CN111264982A - Method for manufacturing cross coin - Google Patents
Method for manufacturing cross coin Download PDFInfo
- Publication number
- CN111264982A CN111264982A CN202010064824.0A CN202010064824A CN111264982A CN 111264982 A CN111264982 A CN 111264982A CN 202010064824 A CN202010064824 A CN 202010064824A CN 111264982 A CN111264982 A CN 111264982A
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- CN
- China
- Prior art keywords
- cross
- coin
- wax
- oil pressure
- embryo
- Prior art date
- 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
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C21/00—Coins; Emergency money; Beer or gambling coins or tokens, or the like
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C27/00—Making jewellery or other personal adornments
- A44C27/001—Materials for manufacturing jewellery
- A44C27/002—Metallic materials
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C27/00—Making jewellery or other personal adornments
- A44C27/001—Materials for manufacturing jewellery
- A44C27/002—Metallic materials
- A44C27/003—Metallic alloys
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/24—Pressing or stamping ornamental designs on surfaces
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Adornments (AREA)
Abstract
The invention discloses a manufacturing method of cross coins, which comprises a 3D picture design step, a 3D modeling step, a steel mould wax building step, a precise casting step, a polishing step, an oil pressure steel mould transformation step and an imprinting step. The cross coin product prepared by the method has the advantages of high precision, uniform product microstructure, high density, low precious metal raw material loss rate, low production cost and the like, is convenient to collect and store, and can be directly displayed in the display process without props.
Description
Technical Field
The invention relates to a manufacturing method of a cross coin.
Background
The commemorative coin is a coin issued for commemorating important events, outstanding characters, historical sites, ancient sites, rare animals and plants, sports events and the like in the aspects of politics, history, culture and the like of the international or the home country, and is mainly used for collection and exhibition. The commemorative coin is generally a round commemorative coin with small size, particularly a commemorative coin of noble metal, so that the following defects exist:
1. is not beneficial to preservation and easy to lose;
2. due to the limited size, the contained event content needing commemoration is limited and cannot be abundantly displayed;
3. the display process cannot be used for obviously placing the display or needs to be assisted by special display props.
Although the existing commemorative coins have various types, various shapes and patterns and no lack of competitive products. However, the overall shape is a cake, and the design, shape and material of the front and back sides are devised, which cannot meet the various living demands of people.
The noble metals used for manufacturing the noble metal commemorative coins (medals) generally include: gold, silver, platinum, rhodium, palladium, and alloys thereof. The current world coinage production is based on inheriting the traditional coinage process technology, combines the progress of the modern industrial technology, and applies a plurality of new process technologies in the coinage production, so that the coinage shape and the manufacture in the world are rich and colorful. Besides the traditional flat edges and screw teeth, the post-treatment process and the post-treatment technology such as polygonal, irregular, circular middle perforation, discontinuous screw teeth, continuous inclined screw teeth, dual-metal embedding, triple-metal embedding, partial embedding, edge lettering, edge groove lettering, screw tooth lettering, invisible carving, laser holography, color, particle fine points, sand blasting, partial coating and the like also appear. However, the basic forming process for coinage has heretofore been limited to the basic pattern of "embryo cake-embossed low relief pattern". Limited by the characteristics of the process mode, the commemorative coin (badge) is single in product form, the pattern is mainly a low-relief pattern, and the design is difficult to show greater flexibility.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a manufacturing method of a cross coin, which can be used for processing the cross coin, namely a cross souvenir coin, and the manufactured cross coin product has the advantages of high precision, uniform product microstructure, high density, low loss rate of precious metal raw materials, low production cost and the like, is convenient to collect and store, and can be directly displayed in the process of placing and displaying without props.
The technical scheme for realizing the purpose is as follows: a manufacturing method of a cross coin comprises the following steps:
s1, 3D graph design step: designing a 3D diagram of a cross coin, wherein the cross coin is composed of two round coins which are vertically and crossly arranged; determining the material, the diameter and the thickness of each piece of the round coin;
s2, 3D modeling step: 3D modeling is carried out by adopting 3D modeling software according to the 3D diagram of the cross coin, so as to obtain a 3D modeling structure of the cross coin;
s3, a steel mold wax building step: manufacturing a steel mould for casting and wax building of the cross coin according to the 3D modeling structure of the cross coin;
s4, precision casting: building cross wax through a steel mould by adopting a lost wax method precision casting process, putting the cross wax into the silica gel powder, dewaxing at a low temperature, roasting at a high temperature for 12 hours, and carrying out vacuum casting to obtain an embryo cake of the cross coin, wherein the blank cake is increased in density by vacuum casting, so that the surface of the prepared embryo cake of the cross coin is smooth and has no sand holes;
s5, grinding: polishing and grinding the blank cake;
s6, oil pressure steel die transformation: a cross-shaped groove is formed in the oil pressure steel die, and the size of the cross-shaped groove is the same as that of the embryo cake;
s7, embossing step: and (3) putting the embryo cakes into a cross-shaped groove on an oil pressure steel die for primary oil pressure, and turning the embryo cakes by 90 degrees for secondary oil pressure after the primary oil pressure is carried out to prepare the cross-shaped coins.
