CN201791943U

CN201791943U - Jam-preventive vacuum die casting stopping system

Info

Publication number: CN201791943U
Application number: CN2010202612724U
Authority: CN
Inventors: 包昌强
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-07-16
Filing date: 2010-07-16
Publication date: 2011-04-13
Anticipated expiration: 2020-07-16
Also published as: WO2012006801A1

Abstract

A jam-preventive vacuum die casting stopping system relates to a die casting mold accessory. Since a gap between a driven valve spool and a driven valve spool hole is small, resistance of the driven valve spool during upward movement is large, a transmission mechanism driving the driven valve spool to move upward is easy to break, and a stop valve is often unable to be closed to result in overflow of liquid metal. The jam-prevention vacuum die casting stopping system is characterized in that a sealing portion is arranged on the upper portion of the driven valve spool, a scraping groove guiding portion is arranged in the middle of the driven valve spool, a linkage portion is arranged on the lower portion of the driven valve spool, a conical portion is arranged between the sealing portion and the guiding portion, the stepped driven valve spool hole above an oil channel of the stop valve includes a large-diameter hole and a small-diameter hole, and the diameter of the large-diameter hole is 0.02-0.15mm larger than that of the small-diameter hole. The driven valve spool hole includes the small-diameter hole and the large-diameter hole, the small-diameter hole is used for matching with the guiding portion of the driven valve spool to prevent entry of the liquid metal, and the large-diameter hole is used for reducing resistance to the driven valve spool in upward movement to avoid breakage of a linkage mechanism, thereby improving working reliability and sensitivity of the stop valve.

Description

Anti-sticking evacuated die-casting process cut-off system

Technical field

The utility model relates to a kind of die casting annex, refers to the evacuated die-casting process cut-off system especially.

Background technology

At present, the die casting molding process: matched moulds, pouring metal melt is gone into mold cavity, pressurize a period of time, cooling curing is shaped, and takes out finished product after the die sinking.In mold filling process, the gas in the die cavity needs in time to get rid of in order to avoid problems such as pore, misrun occur, and vacuum exhaust is the effective means that addresses this problem.In the die casting incipient stage, vaccum stop valve is bled, and gas is extracted out through exhaust duct, bleeds in case finish, and exhaust duct is in time closed in the spool action, and this moment, liquid metal can't be outside exhaust duct be spilled over to valve.In press casting procedure, pressure is higher, because spool and valve body are matched in clearance, liquid metal easily enters both gap locations, liquid metal forms harder metal overlap after cooling, overlap is constantly accumulated in the gap that is stuck between spool and the valve body, makes in the spool moving process and produces abrasive wear, causes valve body or spool to damage.On the other hand, after card had overlap in the gap of spool and valve body, spool action was insensitive, in case that exhaust duct is closed is untimely, liquid metal overflows into vacuum suction device outward will make it scrap.For addressing the above problem; I have applied for " vacuum die casting stop valve " patent; on spool, establish annular slot scraping to scrape the overlap that in press casting procedure, produces and to be contained in the slot scraping; offer simultaneously the stop valve oil duct through spool in valve body, in the valve core movement process, annular slot scraping communicates with the stop valve oil duct; thereby overlap is discharged cannelure by the fluid that flows; avoid the overlap accumulation to be sandwiched in the gap, protection spool and valve body prevent that both from pulling because of overlap.But the residue that is positioned at driven spool slot scraping top is difficult to remove, because the gap between driven spool and the driven spool bore is little, it is bigger to move past in the journey resistance on driven spool, drives the transmission mechanism frangibility of moving on the driven spool, causes closing stop valve and makes liquid metal excessive.

The utility model content

The technical assignment of the technical problems to be solved in the utility model and proposition is that the prior art scheme is improved and improved, and a kind of anti-sticking evacuated die-casting process cut-off system is provided, and reduces friction to reach, and improves the purpose of the sensitivity of spool action.For this reason, the utility model is taked following technical scheme:

