CN108856647A - A kind of technique of investment wax casting silverware - Google Patents
A kind of technique of investment wax casting silverware Download PDFInfo
- Publication number
- CN108856647A CN108856647A CN201810661198.6A CN201810661198A CN108856647A CN 108856647 A CN108856647 A CN 108856647A CN 201810661198 A CN201810661198 A CN 201810661198A CN 108856647 A CN108856647 A CN 108856647A
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- CN
- China
- Prior art keywords
- wax
- casting
- mold
- gypsum
- silverware
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- 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
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The present invention relates to a kind of techniques of investment wax casting silverware, to the effect that：By deisgn product and casting aluminum dipping form, aluminum die is processed using CNC numerically controlled processing equipment, then forms stencil plate toward aluminum dipping form casting by wax injector, then-finishing stencil plate（Weld stencil plate）- kind of wax inserts mimeograph stencil（Weighing）- filling plaster cylinder-gypsum vacuumizes the-molten metal-casting of gypsum natural coagulation-baking gypsum-- demoulding cleaning gypsum-flushing, and the mouth of a river-product polishing-product surface post-processing clean-is cut in pickling.Present invention eliminates artificial mud to carve starting board, suppresses glue film by hand, draws the uncertain factor of wax control wall thickness and product weight by hand, and it is consistent to realize product appearance, and product weight is unified.
Description
Technical field
The present invention relates to fine aluminium die casting technical field more particularly to a kind of techniques of investment wax casting silverware.
Background technique
The mankind use the history of gold and silver implements, can trace back to the age in time immemorial.From having mankind's that day, just have pair
Yearning and pursuit of the beauty to wealth, then just there is the demand to noble metal article.With the development of the times, with noble metal device
The raising of object processing technology, traditional handicraft has turned to large-scale modernization industry production, no matter in technique, design
On, or in quality, management etc. all has accumulated experience abundant, and the noble metal products of production have very high technology
It is horizontal.
But in modern noble metal art work processing enterprise, the production to stereoscopic type is still with lost wax process
Main production.Previous tradition gold and silver article manufacture craft, includes the following steps：Play sample silver version extrudate in film laminator
Mould, then cured mould is outpoured in infusing cured machine, finishing wax-pattern (weldering wax-pattern)-planting wax tree (weighing), then cured mould is placed on gypsum cylinder mould,
Fill plaster cylinder-gypsum vacuumize-through high temperature lose it is cured plaster mold is made, the gold and silver noble metal that will melt into liquid pours into plaster mold
In, after noble metal is cooling in plaster mold, plaster mold is broken into pieces and takes out jewellery blank, then by jewellery blank file into
Row finishing, then the component produced by insert molding of various moulding, then polish, be eventually fabricated finished product.
On 06 27th, 2012, Chinese invention patent application publication No. CN102513505A, which is disclosed, a kind of efficiently, to be stopped loss
Noble-metal hollow three-dimensional oscillating piece manufacturing method.The invention in volume production using version in kind silver-colored as mother matrix, batch making wax-pattern, while right
Silver version in kind carries out pre-segmentation design, and silver-colored version in kind is pre-segmented into convenient for stamping forming several strips or sheet component, is adopted
There is the noble metal products component of strip or laminated structure with punch forming process batch micro operations, then by strip or sheet products portion
Part is spliced, is fixed, losing wax around solid wax-pattern, holding the completion product batch production of the processes such as mould.
Although above-mentioned technology can reduce process flow, it manufactures the noble metal products portion with strip or laminated structure
Part is repeated twice or more times this program at least, can just mass-produce finished product, and greatest drawback is duplicate work
Noble metal sprue gate is big in sequence, and loss is big, and process flow is cumbersome, can still waste a large amount of noble metal such as gold and silver resource.
Summary of the invention
It is an object of the present invention to solution disadvantage of the existing technology, the technique for proposing a kind of investment wax casting silverware.
The loss of gold and silver can be reduced, process flow is reduced, cost of manufacture is effectively reduced.
