KR102393830B1 - How to manufacture jewelry using a 3D printer - Google Patents

Abstract

The present invention relates to a method for manufacturing an accessory by using a three-dimensional (3D) printer. More specifically, a 3D printer is used to output a model of an accessory to be manufactured, join the outputted model in a shape of a tree, fix the same to a flask and then pour gypsum to manufacture a gypsum mold for manufacturing a jewelry, wherein heating temperature of the gypsum mold is controlled to a proper temperature to remove a model installed therein while the gypsum is cured, thereby preventing the gypsum mold from being deformed due to melting of the model when the gypsum is not completely cured or evaporation of the model melted by high temperature. The method for manufacturing an accessory by using a 3D printer according to the present invention comprises: a 3D printing step of outputting a model of a product to be formed by using a 3D printer; a gypsum mold manufacturing step of manufacturing a gypsum mold by using the model outputted in the 3D printing step; a material melting and infusion step of curing the gypsum mold manufactured in the gypsum mold manufacturing step and melting and removing the outputted model, and then melting and infusing precious metals into the gypsum mold; a curing step of curing the melted material infused into the gypsum mold; a gypsum mold removing step of melting and removing the gypsum mold with water when the material is cured; and a finishing step of cutting the material from which the gypsum mold is removed into pieces and performing finishing.

Description

How to manufacture jewelry using a 3D printer

The present invention relates to a method of manufacturing an ornament using a 3D printer, and more particularly, after outputting a model of an ornament to be manufactured using a 3D printer, combining the output model in a tree shape, and fixing it in a flask In manufacturing a gypsum mold for manufacturing precious metals by pouring gypsum, by controlling the heating temperature of the gypsum mold to an appropriate temperature to cure the gypsum while stably removing the model installed inside, the model is melted while the gypsum is not completely hardened. It relates to a method of manufacturing ornaments using a 3D printer, which can prevent the shape of the plaster mold from being deformed or the shape of the plaster mold from being damaged by vaporization of the model melted by high temperature.

In general, in manufacturing ornaments, a model of a specific shape is manufactured with a material that melts such as paraffin, connected in a tree shape, poured with gypsum, and then the model is removed while curing the gypsum by heating to manufacture a mold.

Then, the precious metal is melted and injected, and as it is hardened, the precious metal is injected into the molten model site and hardened to make jewelry.

After that, when the gypsum mold is removed with water, the parts of the ornament are manufactured in the form of a model connected in the form of a tree at first, and by cutting, combining and connecting these parts, it is possible to manufacture it as an ornament.

However, due to the difference between the temperature at which the model is melted and the temperature at which the plaster is hardened, the shape of the plaster mold is deformed or the plaster mold is damaged by melting and vaporization of the model.

In addition, since it is impossible to apply heat evenly throughout, a difference occurs between the melting temperature of the model and the curing temperature of the gypsum on the opposite side to the part where heat is applied, which causes a problem in that it cannot be manufactured into a precise gypsum mold.

In relation to this, in Prior Document 1 (Registration Patent No. 10-1601615, miniaturized and lightweight mesh-type ornaments manufacturing method and ornaments manufactured by the manufacturing method), the configuration of manufacturing mesh-type ornaments using the output of the mesh-type structure is described. has been disclosed.

However, in Prior Document 1, due to the mesh-like structure, it is difficult for gypsum with high viscosity to flow into the mold when manufacturing a mold using gypsum, and accordingly, it is difficult to mold into a sophisticated shape, and the shape of the ornament to be molded is also not elaborate. do.

In addition, when removing the gypsum after completing the molding of the ornament, it is difficult to remove the gypsum introduced into the mesh-type thrust material, and thus the time required for washing is delayed.

And if the temperature control is not accurate when hardening the gypsum and removing the printed material, the printed material is quickly removed. There are problems such as losing.

