CN102794400A - Method for indirectly manufacturing low-melting-point alloy mold - Google Patents
Method for indirectly manufacturing low-melting-point alloy mold Download PDFInfo
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- CN102794400A CN102794400A CN201110135947XA CN201110135947A CN102794400A CN 102794400 A CN102794400 A CN 102794400A CN 201110135947X A CN201110135947X A CN 201110135947XA CN 201110135947 A CN201110135947 A CN 201110135947A CN 102794400 A CN102794400 A CN 102794400A
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Abstract
The invention provides a method for manufacturing a low-melting-point alloy mold. The method comprises the following steps of: (1) designing a computer aided design (CAD) model according to a material object, and manufacturing a laminated object prototype; (2) mixing and stirring silicon rubber components according to a ratio, and manufacturing a silicon-rubber mold in a vacuum injection molding machine to serve as an intermediate conversion mold; (3) weighing gypsum mixture and water according to a ratio, and manufacturing a gypsum mold core on gypsum type vacuum grouting equipment; (4) manufacturing an upper ceramic mold and a lower ceramic mold; and (5) closing the mold and pouring, pouring alloy melt, solidifying and cooling the alloy to obtain the alloy mold. The indirect manufacturing method is suitable for manufacturing the low-melting-point metal mold which is complex in shape, fine in surface pattern and high in precision requirement and has wide application prospect and market prospect.
Description
Technical field
The present invention relates to a kind of preparation method of low-melting-point alloy die, in particular, relate to a kind of manufacturing approach of indirect preparation low-melting-point alloy die.
Background technology
The world wide inner mold has formed a huge commercial market, has reached the scale of 80,000,000,000 dollars of output values in the global range.Mold making technology can be divided into direct mold making technology and indirect mold making technology.
The direct molding method 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 RP technology and make fast mould, 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.Directly precision is low, the characteristics of material property difference owing to existing at present for mold making technology.With regard to present development trend, main is main with indirect fast mould manufacturing technology still, and it is occupied an leading position.
The present inventor through the improvement to the material prescription of gypsum mould, has developed a kind of quick forming method of gypsum mould on the basis of introducing the RP technology; And then on the basis of plaster mold, prepare required tin-indium alloy mould fast.
Plaster casting is a kind of characteristic casting technique, 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.
Summary of the invention
The objective of the invention is defective, invented a kind of method of utilizing gypsum mould to prepare metal die indirectly to above-mentioned prior art.
The technical scheme that the present invention takes is: the preparation method of alloy mold, and it may further comprise the steps:
1. at first according to Design CAD model in kind, make laminated solid mass and make prototype;
2. mix the stir silicon rubber components in proportion, on type vacuum injecting and forming machine, make the silica gel mould, as the intermediate conversion mould;
3. take by weighing gypsum mixture and water in proportion, on gypsum mould vacuum grouting equipment, make the gypsum core;
4. make ceramic mould upper body and lower body;
5. mould assembling cast, cast alloy liquation, the alloy graining cooling obtains alloy mold.
Preferably, wherein said alloy is an indium stannum alloy, and it is formed and proportioning is respectively: tin accounts for 60-90wt%, and surplus is an indium.
Preferably, wherein the preparation technology of gypsum core of step (3) is specially:
(1) requires to carry out the gypsum material proportioning according to precision casting process;
The proportioning of gypsum mixture: white cement 7-10wt%, diatomite, 1-3wt%, surplus is a semi-hydrated gypsum; Water-solid ratio is 45wt%-60wt%;
(2) the gypsum material vacuum for preparing is mixed stirring;
Gypsum mixture vacuum stirring technical process does, at first proportionally quantitative gypsum mixture and the water of weighing;
Be injected into water in the teeter chamber, begin to stir; Then gypsum mixture is poured in the water of teeter chamber, with teeter chamber's sealing, open vacuum system, rapid vacuumizing to 10
3-10
4Pa, mixing speed is 200-500r/min, mixing time is 1-3min;
(3) gypsum mould vacuo-forming;
Open the valve between teeter chamber and the grouting chamber, begin grouting, slurry from being full of die cavity down, when grouting finishes, is opened the chamber of being in the milk along the edge of silica gel mould master mold immediately; The vacuum of chamber of wherein being in the milk is 3 * 10
3-9 * 10
3Pa; Grouting time is 30-90sec;
(4) gypsum mould oven dry and roasting;
Gypsum mould after the grouting passes through the back molding of leaving standstill of 15-30min, and gypsum mould is 20-30 ℃ air drying sclerosis 15-20h in temperature after the demoulding; Dry and roasting thereafter; Bake out temperature is 60-80 ℃, and sintering temperature is 200-280 ℃, roasting time: 100-200min.
The present invention is with respect to the advantage of prior art:
(1) method of the present invention is can performance period short, cost is low, precision is high, utilizes gypsum mold can make corresponding needed low-melting-point metal mould fast.