Anti-sticking evacuated die-casting process cut-off system comprises vaccum stop valve, is used to the oil circuit slag cleaning device that extracts the air extractor of stop valve air and be used to remove residue; Described vaccum stop valve comprise the active spool that is provided with slot scraping and interlock with it driven spool, by valve seat, with by the fixing following valve body of valve seat, be positioned at the upper valve body of valve body top down, described valve body down is provided with the spool bore that matches with spool, and spool passes spool bore and can move up and down therein; The faying face of upper valve body and following valve body is provided with exhaust duct, is connected by the pore of being located in the upper valve body between described air extractor and the exhaust duct; Described oil circuit slag cleaning device comprises the stop valve oil duct that also can communicate with slot scraping through spool bore; It is characterized in that: described driven spool top is for inserting the sealing of upper valve body pore, the middle part is the guide part of diameter greater than driven spool sealing, the bottom is the linkage part with active spool interlock, the tapered portion that is connected for conical surface transition between described sealing and the guide part, guide part is provided with described slot scraping; The driven spool bore that is positioned at stop valve oil duct top is a shoulder hole, comprises large diameter hole and is positioned at the concentric small diameter bore of large diameter hole top, and the large diameter hole aperture is greater than small diameter bore 0.02-0.15mm; Before moving on the driven spool, driven spool guide part is positioned at the small diameter bore below, and slot scraping is relative with guiding gutter, and after treating to move on the driven spool, guide part enters small diameter bore, and sealing stretches into the upper valve body pore.The driven spool bore that will be positioned at stop valve oil duct top is divided into small diameter bore and large diameter hole, wherein small diameter bore is used for cooperating with guide part and prevents that molten metal from entering, large diameter hole is used to reduce the resistance that moves on the driven spool, under the prerequisite that guarantees few leakage of oil, select the large diameter hole aperture greater than small diameter bore 0.02-0.15mm, the too big easy oil leakage in guide part and large diameter hole gap, the too little then frictional force in gap is big.In pumping process, in case liquid metals enters stop valve, impact initiatively spool, initiatively spool moves down under the effect of power, and it is up to drive driven spool, driven spool guide part enters the small diameter bore from large diameter hole, until driven spool sealing shutoff upper valve body pore, the gap of large diameter hole and driven spool guide part is big, and friction is little, before guide part enters small diameter bore, just accumulated sizable kinetic energy, made spool can enter small diameter bore reliably and in time close valve; And because of driven spool rising resistance is little, also frangibility not of the interlinked mechanism between spool and the driven spool initiatively, functional reliability, the sensitivity of raising stop valve; Tapered portion also has the effect of guiding except that conveniently stripped, make guide part successfully rise to small diameter bore from large diameter hole.

As the further of technique scheme improved and replenish, the utility model also comprises following additional technical feature:

Initiatively spool top is guide part, the bottom is a linkage part, described guide part be opened in spool initiatively move down back and slot scraping that the stop valve oil duct communicates form appear on the stage terrace and and the relative leave from office terrace of terrace of appearing on the stage, the height of annular slot scraping greater than the terrace of appearing on the stage to the distance of spool end face initiatively, initiatively spool move up and down distance less than active spool end face to leave office between the terrace distance and greater than the distance between the supreme step surface of active spool end face.Liquid metal enters stop valve, initiatively spool moves down, after treating metal freezing, all be stained with residue at the guide part above the slot scraping and with the active spool hole wall that matches of guide part above the slot scraping, do not have the gap between the two, for preventing to block mutually, after moving on the active spool, initiatively the residue bond regions of spool bore is arranged in slot scraping, to reduce the initial frictional force in the decline process of spool initiatively, increases the initiatively sensitivity of spool.The length of displacement need be taken all factors into consideration the problems such as interference of sensitivity and internal structure, initiatively the spool slot scraping is appeared on the stage terrace and spool bore bond regions top edge apart from too small, or the step place in driven spool guide part top edge and spool bore distance too small (be spool does not have card displacement too small), the kinetic energy of accumulation is few, driven spool action is insensitive, influences closing of driven spool.

Initiatively be provided with the portion of ending that can offset with following valve body in the middle of the spool to move in the continuation that stops the active spool, initiatively the spool bottom surface is provided with moving plate, described moving plate and be provided with support spring between the valve seat, moving plate upper surface is provided with the complex root push rod, described push rod evagination is in following valve body upper surface, in upper and lower valve body matched moulds process, the lower surface penetrator ram of upper valve body is to equal with following valve body upper surface, descending thereupon with the moving plate that the push rod lower end compresses, moving plate move down distance for the movable distance of spool initiatively be before the matched moulds push rod evagination in the height of valve body surface down.Moving plate is depressed in the matched moulds process, conflict in the bottom of active spool because of there being plate, so initiatively spool to move down the power that overcomes little, make initiatively spool move down and drive the servo valve valve fast and quicken to rise with the shutoff pore, be beneficial to the sensitivity that improves the pass valve.