To achieve the goals above, present invention employs following technical solutions：A kind of technique of investment wax casting silverware, packet
Include following steps：
Step 1：Aluminum dipping form is designed with mold design by product design, CNC numerically controlled machine processes aluminum dipping form；
Step 2：Wax liquor is prepared, industrial wax is put into wax injector, is heated up to temperature 70 C or more, wax is made to melt into wax liquor；
Step 3：Aluminum dipping form prepares, and opens mold, release agent is coated in mold cavity, the thickness of release agent will control
0.05-0.08mm；
Step 4：Special circumstances, winter should preheat aluminum dipping form, and summer does not have to preheating；Mold can be put into die heater by preheating,
Mold temperature is preheated between 60 DEG C of -100 DEG C of degree；
Step 5：Mold assembling, is placed under wax injector；
Step 6：Die casting casting, after die casting is complete, it should place a period of time cooling, then open mold and take out wax
Plate；
Step 7：The peak of stencil plate is modified and the cleaning of casting mouth；The cleaning of mold；
Step 8：It plants trees：Kind wax inserts mimeograph stencil；
Step 9：Plaster cylinder is filled, gypsum vacuumizes, and allows plaster cylinder natural coagulation；
Step 10：Gypsum is baked, the wax tree inside gypsum is allowed to melt loss or gasification；
Step 11：Molten metal silvering solution, casting；
Step 12：Demoulding cleaning gypsum, is rinsed, pickling, and the mouth of a river is cut in cleaning；
Step 13：Hold mould polishing, the post-processing of silverware surface.
The formula of the release agent is by zinc oxide, sodium metasilicate and water composition, and composition quality proportioning is 5：0.8:100.
Selected mold materials are fine aluminium.
The silverware surface post-processing of selected step 13 is plating.
Further, the tree planting of step 8 is the product for welding stencil plate, then needs simply to splice stencil plate, then plant trees again.
The present invention bakes gypsum, allows the wax tree inside gypsum to melt loss or gasification, claims to lose wax process.
Innovative technology of the invention is the drafting computer product figure first using computer graphics software, using computer software into
The wall thickness of row product structure designs, and then designs the corresponding wax injection mould of its product, processes casting by CNC numerically controlled processing equipment
Mold, there are wax inlet or the mouths of a river on mold, casting link of directly having arrived, and eliminate artificial mud carving starting board, suppress by hand
The factors such as the uncertainty of glue film also eliminate the uncertain factor for drawing wax control wall thickness and product weight by hand, realize simultaneously
Product appearance is consistent, and product weight is unified.
The method of the present invention can be applied in production silverware, and silver-colored hollow three-dimensional goods of furniture for display rather than for use, bangle, necklace, pendant and earrings etc. are first
It adorns in product；Applicable moulding can be varied, such as round, calabash shaped, olive-shaped and ellipticity.
Detailed description of the invention
Fig. 1 process flow chart of the invention.
Specific embodiment
Implementation column one：
With reference to attached drawing 1, a kind of technique of investment wax casting silverware, steps are as follows：
Step 1：Aluminum dipping form is designed with mold design by product design, CNC numerically controlled machine processes aluminum dipping form；
Step 2：Wax liquor is prepared, industrial wax is put into wax injector, -90 DEG C of temperature 70 C or more is heated up to, wax is made to melt into wax liquor；
Step 3：Aluminum dipping form prepares, and opens mold, release agent is coated in mold cavity, the thickness of release agent will control
0.05-0.08mm；
Step 4：Special circumstances, winter should preheat aluminum dipping form, and summer does not have to preheating；Mold can be put into die heater by preheating,
Mold temperature is preheated between 60 DEG C of -100 DEG C of degree；
Step 5：Mold assembling, is placed under wax injector；
Step 6：Die casting casting, after die casting is complete, it should place a period of time cooling, then open mold and take out wax
Plate；
Step 7：The peak of stencil plate is modified and the cleaning of casting mouth；The cleaning of mold；
Step 8：It plants trees：Kind wax inserts mimeograph stencil
Step 9：Plaster cylinder is filled, the calcium plaster mixed slowly is injected along plaster cylinder, is vacuumized again after having filled calcium plaster, so
After allow gypsum natural coagulation to obtain plaster mold；
Step 10：The plaster cylinder mold mouth of a river is put into vacuum resistance furnace downward, bakes gypsum through high temperature, enables the wax tree inside gypsum
Melt outflow evaporation, to obtain hollow plaster mold；Plaster mold is put into furnace and is baked, drying is kept；Fancy goods goods of furniture for display rather than for use
Furnace temperature first rises to 720 DEG C and then rises again to furnace temperature to 350 DEG C -500 DEG C or so and casts again；
Step 11：When plaster mold baking draws to an end, the silver prepared is melted, is kept molten by, is kept the temperature to plaster mold
It finishes, plaster cylinder is taken out from furnace, the mouth of a river is put into suction pouring machine oral area upwards, casting, pours the control of coin silver temperature 1200
DEG C or more；
Step 12：After plaster mold after casting is placed 10~30 minutes naturally, it is put into cold water, blows gypsum, demoulding cleaning stone
Cream rinses, pickling, cleaning, cuts the mouth of a river, and peak adjusts weight；
Step 13：Hold mould polishing, sandblasting, silverware electroplating surface.
