CN104057062B - The method of sand mold low pressure casting shutoff gating apparatus and sand mold low pressure casting - Google Patents
The method of sand mold low pressure casting shutoff gating apparatus and sand mold low pressure casting Download PDFInfo
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- CN104057062B CN104057062B CN201410324447.4A CN201410324447A CN104057062B CN 104057062 B CN104057062 B CN 104057062B CN 201410324447 A CN201410324447 A CN 201410324447A CN 104057062 B CN104057062 B CN 104057062B
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Abstract
A method for sand mold low pressure casting shutoff gating apparatus and sand mold low pressure casting, produces groove at the sprue position of casting mold, places closeouts in a groove, closeouts has square plug hole.Mill out shutoff bullport at the lower sand mold back side, bullport arranged outside oil cylinder, its piston rod stretches to the bullport of casting mold.Its method for blocking is after control system receives the signal of low pressure casting casting complete, control cylinder piston rod to stretch out fast, the block-type sand promoted in casting mold along bullport moves forward together with closeouts, oil cylinder reaches stop motion low pressure casting compression system exhaust pressure relief simultaneously after certain stroke, after closeouts dislocation, sprue is separated.The casting mold that shutoff is good can move apart pouring position together with the foundry goods do not solidified completely, and by cooled and solidified after casting mold upset.Then another set of casting mold is moved to pouring position to pour into a mould.The present invention is mainly for the manufacture of low pressure casting complete set of equipments.
Description
The application is the applying date is on August 27th, 2012, and application number is 2012103070717, and name is called the divisional application of the Chinese invention patent application of the method for sand mold low pressure casting shutoff gating apparatus and sand mold low pressure casting.
Technical field
The present invention relates to a kind of casting device and process thereof, this device and method is mainly used on aluminium alloy tide mould sand type low pressure casting.
Background technology
Because sand mold low pressure casting is full of casting mold from bottom to top under antigravity state, fill type and steadily, easily control, be convenient to casting mold exhaust, casting quality is good.This process is used widely at casting field.
At present, in known sand mold Low Pressure Casting Technology, when carrying out sand mold low pressure casting, normally after pressure casting and pressurize are solidified casting mold (together with foundry goods) to be moved apart pouring position completing.But due to sand mold poor thermal conductivity, the casting solidification time is long, causes productivity ratio lower.
Summary of the invention
The present invention is directed to the shortcoming that prior art exists, propose and a kind of fill after type terminates in low pressure casting pressurization, by cast gate plugging device, quick blocking cast gate (simultaneously low pressure casting compression system exhaust pressure relief).So just casting mold can be moved apart pouring position, upset casting mold carries out cooled and solidified.Then, another set of casting mold is moved to pouring position and pours into a mould, thus increase substantially productivity ratio.
The technology used in the present invention measure is: a kind of sand mold low pressure casting shutoff gating apparatus, it comprises upper and lower sand mold, produce groove with casting pattern draft at the sprue position of described upper and lower sand mold, described closeouts is placed in described groove, the bullport supplying the driver part of closeouts driving mechanism to pass through is set at the described lower sand mold back side, at bullport arranged outside closeouts driving mechanism.
The concrete feature of this programme also has, and described closeouts driving mechanism comprises oil cylinder, and cylinder piston rod is just to the bullport of lower sand mold.
Described closeouts comprises ceramic plugging block and is arranged at by bullport and sprue isolated reservation sand group between bullport and sprue, and the setting retaining sand group makes bullport and sprue can not be through; Upper sand mold groove is on one side along the diminishing step-like groove of ceramic plugging block direction of advance, and depth of groove is greater than the displacement of described ceramic plugging block; The molding sand of sand mold groove side is sheared in the front end of pottery plugging block in movement forward, and interior formation of the remaining space being deposited in ceramic plugging block front end groove shears sand group.
Described ceramic plugging block there is square plug hole.
