CN102773409A - Method for manufacturing casting blank of die for inner containers of household appliances on basis of metal cavity with cold iron structure - Google Patents
Method for manufacturing casting blank of die for inner containers of household appliances on basis of metal cavity with cold iron structure Download PDFInfo
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Abstract
The invention discloses a method for manufacturing a casting blank of a die for inner containers of household appliances on the basis of a metal cavity with a cold iron structure, and relates to the technical field of aluminum alloy casting. The method includes particular steps of constructing an outer cavity by cold iron blocks on the periphery of a manufactured wood mold in a form following manner; filling gaps among the cold iron blocks by clay sand, tightly filling the corresponding cold iron blocks by clay sand after each local structure is completed, and compacting a sand mould to prevent the cold iron blocks from moving; constructing a sand core of an inner cavity by the same method after the outer cavity is constructed; opening a case to take out the wood mould after the sand core of the inner cavity is manufactured so that a cavity of a casting is formed; drying the cavity of the casting and the sand core consisting of clay sand; preheating the cavity of the casting at the preheating temperature of 200 DEG C before pouring of the cavity of the casting; casting melted aluminum alloy into the cavity of the casting; and opening the case to take out the casting after the cavity of the casting is cooled naturally. The method is mainly used for casting the die for the inner containers of the household appliances, the surface of a casting product produced by the process is high in smoothness and does not have sand holes or pin holes after the surface of the casting product is treated in a follow-up machining process, and accordingly yield of molded inner container products is greatly increased.
Description
Technical field:
The present invention relates to the aluminium alloy casting technical field, relate in particular to a kind of method of making household electrical appliances inner bag mould strand based on chill structure metal mold cavity.
Background technology:
Household electrical appliances inner bag mould is a kind of of vacuum plastics sucking moulding, and product requires very high to the fineness of mould molding face.Surface quality and yield rate after the quality of mould molding face directly has influence on inner bag and is shaped, therefore for the inner bag mould, its forming surface roughness requires to be not more than Ra=0.8 μ m, and surfacing, smooth, no sand holes, pore-free.
At present, generally adopt greensand mold cast household electrical appliances inner bag mould, but big for the appearance profile size, interior cavity structure is complicated and need to lay the inner bag mould of cooling water pipe, and die cavity is not easy finishing and the type that collapses easily when using full sand casting.The sand mold heat transfer coefficient is less, and to be in time above liquidus longer for the metallic solution temperature in die cavity, so metal alloy is prone to form coarse grain, organize shrinkage porosite in process of setting, has determined that to a certain extent the surface roughness of foundry goods post processing is higher.Simultaneously, occur shrinkage cavity and pore in the cast product easily, cast(ing) surface is prone to produce sand holes and scab, therefore adopts sand casting inner bag mould yield rate lower.
For the inner texture of coarse crystal of refinement foundry goods, eliminate the casting flaw of cast(ing) surface, can adopt all-metal type cast mould; But all-metal type manufacturing cost is high; The production preparatory period is long, and metal mold processing time consuming, effort are produced difficulty of heavy castings.Permanent mold casting is particularly suitable for bigger, middle-size and small-size foundry goods in batches, and the inner bag mould generally is single-piece production, does not have part in batches; And casting dimension is bigger; So use the metal mold production mould can reach the die surface quality requirement, but production cost is high, the cycle is long.Consider that from financial cost and technical difficulty all-metal type technology is not suitable for the manufacturing of inner bag mould strand.
Summary of the invention:
Technical problem to be solved by this invention is to overcome the defective of prior art; Provide a kind of chill structure that utilizes to be designed to the casting new method that metal mold cavity is made household electrical appliances inner bag mould; To its objective is in order solving and to use sand casting inner bag mould yield rate low, die surface is easy to generate various casting flaws such as pin hole, shrinkage porosite; The technological design difficulty is big when having avoided simultaneously manufacturing and designing the all-metal type, and die manufacturing cost is high, produces the problem of heavy castings difficulty.
Technical problem to be solved by this invention adopts following technical scheme to realize.
