CN107377878A - A kind of evaporative pattern ammeter housing - Google Patents
A kind of evaporative pattern ammeter housing Download PDFInfo
- Publication number
- CN107377878A CN107377878A CN201710661392.XA CN201710661392A CN107377878A CN 107377878 A CN107377878 A CN 107377878A CN 201710661392 A CN201710661392 A CN 201710661392A CN 107377878 A CN107377878 A CN 107377878A
- Authority
- CN
- China
- Prior art keywords
- parts
- casting
- powder
- coating
- model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/04—Housings; Supporting racks; Arrangements of terminals
Abstract
The invention belongs to field of electrical equipment, discloses a kind of evaporative pattern ammeter housing, and it is prepared according to following technique：EPS beads are injected in mold cavity after one step foaming, are formed model by expansion in the presence of high-temperature steam, are put into precoated sand mould, by penetrating sand, heating makes its solidification, is then immersed in the fireproof coating got ready in advance, fireproof coating is evenly coated in model surface after taking-up；Pouring liquid metal, forms casting after cooling in toward mould；After casting shaping, formed and remove the arenaceous shell of its outer surface to obtain exposed required form of metal completely；The residual sand grains and oxide skin of cast(ing) surface are removed, is produced.Inventive shell structural integrity, each corner filling is intact, and fire resistance is good.
Description
Technical field
The invention belongs to field of electrical equipment, specifically discloses a kind of evaporative pattern ammeter housing.
Background technology
Ammeter is the abbreviation of electric energy meter, is the instrument for measuring electric energy, also known as kilowatt-hour meter, energy meter, electric energy meter, kilowatt small
When table, refer to the instrument for measuring various electrical quantities.Ammeter housing mainly plays the function of protection ammeter inner body, it is necessary to good
Mechanical performance, good heat endurance and fire resistance.Domestic ammeter case material at present uses flame-proof ABS more.It is although fire-retardant
ABS is cheap, but rigidity is not fine.
Negative casting of EPC method be by with the identical plastic foam model of casting dimension shape and phase same material system
Into running and feeding system bond and be combined into model cluster, after brushing lost foam paint and drying, be embedded in the dry sand of special shape mo(u)lding box and shake
Dynamic consolidation moulding, connects special shape mo(u)lding box with vacuum equipment and vacuumizes, keep pouring into a mould high temperature under conditions of certain negative pressure in casting mold
Molten metal, model is set to melt and gasify, catabolite is escaped by mold―metal interface, and liquid metal occupies modal position, and solidification is cold
But a kind of casting method of casting is formed afterwards.Lost foam casting has the protrusions such as casting dimension accuracy is high, pollute less, cost is low excellent
Point, it is described as " foundry engieering of 21 century " and " green revolution of foundary industry ".
The content of the invention
Technical problem to be solved of the embodiment of the present invention is, for current evaporative pattern forging method in production ammeter housing
When, it may appear that the corner of intricate casting is difficult to the problem of filling, it is proposed that a kind of evaporative pattern ammeter housing.
To achieve these goals, technical scheme is realized in the following way：
A kind of evaporative pattern ammeter housing, it is prepared according to following technique：
EPS beads are injected in mold cavity after one step foaming, and model is formed by expansion in the presence of high-temperature steam,
It is put into precoated sand mould, by penetrating sand, heating makes its solidification, is then immersed in the fireproof coating got ready in advance, resistance to after taking-up
Fiery coating is evenly coated in model surface, it is not trickled, and does not accumulate, coating layer thickness about 1mm or so, 50-55 DEG C of drying room temperature,
Below 40 DEG C of humidity requirement；Pouring liquid metal, forms casting after cooling in toward mould；After casting shaping, formed and remove it
The arenaceous shell of outer surface is to obtain exposed required form of metal completely；The residual sand grains and oxide skin of cast(ing) surface are removed,
Produce.
Further,
The fireproof coating is prepared by the raw material of following parts by weight：Alumina powder 15-25 parts, pyrophyllite powder 12-16 parts, aluminium
Alumina 10-15 parts, magnesium powder 5-7 parts, agstone 5-7 parts, brown alundum powder 4-5 parts, white alundum powder 1-2 parts, lithium bentonite 2-3
Part, sodium carboxymethylcellulose 2-3 parts, palygorskite 1-2 parts, waterglass 1-2 parts, aluminum sulfate 1-2 parts, VAE emulsion 1-2 parts, positive fourth
Alcohol 0.4-0.7 parts, n-octyl alcohol 0.2-0.3 parts, water 25-40 parts.
