CN108621673B - Manufacturing method of ultrathin gold bar with microgrammes - Google Patents
Manufacturing method of ultrathin gold bar with microgrammes Download PDFInfo
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- CN108621673B CN108621673B CN201810509187.6A CN201810509187A CN108621673B CN 108621673 B CN108621673 B CN 108621673B CN 201810509187 A CN201810509187 A CN 201810509187A CN 108621673 B CN108621673 B CN 108621673B
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- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C5/00—Processes for producing special ornamental bodies
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Abstract
The invention provides a method for manufacturing an ultrathin gold bar with a microgrammer weight, which comprises the following steps: step 100, manufacturing noble metals into 0.003-0.004 mm foils; step 200, pressing the foils into two box bodies with side edges at the periphery respectively by using two extrusion dies which are in mutual extrusion fit; step 300, buckling the two box bodies to form a rectangular body; and 400, placing the buckled cuboid on an oil pressure die for oil pressure to obtain a final product. The invention adopts the two rectangular pits and the rectangular blocks which are matched with each other to position and press the foils to be pressed, so that the shapes of the box bodies which are finally matched with each other are completely consistent, and the fineness of the final product can be improved. The protective layer can prevent the foil from being damaged during extrusion, and the integrity of the product is ensured. The side edges of the box bodies which are in close contact with each other can be completely blended together through the oil pressure die, so that the integral structure of the whole product is ensured, and the ornamental value of the product is greatly improved.
Description
Technical Field
The invention relates to the field of manufacturing of precious ornaments, in particular to a method for manufacturing an ultrathin gold bar with a micro gram weight and an integrated structure accurately.
Background
At present, in the gold bar style products made of conventional ultrathin microgram heavy noble metal on the market, an upper gold sheet and a lower gold sheet are fixed together with a middle base body in an oil pressure mode, the two gold sheets are not combined together, but are independently combined and installed together, a gap is formed in the position where the two gold sheets contact, attractiveness is affected, and the gold sheets can be separated from the base body.
At present, a fixing method for bonding two gold sheet connecting edges in a bonding mode is adopted, but a gold bar fixed by the method cannot adapt to environmental changes well.
Disclosure of Invention
The invention aims to provide a method for accurately manufacturing an ultrathin microgrammer gold bar with an integrated structure
Particularly, the invention provides a manufacturing method of an ultrathin gold bar with a microgrammer weight, which comprises the following steps:
and 400, placing the buckled cuboid on an oil pressure die for oil pressure to obtain a final product.
In one embodiment of the present invention, the step 100 of forming the foil is as follows:
step 110, heating and melting the selected noble metal to a corresponding mold frame to form a substrate;
step 111, roughly rolling the substrate to the thickness of 1 mm;
step 112, rolling the roughly rolled substrate to be less than 0.1 mm;
113, finely rolling the rolled substrate to the thickness of 0.003-0.004 mm meeting the final requirement;
and step 114, cutting the final substrate to obtain a preset foil.
In one embodiment of the present invention, the rectangular pits and the rectangular blocks have the same height, and a protective layer for preventing damage to the foil when the foil is pressed is fixed on the surface of the rectangular blocks, and the thickness of the protective layer is 1/10-1/15 of the height of the rectangular blocks.
In one embodiment of the invention, after the two box bodies are fastened, the side edges of the two box bodies are overlapped, the overlapped height is one third of the height of a final product, and a filler with a preset thickness consistent with the inner shape is filled in a rectangular body formed after fastening.
In one embodiment of the present invention, through holes corresponding to the shape of the rectangular body are formed in the positions of the oil pressure die corresponding to the upper and lower surfaces of the rectangular body, die cores for pressing the upper and lower surfaces of the rectangular body in opposite directions are formed in the through holes, the two die cores move in opposite directions and apply a predetermined pressure to the front and back surfaces of the rectangular body after being fastened, and the side edges of the rectangular body are pressed together under the pressure to form a final product.
In one embodiment of the invention, an engraving for forming a corresponding pattern on the rectangular body is arranged on one surface of the die core opposite to the rectangular body, and the pressure applied to the rectangular body by the die core is 40-50 tons.
In one embodiment of the invention, the foil is provided with a margin which is larger than the area of the rear side of the box body, and the width of the margin is 10-15 times the height of the side edge of the box body.
