CN101837429A - Carbon dioxide hardened sodium silicate sand swage sand shooting modeling method - Google Patents
Carbon dioxide hardened sodium silicate sand swage sand shooting modeling method Download PDFInfo
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- CN101837429A CN101837429A CN201010188566A CN201010188566A CN101837429A CN 101837429 A CN101837429 A CN 101837429A CN 201010188566 A CN201010188566 A CN 201010188566A CN 201010188566 A CN201010188566 A CN 201010188566A CN 101837429 A CN101837429 A CN 101837429A
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Abstract
The invention discloses a carbon dioxide hardened sodium silicate sand swage sand shooting modeling method which comprises the following steps of: shooting sodium silicate sand into a cavity formed between a template and a swage by sand shooting holes on the template to form a shell in the cavity; blowing carbon dioxide gas into the cavity by the sand shooting holes on the template and exhaust holes used for exhausting on the template to carry out hardening treatment; separating the template and the swage; and delivering the hardened shell and the swage together into a casting field to carry out casting treatment.
Description
Technical field
The present invention relates to foundry goods moulding field, relate in particular to a kind of carbon dioxide hardened sodium silicate sand swage sand shooting modeling method.
Background technology
The foundry goods moulding is the critical process in the foundry goods forming process, and it all has crucial influence to aspects such as the quality of foundry goods, manufacturing cost, production efficiency, environmental pollutions.
In traditional foundry goods formative method, at first template is heated to 180-250 ℃, be buckled on the swage; Then, utilize Compressed Gas, usually be blown in the space (being die cavity) between template and the iron film as the molding sand of adhesive by organic resin with a kind of; Then, the molding sand in the space is blown into sclerosis gas and makes its sclerosis, forms shell; Template and swage are separated with shell, again shell is transported to the cast etc. to be cast.Above-mentioned shell formative technology, one of its main points are to adopt organic resin sand as molding sand, and two of main points are that template is through heating; Three of main points are that shell is directly used in cast.But in actual applications, this traditional foundry goods formative method has demonstrated many shortcomings, at first: shell is directly used in cast, mould strength is difficult for guaranteeing, in order to improve the intensity of shell, must improve the addition of binding agent, simultaneously because molding sand material itself costs an arm and a leg, so, adopt this technology, the material cost height; Secondly: template needs heating, the temperature of template radiation makes that easily the molding sand that is injected in the mould hardens prematurely, cause the obstruction of sand-spraying hole, thereby make molding sand can't fill mould in accordance with regulations fully, equably, defectives such as rough surface, chill mark and pit may appear in the foundry goods that utilizes its shell of producing to cast, and heating needs to consume a large amount of electric energy to template; And described organic resin sand can produce gases such as poisonous formaldehyde, phenol, ammonia in making casting mold and casting process, to workman's healthy harmful and contaminated environment.
The another kind of foundry goods formative method that adopts waterglass as the molding sand of adhesive at first, is placed on (described sandbox is a metal frame of being made up of four faces, and upper and lower surface does not have metal) on the template with sandbox; Then (gravity adds sand) in water-glass sand (waterglass adds in the roughing sand as binding agent) the adding sandbox also used the vibration mode consolidation; Then, template is separated with casting mold, described casting mold is the combination of molding sand and sandbox; Again the carbon dioxide gas blow pipe is inserted in the casting mold, be blown into carbon dioxide, make the binding agent sclerosis in the casting mold, thereby make casting mold reach certain intensity and hardness; At last, it is to be cast the casting mold after the sclerosis to be transported into cast place etc.The traditional design method of the carbon dioxide hardened glass sand of this employing has very big advantage, and it shows as: by feed carbon dioxide in molding sand, can realize the sclerosis of molding sand under the condition that need not to heat; And its source of molding sand is very extensive, cheap; What is more important utilizes waterglass to be steam as the product of casting mold in casting process of the molding sand formation of adhesive, and is free from environmental pollution.But, intensity in order to ensure casting mold, must in molding sand, add a large amount of waterglass, thereby increased material cost on the one hand, this makes the collapsibility of molding sand poor (collapsibility is its key in application link of restriction) on the other hand, promptly molding sand is difficult for fragmentation behind casting pouring, thereby has increased casting cleaning workload and sand work of treatment amount.The increase of cleaning work amount has increased disposal costs, and in the process of cleaning and sand processing, can produce a large amount of harmful silica dust.
