CN101869975A - Method for casting sand mould by utilizing vacuum-assist pouring - Google Patents
Method for casting sand mould by utilizing vacuum-assist pouring Download PDFInfo
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- CN101869975A CN101869975A CN 201010219245 CN201010219245A CN101869975A CN 101869975 A CN101869975 A CN 101869975A CN 201010219245 CN201010219245 CN 201010219245 CN 201010219245 A CN201010219245 A CN 201010219245A CN 101869975 A CN101869975 A CN 101869975A
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Abstract
The invention relates to a method for casting sand mould by utilizing vacuum-assist pouring. The technological process thereof includes: the sand mould after moulding, modelling, core setting and mould assembling is placed above a vacuum purification smoke pouring table, a vacuum system is started, negative pressure is applied to the sand mould by virtue of the vacuum purification smoke pouring table, liquid steel is injected into the sand mould by a pouring cup and then solidified, thus the casting process is completed. In the invention, the sand mould is in negative pressure state before pouring, when liquid metal enters into the cavity, sand core and the sand mould can produce gas under the action of high temperature liquid metal, and negative pressure can cause the produced gas to be exhausted at any time, especially the sand core gradually coated in the liquid metal exhausts the gas by virtue of a plurality of core prints, and the whole operation process can be carried out in safe and stable state.
Description
Technical field
The present invention relates to a kind of casting method of utilizing the vacuum-assist pouring sand mold.
Background technology
The conventional method of sand casting when cast is to utilize gravity principle to inject die cavity by the sandbox top liquid metal, and i.e. cast finished after die cavity was full of liquid metal.It is to realize easily that general cast member utilizes the gravity principle castable, but it is just difficult to be close to sealed hollow for the foundry goods that cavity is arranged, particularly shape.At first to make core, will consider during coremaking that high temperature fluent metal makes the gas that the time spent produces to core and can discharge smoothly, also will consider the problem of shaking out in the cavity according to the shape of cavity.Usually the way that is adopted is to set up some core prints on core, and the gas that is produced when being beneficial to pour into a mould enters atmosphere, and the blowhole that is formed by core print can be discharged core sand as clearance hole when sand removal simultaneously.Bonding agent is adhesion-molded with core sand because core utilizes organic or inorganic, so can produce a large amount of gases under the high temperature fluent metal effect, the main source one of these gases is binding agents, the 2nd, core sand itself.If the gas that high temperature produces in the casting process can not be discharged smoothly, then can cause the sand mold fire of choking, the liquid metal vigorous splash during, pouring practice can not be proceeded, and finally causes to stop watering foundry goods is scrapped.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned pouring technology, provide a kind of and gas can be discharged in casting process, liquid metal can splash, the casting method of utilizing the vacuum-assist pouring sand mold that pouring practice can safety and steady be carried out.
For achieving the above object, the present invention adopts following technical proposals:
A kind of casting method of utilizing the vacuum-assist pouring sand mold, its technical process is: will be placed into the vacuum purified smoke casting table top through the sandbox after molding, moulding, following core and the mould assembling, open vacuum system, by vacuum purified smoke casting table sandbox is imposed negative pressure, molten steel is injected by cup promptly finishes casting process after sand mold solidifies;
Described molding is meant that cavity is formed by core according to foundry goods shape modeling;
Described moulding is meant puts into sandbox with model and running gate system, inserts molding sand, molding behind the sand mold consolidation;
Described core down is meant and is placed in the die cavity forming the core of inner core and the core of formation cavity;
Described core one side is provided with the core print that core is communicated with sand mold;
Described mould assembling is meant that the sandbox that will make type fastens, and the sandbox top cover is put cup with plastic sheeting above running gate system;
The above-mentioned sandbox slit gluing sealing that is placed on the vacuum purified smoke casting table;
Described vacuum purified smoke casting table comprises the metal cabinet at a band end, is provided with several discharges in this metal cabinet, and discharge one end is connected with gathering to manage, and gathers to be connected with the exhaust tube that is communicated with the vacuum feeder on the pipe;
Be coated with woven wire on the described discharge.
The present invention makes sand mold be in negative pressure state before cast, after liquid metal enters die cavity, core and sand mold can produce gas under the effect of high temperature fluent metal, and negative pressure can make the gas of generation discharge at any time, the core that particularly is covered by gradually among the liquid metal will lean on some core prints to discharge gas entirely, and the entire job process can be carried out under the safety and steady state.
The method of casting sand mould is applicable to the production of ferrous metal and non-ferrous casting under the negative pressure state of the present invention.The present invention is for promoting the casting industry environmental improvement to have crucial meaning, the pernicious gas that sand mold produced that utilizes vacuum-assist pouring enters atmosphere after purifying through the vacuum system gas and water separator, therefore the gas of discharging is clean, very little to the harm that environment causes, workshop can not fill the air smog and pernicious gas, can realize cleaner production.