The oil circuit slag cleaning device also comprise link to each other with stop valve oil duct oil-in go out oil pump, the oil well pump that links to each other with stop valve oil duct oil-out, at stop valve oil duct oil-in and go out first fuel tap between the oil-out of oil pump, second fuel tap between the oil-in of stop valve oil duct oil-in and oil well pump; Wherein the first fuel tap normality is for logical, and the second fuel tap normality is for closing; When oil pumping, first fuel tap cuts out, and goes out oil pump and stops to stop valve oil duct fuel feeding, and second fuel tap is opened, and oil well pump is pumped simultaneously to the oil-in and the oil-out of stop valve oil duct; When fuel feeding, first fuel tap is opened, and goes out oil pump to stop valve oil duct fuel feeding, and second fuel tap cuts out, and cuts off the path of oil well pump and the import of stop valve oil duct, only the oil-out of stop valve oil duct is pumped.Certainly when oil pumping, oil well pump also can only be pumped to the oil-out of stop valve oil duct; Fuel tap is the bi-bit bi-pass reversal valve, for reduced volume can be located in the same fuel tap seat; First fuel tap is used to control the oil-feed of stop valve oil duct, under general situation, the scarfing cinder oil circuit is going out oil body " negative pressure " (less than the atmospheric pressure) pressure that is produced under oil pump and the oil well pump acting in conjunction, greater than the gas pressure intensity of exhaust duct under the state of bleeding, before bleeding and in the pumping process, close this fuel tap, avoid oil constantly to enter the stop valve oil duct; Second fuel tap is opened when first fuel tap cuts out, stop valve oil duct oil-in and oil-out are pumped simultaneously, remove the fluid in the stop valve oil duct, prevent that fluid enters stop valve exhaust duct and die cavity through the gap of spool and valve body in pumping process, and influence the quality of product.

Anti-sticking evacuated die-casting process cut-off system also comprises the gas circuit slag cleaning device that is used for removing the gas circuit residue, the shared air valve seat of described gas circuit slag cleaning device and air extractor, air valve seat is established common air duct, air valve seat makes the head end of common air duct be connected with the upper valve body pore is terminal by a gas-tpe fitting, described common air duct is established first port of export and second port of export, and wherein first port of export is connected with a vacuum tank behind the extraction valve of air extractor and is used for bleeding to the stop valve exhaust duct; Second port of export is connected the scarfing cinder that is used for gas circuit with a gas tank that holds gases at high pressure behind first slag valve of gas circuit slag cleaning device.The gas circuit slag cleaning device of setting up is used for removing the waste residue of air flue, exhaust duct and raffinate etc., guarantees the functional reliability of air extractor; After the die sinking, first slag valve is opened, and jar inner high voltage gas, is discharged the waste residue that falls within gas-tpe fitting, the vaccum stop valve air flue to upper valve body by first slag valve, common air duct, gas-tpe fitting, vaccum stop valve air flue; The shared air valve seat of air extractor and gas circuit slag cleaning device is beneficial to the minimizing equipment volume, and compact conformation is in light weight, is easy to install.

The head end of described air valve seat common air duct is provided with the filter screen container cavity and is used to filter the filter screen that enters the common air duct air to hold, filter screen is divided into chamber to be filtered and filter chamber with the filter screen container cavity, filter chamber links to each other with follow-up common air duct, and described slag cleaning device comprises that also open second slag valve that links to each other with chamber to be filtered is to discharge second slag valve of the impurity in the chamber to be filtered through opening.Second slag valve is used for scarfing cinder, particularly after molten metal solidifies, second slag valve of first slag valve of gas tank mesohigh gas through opening, filter chamber, filter screen, unlatching, with the clear its gas discharge valve base such as waste residue that are trapped on the filter screen, this work is that the stop valve gas circuit scarfing cinder of giving of postorder is prepared, the residue of avoiding falling within on the filter screen is blown into again in the stop valve, adopts two slag valves to carry out omnidistance scarfing cinder to air flue, and scarfing cinder is thorough.

Described filter screen is cylindrical, is filter chamber between its excircle and the filter screen container cavity wall, and filter chamber links to each other with the extraction valve of air extractor and first slag valve of gas circuit slag cleaning device by common air duct; Second slag valve is relative with an end of filter screen, and the other end of filter screen is relative with gas-tpe fitting.Filter screen is tubular, makes things convenient for scarfing cinder, and because of the lateral area of filter screen is big, resistance is little, make bleed, scarfing cinder work fast, effectively carry out.

Described fuel tap, slag valve and extraction valve are controlled by corresponding cylinder, and single-chip microcomputer is controlled the break-make of corresponding valve by cylinder.Realize sequential control, reach the purpose of automated production,, adopt Single-chip Controlling, can better guarantee the quality of product because of the work of die casting cut-off system divides several steps.

Described exhaust duct undulate, it is oblique down with over against the active spool to be located at bleeding point on the upper valve base, the exhaust duct head end make downwards bleeding point and exhaust duct form " V " shape kink be used for strengthening liquid to the downward force of active spool and reduction liquid at the flow velocity of exhaust duct in time to close stop valve.Kink hinders the bottom horizontal flow sheet of molten metal, changes it and flows to, and makes the initiatively end face of spool of high speed molten metal forward impact, reduces the flow velocity of horizontal direction, reaches to the purpose of effective pass valve.

