CN203541481U - Die-casting device capable of overcoming defect of air holes of die-casting product - Google Patents
Die-casting device capable of overcoming defect of air holes of die-casting product Download PDFInfo
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- CN203541481U CN203541481U CN201320609890.7U CN201320609890U CN203541481U CN 203541481 U CN203541481 U CN 203541481U CN 201320609890 U CN201320609890 U CN 201320609890U CN 203541481 U CN203541481 U CN 203541481U
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Abstract
The utility model relates to a die-casting device capable of overcoming the defect of air holes of a die-casting product. The device comprises a die-casting machine and a vacuumizing device, wherein a punch corresponding to a charging barrel and a feed port are arranged on the charging barrel on the die-casting machine; a moving die and a fixed die are arranged at the rear end of the charging barrel; a die cavity is formed between the moving die and the fixed die; a vacuum valve and a control device for controlling the closing of the vacuum valve are arranged on the end part of the die cavity; a piston ring is arranged on the end part of the punch, and corresponds to the inner wall of the charging barrel. According to the die-casting device capable of overcoming the defect of the air holes of the die-casting product, good vacuumizing effects are achieved, and the device can smoothly run for a long time.
Description
Technical field
The utility model relates to a kind of in Die Casting process, and a kind of die casting equipment that solves die-cast product gas hole defect is provided.
Background technology
Along with the develop rapidly of auto industry, die casing for automobile is more and more higher to the requirement of the porosity.Compression casting product air holes does not still reach the requirement of auto parts and components.Because compression casting process is to make aluminium alloy be full of at short notice die cavity, the gas in die cavity is under the effect of high temperature, high-speed alloy liquid, and the pressure of gas sharply rises, and relies on nature exhaust, and gas cannot clear.From the relation of pressure and solubility: on gas-liquid interface, when gas pressure increases, in liquid, gas solubility increases.When gas pressure reduces, in liquid, the solubility of gas reduces.Gas in mould cavity, under the effect of pressure, is trapped in foundry goods and forms pore, therefore, reduce the pore in compression casting product, must reduce the pressure of gas in die cavity, i.e. vacuum pressing and casting.
The principle of vacuum pressing and casting is exactly: when die casting machine carries out injection, the air in die cavity is extracted out fast, and the gas that makes to be dissolved in aluminium alloy parses, thereby realize vacuum pressing and casting.
Existing vacuum extractor and mode exist and vacuumize not thoroughly, and fused solution easily enters the defect of vacuum valve, thereby bring impact to the die casting quality of product, the normal operation of equipment, to manufacturer, bring very big puzzlement, are necessary to be further improved.
Utility model content
The utility model is for above-mentioned defect, and object is to provide a kind of and can well vacuumizes, and a kind of die casting equipment that solves die-cast product gas hole defect that can the long-time trouble-free operation of assurance device.
The technical solution adopted in the utility model is for this reason: the utility model comprises die casting machine, vacuum extractor, barrel on die casting machine is provided with the drift corresponding with barrel and material inlet, barrel rear end is provided with dynamic model, quiet mould, between dynamic model, quiet mould, form die cavity, the end of die cavity arranges vacuum valve and is provided with controls the control device that vacuum valve cuts out; Nose of punch is provided with piston ring, this piston ring and material tube inner wall correspondence.
On the die joint of described dynamic model, quiet mould, set up sealing ring.
Described vacuum means is set to centralized, comprises a vavuum pump being connected with some die casting machines, and vavuum pump rear end connects a vacuum tank.
Solve a press casting procedure for die-cast product gas hole defect, according to following steps, carry out:
1) while pouring the aluminium alloy of melting into barrel, injection rod drift starts reach, in order to prevent that drift from producing volume gas in the process of reach, adopts the low speed segmentation of 0.15～0.3m/s to move, and molten metal is in laminar condition;
2) when the aluminium alloy of melting is transferred to mould gate, in order to get rid of rapidly the gas of mould cavity, drift enters low speed and switching position at a high speed, within the time of 0.03～0.05s, instantaneous 3～the 6m/s that rises to of the drift speed of service, reaches the target of Fast Filling;
3) when high speed filling completes, aluminium-plated in order to prevent overlap, the speed of service of drift enters high deceleration state, subsequently in order to eliminate the shrinkage cavity suppressing in aluminium alloy process of setting, adopt supercharging technique simultaneously, wherein vacuumize within 1 stage and complete, concrete way is carried out between 30～60mm before cast gate at drift sealing material inlet; Described vacuumizing by vavuum pump and vacuum tank completes, and adopts the mode that vacuumizes of concentrating.
Described vacuum valve advances, direction of retreat sets up travel switch separately.
