CN105537520A - Production technology for casting lost foam - Google Patents
Production technology for casting lost foam Download PDFInfo
- Publication number
- CN105537520A CN105537520A CN201610033923.6A CN201610033923A CN105537520A CN 105537520 A CN105537520 A CN 105537520A CN 201610033923 A CN201610033923 A CN 201610033923A CN 105537520 A CN105537520 A CN 105537520A
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- parts
- production technology
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
Abstract
The invention discloses a production technology for casting lost foam, and relates to the technical field of lost foam production. The production technology is characterized in that the production technology sequentially comprises the following steps of EPS bead preparation, prefoaming, moulding, curing and storage, assembly and bonding, doping, and drying, wherein in the step of assembly and bonding, a bonding agent is made of the following components in parts by weight: 40-60 parts of a polyvinyl acetate emulsion, 5-8 parts of bone glue, 10-20 parts of paraffin, 3-5 parts of maleic anhydride and 2-6 parts of dimethylethanolamine. According to the production technology, during workpiece casting with the lost foam, the bonding agent is high in cohesiveness, little in pollution and low in boiling point, and is residue-free, and paint is high in cohesiveness, little in pollution and good in air permeability, and is residue-free.
Description
Technical field:
The present invention relates to evaporative pattern production technical field, specifically a kind of production technology of vanish mould for casting.
Background technology:
Lost foam casting is that foam mould adopts bindless dry sand in conjunction with the cavityless casting of vacuum pumping technology.Domestic main call has " dry sand cavityless casting ", " vacuum full mold casting ", is called for short EPC casting.Lost foam casting is current one of state-of-the-art casting technique in the world, is described as once " revolution " in casting history, is referred to as 21 century Green foundry both at home and abroad.Not much that overall time is shaping in the prior art of evaporative pattern, need just can be completed by bonding moulding, and there is coating outside, binding agent for evaporative pattern bonding of the prior art is fairly simple, some boiling point is high, is unfavorable for casting, easily leaves some residues after evaporation, metalwork for casting has a certain impact, and stickiness is not high.
Summary of the invention:
It is high that technical problem to be solved by this invention is to provide a kind of caking property, and pollute little, boiling point is low, the production technology of the vanish mould for casting that the binding agent without residue bonds.
Solve technical problem adopt following technical scheme:
A production technology for vanish mould for casting, is characterized in that: comprise the following steps successively, and EPS bead, prefoam, molding, slaking are deposited, assemble bonding, coated and dry,
Adhesive when described assembling bonds is made up of following parts by weight of component, polyvinyl acetate emulsion 40 ~ 60 parts, 5 ~ 8 parts, gelatine, 10 ~ 20 parts, paraffin, maleic anhydride 3 ~ 5 parts and dimethylethanolamine 2 ~ 6 parts.
Control temperature 95 ~ 105 DEG C during described prefoam, pressure is 0.01 ~ 0.04MPa, and the time is 60 ~ 120s, bulk density 0.016 ~ 0.022g/cm
3, moisture less than 2%.
Described adhesive is made up of following methods, first by gelatine and paraffin abrasive dust, then paraffin, gelatine is fully mixed with polyvinyl acetate emulsion, maleic anhydride and dimethylethanolamine, is heated to 60 ~ 70 DEG C, then cooling packing.
Described coating has following parts by weight of component to make, graphite powder 80 ~ 100 parts, petroleum coke powder 5 ~ 10 parts, bentonite 5 ~ 10 parts, hydroxylmethyl cellulose 3 ~ 5 parts, milky white adhesive 1.5 ~ 3 parts, cornstarch 3 ~ 5 parts, zeolite powder 3 ~ 5 parts, triethanolamine 2 ~ 3 parts.
The binding agent used in the present invention has and has good viscosity, be not easy cracking, and binding agent becomes pasty state after bonding, and inner homogeneous without slag, and is at high temperature easy to evaporation disappearance, and at high temperature noresidue residue generates, due to the casting of workpiece.Maleic anhydride in the present invention has the effect increasing binding agent viscosity, and can increase the uniformity of binding agent.
Outside coating in the present invention also has higher viscosity, the die cavity inner surface of dry sand can be attached to preferably, and good permeability, under high temperature, the uniformity is high without disintegrating slag, triethanolamine in the present invention has the effect of thickening moisturizing before not building, and also have some to contain metallic compound unavoidably in casting model powder, triethanolamine can with metal ion model could be comparatively stable complex compound, placing metal ion may have an impact to coating property.Triethanolamine also can evaporate under high temperature after building thereupon.
The preparation method of the binding agent in the present invention can make binding agent evenly, binding agent of the present invention by heating temperatures 60 ~ 70 DEG C, has better bond effect in use.
The invention has the beneficial effects as follows: evaporative pattern of the present invention is when workpiece is cast, and the caking property of binding agent is high, and pollute little, boiling point is low, and without residue, paint adhesion is high, pollutes little, without residue, good permeability.