In one embodiment of the invention, positioning points are arranged at positions of the extrusion die corresponding to the reserved edge of the foil, the positioning points are distributed on two opposite sides of the rectangular pit and the rectangular block, the surface of the rectangular block is provided with a fuzzy relief pattern, the surface of the rectangular pit is provided with a fine relief image, after the foil is extruded by the positioning points and the rectangular pit, the fine relief pattern is extruded on the formed box body, and the positioning points are extruded on the reserved edge.
In one embodiment of the present invention, through holes corresponding to the rectangular shape are formed in the positions of the hydraulic mold corresponding to the upper and lower surfaces of the rectangular body, and after the two box bodies are fastened, the positioning points of the two box bodies are positioned with each other and with the positioning point on the hydraulic mold, and the hydraulic mold extrudes the reserved edge of the box body to fuse the reserved edge, and then the reserved edge is trimmed to form the final product.
In one embodiment of the present invention, the hydraulic mold is provided with a heating structure for heating the reserve edge, the heating structure includes a heating belt fitted to a surface of the hydraulic mold that presses the case, and a power supply device for heating the heating belt, and the heating belt has a hollow quadrangular frame structure having a shape corresponding to a shape of the reserve edge of the case.
The invention adopts the two rectangular pits and the rectangular blocks which are matched with each other to position and press the foils to be pressed, so that the shapes of the box bodies which are finally matched with each other are completely consistent, and the fineness of the final product can be improved. The protective layer can prevent the foil from being damaged during extrusion, and the integrity of the product is ensured. The side edges of the box bodies which are in close contact with each other can be completely blended together through the oil pressure die, so that the integral structure of the whole product is ensured, and the ornamental value of the product is greatly improved.
Drawings
FIG. 1 is a schematic flow chart of a method of fabrication according to an embodiment of the present invention;
FIG. 2 is a schematic view of an extrusion die configuration according to an embodiment of the present invention;
FIG. 3 is a schematic view of a rectangular body snap-fit according to an embodiment of the present invention;
FIG. 4 is a schematic view of an oil hydraulic mold according to an embodiment of the present invention;
FIG. 5 is a schematic view of another extrusion die configuration according to an embodiment of the present invention;
fig. 6 is a schematic view of another oil pressure die structure according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1 to 3, the method for manufacturing an ultra-thin microgrammed gold bar according to an embodiment of the present invention generally includes the following steps:
the noble metal in the present embodiment may be gold, silver, platinum, palladium gold, or the like.
The foil may be formed by the following method:
step 110, heating and melting the selected noble metal to a corresponding mold frame to form a substrate;
the size of the die frame is determined according to the size of the gold bar to be made, and the amount of the cut edge needs to be reserved.
Step 111, roughly rolling the substrate to the thickness of 1 mm;
step 112, rolling the roughly rolled substrate to be less than 0.1 mm;
113, finely rolling the rolled substrate to the thickness of 0.003-0.004 mm meeting the final requirement;
the three rolling steps are to gradually process the substrate through three processes, and finally obtain the foil meeting the preset thickness requirement.
And step 114, cutting the final substrate to obtain a preset foil.
The cutting in the step is to directly cut out the area required by the box body through the hardware cutting die, and a certain error amount can also be reserved according to the error in the process. And the corresponding reserved edge can be prepared according to different requirements of the manufacturing process. In addition, if the ornament is made into other shapes than the gold bar, the ornament can be cut according to the shape of the product.
the foil 30 is directly placed between the rectangular pit 14 and the rectangular block 13 of the extrusion die 10 and is extruded by the two opposite directions, so that a box structure can be directly formed. Since the foil 30 is an ultra-thin product, the gap between the rectangular pit 14 and the rectangular block 13 after contact is 0.
In addition, the rectangular pits 14 and the rectangular blocks 13 have the same height, and a protective layer (not shown) for preventing damage caused by pressing the foil 30 is fixed on the surface of the rectangular blocks 13, and the thickness of the protective layer can be set according to 1/10-1/15 of the height of the rectangular blocks 13.
The protective layer material adopted in the embodiment is masking tape, the protective layer formed by the masking tape can avoid the tearing of the foil 30 caused by the direct extrusion of the steel extrusion die 10, and an extension space can be provided for the stretching of the foil 30 between the rectangular pit 14 and the rectangular block 13 after the protective layer is adopted.
