CN112108610A - Precision casting process of copper ware casting - Google Patents
Precision casting process of copper ware casting Download PDFInfo
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- CN112108610A CN112108610A CN202010768929.4A CN202010768929A CN112108610A CN 112108610 A CN112108610 A CN 112108610A CN 202010768929 A CN202010768929 A CN 202010768929A CN 112108610 A CN112108610 A CN 112108610A
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- Prior art keywords
- wax
- copper
- mold
- casting
- finished product
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Classifications
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- 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
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
- C23C14/081—Oxides of aluminium, magnesium or beryllium
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a precision casting process of a copper ware casting, and relates to the technical field of copper ware manufacturing. A precise casting process for the copper casting includes such steps as cleaning the water in the cavity of mould, stably pouring the molten wax in wax tank along the inner surface of mould, cooling, taking out the wax mould, removing burr from its surface, and quickly immersing it in the molten wax to uniformly coat a layer of wax on its surface. The invention makes the surface of the casting smooth and clean and has more accurate dimension by manufacturing the film shell E, and can be realized by only reserving a small amount of machining allowance for precise parts with higher dimension requirements, and simultaneously greatly saves copper metal materials.
Description
Technical Field
The invention relates to the technical field of copper ware manufacturing, in particular to a precision casting process of a copper ware casting.
Background
The bronze ware is made of copper alloy, the earliest bronze ware appears in the ancient Babylon river basin before 6000 years, is a worldwide civilization symbol in the bronze era of the human civilization period, the casting range of the bronze ware is a cooker, a tableware, a wine ware, a water heater and the like, a large-scale copper knife carved with a lion image in the Sumeier civilization period is a representative of the early bronze ware, and the Chinese bronze ware is made into exquisite ware and enjoys extremely high reputation and artistic value in the world.
In the modern high-speed development of science and technology, the copper ware can be used for manufacturing ornaments and can be manufactured into various shapes in various fields for use, meanwhile, the requirements on the manufacturing shape and the precision of the copper ware product are higher and higher, and meanwhile, the copper ware is easy to oxidize, so that the precision casting process of the uniform copper ware casting is provided.
Disclosure of Invention
The invention aims to provide a precision casting process of a copper ware casting, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a precision casting process of a copper ware casting comprises the following casting steps:
s1: wiping water in a mold cavity by using a part, further stably and statically injecting wax liquid in a wax melting barrel along the inner wall of the mold, stopping after filling, when the wax liquid in the mold is cooled, the upper end level is sharply reduced, supplementation is required, further cooling the mold and the uncooled wax liquid by water, taking out the wax mold after cooling, removing burrs on the surface of the wax mold, and simultaneously rapidly immersing the wax mold into the molten wax liquid to uniformly coat a layer of wax liquid on the surface of the wax mold so as to fill holes and cracks to obtain a wax mold A;
s2: cleaning oil stains and impurities on the surface of the wax pattern A by using acetone for 5-10 minutes, and airing the cleaned wax pattern A to obtain a wax pattern B;
s3: slowly immersing the wax pattern B into a coating bucket filled with the coating in an inclined direction for infiltration, avoiding bubbles during infiltration, drawing out the wax pattern B after infiltration is finished, carefully checking whether all parts are uniformly covered, whether all holes and sharp corners are blocked or not, blowing the holes and the sharp corners away by air, blowing off the attached bubbles, rotating the wax pattern B without dripping to ensure that the surface coating is uniform, coating sand by a sand drenching machine, and standing for a period of time and drying when the first layer of mortar sand is obtained to obtain a wax pattern C;
s4: dipping the wax pattern C into silica sol, taking out, dripping the silica sol for 30-90 seconds, coating a second layer of mortar sand on the wax pattern C without dripping according to the step S3, standing for a period of time, and drying to obtain a wax pattern D;
s5: placing the wax mould D into a dewaxing cage, wherein the dewaxing temperature is at least 160 ℃, the dewaxing time is at least 10 minutes, and the wax mould D reaches a mould shell E after dewaxing is finished;
s6: placing the mold shell E into a shell burning furnace, wherein the shell burning temperature is 1000-1200 ℃, the shell burning time is at least 50 minutes, and taking out and cooling after sintering to obtain a mold shell F;
s7: pouring the molten copper into a mould shell F, and cooling to obtain a semi-finished product G;
s8: crushing and removing a formwork F outside the semi-finished product G, removing a sprue of the semi-finished product G in a cutting mode, further removing the surface defect of the semi-finished product G in a grinding and repairing mode, and further polishing the semi-finished product H;
s9: and plating a film for preventing the oxidation of a copper ware on the surface of the semi-finished product H by adopting a physical vapor deposition method to obtain a finished product J.