Prior Document 1 (Registration Patent 10-1601615 Method for manufacturing miniaturized and light-weighted mesh-type ornaments and ornaments manufactured by the manufacturing method)

The present invention has been devised to solve the above problems, and by using a 3D printer to precisely output a model, and to manufacture a plaster mold using this, it can be manufactured into an ornamental part having an elaborate shape, and the output while curing the plaster mold A method of manufacturing ornaments using a 3D printer that can reduce the incidence of defects and improve the quality of finished products by repeatedly heating and reducing temperature to an appropriate temperature when removing is intended to provide

A method of manufacturing an ornament using a 3D printer according to an embodiment of the present invention for solving the above problems is a 3D printing step (S100) of outputting the shape of a product to be molded using a 3D printer, the 3D printing step (S100) ) in the gypsum mold manufacturing step (S200) of manufacturing a gypsum mold using the output output from the gypsum mold manufacturing step (S200), while curing the gypsum mold manufactured in the above step (S200) by melting and removing the output, then melting and injecting the precious metal into the gypsum mold The material melting and injection step (S300), the curing step (S400) of hardening the molten material injected into the gypsum mold, the gypsum mold removal step (S500) of melting and removing the gypsum mold with water when the material is hardened, and the gypsum mold is removed It is characterized in that it comprises a finishing step (S600) of individually cutting the finished material and finishing it.

Here, the gypsum mold manufacturing step (S200) is a 3D output fixing step (S210) of connecting a plurality of outputs (P) outputted with a 3D printer in a tree shape and fixing them in a flask (F), and the 3D output (P) is A gypsum injection step (S220) of injecting gypsum into the fixed flask (F) and a heat treatment step (S230) of melting and removing the output (P) while curing the gypsum by applying heat in a state in which the gypsum is injected do it with

At this time, in the heat treatment step (S230), the output (P) is fixed and the flask (F) injected with gypsum is put in the electric furnace 100, and the heating step of heating the temperature of the electric furnace 100 to 1200 °C ( S231), the first temperature reduction step of reducing the temperature of the heated electric furnace to 500 ℃ (S232), the temperature increasing step (S233) of increasing the temperature of the electric furnace to 700 ℃, and the temperature of the heated electric furnace 100 to reduce the temperature to 570 ℃ It is characterized in that it comprises a secondary temperature reduction step (S234).

In the method for manufacturing ornaments using a 3D printer according to an embodiment of the present invention, in manufacturing ornaments using a plaster cast, when removing the output for molding a product while curing the plaster, deformation or deformation while curing the plaster appropriately It is possible to prevent damage and remove the printouts, and accordingly, the shape of the plaster mold can be precisely molded, thereby increasing the quality of the product.

1 is an overall process diagram showing a method of manufacturing an ornament using a 3D printer according to an embodiment of the present invention;
Figure 2 is a perspective view showing a state in which the output output to the 3D printer is combined in a tree shape and a plaster mold in the method for manufacturing an ornament using a 3D printer according to an embodiment of the present invention;
3 is a process diagram specifically showing the steps of manufacturing a plaster mold in a method for manufacturing an ornament using a 3D printer according to an embodiment of the present invention;
4 is a process diagram specifically showing a heat treatment step in a method for manufacturing an ornament using a 3D printer according to an embodiment of the present invention;
5 is a perspective view showing the configuration of an electric furnace used in the heat treatment step in the method for manufacturing ornaments using a 3D printer according to an embodiment of the present invention;
6 is a cross-sectional view showing the configuration of an electric furnace used in the heat treatment step in the method for manufacturing ornaments using a 3D printer according to an embodiment of the present invention;
7 is a process diagram in which a water cooling step is further included in the first temperature reduction step in the method for manufacturing an ornament using a 3D printer according to an embodiment of the present invention;
8 is a cross-sectional view illustrating a state in which a cooling unit is further provided in an electric furnace used for a heat treatment step in a method for manufacturing an ornament using a 3D printer according to an embodiment of the present invention;
9 is a process diagram further including a step of forcibly discharging residues in the heat treatment step in the method for manufacturing ornaments using a 3D printer according to an embodiment of the present invention;
10 is an exemplary view illustrating a state in which a residue discharge unit is further provided in an electric furnace in a method for manufacturing an ornament using a 3D printer according to an embodiment of the present invention;

The present invention relates to a method for manufacturing ornaments using a 3D printer, and in particular, a sophisticated plaster mold while preventing deformation or damage to the shape of the plaster mold by efficiently controlling the temperature setting in the heat treatment step of removing the output while curing the plaster mold It is characterized in that it is possible to increase the quality of the product manufactured by the plaster mold and molded by the gypsum mold.

Hereinafter, a method of manufacturing an ornament using a 3D printer according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall process diagram showing a method for manufacturing an ornament using a 3D printer according to an embodiment of the present invention, and FIG. It is a perspective view showing a state of being combined in a tree shape and a plaster frame.

