CN102794394A - Method for pouring copper alloy mold by utilizing gypsum mould - Google Patents
Method for pouring copper alloy mold by utilizing gypsum mould Download PDFInfo
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- CN102794394A CN102794394A CN2011101359361A CN201110135936A CN102794394A CN 102794394 A CN102794394 A CN 102794394A CN 2011101359361 A CN2011101359361 A CN 2011101359361A CN 201110135936 A CN201110135936 A CN 201110135936A CN 102794394 A CN102794394 A CN 102794394A
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Abstract
The invention provides a method for indirectly and rapidly manufacturing a copper alloy mold by utilizing a gypsum mould and a copper alloy mold obtained by the method. According to the alloy mold manufactured by the method, the cost is only 1/5 to 1/3 of that of the traditional machining mold, and the manufacturing cycle is only 1/5 to 1/4 of that of the traditional machining mold. Compared with the traditional pouring process, the method has the advantages that the poured alloy mold is smooth in surface and high in quality.
Description
Technical field
The present invention relates to a kind of castable method of alloy mold, in particular, the present invention relates to a kind of method of utilizing gypsum mould cast copper alloy die.
Background technology
The manufacturing approach of traditional moulds has a lot, for example, and NC Milling, spark machined, line cutting processing, Electrolyzed Processing, electroforming processing, pressure processing and etching technique etc.But because these technical sophistications, length consuming time and expense are high and then influenced the development progress of new product.And traditional fast mould is difficult to satisfy fully user's requirement because technology is coarse, precision is low, the life-span is short, and traditional fast mould also is difficult to reach requirement fast.Therefore, use the fast mould manufacturing technology, before the die sinking of final production mould, carry out the test and the small lot batch manufacture of product, can practice thrift development time and expense effectively.
Plaster casting is a kind of Special Processes of Metal Castings technology, and it is meant molten metal casting to the gypsum being a kind of casting method in the casting mold processed of base-material.It has can the casting surface precision high, complex-shaped non-ferrous casting; Advantages such as the easy cleaning in cast back are usually used in the mould manufacturing of non-ferrous metal, and adopting the method major defect that turns over mould acquisition gypsum mould is complex technical process; Need the system master mold, turn over system silica gel mould; The pouring gypsum mould obtains behind the gypsum mould casting metal foundry goods again, and in turning over mold process, has loss of significance.
Gypsum mould is with the slurry slurry molding of gypsum mixture, slurry mobile fine, and at the vacuum retrofilling, its processability is good.Slurry has slight expansion again in condensation process, multiple mould excellent performance, and casting mold is accurate, bright and clean, and advantage is very tangible.
The present inventor utilizes fast mould manufacturing technology of the prior art successfully to develop a kind of method of utilizing the gypsum parent form to prepare copper alloy die.
Summary of the invention
The present invention has put down in writing a kind of method of utilizing gypsum mould cast copper alloy die, and it may further comprise the steps:
1. the preparation of gypsum pattern
A. the preparation of gypsum matrix mould
The prescription of gypsum matrix mould slurry:
White cement: 8-12wt%, diatomite: 2-5, CMC: 3-6wt%, oleic acid: 3-6wt%, the semi-hydrated gypsum of sodium polyphosphate: 0.03wt% and surplus; Water-solid ratio=1: 2～2: 3;
Mix load weighted gypsum formula with water and to stir in a vacuum and be in the milk; Grouting back molding in 10-30 minute, dry 20-30 hour of air;
B. the preparation of gypsum convex mould
The prescription of gypsum convex mould slurry:
Silica flour: 8-12wt%, diatomite: 2-5, CMC: 3-6wt%, oleic acid: 3-6wt%, the semi-hydrated gypsum of sodium polyphosphate: 0.03wt% and surplus; Water-solid ratio=1: 2～2: 3;
Mix load weighted gypsum formula with water and to stir in a vacuum and be in the milk; Grouting back molding in 10-30 minute, dry 20-30 hour of air;
The gypsum pattern external coating polyvinyl alcohol of air dry applies high-temperaure coating;
2. the oven dry of gypsum pattern and roasting
Bake out temperature: 60-100 ℃, drying time: 15-25h; Sintering temperature: 200-280 ℃, roasting time: 120-200min;
3. the cast of copper alloy
Heating and the described copper alloy of fusion under vacuum or low pressure of inert gas, heating-up temperature is the above 30-60 of copper alloy fusing point ℃ a temperature; The gypsum pattern for preparing is placed on the workbench that has whirligig; The rotating speed of workbench is 50-200r/min, in vacuum or inert atmosphere, the copper alloy fused solution is poured in the gypsum pattern; Cast temperature is the above 20-40 of copper alloy fusing point ℃, waters till the predetermined height;
Wherein, the high-temperaure coating in the step 2 is the coating that comprises carbonitride or boron nitride self-lubricating phase.
