CN1306892A - Sand densifying mechanism and method for molding machine with pneumatic pressing and pushing contact - Google Patents
Sand densifying mechanism and method for molding machine with pneumatic pressing and pushing contact Download PDFInfo
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- CN1306892A CN1306892A CN 00110059 CN00110059A CN1306892A CN 1306892 A CN1306892 A CN 1306892A CN 00110059 CN00110059 CN 00110059 CN 00110059 A CN00110059 A CN 00110059A CN 1306892 A CN1306892 A CN 1306892A
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Abstract
The molding machine contains bench, formwork, sand box, redundant sand basket, pneumatic pressing head mechanism with forming contact above the bench. In the same identical work place, sand mold is first pre-densified with forming contact, then pneumatically pressed and finally shock densified. The molding machine has high sand densifying effect, low power consumption and high efficiency.
Description
The present invention relates to a kind of sand casting moulding machine sand densifying mechanism and sand densifying method.
The key link of sand casting is moulding, and the core of moulding machine is a sand densifying mechanism.Squeeze moulding machine is a kind of low speed sand densifying mechanism that history decades is arranged in being applied to produce, and its sand densifying mechanism is simple, but the lower and skewness of compacting gained sand mold compactability; The compacting of shaping pressing plate helps improving the model top and the uniformity of sand mold compactability all around; But generally speaking, squeeze mo(u)lding gained sand mold compactability is lower, and particularly the sand mold die joint degree of packing is on the low side, and the gained casting dimension accuracy is lower, and surface quality is poor.Along with Foundry Production development and development of technology, jolt squeezing machine, high-pressure molding machine, shoot squeeze molding machine and corresponding sand densifying method thereof have appearred in succession.Air impact molding machine and sand densifying method thereof are the Modeling Technology that closely develops and obtained extensive use during the last ten years rapidly.Gas is compared with above several sand densifying methods towards moulding, and its sand densifying mechanism is simple, the productivity ratio height, and gained sand mold compactability height, particularly the die joint degree of packing are high and more even, the casting dimension accuracy height of producing, surface quality is good.But gas also exposes some very important drawbacks aborning towards moulding.During the last ten years, gas constantly improves to some extent towards Modeling Technology.The research and development of method such as " supercharging gas dashes ", " differential gas dashes ", " gain gas dashes ", basically eliminated " arching " of gas towards moulding, promptly when higher, the mold thickness of apperance hour, gas is solved basically towards the bad problem of the degree of packing that moulding sand mold edge and dark recess occur.Yet production shows with practice: simple gas is towards consolidation, and the sand mold back always exists the loose sand of 30-50MM, and this part molding sand must remove after moulding.This has caused the serious waste of molding sand on the one hand, gas is reduced towards the effective rate of utilization of molding flask short transverse, make gas generally must could obtain qualified sand mold greater than 250MM towards the minimum constructive height of molding flask, so just restricted the range of application of gas, and the work of transforming old jolting line, high-pressure molding line towards formative method with gas has been brought more difficulty towards moulding.At these problems, the moulding machine of air pressure multiple contact or flexible pressure head compacting had abroad appearred using after gas dashes in recent years again, though this moulding machine has overcome the above-mentioned drawback of simple gas towards moulding, but it has increased the operation of a low speed compacting, reduced the productivity ratio of machine, and the machine construction complexity, investment increases, energy consumption increases, and is not to get twice the result with half the effort.
The object of the present invention is to provide a kind of simple in structure, power consumption is low, efficient is high and can overcome pneumatic pressing and pushing shaping contact moulding machine sand densifying mechanism and the sand densifying method thereof of simple gas towards many drawbacks that moulding caused.
Technical solution of the present invention can realize according to following mode:
A kind of pneumatic pressing and pushing shaping contact moulding machine sand densifying mechanism is characterized in that: contain: workbench, template, apperance, sandbox, strike-off frame, be assigned in the gas drift of workbench top; Described gas drift contains: gas inclusion, port are furnished with air inlet-outlet pipe, membrane valve, flat quck-opening valve, porous bearing, the shaping contact of solenoid directional control valve; Described flat quck-opening valve and porous bearing are positioned at gas inclusion; Porous bearing and gas ram bottom are joined; Flat quck-opening valve and porous bearing are fixedly connected; The gas inclusion inner chamber communicates with the cylindricality cavity of porous bearing; Air inlet-outlet pipe communicates with last blast pipe; The lower port of last blast pipe communicates with flat quck-opening valve epicoele; The piston on described shaping contact push rod top and the center cylindricality cavity inner wall of porous bearing are movingly; On the shaping contact, be provided with steam vent; Described membrane valve is assigned in the top of gas inclusion and corresponding with the upper port of last blast pipe.
