CN107774878A - The dispensing and its preparation technology of a kind of mould for precision casting - Google Patents
The dispensing and its preparation technology of a kind of mould for precision casting Download PDFInfo
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- CN107774878A CN107774878A CN201711375295.0A CN201711375295A CN107774878A CN 107774878 A CN107774878 A CN 107774878A CN 201711375295 A CN201711375295 A CN 201711375295A CN 107774878 A CN107774878 A CN 107774878A
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- parts
- degrees celsius
- silica flour
- mould
- stalk
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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
Abstract
The invention discloses a kind of dispensing of mould for precision casting and its preparation technology, include the raw material of following parts by weight：4.5 7 parts of 22 28 parts of silica flour, 16 20 parts of schmigel, 16 parts of tetraethyl orthosilicate, 2.2 4 parts of sodium metasilicate, 32 40 parts of diatomite, 7 12 parts of polytetrafluoroethylene (PTFE), 0.6 1.5 parts of titanium fiber, 36 parts of waterglass, 10 15 parts of n-butanol, 48 parts of stalk and Salvia japonica.Raw material sources of the present invention are extensive, and preparation technology is simple, and the finished product of preparation still will not deform at a high temperature of 2250 degrees Celsius, ensure the dimensional accuracy of product, meet the use demand of people.
Description
Technical field
The present invention relates to casting field, specifically a kind of dispensing of mould for precision casting.
Background technology
Casting is a kind of history of mankind's grasp than metal heat processing technique, about 6000 earlier.China about exists
B.C. 1700- has been enter into the heyday of bronze casting between B.C. 1000, reached at a relatively high level in technique.Casting
Make be by liquid metals be cast to part shape be adapted casting cavity in, after its cooled and solidified, with obtain part or
The method of blank, by casting material matter mostly originally it was solid-state but was heated to the metal of liquid（Example：Copper, iron, aluminium, tin, lead etc.）.Into 20
In century, quickly, one of its key factor is the progress of product technology to the development speed of casting, it is desirable to the various mechanical-physicals of casting
Can be more preferable, while still there is good machining property；Another reason be mechanical industry in itself with other industry as chemical industry,
The development of instrument etc., favourable material conditions are created to foundry industry.
Hot investment casting is a kind of casting technique developed in recent years, its product is accurate, it is complicated, close to the last shape of part
Shape, it can directly be used without processing or seldom processing, be a kind of advanced technologies of near-net shaping.The mould of hot investment casting is essence
The core component of close casting, but existing precision casting mold resistance to elevated temperatures is poor, die deformation under the condition of high temperature so that mould
Have the product quality produced and outward appearance does not reach quality requirement, waste of resource.
The content of the invention
It is an object of the invention to provide a kind of dispensing of mould for precision casting, to solve to propose in above-mentioned background technology
The problem of.
To achieve the above object, the present invention provides following technical scheme：
A kind of dispensing of mould for precision casting, include the raw material of following parts by weight：Silica flour 22-28 parts, schmigel 16-20
Part, tetraethyl orthosilicate 1-6 parts, sodium metasilicate 2.2-4 parts, diatomite 32-40 parts, polytetrafluoroethylene (PTFE) 7-12 parts, titanium fiber 0.6-1.5
Part, waterglass 3-6 parts, n-butanol 10-15 parts, stalk 4-8 parts and Salvia japonica 4.5-7 parts.
As the further scheme of the present invention：The granularity of silica flour and schmigel is 0.2-1.3mm.
As the further scheme of the present invention：Stalk is used in soybean stalk, rice straw, broomcorn straw and sugarcane stalk
One or several kinds of mixtures.