A kind of method based on chill structure metal mold cavity manufacturing household electrical appliances inner bag mould strand is characterized in that concrete steps comprise:
A. at the die cavity outside the frozen iron blocks structure that utilizes of the peripheral conformal of the wooden model mould of making, frozen iron blocks is close to the mould outline, guarantees casting dimension accuracy;
B. the slit between frozen iron blocks place is filled up with clay-bonded sand, fill out tight frozen iron blocks with clay-bonded sand after accomplishing the structure of a part, and the consolidation sand mold prevents the frozen iron blocks displacement at every turn;
C. after outer die cavity structure is accomplished, use the same method and construct interior die cavity core again;
D. unpack after interior die cavity core completes and take out wooden model, form the foundry goods die cavity;
E. the core of foundry goods die cavity and clay-bonded sand formation is dried; All contain moisture content in frozen iron blocks, the clay-bonded sand; Need dry away moisture content, guarantee dry environment in the casting mold, in foundry goods, form pore, pin hole otherwise produce a large amount of steam during casting metal liquid or react with steam;
F. before cast, also need the foundry goods die cavity is carried out preheating, preheat temperature is 200 ℃;
G. melted aluminium alloy is poured in the foundry goods die cavity;
H. the taking-up foundry goods of can unpacking after the cooling naturally.
The said frozen iron blocks back side is welded with T shape hook, strengthens the bonding strength of frozen iron blocks and sand mold, and when unpacking the taking-up wooden model, whole chill metal mold cavity can not misplace, and causes the mistake of cavity dimension like this.
During said aluminium alloy smelting, temperature of aluminum liquid removes the gred when reaching 690 ℃, and rotten treatment temperature is at 710 ℃, and the temperature of blowing refining is skimmed after the aluminium liquid after the refining leaves standstill a period of time at 730 ℃, and aluminium liquid pouring temperature is controlled at 720 ℃.
It is high that the cast product of under this technology, producing is handled the back surface smoothness through following process, the existence of no sand holes, pin hole, thus the inner bag product percent of pass after the moulding is significantly improved.
Beneficial effect of the present invention is: 1. the quality of cast product and qualification rate improve greatly; Because outer die cavity adopts the metal mold of frozen iron blocks structure; Aluminium alloy is full of cast(ing) surface consecutive solidification under the iron chill shock chilling effect behind the die cavity; The cast(ing) surface setting rate is accelerated, and dendrite has little time to grow up, so what obtain is tiny, fine and close crystalline structure; The crystal grain of foundry goods is thin more, and the inferior looks between the crystallographic axis, shrinkage porosite, pore are got over disperse, even casting flaw can not occur; Chill has increased the thermograde of process of setting, has strengthened the feeding effect of rising head; Metallic inclusion on crystal boundary under the effect of chill and impurity disperse simultaneously distributes, thereby improved mechanical property; So the quality of production and the qualification rate of cast product are improved to a great extent.
2. the frozen iron blocks degree of freedom in design is high; Can be according to inner bag mould local form design frozen iron blocks, shape-designing is convenient and swift, has improved production efficiency; Utilize the outer die cavity of frozen iron blocks structure metal to overcome the difficulty of the difficult finishing of sand mold; Save the high cost of making the all-metal type die, reduced production cost, improved economic benefit.
3. improve the foundry goods precision, reduced the reservation processing capacity, reduce strand weight and reach about 15%; Use the outer die cavity of chill can improve the foundry goods precision, can produce the foundry goods of the complicated big or small various models of shape and structure, can make the casting dimension Deviation Control between ± 0.5mm.
4. casting Technology Design is flexible, can change the thermograde of process of setting according to the selection chill working surface area and the position of casting section thickness flexible in size, forms the order that solidifies of consecutive solidification.
5. molding sand can be repeatedly used, and can reduce the molding sand consumption, has reduced raw-material consumption, has reduced production cost.
Description of drawings:
Fig. 1 is the structural representation of wooden model among the present invention;
Fig. 2 is the sketch map of the outer die cavity of frozen iron blocks structure.
The specific embodiment:
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, below in conjunction with concrete diagram, further set forth the present invention.
