An extrusion die for wide special-shaped copper busbars

Abstract

The present invention discloses an extrusion die for wide-width special-shaped copper busbars. The extruded copper raw material is diverted and drained by two relatively arranged half-drainage plates, and the flow rate of the copper raw material metal flow in each part of the width section is controlled to ensure that the copper raw material metal flow is evenly filled along the width section direction of the special-shaped copper busbar. The diverter and drainage plates and the special-shaped die are designed as two half-piece structures, which is convenient for die assembly and easy to disassemble. The copper strip and the die are not easy to stick together, which reduces the difficulty of demolding, shortens the demolding time, and reduces the damage to the die caused by improper disassembly methods. The sizing hole of the sizing plate is designed according to the structure of the special-shaped copper busbar and is used to regulate the size of the extruded copper busbar to ensure accuracy. In actual production practice, the present invention effectively solves the problems of extrusion cracking, molding difficulty, poor dimensional accuracy, uneven thickness, etc. that occur when wide-width special-shaped copper busbars are extruded by existing extruders, effectively improves the comprehensive yield of the product, extends the service life of the mold, and improves work efficiency.

Description

Technical Field

[0001] The invention relates to the field of copper and copper alloy metal extrusion and drawing, and in particular to an extrusion die for wide special-shaped copper bars. Background Art

[0002] The wide, special-shaped busbars required for copper electrolytic cells are approximately 8 meters long, 260-320 mm wide, and typically have single-peak or double-peak cross-sectional dimensions. These are typically formed using hot-rolled special-shaped rollers or extrusion processes. Due to shortcomings such as poor dimensional precision control, difficulty cleaning surface oxide scale, high overall cost, and poor dimensional precision, hot-rolled special-shaped rollers are not suitable for small-batch production and are being phased out. The continuous extrusion process used to produce wide, special-shaped copper busbars (i.e., those with a width greater than 350 mm, a thickness of 15-20 mm, irregular cross-sectional dimensions, and irregular rectangular cross-sections) faces varying frictional resistance from the center to the ends of the width section during copper metal filling. This results in a faster copper flow rate in the center, but a slower flow rate as frictional resistance increases toward the sides. This makes forming wide, special-shaped copper busbars difficult, leading to quality defects such as edge fission or incomplete extrusion, and excessive thickness on both sides. The original mold structure design failed to effectively divert and guide the flow, resulting in high stress on the mold itself and a short service life. The mold structure was irrational, and when extrusion pressure increased, the copper strip and the mold would easily adhere to each other. Improper mold removal methods could easily damage the mold. In actual production, there were urgent challenges such as high scrap rates for wide, irregular copper busbars, low process yields, and short mold service life. Summary of the Invention

[0003] In view of the shortcomings of the above-mentioned prior art, the present invention provides an extrusion die for wide special-shaped copper busbars, which is used for efficiently forming wide special-shaped copper busbars prepared by an extrusion method.

[0004] The present invention is achieved through the following technical solutions.

[0005] An extrusion die for a wide, special-shaped copper busbar, characterized in that the extrusion die comprises: a diversion plate (1), a special-shaped die (2), and a sizing plate (3) arranged in sequence along a horizontal direction; the diversion plate (1) comprises two half-drainage plates (4) arranged opposite to each other, the half-drainage plates (4) comprise a first fixed plate (5), both ends of the first fixed plate (5) are connected to end plates (6), the middle of the first fixed plate (5) is connected to a diversion plate (7), and the diversion plate (7) and the end plate (6) are located on the same side of the first fixed plate (5); the special-shaped die (2) comprises a template (8), and the template (8) is provided with a die hole (9); the sizing plate (3) comprises a second fixed plate (10), and the second fixed plate (10) is provided with a sizing hole (11).

[0006] Furthermore, the end plates (6) at both ends of the two half-divided drainage plates (4) are opposite to each other.

[0007] Furthermore, one panel surface of the diverter plate (7) is in close contact with the middle portion of one side panel surface of the first fixed plate (5).

[0008] Furthermore, the diverter plate (7) is an obtuse-angled triangular plate.

[0009] Furthermore, the diverter plate (7) is a triangular plate with a slope of 1:1.13-1.15.

[0010] Furthermore, the first fixing plate (5), the second fixing plate (10), and the template (8) are all rectangular plates.

[0011] Furthermore, the end plate (6) is a wedge-shaped plate.

[0012] Furthermore, the special-shaped mold (2) is composed of two half-piece special-shaped molds that can be separated and combined.

