Process for casting metal jewelry by using organic matter

Abstract

The invention discloses a process for casting metal jewelry by using organic matters. The invention relates to the technical field of jewelry casting. The process comprises the following steps: S1, carrying out drying and shade drying treatment on an organic matter to be cast; s2, the to-be-cast organic matter is sprayed with varnish; s3, organic matter to be cast is connected to the wax tree core through a wax rod to obtain a wax tree; s4, the planted wax tree is placed in a container, gypsum slurry is injected into the container, the gypsum slurry submerges the wax tree, vacuumizing operation is conducted on the gypsum slurry, and after the gypsum slurry is naturally solidified, roasting is conducted to dissolve the wax tree, so that a hollow gypsum mold is obtained; and S5, after metal is molten, casting, cooling and gypsum frying are sequentially conducted, then a metal tree is obtained, the metal tree is cleaned, a casting is cut, and the jewelry piece is obtained after a mold is held. Organic matter casting is directly used, the process is suitable for batch production, the process is simple, and the manufactured bionic modeling is vivid and vivid and has uniqueness.

Description

Technical Field

[0001] The invention relates to the technical field of jewelry casting, in particular to a metal jewelry casting process using organic matter casting. Background Art

[0002] Bionic jewelry is very popular in the market. The manufacturing method generally adopts manual wax carving or 3D modeling wax spraying technology. First, a wax version of bionic shapes such as insects and leaves is obtained, and then it is cast into metal. For example, Chinese patents CN112207230B-A lost wax molding process for metal jewelry and CN114769510B-A method for lost wax casting of jewelry both disclose that a wax mold is first prepared and then connected to a wax tree through a wax stick. However, the above methods have the disadvantages of being time-consuming and the modeling is not vivid. Summary of the invention

[0003] The purpose of the present invention is to provide a metal jewelry casting process using organic casting to address the above-mentioned deficiencies in the prior art.

[0004] A metal jewelry casting process using organic casting of the present invention comprises the following steps:

[0005] S1, drying and shade-drying the organic matter to be cast to make its moisture content 0-10%;

[0006] S2, spraying the organic object to be cast with varnish so that the varnish layer is evenly attached to the surface of the organic object to be cast;

[0007] S3, according to the shape of the organic matter to be cast processed in step S2, using casting wax to make a nozzle, so that the organic matter to be cast is connected with a wax stick, and then the wax stick is connected to the wax tree core to obtain a wax tree;

[0008] S4, placing the planted wax tree in a container, injecting gypsum slurry into the container, wherein the gypsum slurry covers the wax tree and is 2 cm higher than the top of the wax tree, vacuumizing the gypsum slurry, and baking the gypsum slurry after the gypsum slurry solidifies naturally, so that the wax tree dissolves, thereby obtaining a hollow gypsum mold;

[0009] S5, after melting the metal, sequentially performing the steps of casting, cooling, and plaster blasting, thereafter obtaining a metal tree, cleaning the metal tree, cutting the casting, and obtaining the jewelry piece after holding the mold;

[0010] Among them, the roasting mechanism in step S4 is as follows: roasting at 115-125 degrees Celsius for 85-95 minutes; roasting at 415-425 degrees Celsius for 115-125 minutes; roasting at 630-640 degrees Celsius for 235-245 minutes; taking out and using a vacuum cleaner to suck out the residual powder inside; roasting again in the furnace, and roasting at 680 degrees Celsius for 30 minutes. The first stage is to bake at 115-125 degrees Celsius for 85-95 minutes to fully dry the moisture in the gypsum mold. If the temperature is too low and the time is too short, the moisture in the gypsum mold cannot be fully dried. If the temperature is too high and the time is too long, the mold will crack. The second stage is to bake at 415-425 degrees Celsius for 115-125 minutes to heat and solidify the gypsum mold and heat and burn the organic castings in the mold. If the temperature is too low and the time is too short, the mold cannot be solidified and the casting cannot be heated and burned. If the temperature is too high and the time is too long, the mold will crack. The third stage is to bake at 630-640 degrees Celsius for 235-245 minutes The purpose is to fully heat the organic casting in the mold and burn it into ashes. If the temperature is too low and the time is too short, the organic casting in the mold cannot be fully burned. If the temperature is too high and the time is too long, it will cause cracks in the plaster mold. Take out the residual powder inside with a vacuum cleaner. The purpose is to remove the ashes remaining after the organic casting in the mold is heated and baked. In the fourth stage, it is put into the furnace for baking again. The baking time is 680 degrees Celsius for 30 minutes. The purpose is to heat the plaster mold to a temperature that can cast metal solution. If the temperature is too low and the time is too short, the mold temperature is too low and cannot withstand the high-temperature metal melt poured, which will cause the mold to rupture. If the temperature is too high and the time is too long, it will cause cracks in the mold.