Detailed description of the invention:
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with instantiation, setting forth the present invention further.
Embodiment 1
A production technology for vanish mould for casting, comprises the following steps successively, and EPS bead, prefoam, molding, slaking are deposited, assemble bonding, coated and dry,
Adhesive during assembling bonding is made up of following parts by weight of component, polyvinyl acetate emulsion 40 parts, 5 parts, gelatine, 10 parts, paraffin, maleic anhydride 3 parts and dimethylethanolamine 2 parts.
Control temperature 95 DEG C during prefoam, pressure is 0.01MPa, and the time is 60s, bulk density 0.016g/cm
3, moisture 0.5%.
Adhesive is made up of following methods, first by gelatine and paraffin abrasive dust, then paraffin, gelatine is fully mixed with polyvinyl acetate emulsion, maleic anhydride and dimethylethanolamine, is heated to 60 DEG C, then cooling packing.
Coating has following parts by weight of component to make, graphite powder 80 parts, petroleum coke powder 5 parts, bentonite 5 parts, hydroxylmethyl cellulose 3 parts, milky white adhesive 1.5 parts, cornstarch 3 parts, zeolite powder 3 parts, triethanolamine 2 parts.
Embodiment 2
A production technology for vanish mould for casting, comprises the following steps successively, and EPS bead, prefoam, molding, slaking are deposited, assemble bonding, coated and dry,
Adhesive during assembling bonding is made up of following parts by weight of component, polyvinyl acetate emulsion 50 parts, 6 parts, gelatine, 15 parts, paraffin, maleic anhydride 4 parts and dimethylethanolamine 4 parts.
Control temperature 100 DEG C during prefoam, pressure is 0.02MPa, and the time is 90s, bulk density 0.02g/cm
3, moisture less than 2%.
Adhesive is made up of following methods, first by gelatine and paraffin abrasive dust, then paraffin, gelatine is fully mixed with polyvinyl acetate emulsion, maleic anhydride and dimethylethanolamine, is heated to 65 DEG C, then cooling packing.
Coating has following parts by weight of component to make, graphite powder 90 parts, petroleum coke powder 8 parts, bentonite 8 parts, hydroxylmethyl cellulose 4 parts, milky white adhesive 2.2 parts, cornstarch 4 parts, zeolite powder 4 parts, triethanolamine 2.5 parts.
Embodiment 3
A production technology for vanish mould for casting, comprises the following steps successively, and EPS bead, prefoam, molding, slaking are deposited, assemble bonding, coated and dry,
Adhesive during assembling bonding is made up of following parts by weight of component, polyvinyl acetate emulsion 60 parts, 8 parts, gelatine, 20 parts, paraffin, maleic anhydride 5 parts and dimethylethanolamine 6 parts.
Control temperature 105 DEG C during prefoam, pressure is 0.04MPa, and the time is 120s, bulk density 0.022g/cm
3, moisture less than 2%.
Adhesive is made up of following methods, first by gelatine and paraffin abrasive dust, then paraffin, gelatine is fully mixed with polyvinyl acetate emulsion, maleic anhydride and dimethylethanolamine, is heated to 70 DEG C, then cooling packing.
Coating has following parts by weight of component to make, graphite powder 100 parts, petroleum coke powder 10 parts, bentonite 10 parts, hydroxylmethyl cellulose 5 parts, milky white adhesive 3 parts, cornstarch 5 parts, zeolite powder 5 parts, triethanolamine 3 parts.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (4)
1. a production technology for vanish mould for casting, is characterized in that: comprise the following steps successively, and EPS bead, prefoam, molding, slaking are deposited, assemble bonding, coated and dry,
Adhesive when described assembling bonds is made up of following parts by weight of component, polyvinyl acetate emulsion 40 ~ 60 parts, 5 ~ 8 parts, gelatine, 10 ~ 20 parts, paraffin, maleic anhydride 3 ~ 5 parts and dimethylethanolamine 2 ~ 6 parts.
2. the production technology of a kind of vanish mould for casting according to claim 1, is characterized in that: control temperature 95 ~ 105 DEG C during described prefoam, pressure is 0.01 ~ 0.04MPa, and the time is 60 ~ 120s, bulk density 0.016 ~ 0.022g/cm
3, moisture less than 2%.
3. the production technology of a kind of vanish mould for casting according to claim 1, it is characterized in that: described adhesive is made up of following methods, first by gelatine and paraffin abrasive dust, again paraffin, gelatine are fully mixed with polyvinyl acetate emulsion, maleic anhydride and dimethylethanolamine, be heated to 60 ~ 70 DEG C, then cooling packing.