Described closeouts comprises the resin sand lump be fixed in groove and the shutoff steel plate be slidably matched with it.Resin sand lump is bondd by two halves sand lump and combines; Resin sand lump arranges plug hole, in the middle part of resin sand lump, arranges gathering sill perpendicular to plug hole axis, gathering sill to be arranged at respectively on two halves sand lump and to form pilot hole after combination; In the pilot hole that shutoff steel plate is arranged at side and with it cunning joins the shutoff realized plug hole, and the other end of shutoff steel plate extends in bullport.Pilot hole is distributed in plug hole both sides and and the resin sand of interval 5-10mm between plug hole.Gap between pilot hole and shutoff steel plate is no more than 0.1 ~ 0.2mm, and the pilot hole being positioned at shutoff steel plate offside is provided with aluminium silicate wool.
Place screen pack in sprue porch, play aluminum filtration liquid and prevent sand grains from falling in low-pressure casting thermal insulation furnace.
Present invention also offers a kind of method of sand mold low pressure casting, it comprises the steps: after control system receives the signal of low pressure casting casting complete, described propelling cylinder piston rod stretches out fast, the closeouts promoted in casting mold along bullport moves forward, described propelling cylinder stops after reaching certain stroke, simultaneously low pressure casting compression system exhaust pressure relief; Now, after described closeouts dislocation, sprue separated and stop aluminium liquid to flow out; The casting mold that shutoff is good can move apart pouring position together with the foundry goods do not solidified completely, and by cooled and solidified after casting mold upset; Then another set of casting mold is moved to pouring position to pour into a mould.
The invention provides two cover technical schemes:
Scheme one: one of sand mold low pressure casting shutoff gating apparatus and method for blocking.It comprises upper and lower sandbox, molding sand is formed after filling sand mold, industrial ceramics plugging block, screen pack, ceramic lift tube and propelling cylinder.It is characterized in that forming casting mold by tide mould sand filling moulding in upper and lower sandbox.Produce groove at the sprue position of casting mold, in a groove placing ceramic plugging block, plugging block has square plug hole.Place screen pack in sprue porch, play aluminum filtration liquid and prevent sand grains from falling in low-pressure casting thermal insulation furnace.Mill out bullport at the lower sand mold back side, this bullport is not through with sprue, retains a part of sand group therebetween.At bullport arranged outside propelling cylinder, its piston rod stretches to the bullport of casting mold.Its method for blocking is after control system receives the signal of low pressure casting casting complete, cylinder piston rod stretches out fast, move forward along the reservation sand group in bullport promotion casting mold and ceramic plugging block, cylinder piston rod stops after reaching certain stroke (simultaneously low pressure casting compression system exhaust pressure relief).Now, after ceramic plugging block dislocation, sprue is separated, the reservation sand group of piston rod front end moves forward, the gap in shutoff between plugging block and casting mold, stops aluminium liquid to flow out.The casting mold that shutoff is good can move apart pouring position together with the foundry goods do not solidified completely, and by cooled and solidified after casting mold upset.Then another set of casting mold is moved to pouring position to pour into a mould.
Scheme two: sand mold low pressure casting shutoff gating apparatus and method two.It comprises upper and lower sandbox, molding sand is formed after filling sand mold, resin sand lump, shutoff steel plate, screen pack, ceramic lift tube and propelling cylinder.It is characterized in that forming casting mold by tide mould sand filling moulding in two halves sandbox.Produce groove at the sprue position of casting mold, place resin sand lump in a groove, resin sand lump has square plug hole and pilot hole.Place screen pack in sprue porch, play aluminum filtration liquid and prevent sand grains from falling in low-pressure casting thermal insulation furnace.Mill out bullport at the lower sand mold back side, shutoff steel plate is put into the pilot hole of resin sand lump, and reach in bullport.At bullport arranged outside oil cylinder, its piston rod stretches to the bullport of casting mold.Its method for blocking is after control system receives the signal of low pressure casting casting complete, cylinder piston rod stretches out fast, promote shutoff steel plate to move forward along pilot hole, cylinder piston rod stops after arriving certain stroke (simultaneously low pressure casting compression system exhaust pressure relief).Now, shutoff steel plate moves to insert in resin sand lump opposite side pilot hole and sprue is separated, and due to the cooling effect of steel plate, aluminium liquid can be stoped to flow out from the gap between steel plate and sand mold.The casting mold that shutoff is good can move apart pouring position together with the foundry goods do not solidified completely, and by cooled and solidified after casting mold upset.Then another set of casting mold is moved to pouring position to pour into a mould.