[0011] Furthermore, the organic matter to be cast includes any part of animals or plants, shells, and insects.

[0012] Furthermore, the drying temperature is 37-80 degrees Celsius, and the duration is 2-6 hours; the organic matter to be cast is insects, and the drying temperature is 37-40 degrees Celsius.

[0013] Furthermore, if the organic matter to be cast is a part of an animal or an insect with a high fat content, step S1 further includes degreasing the organic matter to be cast and then drying and air-drying it.

[0014] Furthermore, the degreasing treatment is to immerse the organic matter to be cast in anhydrous ethanol for 1-2 weeks, take it out, clean it and adjust its posture.

[0015] Furthermore, the organic matter to be cast is insects, and the temperature of drying and re-drying does not exceed 40 degrees Celsius.

[0016] Furthermore, the casting gypsum powder and water are mixed and stirred in a mass ratio of 3-5:1-2 to obtain the gypsum slurry.

[0017] Furthermore, the gypsum slurry is subjected to a vacuum treatment before being injected into the container to extract the air inside the gypsum slurry.

[0018] Furthermore, the shade drying treatment is to place it in a shade drying room with an air humidity of 8% and shade dry it for 12 hours.

[0019] Furthermore, in step S5, when the casting is cooled to 300 degrees Celsius, it is placed in cold water for blasting.

[0020] The present invention directly uses a metal casting process for casting organic matter, and the production thereof omits the steps of carving or modeling according to organic biological shapes in the existing process, and directly uses organic matter for casting. The process is suitable for mass production, and the process is simple, and the bionic shapes produced are vivid, lifelike, and unique. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The photos of the organic matter to be cast and the prepared castings used in Example 1;

[0022] Figure 2 The photos of the organic matter to be cast and the prepared castings used in Example 2;

[0023] Figure 3 The photos of the organic matter to be cast and the prepared castings used in Comparative Example 1;

[0024] Figure 4 These are photos of the organic material to be cast and the prepared casting used in Comparative Example 2. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] Example 1

[0027] The organic matter to be cast is crab legs.

[0028] Drying treatment: Use a variable frequency heating drying furnace to dry the organic matter to be cast, the temperature is 37 degrees Celsius, the duration is 2-6 hours (adjust according to the humidity and size of the organic matter to be cast); then place the organic matter to be cast in a shade drying room with an air humidity of 8% for shade drying. Use a moisture tester to test the moisture content of the organic matter to be cast, and the moisture content is up to standard when it is 0-10%.

[0029] Degrease the insects: soak them in anhydrous ethanol for 1-2 weeks (adjust according to the size and fat content of the organic matter to be cast), take them out, clean them and adjust their posture.

[0030] Second drying treatment: Use a variable frequency heating drying furnace to dry the organic matter to be cast, the temperature is 37 degrees Celsius, and the duration is 2-6 hours. Place the organic matter to be cast in a shade drying room with an air humidity of 8% for shade drying. Use a moisture tester to test the moisture content of the organic matter to be cast, and the moisture content is up to standard when it is 0-10%.

[0031] Waterproof curing treatment: In a fume hood, spray the organic material to be cast with varnish 2-3 times to ensure that it is evenly attached to the surface of the organic material to be cast, and wait for it to dry;

[0032] Making wax trees: insert the casting wax stick into the rubber base of the jewelry casting steel bell; according to the shape of the organic matter to be cast, use casting wax to make a sprue to connect the organic matter to be cast with the wax stick to complete the wax tree making; connect the jewelry casting steel bell with the rubber base and wrap it with tape;

[0033] Preparation of gypsum slurry: Mix the casting gypsum powder and water and stir evenly. The ratio of powder to water in the gypsum slurry is 5:2.

[0034] Vacuum treatment of gypsum slurry: Place the gypsum slurry in a vacuum machine. After the vacuum machine starts working, when the instrument shows that the internal air pressure is 0.08-0.1 MPa, continue running for 1 minute to extract the air inside the gypsum slurry.

