Metal product and manufacturing method thereof, and mold assembly

Abstract

The present invention discloses a metal product and a manufacturing method and a mold assembly, wherein the metal product comprises: a metal body, wherein the metal body is evenly divided into a plurality of sub-metal blocks of preset shapes, wherein the plurality of sub-metal blocks are in an array shape; adjacent sub-metal blocks are connected, and a first V-shaped groove is formed at the connection between adjacent sub-metal blocks; wherein the first V-shaped groove is provided with a sharp angle and a calibrated shape. The present invention obtains the metal product through rapid molding by primary molding and fine molding by secondary molding; the metal product obtained by the precision manufacturing method of the present invention can easily accurately divide adjacent sub-metal blocks along the first V-shaped groove, and the weight error of the divided multiple sub-metal blocks is extremely small, which overcomes the shortcomings of high production cost of traditional small and micro-weight precious metal investment products and inconvenient after-sales use of large-weight products, and greatly improves the production efficiency of small precious metal products through technological innovation, and accurately controls the error loss cost.

Description

Technical Field

[0001] The present invention relates to the field of metal products, and in particular to a metal product and a manufacturing method thereof, and a mold assembly. Background Art

[0002] With the deepening of the Internet era and the influence of social trends such as the replacement of consumers, mass investment / consumption is increasingly inclined to small-scale, fragmented and inclusive. As we all know, precious metals have strong investment and value preservation value, while the traditional precious metal investment products on the market are mostly in the form of fixed bars, coins, seals, etc., and the products with relatively high investment and value preservation value are mostly heavy products. However, the purchase threshold of such heavy investment products is high, which cannot meet the needs of a wider range of popular small and micro investments, and is very inconvenient to use after sales. It can only be bought and used as a whole, and cannot meet practical and scattered needs such as repurchase or exchange of jewelry in batches. Precious metal products with smaller weights are affected by traditional technical methods, are expensive, and lose the investment and value preservation value of precious metals themselves, thus seriously restricting the market development of precious metal investment products.

[0003] Since precious metals themselves are expensive and are mainly priced by gram in the market, material loss needs to be strictly controlled during the production process. Current production technology mainly achieves this through manual weighting. The more accurate the weight, the less material loss, but the higher the time and labor costs. For example, the production process and labor costs of producing a single 1 kg bar and a 1 gram bar are basically similar. Therefore, the greater the weight, the lower the production cost and loss cost per gram, and the smaller the weight, the higher the production cost and loss cost per gram. In terms of the investment and preservation value of precious metal products, the smaller the added price, the higher the investment and preservation value. Therefore, the market urgently needs a small and micro investment product of precious metals with light weight, low cost and easy use to meet the investment and purchasing needs of the public. Summary of the invention

[0004] In view of the above technical problems, the embodiments of the present invention provide a metal product and a manufacturing method thereof, and a mold assembly. The metal product described above utilizes the stress concentration principle in material mechanics, and is provided with an extremely precise V-shaped sharp angle groove as a stress concentration position, so that the metal block breaks and is divided into small pieces when subjected to a small external force. The more precise the top angle of the V-shaped sharp angle groove, the more accurate the stress concentration position, the higher the segmentation accuracy, the less material loss, and the lower the cost. The manufacturing method and mold assembly thereof take into account both high efficiency and high precision; the primary rapid molding mold is provided with a 60-150 degree rounded cutting edge, which is most conducive to protecting the mold cutting edge from breaking, damage, deformation and affecting the processing accuracy and efficiency during high-gravity and high-efficiency extrusion operations, thereby improving the service life and precision of the mold, and realizing high-efficiency and low-cost manufacturing of standard primary semi-finished products; the secondary fine molding mold is provided with a top column, precise sharp-angle cutting edges and fine textures or graphic marks, which is most conducive to improving the service life and precision of the precision mold, and realizing high-efficiency and low-cost manufacturing of the metal product. Compared with traditional production technology and products, its main purpose is to solve the problems of high production costs of traditional small-weight metal investment products and inconvenient after-sales use of large-weight products. Through technological innovation, the production efficiency of small precious metal products has been greatly improved, and the error loss cost has been accurately controlled.

[0005] A first aspect of an embodiment of the present invention provides a metal product, the metal product comprising:

[0006] A metal body, wherein the metal body is evenly divided into a plurality of sub-metal blocks of a preset shape, and the plurality of sub-metal blocks are in an array shape;

[0007] Adjacent sub-metal blocks are connected, and a first V-shaped groove is formed at the connection between the adjacent sub-metal blocks;

[0008] Wherein, the first V-shaped groove is provided with a sharp angle and a calibrated shape.

[0009] Optionally, the top angle of the first V-shaped groove is a sharp angle, and the precision of the sharp angle of the first V-shaped groove is greater than or equal to 0.005 mm and less than or equal to 0.02 mm; and / or,

[0010] The apex angle bisector of the first V-shaped groove is perpendicular to the bottom surface of the sub-metal block, and the apex angle of the first V-shaped groove is greater than 60 degrees and less than or equal to 150 degrees; and / or,

[0011] The opening width of the first V-shaped groove is greater than or equal to the depth of the first V-shaped groove; and / or,

[0012] The vertical distance from the vertex of the first V-shaped groove to the bottom surface of the sub-metal block is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. Optionally, the plurality of sub-metal blocks have the same shape.

[0013] Optionally, the sub-metal block is in a square, rectangle, rhombus or triangle shape.

[0014] Optionally, force is applied to the sub-metal blocks on both sides of the first V-shaped groove to separate adjacent sub-metal blocks along the first V-shaped groove, and the error between the weight of the divided sub-metal blocks and the calibrated weight is less than or equal to +0.01g and greater than or equal to -0.01g.

[0015] Optionally, a second V-shaped groove is formed on the other side of the connection between adjacent sub-metal blocks, the vertex angle of the second V-shaped groove is a sharp angle, and the precision of the sharp angle of the second V-shaped groove is greater than or equal to 0.005 mm and less than or equal to 0.02 mm;

[0016] The top angle of the first V-shaped groove is directly opposite to the top angle of the second V-shaped groove.

[0017] Optionally, the depth of the first V-shaped groove is greater than the depth of the second V-shaped groove; and / or

[0018] The vertex angle of the second V-shaped groove is greater than 60 degrees and less than or equal to 150 degrees; and / or,

[0019] The distance between the apex of the first V-shaped groove and the apex of the second V-shaped groove is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

[0020] Optionally, at least one side of each of the sub-metal blocks is provided with a texture or graphic mark.

[0021] Optionally, textures or graphic marks are respectively provided on both sides of each of the sub-metal blocks.

[0022] Optionally, the metal product is made of precious metal.

