CN100500328C - Injection oilchannel device of hot room die casting machine - Google Patents
Injection oilchannel device of hot room die casting machine Download PDFInfo
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- CN100500328C CN100500328C CNB2007100695316A CN200710069531A CN100500328C CN 100500328 C CN100500328 C CN 100500328C CN B2007100695316 A CNB2007100695316 A CN B2007100695316A CN 200710069531 A CN200710069531 A CN 200710069531A CN 100500328 C CN100500328 C CN 100500328C
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Abstract
A shot oil channel device of hot cell die-casting machine is provided, which comprises a shot oil cylinder, a shot component which is composed of a short piston and a shot pole, a slow pressure oil supplying system which is composed of a shot valve and an oil channel, a quick shot oil supply system is composed of a quick shot energy storage, a uni-directional valve, a quick shot oil input valve and a quick shot oil output valve and an oil passage which connects all above components, a hydraulic pressure backhaul system which is composed of a backhaul oil input valve, a backhaul oil output valve and the oil passage, the control device of the quick shot oil input, output valve and the backhaul oil input, output valve are composed of a connection quick shot oil input, output valve, the quick shot oil input, oil output valve, the solenoid valve of the return oil input, output valve and the connection circuit. With adopting cartridge valve, the quick shot reaction speed of the die-casting machine can reach four times of the adopted solenoid valve, which makes the die-casting machine can recycle quickly and improve the work efficiency. When the cartridge valve is close, one end with small valve core cooperates with the truncation taper of the valve sleeve by hydraulic sealing, which can reduce the leakage of pressing oil in the oil passage, the energy consumption is less.
Description
Technical field
The present invention relates to a kind of injection system of hot chamber machine, specifically, be meant the injection oil circuit device of hot chamber machine.
Background technology
Hot chamber machine is a kind of common compression casting equipment, so-called compression casting be meant with molten metal add the pressure of hot chamber machine indoor after, the molten metal injection is gone in the compression mod by pressure and the speed set by injection system, and make it under packing state, be frozen into required die casting.The injection process of hot chamber machine generally is divided into three phases: in the slow shot stage, the speed and the stroke of die casting machine injection bar are less, will press indoor molten metal to push to the cast gate place of compression mod; In the fast shot stage, the speed of injection rod and stroke strengthen, and the resistance that makes molten metal break through the cast gate place enters in the mold cavity and it filled full; Packing stage, the speed and the stroke of injection rod reduce, but the pressure of injection rod is constant, with the molten metal compacting that mold cavity is solidifying, just obtain required die casting after waiting cooling.The injection speed of die casting machine and pressure are very big to the quality influence of die casting, and wherein the fast shot response speed is bigger to its influence.Therefore, by to the design of injection oil circuit and wherein selecting for use of control valve just become particularly important.
In the existing die casting machine, the oil passage control valve of injection system adopts the fuel feeding of solenoid directional control valve realization to injection oil cylinder mostly.The first, this valve must be covered covering amount pressure oil and could begin to flow, so the die casting machine injection response speed is slow, and is especially true concerning fast shot.The second, solenoid directional control valve is to vestibule processing request height, when closing internal leakage big, the waste energy.The 3rd, this magnetic valve is a 3-position 4-way guiding valve, and the opening and closing of all four hydraulic fluid ports take place simultaneously when commutation, are difficult to avoid the impact of pressure oil to valve, the hot chamber machine poor reliability.The 4th, this valve must be determined latus rectum at the maximum stream flow of any one hydraulic fluid port, and the solenoid directional control valve of identical latus rectum is compared with the valve of other structure, a little less than the negotiability.At last, a backhaul of the injection rod of this die casting machine puts in place, and in the backhaul process, the molten metal of nozzle and mould contact portion is not returned in the jet pipe by suck-back fully, and the molten metal water clock is serious.
Summary of the invention
The objective of the invention is:, provide the injection oil circuit device of the fast and hot chamber machine that internal leakage is little of a kind of fast shot response speed at the problem that above-mentioned injection oil piping system exists.
Design of the present invention is: the injection oil circuit device of hot chamber machine, it comprises by injection oil cylinder, is located at the injection assembly that shot piston in it and injection rod are formed, by the slow shot oil supply system that slow shot magnetic valve and oil circuit thereof are formed, it is characterized in that the fast shot oil supply system is made up of fast shot accumulator, check valve, fast shot inlet valve and fast shot delivery valve and the oil circuit that is connected above-mentioned each parts; The hydraulic pressure back haul system is made up of backhaul inlet valve and backhaul delivery valve and oil circuit thereof; The control device of fast shot oil-feed, delivery valve and backhaul oil-feed, delivery valve is made up of the magnetic valve and the connecting circuit thereof that are connected fast shot oil-feed, delivery valve and backhaul oil-feed, delivery valve respectively.