[0035] Pouring plaster slurry: Pour the plaster slurry into the jewelry casting steel bell, so that the plaster slurry submerges the wax tree and is 2 cm higher than the top of the wax tree.

[0036] Vacuum treatment: Place the cast jewelry steel bell in a vacuum machine. After the vacuum machine starts working, when the instrument shows that the internal air pressure is 0.08-0.1 MPa, continue running for 2 minutes to extract the internal air.

[0037] Shade drying: Place it in a shade drying room with an air humidity of 8% and shade dry it for 12 hours.

[0038] Calcination in the furnace: Place it in the calcination furnace: calcine at 115 degrees Celsius for 85 minutes; calcine at 415 degrees Celsius for 115 minutes; calcine at 640 degrees Celsius for 245 minutes, take it out and use a vacuum cleaner to suck out the residual powder inside; calcine again in the furnace, calcine at 680 degrees Celsius for 30 minutes.

[0039] Metal casting: Place the calcined casting into a vacuum casting machine for casting.

[0040] Cleaning: When the casting cools to 300 degrees Celsius, put it in cold water and rinse it. Take out the casting. Use a high-pressure water gun to clean it in one step.

[0041] The castings prepared are as follows Figure 1 shown.

[0042] Example 2

[0043] The organic matter to be cast is leaves.

[0044] Drying treatment: Use a variable frequency heating drying furnace to dry the organic matter to be cast, the temperature is 37 degrees Celsius, the duration is 2-6 hours (adjust according to the humidity and size of the organic matter to be cast); then place the organic matter to be cast in a shade drying room with an air humidity of 8% for shade drying. Use a moisture tester to test the moisture content of the organic matter to be cast, and the moisture content is up to standard when it is 0-10%.

[0045] Waterproof curing treatment: In a fume hood, spray the organic material to be cast with varnish 2-3 times to ensure that it is evenly attached to the surface of the organic material to be cast, and wait for it to dry;

[0046] Making wax trees: insert the casting wax stick into the rubber base of the jewelry casting steel bell; according to the shape of the organic matter to be cast, use casting wax to make a sprue to connect the organic matter to be cast with the wax stick to complete the wax tree making; connect the jewelry casting steel bell with the rubber base and wrap it with tape;

[0047] Preparation of gypsum slurry: Mix the foundry gypsum powder and water evenly. The ratio of foundry gypsum powder to water is 3:1.

[0048] Vacuum treatment of gypsum slurry: Place the gypsum slurry in a vacuum machine. After the vacuum machine starts working, when the instrument shows that the internal air pressure is 0.08-0.1 MPa, continue running for 1 minute to extract the air inside the gypsum slurry.

[0049] Pouring plaster slurry: Pour the plaster slurry into the jewelry casting steel bell, so that the plaster slurry submerges the wax tree and is 2 cm higher than the top of the wax tree.

[0050] Vacuum treatment: Place the cast jewelry steel bell in a vacuum machine. After the vacuum machine starts working, when the instrument shows that the internal air pressure is 0.08-0.1 MPa, continue running for 2 minutes to extract the internal air.

[0051] Shade drying: Place it in a shade drying room with an air humidity of 8% and shade dry it for 12 hours.

[0052] Put it into the furnace for roasting: Place it in the roasting furnace: roast at 120 degrees Celsius for 90 minutes; roast at 420 degrees Celsius for 120 minutes; roast at 630 degrees Celsius for 240 minutes, take it out and use a vacuum cleaner to suck out the residual powder inside, put it into the furnace again; roast again, roast at 680 degrees Celsius for 30 minutes.

[0053] Metal casting: Place the calcined casting into a vacuum casting machine for casting.

[0054] Cleaning: When the casting cools to 300 degrees Celsius, put it in cold water and rinse it. Take out the casting. Use a high-pressure water gun to clean it in one step.

[0055] The castings prepared are as follows Figure 2 shown.

[0056] Comparative Example 1

[0057] Roasting in the furnace:

[0058] Place it in a roasting furnace: roast at 120 degrees Celsius for 60 minutes; roast at 420 degrees Celsius for 90 minutes; roast at 630 degrees Celsius for 240 minutes, take it out and use a vacuum cleaner to suck out the residual powder inside, and put it back into the furnace; roast again, roast at 680 degrees Celsius for 30 minutes.