Summary of the invention
This provides a kind of carbon dioxide hardened sodium silicate sand swage sand shooting modeling method, and the quality of production in the prior art is poor in order to solve, the defective of cost height, complex process, contaminated environment, realizes the foundry goods formative method of a kind of high-quality, low cost and environmental protection.
The embodiment of the invention provides a kind of carbon dioxide hardened sodium silicate sand swage sand shooting modeling method, may further comprise the steps:
By the sand-spraying hole on the template, formed die cavity is injected water-glass sand between described template and swage, to form shell in described die cavity;
By being used for the steam vent of exhaust on sand-spraying hole on the described template and the described template, in described die cavity, be blown into carbon dioxide described shell is carried out cure process;
Separate described template and described swage, and will together send into the cast field through the shell of cure process and described swage and pour into a mould processing.
The carbon dioxide hardened sodium silicate sand swage sand shooting modeling method of the embodiment of the invention, can bring following beneficial effect: owing to adopt water-glass sand as molding sand, template does not need heating, power consumption is little, and be applicable to the production of steel part, avoided the issuable rough surface of use organic resin sand, wrinkle and pit defect; Shell does not separate with swage during cast, and the intensity of casting mold is improved, and has guaranteed the quality of casting mold; Because the intensity of casting mold mainly guarantees by swage, the amount of being blown into of the addition of waterglass and carbon dioxide can significantly reduce in the molding sand, improved the collapsibility of water-glass sand, casting cleaning workload and casting cleaning cost have been alleviated, and because roughing sand is cheap, the material cost of Jiang Diing greatly; Because what adopt is that carbon dioxide hardened glass sand and waterglass consumption are few, so can not produce harmful gas, helps the healthy of environmental protection and workman.This method has realized the foundry goods formative method of high-quality, low cost and environmental protection.
Description of drawings
Fig. 1 is the flow chart of carbon dioxide hardened sodium silicate sand swage sand shooting modeling method embodiment of the present invention;
Fig. 2 a to 2d carries out formative technology process schematic diagram for using embodiment of the invention carbon dioxide hardened sodium silicate sand swage sand shooting modeling method.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail.
Fig. 1 is the flow chart of carbon dioxide hardened sodium silicate sand swage sand shooting modeling method embodiment of the present invention.As shown in Figure 1, this method comprises:
Template comprises baffle plate and apperance two parts, swage inside has and the corresponding shape of apperance, when described template and swage are combined, formed shape and apperance corresponding " gap " between the two, should " gap " be the die cavity that is used to form shell.Template is provided with sand-spraying hole, goes into water-glass sand via this sand-spraying hole to described die cavity injection, thereby forms shell.
Step 200 by being used for the steam vent of exhaust on sand-spraying hole on the described template and the described template, is blown into carbon dioxide described shell is carried out cure process in described die cavity;
For making described shell reach certain intensity and hardness, need in die cavity, feed carbon dioxide.Be used to penetrate the sand-spraying hole of sand except that being provided with on the described template, also be provided with the steam vent that is used for exhaust, the water-glass sand shell that forms in to described die cavity carries out in the hardening process, and required carbon dioxide is injected in the described die cavity by sand-spraying hole on the described template and steam vent.
After shell sclerosis, template is separated with swage, and the shell after will harden to stay in the described swage, the two whole formation casting mold to be cast can be delivered to this casting mold the appointment place afterwards, waits pending cast.