1 and 2, the present invention is a 3D printing step (S100) of modeling the shape of a product to be molded and outputting it as a model using a 3D printer and the output output in the 3D printing step (S100) A plaster mold manufacturing step (S200) of manufacturing a plaster mold having a space in the form of an output (P) by removing the output while fixing the plaster in a flask, where the plaster is poured and heated, while curing is included.

At this time, a curing resin is used as a material for outputting the output from the 3D printer, and a photocurable polyurethane copolymer, bisphenol A ethoxylate di(meth)acrylate, (meth)acrylate-based monomer, and photoinitiator are used. A curing resin containing is used.

Here, the photoinitiator is bis-acylphosphine oxide, phenylphosphine oxide, 2,4,6-trimethylbenzoyldiphenyl phosphine oxide (2,4,6-trimethylbenzoyldi phenylphosphine oxide) , monoacrylphosphine, alpha-hydroxyketone (σ-Hydroxyketone), alpha-aminoketone (-Aminoketone), (O-ethoxycarboxy)oxime), acetophenone ), phenyl glyoxylic, Michler's ketone, sulfonium timonate, sulfonium phosphonate, metallocene, oligomeric alpha- Hydroketone (Oligomeric-hydroxyketone), thioxanthone (Thioxanthone), benzoyl-sulfide (Benzoyl-sulphide), benzophenone (Benzophenone), aminobenzoate (Amino-benzoate) and hydroxycyclohexylphenyl ketone (Hydroxycyclohexylketone) consisting of It includes at least one selected from the group.

And while heating the gypsum mold manufactured in the gypsum mold manufacturing step (S200), a material melting and injection step (S300) of melting and injecting precious metal into the space of the output (P) shape formed inside the gypsum mold.

Thereafter, the precious metal can be molded into the shape of an output, including a curing step (S400) of hardening the material melted and injected into the gypsum mold in the material melting and injection step (S300).

After that, when the material is hardened in the curing step (S400), the plaster mold (G) is melted and removed using water, and the plaster remaining between the hardened materials is removed by spraying high-pressure water (S500). Included.

When the gypsum is completely removed from the noble metal material molded through the gypsum mold removal step (S500), it is individually cut and configured to include a finishing step (S600) of finishing treatment through polishing and washing.

As a result, it is possible to manufacture a product by casting jewelry or accessories in the shape of an object precisely printed with a 3D printer with precious metal.

3 is a process diagram specifically showing the steps of manufacturing a plaster mold in a method for manufacturing an ornament using a 3D printer according to an embodiment of the present invention.

Referring to Figure 3, the plaster mold manufacturing step (S200), a 3D output fixing step (S210) of combining a plurality of outputs (P) in a tree shape and fixing them to a flask (F), and the output (P) A gypsum injection step (S220) of injecting gypsum into the flask (F) in a state fixed to the flask (F) and a heat treatment step (S230) of melting and removing the output (P) while curing the gypsum by heating is done by

In this plaster mold manufacturing step (S200), the output (P) is melted and discharged by the discharge hole formed in the lower part of the plaster mold (G), and is manufactured as a plaster mold emptied in the shape of the output, the plaster mold (G) As the discharge hole from which the output is discharged is blocked when the precious metal is melted and injected, the molten precious metal is cured without leaking and can be manufactured into accessories or parts.

Due to this, it is possible to manufacture a plaster mold in which a space of a shape in which a plurality of outputs are connected in a tree shape is formed.

4 is a process diagram specifically illustrating a heat treatment step in a method for manufacturing an ornament using a 3D printer according to an embodiment of the present invention.

4, in the heat treatment step (S230), the output (P) is fixed and the flask (F) injected with gypsum is put in the electric furnace 100, and the temperature of the electric furnace 100 is heated to 1200 ° C. a heating step (S231), a first temperature reduction step (S232) of reducing the temperature of the heated electric furnace to 500 °C, a temperature increase step (S233) of increasing the temperature of the electric furnace to 700 °C, and the temperature of the heated electric furnace (100) It is made including a second temperature reduction step (S234) of reducing the temperature back to 570 ℃.

As described above, as the temperature of the electric furnace is initially heated to a high temperature of 1200 ℃, the gypsum is hardened quickly, and when the heat is transferred to the output (P) inside the plaster mold (G) along with the curing of the gypsum, the output is also rapidly melted and removed, , when the temperature of the electric furnace 100 is reduced to 500° C. through the first temperature reduction step (S232), the plaster mold (G) is more firmly cured.