The sand densifying method of pneumatic pressing and pushing shaping contact moulding machine sand densifying mechanism is characterized in that: after sandbox, strike-off frame filled up molding sand, workbench moved to the below of gas drift together with template, sandbox, strike-off frame, and workbench rises, and closes the moulding chamber; In this process, the shaping contact gives consolidation by deadweight to sand mold upper strata molding sand, and the molding sand that is given consolidation lifts the shaping contact and resets; When moving downward, membrane valve closes when closing the upper port of blast pipe, solenoid directional control valve commutation on the air inlet-outlet pipe, the exhaust of flat quck-opening valve epicoele, when the air pressure in the flat quck-opening valve drops to certain value, because of the pressure reduction valve plate upwards lifts, air communication in the gas inclusion is crossed void channels and is dashed downwards rapidly, and air-flow rushes at the molding sand surface at a high speed by space and the steam vent on the contact around the shaping contact on the one hand, and molding sand is produced gas towards consolidation; Simultaneously, it is downward that high velocity air promotes contact, trails gas and make molding sand be subjected to again the being shaped impact compact of contact behind the consolidation.
The invention has the advantages that: pneumatic pressing and pushing shaping contact sand densifying mechanism at first makes the molding sand in the strike-off frame be subjected to hanging the consolidation that gives of contact in the closed process of moulding chamber, this gives consolidation and helps molding sand to the dark recess filling of sand mold, help gas again and break through the journey formation of real layer just, thereby strengthened the effect of gas towards consolidation.The more important thing is that it utilizes same power-the rush at high velocity air of sandbox dexterously from gas bag, realized the impact compact that gas shock consolidation and gas to molding sand push into the shape contact in same operation.Compare towards moulding with simple gas, it does not need the expense energy that consume more, it moves breath-group, machine productivity is constant, still belong to the high-speed molding process, and real sand effect is significantly improved, gained sand mold compactability height and distribution more become evenly rationally, loose phenomenon when sand mold back molding sand had not both had simple gas towards consolidation, the overvoltage phenomenon of not having the high pressure compression moulding again, reduced the serious waste of pure gas towards the sort of molding sand of moulding, making the sandbox height is the sand mold of 150MM can obtain high-quality in the compound compacting process of pneumatic pressing and pushing shaping contact compacting effect, the sand densifying mechanism and the sand densifying method thereof of capable compacting were compared again after it dashed with external the sort of gas, mechanism is simple, energy consumption is low, the efficient height, real sand is effective.This is a kind of high speed compound sand densifying method and novel sand densifying mechanism of low-consumption high-efficiency.
Below in conjunction with accompanying drawing in detail preferred forms of the present invention is described in detail:
Fig. 1 is the structural representation of moulding machine sand densifying mechanism of the present invention;
Fig. 2 gives consolidation status of processes sketch for moulding machine sand densifying mechanism of the present invention mould assembling;
Fig. 3 is the compound real sand end of a period state sketch of moulding machine sand densifying mechanism pneumatic pressing and pushing of the present invention;
As shown in the figure, moulding machine sand densifying mechanism of the present invention is characterized in that: contain: workbench 9, template 10, apperance 11, sandbox 12, strike-off frame 13, be assigned in the gas drift of workbench 9 tops; Described gas drift contains: gas inclusion 2, port are furnished with air inlet-outlet pipe 3, membrane valve 1, flat quck-opening valve 5, porous bearing 7, the shaping contact 8 of solenoid directional control valve 4; Described flat quck-opening valve 5 is positioned at gas inclusion 2 with porous bearing 7; Porous bearing 7 joins with the gas ram bottom; Flat quck-opening valve 5 is fixedly connected with porous bearing 7; Gas inclusion 2 inner chambers communicate with the cylindricality cavity of porous bearing 7; Air inlet-outlet pipe 3 communicates with last blast pipe 15; The lower port of last blast pipe 15 communicates with flat quck-opening valve 5 epicoeles; The piston on described shaping contact 8 push rod tops and the center cylindricality cavity inner wall of porous bearing 7 are movingly; On shaping contact 8, be provided with steam vent 14; Described membrane valve 1 is assigned in the top of gas inclusion 2 and corresponding with the upper port of last blast pipe 15.
