CN1093015C - Casting die with deairing channel and its core gap parameter determining method - Google Patents
Casting die with deairing channel and its core gap parameter determining method Download PDFInfo
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- CN1093015C CN1093015C CN00112494A CN00112494A CN1093015C CN 1093015 C CN1093015 C CN 1093015C CN 00112494 A CN00112494 A CN 00112494A CN 00112494 A CN00112494 A CN 00112494A CN 1093015 C CN1093015 C CN 1093015C
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Abstract
The present invention relates to a die casting mold with a deairing channel and a mold core gap parameter determining method thereof. The present invention is characterized in that a movable mold and a fixed mold are respectively composed of a mold plate and a multi-layer block combined mold core, wherein the multi-layer block combined mold core of the movable mold and the multi-layer block combined mold core of the fixed mold are respectively connected with the mold plate of the movable mold and the mold plate of the fixed mold; each of the multi-layer block combined mold cores is composed of an outer mold core and more than two inner mold cores; each of the mold plates is provided with a deairing ring groove and deairing holes; a deairing gap is between each of the inner mold cores and each of the outer mold cores; the deairing gap is communicated with the deairing hole on the mold plate. The die casting mold is suitable for injection with low specific pressure and low speed so as to prolong the service life of the mold and reduce the requirement for a die casting machine. In addition, the present invention also provides a method for determining the actual gap parameters of the die casting molds by searching the edge points of the corresponding mold gap value of qualified castings through gradual pressure test, which provides a practicable technical approach for the specific application of the die casting molds.
Description
The present invention relates to metal does not have the Machining Technology for Cutting field, especially the die cast metal mould.
A national industrialized level is represented in die casting industry to a certain extent, and a national die casting industry is not done a good job in, and war industry, auto industry, motorcycle industry, electronics industry, light industry just do not have competitiveness in the world.At present, how soon developed country's so-called advanced die casting machine of research of risking one's life boasts own compression casting machine-pressed shoots speed in the world, specific pressure many again high (specific pressures high-speed more fast more die casting is produced just poor more), and this produces the major reason of vicious circle just.In addition, be covered with copper tube above the compression mod that developed country produces, will have forced cooling in process of production.From above 2 as can be seen, there are mistaken ideas in these developed countries in die casting is produced.Secondly in fact, real profoundness also should be design of Die Casting, and the compression mod of designing at first can not be aluminium-plated, and exhaust performance will be got well, and the most important thing is that exhaust performance will get well in these 2, and mould will from all directions can both exhaust in press casting procedure.And cast gate, accumulated slag bag shaped position are not subject matter.The die venting performance is bad, gas row does not come out in press casting procedure, just with the injection of high specific pressure fast speed, mold temperature infinitely raises like this, die cavity inner surface local temperature reaches fusing point, be certain to sticking to mould, and generally people will be attributed to coating quality, be in fact the die venting performance bad due to.Because the not handy high specific pressure fast speed of die venting performance injection, press mould to such an extent that twist around, produce the distortion be full of cracks, it is bad generally to lay the blame on mold materials, improve mold materials in research in the world, and this is not the key point of problem, and good again material also cannot stand the injection of high specific pressure fast speed.For the gas problem of die cavity, past attempts adopts evacuated die-casting process, oxygen blast die casting, and it is all unnecessary to it seems now, as long as the die venting performance is good, problem can all be solved.
The objective of the invention is to propose a kind of compression mod and this mould core exhaust clearance determination method for parameter that has the exhaust passage, thereby effectively eliminate bleb, improve die life, reduce technical requirement die casting machine.
For realizing above purpose, the technical scheme that has the exhaust passage compression mod of the present invention is, the composition of this compression mod comprises dynamic model and quiet mould, dynamic model and quiet mould are made of template and multilayer piece combination mold core respectively, and dynamic model multilayer piece combination mold core is connected with quiet mould template with the dynamic model template respectively with quiet mould multilayer piece combination mold core; Multilayer piece combination mold core is made of single outer core rod and two above inner mould cores; Template is provided with exhaust annular groove and steam vent, and between the inside and outside core rod, have exhaust clearance between the inner mould core, exhaust clearance is connected with the template upper air-vent.