The preparation of batch technique of the mould for precision casting, is comprised the following steps that；
Step 1, silica flour and diatomite are separately immersed in 60-90 minutes in the hydrochloric acid that mass fraction is 18-25%, then will
Silica flour after immersion is immersed in 30-50 minutes in the ammoniacal liquor that mass fraction is 20-36%, by the diatomite and quartz after immersion
Powder is washed with deionized water to neutrality, obtains modification infusorial earth and modified silica flour；
Step 2, Salvia japonica is spontaneously dried, by bath raio 1：10-15 adds deionized water, immersion；Then sodium bicarbonate regulation is added
PH value is warming up to 80-100 degrees Celsius and constant temperature is kept for 60-90 minutes, cooling is filtered off except residue, obtains Salvia japonica to 7-9
Extract solution；
Step 3, by modified silica flour, schmigel, tetraethyl orthosilicate, titanium fiber, waterglass and stalk at 40-52 degrees Celsius
Ball milling and 8-36um excessively, obtain the first mixture in ball mill；
Step 4, polytetrafluoroethylene (PTFE) is heated to molten condition, sodium metasilicate is added in n-butanol and ultrasonic wave disperses 1.5-3
Hour, obtain sodium metasilicate alcoholic solution；
Step 5, by Salvia japonica extract solution, modification infusorial earth, the first mixture, sodium metasilicate alcoholic solution and melting polytetrafluoroethylene (PTFE)
Stirred in homogenizer, obtain the second mixture；
Step 6, the second mixture is incubated 1.5-3 hours at 670-770 degrees Celsius, then with 15-20 degrees celsius/minutes
Speed is warming up to 880-960 degrees Celsius and is incubated 2-4 hours, is then warming up to the speed of 25-30 degrees celsius/minutes
1360-1480 degrees Celsius and 6-8 hours are incubated, natural cooling obtains semi-finished product；
Step 7, semi-finished product are polished and bead, you can obtain finished product.
As the further scheme of the present invention：The mixing speed of step 5 high speed mixer is 1500-2100rpm, step
The frequency of ultrasonic wave is 20-40KHz in rapid four, and the power of ultrasonic wave is 860-980W.
Compared with prior art, the beneficial effects of the invention are as follows：Raw material sources of the present invention are extensive, and preparation technology is simple, system
Standby finished product still will not deform at a high temperature of 2250 degrees Celsius, ensure the dimensional accuracy of product, meet the use of people
Demand.
Embodiment
The technical scheme of this patent is described in more detail with reference to embodiment.
Embodiment 1
A kind of dispensing of mould for precision casting, include the raw material of following parts by weight：22 parts of silica flour, 16 parts of schmigel, positive silicon
1 part of acetoacetic ester, 2.2 parts of sodium metasilicate, 32 parts of diatomite, 7 parts of polytetrafluoroethylene (PTFE), 0.6 part of titanium fiber, 3 parts of waterglass, n-butanol 10
4.5 parts of part, 4 parts of stalk and Salvia japonica.The granularity of silica flour and schmigel is 0.45mm.
The preparation of batch technique of the mould for precision casting, is comprised the following steps that；
Step 1, silica flour and diatomite are separately immersed in the hydrochloric acid that mass fraction is 22% 75 minutes, after then soaking
Silica flour be immersed in mass fraction be 26% ammoniacal liquor in 42 minutes, by the diatomite after immersion and silica flour deionized water
Neutrality is washed till, obtains modification infusorial earth and modified silica flour；
Step 2, Salvia japonica is spontaneously dried, by bath raio 1：13 add deionized water, immersion；Then sodium bicarbonate regulation pH is added
It is worth 7.5, is warming up to 86 degrees Celsius and constant temperature is kept for 70 minutes, cooling is filtered off except residue, obtains Salvia japonica extract solution；
Step 3, by the ball milling of modified silica flour, schmigel, tetraethyl orthosilicate, titanium fiber, waterglass and stalk at 45 degrees Celsius
Ball milling and 15um excessively, obtain the first mixture in machine；
Step 4, polytetrafluoroethylene (PTFE) is heated to molten condition, sodium metasilicate is added in n-butanol and ultrasonic wave scattered 1.5 is small
When, obtain sodium metasilicate alcoholic solution；
Step 5, by Salvia japonica extract solution, modification infusorial earth, the first mixture, sodium metasilicate alcoholic solution and melting polytetrafluoroethylene (PTFE)
Stirred in homogenizer, obtain the second mixture；
Step 6, the second mixture is incubated 2.5 hours at 690 degrees Celsius, then heated up with the speed of 180 degrees celsius/minutes
To 910 degrees Celsius and 2 hours are incubated, then 1420 degrees Celsius is warming up to the speed of 25 degrees celsius/minutes and insulation 6 is small
When, natural cooling obtains semi-finished product；
Step 7, semi-finished product are polished and bead, you can obtain finished product.