The present invention has the advantages that：
The overlay film arenaceous shell lost-foam casting method of the present invention is good by overlay film arenaceous shell forging method demoulding, and casting corner is easily filled
Advantage, make the shell structure produced complete, each corner filling is intact；
Fireproof coating of the present invention possesses preferable fire resistance, and white alundum powder is to be formed with alumina powder through electric smelting recrystallization, is fitted
The evaporative pattern for closing the cast of the high temperature such as heat resisting steel, steel alloy uses, and the great English chalk line coefficient of expansion is small, and heat shaken stability is good, refractoriness
It is high and in high temperature to most of alloys not chemically reactive；Brown Alundum has higher refractoriness, it can be ensured that casting does not produce
Raw penetration defect.Bauxite powder particles have less dihedral coefficient, and particle circularity is good, larger with dihedral coefficient
Brown alundum powder etc. matches, and adds the voidage of dope layer, effectively increases the hot permeability of coating.Above-mentioned refractory material group
Close and draw best of breed scheme by many experiments combination, the granularity and distribution of particle sizes of all the components are to influence coating densification
An important factor for degree and gas permeability, particularly lost foam paint, to thermal decomposition product energy of the foamed coating model in sintering process
No smoothly discharged by coating has a major impact；
The binding agent of the present invention uses the combination of 2 parts of waterglass, 2 parts of aluminum sulfate, 1.5 parts of VAE emulsions so that coating has higher
Normal temperature strength and elevated temperature strength.
The present invention was taken out using 1 second in 70-80 DEG C of paraffin solution, apperance surface is uniformly waxed 0.1mm, is turned into bubble
The compound apperance beneficial effect of foam paraffin, Foam Pattern surface treatment is improved, surface roughness can be suitable with fusible pattern casting wax pattern, carries
The surface quality and dimensional accuracy of high casting technique production casting, treatment effeciency is high, is suitable for producing operation in enormous quantities.
The suspension crosslinking agent of coating of the present invention employs 2.5 parts of lithium bentonite, 2 parts of sodium carboxymethylcellulose, palygorskite 1
Part coordinates, and palygorskite is that crystalloid is hydrated alumina magnesia silicate, the layer chain structure feature with uniqueness, is existed in its structure
Crystal lattice, help to contain variable amount of Na+, Ca2+, Fe3+, Al3+ in crystal, crystal is in needle-like, threadiness or fiber collection shape
It has good colloidal nature and the higher adsorption bleaching abilities such as unique scattered, high temperature resistant, salt resistance alkali.And with certain
Plasticity and cohesive force, above-mentioned suspension crosslinking agent is used cooperatively, and coating is formd the space structure of highly netted intertexture, right
Bulky grain refractory aggregate has extremely strong adsorptivity, coating of the present invention is possessed good suspension, thixotropy and brushability, obtains
Uniform and thin coating is obtained, so as to improve the gas permeability of coating.
Present invention addition agstone, the temperature stage and polystyrene different in casting process for eliminating steel-casting
Carbon caused by foamed plastics pyrolysis, to sum up, the present invention has good heat-insulated heat resistance and good painting relative to other coating
Brush, and there is good high temperature low-temperature stability and there is splendid peeling effect, produced after reducing polystyrene burns
The carbon distribution that raw free carbon is formed in cast(ing) surface, while permeability is excellent, can effectively prevent stomata, slag inclusion phenomenon,
The quality of casting is improved, it is easy to fall off in molten steel pouring course and form pigment finish leather to reduce the dope layer due to bubbles model,
The defects of causing casting bark pocket, slag inclusion, scab.
Embodiment
Further explanation will be made to the present invention using specific embodiment below, but it is not intended as creating the present invention
The limitation of new spirit.