[0059] The other parts are the same as in Example 2, but the castings prepared are as follows Figure 3 As shown. Figure 3 It can be seen that the casting has cracks.

[0060] Comparative Example 2

[0061] Roasting in the furnace:

[0062] Place it in a roasting furnace: roast at 120 degrees Celsius for 90 minutes; roast at 420 degrees Celsius for 60 minutes; roast at 580 degrees Celsius for 240 minutes, take it out and use a vacuum cleaner to suck out the residual powder inside, and put it back into the furnace; roast again, roast at 680 degrees Celsius for 30 minutes.

[0063] The other parts are the same as in Example 2, but the castings prepared are as follows Figure 4 As shown. Figure 4 It can be seen that the casting preparation failed.

[0064] For matters not mentioned above, the prior art applies.

[0065] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art to which the present invention belongs may make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but they will not deviate from the direction of the present invention or exceed the scope defined by the attached claims. Those skilled in the art should understand that any modifications, equivalent substitutions, improvements, etc. made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the present invention.

Claims

1. A metal jewelry casting process using organic casting, characterized in that: The steps include: S1, drying and shade-drying the organic matter to be cast to make its moisture content 0-10%; S2, spraying the organic object to be cast with varnish so that the varnish layer is evenly attached to the surface of the organic object to be cast; S3, according to the shape of the organic matter to be cast processed in step S2, using casting wax to make a nozzle, so that the organic matter to be cast is connected with a wax stick, and then the wax stick is connected to the wax tree core to obtain a wax tree; S4, turning over the planted wax tree and placing it in a container, injecting gypsum slurry into the container, wherein the gypsum slurry covers the wax tree and is 2 cm higher than the top of the wax tree, vacuumizing the gypsum slurry, and after the gypsum slurry solidifies naturally, baking it to dissolve the wax tree, thereby obtaining a hollow gypsum mold; S5, after melting the metal, sequentially performing the steps of casting, cooling, and plaster blasting, thereafter obtaining a metal tree, cleaning the metal tree, cutting the casting, and obtaining the jewelry piece after holding the mold; Among them, the roasting mechanism in step S4 is as follows: roasting at 115-125 degrees Celsius for 85-95 minutes; roasting at 415-425 degrees Celsius for 115-125 minutes; roasting at 630-640 degrees Celsius for 235-245 minutes; taking out and using a vacuum cleaner to suck out the residual powder inside; roasting again in the furnace, and roasting at 680 degrees Celsius for 30 minutes.

2. The metal jewelry casting process using organic casting as claimed in claim 1, characterized in that: The organic matter to be cast includes any part of animals or plants, shells, and insects.

3. The metal jewelry casting process using organic casting as claimed in claim 2, characterized in that: The drying temperature is 37-80 degrees Celsius, and the duration is 2-6 hours; the organic matter to be cast is insects, and the drying temperature is 37-40 degrees Celsius.

4. The metal jewelry casting process using organic casting as claimed in claim 1, characterized in that: The organic matter to be cast is a part of an animal or an insect with a high fat content, and step S1 further includes degreasing the organic matter to be cast and then drying and air-drying it.

5. The metal jewelry casting process using organic casting as claimed in claim 4, characterized in that: The degreasing treatment is to immerse the organic matter to be cast in anhydrous ethanol for 1-2 weeks, take it out, clean it and adjust its posture.

6. The metal jewelry casting process using organic casting as claimed in claim 5, characterized in that: The organic matter to be cast is insects, and the drying and re-drying temperatures do not exceed 40 degrees Celsius.

7. The metal jewelry casting process using organic casting as claimed in claim 1, characterized in that: The casting gypsum powder and water are mixed and stirred evenly in a mass ratio of 3-5:1-2 to obtain the gypsum slurry.

8. The metal jewelry casting process using organic casting as claimed in claim 1, characterized in that: The gypsum slurry is vacuumed before being injected into the container to extract the air inside the gypsum slurry.

9. The metal jewelry casting process using organic casting as claimed in claim 1, characterized in that: The shade drying treatment is to place it in a shade drying room with an air humidity of 8% and shade dry it for 12 hours.

10. The metal jewelry casting process using organic casting as claimed in claim 1, characterized in that: In step S5, when the casting is cooled to 300 degrees Celsius, it is placed in cold water for blasting and washing.

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