Implementation column two：
A kind of technique of investment wax casting silverware, steps are as follows：
Step 1：Aluminum dipping form is designed with mold design by product design, CNC numerically controlled machine processes aluminum dipping form；
Step 2：Wax liquor is prepared, industrial wax is put into wax injector, is heated up to 80 DEG C -100 DEG C or more of temperature, is needed when it is cold suitable
When promotion wax injector temperature；
Step 3：Aluminum dipping form prepares, and opens mold, release agent is coated in mold cavity, the thickness of release agent will control
0.05-0.08mm；
Step 4：Special circumstances, winter should preheat aluminum dipping form, and summer does not have to preheating；Mold can be put into die heater by preheating,
Mold temperature is preheated between 60 DEG C of -100 DEG C of degree；
Step 5：Mold assembling, is placed under wax injector；
Step 6：Die casting casting, after die casting is complete, it should place a period of time cooling, then open mold and take out wax
Plate；
Step 7：The peak of stencil plate is modified and the cleaning of casting mouth；The cleaning of mold；
Step 8：It plants trees：The product of stencil plate, simply splicing stencil plate are first welded, is then planted trees again；
Step 9：Plaster cylinder is filled, gypsum vacuumizes, and allows plaster cylinder natural coagulation；
Step 10：Gypsum is baked, the wax tree allowed inside gypsum melts big and thin craft decoration furnace temperature and first rises to 800 DEG C even
It is higher（Suitable product size increases temperature）Then it rises again 720 DEG C or so to furnace temperature and casts again；
Step 11：Molten metal silvering solution, casting pour the control of coin silver temperature at 1300 DEG C -1500 DEG C or more；
Step 12：Demoulding cleaning gypsum, is rinsed, pickling, and the mouth of a river is cut in cleaning；
Step 13：Hold mould polishing, sandblasting, the post-processing of silverware surface（Plating）.
Two real column obtain brief summary in summary：
1. after aluminum die designs, to modify aluminum dipping form, removal processing Li Jiao, chamfering, avoid demoulding difficulty when casting, together
When casting when need to stamp release agent to aluminum die；
2. wintry weather is cold, wax injector dewaxing material temperature degree is appropriate will to be improved to 80 DEG C -100 DEG C；It is also pre- to mold simultaneously
Heat（Mould temperature preheats 60-100 DEG C）It just can be carried out casting；
3. fancy goods goods of furniture for display rather than for use successful data, furnace temperature rises to 720 DEG C first, and the furnace temperature such as subsequent are risen again to 350 DEG C -500 when casting
Silver-colored casting DEG C is carried out again, and silver temperature is 1200 DEG C or more；
4. encountering big teapot, big goods of furniture for display rather than for use, big and thin goods of furniture for display rather than for use when casting, it should adjustment promotion appropriate, furnace temperature and Yin Wen's
Temperature, 720 DEG C or more again of general control furnace temperature, Yin Wen casts at 1300 DEG C -1500 DEG C or more；
5. casting rate controls when casting, have at the uniform velocity, suitable product size weight, acceleration/deceleration appropriate, but it is necessary
It to remain a constant speed after acceleration/deceleration；Prevent product poured short or casting rate is too fast and product surface wrinkles；
The casting parameter:Furnace temperature:It 720 DEG C -900 DEG C, rises again：500 DEG C of -720 DEG C of casting silver temperature：1300-1500℃；
20 square centimeters of product table area with wall thickness 0.6-1.5mm product：
Cast parameter:Furnace temperature:It 900 DEG C, rises again：720 DEG C of casting silver temperature：1300-1500 DEG C or more.