The invention has the beneficial effects as follows, the feature pouring cast part utilizing low pressure casting steadily, easily to control at antigravity state lower charging type, can reduce casting defect, improves casting quality.Utilize cast gate plugging device and method, block cast gate, casting mold is moved apart pouring position, and by cooled and solidified after casting mold upset, then another set of casting mold is moved to pouring position and pour into a mould.The production efficiency of sand mold low pressure casting can be increased substantially.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, two schemes of the present invention are further illustrated.
Fig. 1 ~ Fig. 5 is structure and the method schematic diagram of the present invention program one.Wherein, Fig. 1 is the present invention program one shutoff pre-structure schematic diagram; Fig. 2 is structural representation after the present invention program one shutoff; Fig. 3 is the B direction view of Fig. 1; Fig. 4 is that the A-A of Fig. 3 is to sectional view; Fig. 5 is that casting mold is together with the structural representation after foundry goods upset.
Fig. 6 ~ Figure 10 is structure and the method schematic diagram of the present invention program two.Wherein, Fig. 6 is the present invention program two shutoff pre-structure schematic diagram; Fig. 7 is structural representation after the present invention program two shutoff; Fig. 8 is the B direction view of Fig. 6; Fig. 9 is that the A-A of Fig. 8 is to sectional view; Figure 10 is that casting mold is together with the structural representation figure after foundry goods upset; Figure 11 ~ Figure 12 is the resin sand formation of lots schematic diagram in scheme two.
In figure: 1-cope; The upper sand mold of 2-; 3-drag box; Sand mold under 4-; 5-foundry goods die cavity; 6-oil cylinder; 7-screen pack; 8-sealing gasket; 9-ceramic lift tube; 10-groove; 11-foundry goods; 12-shutoff sand group; 13-sprue; 14-shears sand group; 15-bullport; 16-retains sand group; 17-pottery plugging block; 18-pilot hole; 19-resin sand lump; 20-shutoff steel plate; 21-gathering sill; 22-aluminium silicate wool.
Detailed description of the invention
Embodiment one:
As shown in Fig. 1 ~ 5, a kind of sand mold low pressure casting shutoff gating apparatus, it comprises sand mold 2 and lower sand mold 4, produce groove 10 with casting pattern draft at the sprue position of described upper sand mold 2, lower sand mold 4, described closeouts is placed in described groove 10, the bullport 15 supplying the driver part of closeouts driving mechanism to pass through is set at described lower sand mold 4 back side, at bullport 15 arranged outside closeouts driving mechanism.Described closeouts driving mechanism comprises oil cylinder 6, and oil cylinder 6 piston rod is just to the bullport 15 of lower sand mold 4.Described closeouts comprises ceramic plugging block 17 and to be arranged at bullport 15 and sprue 13 isolated reservation sand group 16 between bullport 15 and sprue 13, and the setting retaining sand group 16 makes bullport 15 and sprue 13 can not be through; Being positioned at sand mold 2 groove 10 is on one side along the diminishing step-like groove of ceramic plugging block 17 direction of advance, and groove 10 degree of depth is greater than the displacement of described ceramic plugging block 17; The molding sand of sand mold 2 groove 10 side is sheared in the front end of pottery plugging block 17 in movement forward, and interior formation of the remaining space being deposited in ceramic plugging block 17 front end groove 10 shears sand group 14.