In technique scheme, whether aluminium-plated directly related with the core rod gap length, realize smoothly for guaranteeing this technical scheme, designing mould to note following some:
One, mould die joint, core rod is wanted a little higher than template, and the sound core rod closes sternly behind the mould assembly like this, and is gapped between the sound template, aluminium-plated phenomenon can not take place, and makes the exhaust of easy mould die joint; Usually core rod is than the high 0.2-0.3 millimeter of template, and the sound template will have 0.5 millimeter gap behind the mould assembly.
Two, cast gate is arranged at core rod inside, can not half on the core rod half on template, because under mal-condition, operate for a long time, impossible core rod and template keep at grade, will produce aluminium-platedly like this, will produce a series of adverse consequences, contaminated environment, easily send out injury accident, accelerate mould damage etc.
The compression mod that three, the chute post is arranged, the hole on the slide block is larger than the chute post, and chute post and latch segment can not clash like this, are convenient to slide block locking, thereby aluminium-plated phenomenon can take place.Usually the hole on the slide block is bigger 2 millimeters than chute post.
Four, core rod design is bigger than conventional design, and the pressure that is subjected to of core rod is smaller like this.
For achieving the above object, compression mod gap parameter of the present invention determines that method may further comprise the steps,
A, preparation test mould: at first press the foundry goods shape and prepare test mould, have the plurality of rows pore in the exhaust annular groove of this test mould, the gap that varies in size between different steam vents and the core rod is connected, to notice that especially template is lower than core rod, core rod is smooth, and the sound template will have certain clearance behind the mould assembly;
B, heat run mould, progressively pressure testing seek foundry goods when not aluminium-plated the marginal point in corresponding core rod gap: test mould is heated to the 200-250 degree, with three kinds of drifts of die casting machine, every kind of drift is with the pressure testing three times separately of the fast jogging speed of high specific pressure, when aluminium-plated note observing which gap, when not aluminium-plated which gap is, performs record, to determine not aluminium-plated pairing gap parameter;
The compression mod of C, the above-mentioned not aluminium-plated pairing gap parameter actual design multilayer piece combination mold core of foundation;
D, the heating die casting, progressively pressure testing with determine qualified foundry goods the optimum Working of corresponding die casting machine: die casting is warmed to about the 200-250 degree, die casting machine adopts conventional pressure, the jogging speed injection, observing effect, fine as casting quality, progressively the die casting machine injection supercharging is excised then, continue to use slow shot, observing effect again, if foundry goods still is fine, at this moment just should reduce the oil pump outlet pressure, accumulator also will reduce gas pressure simultaneously, observe always, find the injection supercharging of the qualified and die casting machine of foundry goods, the oil pump outlet pressure, reach the accumulator gas pressure and be minimum optimum value, all absorbed for like this injection power by foundry goods, the reaction force that acts in the core rod drops to minimum point.
Advantage of the present invention is, the understanding mistaken ideas of people in the die casting production technology have been clarified, by suitable exhaust clearance is set on mould, thereby produce under the prerequisite of qualified die-cast product guaranteeing, reduce requirement die casting machine injection power and mold materials, coating etc.In the good die cavity of exhaust performance especially as unresisted passage, the mobile performance of air is than the fast manyfold of aluminum alloy melt in die cavity, at this moment as long as with hanging down the injection of specific pressure jogging speed, just very facility is full of die cavity, will obtain the measured die casting of matter, injection power is all absorbed by die casting, and the back-pressure power of penetrating on the mould can be transferred to minimum point, even is " zero ".And for example with low specific pressure jogging speed injection, air in the die cavity is air bullet king especially in this way, in exhaust process, played the reduction aluminum alloy melt to die cavity inner surface impulsive force, with low specific pressure jogging speed injection, mould just can not produce high temperature, does not just have the sticking to mould problem, and the lubricant temperature also is difficult for raising, machine burden is also little, has relatively also improved machine service life.