Embodiment 1
A kind of evaporative pattern ammeter housing, it is prepared according to following technique：
EPS beads are injected in mold cavity after one step foaming, and model is formed by expansion in the presence of high-temperature steam,
It is put into precoated sand mould, by penetrating sand, heating makes its solidification, is then immersed in the fireproof coating got ready in advance, resistance to after taking-up
Fiery coating is evenly coated in model surface, it is not trickled, and does not accumulate, coating layer thickness about 1mm or so, 50-55 DEG C of drying room temperature,
Below 40 DEG C of humidity requirement；Pouring liquid metal, forms casting after cooling in toward mould；After casting shaping, formed and remove it
The arenaceous shell of outer surface is to obtain exposed required form of metal completely；The residual sand grains and oxide skin of cast(ing) surface are removed,
Produce.
The fireproof coating is prepared by the raw material of following parts by weight：15 parts of alumina powder, 12 parts of pyrophyllite powder, aluminium alum
10 parts of soil, 5 parts of magnesium powder, 5 parts of agstone, 4 parts of brown alundum powder, 1 part of white alundum powder, 2 parts of lithium bentonite, carboxymethyl cellulose
2 parts of sodium, 1 part of palygorskite, 1 part of waterglass, 1 part of aluminum sulfate, 1 part of VAE emulsions, 0.4 part of n-butanol, 0.2 part of n-octyl alcohol, water 25
Part.
Embodiment 2
A kind of evaporative pattern ammeter housing, it is prepared according to following technique：
EPS beads are injected in mold cavity after one step foaming, and model is formed by expansion in the presence of high-temperature steam,
It is put into precoated sand mould, by penetrating sand, heating makes its solidification, is then immersed in the fireproof coating got ready in advance, resistance to after taking-up
Fiery coating is evenly coated in model surface, it is not trickled, and does not accumulate, coating layer thickness about 1mm or so, and 50-55 DEG C of drying room temperature is wet
Degree requires less than 40 DEG C；Pouring liquid metal, forms casting after cooling in toward mould；After casting shaping, formed and removed outside it
The arenaceous shell on surface is to obtain exposed required form of metal completely；The residual sand grains and oxide skin of cast(ing) surface are removed, i.e.,
.
The fireproof coating is prepared by the raw material of following parts by weight：25 parts of alumina powder, 16 parts of pyrophyllite powder, aluminium alum
15 parts of soil, 7 parts of magnesium powder, 7 parts of agstone, 5 parts of brown alundum powder, 2 parts of white alundum powder, 3 parts of lithium bentonite, carboxymethyl cellulose
3 parts of sodium, 2 parts of palygorskite, 2 parts of waterglass, 2 parts of aluminum sulfate, 2 parts of VAE emulsions, 0.7 part of n-butanol, 0.3 part of n-octyl alcohol, water 40
Part.
Embodiment 3
According to the evaporative pattern method of embodiment 1, provide using carburetting data when coating of the present invention and common coating casting steel casting
Compare, experiment material is No. 45 steel, and contrast test is using formulation for coating material disclosed in Publication No. CN101444827 employed in it
Disappearance model material be：Polystyrene, density of material：0.022g/cm3.Specific cast steel characteristic the results are shown in Table 1：
Table 1
| Brushing index | Low temperature intensity is more than/g（2 layers of 1mm） | |
| Prior art lost-foam casting method | 4.7-4.9 | 700-800 |
| It is prepared by the method for embodiment 1 | 5.45 | 930 |
The performance of the reduction steel-casting phosphorus content of casting prepared by the present invention well, casts parts, substantially meets steel-casting
Machining needs, good actual casting technological effect is achieved, it has good heat-insulated heat resistance and good brushing
Property, and there is good high temperature low-temperature stability and practicality, there is splendid peeling effect, while permeability is excellent,
Stomata, slag inclusion phenomenon can be effectively prevented, improves the quality of casting, subsequent treatment is simple, and saving is substantial amounts of artificial, can be extensive
Lost foam casting applied to cast steel.
Above example only not limits technical scheme described in the invention to illustrate the present invention；Therefore, although this theory
Bright book is with reference to above-mentioned each embodiment to present invention has been detailed description, still, one of ordinary skill in the art
It should be appreciated that still can be modified to the present invention or equivalent substitution；And all do not depart from the technology of spirit and scope
Scheme and its improvement, it all should cover among scope of the presently claimed invention.