Described ceramic plugging block 17 there is square plug hole.Place screen pack 7 in sprue 13 porch, play aluminum filtration liquid and prevent sand grains from falling in low-pressure casting thermal insulation furnace.
During use, adopt tide mould sand in cope 1, drag box 3, to produce sand mold 2 and lower sand mold 4 respectively, mill out bullport 15 at described lower sand mold 4 back side.Ceramic plugging block 17 be placed in the groove 10 of lower sand mold 4, groove 10 has the casting pattern draft of direction as shown, is stepped recesses at the groove of described upper sand mold 2.Described upper sand mold 2 and lower sand mold 4 are closed up and lock.In sprue 13 porch, form complete casting mold after placing screen pack 7, the casting mold assembled is moved to pouring position, docks with ceramic lift tube 9, between described screen pack 7 and ceramic lift tube 9, place aluminium silicate wool sealing gasket 8.Oil cylinder 6 is set in bullport 15 side of described lower sand mold 4, its piston rod and described bullport 15 centering.
After casting mold moves to pouring position, carry out low-pressure casting (Fig. 1).Aluminium liquid rises along ceramic lift tube 9, enters die cavity 5 through screen pack 7 and ceramic plugging block 17.Be full of after die cavity 5 until aluminium liquid, Low Pressure Casting Control System sends signal, the piston rod of oil cylinder 6 stretches out (simultaneously fast, low pressure casting compression system exhaust pressure relief), to enter and by described bullport 15, reservation sand group 16 described in promotion and ceramic plugging block 17 move forward, pottery plugging block 17 blocks described sprue 13, described reservation sand group 16 is by bursting and move forward, be deposited in cylinder piston rod front end, form shutoff sand group 12(Fig. 2), block gap between ceramic plugging block 17 and lower sand mold 4 (for ease of molding during moulding, this gap can be controlled between 0.2-0.5mm), retardance aluminium hydrorrhea goes out.Stop after the piston rod of the oil cylinder 6 described in control stretches out certain stroke, then retract.When the front end of described ceramic plugging block 17 moves forward, the molding sand of the upper sand mold 2 groove side described in shearing, because depth of groove is greater than the displacement of described ceramic plugging block 17, the molding sand sheared is deposited in the remaining space of ceramic plugging block 17 front end groove, formed and shear sand group 14, ensure that described upper sand mold 2 can not by bursting.
The casting mold that shutoff is good moves apart pouring position together with the foundry goods 11 do not solidified completely, and cooled and solidified (Fig. 5) is carried out in upset.Then, then another set of casting mold is moved to pouring position to pour into a mould.
Embodiment two:
As shown in Fig. 6 ~ Figure 10, the present embodiment and embodiment one something in common repeat no more, and difference is, described closeouts comprises the resin sand lump 19 be fixed in groove 10 and the shutoff steel plate 20 be slidably matched with it.Resin sand lump 19 is bondd by two halves sand lump and combines; Resin sand lump 19 arranges plug hole, in the middle part of resin sand lump 19, arranges gathering sill 21 perpendicular to plug hole axis, gathering sill 21 to be arranged at respectively on two halves sand lump and to form pilot hole 18 after combination; In the pilot hole 18 that shutoff steel plate 20 is arranged at side and with it cunning joins the shutoff realized plug hole, and the other end of shutoff steel plate 20 extends in bullport 15.Pilot hole 18 is distributed in plug hole both sides and and the resin sand of interval 5-10mm between plug hole.Gap between pilot hole 18 and shutoff steel plate 20 is no more than 0.1 ~ 0.2mm, and the pilot hole 18 being positioned at shutoff steel plate 20 offside is provided with aluminium silicate wool 22.