Described stop valve oil duct two ends extend in the valve seat wall and form oil-in and oil-out on valve seats, and the spool hole wall has the annular diversion trench that communicates with the stop valve oil duct; Be provided with pass valve cylinder, close valve lever by valve seat, close the lower end of an end of valve lever near driven spool, an end is near the piston upper end of pass valve cylinder.When die debugging, pass valve cylinder drives on the driven spool by the pass valve lever and moves, and inserts pore, and vaccum stop valve is closed.If the upper valve body of stop valve oil duct and valve seat joint are provided with " O " shape sealing ring.Certainly the inlet of stop valve oil duct and the position of liquid outlet are not limited to this, and two outlets also can be arranged in valve body down, perhaps lay respectively at down in valve body and the valve seat, and the setting of stop valve oil duct is on the concrete structure of valve body and install and fix situation such as position and decide.If annular diversion trench flows liquid in guiding gutter, increase the fluid passage, reduce resistance and increase the fluid scope of flowing through, when flowing through cannelure, fluid can will take away in the lump around the overlap in one week of spool.

Beneficial effect:

Driven spool bore is divided into small diameter bore and large diameter hole, wherein small diameter bore is used for preventing that with driven spool guide part cooperation molten metal from entering, large diameter hole is used to reduce the resistance that moves on the driven spool, before entering small diameter bore, driven spool guide part just accumulated sizable kinetic energy, make driven spool guide part can enter small diameter bore reliably with timely pass valve, avoid interlinked mechanism to fracture simultaneously, improve the functional reliability of stop valve.

Description of drawings

Structural representation when Fig. 1 is the vacuum die casting stop valve unlatching.

Fig. 2 is vacuum die casting stop valve structural representation when closing.

Fig. 3 is the A portion structure for amplifying schematic diagram of Fig. 2.

Fig. 4 is an oil circuit slag cleaning device schematic diagram of the present invention.

Fig. 5 (a) is an oil circuit slag cleaning device structural representation of the present invention.

Fig. 5 (b) is the A-A sectional structure schematic diagram of Fig. 5 (a).

Fig. 5 (c) is the B-B sectional structure schematic diagram of Fig. 5 (a).

Fig. 6 (a) is a gas circuit slag cleaning device structural representation of the present invention.

Fig. 6 (b) is the A-A sectional structure schematic diagram of Fig. 6 (a).

Fig. 7 is a workflow diagram of the present invention.

Among the figure: the 1-stop valve, the 101-slot scraping, 102-is spool initiatively, the driven spool of 103-, 104-is by valve seat, valve body under the 105-, the 106-upper valve body, 107-spring, 108-exhaust duct, the 109-pore, the driven spool sealing of 110-, the driven spool guide part of 111-, the driven spool linkage part of 112-, the driven spool tapered portion of 113-, the driven spool bore of 114-, 115-large diameter hole, the 116-small diameter bore, 117-is the spool guide part initiatively, and 118-is the spool linkage part initiatively, the 119-terrace of appearing on the stage, 120 leave from office terraces, 121-ends portion, and 122-moves plate, and 123-closes valve lever, 124-closes the valve cylinder, 2-oil circuit slag cleaning device, 201-stop valve oil duct, 202-stop valve oil-in, 203-stop valve oil-out, 204-fuel tap seat, 205-first fuel tap, 206-second fuel tap, 207-goes out oil pump, the 208-oil well pump, 209-fuel tap oil duct, the 3-air extractor, 301-air valve seat, 302-filter screen, the 303-filter chamber, the 304-common air duct, 305-extraction valve, 4-gas circuit slag cleaning device, the 401-gas tank, 402-first slag valve, 403-second slag valve, 5-gas-tpe fitting.

The specific embodiment

Below in conjunction with Figure of description the technical solution of the utility model is described in further detail.