The sand densifying method of the real sand molding machine of pneumatic pressing and pushing shaping contact, it is characterized in that: after sandbox 12, strike-off frame 13 are filled out the end molding sand, workbench 9 moves to the below of gas drift together with template 10, apperance 11, sandbox 12, strike-off frame 13, and workbench rises, and closes the moulding chamber; When membrane valve 1 moves downward the last blast pipe 15 of cutting out flat quck-opening valve 5, solenoid directional control valve 4 commutations on the air inlet-outlet pipe 3, flat quck-opening valve 5 epicoele exhausts, when the air pressure in the flat quck-opening valve 5 drops to certain value, air communication in the gas inclusion 2 is crossed void channels and is dashed downwards rapidly, air-flow rushes at the molding sand surface at a high speed by space and the steam vent on the contact around the shaping contact on the one hand, and molding sand is produced gas towards consolidation; Simultaneously, it is downward that high velocity air promotes contact, trails gas and make molding sand be subjected to again the being shaped impact compact of contact 8 behind the consolidation.
Under the moulding condition for sandbox size 800 * 630 * 300MM, apperance size 640 * 470 * 200MM, the elementary structure parameter of the pneumatic pressing and pushing shaping contact sand densifying mechanism of design is as follows:
Strike-off frame height H=150MM
Worktable lifting height S=230MM
The gas inclusion inside diameter D
0=1100MM, H
0=1300MM
Flat quck-opening valve inside diameter D
1=900, valve plate diameter d
1=896MM
The antipriming pipe internal diameter φ=125mm of porous bearing
The shaping contact is of a size of 790 * 620 * 120mm, N=50mm
Contact travel S
1=90mm, the steam vent that to have 90 diameters on the contact be 30mm.Other structural parameters of moulding machine sand densifying mechanism are basic identical towards the prior art of moulding machine with simple gas.
Its compacting process is as follows: when the sandbox 12 that fills up molding sand, strike-off frame 13 entered gas drift below together in company with template 10, workbench 9, shaping contact 8 freely hung on gas drift below, as shown in Figure 1.Close in the process of moulding chamber when workbench rises, suspension type shaping contact acts on the loose molding sand by its deadweight, makes molding sand produce certain consolidation that gives, and makes the oriented trend that moves and fill of the upper strata molding sand that is positioned at the strike-off frame middle part all around.When molding sand gives consolidation when acquiring a certain degree, when promptly giving the gross pressure of consolidation stress vertical direction and contact dead-weight balanced, contact is lifted.When the lower plane driving fit of the last plane of strike-off frame and gas drift, sand densifying mechanism enters gas towards preceding state, as shown in Figure 2.At this moment, molding sand has had certain degree of packing of giving, and certain first real layer has been formed at sand mold top, and this is very favourable towards the effect of real sand to strengthening gas.At this moment, gas inclusion 2 interior reaching on the flat quck-opening valve 5 all are in gas under operating pressure.When moving downward, membrane valve 1 closes when closing blast pipe, solenoid directional control valve 4 commutations of air inlet-outlet pipe, quck-opening valve 5 epicoele exhausts, when the air pressure in the flat quck-opening valve drops to certain value, operating air pressure in the gas inclusion lifts flap type 6 fast, quck-opening valve is opened, air communication in the gas inclusion is crossed void channels and is dashed downwards rapidly, air-flow rushes at the molding sand surface at a high speed by space and the steam vent on the contact around the shaping contact on the one hand, molding sand is produced gas towards consolidation, simultaneously, it is downward that high velocity air promotes contact, trails gas and make molding sand be subjected to again the being shaped impact compact of contact behind the consolidation.The compound real sand end of a period state of pneumatic pressing and pushing such as Fig. 3 show.
Claims (2)
1, a kind of pneumatic pressing and pushing shaping contact moulding machine sand densifying mechanism is characterized in that: contain: workbench (9), template (10), apperance (11), sandbox (12), strike-off frame (13), be assigned in the gas drift of workbench (9) top; Described gas drift contains: gas inclusion (2), port are furnished with air inlet-outlet pipe (3), membrane valve (1), flat quck-opening valve (5), porous bearing (7), the shaping contact (8) of solenoid directional control valve (4); Described flat quck-opening valve (5) is positioned at gas inclusion (2) with porous bearing (7); Porous bearing (7) joins with the gas ram bottom; Flat quck-opening valve (5) is fixedly connected with porous bearing (7); Gas inclusion (2) inner chamber communicates with the cylindricality cavity of porous bearing (7); Air inlet-outlet pipe (3) communicates with last blast pipe (15); The lower port of last blast pipe (15) communicates with flat quck-opening valve (5) epicoele; The piston on described shaping contact (8) push rod top and the center cylindricality cavity inner wall of porous bearing (7) are movingly; On shaping contact (8), be provided with steam vent (14); Described membrane valve (1) is assigned in the top of gas inclusion (2) and corresponding with the upper port of last blast pipe (15).