Carbon dioxide hardened sodium silicate sand swage sand shooting modeling method according to the foregoing description, because this embodiment adopts water-glass sand as molding sand, the power consumption of having avoided using organic resin sand to be brought is big, cost is high, contaminated environment and may produce defectives such as rough surface, wrinkle and pit; And form casting mold by shell and the two integral body of swage during cast, make the intensity of casting mold be improved, guaranteed the quality of casting mold; And because the intensity of casting mold mainly guarantees by swage, the amount of being blown into of the addition of waterglass and carbon dioxide can significantly reduce in the molding sand, thereby reduced material cost on the one hand, what is more important, improve the collapsibility of water-glass sand, alleviated casting cleaning workload and casting cleaning cost.In addition; because the carbon dioxide hardened glass sand that adopts does not generate toxic gas in casting process; and utilize the waterglass consumption of the described method of the embodiment of the invention few; avoided in scale removal process producing harmful gas, so the method for this embodiment helps protecting, and environment and workman's is healthy.
Fig. 2 a to 2d carries out formative technology process schematic diagram for using embodiment of the invention carbon dioxide hardened sodium silicate sand swage sand shooting modeling method.
Fig. 2 a shows the processing step that forms die cavity between template and the swage.Shown in Fig. 2 a, template 1 is made up of baffle plate 1a and apperance 1b, and template 1 is provided with template sand-spraying hole 11, template steam vent 12 and is arranged on venting plug 13 on this template steam vent.Has corresponding shape in the swage 2 with apperance 1b.Before gang form 1 and swage 2, on the apperance 1b of this template, spray parting compound, so that more easy to this template behind the shell that forms sclerosis with separating of swage.Then template 1 is placed on the swage 2 and (or swage 2 is placed on the template 1, decide on concrete technology), the apperance of this template is partly placed in the swage 2, thereby form " gap " between the apperance of template 1 part and the swage 2, should " gap " be the die cavity 3 that is used to form shell.
Fig. 2 b shows water-glass sand is injected processing step in the die cavity 3.Shown in Fig. 2 b, penetrating sand plate 4 is the devices that are used for molding sand is injected die cavity 3.Penetrate sand plate 4 and be provided with many apertures, wherein a part is to penetrate sand plate sand-spraying hole 41, and another part is to penetrate sand plate steam vent 42.To penetrate sand plate 4 and be placed on the template 1, and make on it penetrate sand plate sand-spraying hole 41 and penetrate sand plate steam vent 42 respectively with template 1 on template sand-spraying hole 11, template steam vent 12 corresponding one by one.
Penetrate sand plate 4 and be used to store the sand storage bin (not shown) for the treatment of the jetting glass sand and fit together, move with sand storage bin.This sand storage bin is connected with the compressed air source (not shown).When beginning to penetrate sand, open the Compressed Gas valve, compressed air enters in the sand storage bin rapidly, pass the layer of sand space and promote sand grains, form the sand air-flow, under compressed-air actuated effect, water-glass sand is injected die cavity 3 at a high speed via penetrating sand plate sand-spraying hole 41, obtains consolidation in filling die cavity 3.The water-glass sand of injecting forms unhardened shell 31 in die cavity 3.
Penetrate in the sand process, when water-glass sand was injected die cavity 3, compressed air was also injected in the die cavity 3, and it is discharged via the sand plate steam vent of penetrating on the sand plate 4 42 of penetrating.
Preferably, after the compressed air drive water-glass sand of injecting flow to template steam vent 12, this water-glass sand stops to stay by the filter that is provided with on the template steam vent and is used to form unhardened shell 31 in the die cavity 3, compressed air via this filter and template steam vent 12, penetrate sand plate steam vent 42 and discharge die cavities 3.Wherein, this filter can be venting plug 13, and venting plug 13 is a kind of netted exhaust apparatus.
Fig. 2 c shows and feed carbon dioxide in shell, makes the processing step of unhardened shell 31 sclerosis.Shown in Fig. 2 c, this step is firm and hard existing by blowing.Penetrate after sand action finishes, will penetrate sand plate 4 and remove from template 1.Air blowing plate 5 is placed on the template 1.Air blowing plate 5 is provided with many gas holes, when air blowing plate 5 is placed on the template 1, makes gas hole corresponding with template steam vent 12, template sand-spraying hole 11 on the template 1.This air blowing plate links to each other with a carbon dioxide air source (not shown).Behind the carbon dioxide air source valve open, carbon dioxide enters die cavity by the template steam vent 12 on the gas hole on the air blowing plate 5, the template 1, template sand-spraying hole 11, chemical reaction takes place with the binding agent (being waterglass) in the water-glass sand, make its curing, thereby make unhardened shell 31 reach certain intensity and hardness, thereby form the shell 32 that has hardened.