Furthermore, the temperature of the wax melting barrel in the step S1 is controlled at 100-120 ℃, and when water cooling is carried out, water cannot enter the inside of the wax liquid.
Further, the standing and drying time of the first layer of mortar in the step S3 is at least 4 hours, the standing and drying time of the second layer of mortar in the step S4 is at least 8 hours, and the coating in the step 3 is a mixture of fatty alcohol-polyoxyethylene ether, zirconium powder and silica sol.
Furthermore, in the step S7, during pouring, the pouring cup is filled with the molten copper, the molten copper is kept at a certain speed, and the occurrence of flow interruption or the pouring speed is not suddenly fast or slow, and during pouring, dross is not poured into the mold together with the molten steel, and filtration or a slag stopping measure is considered, and the pouring is kept dry, so as to avoid casting defects such as air holes and the like caused by gas entering during pouring.
Further, the polishing mesh of the copper tool surface mentioned in the step S8 should not be less than 500 meshes.
Further, in the step S8, a membrane shell crusher is used to mechanically crush the formwork F.
Furthermore, the material of the film in the step S9 is aluminum oxide.
Compared with the prior art, the invention has the beneficial effects that:
(1) the precision casting process of the copper ware casting has the advantages that the surface of the casting is smooth and clean, the size is accurate, high precision parts with the size requirement can be machined only by leaving a small amount of machining allowance, and meanwhile, copper metal materials are greatly saved.
(2) According to the precise casting process of the copper ware casting, the surface of the semi-finished product H is plated with the aluminum oxide film through a physical vapor deposition method, so that the surface of the copper ware casting is isolated from oxygen, the surface of the copper ware casting is prevented from being oxidized, and the precise physical size of the copper ware casting can be kept for a long time.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A precision casting process of a copper ware casting comprises the following casting steps:
s1: wiping water in a mold cavity by using a part, further stably and statically injecting wax liquid in a wax melting barrel along the inner wall of the mold, stopping after filling, when the wax liquid in the mold is cooled, the upper end level is sharply reduced, supplementation is required, further cooling the mold and the uncooled wax liquid by water, taking out the wax mold after cooling, removing burrs on the surface of the wax mold, and simultaneously rapidly immersing the wax mold into the molten wax liquid to uniformly coat a layer of wax liquid on the surface of the wax mold so as to fill holes and cracks to obtain a wax mold A;
s2: cleaning oil stains and impurities on the surface of the wax pattern A by using acetone for 8 minutes, and airing the cleaned wax pattern A to obtain a wax pattern B;
s3: slowly immersing the wax pattern B into a coating bucket filled with the coating in an inclined direction for infiltration, avoiding bubbles during infiltration, drawing out the wax pattern B after infiltration is finished, carefully checking whether all parts are uniformly covered, whether all holes and sharp corners are blocked or not, blowing the holes and the sharp corners away by air, blowing off the attached bubbles, rotating the wax pattern B without dripping to ensure that the surface coating is uniform, coating sand by a sand drenching machine, and standing for a period of time and drying when the first layer of mortar sand is obtained to obtain a wax pattern C;
s4: dipping the wax pattern C into silica sol, taking out, dripping the silica sol for 50 seconds, coating a second layer of mortar sand on the wax pattern C which does not drip any more according to the step S3, standing for a period of time, and drying to obtain a wax pattern D;
s5: placing the wax mould D into a dewaxing cage, wherein the dewaxing temperature is at least 160 ℃, the dewaxing time is 10 minutes, and the wax mould D is placed into a mould shell E after dewaxing is finished;
s6: placing the mould shell E into a shell burning furnace, wherein the shell burning temperature is 1100 ℃, the shell burning time is 60 minutes, and taking out and cooling after sintering to obtain a mould shell F;
s7: pouring the molten copper into a mould shell F, and cooling to obtain a semi-finished product G;
s8: crushing and removing a formwork F outside the semi-finished product G, removing a sprue of the semi-finished product G in a cutting mode, further removing the surface defect of the semi-finished product G in a grinding and repairing mode, and further polishing the semi-finished product H;
s9: and plating a film for preventing the oxidation of a copper ware on the surface of the semi-finished product H by adopting a physical vapor deposition method to obtain a finished product J.