Claims (5)
1. a kind of technique of investment wax casting silverware, it is characterised in that include the following steps：
Step 1：Aluminum dipping form is designed with mold design by product design, CNC numerically controlled machine processes aluminum dipping form；
Step 2：Wax liquor is prepared, industrial wax is put into wax injector, is heated up to temperature 70 C or more, wax is made to melt into wax liquor；
Step 3：Aluminum dipping form prepares, and opens mold, release agent is coated in mold cavity, the thickness of release agent will control
0.05-0.08mm；
Step 4：Special circumstances, winter should preheat aluminum dipping form, and summer does not have to preheating；Mold can be put into die heater by preheating,
Mold temperature is preheated between 60 DEG C of -100 DEG C of degree；
Step 5：Mold assembling, is placed under wax injector；
Step 6：Die casting casting, after die casting is complete, it should place a period of time cooling, then open mold and take out wax
Plate；
Step 7：The peak of stencil plate is modified and the cleaning of casting mouth；The cleaning of mold；
Step 8：It plants trees：Kind wax inserts mimeograph stencil；
Step 9：Plaster cylinder is filled, gypsum vacuumizes, and allows plaster cylinder natural coagulation；
Step 10：Gypsum is baked, the wax tree inside gypsum is allowed to melt loss or gasification；
Step 11：Molten metal silvering solution, casting；
Step 12：Demoulding cleaning gypsum, is rinsed, pickling, and the mouth of a river is cut in cleaning；
Step 13：Hold mould polishing, the post-processing of silverware surface.
2. a kind of technique of investment wax casting silverware according to claim 1, it is further characterized in that：The release agent is matched
Side is by zinc oxide, sodium metasilicate and water composition, and composition quality proportioning is 5：0.8:100.
3. a kind of technique of investment wax casting silverware according to claim 1, it is further characterized in that：The mold materials
For fine aluminium.
4. a kind of technique of investment wax casting silverware according to claim 1, it is further characterized in that：The step 13
The post-processing of silverware surface is plating.
5. a kind of technique of investment wax casting silverware according to claim 1, it is further characterized in that：The plant of the step 8
Tree is the product for welding stencil plate, then needs simply to splice stencil plate, then plant trees again.
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| CN201810661198.6A CN108856647A (en) | 2018-06-25 | 2018-06-25 | A kind of technique of investment wax casting silverware |
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| CN201810661198.6A CN108856647A (en) | 2018-06-25 | 2018-06-25 | A kind of technique of investment wax casting silverware |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114536505A (en) * | 2022-02-18 | 2022-05-27 | 中国地质大学（武汉） | Method for manufacturing ceramic jewelry |
| CN115319020A (en) * | 2022-08-02 | 2022-11-11 | 东莞市粤鑫雕塑工程有限公司 | Wax pattern production process based on metal sculpture |
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| CN101147954A (en) * | 2007-10-29 | 2008-03-26 | 福建省建阳市汽车锻压件厂 | Investment precision casting process for producing automobile I-shaped front shaft |
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| CN114536505A (en) * | 2022-02-18 | 2022-05-27 | 中国地质大学（武汉） | Method for manufacturing ceramic jewelry |
| CN115319020A (en) * | 2022-08-02 | 2022-11-11 | 东莞市粤鑫雕塑工程有限公司 | Wax pattern production process based on metal sculpture |
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