Wherein, the applying method in the step 2 comprise be coated with, brush, soak, vapour deposition or spraying; The preferred spraying coating process that adopts, spraying can be selected methods such as electric arc spraying, plasma spraying, detonation flame spraying.
Wherein, the heating process in the step 3 is methods such as vacuum induction fusion, induction coil heating.
The present invention is with respect to the advantage of prior art:
(1) compares the smooth surface of the cast alloy mold that the inventive method is produced, quality height with traditional pouring technology.
(2) utilize this method can make various mold cavities, for example molding mold cavity, injection molding die cavity, diel cavity etc., it can eliminate defectives such as pore fully.
(3) with low cost, its cost of alloy mold of employing the application's method preparation has only the 1/3-1/5 of traditional mechanical processing mold; Manufacturing cycle has only the former 1/4-1/5.
Description of drawings
Fig. 1 is the sketch map of spun casting process of the present invention.
Specific embodiment
Below will make further explanation to technical scheme of the present invention through specific embodiment.The applicant it is emphasized that following examples only are the needs for the content that specifies invention, and can not think limitation of the present invention.The present invention requires the scope protected, is as the criterion with the technical scheme that claims were limited.
Embodiment 1
1. the preparation of gypsum pattern
A. the preparation of gypsum matrix mould
White cement: 12wt%, diatomite: 3wt%, CMC: 3wt%, oleic acid: 3wt%, the semi-hydrated gypsum of sodium polyphosphate: 0.03wt% and surplus; Water-solid ratio=1: 2; Mix load weighted gypsum formula with water and to stir in a vacuum and be in the milk; The molding in back 20 minutes of being in the milk, dry 25 hours of air;
B. the preparation of gypsum convex mould
The prescription of gypsum convex mould slurry: silica flour: 12wt%, diatomite: 3wt%, CMC: 3wt%, oleic acid: 3wt%, the semi-hydrated gypsum of sodium polyphosphate: 0.03wt% and surplus; Water-solid ratio=1: 2; Mix load weighted gypsum formula with water and to stir in a vacuum and be in the milk; The molding in back 20 minutes of being in the milk, dry 25 hours of air; The gypsum pattern external coating polyvinyl alcohol of air dry, electric arc spraying contains the self-lubricating coat in use of boron nitride;
2. the oven dry of gypsum pattern and roasting
Bake out temperature: 80 ℃, drying time: 20h; Sintering temperature: 280 ℃, roasting time: 150min;
3. the cast of copper alloy
Heating and the described copper alloy of fusion under vacuum environment, the mode of heating of employing vacuum induction fusion is heated to 30 degree more than the copper alloy fusing point with temperature, forms the copper alloy of fusion; The gypsum pattern is placed on the workbench that has whirligig, and the rotating speed of workbench is 100r/min, in nitrogen atmosphere, the copper alloy fused solution is toppled in the entering gypsum pattern; Cast temperature is above 20 degree of melt temperature, forms described copper alloy die.
Embodiment 2
1. the preparation of gypsum pattern
A. the preparation of gypsum matrix mould
White cement: 10wt%, diatomite: 5wt%, CMC: 5wt%, oleic acid: 5wt%, the semi-hydrated gypsum of sodium polyphosphate: 0.03wt% and surplus; Water-solid ratio=2: 3; Mix load weighted gypsum formula with water and to stir in a vacuum and be in the milk; The molding in back 20 minutes of being in the milk, dry 25 hours of air;
B. the preparation of gypsum convex mould
The prescription of gypsum convex mould slurry: silica flour: 10wt%, diatomite: 5wt%, CMC: 3wt%, oleic acid: 3wt%, the semi-hydrated gypsum of sodium polyphosphate: 0.03wt% and surplus; Water-solid ratio=2: 3; Mix load weighted gypsum formula with water and to stir in a vacuum and be in the milk; The molding in back 20 minutes of being in the milk, dry 25 hours of air; The gypsum pattern external coating polyvinyl alcohol of air dry, electric arc spraying contains the self-lubricating coat in use of boron nitride;
2. the oven dry of gypsum pattern and roasting
Bake out temperature: 100 ℃, drying time: 15h; Sintering temperature: 280 ℃, roasting time: 120min;
3. the cast of copper alloy
Heating and the described copper alloy of fusion under the environment of argon shield, the mode of heating of employing vacuum induction fusion is heated to 60 degree more than the copper alloy fusing point with temperature, forms the copper alloy of fusion; The gypsum pattern is placed on the workbench that has whirligig, and the rotating speed of workbench is 50r/min, in nitrogen atmosphere, the copper alloy fused solution is toppled in the entering gypsum pattern; Cast temperature is above 40 degree of melt temperature, forms described copper alloy die.