The utility model is according to every die casting machine die cavity volume, 0.5 times of gas gross Q(liter extracting as every die casting of barrel volume), bleed the time:
The uncovered size of high speed position-barrel-(0.03～0.06m)
T(second)=----------------
Injection rod low speed average speed (0.15～0.3m/s),
Q(liter)
So the required speed of exhaust of every die casting machine (mould) is-----,
T(second)
Q
1 Q
2 Q
n
The speed of exhaust Q=of whole Die Casting Workshop--+--+... +--
t
1 t
2 t
n ，
By (0.4～0.6) Q, choose the rate of air sucked in required per second of vacuum machine.
The volume of described vacuum tank is chosen by 3～5 times of the maximum rate of air sucked in required of die casting equipment.
The apolegamy in vacuum-pumping tube webmaster footpath: according to calculating, according to the form below is matched:
Described vavuum pump is arranged on the center of each die casting machine, and vacuum is set by-0.88～-0.95MPa, and possesses upper and lower limit warning function.
The advantage that the utility model reaches is: 1) satisfactory mechanical property, and dimensional accuracy is high, smooth surface;
2) production efficiency is high, and a production cycle only has 0.5-3min.Metal material utilization rate is high;
3) minimum wall thickness (MINI W.) can reach 1～2mm;
4) owing to adopting low speed conveying, high-speed filling, supercharging feeding, select evacuation process on suitable opportunity, product dense structure, the porosity is lower.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of vacuum extractor.
Fig. 3 is the coordinate diagram of the utility model press casting procedure.
In figure, 1 is that drift, 2 is that barrel, 3 is that quiet mould, 4 is that dynamic model, 5 is piston ring.
The specific embodiment
The utility model comprises die casting machine, vacuum extractor, barrel 2 on die casting machine is provided with drift 1 and the material inlet with barrel 2 correspondences, barrel 2 rear ends are provided with dynamic model 4, quiet mould 3, between dynamic model 4, quiet mould 3, form die cavity, the end of die cavity arranges vacuum valve and is provided with controls the control device that vacuum valve cuts out; Drift 1 end is provided with piston ring 5, this piston ring 5 and barrel 2 inwall correspondences.
The engineering process of the utility model die casting equipment is, as follows specifically: by molten alloy liquid under effect at a high speed, the die cavity of Fast Filling mould, and make aluminium alloy crystallization under the effect of high pressure, solidify, moulding.When soup feeding machine is poured the aluminium alloy of melting into barrel 2, injection rod drift 1 starts reach, in order to prevent that drift 1 from producing volume gas in the process of reach, adopt the low speed segmentation of 0.15～0.3m/s to move, molten metal is in laminar condition, when the aluminium alloy of melting is transferred to mould gate road, in order to get rid of rapidly the gas of mould cavity, drift enters low speed and switching position at a high speed.Within the time of 0.03～0.05s, the instantaneous 3～6m/s that rises to of the drift speed of service, reaches the target of Fast Filling, and when high speed filling completes, aluminium-plated in order to prevent overlap, the speed of service of drift enters high deceleration state.Subsequently, in order to eliminate the shrinkage cavity suppressing in aluminium alloy process of setting, adopt supercharging technique, its casting pressure, at 100MPa, acts on foundry goods simultaneously, and the performance of foundry goods, compared with traditional gravitational casting, the variation of matter has occurred.
On superincumbent basis, further launch below to describe, to be more conducive to understand the purpose of this utility model: the utility model adopts central controlled vacuum system.During due to injection, compole is short, cannot rely on the keying of vavuum pump Bas Discharged, therefore adopts a large vacuum tank to realize.Vavuum pump, under normal condition, clears the air in vacuum tank, makes vacuum tank maintain a higher vacuum level, then in the moment of die casting, opens the magnetic valve of vacuum tank and die cavity, realizes the vacuum of die cavity.
The designing and calculating of vacuum system and pipeline:
According to every die casting machine die cavity volume and 0.5 times of gas gross Q(liter extracting as every die casting of barrel volume), what injection rod allowed bleeds the time:
The uncovered size of high speed position-barrel-(0.03～0.06m)
T(second)=----------------
Injection rod low speed average speed (0.2～0.3m/s),
Q(liter)
So the required speed of exhaust of every die casting machine (mould) is-----,
T(second)
Q
1 Q
2 Q
n
The speed of exhaust Q=of whole Die Casting Workshop--+--+... +--
t
1 t
2 t
n
Due to product structure difference, the asynchronism of production cycle difference and many die casting machine injections, the general rate of air sucked in required per second of choosing vacuum machine by (0.4～0.6) Q.For what adapt to die casting, begin a theatrical performance number change and energy-conservation, generally adopt the control system of three vacuum tube machines, wherein one as standby vacuum machine.Vacuum air storage tank volume: generally choose by 3～5 times of the maximum rate of air sucked in required of die-casting system.