The cross section of the rectangular pit 14 and the rectangular block 13 adopts an isosceles trapezoid structure, the bottom surface of the isosceles trapezoid structure is larger than the top surface of the rectangular pit structure, and a slope is kept, wherein the slope can be generally between 3 and 5 degrees. In addition, a thickness of the protective layer needs to be left between the rectangular pit 14 and the hypotenuse contact face of the rectangular block 13.
and step 400, placing the buckled cuboid on an oil pressure die 20 for oil pressure to obtain a final product.
In the step, the steel hardness of the oil pressure die 20 is 58-60 degrees, the pressure for extruding the rectangular body 34 is 40-50 tons, the problems of burrs, edge tension cracks, embossment tension cracks and the like caused by overlarge stress of the product can be caused by overlarge pressure, and the upper and lower gold sheets can be incompletely fused by undersize pressure.
In the embodiment, the two rectangular pits 14 and the rectangular blocks 13 which are matched with each other are adopted to position and press the foil sheets 30 to be pressed, so that the shapes of the box bodies 31 and 32 which are finally matched with each other are completely consistent, and the fineness of the final product is improved. The protective layer can prevent damage to the foil 30 during extrusion and ensure the integrity of the product. The side edges of the box bodies which are in close contact with each other can be completely blended together through the oil pressure die, so that the integral structure of the whole product is ensured, and the ornamental value of the product is greatly improved.
In the present invention, the manufacturing process is subdivided into two types according to the structure of the foil during manufacturing, and the corresponding extrusion process is different according to the structure, which will be described below.
In the first embodiment, after the two box bodies 31 and 32 are fastened, the two sides are overlapped with each other, and the height of the overlapped area is one third of the height of the final product, and a rectangular body 34 formed by the two box bodies 31 and 32 is filled with a filler 33 with a predetermined thickness consistent with the internal shape. That is, the side edge of each box 31, 32 is reserved with a corresponding width during the manufacturing process, so that after the two box 31, 32 are fastened to meet the basic thickness, the side edges of the two boxes are partially overlapped.
The filler 33 may be made of red vulcanized paper, but may be made of aluminum, alloy, or silica gel. The thickness of the filler 33 is selected according to the predetermined thickness of the final product.
As shown in fig. 4, correspondingly, the hydraulic mold 20 is provided with a through hole 23 corresponding to the shape of the rectangular body 34 of the case body, i.e. a rectangular through hole, at the position corresponding to the upper and lower surfaces of the rectangular body 34, die cores 21, 22 for pressing the upper and lower surfaces of the rectangular body 34 towards each other are arranged in the through hole 23, the die cores 21, 22 provide pressing power, the two die cores 21, 22 move towards each other and apply a predetermined pressure to the front and back surfaces of the rectangular body 34 after being fastened, and the side edges of the rectangular body 34 are pressed and fused together under the pressure to form a final product.
Adopt one-third's coincidence to prescribe a limit to, easily make the preparation of gold bar reach the volume production to test under being fit for various environment, because, it is positive and negative to reserve coincidence position and oil pressure, is equivalent to 1: 2, the applied oil pressure needs to be increased by times relative to the overlapping height, and the relief on the surface of the final product has a tension crack phenomenon due to overhigh pressure; if the overlapping height is small, although the operation is easy, the finished product is easy to generate the phenomenon of local cracking after being repeatedly operated in a plurality of working procedures, moved and tested in the environment with the higher temperature of 40-50 ℃ and the low temperature of minus 10-minus 40 ℃. Therefore, the present embodiment limits the overlap height to about one-third of the product height, and a balance can be achieved between pressure and testing.
During oil pressure, the die cores 21 and 22 directly extrude the upper surface and the lower surface of the rectangular body 34, and pressure borne by the two front surfaces of the rectangular body 34 is transmitted to the peripheral side edges, so that the overlapped parts are mutually fused under the combined action of the extrusion force and the side edges of the oil pressure die 20 to form a complete rectangular structure.
Since the two cases 31 and 32 are engaged with each other, the area of the case located outside can be reserved by a predetermined amount corresponding to the engaging area of the inside. If box 31 is fastened to box 32, the accommodation area of box 31 at least needs to be able to completely accommodate box 32.