Embodiment 2
A kind of dispensing of mould for precision casting, include the raw material of following parts by weight：24 parts of silica flour, 17 parts of schmigel, positive silicon
2.5 parts of acetoacetic ester, 2.9 parts of sodium metasilicate, 36 parts of diatomite, 10 parts of polytetrafluoroethylene (PTFE), 0.8 part of titanium fiber, 5 parts of waterglass, positive fourth
5.6 parts of 13 parts of alcohol, 6 parts of stalk and Salvia japonica.Stalk is using soybean stalk and the mixture of rice straw.
The preparation of batch technique of the mould for precision casting, is comprised the following steps that；
Step 1, silica flour and diatomite are separately immersed in the hydrochloric acid that mass fraction is 25% 80 minutes, after then soaking
Silica flour be immersed in mass fraction be 28% ammoniacal liquor in 42 minutes, by the diatomite after immersion and silica flour deionized water
Neutrality is washed till, obtains modification infusorial earth and modified silica flour；
Step 2, Salvia japonica is spontaneously dried, by bath raio 1：12 add deionized water, immersion；Then sodium bicarbonate regulation pH is added
It is worth 8.4, is warming up to 95 degrees Celsius and constant temperature is kept for 75 minutes, cooling is filtered off except residue, obtains Salvia japonica extract solution；
Step 3, by the ball milling of modified silica flour, schmigel, tetraethyl orthosilicate, titanium fiber, waterglass and stalk at 48 degrees Celsius
Ball milling and 25um excessively, obtain the first mixture in machine；
Step 4, polytetrafluoroethylene (PTFE) is heated to molten condition, sodium metasilicate is added in n-butanol and ultrasonic wave scattered 2.5 is small
When, obtain sodium metasilicate alcoholic solution；
Step 5, by Salvia japonica extract solution, modification infusorial earth, the first mixture, sodium metasilicate alcoholic solution and melting polytetrafluoroethylene (PTFE)
Stirred in homogenizer, obtain the second mixture；
Step 6, the second mixture is incubated 1.5 hours at 740 degrees Celsius, is then warming up to the speed of 20 degrees celsius/minutes
950 degrees Celsius and 3 hours are incubated, are then warming up to 1430 degrees Celsius with the speed of 30 degrees celsius/minutes and are incubated 7 small
When, natural cooling obtains semi-finished product；
Step 7, semi-finished product are polished and bead, you can obtain finished product.
Embodiment 3
A kind of dispensing of mould for precision casting, include the raw material of following parts by weight：26 parts of silica flour, 19 parts of schmigel, positive silicon
5 parts of acetoacetic ester, 3.5 parts of sodium metasilicate, 38 parts of diatomite, 11 parts of polytetrafluoroethylene (PTFE), 1.2 parts of titanium fiber, 5 parts of waterglass, n-butanol
6 parts of 13.6 parts, 7.2 parts of stalk and Salvia japonica.Stalk is using soybean stalk and the mixture of sugarcane stalk.
The preparation of batch technique of the mould for precision casting, is comprised the following steps that；
Step 1, silica flour and diatomite are separately immersed in the hydrochloric acid that mass fraction is 25% 80 minutes, after then soaking
Silica flour be immersed in mass fraction be 33% ammoniacal liquor in 40 minutes, by the diatomite after immersion and silica flour deionized water
Neutrality is washed till, obtains modification infusorial earth and modified silica flour；
Step 2, Salvia japonica is spontaneously dried, by bath raio 1：10 add deionized water, immersion；Then sodium bicarbonate regulation pH is added
It is worth 8.1, is warming up to 90 degrees Celsius and constant temperature is kept for 90 minutes, cooling is filtered off except residue, obtains Salvia japonica extract solution；
Step 3, by the ball milling of modified silica flour, schmigel, tetraethyl orthosilicate, titanium fiber, waterglass and stalk at 48 degrees Celsius
Ball milling and 32um excessively, obtain the first mixture in machine；
Step 4, polytetrafluoroethylene (PTFE) is heated to molten condition, sodium metasilicate is added in n-butanol and ultrasonic wave scattered 2 is small
When, the frequency of ultrasonic wave is 20KHz, and the power of ultrasonic wave is 880W, obtains sodium metasilicate alcoholic solution；
Step 5, by Salvia japonica extract solution, modification infusorial earth, the first mixture, sodium metasilicate alcoholic solution and melting polytetrafluoroethylene (PTFE)
Low whipping speed is to be stirred in 1800rpm homogenizer, obtains the second mixture；
Step 6, the second mixture is incubated 1.5 hours at 750 degrees Celsius, is then warming up to the speed of 20 degrees celsius/minutes
940 degrees Celsius and 3 hours are incubated, are then warming up to 1400 degrees Celsius with the speed of 30 degrees celsius/minutes and are incubated 6 small
When, natural cooling obtains semi-finished product；
Step 7, semi-finished product are polished and bead, you can obtain finished product.