The apolegamy of pipe network caliber: excessive in order to reduce vacuum draw process drag losses, cause the reduction of every die casting machine vacuum, a caliber of every die casting machine is to the greatest extent greatly optional.According to calculating, can match by according to the form below:
On the other hand, in order to reduce row and the difference of arranging, vacuum system should be arranged on the center of die casting machine; The vacuum of vacuum system should be set by-0.88～-0.95MPa, and possesses upper and lower limit warning function.
The utility model in use, in order to reduce the leakage rate of mold parting surface, increases sealing ring at mold parting surface.In addition, in order to improve the sealing of drift and barrel, on drift, increase copper piston ring.
The utility model die casting machine, in normal use procedure, must increase by two and output signal to vacuum-control(led) system, a: vacuum control valve opening signal, b: vacuum control valve shutdown signal.Under general state, as long as injection rod drift reach sealing material inlet can enter and vacuumize.And how to control closing of vacuum valve, just seem particularly important.From result of use, vacuum valve only cuts out after the complete filling mould cavity of molten metal, and it is best that the effect of vacuum just can reach.But because quick injection time is very short, aluminium alloy is easy to enter vacuum valve, causes vacuum valve to stop up, once and stop up, dismantle very numb numerously, impact is use normally.Therefore, closing of vacuum valve, be placed on the first stage of injection, the front 30～60mm of point closes at a high speed.On the other hand, for checking the running-active status of vacuum valve, in the limit of advancing of vacuum control valve, retreat limit and increase by two travel switches, and by signal feedback to die casting machine, once abnormal, die casting machine is normally injection just, and sends alarm signal, prompting operation work checks in time, pinpoints the problems, deals with problems.Stopping substandard product produces.
Claims (3)
1. one kind solves the die casting equipment of die-cast product gas hole defect, it is characterized in that, comprise die casting machine, vacuum extractor, barrel on die casting machine is provided with the drift corresponding with barrel and material inlet, barrel rear end is provided with dynamic model, quiet mould, between dynamic model, quiet mould, form die cavity, the end of die cavity arranges vacuum valve and is provided with controls the control device that vacuum valve cuts out; Nose of punch is provided with piston ring, this piston ring and material tube inner wall correspondence.
2. a kind of die casting equipment that solves die-cast product gas hole defect according to claim 1, is characterized in that, on the die joint of dynamic model, quiet mould, sets up sealing ring.
3. a kind of die casting equipment that solves die-cast product gas hole defect according to claim 1, is characterized in that, described vacuum means is set to centralized, comprises pipeline and vacuum tank that vavuum pump is connected with some die casting machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320609890.7U CN203541481U (en) | 2013-09-30 | 2013-09-30 | Die-casting device capable of overcoming defect of air holes of die-casting product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320609890.7U CN203541481U (en) | 2013-09-30 | 2013-09-30 | Die-casting device capable of overcoming defect of air holes of die-casting product |
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| Publication Number | Publication Date |
|---|---|
| CN203541481U true CN203541481U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320609890.7U Expired - Lifetime CN203541481U (en) | 2013-09-30 | 2013-09-30 | Die-casting device capable of overcoming defect of air holes of die-casting product |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170935A (en) * | 2015-08-31 | 2015-12-23 | 重庆长安汽车股份有限公司 | High-pressure casting mold filling visualization device |
| CN107008879A (en) * | 2017-06-08 | 2017-08-04 | 江苏华晟电气科技有限公司 | A kind of molten rifle of die casting machine note |
| CN108515158A (en) * | 2018-04-09 | 2018-09-11 | 清华大学 | Non-crystaline amorphous metal melting die cast device and method |
| CN113369461A (en) * | 2021-06-29 | 2021-09-10 | 广东鸿图南通压铸有限公司 | High-vacuum processing technology for aluminum alloy die casting |
-
2013
- 2013-09-30 CN CN201320609890.7U patent/CN203541481U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170935A (en) * | 2015-08-31 | 2015-12-23 | 重庆长安汽车股份有限公司 | High-pressure casting mold filling visualization device |
| CN107008879A (en) * | 2017-06-08 | 2017-08-04 | 江苏华晟电气科技有限公司 | A kind of molten rifle of die casting machine note |
| CN108515158A (en) * | 2018-04-09 | 2018-09-11 | 清华大学 | Non-crystaline amorphous metal melting die cast device and method |
| CN113369461A (en) * | 2021-06-29 | 2021-09-10 | 广东鸿图南通压铸有限公司 | High-vacuum processing technology for aluminum alloy die casting |
| CN113369461B (en) * | 2021-06-29 | 2023-09-26 | 广东鸿图南通压铸有限公司 | Processing technology for aluminum alloy die casting high vacuum |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |
|
| CX01 | Expiry of patent term |