Like Fig. 1, shown in Figure 2, a large aluminum alloy template class strand is made with pre-buried stainless steel pipes technology, and the practical implementation method is following:
1. accomplish the threedimensional model design of inner bag product based on computer aided design software CAD MBM; Utilize the biasing surface order with machined surface biasing thickening, the allowance of fast automatic interpolation foundry goods according to inner bag foundry goods X-Y scheme; Take out for the ease of wooden model 6, need carry out withdrawing pattern to foundry goods and handle, will note during withdrawing pattern: size two ends, withdrawing pattern place size conforms part tolerance; Make as far as possible wall thickness evenly or thickness be more or less the same, drafting angle is generally got about 1 °.
2. according to wooden model Design and Machining technology, utilize the dividing body order, with each datum level the 3D solid that step designs in is 1. rationally split accurately; To guarantee during fractionation that the sheet number is few more good more, get the raw materials ready, accomplish the assembly of wooden model mould according to splitting the body wooden model.
3. after good running gate system 1 was confirmed in design, the wooden model 6 that assembles in 2. with step was the basis, in sandbox 3, carries out moulding; Around wooden model 6 outlines conformal lay frozen iron blocks 4, the T shape hook 5 of frozen iron blocks 4 back sides welding has been strengthened the bonding strength of frozen iron blocks 4 with core 2; Complicated when the mould local feature, in the time of can not constructing die shape with the rectangle chill, need design and manufacture the conformal frozen iron blocks separately; Behind the good outer die cavity of structure, die cavity core and running gate system 1 in making; After accomplishing moulding work, unpack and take out wooden model 6, carry out the cleaning of die cavity.
4. die cavity cleaning is dried metal mold cavity and core after accomplishing, and goes out wherein moisture content.Before the cast it is carried out preheating, preheat temperature is generally 200 ℃, guarantees environment dry in the casting mold.
More than show and described basic principle of the present invention, 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; That describes in the foregoing description and the specification just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (3)
1. make the method for household electrical appliances inner bag mould strand based on chill structure metal mold cavity for one kind, it is characterized in that concrete steps comprise:
A. at the die cavity outside the frozen iron blocks structure that utilizes of the peripheral conformal of the wooden model mould made; B. the slit between frozen iron blocks place is filled up with clay-bonded sand, fill out tight frozen iron blocks with clay-bonded sand after accomplishing the structure of a part, and the consolidation sand mold prevents the frozen iron blocks displacement at every turn;
C. after outer die cavity structure is accomplished, use the same method and construct interior die cavity core again;
D. unpack after interior die cavity core completes and take out wooden model, form the foundry goods die cavity;
E. the core of foundry goods die cavity and clay-bonded sand formation is dried;
F. before cast, also need the foundry goods die cavity is carried out preheating, preheat temperature is 200 ℃;
G. melted aluminium alloy is poured in the foundry goods die cavity;
H. the taking-up foundry goods of can unpacking after the cooling naturally.
2. the method based on chill structure metal mold cavity manufacturing household electrical appliances inner bag mould strand according to claim 1, it is characterized in that: the said frozen iron blocks back side is welded with T shape hook.
3. the method for making household electrical appliances inner bag mould strand based on chill structure metal mold cavity according to claim 1; It is characterized in that: during said aluminium alloy smelting; Temperature of aluminum liquid removes the gred when reaching 690 ℃, and rotten treatment temperature is at 710 ℃, and the temperature of blowing refining is at 730 ℃; Skim after aluminium liquid after the refining leaves standstill a period of time, aluminium liquid pouring temperature is controlled at 720 ℃.