Introduce embodiments of the invention below in conjunction with accompanying drawing.
Accompanying drawing 1 is a general foundry goods compression mod structure partial schematic diagram of the present invention.
Accompanying drawing 2 is thin and dark foundry goods compression mod structure partial schematic diagrames of the present invention.
Accompanying drawing 4 is motor vehicle wheel hub casts compression mod design feature schematic diagrames of the present invention.
Accompanying drawing 5 is the dead angle solid casting compression mod structure partial schematic diagrames that have of the present invention.
Accompanying drawing 6 is compression mod gate location schematic diagrames of the present invention.
Embodiment one: be general foundry goods compression mod, its partial structurtes as shown in Figure 1.In the accompanying drawing 1, the 1st, exhaust clearance, the 2nd, multilayer piece combination mold core, the 3rd, steam vent and air discharge duct, the D tolerance fit is (H8/f7)
7, this tolerance fit is in case the gap is monolateral as positioning action.
Embodiment two: be thin dark foundry goods compression mod, its partial structurtes as shown in Figure 2.Among Fig. 2, the 4th, multilayer piece combination mold core, the 5th, steam vent, the 6th, exhaust clearance, 7 is can be for push rod, the D tolerance fit is (H8/f7)
7The H face air drain that can begin to rehearse, according to the large, medium and small branch of mould, L respectively is about 20 millimeters, 30 millimeters, 40 millimeters.Ejector pin of die set should guarantee 0.08 mm clearance.
Embodiment three: be the shell casting compression mod, its partial structurtes as shown in Figure 3.In the accompanying drawing 3, the 8th, multilayer piece combination mold core, the 9th, exhaust clearance, the 10th, steam vent, the D tolerance fit is (H8/f7)
7
Embodiment four: be motor vehicle wheel hub casts compression mod, its partial structurtes as shown in Figure 4.In the accompanying drawing 4, the 11st, multilayer piece combination mold core, the 12nd, logical atmospheric exhaust path.Sky is all cut at sound core rod hub middle part, and periphery stays about 20 millimeter bands, opens some air discharge ducts at the band place then.
Embodiment five: for the real foundry goods compression mod in dead angle is arranged, its partial structurtes as shown in Figure 5.In the accompanying drawing 5, the 13rd, multiple layer combination core rod, the 14th, exhaust clearance, the 15th, steam vent air discharge duct, the 16th, core.Have the place at dead angle not only not have push rod but also do not have mating surface, foundry goods is solid, can consider the number of plies according to the volume size by adding core, accelerates exhaust effect.
Embodiment six: present embodiment provides the compression mod gate location, as shown in Figure 6.In the accompanying drawing 6, the 17th, multiple layer combination core rod, the 18th, cast gate.
In above specific embodiment, all exhaust passages of being made up of the steam vent air discharge duct all must lead to atmosphere.
In die casting design of the present invention, determining of gap parameter is key factor, now provides a method of determining compression mod of the present invention gap under all kinds of conditional parameter by die trial:
At first scrap compression mod and test with a pair, on die joint, the four direction air drain that respectively begins to rehearse, width is about 40 millimeters, and length is 20 millimeters, deeply respectively is 0.08 millimeter; 0.1 millimeter; 0.12 millimeter; 0.14 milli comes, and will notice that especially template is than the low 0.2-0.3 millimeter of core rod.Core rod is smooth, and the sound template will have the gap of 0.5 millimeter behind the mould assembly, and easy to exhaust can be observed exhaust effect simultaneously.Mould is warmed to about the 200-250 degree, the temperature of aluminium exceeds about 40 degree than specified temperature, die casting machine all has three kinds of drifts, every kind of drift is with the pressure testing three times separately of the fast jogging speed of high specific pressure, when aluminium-plated note observing which gap, when not aluminium-plated which gap is, performs record.Then just according to the observation to not aluminium-plated gap parameter design the compression mod of the multilayer piece combination mold core that above embodiment provides.The mould design finishes, again by following procedure operation, at first mould is warmed to about the 200-250 degree and closes, use conventional pressure, the jogging speed injection, observing effect, fine as casting quality, progressively the injection supercharging is excised then, continue to use slow shot, observing effect if foundry goods still is fine, at this moment just should reduce the oil pump outlet pressure again, accumulator also will reduce gas pressure simultaneously, observe the qualified edge of foundry goods always, all absorbed for like this injection power by foundry goods, the reaction force that acts in the core rod drops to minimum point.