Embodiment 4
A kind of dispensing of mould for precision casting, include the raw material of following parts by weight：28 parts of silica flour, 20 parts of schmigel, positive silicon
6 parts of acetoacetic ester, 4 parts of sodium metasilicate, 40 parts of diatomite, 12 parts of polytetrafluoroethylene (PTFE), 1.5 parts of titanium fiber, 6 parts of waterglass, n-butanol 15
7 parts of part, 8 parts of stalk and Salvia japonica.The granularity of silica flour and schmigel is 1.1mm.Stalk is using soybean stalk, rice straw
The mixture of stalk, broomcorn straw and sugarcane stalk.
The preparation of batch technique of the mould for precision casting, is comprised the following steps that；
Step 1, silica flour and diatomite are separately immersed in the hydrochloric acid that mass fraction is 22% 90 minutes, after then soaking
Silica flour be immersed in mass fraction be 34% ammoniacal liquor in 50 minutes, by the diatomite after immersion and silica flour deionized water
Neutrality is washed till, obtains modification infusorial earth and modified silica flour；
Step 2, Salvia japonica is spontaneously dried, by bath raio 1：15 add deionized water, immersion；Then sodium bicarbonate regulation pH is added
It is worth 8.8, is warming up to 95 degrees Celsius and constant temperature is kept for 90 minutes, cooling is filtered off except residue, obtains Salvia japonica extract solution；
Step 3, by the ball milling of modified silica flour, schmigel, tetraethyl orthosilicate, titanium fiber, waterglass and stalk at 52 degrees Celsius
Ball milling and 32um excessively, obtain the first mixture in machine；
Step 4, polytetrafluoroethylene (PTFE) is heated to molten condition, sodium metasilicate is added in n-butanol and ultrasonic wave scattered 3 is small
When, the frequency of ultrasonic wave is 40KHz, and the power of ultrasonic wave is 980W, obtains sodium metasilicate alcoholic solution；
Step 5, by Salvia japonica extract solution, modification infusorial earth, the first mixture, sodium metasilicate alcoholic solution and melting polytetrafluoroethylene (PTFE)
Low whipping speed is to be stirred in 2100rpm homogenizer, obtains the second mixture；
Step 6, the second mixture is incubated 3 hours at 770 degrees Celsius, is then warming up to the speed of 20 degrees celsius/minutes
960 degrees Celsius and 4 hours are incubated, are then warming up to 1480 degrees Celsius with the speed of 30 degrees celsius/minutes and are incubated 8 small
When, natural cooling obtains semi-finished product；
Step 7, semi-finished product are polished and bead, you can obtain finished product.
Comparative example 1
Except Salvia japonica is not contained, remaining component and preparation technology are same as Example 3.
Embodiment 1-4 product and the product of comparative example 1 are kept into 5-8 hours under 2250 degrees Celsius, product is taken out
Observed, observation the results are shown in Table 1.
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Comparative example 1 | |
| Whether deform | It is no | It is no | It is no | It is no | It is |
Embodiment 1-4 product is kept for a few houres do not deform at a high temperature of 2250 degrees Celsius as can be seen from Table 1, should
Mould can meet the requirement of people.It is acidified modified by being carried out to diatomite in the present invention, first acid is carried out to silica flour
The processing of alkali afterwards, can expand the microcellular structure of diatomite and silica flour, then coordinate Salvia japonica extract solution, can effectively control mould
The deformation of tool, coordinates the components such as titanium fiber, polytetrafluoroethylene (PTFE), waterglass in of the invention, the mould of making also has good make
With performance, ensure people's normal use.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (5)
1. a kind of dispensing of mould for precision casting, it is characterised in that include the raw material of following parts by weight：Silica flour 22-28 parts,
Schmigel 16-20 parts, tetraethyl orthosilicate 1-6 parts, sodium metasilicate 2.2-4 parts, diatomite 32-40 parts, polytetrafluoroethylene (PTFE) 7-12 parts, titanium
Fiber 0.6-1.5 parts, waterglass 3-6 parts, n-butanol 10-15 parts, stalk 4-8 parts and Salvia japonica 4.5-7 parts.
