Die for continuous extruder of silver metal and continuous extruder

Abstract

The present invention provides a die and a continuous extruder for a silver metal continuous extruder, wherein the die comprises a die body, wherein the inner side wall of the die body is provided with a guide protrusion, wherein the guide protrusion is triangular in shape, and the first corner of the guide protrusion is located in the middle of the long side of a forming through hole, and both sides of the first corner of the guide protrusion have guide protrusions inclined toward the two short sides of the forming through hole. The forming through hole comprises a forming inlet end and an extrusion outlet end, and the die body is defined as an extrusion part near the extrusion outlet end, and the inner side wall of the extrusion part where the guide protrusion is located is gradually inclined along the extrusion outlet end to be flush with the guide protrusion. By setting a triangular guide protrusion in the forming through hole, the silver metal can be successfully guided and diffused in the length direction along the two guide protrusions in the forming through hole, so that when the silver metal is extruded, the shape is stable and consistent with the extrusion outlet, and the metal density is uniform.

Description

Technical Field

[0001] The present invention relates to the field of metal forming machines, in particular to a die of a continuous extruder for silver metal and a continuous extruder. Background Art

[0002] Since silver metal has good ductility, electrical conductivity and heat transfer, it is in great demand in the processing market. For mass production, the market often requires plate-shaped silver bars of the same standard shape, size and uniform density. The existing technology adopts a method of first casting and then manual forging for production. Although the silver metal loss is small, the production efficiency is low, the outer surface is not smooth and flat, and the density of the finished product is uneven, which cannot meet the needs of high-precision industrial production.

[0003] Continuous extruders generally extrude strip metal and block blocks through the cooperation of extrusion wheels and compaction wheels, and use the heat generated by extrusion friction to increase the temperature, so that the metal enters the exit of the extrusion cavity after high-temperature deformation, and then flows into the mold. According to the structural shape of the mold, it can produce predetermined continuous shapes such as strips, rows, and strips. And because the forming process is hot extrusion plastic forming, it can eliminate the influence of raw material surface defects and mechanical damage on product quality. The product surface will not have defects such as warping and burrs that are very easy to appear in traditional process methods.

[0004] In actual use, continuous extruders are mainly used to extrude copper bars, which have smooth burr-free surfaces, stable shapes, and uniform density. However, if continuous extruders are used directly to produce silver bars, the silver metal will flow out from the middle before being formed to the predetermined width, due to the inconsistency between the texture of silver metal and copper. This will result in unstable cross-sectional shapes and uneven density of the finished silver bars, which cannot meet production needs. Summary of the invention

[0005] The invention provides a die for a continuous extruder of silver metal and a continuous extruder, aiming to solve the problems of uneven density and low production efficiency of finished silver bars.

[0006] The present invention is achieved in that:

[0007] A die for a continuous extruder of silver metal comprises a die body, wherein a rectangular forming through hole is provided in the die body.

[0008] The inner wall of the mold body is provided with a guide protrusion, which is triangular in shape, and the first corner of the guide protrusion is located in the middle of the long side of the forming through hole. Both sides of the first corner of the guide protrusion have guide protrusions inclined toward the two short sides of the forming through hole.

[0009] The forming through hole includes a forming inlet end and an extrusion outlet end, and the die body is defined as an extrusion portion near the extrusion outlet end. The inner side wall of the extrusion portion where the guide protrusion is located gradually tilts along the extrusion outlet end direction until it is flush with the guide protrusion.

[0010] In a preferred embodiment of the present invention:

[0011] As a further improvement, there are two guide bumps, which are respectively arranged on the inner side walls of the mold body at the two long sides of the forming through hole.

[0012] As an improvement, the first corner of the guide protrusion is arranged close to the molded inlet end.

[0013] As a further improvement, the four inner side wall surfaces at the rear end of the extrusion portion are arranged in parallel in pairs.

[0014] As a further improvement, the mold body includes a molding pad and an extrusion die which are arranged adjacent to each other up and down, the molding pad has an upper protrusion of the guide protrusion, and the extrusion die has a lower protrusion in the guide protrusion which is continuous with the upper protrusion.

[0015] As an improvement, the forming pad includes a left pad block and a right pad block that can be separated from each other.

[0016] As an improvement, the included angle of the first angle is 60° to 120°.

[0017] The present invention also provides a continuous extruder, comprising an extrusion wheel, a compaction wheel, a material blocking block, an extrusion cavity, and the above-mentioned die, wherein the die is installed at the outlet position of the extrusion cavity.

[0018] As a further improvement, the continuous extruder further comprises a conveying device located at the extrusion outlet end of the die, and a cutting mechanism arranged on the conveying device, wherein the cutting mechanism is used to cut the silver row extruded from the die into silver row segments of unit length.