As shown in Figure 1, 2, 3, vaccum stop valve 1 comprise the active spool 102 that is provided with slot scraping 101 and the driven spool 103 that links with it by leverage, by valve seat 104, with by the fixing following valve body 105 of valve seat 104, be positioned at the upper valve body 106 of valve body 105 tops down, be provided with the spool bore that matches with spool in the following valve body 105, spool passes spool bore and can move up and down therein; Valve body is provided with exhaust duct 108 with the faying face of following valve body 105, exhaust duct 108 undulates, it is oblique down with over against active spool 102 to be located at the bleeding point of upper valve body 106, exhaust duct 108 head ends make bleeding point and exhaust duct 108 form " V " shape kinks downwards, strengthen liquid to the downward force of active spool 102 and reduce the flow velocity of liquid in exhaust duct 108 in time to close stop valve 1.Be connected by the pore of being located in the upper valve body 106 109 between air extractor 3 and the exhaust duct 108.Oil circuit slag cleaning device 2 comprises the stop valve oil duct 201 that also can communicate with slot scraping 101 through spool bore; Stop valve oil duct 201 two ends extend in valve seat 104 walls and form oil-in 202 and oil-out 203 on valve seats, and the spool hole wall has the annular diversion trench that communicates with stop valve oil duct 201.Driven spool 103 tops are for inserting the sealing 110 of upper valve body pore 109, the middle part is the guide part 111 of diameter greater than driven spool sealing 110, the bottom is the linkage part 112 with active spool 102 interlocks, the tapered portion 113 that is connected for conical surface transition between sealing 110 and the guide part 111, guide part 111 is provided with slot scraping 101; The driven spool bore 114 that is positioned at stop valve oil duct 201 tops is shoulder hole, comprises large diameter hole 115 and is positioned at the concentric small diameter bore 116 of large diameter hole 115 tops, and large diameter hole 115 apertures are greater than small diameter bore 0.02-0.15mm; Before moving on the driven spool 103, driven spool 103 guide parts 111 are positioned at 116 times positions of large diameter hole, and slot scraping 101 is relative with guiding gutter, and after treating to move on the driven spool 103, guide part 111 enters small diameter bore 116, and sealing 110 stretches into upper valve body 106 pores 109.Initiatively spool 102 tops are guide part 117, the bottom is a linkage part 118, guide part 117 is offered annular slot scraping 101 and is formed appear on the stage terrace 119 and the leave from office terrace 120 relative with the terrace 119 of appearing on the stage, the height of annular slot scraping 101 is greater than the distance of terrace 119 to active spool 102 end faces of appearing on the stage, initiatively spool 102 move up and down distance less than active spool 102 end faces to leave office between the terrace 120 distance and greater than the distance between the supreme step surface 119 of active spool 102 end faces, before initiatively spool moves down, the second step face is positioned at the top of guiding gutter, after treating that initiatively spool moves down, slot scraping communicates with guiding gutter.Initiatively be provided with the portion 121 of ending that can offset with following valve body 105 in the middle of the spool 102 to move distance on the restriction active spool 102, initiatively spool 102 bottom surfaces are provided with moving plate 122, move plate 122 and be provided with support spring 107 by between the valve seat 104, moving plate 122 upper surfaces are provided with the complex root push rod, the jogger hole of valve body 105 and evagination were in following valve body 105 upper surfaces under push rod inserted, when last, behind following valve body 105 matched moulds, the lower surface penetrator ram of upper valve body 106 is to equal with following valve body 105 upper surfaces, the push rod lower end is pressed on the moving plate 122, the elastic force that makes plate 122 overcome support spring 107 moves down, the distance that moves down of moving plate 122 is the distance of push rod evagination before the matched moulds in following valve body 105 surfaces, and this distance also is the movable distance of active spool 102.

Fluid is inhaled into die cavity from the gap location of stop valve spool and following valve body when preventing to bleed, and influences stop valve function and product quality, increases by two fuel taps at the stop valve oil duct, can pump to two hydraulic fluid ports of stop valve simultaneously, and edible vegetable oil is clean.As shown in Figure 4, the present invention is at stop valve oil duct oil-in 202 and go out to establish first fuel tap 205 between oil pump 207 oil-outs, establishes second fuel tap 206 between stop valve oil duct oil-in 202 and oil well pump 208 oil-ins; First fuel tap, 205 second fuel taps 206 are the bi-bit bi-pass reversal valve, and first fuel tap, 205 normalities are for logical, and second fuel tap, 206 normalities are for closing.As Fig. 5 (a), 5(b), 5(c) shown in, first fuel tap 205, second fuel tap 206 are positioned at same fuel tap seat 204, establish continuous fuel tap oil duct 209 between two valves, this fuel tap oil duct 209 links to each other with stop valve oil duct 201 oil-ins 202, and first fuel tap 205 and second fuel tap 206 adopt the piston type fuel tap, and piston rod is connected with cylinder, the C mouth connects oil well pump 208, the D mouth connects the oil-out 203 of stop valve oil duct 201, and the E mouth picks out oil pump 207, and the F mouth connects stop valve oil duct oil-in 202.When second fuel tap, 206 descent of pistons, fuel tap oil duct 209 is communicated with oil well pump 208 oil-ins; First fuel tap, 205 piston stroking upwards cut off stop valve oil duct oil-in 202 and go out oil pump 207, stop oil-feed.