In addition, die casting machine all is furnished with three kinds of drifts, the general medium size drift that adopts during designing mould, mould will be matched corresponding supporting die casting machine production, must not produce with the large-tonnage die casting machine by light casting, can produce a series of adverse consequences like this, briefly much bigger as the injection material, the inside air is also just many, and foundry goods is difficult to press well like this, pressed foundry goods exactly, accelerated mould and damage.
Die casting is produced in reason originally should not produce aluminium-plated phenomenon, because the foundry goods projected area surpasses the machine standard, exactly because mould designs and produces lack of standardization and produces aluminium-plated phenomenon.
When design compression mod of the present invention, select when mold materials, should note the relation of specific pressure and mould.
For example: mold materials can be selected 3Cr2W8V or H13 for use, hardness HRC46-48, and tufftride is sent out orchid.
Specific pressure and mould relation
In the formula: F1-injection charged piston large end face is long-pending
F2-drift area
P-accumulator meter pressure legf/Cm
2
Specific pressure multiply by foundry goods projected area (comprising accumulated slag bag and cast gate) must not be greater than the die casting machine die locking force.
Compression mod of the present invention is suitable for not only greatly improving die life with low specific pressure jogging speed injection, and bonding force is little, and is convenient Delivery also is difficult for raising to the lubricant temperature, and machine seal consumable accessory just can not damage, and machine burden reduces greatly, prolongs Long service life of a machine can be simplified injection structure of die casting machine simultaneously greatly.
Claims (8)
1, a kind of compression mod that has the exhaust passage, its composition comprises dynamic model and quiet mould, dynamic model and quiet mould are made of template and core rod respectively, it is characterized in that: dynamic model, quiet mould are made of template and multilayer piece combination mold core, and dynamic model multilayer piece combination mold core is connected with quiet mould template with the dynamic model template respectively with quiet mould multilayer piece combination mold core; Multilayer piece combination mold core is made of outer core rod and two above inner mould cores; Template is provided with exhaust annular groove and steam vent, has exhaust clearance between the inside and outside core rod, and exhaust clearance is connected with the template upper air-vent.
2, according to the described compression mod that has the exhaust passage of claim 1, it is characterized in that: the mould die joint, core rod is wanted a little higher than template, and is gapped between the sound template.
3, according to the described compression mod that has the exhaust passage of claim 2, it is characterized in that: core rod is than the high 0.2-0.3 millimeter of template, and the sound template has 0.5 millimeter gap.
4, according to the described compression mod that has the exhaust passage of claim 1, it is characterized in that: cast gate is arranged at core rod inside.
5, according to the described compression mod that has the exhaust passage of claim 1, it is characterized in that: the compression mod of chute post is arranged, and the hole on the slide block is larger than the chute post.
6, the exhaust passage foundry goods compression mod that has according to claim 1 is characterized in that: the core rod design is more bigger than conventional design.
7, according to claim 1,2,3,4,5, the 6 described exhaust passage foundry goods compression mods that have, it is characterized in that: the described exhaust passage of being made up of steam vent and air discharge duct communicates with atmosphere.