[0013] The beneficial technical effects of the present invention are as follows: the present invention provides an extrusion die for a wide-width special-shaped copper busbar, which diverts and drains the extruded copper raw material through two relatively arranged half-drainage plates, controls the flow rate of the copper raw material metal flow in each part of the width section, and ensures that the copper raw material metal flow is evenly filled along the width section direction of the special-shaped copper busbar. The drainage plate and the special-shaped die are designed as two half-piece structures, which is convenient for mold assembly and easy to disassemble. The copper strip and the die are not easy to stick together, which reduces the difficulty of demolding, shortens the demolding time, and reduces the damage to the die caused by improper disassembly methods. The sizing hole of the sizing plate is designed according to the structure of the special-shaped copper busbar, and is used to regularize the size of the extruded copper busbar to ensure accuracy. In actual production practice, it effectively solves the problems of extrusion cracking, molding difficulties, poor dimensional accuracy, uneven thickness, etc. that occur when wide-width special-shaped copper busbars are extruded by existing extruders, effectively improves the comprehensive yield of the product, extends the service life of the mold, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a structural schematic diagram of the diversion plate of the present invention.

[0016] Figure 3 It is a structural schematic diagram of the half-divided drainage plate of the present invention.

[0017] Figure 4 This is a structural schematic diagram of a special-shaped mold used in the present invention.

[0018] Figure 5 for Figure 4 side view.

[0019] Figure 6 This is a structural schematic diagram of a sizing plate used in the present invention.

[0020] Figure 7 for Figure 6 side view.

[0021] Figure 8 This is a schematic structural diagram of another sizing plate used in the present invention.

[0022] Figure 9 for Figure 8 side view. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1-9 As shown, an extrusion die for wide special-shaped copper busbars comprises: a diversion plate 1, a special-shaped die 2, and a sizing plate 3 arranged in sequence along the horizontal direction;

[0025] The diversion plate 1 includes two relatively arranged half-drainage plates 4. The two half-drainage plates 4 have the same structure and both include a first fixed plate 5, which is shaped to match the extrusion equipment, specifically a rectangular plate. Both ends of the first fixed plate 5 are connected (can be bonded) with an end plate 6, and the middle of the first fixed plate 5 is connected with a diverter plate 7, and the diverter plate 7 and the end plate 6 are located on the same side of the first fixed plate 5; specifically, the end plates 6 provided at both ends of the two half-drainage plates 4 are opposite, and the diverter plates 7 on the plate surfaces of the two half-drainage plates 4 are relatively arranged, that is, they are arranged in a mirror-symmetrical manner along the length direction, and a channel for diverting and draining the copper raw material to be extruded is formed between the two plates. One panel surface of the diverter plate 7 is tightly attached (can be bonded) to the middle of the plate surface on one side of the first fixed plate 5, and the diverter plate 7 is a triangular plate, specifically an obtuse triangular plate, preferably with a slope of 1:1.13-1.15 triangular plate, and the end plate 6 is a wedge plate;

[0026] The special-shaped die 2 includes a template 8, which is shaped to match the extrusion equipment, specifically a rectangular plate. The template 8 is provided with a die hole 9, the shape of which is designed according to the width of the extruded copper bar. The special-shaped die 2 can be composed of two detachable and combined half-piece special-shaped dies.

[0027] The sizing plate 3 includes a second fixed plate 10, which is a rectangular plate in shape and matches the extrusion equipment. The second fixed plate 10 is provided with a sizing hole 11. The shape of the sizing hole 11 is designed according to the structure of the special-shaped copper busbar and is used to regularize the size of the extruded copper busbar to ensure accuracy.

[0028] When in use, the diversion plate 1, the special-shaped die 2, and the sizing plate 3 are assembled in the end cover 12 of the extrusion chamber of the extruder in sequence from the outside to the inside along the horizontal direction (i.e., the operating side of the extruder), and then the end cover 12 is installed and positioned on the extrusion chamber 14 by fastening bolts 13, and the extruder is started to produce wide special-shaped copper bars.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the invention. It should be noted that for those skilled in the art, under the technical enlightenment provided by the present invention, other equivalent improvements can be made, all of which can achieve the purpose of the present invention and should be considered as the scope of protection of the present invention.

Claims

1. An extrusion die for wide special-shaped copper busbars, characterized in that: The extrusion mold includes: a diversion plate, a special-shaped mold, and a sizing plate arranged in sequence along the horizontal direction; the diversion plate includes two relatively arranged half-drainage plates, the half-drainage plate includes a first fixed plate, both ends of the first fixed plate are connected to the end plate, the middle of the first fixed plate is connected to the diversion plate, and the diversion plate and the end plate are located on the same side of the first fixed plate; the special-shaped mold includes a template, and the template is provided with a mold hole; the sizing plate includes a second fixed plate, and the second fixed plate is provided with a sizing hole; the end plates at both ends of the two half-drainage plates are opposite; one panel surface of the diversion plate is tightly attached to the middle of one side panel surface of the first fixed plate; the diversion plate is an obtuse-angled triangular plate; the diversion plate is a triangular plate with a slope of 1:1.13-1.15; the first fixed plate, the second fixed plate, and the template are all rectangular plates; the end plate is a wedge-shaped plate; the special-shaped mold is composed of two detachable and combined half-piece special-shaped molds.

Images