Fig. 2 d shows template 1 and swage 2 separation processes steps.Shown in Fig. 2 d, after unhardened shell 31 is hardened, template 1 and swage 2 are separated, and the shell 32 that will harden is stayed in the swage 2 casting mold that the two whole conduct is used to pour into a mould.It is to be cast that resulting casting mold is delivered to cast place etc.
Formative method according to above-mentioned technical process, water-glass sand is injected in the processing step in the die cavity 3 shown in Fig. 2 b, utilization penetrate sand plate 4, with penetrate sand storage bin that the sand plate combines and the compressed air source that links to each other with this sand storage bin, make water-glass sand inject in the die cavity at a high speed, in the filling die cavity, obtain consolidation, thus increased shell density, improved the quality of shell; And, water-glass sand is injected in the processing step in the described die cavity shown in Fig. 2 b, the filter that the compressed air of injecting was provided with on template steam vent 12 before discharging die cavity 3 via steam vent filters, can avoid the waste of material that loss caused of water-glass sand on the one hand, can avoid waterglass to enter the obstruction that steam vent causes steam vent on the other hand.
Carbon dioxide hardened sodium silicate sand swage sand shooting modeling method according to the foregoing description, both solve problems such as the existing power consumption of use organic resin sand is big, cost is high, contaminated environment, production casting quality difference, avoided generating in the existing casting cleaning difficulty of the carbon dioxide hardened glass sand of use, disposal costs height, the scale removal process problems such as pernicious gas again.And, by adopting the method among this embodiment, on the one hand, because when cast forms casting mold by the two integral body of shell and swage, make the intensity of casting mold be improved, guaranteed the quality of casting mold; On the other hand,, make the shell density that obtains big and even, thereby guaranteed to utilize the quality of its final casting mold institute pouring cast part owing to go into water-glass sand to the die cavity injection by compressed-air actuated effect.It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (5)
1. carbon dioxide hardened sodium silicate sand swage sand shooting modeling method is characterized in that comprising:
By the sand-spraying hole on the template, formed die cavity is injected water-glass sand between described template and swage, to form shell in described die cavity;
By being used for the steam vent of exhaust on sand-spraying hole on the described template and the described template, in described die cavity, be blown into carbon dioxide described shell is carried out cure process;
Separate described template and described swage, and will together send into the cast field through the shell of cure process and described swage and pour into a mould processing.
2. formative method according to claim 1, it is characterized in that, described by the sand-spraying hole on the template, formed die cavity is injected water-glass sand and is specifically comprised between described template and swage: make up described template and described swage, to form described die cavity between described template and described swage;
The sand plate of penetrating that is assembled with sand storage bin is placed on the described template, and described to penetrate the sand plate corresponding with steam vent with the sand-spraying hole on the described template;
Produce compressed air by blast apparatus described water-glass sand is injected in the described die cavity via described sand-spraying hole, the compressed air of injecting is discharged via described steam vent.
3. formative method according to claim 2 is characterized in that, the described compressed air of injecting is discharged via described steam vent and specifically comprised:
After the compressed air of injecting drove described water-glass sand and flow to described steam vent, described water-glass sand is stopped by the filter that is provided with on the described steam vent to be stayed in the described die cavity, and compressed air is discharged described die cavity via described filter and described steam vent.
4. formative method according to claim 2 is characterized in that, before described template of described combination and the described swage, also comprises:
On the described template, with the apperance of the corresponding setting of described swage shape on, spray parting compound.