[0019] The beneficial effect of the present invention is that the die for the continuous extruder of silver metal provided by the present invention is specifically for metal materials such as silver that are too soft and have too good fluidity after heating, or metal materials with properties similar to silver. By setting a triangular guide protrusion in the forming through hole, the silver metal can be successfully guided and diffused in the length direction along the two guide protrusions in the forming through hole, so that when the silver metal is extruded, the shape is stable and consistent with the extrusion outlet, and the metal density is uniform. This avoids the traditional mold or dumbbell-shaped through hole mold from extruding the silver metal into a product with an unstable cross-sectional shape and uneven density.

[0020] Furthermore, the continuous extruder provided by the present invention also includes a cutting mechanism, through which the silver bar is cut into silver bar segments of unit length, so as to achieve the effect of batch production of silver metal standard blocks, reduce the production cost of existing silver metal blocks, improve production efficiency, and facilitate the standardized market application of silver metal blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of a top view of a die of a continuous extruder for silver metal according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 AA direction cross-sectional schematic diagram;

[0024] Figure 3 yes Figure 1 BB direction cross-sectional schematic diagram;

[0025] Figure 4 yes Figure 1 A schematic diagram of the structure of an extrusion die;

[0026] Figure 5 yes Figure 1 Schematic diagram of the structure of the forming pad.

[0027] icon:

[0028] The mold body 1 , the molding pad 11 , the extrusion die 12 , the left pad 13 , the right pad 14 , the molding through hole 2 , the guide protrusion 3 , the upper protrusion 31 , the lower protrusion 32 , and the first corner 33 . DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] Please refer to Figures 1 to 5 A die for a continuous extruder of silver metal comprises a die body 1. A rectangular forming through hole 2 is provided in the die body 1, and the forming through hole 2 comprises a forming inlet end and an extrusion outlet end.

[0035] like Figure 3 The upper and lower ends of the forming through hole 2 are respectively a forming inlet end and an extrusion outlet end. The forming inlet end is used to receive the silver metal material flowing out of the extrusion cavity of the continuous extruder, and the extrusion outlet end is used to extrude the silver metal material passing through the forming through hole 2 into a silver row shape and transport it out.

[0036] The inner wall of the mold body 1 is provided with a guide protrusion 3, which is triangular in shape, and a first corner 33 of the guide protrusion 3 is located in the middle of the long side of the forming through hole 2, and the first corner 33 is located on the side away from the extrusion outlet end.

[0037] The first corner 33 of the guide protrusion 3 has guide protrusions on both sides that are inclined toward the two short sides of the forming through hole 2. By setting the triangular guide protrusion 3 in the forming through hole 2, the silver metal can be successfully guided and diffused in the length direction along the two guide protrusions in the forming through hole 2.

[0038] The die body 1 is defined as an extrusion portion near the extrusion outlet end. Figure 4 The inner side wall where the guide protrusion 3 of the extrusion part is located is gradually inclined along the direction of the extrusion outlet end to be flush with the guide protrusion 3. By setting the inner side wall where the guide protrusion 3 is located, the forming through hole 2 is gradually thinned from the inlet end to the outlet end, so that the silver metal can be more fully gathered together and extruded out from the forming channel 2 of the extrusion part, so that the shape of the formed silver row is stable and consistent with the extrusion outlet, and the metal density is uniform.

[0039] The die for the continuous extruder of silver metal provided by the present invention is specially designed for metal materials such as silver which are too soft and have too good fluidity after heating, or metal materials with properties similar to silver. It avoids the situation that when the traditional die or dumbbell-shaped through-hole die is used to extrude the silver metal, the silver metal has too good fluidity core and is squeezed out of the die body before being fully diffused in the length direction of the forming through-hole 2, so that the cross-sectional shape of the finished silver bar is unstable and the density is uneven.

[0040] In this embodiment, there are two guide bumps 3, which are respectively arranged on the inner side walls of the mold body at the two long sides of the forming through hole 2. Therefore, when the silver metal is guided to the two sides, it is also convenient to guide the silver metal to the middle part of the forming through hole 2, and then be extruded into a silver row with uniform density.

[0041] In other embodiments, there may be only one guide protrusion 3 located on one of the inner side walls of the mold body 1 , which can also guide the silver metal to the two sides of the short sides of the molding channel 2 .

[0042] The angle of the first corner 33 of the guide protrusion 3 is preferably 60° to 120°, wherein the setting of the angle is related to the height of the mold body, so that the silver metal can be diverted to the forming through hole 2 that fully fills the extrusion part through the guide convex edges on both sides of the first corner 33, so that the cross-sectional shape of the extruded silver row is complete and the density is uniform. In this embodiment, the angle of the first corner 33 of the guide protrusion 3 is 95°, and the length of the opposite side of the first corner 33 of the guide protrusion 3 is two-thirds of the long side of the forming through hole 2.