The fast shot oil supply system is as follows with the annexation of each parts of hydraulic pressure back haul system among the present invention: the input of fast shot inlet valve links to each other with the output of fast shot accumulator and check valve, and output links to each other with the rodless cavity of injection oil cylinder; The input of fast shot delivery valve links to each other with the rod chamber of injection oil cylinder, and output links to each other with fuel tank; The input parallel connection of the input of backhaul inlet valve and check valve links to each other with the output of oil pump, and backhaul inlet valve output links to each other with the rod chamber of injection oil cylinder; The input of backhaul delivery valve links to each other with the rodless cavity of injection oil cylinder, and output links to each other with fuel tank.
The valve pocket front end of fast shot oil-feed among the present invention, delivery valve and backhaul oil-feed, delivery valve is a butt conical surface, and butt conical surface minimum diameter place has formed the hydraulic fluid port of above-mentioned each valve.
The valve pocket of fast shot oil-feed among the present invention, delivery valve and backhaul oil-feed, delivery valve is installed in the hydraulic plate of the logical oil of the inside punching.
The spool of fast shot oil-feed among the present invention, delivery valve and backhaul oil-feed, delivery valve is a little piston of the big end of an end, and a big end links to each other with magnetic valve, and a little end diameter is more bigger than the minimum diameter of the butt conical surface.
Fast shot oil-feed among the present invention, delivery valve and backhaul oil-feed, delivery valve adopt inserted valve.
The backhaul of injection rod is divided into one-level backhaul and secondary backhaul among the present invention, after the one-level backhaul, carries out nozzle and mould and throws off action, carries out the secondary backhaul then the injection rod backhaul is put in place.
The invention has the beneficial effects as follows: hot chamber machine executes slow shot action delay certain hour, the commutation of fast shot magnetic valve is opened the fast shot inserted valve, the end one that spool is little leaves the butt conical surface of valve pocket, the pressure oil that is stored in the fast shot accumulator begins to flow, after converging with the pressure oil that enters from check valve, enter injection oil cylinder rodless cavity promotion shot piston through fast shot oil-feed inserted valve rapidly and move downward the action of execution fast shot, the pressure oil in the injection oil cylinder rod chamber is taken advantage of a situation through the fuel-displaced inserted valve of fast shot and is entered fuel tank.The fast shot response speed of die casting machine can reach four times that adopt solenoid directional control valve behind the employing inserted valve, and hot chamber machine can be circulated quickly, enhances productivity.The spool of inserted valve is a little piston of the big end of an end, and a big end outer circumference surface cooperates with the cylindrical form interior surface liquid sealing of valve pocket, stops pressure oil toward external leakage; A little end diameter is more bigger than the minimum diameter of the butt conical surface, and when inserted valve was closed, a little end cooperated with butt conical surface liquid sealing, so just can reduce even eliminate pressure oil in the oil circuit internal leakage, and energy dissipation is few.Only need handle when determining the inserted valve latus rectum by the required flow of this hydraulic fluid port respectively, the inserted valve negotiability of same latus rectum is more than the twice of solenoid directional control valve, can realize economy and optimize injection system.The hydraulic fluid port of inserted valve lacks than solenoid directional control valve, and the suffered impact of spool is little than solenoid directional control valve, and the hot chamber machine reliability improves.In addition, the hot chamber machine hydraulic pressure backhaul process with this injection oil circuit device is divided into one-level backhaul and secondary backhaul.After the one-level backhaul, carry out nozzle and mould and throw off action, carry out the secondary backhaul then the injection rod backhaul is put in place.When carrying out the secondary backhaul, nozzle and mould have broken away from, and die casting machine returns the molten metal suck-back of nozzle and mould contact portion in the jet pipe, can effectively avoid the weeping of the molten metal of nozzle and mould contact portion.
Description of drawings
Fig. 1 is the assembly structure figure of hot-chamber die casting machine injection system.
Fig. 2 is a hot chamber machine hydraulic principle schematic diagram.
Generalized section when Fig. 3 is in the backhaul end-state for hot-chamber die casting machine injection system.
Generalized section when Fig. 4 is in the slow shot state for hot-chamber die casting machine injection system.