5. formative method according to claim 1 is characterized in that, and is described by being used for the steam vent of exhaust on sand-spraying hole on the described template and the described template, is blown into carbon dioxide and described shell is carried out cure process specifically comprises in described die cavity:
Separate described sand plate and the described template of penetrating, the air blowing plate is placed on the described template, make several gas holes on the described air blowing plate corresponding with steam vent with the sand-spraying hole on the described template;
In described die cavity, be blown into carbon dioxide by described gas hole, in order to described shell is carried out cure process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101885663A CN101837429B (en) | 2010-05-31 | 2010-05-31 | Carbon dioxide hardened sodium silicate sand swage sand shooting modeling method |
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| CN2010101885663A CN101837429B (en) | 2010-05-31 | 2010-05-31 | Carbon dioxide hardened sodium silicate sand swage sand shooting modeling method |
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| CN101837429A true CN101837429A (en) | 2010-09-22 |
| CN101837429B CN101837429B (en) | 2012-07-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109047647A (en) * | 2018-09-18 | 2018-12-21 | 大连科承铸造装备科技有限公司 | A kind of swage water-glass sand covers type precise forming process |
| CN109290513A (en) * | 2018-09-18 | 2019-02-01 | 大连科承铸造装备科技有限公司 | A kind of environmental protection water-glass sand shell mold process |
| WO2020208227A1 (en) * | 2019-04-11 | 2020-10-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | System and method for producing a casting mould |
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| GB886328A (en) * | 1958-12-30 | 1962-01-03 | Sarl Doittau Produits Metallur | Improvements in and relating to methods for preparing mouldable exothermic products |
| SU801970A1 (en) * | 1978-03-27 | 1981-02-07 | Всесоюзный Проектно-Технологическийинститут Литейного Производства | Method of curing casting moulds |
| EP0073294A2 (en) * | 1981-08-25 | 1983-03-09 | Nippon Kokan Pipe Fitting Mfg. Co., Ltd. | Method of manufacturing a shell mold |
| JPH01205849A (en) * | 1988-02-12 | 1989-08-18 | Komatsu Ltd | Method for hardening co2 mold |
| CN1555943A (en) * | 2004-01-02 | 2004-12-22 | 李钟毅 | Technology and mould for fast production of automobile brake drum casting sand mould |
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2010
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB886328A (en) * | 1958-12-30 | 1962-01-03 | Sarl Doittau Produits Metallur | Improvements in and relating to methods for preparing mouldable exothermic products |
| SU801970A1 (en) * | 1978-03-27 | 1981-02-07 | Всесоюзный Проектно-Технологическийинститут Литейного Производства | Method of curing casting moulds |
| EP0073294A2 (en) * | 1981-08-25 | 1983-03-09 | Nippon Kokan Pipe Fitting Mfg. Co., Ltd. | Method of manufacturing a shell mold |
| JPH01205849A (en) * | 1988-02-12 | 1989-08-18 | Komatsu Ltd | Method for hardening co2 mold |
| CN1555943A (en) * | 2004-01-02 | 2004-12-22 | 李钟毅 | Technology and mould for fast production of automobile brake drum casting sand mould |
Non-Patent Citations (1)
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| 《广西机械技术》 19781231 玉林柴油机厂 铁模复砂铸造4105柴油机曲轴工艺试验小结 22-28 1-5 , 第3期 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109047647A (en) * | 2018-09-18 | 2018-12-21 | 大连科承铸造装备科技有限公司 | A kind of swage water-glass sand covers type precise forming process |
| CN109290513A (en) * | 2018-09-18 | 2019-02-01 | 大连科承铸造装备科技有限公司 | A kind of environmental protection water-glass sand shell mold process |
| WO2020208227A1 (en) * | 2019-04-11 | 2020-10-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | System and method for producing a casting mould |
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| CN101837429B (en) | 2012-07-04 |
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Address after: 161002 Qigihar City, Heilongjiang province Tiefeng District Plant Road No. 36 Patentee after: CRRC QIQIHAR VEHICLE CO., LTD. Address before: 161002 Qigihar City, Heilongjiang province Tiefeng District Plant Road No. 36 Patentee before: Qiqihar Rail Traffic Equipment Co., Ltd. |
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