Furthermore, the temperature of the wax melting barrel in the step S1 is controlled at 110 ℃, and when water cooling is carried out, water cannot enter the inside of the wax liquid.
Further, the standing and drying time of the first layer of mortar in the step S3 is 5 hours, the standing and drying time of the second layer of mortar in the step S4 is 8 hours, and the coating in the step 3 is a mixture of 0.01 wt% of fatty alcohol-polyoxyethylene ether, 80 wt% of zirconium powder and 20 wt% of silica sol.
Furthermore, in the step S7, during pouring, the pouring cup is filled with the molten copper, the molten copper is kept at a certain speed, and the occurrence of flow interruption or the pouring speed is not suddenly fast or slow, and during pouring, dross is not poured into the mold together with the molten steel, and filtration or a slag stopping measure is considered, and the pouring is kept dry, so as to avoid casting defects such as air holes and the like caused by gas entering during pouring.
Further, the polishing mesh of the copper tool surface mentioned in the step S8 is 600 meshes.
Further, in the step S8, a membrane shell crusher is used to mechanically crush the formwork F.
Furthermore, the material of the film in the step S9 is aluminum oxide.
| Test items | Standard requirement value (mm) | Actual measured value (mm) |
| Diameter of | 10.00-10.10 | 10.04 |
| Length of | 82.90-83.00 | 82.95 |
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The precision casting process of the copper ware casting is characterized by comprising the following steps of: the casting steps are as follows:
s1: wiping water in a mold cavity by using a part, further stably and statically injecting wax liquid in a wax melting barrel along the inner wall of the mold, stopping after filling, when the wax liquid in the mold is cooled, the upper end level is sharply reduced, supplementation is required, further cooling the mold and the uncooled wax liquid by water, taking out the wax mold after cooling, removing burrs on the surface of the wax mold, and simultaneously rapidly immersing the wax mold into the molten wax liquid to uniformly coat a layer of wax liquid on the surface of the wax mold so as to fill holes and cracks to obtain a wax mold A;
s2: cleaning oil stains and impurities on the surface of the wax pattern A by using acetone for 5-10 minutes, and airing the cleaned wax pattern A to obtain a wax pattern B;
s3: slowly immersing the wax pattern B into a coating bucket filled with the coating in an inclined direction for infiltration, avoiding bubbles during infiltration, drawing out the wax pattern B after infiltration is finished, carefully checking whether all parts are uniformly covered, whether all holes and sharp corners are blocked or not, blowing the holes and the sharp corners away by air, blowing off the attached bubbles, rotating the wax pattern B without dripping to ensure that the surface coating is uniform, coating sand by a sand drenching machine, and standing for a period of time and drying when the first layer of mortar sand is obtained to obtain a wax pattern C;
s4: dipping the wax pattern C into silica sol, taking out, dripping the silica sol for 30-90 seconds, coating a second layer of mortar sand on the wax pattern C without dripping according to the step S3, standing for a period of time, and drying to obtain a wax pattern D;
s5: placing the wax mould D into a dewaxing cage, wherein the dewaxing temperature is at least 160 ℃, the dewaxing time is at least 10 minutes, and the wax mould D reaches a mould shell E after dewaxing is finished;
s6: placing the mold shell E into a shell burning furnace, wherein the shell burning temperature is 1000-1200 ℃, the shell burning time is at least 50 minutes, and taking out and cooling after sintering to obtain a mold shell F;
s7: pouring the molten copper into a mould shell F, and cooling to obtain a semi-finished product G;
s8: crushing and removing a formwork F outside the semi-finished product G, removing a sprue of the semi-finished product G in a cutting mode, further removing the surface defect of the semi-finished product G in a grinding and repairing mode, and further polishing the semi-finished product H;
s9: and plating a film for preventing the oxidation of a copper ware on the surface of the semi-finished product H by adopting a physical vapor deposition method to obtain a finished product J.