[0023] A second aspect of the embodiments of the present invention provides a method for manufacturing the metal product according to the first aspect, the method comprising:

[0024] Putting a standard metal sheet with a flat surface into the primary forming chamber of the primary rapid forming cutting die and extruding it to obtain a primary semi-finished product;

[0025] The primary semi-finished product is placed in a secondary forming chamber of a secondary fine forming cutting die and extruded to obtain the metal product;

[0026] Wherein, the initial rapid prototyping cutting die comprises a die frame, a first pressing die and a second pressing die arranged on the die frame, at least one of the first pressing die and the second pressing die is slidably arranged on the die frame, and the first pressing die cooperates with the second pressing die to form the initial forming bin, a plurality of first cutting edges arranged at intervals are arranged on one side of the first pressing die facing the second pressing die, the first cutting edges are cone-shaped and located in the initial forming bin, the top of the first cutting edges is rounded, and the height of the first cutting edges is less than the thickness of the metal sheet, the width of the first cutting edge on the side close to the first pressing die is greater than the height of the first cutting edge, and the first cutting edge can extrude the metal sheet so that a primary V-shaped groove is formed on one side of the metal sheet;

[0027] The secondary fine molding cutting die comprises a third pressing die and a fourth pressing die which are matched with each other. The third pressing die cooperates with the fourth pressing die to form the secondary molding chamber. The fourth pressing die is provided with a plurality of second cutting edges arranged at intervals on a side facing the third pressing die. The number of the second cutting edges is equal to that of the first cutting edges. The second cutting edges are conical and located in the secondary molding chamber. The top of the second cutting edge is a sharp angle. The sharp angle accuracy of the second cutting edge is greater than or equal to 0.005 mm and less than or equal to 0.02 mm. The taper angle of the second cutting edge is equal to that of the first cutting edge. The width of the second cutting edge on the side close to the fourth pressing die is equal to the width of the first cutting edge on the side close to the first pressing die. The width of the second cutting edge on the side close to the fourth pressing die is greater than the height of the second cutting edge. The plurality of second cutting edges correspond to the plurality of primary V-grooves on the primary semi-finished product, so that the plurality of primary V-grooves on the primary semi-finished product form the first V-grooves of the metal product.

[0028] Optionally, a plurality of the first cutting edges are evenly spaced and arranged on a side of the first pressing die facing the second pressing die, and a plurality of the second cutting edges are evenly spaced and arranged on a side of the fourth pressing die facing the third pressing die.

[0029] Optionally, the cone angle of the first cutting edge is greater than 60 degrees and less than or equal to 150 degrees.

[0030] Optionally, the apex of the second cutting edge is lower than the side surface of the fourth pressing die, and the distance between the apex of the second cutting edge and the side surface of the fourth pressing die is greater than or equal to 0.1 mm and less than or equal to 0.3 mm, the side surface of the fourth pressing die is abutted against the side surface of the third pressing die, and the secondary molding chamber is formed between the side of the fourth pressing die and the side of the third pressing die.

[0031] Optionally, a plurality of third cutting edges arranged at intervals are provided on the side of the third pressing die facing the fourth pressing die, the number of the third cutting edges is equal to the number of the second cutting edges, the third cutting edges are conical and are located in the secondary molding bin, the top angle of the third cutting edge is a sharp angle, the precision of the sharp angle of the third cutting edge is greater than or equal to 0.005 mm and less than or equal to 0.02 mm, the top angle of the third cutting edge is opposite to the top angle of the second cutting edge, and the cone angle of the third cutting edge is equal to the cone angle of the second cutting edge, and the third cutting edge corresponds to the side of the primary semi-finished product that is away from the primary V-groove, so that the second V-groove of the metal product is formed on the primary semi-finished product.

[0032] Optionally, the height of the third cutting edge is lower than the height of the second cutting edge; and / or,

[0033] The plurality of third cutting edges are evenly spaced and arranged on a side of the third pressing die facing the fourth pressing die; and / or,

[0034] The cone angle of the third cutting edge is greater than 60 degrees and less than or equal to 150 degrees.

[0035] Optionally, a plurality of texture or graphic imprint forming parts are provided on the side of the third pressing die facing the fourth pressing die and / or on the side of the fourth pressing die facing the third pressing die, and one of the texture or graphic imprint forming parts is provided between adjacent second cutting edges and / or between adjacent third cutting edges.

[0036] Optionally, a side of the third pressing die facing the fourth pressing die and a side of the fourth pressing die facing the third pressing die are respectively provided with a plurality of texture or graphic imprint forming parts;

[0037] The texture or graphic mark forming part can extrude the primary semi-finished product so that the texture or graphic mark of the metal product is formed on both side surfaces of the primary semi-finished product.

[0038] Optionally, after placing the primary semi-finished product into a secondary molding bin of a secondary fine molding and cutting module and extruding it to obtain the metal product, the process further includes:

[0039] The metal product is divided along the first V-shaped groove to obtain a plurality of mutually separated sub-metal blocks.

[0040] Optionally, the metal sheet is made of precious metal.

[0041] A third aspect of the embodiments of the present invention provides a mold assembly for manufacturing the metal product described in the first aspect, wherein the mold assembly includes a primary rapid prototyping cutting mold and a secondary fine prototyping cutting module;

[0042] Wherein, the initial rapid prototyping cutting die comprises a die frame, a first pressing die and a second pressing die arranged on the die frame, at least one of the first pressing die and the second pressing die is slidably arranged on the die frame, and the first pressing die cooperates with the second pressing die to form the initial forming bin, a plurality of first cutting edges arranged at intervals are arranged on one side of the first pressing die facing the second pressing die, the first cutting edges are cone-shaped and located in the initial forming bin, the top of the first cutting edges is rounded, and the height of the first cutting edges is less than the thickness of the metal sheet, and the width of the first cutting edges on the side close to the first pressing die is greater than the height of the first cutting edges;

[0043] The secondary fine molding cutting die comprises a third pressing die and a fourth pressing die which are matched with each other. The third pressing die cooperates with the fourth pressing die to form the secondary molding chamber. The fourth pressing die is provided with a plurality of second cutting edges arranged at intervals on a side facing the third pressing die. The number of the second cutting edges is equal to that of the first cutting edges. The second cutting edges are conical and located in the secondary molding chamber. The top of the second cutting edge is a sharp angle. The precision of the sharp angle of the second cutting edge is greater than or equal to 0.005 mm and less than or equal to 0.02 mm. The taper angle of the second cutting edge is equal to that of the first cutting edge. The width of the second cutting edge on the side close to the fourth pressing die is equal to the width of the first cutting edge on the side close to the first pressing die. The width of the second cutting edge on the side close to the fourth pressing die is greater than the height of the second cutting edge.

[0044] When a metal sheet with a flat surface is placed in a primary forming chamber of a primary rapid forming cutting die and extruded, the first cutting edge can extrude the metal sheet so that a primary V-shaped groove is formed on one side of the metal sheet to obtain a primary semi-finished product;

[0045] When the primary semi-finished product is placed in the secondary molding bin of the secondary fine molding cutting module and extruded, the multiple second cutting edges correspond to the multiple primary V-grooves on the primary semi-finished product, so that the multiple primary V-grooves on the primary semi-finished product form the first V-groove of the metal product.

[0046] Optionally, a plurality of the first cutting edges are evenly spaced and arranged on a side of the first pressing die facing the second pressing die, and a plurality of the second cutting edges are evenly spaced and arranged on a side of the fourth pressing die facing the third pressing die.

[0047] Optionally, the cone angle of the first cutting edge is greater than 60 degrees and less than or equal to 150 degrees.