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| CN201210257721.1A CN102773409B (en) | 2012-07-24 | 2012-07-24 | Method for manufacturing casting blank of die for inner containers of household appliances on basis of metal cavity with cold iron structure |
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| CN201210257721.1A CN102773409B (en) | 2012-07-24 | 2012-07-24 | Method for manufacturing casting blank of die for inner containers of household appliances on basis of metal cavity with cold iron structure |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658504A (en) * | 2013-11-26 | 2014-03-26 | 滁州金诺实业有限公司 | Novel process for sand casting of aluminium alloy casting blanks |
| CN104493103A (en) * | 2014-12-15 | 2015-04-08 | 滁州金诺实业有限公司 | Pre-embedding process of water pipe of sand casting household appliance liner mould |
| CN104525856A (en) * | 2014-12-15 | 2015-04-22 | 滁州金诺实业有限公司 | Modeling process of upper box for refrigerator inner liner mold on the basis of V-process casting |
| CN104525855A (en) * | 2014-12-15 | 2015-04-22 | 滁州金诺实业有限公司 | Metal-type process of casting blank for refrigerator inner liner mold on the basis of V-process casting |
| CN104525857A (en) * | 2014-12-15 | 2015-04-22 | 滁州金诺实业有限公司 | Upper box structure for refrigerator inner liner mold on the basis of V-process casting |
| CN104525899A (en) * | 2014-12-15 | 2015-04-22 | 滁州金诺实业有限公司 | Casting process for vacuum casting household appliance mold aluminum alloy castings |
| CN104525858A (en) * | 2014-12-15 | 2015-04-22 | 滁州金诺实业有限公司 | Vacuum casting process of embedded pipe of aluminum alloy casting for home appliance mold |
| CN104801667A (en) * | 2013-12-31 | 2015-07-29 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for preventing generation of casting crack of high temperature alloy mold |
| CN104826986A (en) * | 2015-04-20 | 2015-08-12 | 鞍山千钢机械制造有限公司 | Method used for preventing sand adhesion of sand mould castings, and sand mould prefabricated components |
| CN104999059A (en) * | 2015-07-20 | 2015-10-28 | 柳州市建西机械铸造厂 | Heat treatment process of cast parts |
| CN105081214A (en) * | 2015-08-31 | 2015-11-25 | 苏氏精密制造技术（北京）股份有限公司 | Casting method |
| CN105618675A (en) * | 2015-12-30 | 2016-06-01 | 山东汇金股份有限公司 | Conformal sand-lined densener casting method |
| CN106141106A (en) * | 2015-03-31 | 2016-11-23 | 株式会社日立制作所 | The coating method of the coating of metal casting mould and this metal casting mould |
| CN107661967A (en) * | 2017-11-25 | 2018-02-06 | 山西江淮重工有限责任公司 | Aluminium copper structural member casting internal densener structure and its laying method |
| CN109434062A (en) * | 2018-11-23 | 2019-03-08 | 中船海洋动力部件有限公司 | For improving the dark chill and its laying method of cast structure nodularization |
| CN110918923A (en) * | 2019-12-03 | 2020-03-27 | 兰州高压阀门有限公司 | Casting process of sequential directional solidification double-layer conical shell structure casting |
| CN113996754A (en) * | 2021-10-22 | 2022-02-01 | 共享装备股份有限公司 | Casting sand mold and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58119434A (en) * | 1982-01-08 | 1983-07-15 | Eagle Ind Co Ltd | Sliding material for mechanical seal |
| CN1907597A (en) * | 2006-08-22 | 2007-02-07 | 沪东重机股份有限公司 | Casting method for exhaust branch pipe of thin-wall ball iron triplet |
| CN101234410A (en) * | 2008-03-06 | 2008-08-06 | 天瑞集团铸造有限公司 | Casting mold for casting wheels of train |
| CN201143552Y (en) * | 2007-06-18 | 2008-11-05 | 刘建高 | Iron chill type venting plug |
| CN201922017U (en) * | 2011-01-17 | 2011-08-10 | 河南中汇汽车零部件有限公司 | Chilled cast iron camshaft integrated chilling block |
-
2012
- 2012-07-24 CN CN201210257721.1A patent/CN102773409B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58119434A (en) * | 1982-01-08 | 1983-07-15 | Eagle Ind Co Ltd | Sliding material for mechanical seal |
| CN1907597A (en) * | 2006-08-22 | 2007-02-07 | 沪东重机股份有限公司 | Casting method for exhaust branch pipe of thin-wall ball iron triplet |
| CN201143552Y (en) * | 2007-06-18 | 2008-11-05 | 刘建高 | Iron chill type venting plug |