After that, it is possible to remove all the residues inside the plaster mold (G) while vaporizing and removing the melted output from the inside of the plaster mold by increasing the temperature again to 700 ° C. After that, the temperature of the electric furnace 100 is again restored to 570 ° C. The plaster mold (G) in a state in which the output (P) is all removed by the second temperature reduction step (S234) is completed.

By setting the temperature as described above, the shape of the gypsum mold (G) is deformed as the output (P) is melted before the gypsum is completely hardened. It is possible to manufacture a more sophisticated gypsum mold (G) by preventing the shape of the damage.

5 is a perspective view showing the configuration of an electric furnace used in the heat treatment step in the method for manufacturing ornaments using a 3D printer according to an embodiment of the present invention, and FIG. 6 is a method for manufacturing ornaments using a 3D printer according to an embodiment of the present invention. It is a cross-sectional view showing the configuration of the electric furnace used in the heat treatment step.

5 and 6, the electric furnace 100 used in the heat treatment step (S230) in the present invention is formed in a shape corresponding to the outer periphery of the flask (F), so that the entire outside of the flask (F) is evenly A separate heating chamber 110 is provided for heating.

In this individual heating chamber 110, a heater 120 in the form of spirally surrounding the flask F along the outer periphery of the flask F is installed.

And an insulating cover ( 130) is further provided.

In addition, each of the individual heating chambers 110 is provided with a control unit 140 for collectively controlling the temperature of the individual heating chamber 110 according to the temperature measured by a temperature sensor (not shown) installed in the control unit 140 . By detecting the internal temperature of the individual heating chamber 110 in real time and maintaining it at a set appropriate temperature, precise temperature control and control are possible.

On the other hand, when the flask (F) is inserted into the individual heating chamber 110 in the lower portion of the individual heating chamber 110, the flask is inserted at a predetermined distance from the heater 120 and spaced apart from the heater 120 to guide the flask to the correct position. A position guidance inclined surface 111 is further provided.

In addition, the lower portion of the flask (F) is formed with an inclined surface to correspond to the induction inclined surface (111) in place, the flask (F) is guided to the correct position by the induction inclined surface (111) in place, and the individual heating chamber (110) It is possible to insert into the correct position so as to be evenly spaced as a whole from the heater position.

7 is a process diagram in which a water cooling step is further included in the first temperature reduction step in the method for manufacturing an ornament using a 3D printer according to an embodiment of the present invention, and FIG. It is a cross-sectional view showing a state in which a cooling unit is further provided in the electric furnace used for the heat treatment step in the method.

7 and 8 , the first temperature reduction step ( S232 ) further includes a water cooling step ( S232a ) capable of rapidly reducing the temperature inside the individual heating chamber 110 by injecting cooling water into the individual heating chamber 110 . can

The water cooling step (S232a) is provided in a spiral shape along the inner circumference of the individual heating chamber 110 and when the cooling water is injected into the cooling water circulation pipe 150 through which the cooling water can be circulated, the cooling water is circulated along the cooling water circulation pipe 150. The temperature inside the individual heating chamber 110 can be reduced more quickly.

9 is a process diagram further including a step of forcibly discharging residues in the heat treatment step in the method for manufacturing an ornament using a 3D printer according to an embodiment of the present invention, and FIG. 10 is an ornament using a 3D printer according to an embodiment of the present invention. It is an embodiment diagram showing a state in which the electric furnace is further provided with a residue discharge unit in the manufacturing method.

9 and 10, in the second temperature reduction step (S234), the molten output is not discharged, and the residue is forcibly discharged by spraying air into the remaining plaster mold (G) to discharge the residue (S234a) may be further included.

In the forcibly discharging residue step (S234a), the molten output product remaining inside the plaster mold (G) by inserting the residue discharge unit 160 into the empty space inside the plaster mold (G) in the second temperature reduction step (S234) can be removed by air blowing.

The residue discharge part 160 is formed in plurality along the outer periphery of the air injection tube 161 for injecting air from the outside, the air injection tube 161, a predetermined interval in the longitudinal direction of the air injection tube (161). It is spaced apart and provided in parallel with a plurality of air injection nozzles 162 for spraying the air injected from the air injection pipe 161 toward the inside of the plaster mold (G).

Here, a nozzle protection cover 163 is provided at the upper end of the air injection pipe 161 to prevent the output material that is melted and discharged from the inside of the plaster mold G from flowing into the air injection nozzle 162 .

And the lower end of the air injection pipe 161 is provided with a lifting unit 164 that can elevate the air injection pipe 161 to the inside of the gypsum mold (G) to be drawn out and lowered.