Furthermore, because the front and back sides of the rectangular body 34 are directly extruded, the engraving for forming the corresponding pattern on the rectangular body 34 can be arranged on one side of the die cores 21 and 22 opposite to the rectangular body 34, so that the die cores 21 and 22 directly form the corresponding pattern on the front and back sides of the rectangular body 34 while extruding the rectangular body 34. The specific pattern can be a relief, an image, a decorative pattern and the like.
The pressure range of the die cores 21 and 22 is 40-50 tons, the product is stressed too much due to too much pressure, so that the problems of flash, edge tension crack, relief tension crack and the like occur, and the upper and lower gold sheets are not fused completely due to too little pressure.
The following gives a specific dimension of an actual gold bar to illustrate the foregoing limitations:
the thickness of the foil is 0.003-0.005 mm;
the length, width and height of the final gold bar are respectively as follows: 50 x 26 x 2 mm;
the heights of the side edges of the two box bodies are respectively 1.3-1.5 mm, wherein 0.3-0.5 mm is a superposition part;
the thickness of the filler red vulcanized paper positioned in the box body is 2 mm;
the upper bottom surface of the rectangular block is 0.2mm longer than the lower bottom surface, each side is 0.1mm longer,
when one box body is buckled on the other box body, the front area of the box body positioned outside is 0.05-0.1 mm larger than that of the other box body;
the width of each side of the cavity of the oil pressure die for accommodating the rectangular body 34 is 0.03-0.05 mm larger than that of each side of the die core channel, so that an overflow space is reserved when the box body is extruded and stressed.
Second embodiment, as shown in fig. 5 and 6, the foil 30 is cut to leave a margin 35 which is larger than the area behind the box portions 31, 32, and the width of the margin 35 may be 10-15 times the height of the side edges of the box portions 31, 32.
Aiming at the structure, positioning points 16 are arranged at the positions of the extrusion die 10 corresponding to the reserved edges 35 of the foils 30, the positioning points 16 are distributed on two opposite sides of the rectangular pit 14 and the rectangular block 13, the surface of the rectangular block 13 is provided with a fuzzy relief pattern, the surface of the rectangular pit 14 is provided with a fine relief pattern, after the foils 30 are extruded by the positioning points and the rectangular block 13, the fine patterns can be extruded on the formed box bodies 31 and 32, and the positioning points 36 are extruded on the reserved edges 35. To facilitate later cutting, an extrusion groove 15 for extruding the reserved edge 35 may be provided on the extrusion die 10.
Because the front and back sides of the box bodies 31 and 32 do not need to be extruded to fuse the two box bodies in the later stage of the scheme, corresponding patterns can be directly manufactured on the surfaces of the box bodies 31 and 32 in the process of manufacturing the box bodies. The pattern may embody a preset product effect: bright sand surface-sand can be divided into different sand surfaces such as coarse sand, medium sand, fine sand and the like, and the colorful effect-colorful light transformation, anti-counterfeiting, micro characters, latent images and the like can be seen through the transformation angle, and various noble metal effects such as texture and the like are selected according to preset corresponding effects. The box bodies after the two buckles are filled with the red vulcanized paper, the red vulcanized paper can play a supporting role so as to avoid collapse and deformation of the surfaces of the products after storage and storage for a long time, and in addition, various materials such as EVA, silica gel, PU, metal, jade and the like can be adopted.
The positioning points 16 may be two convex-concave corresponding points respectively provided on the opposite surfaces of the upper extrusion die 11 and the lower extrusion die 12 of the extrusion die 10, so that the reserved edge 35 may define an operation position through the positioning points 36 at the time of a later operation, thereby improving the precision in manufacturing.
Under this structure, two box bodies 31, 32 that extrude are when the lock, and the side contacts each other through reserving limit 35, do not need the box body side to reserve the width of mutual coincidence.
When the oil pressure is applied, the oil pressure mold 20 is divided into an upper oil pressure mold 24 and a lower oil pressure mold 25, through holes 23 corresponding to the shapes of the box bodies 31, 32 are also formed at the positions of the upper oil pressure mold 24 and the lower oil pressure mold 25 relative to the upper and lower surfaces of the box bodies 31, 32, but the through holes 23 are not provided with the extruded die cores 21 and 22, after the two box bodies 31 and 32 are buckled, the positioning points 36 of the two are mutually positioned and simultaneously positioned with the positioning points 26 on the upper oil pressure die 24 and the lower oil pressure die 25, so that the box bodies 31 and 32 are limited at the fixed positions, the front and back surfaces of the box bodies 31 and 32 are positioned at the through holes 23 and are not stressed, then, the reserved edges 35 of the box bodies 31 and 32 are directly extruded by the upper oil pressure die 24 and the lower oil pressure die 25 to be blended, and then the blended reserved edges 35 are subjected to trimming (cutting) to form a final product, wherein the periphery of the gold bar under the structure is provided with a flat edge with a certain width.