[0048] Optionally, the apex of the second cutting edge is lower than the side surface of the fourth pressing die, and the distance between the apex of the second cutting edge and the side surface of the fourth pressing die is greater than or equal to 0.1 mm and less than or equal to 0.3 mm, the side surface of the fourth pressing die is abutted against the side surface of the third pressing die, and the secondary molding chamber is formed between the side of the fourth pressing die and the side of the third pressing die.

[0049] Optionally, a plurality of third cutting edges arranged at intervals are provided on a side of the third pressing die facing the fourth pressing die, the number of the third cutting edges is equal to the number of the second cutting edges, the third cutting edges are cone-shaped and are located in the secondary molding chamber, the top angle of the third cutting edges is a sharp angle, the top angle of the third cutting edges is directly opposite to the top angle of the second cutting edges, and the cone angle of the third cutting edges is equal to the cone angle of the second cutting edges;

[0050] When the primary semi-finished product is placed in the secondary molding bin of the secondary fine molding cutting module and extruded, the third cutting edge correspondingly extrudes the side of the primary semi-finished product away from the primary V-groove, so that a second V-groove of the metal product is formed on the primary semi-finished product.

[0051] Optionally, the height of the third cutting edge is lower than the height of the second cutting edge; and / or,

[0052] The plurality of third cutting edges are evenly spaced and arranged on a side of the third pressing die facing the fourth pressing die; and / or,

[0053] The cone angle of the third cutting edge is greater than 60 degrees and less than or equal to 150 degrees.

[0054] Optionally, a plurality of texture or graphic imprint forming parts are provided on the side of the third pressing die facing the fourth pressing die and / or on the side of the fourth pressing die facing the third pressing die, and one of the texture or graphic imprint forming parts is provided between adjacent second cutting edges and / or between adjacent third cutting edges.

[0055] Optionally, a side of the third pressing die facing the fourth pressing die and a side of the fourth pressing die facing the third pressing die are respectively provided with a plurality of texture or graphic imprint forming parts;

[0056] The texture or graphic mark forming part can extrude the primary semi-finished product so that the texture or graphic mark of the metal product is formed on both side surfaces of the primary semi-finished product.

[0057] Optionally, the metal sheet is made of precious metal.

[0058] In the technical solution provided by the embodiment of the present invention, a first V-shaped groove is provided at the connection between adjacent sub-metal blocks, and the first V-shaped groove is provided with a sharp corner and a calibrated shape. In this way, the adjacent sub-metal blocks can be easily divided along the first V-shaped groove, and precise division is achieved. The divided sub-metal blocks have extremely precise weights, and the weight error is controlled within a relatively low range. The shortcomings of expensive production costs of traditional small-weight metal investment products and inconvenient after-sales use of large-weight products are overcome, the production efficiency of small and micro metal blocks is greatly improved, and the error loss cost is accurately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 A schematic structural diagram of a metal product according to an embodiment of the present invention;

[0060] Figure 2A A side view of a metal product according to an embodiment of the present invention;

[0061] Figure 2B A side view of a metal product according to another embodiment of the present invention; Figure 3 A schematic diagram of a method flow of a method for manufacturing a metal product according to an embodiment of the present invention;

[0062] Figure 4A A schematic diagram of processing a metal sheet by a primary rapid prototyping cutting die according to an embodiment of the present invention;

[0063] Figure 4B This is a schematic structural diagram of a primary semi-finished product according to an embodiment of the present invention;

[0064] Figure 5A It is a schematic diagram of processing a primary semi-finished product by a secondary fine forming and cutting die according to an embodiment of the present invention;

[0065] Figure 5B It is a schematic diagram of processing a primary semi-finished product through a secondary fine molding and cutting die according to another embodiment of the present invention.

[0066] Reference numerals:

[0067] 1: metal body; 11: sub-metal block; 12: first V-shaped groove; 13: second V-shaped groove; 14: texture or graphic mark;

[0068] 10: metal sheet; 20: primary semi-finished product; 21: primary V-groove; 30: secondary semi-finished product;

[0069] 100: initial rapid prototyping cutting die; 110: mold frame; 120: first pressing die; 130: second pressing die; 140: initial prototyping chamber; 150: first cutting edge;

[0070] 200: secondary fine molding cutting die; 210: third pressing die; 220: fourth pressing die; 230: secondary molding chamber; 240: second cutting edge; 250: third cutting edge; 260: texture or graphic imprint forming part; 270: side surface of the fourth pressing die. DETAILED DESCRIPTION

[0071] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0072] It should be noted that the following embodiments can be combined if there is no conflict.

[0073] Please combine Figure 1 and Figure 2A An embodiment of the present invention provides a metal product, which may include a metal body 1, which is evenly divided into a plurality of sub-metal blocks 11 of preset shapes, wherein the preset shape is a precise shape, and the plurality of sub-metal blocks 11 are in an array. Exemplarily, the plurality of sub-metal blocks 11 are arranged in a row or a column; exemplary, the plurality of sub-metal blocks 11 are arranged in multiple rows and columns, such as two rows and two columns, three rows and two columns, or other numbers of rows and columns.

[0074] Furthermore, adjacent sub-metal blocks 11 are connected, and a first V-shaped groove 12 is formed at the connection between adjacent sub-metal blocks 11 .

[0075] The first V-shaped groove 12 has precise sharp corners and a calibrated shape.

[0076] The metal product of the embodiment of the present invention realizes precise segmentation by setting a first V-groove 12 on one side of the connection between adjacent sub-metal blocks 11, and the first V-groove 12 has precise sharp angles and a calibrated shape (i.e., a preset shape). In this way, precise segmentation is achieved, and the segmented sub-metal blocks 11 have extremely precise weights, and the weight errors meet expectations. The shortcomings of traditional small-weight metal investment products, such as expensive production costs and inconvenient after-sales use of large-weight products, are overcome, and the production efficiency of the sub-metal blocks 11 is greatly improved, as well as the extremely precise control of the tolerance material loss cost.

[0077] By utilizing the stress concentration principle in material mechanics, an extremely precise first V-shaped groove 12 is provided between each sub-metal block 11 in the metal body 1 as a stress concentration position, so that the large metal body 1 breaks and is divided into small sub-metal blocks 11 when the stress reaches the maximum value under the action of external force. Since the top angle of the first V-shaped groove 12 is a precise sharp angle, the more precise the stress concentration position is, the higher the division accuracy is, the less material loss is, and the lower the cost is.

[0078] In this embodiment, since the plurality of sub-metal blocks 11 are formed on the same metal body 1 and the thickness of the metal body 1 is the same at all locations, the thicknesses of the plurality of sub-metal blocks 11 are completely the same.

[0079] Optionally, the top angle of the first V-shaped groove 12 is a precise sharp angle, and the precision of the sharp angle of the first V-shaped groove 12 is greater than or equal to 0.005 mm and less than or equal to 0.02 mm.

[0080] Optionally, the apex angle bisector of the first V-shaped groove 12 is perpendicular to the bottom surface of the sub-metal block 11, and the apex angle of the first V-shaped groove 12 is greater than 60 degrees and less than or equal to 150 degrees. Exemplarily, the apex angle of the first V-shaped groove 12 is 65 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees or other angles greater than 60 degrees and less than 150 degrees.

