pressurizing cylinder rod chamber pressure, pressurized cylinder rod chamber hydraulic oil overcomes the pressure of the back pressure accumulator that links to each other with pressurized cylinder backpressure regulation overflow inserted valve, could overflow back fuel tank through pressurized cylinder backpressure regulation overflow inserted valve, reach control pressurized cylinder rod chamber back pressure with this, and then reach the effect of control injection pressure.
7. vertical pressure charging press-shoot system according to claim 1 is characterized in that: the supercharging Starting mode comprises injection oil cylinder back cavity pressure feedback or injection oil cylinder Displacement Feedback.
8. vertical pressure charging press-shoot system according to claim 1 is characterized in that: also be provided with injection displacement detection system (5) on the described injection oil cylinder cylinder barrel (8).
9. vertical pressure charging press-shoot system according to claim 8 is characterized in that: described injection displacement detection system (5) adopts gear rotational speed register or magnetic railings ruler.
10. vertical pressure charging press-shoot system according to claim 1 is characterized in that: also connect one on the described pressurizing cylinder (22) and be directly connected in charged piston (12) and be exposed to the outer chromium plating pole (23) that is used for observing the supercharging stroke of pressurizing cylinder (22).
11. vertical pressure charging press-shoot system according to claim 1 is characterized in that: described vertical pressure charging press-shoot system adopts C type frame (21) to be connected with the clamping of die casting machine.
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| CN101239373A (en) | 2008-08-13 |
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Effective date of registration: 20100817 Address after: Suzhou City, Jiangsu province 215106 Wuzhong District town (formerly Du Village) High Bridge No. 1 Patentee after: Suzhou Sanji Casting Equipment Co., Ltd. Address before: Suzhou City, Jiangsu province 215106 Wuzhong District town (formerly Du Village) High Bridge No. 1 Patentee before: Suzhou Yite Machinery Co., Ltd. |