| CN101234410A (en) * | 2008-03-06 | 2008-08-06 | 天瑞集团铸造有限公司 | Casting mold for casting wheels of train |
| CN201922017U (en) * | 2011-01-17 | 2011-08-10 | 河南中汇汽车零部件有限公司 | Chilled cast iron camshaft integrated chilling block |
Cited By (25)
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| CN103658504A (en) * | 2013-11-26 | 2014-03-26 | 滁州金诺实业有限公司 | Novel process for sand casting of aluminium alloy casting blanks |
| CN103658504B (en) * | 2013-11-26 | 2016-06-29 | 滁州金诺实业有限公司 | The technique of sand-cast aluminium alloy strand |
| CN104801667B (en) * | 2013-12-31 | 2017-05-17 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for preventing generation of casting crack of high temperature alloy mold |
| CN104801667A (en) * | 2013-12-31 | 2015-07-29 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for preventing generation of casting crack of high temperature alloy mold |
| CN104525858A (en) * | 2014-12-15 | 2015-04-22 | 滁州金诺实业有限公司 | Vacuum casting process of embedded pipe of aluminum alloy casting for home appliance mold |
| CN104525857A (en) * | 2014-12-15 | 2015-04-22 | 滁州金诺实业有限公司 | Upper box structure for refrigerator inner liner mold on the basis of V-process casting |
| CN104525855A (en) * | 2014-12-15 | 2015-04-22 | 滁州金诺实业有限公司 | Metal-type process of casting blank for refrigerator inner liner mold on the basis of V-process casting |
| CN104525899A (en) * | 2014-12-15 | 2015-04-22 | 滁州金诺实业有限公司 | Casting process for vacuum casting household appliance mold aluminum alloy castings |
| CN104493103A (en) * | 2014-12-15 | 2015-04-08 | 滁州金诺实业有限公司 | Pre-embedding process of water pipe of sand casting household appliance liner mould |
| CN104525856A (en) * | 2014-12-15 | 2015-04-22 | 滁州金诺实业有限公司 | Modeling process of upper box for refrigerator inner liner mold on the basis of V-process casting |
| CN104525856B (en) * | 2014-12-15 | 2016-07-06 | 滁州金诺实业有限公司 | Inner container of icebox mould top box formative technology is cast based on V method |
| CN104525857B (en) * | 2014-12-15 | 2016-07-13 | 滁州金诺实业有限公司 | Inner container of icebox mould box structure is cast based on V method |
| CN104493103B (en) * | 2014-12-15 | 2016-08-17 | 滁州金诺实业有限公司 | The sand casting household electrical appliances pre-buried technique of die for inner water pipe |
| CN106141106A (en) * | 2015-03-31 | 2016-11-23 | 株式会社日立制作所 | The coating method of the coating of metal casting mould and this metal casting mould |
| CN104826986A (en) * | 2015-04-20 | 2015-08-12 | 鞍山千钢机械制造有限公司 | Method used for preventing sand adhesion of sand mould castings, and sand mould prefabricated components |
| CN104999059A (en) * | 2015-07-20 | 2015-10-28 | 柳州市建西机械铸造厂 | Heat treatment process of cast parts |
| CN105081214A (en) * | 2015-08-31 | 2015-11-25 | 苏氏精密制造技术（北京）股份有限公司 | Casting method |
| CN105618675A (en) * | 2015-12-30 | 2016-06-01 | 山东汇金股份有限公司 | Conformal sand-lined densener casting method |
| CN105618675B (en) * | 2015-12-30 | 2019-03-15 | 山东汇金股份有限公司 | The casting method of sand cooling iron is covered with the shape |
| CN107661967A (en) * | 2017-11-25 | 2018-02-06 | 山西江淮重工有限责任公司 | Aluminium copper structural member casting internal densener structure and its laying method |
| CN109434062A (en) * | 2018-11-23 | 2019-03-08 | 中船海洋动力部件有限公司 | For improving the dark chill and its laying method of cast structure nodularization |
| CN110918923A (en) * | 2019-12-03 | 2020-03-27 | 兰州高压阀门有限公司 | Casting process of sequential directional solidification double-layer conical shell structure casting |
| CN110918923B (en) * | 2019-12-03 | 2021-05-25 | 兰州高压阀门有限公司 | Casting process of sequential directional solidification double-layer conical shell structure casting |
| CN113996754A (en) * | 2021-10-22 | 2022-02-01 | 共享装备股份有限公司 | Casting sand mold and application thereof |
| CN113996754B (en) * | 2021-10-22 | 2023-07-28 | 共享装备股份有限公司 | Sand mould for casting and application thereof |
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