[0081] Optionally, the width of the opening of the first V-shaped groove 12 is greater than the depth of the first V-shaped groove 12. It should be noted that in the embodiment of the present invention, the opening of the first V-shaped groove 12 is the outermost opening of the first V-shaped groove 12, and the width of the opening of the first V-shaped groove 12 is also the maximum width of the first V-shaped groove 12.

[0082] Optionally, a vertical distance from the vertex of the first V-shaped groove 12 to the bottom surface of the sub-metal block 11 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

[0083] Optionally, adjacent sub-metal blocks 11 are symmetrical about the corresponding first V-groove 12 (i.e., the first V-groove 12 formed on one side of the connection between the adjacent sub-metal blocks 11), and the weight error of the multiple sub-metal blocks 11 is less than or equal to +0.01g and greater than or equal to -0.01g, thereby achieving precise weight division.

[0084] Optionally, the multiple sub-metal blocks 11 have the same shape, and the shape of the sub-metal block 11 can be square, such as a rectangle or a square, or can be other regular shapes, such as a parallelogram, a rhombus, or a triangle.

[0085] Exemplarily, in some embodiments, each sub-metal block 11 has equal weight and the same shape, so that the shapes and weights of the multiple sub-metal blocks 11 separated are exactly the same, and the separated sub-metal blocks 11 have extremely precise weights, and the weight error meets expectations.

[0086] Of course, the shapes of the plurality of sub-metal blocks 11 may be partially the same and partially different, and accordingly, the weights of the plurality of sub-metal blocks 11 may also be partially the same and partially different. Exemplarily, the plurality of sub-metal blocks 11 are arranged in ten rows and ten columns, and the shapes and weights of the sub-metal blocks 11 in each row are the same, and the shapes and weights of the metal blocks 11 in different rows are different; or, the shapes and weights of the sub-metal blocks 11 in each column are the same, and the shapes and weights of the metal blocks 11 in different columns are different.

[0087] In the embodiment of the present invention, by applying force to the sub-metal blocks on both sides of the first V-shaped groove 12, adjacent sub-metal blocks 11 can be accurately separated. A simple tool or manual force can be used to apply force to the sub-metal blocks on both sides of the first V-shaped groove 12 to separate multiple sub-metal blocks 11 with precise weight and size. The error between the weight of the divided sub-metal blocks 11 and the calibrated weight (whose size can be preset as needed) is less than or equal to +0.01g and greater than or equal to -0.01g.

[0088] For further information, see Figure 2B In some embodiments, a second V-shaped groove 13 is formed on the other side of the connection between adjacent sub-metal blocks 11, that is, a first V-shaped groove 12 and a second V-shaped groove 13 are respectively provided on both sides of the connection between adjacent sub-metal blocks 11. The top angle of the second V-shaped groove 13 is a precise sharp angle, and the precision of the sharp angle of the second V-shaped groove 13 is greater than or equal to 0.005 mm and less than or equal to 0.02 mm, and the top angle of the first V-shaped groove 12 is directly opposite to the top angle of the second V-shaped groove 13. By adding the second V-shaped groove 13, force can be applied along the first V-shaped groove 12 and the second V-shaped groove 13, so that the adjacent sub-metal blocks can be easily separated, and the force required to separate the adjacent sub-metal blocks can be smaller, so that the adjacent sub-metal blocks are easier to separate.

[0089] In this embodiment, the depth of the first V-shaped groove 12 is greater than the depth of the second V-shaped groove 13, and the second V-shaped groove 13 has a function of assisting segmentation.

[0090] In the embodiment of the present invention, the width of the opening of the second V-shaped groove 13 is greater than or equal to the depth of the second V-shaped groove 13 .

[0091] The apex angle bisector of the second V-shaped groove 13 is perpendicular to the bottom surface of the sub-metal block 11. Furthermore, in some embodiments, the apex angle of the second V-shaped groove 13 is greater than 60 degrees and less than or equal to 150 degrees. Exemplarily, the apex angle of the second V-shaped groove 13 is 65 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees or other angles greater than 60 degrees and less than 150 degrees.

[0092] After the metal product is divided along the sub-metal blocks 11 on both sides of the first V-shaped groove 12 and the second V-shaped groove 13, a plurality of phase-separated sub-metal blocks 11 can be obtained. The structures and weights of the plurality of metal blocks obtained by division are completely the same, thus achieving precise division.

[0093] Optionally, the distance between the vertex of the first V-shaped groove 12 and the vertex of the second V-shaped groove 13 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. Exemplarily, the distance between the vertex of the first V-shaped groove 12 and the vertex of the second V-shaped groove 13 is 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm or other numerical values ​​greater than 0.1 mm and less than 0.3 mm. With such a size design, multiple sub-metal blocks 11 with precise weight and size can be divided using simple tools or manual operations.

[0094] In the embodiment of the present invention, the first V-shaped groove 12 and the second V-shaped groove 13 are both symmetrical structures.

[0095] Further, please combine Figure 2A and Figure 2B In some embodiments, at least one side of each sub-metal block 11 is provided with a texture or graphic mark 14, which can indicate information of the sub-metal block 11 and also make the sub-metal block 11 more beautiful. The texture or graphic mark 14 can include a concave and / or convex structure to form a pattern such as an embossed pattern, which can indicate a logo, the weight of the sub-metal block 11, the color mark of the sub-metal block 11, and the like.

[0096] Exemplarily, each sub-metal block 11 is provided with a texture or graphic imprint 14 on both sides. Optionally, the texture or graphic imprint 14 on both sides of each sub-metal block 11 are symmetrical, that is, the content indicated by the texture or graphic imprint 14 on both sides of each sub-metal block 11 is the same, further improving the aesthetics of the sub-metal block 11; optionally, the content indicated by the texture or graphic imprint 14 on both sides of each sub-metal block 11 is different, and the content indicated by the texture or graphic imprint 14 on both sides of each sub-metal block 11 can be designed according to needs.

[0097] The material of the metal product in the embodiment of the present invention is a precious metal, such as gold, silver or other precious metals; it is understandable that the metal sheet 10 is not limited to precious metals, but may also be other metals.

[0098] Furthermore, the present invention also provides a method for manufacturing the metal product of the above embodiment, see Figure 3 , the method for manufacturing the metal product may include:

[0099] S301: placing a metal sheet 10 with a flat surface into a primary forming chamber 140 of a primary rapid forming cutting die 100 and extruding the metal sheet 10 to obtain a primary semi-finished product 20;

[0100] S302: placing the primary semi-finished product 20 into the secondary forming chamber 230 of the secondary fine forming cutting die 200 and extruding and forming the semi-finished product 20 to obtain a metal product.

[0101] The metal sheet 10 may be made of precious metals, such as gold, silver or other precious metals; it is understandable that the metal sheet 10 is not limited to precious metals, but may also be other metals.