In this embodiment, the size of the reserved edge 35 is large, which results in more production waste, and the size of the reserved edge 35 is small, so that the defective rate of the box bodies 31 and 32 after partial placement is large, and therefore, the width of the reserved edge 35 is generally 1-3 times of the thickness of the final product.
Under this structure, the overflow space when squeezing reserve limit 35 also need be left for to the cavity volume of placing box body 31, 32 in the oil pressure mould 20, scrapes colored product when avoiding clapping the limit, but this overflow space can not influence the extrusion effect that is close one end to reserve limit 35 and box body 31, 32. The edge beating mold has a hollow-out cutting effect according to product modeling and a hollow-out cutting effect according to a processing technology, and can also be used for manufacturing a concave table, wherein the concave table needs to be larger than the height of a product. The edge-beating mold is used for stamping through an oil pressure mold, the pressure is 20-30 tons, and the reserved edges 35 can be tightly pressed and fused together.
The following gives a specific dimension of an actual gold bar to illustrate the foregoing limitations:
the thickness of the foil is 0.003-0.005 mm;
the area of the foil sheet relative to the area required by the box body is at least 3-5 mm more reserved edges on each side;
the length, width and height of the final gold bar are respectively as follows: 50 x 26 x 2 mm;
the height of the side edges of the two box bodies is 1 mm;
the width that the oil pressure mould holds the cavity of box body is 0.01 ~ 0.02mm than the width of box body greatly.
Further, a heating structure (not shown in the figure) for heating the reserved edge 35 may be provided on the hydraulic mold 20, the heating structure includes a heating band embedded on one side of the hydraulic mold 20 pressing the box bodies 31 and 32, and a power supply device for heating the heating band, and the heating band is a hollow four-frame structure having a shape corresponding to the shape of the reserved edge 35 of the box bodies 31 and 32.
When the reserved edge 35 is extruded, the heating belt can be powered at the same time, so that the reserved edge 35 is heated while bearing pressure. Corresponding to the heating belt itself being both the pressing and heating elements. The heating and the edge beating action can be carried out simultaneously, the edge beating is realized, the heating temperature is 200-400 ℃, the heating time is 5-10 seconds, the heating can enable the upper and lower reserved edges 35 to be fused more thoroughly, and the product quality is improved. This scheme adopts the structure of four sides heating, can avoid haring product surface treatment's effect.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (9)
1. The manufacturing method of the ultrathin gold bar with the microgrammes is characterized by comprising the following steps of:
step 100, manufacturing noble metals into 0.003-0.004 mm foils;
step 200, pressing the foils into two box bodies with side edges at the periphery respectively by using two extrusion dies which are in mutual extrusion fit; the extrusion die comprises an upper extrusion die and a lower extrusion die which are provided with opposite planes, wherein the middle part of the lower extrusion die is provided with an inwards concave rectangular pit, the opposite surface of the upper extrusion die is provided with an outwards convex rectangular block, the rectangular pit and the rectangular block are isosceles trapezoids, and no gap exists between the two blocks after the rectangular pit and the rectangular block are jointed;
step 300, buckling the two box bodies to form a rectangular body;
step 400, placing the buckled cuboid on an oil pressure die for oil pressure;
the oil pressure die is characterized in that through holes corresponding to the rectangular body are formed in the positions, corresponding to the upper surface and the lower surface of the rectangular body, of the oil pressure die, die cores which extrude the upper surface and the lower surface of the rectangular body in opposite directions are arranged in the through holes, the two die cores move in opposite directions and apply preset pressure to the front side and the back side of the rectangular body after buckling, and the side edges of the rectangular body are pressed together under the pressure to form a final product.