Embodiment 3
1. the preparation of gypsum pattern
A. the preparation of gypsum matrix mould
White cement: 8wt%, diatomite: 4wt%, CMC: 6wt%, oleic acid: 6wt%, the semi-hydrated gypsum of sodium polyphosphate: 0.03wt% and surplus; Water-solid ratio=1: 2; Mix load weighted gypsum formula with water and to stir in a vacuum and be in the milk; The molding in back 20 minutes of being in the milk, dry 30 hours of air;
B. the preparation of gypsum convex mould
The prescription of gypsum convex mould slurry: silica flour: 8wt%, diatomite: 4wt%, CMC: 6wt%, oleic acid: 6wt%, the semi-hydrated gypsum of sodium polyphosphate: 0.03wt% and surplus; Water-solid ratio=1: 2; Mix load weighted gypsum formula with water and to stir in a vacuum and be in the milk; The molding in back 20 minutes of being in the milk, dry 25 hours of air; The gypsum pattern external coating polyvinyl alcohol of air dry, electric arc spraying contains the self-lubricating coat in use of carbonitride;
2. the oven dry of gypsum pattern and roasting
Bake out temperature: 90 ℃, drying time: 20h; Sintering temperature: 250 ℃, roasting time: 200min;
3. the cast of copper alloy
Heating and the described copper alloy of fusion under vacuum environment, the mode of heating of employing vacuum induction fusion is heated to 50 degree more than the copper alloy fusing point with temperature, forms the copper alloy of fusion; The gypsum pattern is placed on the workbench that has whirligig, and the rotating speed of workbench is 100r/min, in nitrogen atmosphere, the copper alloy fused solution is toppled in the entering gypsum pattern; Cast temperature is above 30 degree of melt temperature, forms described copper alloy die.
The uniformity of the copper alloy die that embodiment 1-3 casting obtains approaches forged material, and directional solidification makes the quality of casting matrix fine, and does not have casting defect.
Claims (8)
1. method of utilizing gypsum mould cast copper alloy die, it may further comprise the steps:
The preparation of step 1. gypsum pattern
A. the preparation of gypsum matrix mould
The prescription of gypsum matrix mould slurry:
White cement: 8-12wt%, diatomite: 2-5, CMC: 3-6wt%, oleic acid: 3-6wt%, the semi-hydrated gypsum of sodium polyphosphate: 0.03wt% and surplus; Water-solid ratio=1: 2～2: 3; Mix load weighted gypsum formula with water and to stir in a vacuum and be in the milk; Grouting back molding in 10-30 minute, dry 20-30 hour of air;
B. the preparation of gypsum convex mould
The prescription of gypsum convex mould slurry: silica flour: 8-12wt%, diatomite: 2-5, CMC: 3-6wt%, oleic acid: 3-6wt%, the semi-hydrated gypsum of sodium polyphosphate: 0.03wt% and surplus; Water-solid ratio=1: 2～2: 3; Mix load weighted gypsum formula with water and to stir in a vacuum and be in the milk; Grouting back molding in 10-30 minute, dry 20-30 hour of air; The gypsum pattern external coating polyvinyl alcohol of air dry applies high-temperaure coating;
The oven dry and the roasting of step 2. gypsum pattern
The gypsum matrix mould and the gypsum convex mould of air dry are dried and roasting process; Wherein: bake out temperature: 60-100 ℃, drying time: 15-25h; Sintering temperature: 200-280 ℃, roasting time: 120-200min;
The cast of step 3. copper alloy
Heating and the described copper alloy of fusion under vacuum or low pressure of inert gas, heating-up temperature is the above 30-60 of copper alloy fusing point ℃ a temperature; The gypsum pattern for preparing is placed on the workbench that has whirligig; The rotating speed of workbench is 50-200r/min; In vacuum or inert atmosphere, the copper alloy fused solution is poured in the gypsum pattern, cast temperature is the above 20-40 of copper alloy fusing point ℃; Water till the predetermined height, obtain described copper alloy mould.