[0102] Among them, see Figure 4A The initial rapid prototyping cutting die 100 may include a die frame 110, a first pressing die 120 and a second pressing die 130 disposed on the die frame 110, at least one of the first pressing die 120 and the second pressing die 130 is slidably disposed on the die frame 110, optionally, the first pressing die 120 is slidably disposed on the die frame 110; optionally, the second pressing die 130 is slidably disposed on the die frame 110; optionally, both the first pressing die 120 and the second pressing die 130 are slidably disposed on the die frame 110. The first pressing die 120 and the second pressing die 130 cooperate to form a primary molding chamber 140. In this embodiment, the first pressing die 120 and the second pressing die 130 can move relative to each other, thereby changing the size of the primary molding chamber 140. In the embodiment of the present invention, the primary molding chamber 140 is a closed chamber.

[0103] The first pressing mold 120 and the second pressing mold 130 are matched in an up-down manner, and the first pressing mold 120 can slide up and down relative to the second pressing mold 130. For example, the first pressing mold 120 is an upper mold and the second pressing mold 130 is a lower mold; for example, the first pressing mold 120 is a lower mold and the second pressing mold 130 is an upper mold. Of course, the first pressing mold 120 and the second pressing mold 130 can also be matched in other directions, such as a left-right matching manner, and the first pressing mold 120 can slide left-right relative to the second pressing mold 130. For example, the first pressing mold 120 is a left mold and the second pressing mold 130 is a right mold.

[0104] When the first pressing mold 120 and the second pressing mold 130 are in an up-and-down matching manner, when the metal sheet 10 is placed in the primary forming bin 140, the thickness direction of the metal sheet 10 is parallel to the up-and-down direction; when the first pressing mold 120 and the second pressing mold 130 are in a left-and-right matching manner, when the metal sheet 10 is placed in the primary forming bin 140, the thickness direction of the metal sheet 10 is parallel to the left-and-right direction.

[0105] Furthermore, a plurality of first cutting edges 150 arranged at intervals are provided on one side of the first pressing die 120 facing the second pressing die 130. The first cutting edges 150 are conical and located in the primary forming chamber 140. The top of the first cutting edges 150 is rounded, and the height of the first cutting edges 150 is less than the thickness of the metal sheet 10. In this embodiment, the width of the first cutting edges 150 on the side close to the first pressing die 120 is greater than the height of the first cutting edges 150.

[0106] Please combine Figure 4A and Figure 4B The process of processing the metal sheet 10 by the primary rapid prototyping cutting die 100 may include: placing the metal sheet 10 with a flat surface into the primary prototyping chamber 140 of the primary rapid prototyping cutting die 100, controlling the movement of the first pressing die 120 toward the second pressing die 130, so that the first cutting edge 150 squeezes the metal sheet 10, thereby forming a primary V-shaped groove 21 on one side of the metal sheet 10. It can be understood that the primary V-shaped groove 21 is a V-shaped groove with a rounded top, and because the width of the first cutting edge 150 close to the first pressing die 120 is greater than the height of the first cutting edge 150, the opening width of the primary V-shaped groove 21 is greater than the depth of the primary V-shaped groove 21.

[0107] Exemplarily, a large-tonnage four-column hydraulic press is used to perform large-tonnage, precision extrusion molding on the first pressing die 120 and the second pressing die 130, so that the precious metal sheet 10 can be fully extruded and flowed in the closed primary molding chamber 140, and quickly and accurately form a block-shaped primary semi-finished product 20 with a calibrated shape and thickness. The primary semi-finished product 20 is divided into a plurality of small blocks, and primary V-grooves 21 are provided between each small block.

[0108] Please combine Figure 5A The secondary fine molding and cutting die 200 may include a third pressing die 210 and a fourth pressing die 220 that are adapted to each other. The third pressing die 210 and the fourth pressing die 220 cooperate to form a secondary molding chamber 230. The third pressing die 210 and the fourth pressing die 220 can move relative to each other, thereby changing the size of the secondary molding chamber 230. Optionally, the precision of the secondary fine molding and cutting die 200 is ±2μm to meet the processing precision requirements.

[0109] The third pressing mold 210 and the fourth pressing mold 220 are matched in an up-down manner, and the third pressing mold 210 can slide up and down relative to the fourth pressing mold 220. For example, the third pressing mold 210 is an upper mold and the fourth pressing mold 220 is a lower mold; for example, the third pressing mold 210 is a lower mold and the fourth pressing mold 220 is an upper mold. Of course, the third pressing mold 210 and the fourth pressing mold 220 can also be matched in other directions, such as a left-right matching manner, and the third pressing mold 210 can slide left-right relative to the fourth pressing mold 220. For example, the third pressing mold 210 is a left mold and the fourth pressing mold 220 is a right mold.

[0110] When the third pressing die 210 and the fourth pressing die 220 are in a vertical matching mode, when the metal sheet 10 is placed in the primary molding bin 140, the thickness direction of the metal sheet 10 is parallel to the vertical direction; when the third pressing die 210 and the fourth pressing die 220 are in a horizontal matching mode, when the metal sheet 10 is placed in the primary molding bin 140, the thickness direction of the metal sheet 10 is parallel to the horizontal direction. Further, the fourth pressing die 220 is provided with a plurality of second cutting edges 240 arranged at intervals on one side facing the third pressing die 210, wherein the number of the second cutting edges 240 is equal to the number of the first cutting edges 150, the second cutting edges 240 are cone-shaped, and the tops of the second cutting edges 240 are all precise sharp corners, the sharp corner accuracy of the second cutting edges 240 is greater than or equal to 0.005 mm and less than or equal to 0.02 mm, and the second cutting edges 240 are located in the secondary molding bin 230. The taper angle of the second cutting edge 240 is equal to the taper angle of the first cutting edge 150 , the width of the second cutting edge 240 close to the fourth pressing mold 220 is equal to the width of the first cutting edge 150 close to the first pressing mold 120 , and the width of the second cutting edge 240 close to the fourth pressing mold 220 is greater than the height of the second cutting edge 240 .

[0111] Please combine Figure 2A and Figure 5A The process of processing the primary semi-finished product 20 by the secondary fine molding cutting die 200 may include: placing the primary semi-finished product 20 into the secondary molding bin 230 so that the multiple primary V-grooves 21 are aligned with the multiple second cutting edges 240, pressing the third pressing die 210 on the fourth pressing die 220 so that the multiple second cutting edges 240 correspond to the multiple primary V-grooves 21 on the primary semi-finished product 20, so that the multiple primary V-grooves 21 on the primary semi-finished product 20 form the first V-groove 12 of the metal product, that is, the primary V-groove 21 is precisely processed by the second cutting edge 240 so that the primary V-groove 21 is changed from a rounded corner to a precise sharp corner.

[0112] Exemplarily, a four-column hydraulic press is used to perform uniform low-gravity slight extrusion on the third pressing die 210 and the fourth pressing die 220, and the surface of the primary semi-finished product 20 is finely micro-processed, so that the primary V-groove 21 of the primary semi-finished product 20 is transformed into an extremely fine first V-groove 12, thereby obtaining a metal product.

