KR102587150B1 - Wide width type metal extruder capable of controlling flowability of metal ingot - Google Patents

Abstract

Disclosed is a wide metal extruder capable of controlling the flowability of a metal ingot, which improves the flowability of a metal ingot by applying a flow guide having a multi-stage step structure, thereby improving the thickness deviation of a metal foil.
A wide metal extruder capable of controlling the flowability of a metal ingot according to the present invention includes an extruder having a container for accommodating a metal ingot therein, and a feeder for extruding the metal ingot accommodated in the container and discharging the metal ingot; and a mold unit coupled to the extrusion unit to manufacture a metal foil by molding the metal ingot extruded from the extrusion unit into a foil shape. The mold unit is coupled to the extrusion unit and includes a feeder of the extrusion unit. A flow guide for controlling the flow of metal ingots supplied from; A forming die coupled to the flow guide and forming a metal ingot passing through the flow guide into a foil shape to manufacture a metal foil; and a holder mounted on the outside of the molding die to secure the flow guide and the molding die to the extrusion portion, wherein the flow guide includes at least one device whose height decreases in the direction from the extrusion portion to the molding die. It is characterized by having a flow guide hole with a multi-stage structure having a step difference.

Description

Wide metal extruder capable of controlling the flowability of metal ingots {WIDE WIDTH TYPE METAL EXTRUDER CAPABLE OF CONTROLLING FLOWABILITY OF METAL INGOT}

The present invention relates to a wide metal extruder capable of controlling the flowability of a metal ingot, and more specifically, to improving the flowability of the metal ingot by applying a flow guide with a multi-stage step structure, thereby improving the thickness deviation of the metal foil. This relates to a wide metal extruder capable of controlling the flowability of a metal ingot.

Metal foil is widely used in various industrial products such as liquid crystal displays, mobile phones, and printed sheets. Such metal foils include metal foils such as electrolytic copper foil or lithium foil, which are thin, long, continuous, and easily bendable, or polyester foil, and most metal foil products are produced in roll form.

Generally, a metal extruder produces a metal foil by extruding a metal ingot contained in an extrusion unit into a foil shape by molding it through a mold unit. The metal foil extruded through this metal extruder is guided by a guide roller, etc., and is then finally wound by a winding roller to produce a roll-shaped product.

Figure 1 is a cross-sectional view showing a conventional metal extruder, which will be described in more detail with reference to this.

As shown in FIG. 1, the conventional metal extruder 1 is largely divided into an extrusion unit 20 and a mold unit 40.

At this time, the extrusion unit 20 of the metal extruder 1 includes a container 22 for accommodating the metal ingot (T) in a molten state, and is mounted on one side of the container 22 to store the metal ingot (T) in the container 22. ) includes a pressurizing piston 24 for pressurizing and extruding.

The mold unit 40 is coupled to the extrusion unit 20 and includes a forming die 45 for manufacturing a metal foil by forming the metal ingot (T) passing through the extrusion unit 20 into a foil shape.

The conventional metal extruder 1 having the above-described configuration discharges the metal ingot T in the container 22 to the feeder 26 by pressurizing the pressurizing piston 24 of the extruder 20, and then discharges the metal ingot T in the container 22 to the feeder 26. A metal foil is manufactured by forming it into a foil shape through the forming die 44 of (40).

However, the conventional metal extruder 1 is a method in which the metal ingot T in the container 22 is directly discharged to the forming die 44 of the mold unit 40 through the feeder 260, so the metal ingot T It was impossible to control the flow.

For this reason, when a metal foil is manufactured using a conventional metal extruder (1), the thickness deviation in the width direction of the metal foil is excessive, and the edges on both sides are severely wrinkled, causing wrinkles, which results in the quality of the metal foil. There was difficulty in improving.

Related prior literature includes Korean Patent Publication No. 10-2018-0089491 (published on August 8, 2018), which discloses an extruder, a tube extruder, or a metal extrusion press.

The purpose of the present invention is to provide a wide metal extruder capable of controlling the flowability of a metal ingot by improving the flowability of the metal ingot by applying a flow guide having a multi-stage step structure, thereby improving the thickness deviation of the metal foil.