2. the described method of utilizing gypsum mould cast copper alloy die of claim 1 is characterized in that the high-temperaure coating in the step 2 is the coating that comprises carbonitride or boron nitride self-lubricating phase.。
3. the described method of utilizing gypsum mould cast copper alloy die of claim 2, it is characterized in that applying method in the step 2 comprise be coated with, brush, soak, vapour deposition or spraying;
4. the described method of utilizing gypsum mould cast copper alloy die of claim 3 is characterized in that adopting spraying coating process.
5. the described method of utilizing gypsum mould cast copper alloy die of claim 4 is characterized in that described spraying method is flame-spraying, electric arc spraying, plasma spraying or detonation flame spraying.
6. the described method of utilizing gypsum mould cast copper alloy die of claim 1 is characterized in that the heating process in the step 3 is methods such as vacuum induction fusion, induction coil heating.
7. the described method of utilizing gypsum mould cast copper alloy die of claim 1, the rotating speed that it is characterized in that workbench in the step 3 is 50-200r/min.
8. a copper alloy die is made according to described any one method of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101359361A CN102794394A (en) | 2011-05-24 | 2011-05-24 | Method for pouring copper alloy mold by utilizing gypsum mould |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101359361A CN102794394A (en) | 2011-05-24 | 2011-05-24 | Method for pouring copper alloy mold by utilizing gypsum mould |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493107A (en) * | 2014-12-29 | 2015-04-08 | 无锡蕾菲赛尔机械科技有限公司 | Angle box for mold manufacturing |
| CN109338144A (en) * | 2018-11-07 | 2019-02-15 | 三峡大学 | A kind of preparation method of 20 four sides leptospira structure foam copper |
| CN112264575A (en) * | 2020-10-20 | 2021-01-26 | 西安工程大学 | Hollow ceramic core adopting die swinging method and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5858083A (en) * | 1994-06-03 | 1999-01-12 | National Gypsum Company | Cementitious gypsum-containing binders and compositions and materials made therefrom |
| JP2002348168A (en) * | 2001-05-30 | 2002-12-04 | Kowa Chem Ind Co Ltd | Quick hardening, humidity adjustable inorganic diatomaceous paint finishing material and its method |
| KR20050024754A (en) * | 2003-09-01 | 2005-03-11 | 이희경 | Method of solidifying sea clay and soft ground with waste plaster and cement |
| CN1594176A (en) * | 2004-07-01 | 2005-03-16 | 易湘如 | Gypsum powder combined material for master mould |
| CN1974470A (en) * | 2006-12-12 | 2007-06-06 | 利文海 | Wall scraping gypsum powder and its production process |
| CN101433952A (en) * | 2008-12-19 | 2009-05-20 | 谢克非 | Technique for manufacturing air pressure type non-cutting quick-molding low melting-temperature alloy mold |
-
2011
- 2011-05-24 CN CN2011101359361A patent/CN102794394A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5858083A (en) * | 1994-06-03 | 1999-01-12 | National Gypsum Company | Cementitious gypsum-containing binders and compositions and materials made therefrom |
| JP2002348168A (en) * | 2001-05-30 | 2002-12-04 | Kowa Chem Ind Co Ltd | Quick hardening, humidity adjustable inorganic diatomaceous paint finishing material and its method |
| KR20050024754A (en) * | 2003-09-01 | 2005-03-11 | 이희경 | Method of solidifying sea clay and soft ground with waste plaster and cement |
| CN1594176A (en) * | 2004-07-01 | 2005-03-16 | 易湘如 | Gypsum powder combined material for master mould |
| CN1974470A (en) * | 2006-12-12 | 2007-06-06 | 利文海 | Wall scraping gypsum powder and its production process |
| CN101433952A (en) * | 2008-12-19 | 2009-05-20 | 谢克非 | Technique for manufacturing air pressure type non-cutting quick-molding low melting-temperature alloy mold |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493107A (en) * | 2014-12-29 | 2015-04-08 | 无锡蕾菲赛尔机械科技有限公司 | Angle box for mold manufacturing |
| CN104493107B (en) * | 2014-12-29 | 2016-08-31 | 无锡蕾菲赛尔机械科技有限公司 | A kind of angle case for Making mold |
| CN109338144A (en) * | 2018-11-07 | 2019-02-15 | 三峡大学 | A kind of preparation method of 20 four sides leptospira structure foam copper |
| CN112264575A (en) * | 2020-10-20 | 2021-01-26 | 西安工程大学 | Hollow ceramic core adopting die swinging method and preparation method thereof |
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Application publication date: 20121128 |