[0113] Optionally, the fourth pressing die 220 includes a first groove, and when the third pressing die 210 cooperates with the fourth pressing die 220, the third pressing die 210 covers the first groove to form a secondary molding chamber 230. By providing the first groove, it is convenient to put the primary semi-finished product 20. Optionally, the thickness of the metal sheet 10 is greater than the depth of the first groove. Of course, in other embodiments, the thickness of the metal sheet 10 can also be less than or equal to the depth of the first groove.

[0114] Optionally, the third pressing die 210 includes a second groove, and when the third pressing die 210 cooperates with the fourth pressing die 220, the first groove and the second groove form a secondary molding chamber 230. It should be understood that the third pressing die 210 may not be provided with the second groove.

[0115] The structure and weight of each sub-metal block 11 obtained by dividing the metal product obtained by the above processing along the first V-shaped groove 12 are the same, or the structures of the multiple sub-metal blocks 11 are at least partially different.

[0116] Optionally, a plurality of first cutting edges 150 are evenly spaced apart on a side of the first pressing die 120 facing the second pressing die 130, and a plurality of second cutting edges 240 are evenly spaced apart on a side of the fourth pressing die 220 facing the third pressing die 210, so that the structure and weight of each sub-metal block 11 obtained by dividing the processed metal product along the first V-groove 12 are the same.

[0117] Optionally, the cone angle of the first cutting edge 150 is greater than 60 degrees and less than or equal to 150 degrees. For example, the cone angle of the first cutting edge 150 is 65 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees or other angles greater than 60 degrees and less than 150 degrees, so as to protect the first cutting edge 150 from breaking, damage, deformation and affecting the processing accuracy and efficiency during high gravity and high efficiency extrusion operations, so as to improve the service life and accuracy of the initial rapid prototyping cutting mold 100, greatly improve production efficiency and reduce production costs. Further optionally, the cone angle of the second cutting edge 240 is equal to the cone angle of the first cutting edge 150.

[0118] For further information, please see Figure 5AThe apex of the second cutting edge 240 is lower than the side surface 270 of the fourth pressing die, and the distance between the apex of the second cutting edge 240 and the side surface 270 of the fourth pressing die is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. With this design, after the primary V-groove 21 is processed by the second cutting edge 240, the primary semi-finished product 20 will not be completely cut apart. At the same time, it is more conducive to protecting the second cutting edge 240 from directly contacting the opposite third pressing die 210 during operation to cause the sharp corner of the second cutting edge 240 to break, be damaged, or deform, thereby affecting the processing precision. The secondary fine molding cutting die 200 uses cemented carbide with high hardness and wear resistance as the mold material to greatly improve the service life and yield rate of the mold, and further reduce the production cost.

[0119] For example, see Figure 5A The side surface 270 of the fourth pressing mold is in abutment with the third pressing mold 210 , and the secondary molding chamber 230 is formed between the side of the fourth pressing mold 220 and the third pressing mold 210 .

[0120] Optionally, a side portion is provided at the edge of the fourth pressing die 220, and the height of the side portion is the same as the thickness of the metal product, so as to protect the primary semi-finished product 20 from being over-extruded during the secondary fine molding.

[0121] In some embodiments, see Figure 5B A plurality of third cutting edges 250 arranged at intervals are provided on one side of the third pressing die 210 facing the fourth pressing die 220. The number of the third cutting edges 250 is equal to the number of the second cutting edges 240. The third cutting edges 250 are conical and are located in the secondary molding bin 230. The top angle of the third cutting edge 250 is a precise sharp angle. The top angle of the third cutting edge 250 has a sharp angle accuracy greater than or equal to 0.005 mm and less than or equal to 0.02 mm. The top angle of the third cutting edge 250 is directly opposite to the top angle of the second cutting edge 240, and the cone angle of the third cutting edge 250 is equal to the cone angle of the second cutting edge 240. The third cutting edge 250 corresponds to the side of the primary semi-finished product 20 that is away from the primary V-groove 21, so that the second V-groove 13 of the metal product is formed on the primary semi-finished product 20.

[0122] Further optionally, the height of the third cutting edge 250 is lower than that of the second cutting edge 240 , so that the second V-shaped groove 13 obtained by machining the second cutting edge 240 on the primary semi-finished product 20 has an auxiliary splitting function.

[0123] Accordingly, in order to ensure that the structures and weights of the metal sub-blocks obtained by dividing the processed metal product are the same, a plurality of third cutting edges 250 are evenly spaced and arranged on the side of the third pressing die 210 facing the fourth pressing die 220 .

[0124] Optionally, the cone angle of the third cutting edge 250 is greater than 60 degrees and less than or equal to 150 degrees. Exemplarily, the cone angle of the third cutting edge 250 is 65 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees or other angles greater than 60 degrees and less than 150 degrees.

[0125] The width of the third cutting edge 250 close to the third pressing mold 210 may be smaller than the height of the third cutting edge 250 , or the width of the third cutting edge 250 close to the third pressing mold 210 may be substantially equal to the height of the third cutting edge 250 .

[0126] It can be understood that the first cutting edge 150, the second cutting edge 240, the third cutting edge 250 and the fourth cutting edge are all protruding structures, and the first cutting edge 150, the second cutting edge 240 and the third cutting edge 250 are all symmetrical structures.

[0127] For further information, please see Figure 5A A plurality of texture or graphic mark forming parts 260 are provided on one side of the third pressing die 210 facing the fourth pressing die 220 and / or on one side of the fourth pressing die 220 facing the third pressing die 210, and a texture or graphic mark forming part 260 is provided between adjacent second cutting edges 240. When the primary semi-finished product 20 is processed by the secondary fine forming cutting die 200, the texture or graphic mark forming part 260 can extrude the primary semi-finished product 20, so that the texture or graphic mark 14 of the metal product is formed on at least one side of the surface of the primary semi-finished product 20.

[0128] For example, a plurality of texture or graphic imprint forming parts 260 are respectively provided on one side of the third pressing mold 210 facing the fourth pressing mold 220 and on one side of the fourth pressing mold 220 facing the third pressing mold 210. Figure 5B A texture or graphic mark forming portion 260 is respectively provided between adjacent second cutting edges 240 and adjacent third cutting edges 250. When the primary semi-finished product 20 is processed by the secondary fine molding cutting die 200, the texture or graphic mark forming portion 260 can extrude the primary semi-finished product 20 so that the texture or graphic mark 14 of the metal product is formed on both side surfaces of the primary semi-finished product 20.

[0129] Optionally, the texture or graphic imprint forming part 260 on the third pressing mold 210 is symmetrical with the texture or graphic imprint forming part 260 on the fourth pressing mold 220, so that the textures formed on the two side surfaces of the primary semi-finished product 20 are symmetrical; of course, the texture or graphic imprint forming part 260 on the third pressing mold 210 and the texture or graphic imprint forming part 260 on the fourth pressing mold 220 may also be asymmetrical.

[0130] After the primary semi-finished product 20 is processed by the secondary fine forming cutting die 200 shown in 5A, the Figure 2A The metal product shown in FIG5B can be obtained by processing the primary semi-finished product 20 with the secondary fine forming cutting die 200 shown in FIG5B. Figure 2B Metalwork shown.