[0043] In order to make full use of the fluidity of the silver metal after absorbing heat in the continuous extruder, reduce the thickness of the mold body, and reduce the pressure of the guide protrusion 3, in this embodiment, the first corner 33 of the guide protrusion 3 is set close to the molding inlet end.

[0044] In order to allow the silver metal to be more fully gathered in the thickness direction of the formed through hole 2, in the embodiment of the present invention, the guide protrusions 3 on both side walls are inclined from the outlet end to the inlet end in a direction close to each other. The shape of the inner side wall of the matching extrusion part is changed to gradually reduce the thickness of the formed through hole outlet position.

[0045] In order to make the surface of the silver bar smoother and the shape more stable, in this embodiment, the four inner side walls at the rear end of the extrusion portion are arranged in parallel in pairs.

[0046] Preferably, at the upper end of the extrusion portion, the inner side walls of the two short sides of the forming through hole 2 are inclined toward each other, so as to further compact the silver metal material in the forming through hole 2 .

[0047] The mold body 1 and the guide protrusion 3 can be integrally formed.

[0048] In this embodiment, since the mold is often made of heavy metal, in order to reduce the weight when installing the mold body 1, the mold body 1 is divided into a molding pad 11 and an extrusion die 12 which are adjacently arranged up and down.

[0049] The molding pad 11 has an upper protrusion 31 of the guide protrusion 3, the upper protrusion 31 is triangular, and the upper protrusion 31 is integrally formed with the molding pad 11. The extrusion die 12 has a lower protrusion 32 of the guide protrusion 3 that is continuous with the upper protrusion 31, the lower protrusion 32 is in an isosceles trapezoidal shape, and the extrusion die 12 and the lower protrusion 32 are integrally formed.

[0050] Further, in order to reduce the difficulty of casting and further reduce the weight of the mold body 1 when installing, the molding pad 11 includes a left pad block 13 and a right pad block 14 that can be separated from each other. The left pad block 13 and the right pad block 14 are respectively integrally formed with an upper protrusion 31.

[0051] The present invention also provides a continuous extruder, comprising an extrusion wheel, a compaction wheel, a material blocking block, an extrusion cavity, and the above-mentioned die, wherein the die is installed at the outlet position of the extrusion cavity.

[0052] The continuous extruder also includes a conveying device located at the extrusion outlet end of the die, and a cutting mechanism arranged on the conveying device, wherein the cutting mechanism is used to cut the silver row extruded from the die into silver row segments of unit length.

[0053] The silver bar is cut into silver bar segments of unit length by a cutting mechanism, thereby achieving the effect of mass production of silver metal standard blocks, reducing the production cost of existing silver metal blocks, improving production efficiency, and being conducive to the standardized market application of silver metal blocks.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A die for a continuous extruder of silver metal, characterized in that: The mold body comprises a mold body, wherein a rectangular forming through hole is provided in the mold body. The inner side wall of the mold body is provided with a guide protrusion, the guide protrusion is triangular in shape, and the first corner of the guide protrusion is located in the middle of the long side of the forming through hole, and the first corner of the guide protrusion has guide protrusions on both sides inclined toward the two short sides of the forming through hole; The forming through hole includes a forming inlet end and an extrusion outlet end, and the end of the mold body close to the extrusion outlet is defined as an extrusion part, and the inner side wall of the extrusion part where the guide protrusion is located is gradually inclined along the extrusion outlet end direction to be flush with the guide protrusion; The mold body includes a molding pad and an extrusion die which are arranged adjacent to each other up and down. The molding pad has an upper protrusion of the guide protrusion, and the extrusion die has a lower protrusion in the guide protrusion which is continuous with the upper protrusion. The first corner of the guide protrusion is arranged close to the molding inlet end.

2. The die for the continuous extruder of silver metal according to claim 1, characterized in that: There are two guide bumps, which are respectively arranged on the inner side walls of the mold body at two long sides of the forming through hole.

3. The die for the continuous extruder of silver metal according to claim 1, characterized in that: The four inner side wall surfaces at the rear end of the extrusion portion are arranged in parallel in pairs.

4. The die for the continuous extruder of silver metal according to claim 1, characterized in that: The forming pad comprises a left pad block and a right pad block which are separable from each other.

5. The die for the continuous extruder of silver metal according to claim 1, characterized in that: The included angle of the first angle is 60° to 120°.

6. A continuous extruder, characterized in that: It comprises an extrusion wheel, a compaction wheel, a blocking block, an extrusion cavity, and a mold as described in any one of claims 1 to 5, wherein the mold is installed at the outlet position of the extrusion cavity.

7. The continuous extruder according to claim 6, characterized in that It also includes a conveying device located at the extrusion outlet end of the die, and a cutting mechanism, which is used to cut the silver row extruded from the die into silver row segments of unit length.

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