Description of drawings
Fig. 1 is the structure diagram of water flowing blanking column;
Fig. 2 is a water flowing blanking column side cutaway view;
Fig. 3 is a water flowing blanking column top plan view;
Fig. 4 is water flowing blanking column manufacture method figure;
Fig. 5 is the vacuum-assist pouring schematic diagram;
Fig. 6 is the structure chart of vacuum purified smoke casting table;
Fig. 7 is the vertical view of vacuum purified smoke casting table;
Fig. 8 is the operating position figure of vacuum purified smoke casting table.
The specific embodiment
Vacuum purified smoke casting table of the present invention, comprise a metal cabinet 15-1 that the end is arranged, in this metal cabinet 15-1, be provided with several discharges 15-2, the end of all discharge 15-2 all with gather pipe 15-3 and be connected, be connected with the exhaust tube 15-4 that can be connected gathering to manage on the 15-3 with the vacuum feeder.Above-mentioned metal cabinet 15-1, discharge 15-2, gather pipe 15-3 and exhaust tube 15-4, all adopt metal material by welding to become one.Being coated with woven wire 15-5 in the outside of discharge 15-2, is system to be worked the mischief with in the sand grains suction pipeline in order to prevent when bleeding.
During use, with the dry loose sand 16 of packing in teeming stage 15 cavitys, compacting, strickling.Be put on the teeming stage 15 loose sand faces behind sandbox (being sand mold) is 8 fastening, the top seal, between case and the platform with plastic sheeting 17 sealings.Open vacuum suction device, be vacuum state in the sandbox 8.Liquid metal enters die cavity by watering cup 14, and die cavity is full of the back teeming stage and finishes using.
Selecting cast steel water flowing blanking column product below for use is that typical foundry goods is elaborated:
Cast steel water flowing blanking column 1 profile is an oblate cylindrical shell, and an annular cooling water cavity 4 is arranged on the cylindrical shell, and some confining tendon sheets 5 are arranged in the cavity, is used to increase the cooling water flow backhaul, improves cooling effect.Cooling water is entered by pipe 2 during use, is flowed out by pipe 3 around one week of cylindrical shell.
The concrete casting technique of above-mentioned cast steel blanking column is:
A. molding, according to blanking column shape modeling 6, cavity 4 is formed by core 7;
B. moulding is put into sandbox 8 with model 6 and running gate system 9, inserts molding sand 10, molding behind the sand mold consolidation;
C. play core, be placed in the die cavity forming the core 12 of inner core and the core of formation cavity 7.In order to ventilate and to shake out, be provided with core print 11 in core 7 one sides, core is communicated with sand mold, so that when vacuum-assist pouring, ventilate, when cleaning, shake out;
D. mould assembling fastens the sandbox of having made type, and the sandbox top cover is put cup 14 with plastic sheeting 13 above running gate system 9;
E. cast is placed in vacuum purified smoke casting table 15 tops with sandbox 8, and vacuum system is opened in gluing sealing in sandbox slit, by vacuum purified smoke casting table sandbox is imposed negative pressure, and molten steel injects sand mold by cup 14.Enter atmosphere because the high temperature action of molten steel can produce a large amount of escaping gases in the sand mold after all being purified by the gas and water separator in the vacuum system this moment.After molten steel solidifies in sand mold, promptly be required foundry goods.
Claims (9)
1. casting method of utilizing the vacuum-assist pouring sand mold, its technical process is: will be placed into vacuum purified smoke casting table (15) top through the sandbox (8) after molding, moulding, following core and the mould assembling, open vacuum system, by vacuum purified smoke casting table (15) sandbox is imposed negative pressure, molten steel is injected by cup (14) promptly finishes casting process after sand mold solidifies.
2. according to the described casting method of utilizing the vacuum-assist pouring sand mold of claim 1, it is characterized in that: described molding is meant that cavity is formed by core according to foundry goods shape modeling.
3. according to the described casting method of utilizing the vacuum-assist pouring sand mold of claim 1, it is characterized in that: described moulding is meant puts into sandbox (8) with model and running gate system, inserts molding sand (1), molding behind the molding sand consolidation.
4. according to the described casting method of utilizing the vacuum-assist pouring sand mold of claim 1, it is characterized in that: described core down is meant and is placed in the die cavity forming the core (12) of inner core and the core (7) of formation cavity.
5. according to the described casting method of utilizing the vacuum-assist pouring sand mold of claim 4, it is characterized in that: described core one side is provided with the core print (11) that core is communicated with sand mold.
6. according to the described casting method of utilizing the vacuum-assist pouring sand mold of claim 1, it is characterized in that: described mould assembling is meant that the sandbox (8) that will make type fastens, the sandbox top cover is put cup (14) with plastic sheeting (13) in the top of running gate system (9).
7. according to the described casting method of utilizing the vacuum-assist pouring sand mold of claim 1, it is characterized in that: the above-mentioned sandbox slit gluing sealing that is placed on the vacuum purified smoke casting table.
8. according to claim 1 or the 7 described casting methods of utilizing the vacuum-assist pouring sand mold, it is characterized in that: described vacuum purified smoke casting table comprises the metal cabinet (15-1) at a band end, be provided with several discharges (15-2) in this metal cabinet (15-1), discharge (15-2) end with gather pipe (15-3) and be connected, gather and be connected with the exhaust tube (15-4) that is communicated with the vacuum feeder on the pipe (15-3).