[0131] In addition, in some embodiments, after the primary semi-finished product 20 is placed in the secondary molding chamber 230 of the secondary fine molding cutting die 200 and extruded to obtain a metal product, the process further includes: segmenting the metal product along the first V-shaped groove 12 and the second V-shaped groove 13 to obtain a plurality of mutually separated sub-metal blocks 11. The segmentation can be performed manually or by using a simple tool.

[0132] Furthermore, an embodiment of the present invention also provides a mold assembly for manufacturing the metal product of the first aspect, wherein the mold assembly includes a primary rapid prototyping cutting mold 100 and a secondary fine prototyping cutting mold 200 .

[0133] Among them, the initial rapid prototyping cutting die 100 includes a mold frame 110, a first pressing mold 120 and a second pressing mold 130 arranged on the mold frame 110, at least one of the first pressing mold 120 and the second pressing mold 130 is slidably arranged on the mold frame 110, and the first pressing mold 120 and the second pressing mold 130 cooperate to form a primary molding bin 140, and the first pressing mold 120 is provided with a plurality of first cutting edges 150 arranged at intervals on the side facing the second pressing mold 130 of the first pressing mold 120, the first cutting edge 150 is conical and is located in the primary molding bin 140, the top of the first cutting edge 150 is rounded, and the height of the first cutting edge 150 is less than the thickness of the metal sheet 10, and the width of the first cutting edge 150 on the side close to the first pressing mold 120 is greater than the height of the first cutting edge 150.

[0134] The secondary fine molding cutting die 200 includes a third pressing die 210 and a fourth pressing die 220 that are matched with each other. The third pressing die 210 and the fourth pressing die 220 cooperate to form a secondary molding chamber 230. The fourth pressing die 220 is provided with a plurality of second cutting edges 240 arranged at intervals on one side facing the third pressing die 210. The number of the second cutting edges 240 is equal to that of the first cutting edges 150. The second cutting edges 240 are conical and located in the secondary molding chamber 230. The top of the second cutting edges 240 The second cutting edge 240 has a sharp angle, the angle precision of which is greater than or equal to 0.005 mm and less than or equal to 0.02 mm, the cone angle of the second cutting edge 240 is equal to the cone angle of the first cutting edge 150, the width of the second cutting edge 240 on the side close to the fourth pressing mold 220 is equal to the width of the first cutting edge 150 on the side close to the first pressing mold 120, and the width of the second cutting edge 240 on the side close to the fourth pressing mold 220 is greater than the height of the second cutting edge 240.

[0135] When the metal sheet 10 with a smooth surface is placed in the primary forming chamber 140 of the primary rapid forming cutting die 100 and extruded, the first cutting edge 150 can extrude the metal sheet 10 so that a primary V-shaped groove 21 is formed on one side of the metal sheet 10 to obtain a primary semi-finished product 20.

[0136] When the primary semi-finished product 20 is placed in the secondary molding chamber 230 of the secondary fine molding cutting die 200 and extruded, the multiple second cutting edges 240 correspond to the multiple primary V-grooves 21 on the primary semi-finished product 20, so that the multiple primary V-grooves 21 on the primary semi-finished product 20 form the first V-grooves 12 of the metal product.

[0137] In some embodiments, a plurality of first cutting edges 150 are evenly spaced apart on a side of the first pressing die 120 facing the second pressing die 130 , and a plurality of second cutting edges 240 are evenly spaced apart on a side of the fourth pressing die 220 facing the third pressing die 210 .

[0138] In some embodiments, the taper angle of the first cutting edge 150 is greater than 60 degrees and less than or equal to 150 degrees.

[0139] In some embodiments, the apex of the second cutting edge 240 is lower than the side surface 270 of the fourth pressing die 220, and the distance between the apex of the second cutting edge 240 and the side surface 270 of the fourth pressing die 220 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. The side surface 270 of the fourth pressing die 220 abuts against the side surface of the third pressing die 210, and the secondary molding chamber 230 is formed between the side of the fourth pressing die 220 and the side of the third pressing die 210.

[0140] In some embodiments, the metal sheet 10 is made of precious metal.

[0141] In some embodiments, a plurality of third cutting edges 250 are provided at intervals on the side of the third pressing die 210 facing the fourth pressing die 220, the number of the third cutting edges 250 is equal to the number of the second cutting edges 240, the third cutting edges 250 are conical and are located in the secondary molding bin 230, the top angle of the third cutting edge 250 is a precise sharp angle, the precision of the sharp angle of the third cutting edge 250 is greater than or equal to 0.005 mm and less than or equal to 0.02 mm, the top angle of the third cutting edge 250 is opposite to the top angle of the second cutting edge 240, and the cone angle of the third cutting edge 250 is equal to the cone angle of the second cutting edge 240, when the primary semi-finished product 20 is placed in the secondary molding bin 230 of the secondary fine molding cutting die 200 and extruded, the third cutting edge 250 corresponds to the side of the primary semi-finished product 20 that is away from the primary V-groove 21, so that the second V-groove 13 of the metal product is formed on the primary semi-finished product 20.

[0142] In some embodiments, the height of the third cutting edge 250 is lower than the height of the second cutting edge 240 .

[0143] In some embodiments, the plurality of third cutting edges 250 are evenly spaced and arranged on a side of the third pressing die 210 facing the fourth pressing die 220 .

[0144] In some embodiments, the taper angle of the third cutting edge 250 is greater than 60 degrees and less than or equal to 150 degrees.

[0145] In some embodiments, a plurality of texture or graphic imprint forming portions 260 are provided on the side of the third pressing mold 210 facing the fourth pressing mold 220 and / or on the side of the fourth pressing mold 220 facing the third pressing mold 210, and a texture or graphic imprint forming portion 260 is provided between adjacent second cutting edges 240 and / or between adjacent third cutting edges 250, respectively.

[0146] In some embodiments, the texture or graphic imprint forming part 260 on the third pressing die 210 is symmetrical with the texture or graphic imprint forming part 260 on the fourth pressing die 220. The texture or graphic imprint forming part 260 can extrude the primary semi-finished product 20 so that the texture or graphic imprint 14 of the metal product is formed on both side surfaces of the primary semi-finished product 20.

[0147] The structure of the mold assembly of the embodiment of the present invention can be explained and illustrated with reference to the corresponding parts in the above embodiments, which will not be repeated here.