The cross coin is made of at least one of pure gold, pure silver, pure platinum, 18K gold, rose gold, 925 silver, silver copper, silver palladium, gold palladium and platinum gold.
In the above manufacturing method of the cross coin, in step S3, the steel mold for casting wax is reserved with a shrinkage ratio according to the material of the cross coin.
According to the manufacturing method of the cross coin, when the cross coin is made of pure silver, the reserved shrinkage rate of the steel die for casting wax building is 2%.
The manufacturing method of the cross coin is characterized in that the embryo cake is composed of two circular embryo cake bodies which are vertically crossed.
The cross coin product prepared by the method has the advantages of high precision, uniform product microstructure, high density, low precious metal raw material loss rate, low production cost and the like, is convenient to collect and store, and can be directly displayed in the display process without props.
Drawings
Fig. 1 is a perspective view of a cross coin.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description is given with reference to the accompanying drawings:
referring to fig. 1, a method for manufacturing a cross coin according to a preferred embodiment of the present invention includes the following steps:
s1, 3D graph design step: designing a 3D diagram of a cross coin 1, wherein the cross coin consists of two round coins 11 which are vertically and crossly arranged; determining the material, the diameter and the thickness of each piece of the round coin 11;
s2, 3D modeling step: 3D modeling is carried out by adopting 3D modeling software according to the 3D diagram of the cross coin, so as to obtain a 3D modeling structure of the cross coin; the 3D modeling software can adopt the computer software copyright registration certificate "noble metal jewelry drawing design software V1.0" of 2019SR0325955 of the applicant's shanghai dawn spring jewelry limited;
s3, a steel mold wax building step: manufacturing a steel mould for casting and wax building of the cross coin according to the 3D modeling structure of the cross coin; the steel die for casting wax construction reserves the shrinkage according to the material of the cross coin, for example, when the material of the cross coin is pure silver, the shrinkage reserved by the steel die for casting wax construction is 2%; the design of the pattern on the steel die for casting wax can adopt a computer software copyright registration certificate 'craft gift special engraving platform V1.0' of 2019SR0331032 of Shanghai Xiaoquan jewellery Co., Ltd; when the wax mold is manufactured, the wax is built by adopting silica gel traditionally, and the wax is molded by adopting steel in the invention, so that the manufactured wax mold is quite exquisite and does not need manual wax trimming;
s4, precision casting: building cross wax through a steel mould by adopting a lost wax method precision casting process, putting the cross wax into the silica gel powder, dewaxing at a low temperature, roasting at a high temperature for 12 hours, and carrying out vacuum casting to obtain an embryo cake of the cross coin, wherein the blank cake is increased in density by vacuum casting, so that the surface of the prepared embryo cake of the cross coin is smooth and has no sand holes; the embryo cake is composed of two circular embryo cake bodies which are vertically crossed, the manufactured embryo cake has no sand holes, the shrinkage rate is normal, and the material purity meets the requirement;
s5, grinding: polishing and grinding the blank cake;
s6, oil pressure steel die transformation: a cross-shaped groove is formed in the oil pressure steel die, and the size of the cross-shaped groove is the same as that of the embryo cake;
s7, embossing step: and (3) putting the embryo cakes into a cross-shaped groove on an oil pressure steel die for primary oil pressure, and turning the embryo cakes by 90 degrees for secondary oil pressure after the primary oil pressure is carried out to prepare the cross-shaped coins. In the embossing step, the computer software copyright registration certificate 'gold and silver ornament secret processing platform V1.0' of the registration number 2019SR0325172 of the Shanghai spring jewelry company of the applicant can be adopted for embossing control.
The surface of the cross coin can be designed by graphic printing, for example, the computer software copyright registration certificate 'jewelry surface printing gold and silver graphic device system V1.0' of the applicant's Shanghai spring jewelry company with the registration number of 2019SR 0328491' is adopted for pattern printing.