(2) through indirect manufacturing method, be suitable for producing complex-shaped, surface detail is fine and smooth, and the high low-melting-point metal mould of required precision.
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
Step 1:At first, make laminated solid mass and make prototype according to Design CAD model in kind;
Step 2:Mix the stir silicon rubber components in proportion, on type vacuum injecting and forming machine, make the silica gel mould, as the intermediate conversion mould;
Step 3:Take by weighing gypsum mixture and water in proportion, on gypsum mould vacuum grouting equipment, make the gypsum core;
Step 4:Make ceramic mould upper body and lower body;
Step 5:The mould assembling cast, cast tin-indium alloy liquation, the alloy graining cooling obtains the tin-indium alloy mould;
The composition and the proportioning of wherein said tin-indium alloy are respectively: tin accounts for 90wt%, and indium accounts for 10wt%.
The preparation technology of the gypsum core of step 3 wherein is specially:
(1) gypsum material proportioning
The proportioning of gypsum mixture: white cement 7wt%, diatomite, 3wt%, surplus is a semi-hydrated gypsum; Water-solid ratio is 1: 2;
(2) the gypsum material vacuum for preparing is mixed stirring
Gypsum mixture vacuum stirring technical process does, at first according to 2: 1 ratio weighing quantitative gypsum mixture and water;
Be injected into water in the teeter chamber, begin to stir; Then gypsum mixture is poured in the water of teeter chamber, with teeter chamber's sealing, open vacuum system, rapid vacuumizing to 5 * 10
3Pa, mixing speed is 400r/min, mixing time is 2.5min;
(3) gypsum mould vacuo-forming
Open the valve between teeter chamber and the grouting chamber, begin grouting, slurry from being full of die cavity down, when grouting finishes, is opened the chamber of being in the milk along the edge of silica gel mould master mold immediately; The vacuum of chamber of wherein being in the milk is 5 * 10
3Pa; Grouting time is 30sec;
(4) gypsum mould oven dry and roasting
Gypsum mould after the grouting passes through the back molding of leaving standstill of 30min, and gypsum mould is 25 ℃ air drying sclerosis 15-20h in temperature after the demoulding; Dry and roasting thereafter; Bake out temperature is 60-80 ℃, and sintering temperature is 200-280 ℃, roasting time: 100-200min.
Embodiment 2
Step 1:At first, make laminated solid mass and make prototype according to Design CAD model in kind;
Step 2:Mix the stir silicon rubber components in proportion, on type vacuum injecting and forming machine, make the silica gel mould, as the intermediate conversion mould;
Step 3:Take by weighing gypsum mixture and water in proportion, on gypsum mould vacuum grouting equipment, make the gypsum core;
Step 4:Make ceramic mould upper body and lower body;
Step 5:The mould assembling cast, cast sn-bi alloy liquation, the alloy graining cooling obtains the sn-bi alloy mould;
The composition and the proportioning of wherein said sn-bi alloy are respectively: tin accounts for 60wt%, and bismuth accounts for 40wt%.
The preparation technology of the gypsum core of step 3 wherein is specially:
(1) gypsum material proportioning
The proportioning of gypsum mixture: white cement 8wt%, diatomite, 2wt%, surplus is a semi-hydrated gypsum; Water-solid ratio is 1: 2;
(2) the gypsum material vacuum for preparing is mixed stirring
Gypsum mixture vacuum stirring technical process does, at first according to 2: 1 ratio weighing quantitative gypsum mixture and water;
Be injected into water in the teeter chamber, begin to stir; Then gypsum mixture is poured in the water of teeter chamber, with teeter chamber's sealing, open vacuum system, rapid vacuumizing to 5 * 10
3Pa, mixing speed is 400r/min, mixing time is 2.5min;
(3) gypsum mould vacuo-forming
Open the valve between teeter chamber and the grouting chamber, begin grouting, slurry from being full of die cavity down, when grouting finishes, is opened the chamber of being in the milk along the edge of silica gel mould master mold immediately; The vacuum of chamber of wherein being in the milk is 5 * 10
3Pa; Grouting time is 30sec;
(4) gypsum mould oven dry and roasting
Gypsum mould after the grouting passes through the back molding of leaving standstill of 30min, and gypsum mould is 25 ℃ air drying sclerosis 15-20h in temperature after the demoulding; Dry and roasting thereafter; Bake out temperature is 60-80 ℃, and sintering temperature is 200-280 ℃, roasting time: 100-200min.
Adopt the low-melting-point alloy die of the application's alloy mold preparation method preparation; Particularly the ashbury metal mould has the excellent size precision; Appearance is highly polished, and that the ashbury metal mould of the application preparation is suitable for is wide in variety, the stamping products in little, the task-set and the experiment of new product in batches.