[0148] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A metal product, characterized in that: include: A metal body (1), the metal body (1) being evenly divided into a plurality of sub-metal blocks (11) of preset shapes, at least one side of each sub-metal block (11) being provided with a texture or graphic mark (14), and the plurality of sub-metal blocks (11) being in an array; Adjacent sub-metal blocks (11) are connected, and a first V-shaped groove (12) is formed at the connection; The first V-shaped groove (12) is provided with a sharp angle and a calibrated shape; Placing a metal sheet (10) with a flat surface into a primary molding chamber (140) of a primary molding cutting die (100) for extrusion molding to obtain a primary semi-finished product (20); placing the primary semi-finished product (20) into a secondary molding chamber (230) of a secondary molding cutting die (200) for extrusion molding to obtain a metal product; The primary molding cutting die (100) comprises a die frame (110), a first pressing die (120) and a second pressing die (130) arranged on the die frame (110); at least one of the first pressing die (120) and the second pressing die (130) is slidably arranged on the die frame (110); a plurality of first cutting edges (150) arranged at intervals are arranged on a side of the first pressing die (120) facing the second pressing die (130); the first cutting edges (150) are conical, the top of the first cutting edges (150) is rounded, the height of the first cutting edges (150) is less than the thickness of the metal sheet (10), and the width of the first cutting edges (150) on a side close to the first pressing die (120) is greater than the height of the first cutting edges (150); The secondary molding cutting die (200) comprises a third pressing die (210) and a fourth pressing die (220) which are matched with each other. A plurality of second cutting edges (240) arranged at intervals are provided on a side of the fourth pressing die (220) facing the third pressing die (210). The number of the second cutting edges (240) is equal to that of the first cutting edges (150). The second cutting edges (240) are conical and have sharp corners at the top. The precision of the sharp corners is greater than or equal to 0.005 mm and less than or equal to 0.02 mm. The second cutting edges (240) and the first cutting edges (150) have the same cone angle. The width of the second cutting edges (240) on the side close to the fourth pressing die (220) is equal to the width of the first cutting edges (150) on the side close to the first pressing die (120). The width of the second cutting edges (240) on the side close to the fourth pressing die (220) is greater than the height of the second cutting edges (240). Metal products are made of precious metals.

2. The metal product according to claim 1, characterized in that: The top angle of the first V-shaped groove (12) is a sharp angle, and the accuracy of the sharp angle of the first V-shaped groove (12) is greater than or equal to 0.005 mm and less than or equal to 0.02 mm; and / or, The apex angle bisector of the first V-shaped groove (12) is perpendicular to the bottom surface of the sub-metal block (11), and the apex angle of the first V-shaped groove (12) is greater than 60 degrees and less than or equal to 150 degrees; and / or, The opening width of the first V-shaped groove (12) is greater than or equal to the depth of the first V-shaped groove (12); and / or, The vertical distance from the vertex of the first V-shaped groove (12) to the bottom surface of the sub-metal block (11) is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

3. The metal product according to claim 1 or 2, characterized in that: The multiple sub-metal blocks (11) have the same shape.

4. The metal product according to claim 3, characterized in that: The sub-metal block (11) is in the shape of a square, a rectangle, a rhombus or a triangle.

5. The metal product according to claim 1, characterized in that: By applying force to the sub-metal blocks on both sides of the first V-shaped groove (12), adjacent sub-metal blocks (11) can be separated along the first V-shaped groove, and the error between the weight of the sub-metal blocks (11) after separation and the calibrated weight is less than or equal to +0.01g and greater than or equal to -0.01g.

6. The metal product according to claim 1, characterized in that: A second V-shaped groove (13) is formed on the other side of the connection between adjacent sub-metal blocks (11), the top angle of the second V-shaped groove (13) is a sharp angle, and the precision of the sharp angle of the second V-shaped groove (13) is greater than or equal to 0.005 mm and less than or equal to 0.02 mm; The top angle of the first V-shaped groove (12) is directly opposite to the top angle of the second V-shaped groove (13).

7. The metal product according to claim 6, characterized in that The depth of the first V-shaped groove (12) is greater than the depth of the second V-shaped groove (13); and / or The apex angle bisector of the second V-shaped groove (13) is perpendicular to the bottom surface of the sub-metal block (11), and the apex angle of the second V-shaped groove (13) is greater than 60 degrees and less than or equal to 150 degrees; and / or, The opening width of the second V-shaped groove (13) is greater than or equal to the depth of the second V-shaped groove (13); and / or the distance between the vertex of the first V-shaped groove (12) and the vertex of the second V-shaped groove (13) is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

8. The metal product according to claim 1, characterized in that: Both sides of each of the sub-metal blocks (11) are respectively provided with textures or graphic marks (14).

9. The metal product according to claim 1, characterized in that: A plurality of the first cutting edges (150) are evenly spaced and arranged on a side of the first pressing die (120) facing the second pressing die (130), and a plurality of the second cutting edges (240) are evenly spaced and arranged on a side of the fourth pressing die (220) facing the third pressing die (210).

10. The metal product according to claim 1 or 9, characterized in that: The cone angle of the first cutting edge (150) is greater than 60 degrees and less than or equal to 150 degrees.

11. The metal product according to claim 1, characterized in that The apex of the second cutting edge (240) is lower than the side surface (270) of the fourth pressing die (220), and the distance between the apex of the second cutting edge (240) and the side surface (270) of the fourth pressing die (220) is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. The side surface (270) of the fourth pressing die (220) is abutted against the side surface of the third pressing die (210), and the secondary molding chamber (230) is formed between the side of the fourth pressing die (220) and the side of the third pressing die (210).

12. The metal product according to claim 1, characterized in that A plurality of third cutting edges (250) arranged at intervals are provided on a side of the third pressing die (210) facing the fourth pressing die (220); the number of the third cutting edges (250) is equal to the number of the second cutting edges (240); the third cutting edges (250) are conical and located in the secondary molding chamber (230); the top angle of the third cutting edge (250) is a sharp angle; the precision of the sharp angle of the third cutting edge (250) is greater than or equal to 0.005 mm and less than or equal to 0.02 mm; the top angle of the third cutting edge (250) is directly opposite to the top angle of the second cutting edge (240); and the taper angle of the third cutting edge (250) is equal to the taper angle of the second cutting edge (240); the third cutting edge (250) is correspondingly extruded on a side of the primary semi-finished product (20) away from the primary V-shaped groove (21), so that the second V-shaped groove (13) of the metal product is formed on the primary semi-finished product (20).

13. The metal product according to claim 12, characterized in that The height of the third cutting edge (250) is lower than the height of the second cutting edge (240); and / or, The plurality of third cutting edges (250) are evenly spaced and arranged on a side of the third pressing die (210) facing the fourth pressing die (220); and / or, The cone angle of the third cutting edge (250) is greater than 60 degrees and less than or equal to 150 degrees.

14. The metal product according to claim 12, characterized in that A plurality of texture or graphic mark forming parts (260) are provided on a side of the third pressing die (210) facing the fourth pressing die (220) and / or a side of the fourth pressing die (220) facing the third pressing die (210), and one of the texture or graphic mark forming parts (260) is provided between adjacent second cutting edges (240) and / or between adjacent third cutting edges (250).

15. The metal product according to claim 14, characterized in that A side of the third pressing die (210) facing the fourth pressing die (220) and a side of the fourth pressing die (220) facing the third pressing die (210) are respectively provided with a plurality of texture or graphic imprint forming parts (260); The texture or graphic mark forming part (260) is capable of extruding the primary semi-finished product (20) so that the texture or graphic mark (14) of the metal product is formed on both side surfaces of the primary semi-finished product (20).

16. The metal product according to claim 1, characterized in that After placing the primary semi-finished product (20) into a secondary molding chamber (230) of a secondary molding cutting die (200) and extruding the same to obtain the metal product, the method further comprises: The metal product is divided along the first V-shaped groove (12) to obtain a plurality of mutually separated sub-metal blocks (11).

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