2. The method of manufacturing according to claim 1,
the foil forming step in step 100 is as follows:
step 110, heating and melting the selected noble metal to a corresponding mold frame to form a substrate;
step 111, roughly rolling the substrate to the thickness of 1 mm;
step 112, rolling the roughly rolled substrate to be less than 0.1 mm;
113, finely rolling the rolled substrate to the thickness of 0.003-0.004 mm meeting the final requirement;
and step 114, cutting the final substrate to obtain a preset foil.
3. The method of manufacturing according to claim 2,
the rectangle hole with the height of rectangle piece is unanimous, and the fixed surface of rectangle piece has the protection layer of avoiding to cause the damage when the foil extrudees, the thickness of protection layer is 1/10 ~ 1/15 of rectangle piece height.
4. The method of manufacturing according to claim 3,
after the two box bodies are buckled, the side edges of the two box bodies are mutually overlapped, the overlapped height is one third of the height of a final product, and fillers with preset thickness and the same shape as the inner shape are filled in a rectangular body formed after buckling.
5. The method of manufacturing according to claim 4,
and one surface of the die core, which is opposite to the rectangular body, is provided with carving for forming a corresponding pattern on the rectangular body, and the pressure applied to the rectangular body by the die core is 40-50 tons.
6. The method of manufacturing according to claim 3,
and a reserved edge which is larger than the area of the formed box body is reserved on the foil, and the width of the reserved edge is 10-15 times of the height of the side edge of the box body.
7. The method of manufacturing according to claim 6,
the method comprises the steps that positioning points are arranged at positions of an extrusion die corresponding to reserved edges of foil sheets, the positioning points are distributed on two opposite side edges of a rectangular pit and a rectangular block, fuzzy relief patterns are arranged on the surface of the rectangular block, fine relief images are arranged on the surface of the rectangular pit, the positioning points and the rectangular block are extruded on a formed box body after the foil sheets are extruded, and the positioning points are extruded on the reserved edges.
8. The method of manufacturing according to claim 7,
the oil pressure mould is relative the position department of the upper and lower surface of cuboid be provided with the through-hole that the cuboid shape corresponds, two behind the box body lock, the setpoint mutual positioning of both and simultaneously with the setpoint location on the oil pressure mould, the oil pressure mould is right the reserve limit of box body extrudees and makes it blend, forms final product after carrying out the overlap to the reserve limit again.
9. The method of manufacturing according to claim 8,
be provided with on the oil pressure mould right the heating structure that the reservation limit carries out the heating, heating structure is including inlaying oil pressure mould extrudees the heating band in the box body one side heats the power supply unit of heating band, the heating band for the shape with the hollow four-sided frame structure that the reservation limit shape of box body corresponds.
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| CN2850967Y (en) * | 2005-09-12 | 2006-12-27 | 洪东阳 | Hollow metal bibelot |
| CN203344601U (en) * | 2013-06-18 | 2013-12-18 | 刘立 | Embossed gold card |
| CN205033840U (en) * | 2015-07-01 | 2016-02-17 | 深圳市国富黄金股份有限公司 | Ultra -thin three -dimensional noble metal handicraft of utensil third dimension |
| CN106274239A (en) * | 2015-05-20 | 2017-01-04 | 深圳市金宝盈文化股份有限公司 | The gold silver painting canvas processing technology of ultra-thin ultra-wide |
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Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100275649A1 (en) * | 2009-04-30 | 2010-11-04 | Tamara Ann Eggleston | Pendant for carrying remembrances such as cremation remains |
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2018
- 2018-05-24 CN CN201810509187.6A patent/CN108621673B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2850967Y (en) * | 2005-09-12 | 2006-12-27 | 洪东阳 | Hollow metal bibelot |
| CN203344601U (en) * | 2013-06-18 | 2013-12-18 | 刘立 | Embossed gold card |
| CN106274239A (en) * | 2015-05-20 | 2017-01-04 | 深圳市金宝盈文化股份有限公司 | The gold silver painting canvas processing technology of ultra-thin ultra-wide |
| CN205033840U (en) * | 2015-07-01 | 2016-02-17 | 深圳市国富黄金股份有限公司 | Ultra -thin three -dimensional noble metal handicraft of utensil third dimension |
| CN107310318A (en) * | 2016-04-27 | 2017-11-03 | 深圳市金宝盈文化股份有限公司 | A kind of noble metal paper tinsel, diel and its manufacture craft |
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