Claims (5)
1. the preparation method of an alloy mold, it may further comprise the steps:
mixes the stir silicon rubber components in proportion; On type vacuum injecting and forming machine, make the silica gel mould, as the intermediate conversion mould;
makes ceramic mould upper body and lower body;
2. the preparation method of the described alloy mold of claim 1 is characterized in that described alloy is a low-melting alloy.
3. the preparation method of the described alloy mold of claim 1 is characterized in that described alloy is an ashbury metal.
4. the preparation method of the described alloy mold of claim 1 is characterized in that described ashbury metal is the tin-indium alloy sn-bi alloy that lives.
5. the preparation method of the described alloy mold of claim 1 is characterized in that the preparation technology of the gypsum core of step 3 is specially:
(1) requires to carry out the gypsum material proportioning according to precision casting process;
The proportioning of gypsum mixture: white cement 7-10wt%, diatomite, 1-3wt%, surplus is a semi-hydrated gypsum; Water-solid ratio is 45wt%-60wt%;
(2) the gypsum material vacuum for preparing is mixed stirring;
Gypsum mixture vacuum stirring technical process does, at first proportionally quantitative gypsum mixture and the water of weighing;
Be injected into water in the teeter chamber, begin to stir; Then gypsum mixture is poured in the water of teeter chamber, with teeter chamber's sealing, open vacuum system, rapid vacuumizing to 10
3-10
4Pa, mixing speed is 200-500r/min, mixing time is 1-3min;
(3) gypsum mould vacuo-forming;
Open the valve between teeter chamber and the grouting chamber, begin grouting, slurry from being full of die cavity down, when grouting finishes, is opened the chamber of being in the milk along the edge of silica gel mould master mold immediately; The vacuum of chamber of wherein being in the milk is 3 * 10
3-9 * 10
3Pa; Grouting time is 30-90sec;
(4) gypsum mould oven dry and roasting;
Gypsum mould after the grouting passes through the back molding of leaving standstill of 15-30min, and gypsum mould is 20-30 ℃ air drying sclerosis 15-20h in temperature after the demoulding; Dry and roasting thereafter; Bake out temperature is 60-80 ℃, and sintering temperature is 200-280 ℃, roasting time: 100-200min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110135947XA CN102794400A (en) | 2011-05-24 | 2011-05-24 | Method for indirectly manufacturing low-melting-point alloy mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110135947XA CN102794400A (en) | 2011-05-24 | 2011-05-24 | Method for indirectly manufacturing low-melting-point alloy mold |
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| CN102794400A true CN102794400A (en) | 2012-11-28 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103357533A (en) * | 2013-07-18 | 2013-10-23 | 许健航 | Oil-spraying soft rubber mold and preparation method thereof |
| CN106702207A (en) * | 2017-02-14 | 2017-05-24 | 力创(台山)电子科技有限公司 | Low-melting-point alloy for automobile tire mould |
| CN109940135A (en) * | 2019-04-18 | 2019-06-28 | 中国电子科技集团公司第二十九研究所 | A kind of method of manufacturing technology of the cold pipe of special-shaped thin wall ring control |
| CN110860658A (en) * | 2019-12-03 | 2020-03-06 | 中国船舶重工集团公司第十二研究所 | Preparation method of wax mold gypsum core of cylindrical thin-wall complex component |
| CN113752738A (en) * | 2021-09-09 | 2021-12-07 | 丁剑韬 | High-carving and flower-carving process for thin blank |
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2011
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103357533A (en) * | 2013-07-18 | 2013-10-23 | 许健航 | Oil-spraying soft rubber mold and preparation method thereof |
| CN103357533B (en) * | 2013-07-18 | 2016-08-10 | 太仓德宝玩具制品有限公司 | Oil spout soft jelly mould and preparation method thereof |
| CN106702207A (en) * | 2017-02-14 | 2017-05-24 | 力创(台山)电子科技有限公司 | Low-melting-point alloy for automobile tire mould |
| CN109940135A (en) * | 2019-04-18 | 2019-06-28 | 中国电子科技集团公司第二十九研究所 | A kind of method of manufacturing technology of the cold pipe of special-shaped thin wall ring control |
| CN109940135B (en) * | 2019-04-18 | 2020-06-16 | 中国电子科技集团公司第二十九研究所 | Manufacturing process method of special-shaped thin-wall environment-controlled cold pipe |
| CN110860658A (en) * | 2019-12-03 | 2020-03-06 | 中国船舶重工集团公司第十二研究所 | Preparation method of wax mold gypsum core of cylindrical thin-wall complex component |
| CN110860658B (en) * | 2019-12-03 | 2021-06-25 | 中国船舶重工集团公司第十二研究所 | Preparation method of wax mold gypsum core of cylindrical thin-wall complex component |
| CN113752738A (en) * | 2021-09-09 | 2021-12-07 | 丁剑韬 | High-carving and flower-carving process for thin blank |
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Application publication date: 20121128 |