2. The precision casting process of a copper casting according to claim 1, wherein: and in the step S1, the temperature of the wax melting barrel is controlled at 100 ℃ and 120 ℃, and when water cooling is carried out, water cannot enter the wax liquid.
3. The precision casting process of a copper casting according to claim 1, wherein: and in the step S3, the standing and drying time of the first layer of mortar is at least 4 hours, in the step S4, the standing and drying time of the second layer of mortar is at least 8 hours, and in the step 3, the coating is a mixture of fatty alcohol-polyoxyethylene ether, zirconium powder and silica sol.
4. The precision casting process of a copper casting according to claim 1, wherein: in the step S7, during pouring, the pouring cup is filled with the molten copper, the molten copper is kept at a certain speed, and the occurrence of flow break or the speed of pouring is prohibited, and during pouring, dross is not poured into the casting mold together with the molten steel, and filtration or a slag stopping measure is considered, and the pouring is kept dry, so as to avoid casting defects such as air holes and the like caused by gas entering during pouring.
5. The precision casting process of a copper casting according to claim 1, wherein: the polishing mesh of the copper tool surface mentioned in the step S8 should not be less than 500 mesh.
6. The precision casting process of a copper casting according to claim 1, wherein: and in the step S8, a membrane shell crusher is adopted to mechanically crush the formwork F.
7. The precision casting process of a copper casting according to claim 1, wherein: and the material of the film in the step S9 is aluminum oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010768929.4A CN112108610A (en) | 2020-08-03 | 2020-08-03 | Precision casting process of copper ware casting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010768929.4A CN112108610A (en) | 2020-08-03 | 2020-08-03 | Precision casting process of copper ware casting |
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| CN112108610A true CN112108610A (en) | 2020-12-22 |
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| CN202010768929.4A Pending CN112108610A (en) | 2020-08-03 | 2020-08-03 | Precision casting process of copper ware casting |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834845A (en) * | 2014-03-10 | 2014-06-04 | 安徽厚林神雕金属艺术品有限公司 | Copper alloy for precision casting of artwork, and preparation method and method for precision casting |
| CN105057593A (en) * | 2015-07-30 | 2015-11-18 | 宁波天业精密铸造有限公司 | Investment casting technology for copper alloy casting |
| CN109759543A (en) * | 2019-01-04 | 2019-05-17 | 丁勇 | A kind of copper casted sculpture method for casting production |
-
2020
- 2020-08-03 CN CN202010768929.4A patent/CN112108610A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834845A (en) * | 2014-03-10 | 2014-06-04 | 安徽厚林神雕金属艺术品有限公司 | Copper alloy for precision casting of artwork, and preparation method and method for precision casting |
| CN105057593A (en) * | 2015-07-30 | 2015-11-18 | 宁波天业精密铸造有限公司 | Investment casting technology for copper alloy casting |
| CN109759543A (en) * | 2019-01-04 | 2019-05-17 | 丁勇 | A kind of copper casted sculpture method for casting production |
Non-Patent Citations (2)
| Title |
|---|
| 282975922: "熔模精密铸造讲解", 《淘豆网》 * |
| 张而耕: "《机械工程材料》", 31 October 2017, 上海科学技术出版社 * |
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Application publication date: 20201222 |
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