Generalized section when Fig. 5 is in the fast shot state for hot-chamber die casting machine injection system.
Generalized section when Fig. 6 is in one-level backhaul state for hot-chamber die casting machine injection system.
The specific embodiment
As Fig. 1, shown in Figure 3, the injection assembly of hot chamber machine comprises injection oil cylinder 13, is positioned at its shot piston 24 and injection rod 29.The slow shot oil supply system is made of slow shot magnetic valve 16 and oil circuit thereof.The oil-in of slow shot magnetic valve 16 inputs links to each other with oil pump by passage 28, and its oil-out links to each other with the rodless cavity of injection oil cylinder 13 by passage 14; The oil-in of slow shot magnetic valve 16 outputs links to each other with the rod chamber of injection oil cylinder 13 by passage 15, and its oil-out links to each other with fuel tank 25 by passage 38.Fast shot accumulator 1, check valve 7, fast shot inlet valve 5 and fast shot delivery valve 11 and the oil circuit composition fast shot oil supply system that is connected above-mentioned each parts.There is a piston 3 that matches with it that fast shot accumulator 1 is divided into upper and lower chamber in the fast shot accumulator 1, be filled with nitrogen in the upper chamber 2, fast shot accumulator 1 I/O that lower chambers 4 bottom openings form links to each other with the input of fast shot inlet valve 5 and the output of check valve 7 by passage 30, certainly 3 pairs of upper chamber 2 of accumulator piston are hermetic seals, are liquid sealings to lower chambers 4.The input of check valve 7 links to each other with the output of oil pump by passage 34, and the output of check valve 7 links to each other with the input of fast shot accumulator 1 with fast shot inlet valve 5 by passage 6.Pressure oil in the fast shot accumulator 1 is in case reduce when being the oil pressure reduction, oil pump carries the pressure oil of coming to add to the lower chambers 4 of fast shot accumulator 1 immediately by check valve 7, but the pressure oil in the lower chambers 4 can not flow out by check valve 7, this check valve 7 plays the effect that prevents that pressure oil from refluxing, and energy is stored.The input of fast shot inlet valve 5 links to each other with the output of fast shot accumulator 1 with check valve 7 by passage 6, and output links to each other with the rodless cavity of injection oil cylinder 13 by passage 26.The input of fast shot delivery valve 11 links to each other with the rod chamber of injection oil cylinder 13 by passage 44, and output links to each other with fuel tank 25 by passage 43.The injection back haul system is made up of backhaul inlet valve 8 and backhaul delivery valve 9 and oil circuit thereof.The input of backhaul inlet valve 8 links to each other with the output of oil pump by passage 45, and output links to each other with the rod chamber of injection oil cylinder 13 by passage 42.The input of backhaul delivery valve 9 links to each other with the rodless cavity of injection oil cylinder 13 by passage 39, and output links to each other with fuel tank 25 by passage 40.
The valve pocket of above-mentioned fast shot oil-feed, delivery valve 5,11 and backhaul oil-feed, delivery valve 8,9 can be installed in the hydraulic plate of the logical oil of the inside punching, or the inside is connected with in the casing of oil pipe the hydraulic plate 20 of the logical oil of preferred the inside punching here.In hydraulic plate 20, valve pocket 31 front ends of fast shot inlet valve 5 have the individual butt conical surface 32, the butt conical surface 32 minimum diameter places form the input hydraulic fluid port of fast shot inlet valve 5, and the cylindrical form interior surface bottom opening of this valve pocket 31 forms the output hydraulic fluid port of fast shot inlet valve 5.The spool 36 that is positioned at valve pocket 31 is little pistons of the big end of an end, the big small end of this piston is two cylinders that diameter is different, a big end links to each other with magnetic valve 21, and its outer circumference surface cooperates with the cylindrical form interior surface liquid sealing of valve pocket 31, stops pressure oil toward external leakage; A little end diameter is more bigger than the minimum diameter of the butt conical surface 32, and when fast shot inlet valve 5 cut out, a little end cooperated with the butt conical surface 32 liquid sealings, so just can reduce even eliminate pressure oil in the oil circuit internal leakage, and energy dissipation is few.Fast shot delivery valve 11 and backhaul oil-feed, delivery valve 8,9 are identical with above-mentioned fast shot inlet valve 5 structures, and just asphalt channel that connects with each valve I/O and the magnetic valve that is connected with spool are different.The spool of fast shot oil-feed, delivery valve 5,11 links to each other with fast shot magnetic valve 21, and the spool of backhaul oil-feed, delivery valve 8,9 links to each other with backhaul magnetic valve 22.In the fast shot process, slow shot magnetic valve 16 cuts out with backhaul oil-feed, delivery valve 8,9, in the moment that fast shot oil-feed, delivery valve 5,11 are opened, be that the little end one of spool leaves the butt conical surface 32, the pressure oil that is stored in the fast shot accumulator 1 begins to flow, after converging with the pressure oil that enters from check valve 7, the rodless cavity that rapid process fast shot inlet valve 5 enters injection oil cylinder 13 promotes shot piston 24 and moves downward the action of execution fast shot, and the interior pressure oil process fast shot delivery valve 11 of injection oil cylinder 13 rod chambers is taken advantage of a situation and entered fuel tank 25.Such die casting machine fast shot response speed circulates die casting machine than fast four times that adopt solenoid directional control valve quickly, enhances productivity.