The lifting unit 164 is connected to the lower end of the air injection pipe 161 at the lifting cylinder 164a for operating the air injection pipe 161 to be raised and lowered, and from the lifting shaft end of the lifting cylinder 164a to the lower end of the lifting cylinder 164a. A lifting bar 164b for elevating the air injection tube 161 according to the operation of the cylinder 164a and a speed controller 164c capable of adjusting the speed at which the air injection tube 161 is raised and lowered according to the heat treatment situation is comprised of

The air injection pipe 161 , the air injection nozzle 162 , and the nozzle protective cover 163 that are drawn into and out of the high-temperature plaster mold G from the residue discharge unit 160 have low thermal conductivity and high melting folds. It is preferably made of iron material.

The thermal conductivity of iron is 62 ㎉/℃, and the melting point is 1535℃, so it can be operated without deformation or melting even when the inside of the electric furnace is in a high temperature state. while being able to use it.

Due to this, the quality of the molded product can be improved by forcibly discharging the remaining foreign substances so as not to remain inside the plaster mold (G).

The present invention made as described above uses the output output using a 3D printer to manufacture a plaster mold in the form of an ornament or accessory part to be produced, and using this to manufacture an ornament in the casting method, plaster is placed in a flask in which the output is fixed When a plaster mold is manufactured by pouring and melted and removed while the gypsum is hardened, the elaborate plaster mold can be removed while preventing damage and deformation of the plaster mold by setting the temperature.

100: electric furnace 110: individual heating room
111: direct induction slope 120: heater
130: insulation cover 140: control unit
150: cooling water circulation pipe 160: residue discharge part
161: air injection pipe 162: air injection nozzle
163: nozzle protective cover 164: elevating part
164a: lifting cylinder 164b: lifting bar
164c: speed controller F: flask
P : Printout G : Plaster mold

Claims (3)

3D printing step (S100) of outputting the shape of the product to be molded using a 3D printer;
A plaster mold manufacturing step (S200) of manufacturing a plaster mold using the output output in the 3D printing step (S100);
A material melting and injection step (S300) of melting and injecting a precious metal into a gypsum mold after melting and removing the output while curing the gypsum mold manufactured in the gypsum mold manufacturing step (S200);
A curing step of curing the molten material injected into the plaster mold (S400);
When the material is cured, the plaster mold removal step (S500) of dissolving the plaster mold with water and removing the plaster mold and the finishing step (S600) of individually cutting the material in the state in which the plaster mold is removed and finishing it (S600); In including,
The plaster mold manufacturing step (S200) is a 3D output fixing step (S210) of connecting a plurality of outputs (P) output with a 3D printer in a tree shape and fixing them to a flask (F), and a 3D output (P) is fixed It includes a gypsum injection step (S220) of injecting gypsum into the flask (F) and a heat treatment step (S230) of melting and removing the output (P) while curing the gypsum by applying heat in the state in which the gypsum is injected,
The heat treatment step (S230) is a heating step (S231) of putting the flask (F) in which the output (P) is fixed and the gypsum is injected into the electric furnace 100, and heating the temperature of the electric furnace 100 to 1200 °C (S231) , a primary temperature reduction step of reducing the temperature of the heated electric furnace to 500 ° C (S232), a temperature increasing step (S233) of increasing the temperature of the electric furnace to 700 ° C. and a secondary temperature reduction of the temperature of the heated electric furnace 100 to 570 ° C. Including a temperature reduction step (S234),
The first temperature reduction step (S232) is a water cooling step ( S232a) is further included,
The secondary temperature reduction step (S234) further includes a forced residual discharge step (S234a) of discharging the residues by spraying air into the plaster mold (G) remaining without the molten output being discharged,
In the forcibly discharging residue step (S234a), the molten output product remaining inside the plaster mold (G) by inserting the residue discharge unit 160 into the empty space inside the plaster mold (G) in the second temperature reduction step (S234) is removed by air blowing,
The residue discharge part 160 is formed in plurality along the outer periphery of the air injection pipe 161 for injecting air from the outside, the air injection pipe 161, a predetermined interval in the longitudinal direction of the air injection pipe (161). A method of manufacturing ornaments using a 3D printer, characterized in that it includes an air jet nozzle 162 spaced apart and provided in parallel with a plurality of air injection nozzles 162 for jetting air injected from the air injection pipe 161 toward the inside of the plaster mold (G) .
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