A kind of sand mold low pressure casting shutoff gating apparatus and method (two).Tide mould sand is adopted in cope 1, drag box 3, to produce sand mold 2 and lower sand mold 4 respectively.Resin sand is adopted to produce resin sand lump 19, resin sand lump 19 is bondd by two halves sand lump and combines (Figure 11, Figure 12), pilot hole 18 is formed after combination, the wide 5mm of pilot hole 18, distance between pilot hole 18 and plug hole is 5 ~ 10mm(Figure 12), and the gap between described shutoff steel plate 20 is no more than 0.1 ~ 0.2mm.Two halves sand lump makes gathering sill 21 respectively.Before combination, aluminium silicate wool 22 is placed in the gathering sill 21 interior (Figure 12) of the two halves sand lump of upper sand mold 2.After combination, shutoff steel plate 20 is inserted in the pilot hole 18 on described resin sand lump 19.Described resin sand lump 19 is placed on together with described shutoff steel plate 20 in the groove 10 of lower sand mold 4, described upper sand mold 2 and lower sand mold 4 is closed up and locks formation casting mold.In sprue 13 porch, form complete casting mold after placing aluminium alloy liquid screen pack 7, the casting mold assembled is moved to pouring position, docks with ceramic lift tube 9, between described screen pack 7 and ceramic lift tube 9, place aluminium silicate wool sealing gasket 8.
After casting mold is moved to pouring position, carry out low-pressure casting (Fig. 6).Aluminium liquid rises along ceramic lift tube 9, enters foundry goods die cavity 5 through screen pack 7 and resin sand lump 19.Be full of after foundry goods die cavity 5 until aluminium liquid, Low Pressure Casting Control System sends signal, the piston rod of oil cylinder 6 stretches out (simultaneously fast, low pressure casting compression system exhaust pressure relief), enter described bullport 15, the shutoff steel plate 20 described in promotion moves forward, and shutoff steel plate 20 blocks described sprue 13, and entering in the pilot hole 18 at aluminium silicate wool 22 place (Fig. 7) through resin sand lump 19, aluminium silicate wool 22 stops aluminium immersion to enter.Stop after the piston rod of described oil cylinder 6 stretches out certain stroke, then retract.Even if there is a small amount of aluminium liquid to creep into gap between shutoff steel plate 20 and resin sand lump 19, also solidifies because of the cooling effect of steel plate, prevent aluminium hydrorrhea to go out.
The casting mold that shutoff is good moves apart pouring position together with the foundry goods 11 do not solidified completely, and cooled and solidified (Figure 10) is carried out in upset.Then another set of casting mold is moved to pouring position to pour into a mould.
Claims (5)
1. a sand mold low pressure casting shutoff gating apparatus, it comprises upper and lower sand mold, produce groove with casting pattern draft at the sprue position of described upper and lower sand mold, closeouts is placed in described groove, the bullport supplying the driver part of closeouts driving mechanism to pass through is set at the described lower sand mold back side, at bullport arranged outside closeouts driving mechanism; Described closeouts comprises ceramic plugging block and is arranged at bullport and sprue isolated reservation sand group between bullport and sprue; Upper sand mold groove is on one side along the diminishing step-like groove of ceramic plugging block direction of advance, and depth of groove is greater than the displacement of described ceramic plugging block.
2. sand mold low pressure casting shutoff gating apparatus according to claim 1, it is characterized in that described closeouts driving mechanism comprises oil cylinder, cylinder piston rod is just to the bullport of lower sand mold.
3. sand mold low pressure casting shutoff gating apparatus according to claim 1, is characterized in that described ceramic plugging block has square plug hole.
4. sand mold low pressure casting shutoff gating apparatus according to claim 1, is characterized in that placing screen pack in sprue porch, plays aluminum filtration liquid and prevent sand grains from falling in low-pressure casting thermal insulation furnace.