Claims (2)
1. a kind of evaporative pattern ammeter housing, it is prepared according to following technique：
EPS beads are injected in mold cavity after one step foaming, and model is formed by expansion in the presence of high-temperature steam,
It is put into precoated sand mould, by penetrating sand, heating makes its solidification, is then immersed in the fireproof coating got ready in advance, resistance to after taking-up
Fiery coating is evenly coated in model surface, it is not trickled, and does not accumulate, coating layer thickness about 1mm or so, and 50-55 DEG C of drying room temperature is wet
Degree requires less than 40 DEG C；Pouring liquid metal, forms casting after cooling in toward mould；After casting shaping, formed and removed outside it
The arenaceous shell on surface is to obtain exposed required form of metal completely；The residual sand grains and oxide skin of cast(ing) surface are removed, i.e.,
.
2. ammeter housing according to claim 1, it is characterised in that the fireproof coating by following parts by weight raw material system
It is standby and obtain：Alumina powder 15-25 parts, pyrophyllite powder 12-16 parts, bauxite 10-15 parts, magnesium powder 5-7 parts, agstone 5-7 parts,
Brown alundum powder 4-5 parts, white alundum powder 1-2 parts, lithium bentonite 2-3 parts, sodium carboxymethylcellulose 2-3 parts, palygorskite 1-2 parts,
Waterglass 1-2 parts, aluminum sulfate 1-2 parts, VAE emulsion 1-2 parts, n-butanol 0.4-0.7 parts, n-octyl alcohol 0.2-0.3 parts, water 25-40
Part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710661392.XA CN107377878A (en) | 2017-08-04 | 2017-08-04 | A kind of evaporative pattern ammeter housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710661392.XA CN107377878A (en) | 2017-08-04 | 2017-08-04 | A kind of evaporative pattern ammeter housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107377878A true CN107377878A (en) | 2017-11-24 |
Family
ID=60343955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710661392.XA Pending CN107377878A (en) | 2017-08-04 | 2017-08-04 | A kind of evaporative pattern ammeter housing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107377878A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412076A (en) * | 2008-03-07 | 2009-04-22 | 安徽应流铸业有限公司 | A kind of precision casting technique of ceramic shell lost foam |
| NL1034981C1 (en) * | 2008-01-31 | 2009-08-03 | Havadi B V | Bracket for synthetic foam shuttering, has clamping arms specially oriented relative to length axis of span portion |
| CN101698218A (en) * | 2009-11-09 | 2010-04-28 | 山西天海泵业有限公司 | Lost-foam casting method for water pump thin-wall part |
| CN102218507A (en) * | 2011-06-14 | 2011-10-19 | 安徽全柴天和机械有限公司 | Lost foam casting technology leading sands to be compacter |
| CN102228954A (en) * | 2011-06-14 | 2011-11-02 | 安徽全柴天和机械有限公司 | Lost foam casting technique capable of reducing deformation of mould piece joining seam |
| CN102363198A (en) * | 2011-04-11 | 2012-02-29 | 中方阀业淅川制造有限公司 | Evaporative pattern casting method of nodular cast iron flywheel casing |
| CN102363200A (en) * | 2011-09-23 | 2012-02-29 | 无锡市凯杰铸造有限公司 | Lost foam casting method of lock casing of freight container hand-operated lock |
| 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 |
| CN104999033A (en) * | 2015-07-15 | 2015-10-28 | 湖北永浩铸业科技有限公司 | Precoated sand shell lost foam precise casting method |
| CN105328123A (en) * | 2015-08-21 | 2016-02-17 | 国网山东省电力公司临沂供电公司 | Cable fault detector |
| CN105344940A (en) * | 2015-12-07 | 2016-02-24 | 兴化市雅兰机械制造有限公司 | Motor casing expendable pattern casting process |
| CN105436398A (en) * | 2015-08-21 | 2016-03-30 | 国网山东省电力公司临沂供电公司 | External cable sensing alarm |
| EP2858772B1 (en) * | 2012-06-12 | 2017-04-19 | Bayerische Motoren Werke Aktiengesellschaft | Cooling device and method for cooling a component produced in a lost foam casting method |
-
2017
- 2017-08-04 CN CN201710661392.XA patent/CN107377878A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1034981C1 (en) * | 2008-01-31 | 2009-08-03 | Havadi B V | Bracket for synthetic foam shuttering, has clamping arms specially oriented relative to length axis of span portion |