In order to achieve the above object, a wide metal extruder capable of controlling the flowability of a metal ingot according to an embodiment of the present invention includes a container for accommodating a metal ingot therein, and extruding the metal ingot contained in the container to discharge the metal ingot. An extrusion unit provided with a feeder for: and a mold unit coupled to the extrusion unit to manufacture a metal foil by molding the metal ingot extruded from the extrusion unit into a foil shape. The mold unit is coupled to the extrusion unit and includes a feeder of the extrusion unit. A flow guide for controlling the flow of metal ingots supplied from; A forming die coupled to the flow guide and forming a metal ingot passing through the flow guide into a foil shape to manufacture a metal foil; and a holder mounted on the outside of the molding die to secure the flow guide and the molding die to the extrusion portion, wherein the flow guide includes at least one device whose height decreases in the direction from the extrusion portion to the molding die. It is characterized by having a flow guide hole of a multi-stage structure with a step difference.

The flow guide includes a flow guide body; and a flow guide hole formed to penetrate the central portion of the flow guide body to supply the metal ingot extruded from the feeder of the extrusion unit to the forming die.

The flow guide hole includes: a first flow guide hole formed at a position adjacent to the feeder of the extruder; and a second flow guide hole protruding from the first flow guide hole in the direction of the forming die.

The first flow guide hole has a first height, and the second flow guide hole has a second height that is lower than the first height.

The first height is preferably 6 to 10 mm, and the second height is preferably 3 to 5 mm.

The first flow guide hole has a concave structure in which the height of the central portion in the width direction is lower than that of the edge portion, based on the width direction intersecting the height direction.

The first flow guide hole having the concave structure has a curved round portion at an edge in the width direction.

The wide metal extruder capable of controlling the flowability of a metal ingot according to the present invention improves the flowability of the metal ingot by applying a flow guide having a multi-stage step structure, thereby improving the thickness deviation of the metal foil.

As a result, when manufacturing metal foil using the wide metal extruder capable of controlling the flowability of the metal ingot according to the present invention, which has a flow guide with a multi-stage stepped structure, almost no speed deviation occurs in each width direction. As a result, the thickness deviation in the width direction of the metal foil is improved, which reduces weeping and minimizes the occurrence of wrinkles.

In addition, the wide metal extruder capable of controlling the flow of the metal ingot according to the present invention can minimize the occurrence of wrinkles by improving the thickness deviation by applying a flow guide with a multi-stage stepped structure, so it can be used for a wide width of 100 mm or more and a width of 120 ㎛ or less. It also becomes possible to produce a metal foil having a thin shape.

1 is a cross-sectional view showing a conventional metal extruder.
Figure 2 is a cross-sectional view showing a wide metal extruder capable of controlling the flowability of a metal ingot according to an embodiment of the present invention.
Figure 3 is an exploded perspective view showing a wide metal extruder capable of controlling the flowability of a metal ingot according to an embodiment of the present invention.
Figure 4 is an enlarged view of the flow guide of Figure 2.
Figure 5 is a schematic diagram illustrating the extrusion process of a wide metal extruder capable of controlling the flowability of a metal ingot according to an embodiment of the present invention.
Figure 6 is a cross-sectional view for explaining the flow guides of Comparative Examples 1 to 4.
Figure 7 is a graph showing the speed measurement results in each width direction of the metal foil manufactured using the metal extruder according to Comparative Examples 1 to 4.
Figure 8 is an actual photograph showing the mold part of Comparative Example 2.
Figure 9 is an actual photograph showing the extrusion results of a metal foil manufactured using a metal extruder according to Comparative Example 2.
Figure 10 is a cross-sectional view for explaining the flow guide of Examples 1 to 3.
Figure 11 is a graph showing the speed measurement results in each width direction of the metal foil manufactured using the metal extruder according to Examples 1 to 3.
Figure 12 is a measured photograph showing the mold part of Example 3.
Figure 13 is a measured photograph showing the extrusion results of the metal foil manufactured using the metal extruder according to Examples 1 to 3.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. The present embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is provided. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, a wide metal extruder capable of controlling the flowability of a metal ingot according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

Figure 2 is a cross-sectional view showing a wide-type metal extruder capable of controlling the flowability of a metal ingot according to an embodiment of the present invention, and Figure 3 is a wide-type metal extruder capable of controlling the flowability of a metal ingot according to an embodiment of the present invention. This is an exploded perspective view. In addition, Figure 4 is an enlarged cross-sectional view showing the flow guide of Figure 2, and Figure 5 is a schematic diagram for explaining the extrusion process of a wide metal extruder capable of controlling the flow of a metal ingot according to an embodiment of the present invention.