2. the dispensing of mould for precision casting according to claim 1, it is characterised in that the silica flour and schmigel
Granularity is 0.2-1.3mm.
3. the dispensing of mould for precision casting according to claim 1, it is characterised in that the stalk uses big beanstalk
One or several kinds of mixtures in stalk, rice straw, broomcorn straw and sugarcane stalk.
A kind of 4. preparation of batch technique of mould for precision casting as described in claim 1-3 is any, it is characterised in that tool
Body step is as follows：
Step 1, silica flour and diatomite are separately immersed in 60-90 minutes in the hydrochloric acid that mass fraction is 18-25%, then will
Silica flour after immersion is immersed in 30-50 minutes in the ammoniacal liquor that mass fraction is 20-36%, by the diatomite and quartz after immersion
Powder is washed with deionized water to neutrality, obtains modification infusorial earth and modified silica flour；
Step 2, Salvia japonica is spontaneously dried, by bath raio 1：10-15 adds deionized water, immersion；Then sodium bicarbonate regulation is added
PH value is warming up to 80-100 degrees Celsius and constant temperature is kept for 60-90 minutes, cooling is filtered off except residue, obtains Salvia japonica to 7-9
Extract solution；
Step 3, by modified silica flour, schmigel, tetraethyl orthosilicate, titanium fiber, waterglass and stalk at 40-52 degrees Celsius
Ball milling and 8-36um excessively, obtain the first mixture in ball mill；
Step 4, polytetrafluoroethylene (PTFE) is heated to molten condition, sodium metasilicate is added in n-butanol and ultrasonic wave disperses 1.5-3
Hour, obtain sodium metasilicate alcoholic solution；
Step 5, by Salvia japonica extract solution, modification infusorial earth, the first mixture, sodium metasilicate alcoholic solution and melting polytetrafluoroethylene (PTFE)
Stirred in homogenizer, obtain the second mixture；
Step 6, the second mixture is incubated 1.5-3 hours at 670-770 degrees Celsius, then with 15-20 degrees celsius/minutes
Speed is warming up to 880-960 degrees Celsius and is incubated 2-4 hours, is then warming up to the speed of 25-30 degrees celsius/minutes
1360-1480 degrees Celsius and 6-8 hours are incubated, natural cooling obtains semi-finished product；
Step 7, semi-finished product are polished and bead, you can obtain finished product.
5. mould for precision casting preparation of batch technique according to claim 4, it is characterised in that in the step 5
The mixing speed of homogenizer is 1500-2100rpm, and the frequency of ultrasonic wave is 20-40KHz in step 4, the work(of ultrasonic wave
Rate is 860-980W.
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| CN201711375295.0A CN107774878A (en) | 2017-12-19 | 2017-12-19 | The dispensing and its preparation technology of a kind of mould for precision casting |
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| CN201711375295.0A CN107774878A (en) | 2017-12-19 | 2017-12-19 | The dispensing and its preparation technology of a kind of mould for precision casting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108941439A (en) * | 2018-09-26 | 2018-12-07 | 安徽江杰实业有限公司 | A kind of foundry sand core material |
| CN113646107A (en) * | 2019-03-29 | 2021-11-12 | 旭有机材株式会社 | Mold material composition and method for producing mold using same |
| CN113646107B (en) * | 2019-03-29 | 2024-05-03 | 旭有机材株式会社 | Casting material composition and method for producing casting using same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108941439A (en) * | 2018-09-26 | 2018-12-07 | 安徽江杰实业有限公司 | A kind of foundry sand core material |
| CN113646107A (en) * | 2019-03-29 | 2021-11-12 | 旭有机材株式会社 | Mold material composition and method for producing mold using same |
| CN113646107B (en) * | 2019-03-29 | 2024-05-03 | 旭有机材株式会社 | Casting material composition and method for producing casting using same |
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