2, the sand densifying method of pneumatic pressing and pushing shaping contact moulding machine sand densifying mechanism according to claim 1, it is characterized in that: after sandbox (12), strike-off frame (13) fill up molding sand, workbench (9) moves to the below of gas drift together with template (10), sandbox (12), strike-off frame (13), workbench rises, and closes the moulding chamber; In this process, the shaping contact gives consolidation by deadweight to sand mold upper strata molding sand, and the molding sand that is given consolidation lifts the shaping contact and resets; When moving downward, membrane valve (1) closes when closing the upper port of blast pipe (15), solenoid directional control valve (4) commutation on the air inlet-outlet pipe (3), flat quck-opening valve (5) epicoele exhaust, when the air pressure in the flat quck-opening valve (5) drops to certain value, because of pressure reduction valve plate (6) upwards lifts, air communication in the gas inclusion (2) is crossed void channels and is dashed downwards rapidly, and air-flow rushes at the molding sand surface at a high speed by space and the steam vent on the contact around the shaping contact on the one hand, and molding sand is produced gas towards consolidation; Simultaneously, it is downward that high velocity air promotes contact, trails gas and make molding sand be subjected to again the being shaped impact compact of contact (8) behind the consolidation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00110059A CN1092089C (en) | 2000-01-26 | 2000-01-26 | Sand densifying mechanism and method for molding machine with pneumatic pressing and pushing contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00110059A CN1092089C (en) | 2000-01-26 | 2000-01-26 | Sand densifying mechanism and method for molding machine with pneumatic pressing and pushing contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1306892A true CN1306892A (en) | 2001-08-08 |
| CN1092089C CN1092089C (en) | 2002-10-09 |
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ID=4580083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00110059A Expired - Fee Related CN1092089C (en) | 2000-01-26 | 2000-01-26 | Sand densifying mechanism and method for molding machine with pneumatic pressing and pushing contact |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527948A (en) * | 2012-03-06 | 2012-07-04 | 刘连忠 | Four-station static pressure automatic moulding machine |
| CN102680291A (en) * | 2012-04-25 | 2012-09-19 | 西南科技大学 | Electromagnetically controlled soil sample compactor |
| CN104190877A (en) * | 2014-09-22 | 2014-12-10 | 江铃汽车股份有限公司 | Molding sand compacting device |
| CN106903269A (en) * | 2017-02-21 | 2017-06-30 | 合肥海琛科技服务有限公司 | Pneumatic flushing moulding machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2273631Y (en) * | 1996-08-16 | 1998-02-04 | 陈福泽 | Hanging and multi-head shock compacting mechanism of air-shocking moulding machine |
| CN1180595A (en) * | 1996-10-18 | 1998-05-06 | 机械工业部第四设计研究院 | Contact type power impact modelling and moulding machine |
-
2000
- 2000-01-26 CN CN00110059A patent/CN1092089C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527948A (en) * | 2012-03-06 | 2012-07-04 | 刘连忠 | Four-station static pressure automatic moulding machine |
| CN102527948B (en) * | 2012-03-06 | 2013-09-11 | 刘连忠 | Four-station static pressure automatic moulding machine |
| CN102680291A (en) * | 2012-04-25 | 2012-09-19 | 西南科技大学 | Electromagnetically controlled soil sample compactor |
| CN102680291B (en) * | 2012-04-25 | 2014-10-22 | 西南科技大学 | Electromagnetically controlled soil sample compactor |
| CN104190877A (en) * | 2014-09-22 | 2014-12-10 | 江铃汽车股份有限公司 | Molding sand compacting device |
| CN104190877B (en) * | 2014-09-22 | 2016-10-05 | 江铃汽车股份有限公司 | A kind of molding sand mold compacting device |
| CN106903269A (en) * | 2017-02-21 | 2017-06-30 | 合肥海琛科技服务有限公司 | Pneumatic flushing moulding machine |
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| Publication number | Publication date |
|---|---|
| CN1092089C (en) | 2002-10-09 |
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| C06 | Publication | ||
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Granted publication date: 20021009 Termination date: 20100228 |