For removing the waste residue in air flue, the die cavity, guarantee product quality, set up the gas circuit slag cleaning device.As Fig. 6 (a), 6(b) shown in, gas circuit slag cleaning device 4 and air extractor 3 shared air valve seat 301, air valve seat 301 is established common air duct 304, air valve seat 301 makes the head end and 109 terminal connections of upper valve body pore of common air duct 304 by a gas-tpe fitting 5, common air duct 304 is established first port of export, second port of export, and wherein first port of export is connected with a vacuum tank behind the air bleeding valve of air extractor 3 and is used for bleeding to stop valve exhaust duct 108; Second port of export is connected the scarfing cinder that is used for gas circuit with a gas tank 401 that holds gases at high pressure behind first slag valve 402 of gas circuit slag cleaning device 4.The head end of air valve seat 301 common air duct 304 is provided with the filter screen container cavity and is used to filter the filter screen 302 that enters common air duct 304 air to hold, filter screen 302 is divided into chamber to be filtered and filter chamber 303 with filter screen 302 container cavities, filter chamber 303 links to each other with follow-up common air duct 304, gas circuit slag cleaning device 4 comprises that also open second slag valve 403 that links to each other with chamber to be filtered is to discharge second slag valve 403 of the impurity in the chamber to be filtered through opening, first slag valve 402, second slag valve 403 and extraction valve 305 are by corresponding cylinder control, and single-chip microcomputer is controlled the break-make of corresponding valve by cylinder.Filter screen 302 is cylindrical, is filter chamber 303 between its excircle and the filter screen 302 container cavity walls, and filter chamber 303 links to each other with the extraction valve 305 of air extractor 3 and first slag valve 402 of slag cleaning device by common air duct 304; Second slag valve 403 is relative with an end of filter screen 302, and the other end of filter screen 302 is relative with gas-tpe fitting 5, adopts two scarfing cinders, and air flue is carried out omnidistance scarfing cinder, and scarfing cinder is thorough.

Shown in Figure 7, evacuated die-casting process cut-off system job step:

1) oil pumping step, as Fig. 5 (a), 5(b), 5(c) shown in, single-chip microcomputer is controlled by cylinder on the piston of first fuel tap 205 and is moved, and closes first fuel tap 205, cut off stop valve oil duct oil-in 202 and the oil-out that goes out oil pump 207, no longer oil-feed of stop valve oil duct 201; The piston of Single-chip Controlling second fuel tap 206 moves down, open second fuel tap 206, the oil-in of stop valve oil duct oil-in 202 and oil well pump 208 is communicated with, the oil-in 202 and the oil-out 203 of 208 pairs of stop valve oil ducts 201 of oil well pump are pumped simultaneously, and the time of oil pumping beginning is before the matched moulds or behind the matched moulds;

2) pump step, injection plunger pushes seals material pipe beginning mold filling, as Fig. 6 (a), 6(b) shown in, single-chip microcomputer moves to left by the piston of cylinder control extraction valve 305, and extraction valve 305 is opened, and vacuum tank is communicated with stop valve 1 air flue, institute's body of bleeding is through gas-tpe fitting 5, filter screen 302, filter chamber 303, extraction valve 305, finally enter vacuum tank, the waste residue that is sucked is filtered by filter screen 302, and the gas in the exhaust duct 108 is extracted out to form vacuum; On injection plunger, establish delegation's program switch, after injection plunger pushes envelope position material pipe, travel switch passes to single-chip microcomputer with signal, single-chip microcomputer can be with this moment point as reference point, time reference as subsequent step, certainly also can on mould, establish corresponding travel switch, with the time reckoning point of matched moulds time as subsequent step;

3) fuel feeding step treats that molten metal enters vaccum stop valve 1, the spool action, and stop valve pore 109 cuts off with exhaust duct 108, time-delay, Single-chip Controlling extraction valve 305 is closed, and makes vacuum tank and shared air flue 304 every the road, and air extractor 3 stops to bleed.At this moment, Single-chip Controlling first fuel tap 205 is opened and is stop valve oil duct 201 fuel feeding, and second fuel tap 206 cuts out, and stops 202 oil pumping of 208 pairs of stop valve oil ducts of oil well pump oil-in, only to 203 oil pumping of stop valve oil duct oil-out;

4) step of scarfing cinder for the first time, treat that the mould inner metal liquid solidifies, the Single-chip Controlling cylinder drives on the piston of second slag valve 403 and moves, second slag valve 403 is opened, filter screen 302 1 ends communicate with the external world, delayed time 0.5 second, after second slag valve 403 is opened fully, first slag valve 402 is opened under the control of single-chip microcomputer, gases at high pressure pass through first slag valve 402, filter chamber 303, filter screen 302, second slag valve 403 successively to the chamber, and the waste residue that reaches on the common air duct head end that falls within on the filter screen 302 is discharged; Discharge gases at high pressure, get rid of the waste residue of bringing air flue when air extractor 3 is bled into, delay time 0.5-1 second, first slag valve 402 is closed, and second slag valve 403 is closed;