| CN101412076A (en) * | 2008-03-07 | 2009-04-22 | 安徽应流铸业有限公司 | A kind of precision casting technique of ceramic shell lost foam |
| CN101698218A (en) * | 2009-11-09 | 2010-04-28 | 山西天海泵业有限公司 | Lost-foam casting method for water pump thin-wall part |
| CN102363198A (en) * | 2011-04-11 | 2012-02-29 | 中方阀业淅川制造有限公司 | Evaporative pattern casting method of nodular cast iron flywheel casing |
| CN102218507A (en) * | 2011-06-14 | 2011-10-19 | 安徽全柴天和机械有限公司 | Lost foam casting technology leading sands to be compacter |
| CN102228954A (en) * | 2011-06-14 | 2011-11-02 | 安徽全柴天和机械有限公司 | Lost foam casting technique capable of reducing deformation of mould piece joining seam |
| CN102363200A (en) * | 2011-09-23 | 2012-02-29 | 无锡市凯杰铸造有限公司 | Lost foam casting method of lock casing of freight container hand-operated lock |
| EP2858772B1 (en) * | 2012-06-12 | 2017-04-19 | Bayerische Motoren Werke Aktiengesellschaft | Cooling device and method for cooling a component produced in a lost foam casting method |
| 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 |
| CN104999033A (en) * | 2015-07-15 | 2015-10-28 | 湖北永浩铸业科技有限公司 | Precoated sand shell lost foam precise casting method |
| CN105328123A (en) * | 2015-08-21 | 2016-02-17 | 国网山东省电力公司临沂供电公司 | Cable fault detector |
| CN105436398A (en) * | 2015-08-21 | 2016-03-30 | 国网山东省电力公司临沂供电公司 | External cable sensing alarm |
| CN105344940A (en) * | 2015-12-07 | 2016-02-24 | 兴化市雅兰机械制造有限公司 | Motor casing expendable pattern casting process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103170579B (en) | Stainless steel water meter shell and machining method thereof | |
| CN101767184B (en) | Lost foam casting cast iron coating for preventing carbon defects and preparation method thereof | |
| JP5632136B2 (en) | Disintegrating mold and manufacturing method thereof | |
| US20170050236A1 (en) | Method of producing casting mold and casting mold | |
| CN105499497A (en) | V-method casting process | |
| CN105436411A (en) | High-permeability evaporative pattern casting method | |
| CN103231016A (en) | Casting method of magnesium alloy casting | |
| CN105583365A (en) | Evaporative pattern casting method for diesel engine casing | |
| CN104399891A (en) | Casting method combining investment precise shell-making process with vacuum suction molding technology | |
| CN102000762A (en) | Combined coating layer process for large-scale steel casting water glass sand molds | |
| WO2017152589A1 (en) | Method for producing mould and core through curing sodium silicate sand for casting by blowing | |
| CN102357647B (en) | Environmentally-friendly magnesia sand for casting and preparation process thereof | |
| CN102371340A (en) | Lost foam casting method for large casting | |
| BR112020022229B1 (en) | COATING COMPOSITION, ITS USE, PROCESS FOR COATING A CASTING MOLD, AND COATED CASTING MOLD | |
| CN101554644A (en) | Lost foam casting process suitable for aluminum alloy materials | |
| CN113996759B (en) | Aluminum lithium alloy casting adopting shell to inhibit interface reaction and casting method thereof | |
| CN103084540B (en) | A kind of lost foam paint compound method for casting heat-resistant steel or wear-resisting alloy steel | |
| CN108015228B (en) | Casting mold irregular cavity temperature field subregion regulates and controls method | |
| CN108927489B (en) | Improved method for improving lost foam casting manufacturing precision | |
| CN102407281B (en) | Lost foam casting paint | |
| CN107377878A (en) | A kind of evaporative pattern ammeter housing | |
| CN107052243A (en) | A kind of cast iron lost foam casting process | |
| CN105312501A (en) | Die casting method | |
| KR102314875B1 (en) | Refractory coating compositions for forming surfaces on temporary molds or on cores for iron and steel foundry operations | |
| JP2019084566A (en) | Mold wash composition for lost foam pattern |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171124 |
|
| RJ01 | Rejection of invention patent application after publication |