As shown in FIGS. 2 to 5 , the wide metal extruder 100 capable of controlling the flow of a metal ingot according to an embodiment of the present invention includes an extrusion unit 120 and a mold unit 140.

The extrusion unit 120 includes a container 122 for accommodating a molten metal ingot (T) inside, and a feeder for extruding the metal ingot (T) contained in the container 122 and discharging the metal ingot (T). (126) is provided.

In addition, the extrusion unit 120 is mounted on one side of the container 122 and further includes a pressurizing piston (not shown) for pressurizing and extruding the metal ingot T in the container 122. This extrusion unit 120 discharges the pressurized metal ingot (T) into the mold unit 140 through the feeder 126 by a pressurizing piston that pressurizes and extrudes the metal ingot (T) contained therein at a predetermined pressure. do.

The mold unit 140 is coupled to the extrusion unit 120 and is installed to manufacture a metal foil by molding the metal ingot (T) extruded from the extrusion unit 120 into a foil shape.

Here, lithium, aluminum, copper, etc. may be used as the metal ingot (T) that can be extruded from the extrusion unit 120 and formed into a foil shape through the mold unit 140, and among these, lithium is preferably used. However, it is not limited to this.

Although not shown in detail in the drawings, the metal foil extruded to the outside through the mold unit 140 is transferred in one direction by a transfer unit (not shown). This transfer unit may include at least one guide roller for guiding the metal foil so that it can be wound while maintaining a predetermined tension by rotating in contact with the extruded metal foil.

At this time, the metal ingot (T) is preferably supplied to the mold unit 140 at an injection speed of 10 to 400 mm/sec, and a more preferable range may be 20 to 350 mm/sec.

In particular, the mold unit 140 of the present invention uses a flow guide 142 having a multi-stage structure to control the flow of the metal ingot (T) extruded from the extrusion unit 120. Accordingly, the present invention can improve the flowability of the metal ingot (T) and improve the thickness deviation of the metal foil.

For this purpose, the mold unit 140 of the present invention includes a flow guide 142, a molding die 144, and a holder 146.

The flow guide 142 is coupled to the extrusion unit 120 and serves to control the flow of the metal ingot (T) supplied from the feeder 126 of the extrusion unit 120.

The forming die 144 is coupled to the flow guide 142 and is mounted to form the metal ingot (T) passing through the flow guide 142 into a foil shape. This forming die 144 controls the final thickness and width of the metal ingot (T) passing through the flow guide 142 to manufacture a metal foil formed in a foil shape.

The holder 146 is mounted on the outside of the forming die 144 and serves to fix the flow guide 142 and the forming die 144 to the extrusion unit 120. At this time, the holder 146, the forming die 144, and the flow guide 142 may be fixed to the extrusion unit 120 through a fastening member. A screw screw may be used as a fastening member, but is not limited thereto.

In the above-mentioned FIG. 4, (a) shows a surface cut along the metal ingot transfer direction (X), and (b) shows a surface cut along the width direction (Y) intersecting the metal ingot transfer direction (X). It represents.

As shown in Figures 3 and 4 (a) and (b), the flow guide 142 of the present invention has at least one step whose height decreases in the direction from the extrusion part 120 to the forming die 140. It is provided with a flow guide hole 145 having a multi-stage structure.

To this end, the flow guide 142 of the present invention includes a flow guide body 143 and a flow guide hole 145.

The flow guide body 143 is coupled to the extrusion unit 120 and contacts the portion of the extrusion unit 120 excluding the feeder 126.

The flow guide hole 145 is formed to penetrate the central part of the flow guide body 143 to supply the metal ingot (T) extruded from the feeder 126 of the extruder 120 to the forming die 144. It is installed.