5) step of scarfing cinder for the second time, after the die sinking, first slag valve 402 is opened again, gases at high pressure to upper valve body 106, will fall within gas-tpe fitting 5 by first slag valve 402, filter chamber 303, filter screen 302, gas-tpe fitting 5, connection tracheae, vaccum stop valve 1 air flue, connect the waste residue discharge in tracheae, vaccum stop valve 1 gas circuit.Delay time 0.5-1 second, two scarfing cinders are adopted in the scarfing cinder power cut-off, and air flue is carried out omnidistance scarfing cinder, and scarfing cinder is thorough.

When die debugging, close valve cylinder 124 and drive on driven spool 103 tops by closing valve lever 123, insert pore 109, vaccum stop valve is closed.

Anti-sticking evacuated die-casting process cut-off system shown in above Fig. 1-7 is a specific embodiment of the utility model; the utility model substantive distinguishing features and progress have been embodied; can be according to the use needs of reality; under enlightenment of the present utility model; it is carried out the equivalent modifications of aspects such as shape, structure, all at the row of the protection domain of this programme.

Claims

1. anti-sticking evacuated die-casting process cut-off system, the oil circuit slag cleaning device (2) that comprises vaccum stop valve (1), is used to extract the air extractor (3) of stop valve (1) air and is used to remove residue; Described vaccum stop valve (1) comprise the active spool (102) that is provided with slot scraping (101) and interlock with it driven spool (103), by valve seat (104), with by the fixing following valve body (105) of valve seat (104), be positioned at the upper valve body (106) of valve body (105) top down, described valve body (105) down is provided with the spool bore that matches with spool, and spool passes spool bore and can move up and down therein; The faying face of upper valve body (106) and following valve body (105) is provided with exhaust duct (108), is connected by the pore of being located in the upper valve body (106) (109) between described air extractor (3) and the exhaust duct (108); Described oil circuit slag cleaning device (2) comprises through spool bore and the stop valve oil duct (201) that can communicate with slot scraping (101), the oil pump (207) that goes out that links to each other with stop valve oil duct oil-in (202) and reaches the oil well pump (208) that links to each other with stop valve oil duct oil-out (203); It is characterized in that: described driven spool (103) top is for can insert the sealing (110) of upper valve body pore (109), the middle part is the guide part (111) of diameter greater than driven spool sealing (110), the bottom is the linkage part (112) with active spool (102) interlock, the tapered portion (113) that is connected for conical surface transition between described sealing (110) and the guide part (111), guide part (111) is provided with described slot scraping (101); The driven spool bore (114) that is positioned at stop valve oil duct (201) top is shoulder hole, comprise large diameter hole (115) and be positioned at the concentric small diameter bore (116) of large diameter hole (115) top, large diameter hole (115) aperture is greater than small diameter bore (116) 0.02-0.15mm; Before moving on the driven spool (103), driven spool (103) guide part (111) is positioned at small diameter bore (116) below, slot scraping (101) is relative with guiding gutter, after treating to move on the driven spool (103), guide part (111) enters small diameter bore (116), and sealing (110) stretches into upper valve body pore (109).

2. anti-sticking evacuated die-casting process cut-off system according to claim 1, it is characterized in that: initiatively spool (102) top is guide part (117), the bottom is linkage part (118), described guide part (117) be opened in spool (102) initiatively move down back and slot scraping (101) that stop valve oil duct (201) communicates form appear on the stage terrace (119) and and the relative leave from office terrace (120) of terrace (119) of appearing on the stage, the height of slot scraping (101) greater than the terrace of appearing on the stage (119) to the distance of spool (102) end face initiatively, initiatively spool (102) move up and down distance less than active spool (102) end face to the distance between the terrace of leaving office (120) and greater than the distance between the supreme step surface of active spool (102) end face (119).

3. anti-sticking evacuated die-casting process cut-off system according to claim 2, it is characterized in that: initiatively be provided with the portion (121) of ending that can offset with following valve body (105) in the middle of the spool (102) to move in the continuation that stops active spool (102), initiatively spool (102) bottom surface is provided with moving plate (122), described moving plate (122) and be provided with support spring (107) between the valve seat (104), moving plate (122) upper surface is provided with the complex root push rod, described push rod evagination is in following valve body (105) upper surface, last, in following valve body (105) the matched moulds process, the lower surface penetrator ram of upper valve body (106) is to equal with following valve body (105) upper surface, descending thereupon with the moving plate (122) that the push rod lower end compresses, moving plate (122) move down distance for the movable distance of spool (102) initiatively be before the matched moulds push rod evagination in the height on valve body (105) surface down.