8, a kind of exhaust passage compression mod core rod gap parameter that has is determined method, and it is characterized in that: this method may further comprise the steps,
A, preparation test mould: at first press the foundry goods shape and prepare test mould, have the plurality of rows pore in the exhaust annular groove of this test mould, the gap that varies in size between different steam vents and the core rod is connected, to notice that especially template is lower than core rod, core rod is smooth, and the sound template will have certain clearance behind the mould assembly;
B, heat run mould, progressively pressure testing seek foundry goods when not aluminium-plated the marginal point in corresponding core rod gap: test mould is heated to the 200-250 degree, with three kinds of drifts of die casting machine, every kind of drift is with the pressure testing three times separately of the fast jogging speed of high specific pressure, when aluminium-plated note observing which gap, when not aluminium-plated which gap is, performs record, to determine not aluminium-plated pairing gap parameter;
The compression mod of C, the above-mentioned not aluminium-plated pairing gap parameter actual design multilayer piece combination mold core of foundation;
D, the heating die casting, progressively pressure testing with determine qualified foundry goods the optimum Working of corresponding die casting machine: die casting is warmed to about the 200-250 degree, die casting machine adopts conventional pressure, the jogging speed injection, observing effect, fine as casting quality, progressively the die casting machine injection supercharging is excised then, continue to use slow shot, observing effect again, if foundry goods still is fine, at this moment just should reduce the oil pump outlet pressure, accumulator also will reduce gas pressure simultaneously, observe always, find the injection supercharging of the qualified and die casting machine of foundry goods, the oil pump outlet pressure, reach the accumulator gas pressure and be minimum optimum value, all absorbed for like this injection power by foundry goods, the reaction force that acts in the core rod drops to minimum point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00112494A CN1093015C (en) | 2000-08-31 | 2000-08-31 | Casting die with deairing channel and its core gap parameter determining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00112494A CN1093015C (en) | 2000-08-31 | 2000-08-31 | Casting die with deairing channel and its core gap parameter determining method |
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| Publication Number | Publication Date |
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| CN1288791A CN1288791A (en) | 2001-03-28 |
| CN1093015C true CN1093015C (en) | 2002-10-23 |
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| CN00112494A Expired - Fee Related CN1093015C (en) | 2000-08-31 | 2000-08-31 | Casting die with deairing channel and its core gap parameter determining method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102259138A (en) * | 2011-05-03 | 2011-11-30 | 上海北特科技股份有限公司 | Thermal forming test die with cooling water path |
| CN102950248A (en) * | 2011-08-31 | 2013-03-06 | 吴江市荣顺精密铸件有限公司 | Assembly die |
| CN103100668B (en) * | 2012-12-31 | 2015-08-05 | 东风汽车股份有限公司 | Engine cylinder block casting mould |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095652A (en) * | 1993-05-21 | 1994-11-30 | 丰达雷斯·F·霍德勒有限公司 | Venting valve arrangement for diecasting moulds |
| CN1095653A (en) * | 1993-05-24 | 1994-11-30 | 丰达雷斯，F·霍德勒有限公司 | Die cast assembly with breather valve |
| CN1197706A (en) * | 1997-03-12 | 1998-11-04 | 日本碍子株式会社 | Chill vent |
| CN1220925A (en) * | 1997-11-20 | 1999-06-30 | 日本碍子株式会社 | Chill vent |
| CN1229015A (en) * | 1998-02-19 | 1999-09-22 | 方达雷克斯公司 | Method for venting diecasting mould and apparatus for performing the method |
-
2000
- 2000-08-31 CN CN00112494A patent/CN1093015C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095652A (en) * | 1993-05-21 | 1994-11-30 | 丰达雷斯·F·霍德勒有限公司 | Venting valve arrangement for diecasting moulds |
| CN1095653A (en) * | 1993-05-24 | 1994-11-30 | 丰达雷斯，F·霍德勒有限公司 | Die cast assembly with breather valve |
| CN1197706A (en) * | 1997-03-12 | 1998-11-04 | 日本碍子株式会社 | Chill vent |
| CN1220925A (en) * | 1997-11-20 | 1999-06-30 | 日本碍子株式会社 | Chill vent |
| CN1229015A (en) * | 1998-02-19 | 1999-09-22 | 方达雷克斯公司 | Method for venting diecasting mould and apparatus for performing the method |
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| CN1288791A (en) | 2001-03-28 |
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