Introduce the operation principle process of the injection oil circuit device of hot chamber machine below:
As Fig. 2, shown in Figure 4, hot-chamber die casting machine injection system is in the slow shot state, and fast shot oil-feed, delivery valve 5,11 and backhaul oil-feed, delivery valve 8,9 are closed, and open slow shot magnetic valve 16.The rodless cavity promotion shot piston 24 that the input of pressure oil process slow shot magnetic valve 16 enters injection oil cylinder 13 moves downward, and the distance that injection rod 29 moves is slow shot stroke S
1Pressure oil in injection oil cylinder 13 rod chambers drains into fuel tank 25 through the output of slow shot magnetic valve 16.In the slow shot stage, the speed and the stroke of die casting machine injection bar are less, will press indoor molten metal to push to the cast gate place of compression mod.
As Fig. 2, shown in Figure 5, hot-chamber die casting machine injection system is in the fast shot state, backhaul oil-feed, delivery valve 8,9 keep closing, close slow shot magnetic valve 16 back time-delays 0.3 second (time can be provided with on the die casting machine touch-screen as required voluntarily), 21 commutations of fast shot magnetic valve are opened fast shot oil-feed, delivery valve 5,11.Pressure oil flows out from fast shot accumulator 1, and after converging with the pressure oil that enters from check valve 7, the rodless cavity promotion shot piston 24 that enters injection oil cylinder 13 through fast shot inlet valve 5 moves downward once more, and the distance that injection rod 29 moves is fast shot stroke S
2Pressure oil in injection oil cylinder 13 rod chambers drains into fuel tank 25 through fast shot delivery valve 11.In the fast shot stage, the speed of injection rod and stroke strengthen, and the resistance that makes molten metal break through the cast gate place enters in the mold cavity and it filled full.
Time-delay 0.2 second (time can be provided with on the die casting machine touch-screen as required voluntarily) was so-called packing stage after fast shot was finished, this moment, the speed and the stroke of injection rod 29 were very little, can ignore, but the pressure of injection rod 29 is constant, molten metal compacting with mold cavity is solidifying just obtains required die casting after the cooling.Coming out through the hot chamber machine die casting with above-mentioned injection oil circuit device, die casting compactness is good, tensile strength is high, yield rate is high.
Shown in Fig. 2,3 and 6, the backhaul of hot chamber machine hydraulic pressure is divided into one-level backhaul and secondary backhaul.In the one-level backhaul process, fast shot oil-feed, delivery valve 5,11 and slow shot magnetic valve 16 are closed, and backhaul magnetic valve 22 commutation makes backhaul oil-feed, delivery valve 8,9 open and delayed time 0.2～0.4 second.Be divided into two-way from the defeated pressure oil of coming of oil pump, one tunnel lower chambers 4 that adds to accumulator 1 through check valve 7 reaches the energy value of setting up to accumulator 1, up move through the rod chamber promotion shot piston 24 that backhaul inlet valve 8 enters injection oil cylinder 13 in another road, the distance of these one-level backhaul injection rod 29 backhauls is S
3After the one-level backhaul finished, temporary close backhaul oil-feed, delivery valve 8,9 were carried out nozzle and mould and are thrown off action.In the secondary backhaul process, fast shot oil-feed, delivery valve 5,11 and slow shot magnetic valve 16 keep closing, and 22 commutations of backhaul magnetic valve are opened backhaul oil-feed, delivery valve 8,9 once more, put in place until injection rod 29 backhauls.When carrying out the secondary backhaul, nozzle and mould have broken away from, and die casting machine returns the molten metal suck-back of nozzle and mould contact portion in the jet pipe, can effectively avoid the weeping of the molten metal of nozzle and mould contact portion.In the whole hydraulic pressure backhaul process, the pressure oil in injection oil cylinder 13 rodless cavities is expelled to fuel tank 25 through backhaul delivery valve 9.