9. according to the described vacuum purification flue gas of claim 8 vacuum purified smoke casting table, it is characterized in that: be coated with woven wire (15-5) on the described discharge (15-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010219245 CN101869975A (en) | 2010-07-07 | 2010-07-07 | Method for casting sand mould by utilizing vacuum-assist pouring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010219245 CN101869975A (en) | 2010-07-07 | 2010-07-07 | Method for casting sand mould by utilizing vacuum-assist pouring |
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| CN101869975A true CN101869975A (en) | 2010-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010219245 Pending CN101869975A (en) | 2010-07-07 | 2010-07-07 | Method for casting sand mould by utilizing vacuum-assist pouring |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102896299A (en) * | 2012-09-28 | 2013-01-30 | 河北科技大学 | Production technology for casting thin-wall cookware through using precoated sand hot box method |
| CN102997687A (en) * | 2012-12-24 | 2013-03-27 | 姚会元 | Bottom ring for submerged arc furnace and manufacturing method thereof |
| CN103196295A (en) * | 2013-04-02 | 2013-07-10 | 姚会元 | Contact element for submerged arc furnace electric conduction and manufacturing method thereof |
| CN103341592A (en) * | 2013-07-03 | 2013-10-09 | 黄山泰鑫耐磨材料有限公司 | Laminating sand mould vacuum-assist pouring method and system |
| CN107107180A (en) * | 2015-01-15 | 2017-08-29 | 日产自动车株式会社 | Low-pressure casting method and low-pressure casting apparatus |
| WO2018045809A1 (en) * | 2016-09-07 | 2018-03-15 | 上海华培动力科技股份有限公司 | Adjusted pressure casting method for producing black metal cast |
| CN112916848A (en) * | 2021-01-26 | 2021-06-08 | 康硕(山西)智能制造有限公司 | Aluminum alloy lost foam casting system |
| CN115533083A (en) * | 2022-09-19 | 2022-12-30 | 中国第一汽车股份有限公司 | Negative pressure device for removing gas of metal gravity casting water jacket sand core |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1139157A (en) * | 1995-06-28 | 1997-01-01 | 湖南省株洲洗煤厂 | Alloying technology for casting surface |
| JP2000005865A (en) * | 1998-06-22 | 2000-01-11 | Chuo Motor Wheel Co Ltd | Method and device for suction casting |
| CN1555947A (en) * | 2004-01-06 | 2004-12-22 | 王一诚 | Sand mould negative pressure gravity casting method |
| US7500507B2 (en) * | 2004-04-01 | 2009-03-10 | Sintokogio, Ltd. | Method and device for pouring molten metal in vacuum molding and casting |
-
2010
- 2010-07-07 CN CN 201010219245 patent/CN101869975A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1139157A (en) * | 1995-06-28 | 1997-01-01 | 湖南省株洲洗煤厂 | Alloying technology for casting surface |
| JP2000005865A (en) * | 1998-06-22 | 2000-01-11 | Chuo Motor Wheel Co Ltd | Method and device for suction casting |
| CN1555947A (en) * | 2004-01-06 | 2004-12-22 | 王一诚 | Sand mould negative pressure gravity casting method |
| US7500507B2 (en) * | 2004-04-01 | 2009-03-10 | Sintokogio, Ltd. | Method and device for pouring molten metal in vacuum molding and casting |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102896299A (en) * | 2012-09-28 | 2013-01-30 | 河北科技大学 | Production technology for casting thin-wall cookware through using precoated sand hot box method |
| CN102997687A (en) * | 2012-12-24 | 2013-03-27 | 姚会元 | Bottom ring for submerged arc furnace and manufacturing method thereof |
| CN103196295A (en) * | 2013-04-02 | 2013-07-10 | 姚会元 | Contact element for submerged arc furnace electric conduction and manufacturing method thereof |
| CN103341592A (en) * | 2013-07-03 | 2013-10-09 | 黄山泰鑫耐磨材料有限公司 | Laminating sand mould vacuum-assist pouring method and system |
| CN107107180A (en) * | 2015-01-15 | 2017-08-29 | 日产自动车株式会社 | Low-pressure casting method and low-pressure casting apparatus |
| CN107107180B (en) * | 2015-01-15 | 2022-03-29 | 日产自动车株式会社 | Low-pressure casting method and low-pressure casting device |
| WO2018045809A1 (en) * | 2016-09-07 | 2018-03-15 | 上海华培动力科技股份有限公司 | Adjusted pressure casting method for producing black metal cast |
| CN112916848A (en) * | 2021-01-26 | 2021-06-08 | 康硕(山西)智能制造有限公司 | Aluminum alloy lost foam casting system |
| CN115533083A (en) * | 2022-09-19 | 2022-12-30 | 中国第一汽车股份有限公司 | Negative pressure device for removing gas of metal gravity casting water jacket sand core |
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Application publication date: 20101027 |