5. the method for a sand mold low pressure casting, it uses sand mold low pressure casting shutoff gating apparatus as claimed in claim 2, comprise the steps: after control system receives the signal of low pressure casting casting complete, described cylinder piston rod stretches out fast, the closeouts promoted in casting mold along bullport moves forward, described oil cylinder stops after reaching certain stroke, simultaneously low pressure casting compression system exhaust pressure relief; Now, after described closeouts dislocation, sprue separated and stop aluminium liquid to flow out; The casting mold that shutoff is good moves apart pouring position together with the foundry goods do not solidified completely, and by cooled and solidified after casting mold upset; Then another set of casting mold is moved to pouring position to pour into a mould.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210307071.7A CN102773458B (en) | 2012-08-27 | 2012-08-27 | Sprue plugging device for casting sand mold at low pressure and method for casting sand mold at low pressure |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210307071.7A Division CN102773458B (en) | 2012-08-27 | 2012-08-27 | Sprue plugging device for casting sand mold at low pressure and method for casting sand mold at low pressure |
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| Publication Number | Publication Date |
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| CN104057062A CN104057062A (en) | 2014-09-24 |
| CN104057062B true CN104057062B (en) | 2016-01-20 |
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| CN201410324447.4A Expired - Fee Related CN104057062B (en) | 2012-08-27 | 2012-08-27 | The method of sand mold low pressure casting shutoff gating apparatus and sand mold low pressure casting |
| CN201410324643.1A Expired - Fee Related CN104043806B (en) | 2012-08-27 | 2012-08-27 | The method of sand mold low pressure casting shutoff gating apparatus and sand mold low pressure casting |
| CN201210307071.7A Expired - Fee Related CN102773458B (en) | 2012-08-27 | 2012-08-27 | Sprue plugging device for casting sand mold at low pressure and method for casting sand mold at low pressure |
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| CN201410324643.1A Expired - Fee Related CN104043806B (en) | 2012-08-27 | 2012-08-27 | The method of sand mold low pressure casting shutoff gating apparatus and sand mold low pressure casting |
| CN201210307071.7A Expired - Fee Related CN102773458B (en) | 2012-08-27 | 2012-08-27 | Sprue plugging device for casting sand mold at low pressure and method for casting sand mold at low pressure |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057062B (en) * | 2012-08-27 | 2016-01-20 | 济南铸造锻压机械研究所有限公司 | The method of sand mold low pressure casting shutoff gating apparatus and sand mold low pressure casting |
| WO2014171723A1 (en) * | 2013-04-17 | 2014-10-23 | Shin Kwang Ja | Mould |
| CN104259389B (en) * | 2014-09-09 | 2016-04-13 | 西安航空动力股份有限公司 | A kind of single crystal casting feed trumpet and preparation method thereof |
| CN104588587A (en) * | 2015-02-11 | 2015-05-06 | 张家港华日法兰有限公司 | Flange plate blank casting pouring system |
| CN105127383B (en) * | 2015-09-29 | 2017-05-10 | 中冶京诚工程技术有限公司 | Runner plugging device for water-cooling die casting |
| CN106563787A (en) * | 2015-10-12 | 2017-04-19 | 天津达祥精密工业有限公司 | Negative-pressure up-draft casting device |
| CN105312515B (en) * | 2015-11-26 | 2018-12-18 | 中冶京诚工程技术有限公司 | The Casting Equipment and its method of Wide and Thick Slab steel ingot |
| CN106955987A (en) * | 2017-05-09 | 2017-07-18 | 国营第六六厂 | Low pressure casting rising head plugging device and method for blocking |
| CN107321959B (en) * | 2017-09-05 | 2019-04-16 | 哈尔滨工业大学 | Large ship rises liquid disabling mechanism with copper alloy propeller counter-pressure casting |
| CN112475232A (en) * | 2020-12-10 | 2021-03-12 | 中国科学院金属研究所 | Large ceramic shell flow choking method for allowance-free precision casting |
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- 2012-08-27 CN CN201210307071.7A patent/CN102773458B/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104057062A (en) | 2014-09-24 |
| CN102773458B (en) | 2014-09-03 |
| CN104043806B (en) | 2016-04-27 |
| CN104043806A (en) | 2014-09-17 |
| CN102773458A (en) | 2012-11-14 |
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