Fast shot oil-feed of the present invention, delivery valve 5,11 and backhaul oil-feed, delivery valve 8,9 preferred inserted valves.
Claims (6)
1, a kind of injection oil circuit device of hot chamber machine, it comprises by injection oil cylinder (13), is located at the injection assembly that shot piston (24) in it and injection rod (29) are formed, by the slow shot oil supply system that slow shot magnetic valve (16) and oil circuit thereof are formed, it is characterized in that the fast shot oil supply system is made up of fast shot accumulator (1), check valve (7), fast shot inlet valve (5) and fast shot delivery valve (11) and the oil circuit that is connected above-mentioned each parts; The hydraulic pressure back haul system is made up of backhaul inlet valve (8) and backhaul delivery valve (9) and oil circuit thereof; The control device of fast shot oil-feed, delivery valve (5,11) and backhaul oil-feed, delivery valve (8,9) is made up of the magnetic valve and the connecting circuit thereof that are connected fast shot oil-feed, delivery valve (5,11) and backhaul oil-feed, delivery valve (8,9) respectively; The input of fast shot inlet valve (5) links to each other with the output of fast shot accumulator (1) with check valve (7), and output links to each other with the rodless cavity of injection oil cylinder (13); The input of fast shot delivery valve (11) links to each other with the rod chamber of injection oil cylinder (13), and output links to each other with fuel tank (25); The input parallel connection of the input of backhaul inlet valve (8) and check valve (7) links to each other with the output of oil pump, and backhaul inlet valve (8) output links to each other with the rod chamber of injection oil cylinder (13); The input of backhaul delivery valve (9) links to each other with the rodless cavity of injection oil cylinder (13), and output links to each other with fuel tank (25).
2, the injection oil circuit device of hot chamber machine according to claim 1, the valve pocket front end that it is characterized in that fast shot oil-feed, delivery valve (5,11) and backhaul oil-feed, delivery valve (8,9) is a butt conical surface (32), and the butt conical surface (32) minimum diameter place has formed the hydraulic fluid port of above-mentioned each valve.
3, the injection oil circuit device of hot chamber machine according to claim 1 is characterized in that the valve pocket of fast shot oil-feed, delivery valve (5,11) and backhaul oil-feed, delivery valve (8,9) is installed in the hydraulic plate (20) of the logical oil of the inside punching.
4, the injection oil circuit device of hot chamber machine according to claim 2, the spool (36) that it is characterized in that fast shot oil-feed, delivery valve (5,11) and backhaul oil-feed, delivery valve (8,9) is a little piston of the big end of an end, a big end links to each other with magnetic valve (21,22), and a little end diameter is more bigger than the minimum diameter of the butt conical surface (32).
5,, it is characterized in that fast shot oil-feed, delivery valve (5,11) and backhaul oil-feed, delivery valve (8,9) adopt inserted valve according to the injection oil circuit device of any one described hot chamber machine in the claim 1～3.
6, the injection oil circuit device of hot chamber machine according to claim 1, the backhaul that it is characterized in that injection rod (29) is divided into one-level backhaul and secondary backhaul, after the one-level backhaul, carry out nozzle and mould and throw off action, carry out the secondary backhaul then injection rod (29) backhaul is put in place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100695316A CN100500328C (en) | 2007-07-10 | 2007-07-10 | Injection oilchannel device of hot room die casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100695316A CN100500328C (en) | 2007-07-10 | 2007-07-10 | Injection oilchannel device of hot room die casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101108412A CN101108412A (en) | 2008-01-23 |
| CN100500328C true CN100500328C (en) | 2009-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100695316A Expired - Fee Related CN100500328C (en) | 2007-07-10 | 2007-07-10 | Injection oilchannel device of hot room die casting machine |
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| CN (1) | CN100500328C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701345B (en) * | 2019-10-10 | 2024-03-15 | 伊之密股份有限公司 | Injection check valve of die casting machine and die casting machine hydraulic system using same |
| CN110918937B (en) * | 2019-11-07 | 2022-03-25 | 宁波力劲科技有限公司 | Hydraulic control system for injection speed of die casting machine and control method thereof |
| CN112524101B (en) * | 2020-11-20 | 2022-02-08 | 深圳领威科技有限公司 | Auxiliary energy storage device |
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| CN101108412A (en) | 2008-01-23 |
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