4. the production technology of a kind of vanish mould for casting according to claim 1, it is characterized in that: described coating has following parts by weight of component to make, graphite powder 80 ~ 100 parts, petroleum coke powder 5 ~ 10 parts, bentonite 5 ~ 10 parts, hydroxylmethyl cellulose 3 ~ 5 parts, milky white adhesive 1.5 ~ 3 parts, cornstarch 3 ~ 5 parts, zeolite powder 3 ~ 5 parts, triethanolamine 2 ~ 3 parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610033923.6A CN105537520A (en) | 2016-01-19 | 2016-01-19 | Production technology for casting lost foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610033923.6A CN105537520A (en) | 2016-01-19 | 2016-01-19 | Production technology for casting lost foam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105537520A true CN105537520A (en) | 2016-05-04 |
Family
ID=55817342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610033923.6A Pending CN105537520A (en) | 2016-01-19 | 2016-01-19 | Production technology for casting lost foam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105537520A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106216593A (en) * | 2016-07-20 | 2016-12-14 | 仇颖莹 | A kind of preparation method of overlay film modification Os Sus domestica glue sand mold |
| CN109014037A (en) * | 2018-08-01 | 2018-12-18 | 安徽信息工程学院 | A kind of evaporative pattern mending paste and preparation method thereof |
Citations (9)
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|---|---|---|---|---|
| CN101052693A (en) * | 2004-10-26 | 2007-10-10 | 施敏打硬株式会社 | Two pack type acrylic adhesive for casting model preparation and adhesive technique using the same adhesive |
| CN101287566A (en) * | 2005-10-14 | 2008-10-15 | 东洋油墨制造株式会社 | Method for producing metal particle dispersion, conductive ink using metal particle dispersion produced by such method, and conductive coating film |
| CN101288897A (en) * | 2008-04-29 | 2008-10-22 | 即墨市海隆机械有限公司 | Production method of water based paint special for lost foam |
| CN102179472A (en) * | 2011-03-14 | 2011-09-14 | 何剑锋 | Ductile iron coating for lost foam casting, and preparation method thereof |
| CN102921887A (en) * | 2012-10-10 | 2013-02-13 | 安徽红星阀门有限公司 | EPS white die producing process |
| CN102974762A (en) * | 2012-12-24 | 2013-03-20 | 昌图县吉派机械铸造有限责任公司 | Vacuum evanescent die casting process |
| CN103170579A (en) * | 2013-04-18 | 2013-06-26 | 李玉忠 | Stainless steel water meter shell and machining method thereof |
| CN104874738A (en) * | 2015-06-18 | 2015-09-02 | 山西威龙铁路机车制动配件制造有限公司 | Guide nut tooth lost foam casting method |
| CN105246857A (en) * | 2013-05-28 | 2016-01-13 | 柯马杜股份有限公司 | Binder for injection-moulding composition |
-
2016
- 2016-01-19 CN CN201610033923.6A patent/CN105537520A/en active Pending
Patent Citations (9)
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|---|---|---|---|---|
| CN101052693A (en) * | 2004-10-26 | 2007-10-10 | 施敏打硬株式会社 | Two pack type acrylic adhesive for casting model preparation and adhesive technique using the same adhesive |
| CN101287566A (en) * | 2005-10-14 | 2008-10-15 | 东洋油墨制造株式会社 | Method for producing metal particle dispersion, conductive ink using metal particle dispersion produced by such method, and conductive coating film |
| CN101288897A (en) * | 2008-04-29 | 2008-10-22 | 即墨市海隆机械有限公司 | Production method of water based paint special for lost foam |
| CN102179472A (en) * | 2011-03-14 | 2011-09-14 | 何剑锋 | Ductile iron coating for lost foam casting, and preparation method thereof |
| CN102921887A (en) * | 2012-10-10 | 2013-02-13 | 安徽红星阀门有限公司 | EPS white die producing process |
| CN102974762A (en) * | 2012-12-24 | 2013-03-20 | 昌图县吉派机械铸造有限责任公司 | Vacuum evanescent die casting process |
| CN103170579A (en) * | 2013-04-18 | 2013-06-26 | 李玉忠 | Stainless steel water meter shell and machining method thereof |
| CN105246857A (en) * | 2013-05-28 | 2016-01-13 | 柯马杜股份有限公司 | Binder for injection-moulding composition |
| CN104874738A (en) * | 2015-06-18 | 2015-09-02 | 山西威龙铁路机车制动配件制造有限公司 | Guide nut tooth lost foam casting method |
Non-Patent Citations (1)
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| 张文富等: "《新型化工小产品制造技术（第一集）》", 29 February 2000 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106216593A (en) * | 2016-07-20 | 2016-12-14 | 仇颖莹 | A kind of preparation method of overlay film modification Os Sus domestica glue sand mold |
| CN109014037A (en) * | 2018-08-01 | 2018-12-18 | 安徽信息工程学院 | A kind of evaporative pattern mending paste and preparation method thereof |
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Application publication date: 20160504 |