The cross coin is made of at least one of pure gold, pure silver, pure platinum, 18K gold, rose gold, 925 silver, silver copper, silver palladium, gold palladium and platinum gold.
In conclusion, the cross coin manufacturing method can be used for processing the cross coin, namely the cross commemorative coin, and the manufactured cross coin product has the advantages of high precision, uniform product microstructure, high density, low precious metal raw material loss rate, low production cost and the like, is convenient to collect and store, and can be directly displayed in the display process without props.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (5)
1. A manufacturing method of a cross coin is characterized by comprising the following steps:
s1, 3D graph design step: designing a 3D diagram of a cross coin, wherein the cross coin is composed of two round coins which are vertically and crossly arranged; determining the material, the diameter and the thickness of each piece of the round coin;
s2, 3D modeling step: 3D modeling is carried out by adopting 3D modeling software according to the 3D diagram of the cross coin, so as to obtain a 3D modeling structure of the cross coin;
s3, a steel mold wax building step: manufacturing a steel mould for casting and wax building of the cross coin according to the 3D modeling structure of the cross coin;
s4, precision casting: building cross wax through a steel mould by adopting a lost wax method precision casting process, putting the cross wax into the silica gel powder, dewaxing at a low temperature, roasting at a high temperature for 12 hours, and carrying out vacuum casting to obtain an embryo cake of the cross coin, wherein the blank cake is increased in density by vacuum casting, so that the surface of the prepared embryo cake of the cross coin is smooth and has no sand holes;
s5, grinding: polishing and grinding the blank cake;
s6, oil pressure steel die transformation: a cross-shaped groove is formed in the oil pressure steel die, and the size of the cross-shaped groove is the same as that of the embryo cake;
s7, embossing step: and (3) putting the embryo cakes into a cross-shaped groove on an oil pressure steel die for primary oil pressure, and turning the embryo cakes by 90 degrees for secondary oil pressure after the primary oil pressure is carried out to prepare the cross-shaped coins.
2. A method for manufacturing a cross coin according to claim 1, wherein the material of the cross coin is at least one of pure gold, pure silver, pure platinum, 18K gold, rose gold, 925 silver, silver copper, silver palladium, gold palladium and platinum gold.
3. A method for manufacturing a cross coin according to claim 1, wherein in step S3, the steel mold for casting wax is used to reserve shrinkage ratio according to the material of the cross coin.
4. A cross coin according to claim 3 wherein when the cross coin is made of pure silver, the predetermined shrinkage of the steel die for casting wax is 2%.
5. A method for producing a cross coin according to claim 1 wherein said embryo cake is composed of two circular embryo cake bodies arranged perpendicularly across each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010064824.0A CN111264982A (en) | 2020-01-20 | 2020-01-20 | Method for manufacturing cross coin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010064824.0A CN111264982A (en) | 2020-01-20 | 2020-01-20 | Method for manufacturing cross coin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111264982A true CN111264982A (en) | 2020-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010064824.0A Pending CN111264982A (en) | 2020-01-20 | 2020-01-20 | Method for manufacturing cross coin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111264982A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101810387A (en) * | 2009-12-11 | 2010-08-25 | 深圳市意地亚珠宝首饰设计有限公司 | Technical for manufacturing jewelry by using hard gold |
| CN105499505A (en) * | 2016-02-17 | 2016-04-20 | 屏山县天成精密铸造有限责任公司 | Manufacturing method for precision casting mould |
| CN105499502A (en) * | 2015-12-25 | 2016-04-20 | 宁夏新和新材科技有限公司 | Wax mould precision casting method for improving sealability of joint sealing device |
| CN108971902A (en) * | 2018-03-07 | 2018-12-11 | 深圳市金宝盈文化股份有限公司 | A kind of production method of noble metal products |
-
2020
- 2020-01-20 CN CN202010064824.0A patent/CN111264982A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101810387A (en) * | 2009-12-11 | 2010-08-25 | 深圳市意地亚珠宝首饰设计有限公司 | Technical for manufacturing jewelry by using hard gold |
| CN105499502A (en) * | 2015-12-25 | 2016-04-20 | 宁夏新和新材科技有限公司 | Wax mould precision casting method for improving sealability of joint sealing device |
| CN105499505A (en) * | 2016-02-17 | 2016-04-20 | 屏山县天成精密铸造有限责任公司 | Manufacturing method for precision casting mould |
| CN108971902A (en) * | 2018-03-07 | 2018-12-11 | 深圳市金宝盈文化股份有限公司 | A kind of production method of noble metal products |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200612 |
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| RJ01 | Rejection of invention patent application after publication |