4. anti-sticking evacuated die-casting process cut-off system according to claim 1 is characterized in that: oil circuit slag cleaning device (2) also comprises first fuel tap (205) between the oil-out that is positioned at stop valve oil duct oil-in (202) and goes out oil pump (207), be positioned at second fuel tap (206) between the oil-in of stop valve oil duct oil-in (202) and oil well pump (208); Wherein first fuel tap (205) normality is for logical, and second fuel tap (206) normality is for closing; When oil pumping, first fuel tap (205) cuts out, go out oil pump (207) and stop to stop valve oil duct (201) fuel feeding, second fuel tap (206) is opened, and oil well pump (208) is pumped simultaneously to the oil-in (202) and the oil-out (203) of stop valve oil duct (201); When fuel feeding, first fuel tap (205) is opened, and goes out oil pump (207) to stop valve oil duct (201) fuel feeding, and second fuel tap (206) cuts out, cut off the path of oil well pump (208) and stop valve oil duct (201) import, only the oil-out (203) of stop valve oil duct (201) is pumped.

5. anti-sticking evacuated die-casting process cut-off system according to claim 4, it is characterized in that: described first fuel tap (205) and second fuel tap (206) are the bi-bit bi-pass reversal valve, described first fuel tap (205) and second fuel tap (206) are by corresponding cylinder control, and single-chip microcomputer is controlled the break-make of corresponding fuel tap by cylinder.

6. anti-sticking evacuated die-casting process cut-off system according to claim 1, it is characterized in that: anti-sticking evacuated die-casting process cut-off system also comprises the gas circuit slag cleaning device (4) that is used for removing the gas circuit residue, described gas circuit slag cleaning device (4) and the shared air valve seat of air extractor (3) (301), air valve seat (301) is established common air duct (304), air valve seat (301) makes the head end of common air duct (304) be connected with upper valve body (106) pore (109) is terminal by a gas-tpe fitting (5), described common air duct (304) is established first port of export and second port of export, and wherein first port of export is connected with a vacuum tank behind the extraction valve (305) of air extractor (3) and is used for bleeding to stop valve exhaust duct (108); Second port of export is connected the scarfing cinder that is used for gas circuit with a gas tank (401) that holds gases at high pressure behind first slag valve (402) of gas circuit slag cleaning device (4).

7. anti-sticking evacuated die-casting process cut-off system according to claim 6, it is characterized in that: the head end of described air valve seat (301) common air duct (304) is provided with the filter screen container cavity and is used for filtering the filter screen (302) that enters common air duct (304) air to hold, filter screen (302) is divided into chamber to be filtered and filter chamber (303) with the filter screen container cavity, filter chamber (303) links to each other with follow-up common air duct (304), described slag cleaning device comprises that also open second slag valve (403) that links to each other with chamber to be filtered is to discharge second slag valve (403) of the impurity in the chamber to be filtered through opening, described first slag valve (402), second slag valve (403) and extraction valve (305) are by corresponding cylinder control, and single-chip microcomputer is controlled the break-make of corresponding valve by cylinder.

8. anti-sticking evacuated die-casting process cut-off system according to claim 7, it is characterized in that: described filter screen (302) is cylindrical, be filter chamber (303) between its periphery and the filter screen container cavity wall, filter chamber (303) links to each other with the extraction valve (305) of air extractor (3) and first slag valve (402) of gas circuit slag cleaning device (4) by common air duct (304); Second slag valve (403) is relative with an end of filter screen (302), and the other end of filter screen (302) is relative with gas-tpe fitting (5).

9. according to the described anti-sticking evacuated die-casting process of the arbitrary claim of claim 1-8 cut-off system, it is characterized in that: described exhaust duct (108) undulate, it is oblique down with over against active spool (102) to be located at bleeding point on the upper valve base, exhaust duct (108) head end make downwards bleeding point and exhaust duct (108) form " V " shape kink be used for strengthening liquid to the downward force of active spool (102) and reduction liquid at the flow velocity of exhaust duct (108) in time to close stop valve (1).

10. anti-sticking evacuated die-casting process cut-off system according to claim 9, it is characterized in that: described stop valve oil duct (201) two ends extend and form oil-in (202) and oil-out (203) in the valve seat wall and on valve seat, and the spool hole wall has the annular diversion trench that communicates with stop valve oil duct (201); Be provided with pass valve cylinder (124), close valve lever (123) by valve seat (104), close the lower end of an end of valve lever (123) near driven spool (103), an end is near the piston upper end of pass valve cylinder (124).