The flow guide hole 145 has a multi-level step structure with at least one step whose height decreases in the direction from the feeder 126 of the extruder 120 to the molding die 144.

More specifically, the flow guide hole 145 is a first flow guide hole 145a formed at a position adjacent to the feeder 126 of the extruder 120, and a direction from the first flow guide hole 145a toward the molding die 144. It includes a second flow guide hole 145b protruding.

Here, the first flow guide hole 145a has a first height H1, and the second flow guide hole 145b has a second height H2 that is lower than the first height H1. More preferably, the first height (H1) is 6 to 10 mm, and the second height (H2) is 3 to 5 mm.

In addition, the length L1 of the first flow guide hole 145a preferably has a first length, and the length of the second flow guide hole preferably has a second length shorter than the first length. At this time, the length L1 of the first flow guide hole 145a may be 5 to 30 mm, and the length L2 of the second flow guide hole 145b may be 1 to 15 mm.

This first flow guide hole 145a is based on the width direction (Y) intersecting the extrusion direction (X) of the metal ingot (T), and the height (H1) of the central portion in the width direction (Y) is in the width direction ( It has a concave structure lower than the height (H3) of the edge of Y).

The first flow guide hole 145a may be formed in an inversed taper shape whose height gradually increases from the center to the edge in the width direction (Y). Accordingly, the height H1 of the central portion in the width direction (Y) of the first flow guide hole 145a may have a minimum value, and the height H3 of the edge portion in the width direction (Y) may have a maximum value. there is.

The first flow guide hole 145a having this concave structure has a curved round portion (R) at an edge portion in the width direction (Y). At this time, the round part (R) preferably has a radius of curvature of 5 to 6R.

In addition, the height H2 of the second flow guide hole 145b in the width direction (Y) may be the same at both the center portion and the edge portion.

As such, the present invention applies a flow guide 142 with a multi-level step structure in which the height and length of the first and second flow guide holes 145a and 145b are optimized. Accordingly, the metal ingot (T) is primarily extruded through the feeder 126 of the extruder 120 into the first flow guide hole 145a, and then secondarily communicates with the first flow guide hole 145a. It is possible to uniformly control the speed of the center portion and the edge portion in the width direction (Y) of the metal ingot (T) that passes through the second flow guide hole (145b) and is supplied to the forming die (144).

As a result, the wide metal extruder 100 capable of controlling the flow of a metal ingot according to an embodiment of the present invention applies the flow guide 142 of a multi-stage stepped structure to the feeder 126 of the extrusion unit 120. Since it is possible to control the flowability of the metal ingot (T) extruded through, it is possible to manufacture a metal foil having a width of 100 mm or more and a thinness of 120 ㎛ or less.

As in the present invention, when manufacturing a metal foil using a metal extruder 100 equipped with a flow guide 142 of a multi-stage stepped structure, the speed in the width direction (Y) according to the height of the flow guide hole 145 It was confirmed through experiments that almost no deviation occurred.

Therefore, as in the present invention, when manufacturing a metal foil using the metal extruder 100 equipped with a flow guide 142 of a multi-stage stepped structure, almost no speed deviation occurs in the width direction (Y), so that the metal foil The thickness deviation in the width direction (Y) is improved, reducing the wrinkling of the edges on both sides, thereby minimizing the occurrence of wrinkles.

As seen so far, the wide metal extruder capable of controlling the flowability of a metal ingot according to an embodiment of the present invention improves the flowability of the metal ingot by applying a flow guide with a multi-stage step structure, thereby reducing the thickness of the metal foil. Deviations can be improved.

As a result, the wide metal extruder capable of controlling the flowability of the metal ingot according to the embodiment of the present invention has a speed deviation in each width direction when manufacturing metal foil using a metal extruder equipped with a flow guide with a multi-stage stepped structure. Since almost no occurrence occurs, the thickness deviation in the width direction of the metal foil is improved, which reduces weeping and minimizes the occurrence of wrinkles.

In addition, the wide metal extruder capable of controlling the flow of a metal ingot according to an embodiment of the present invention can minimize the occurrence of wrinkles by improving the thickness deviation by applying a flow guide with a multi-stage stepped structure, so it can be used with a wide width of 100 mm or more and a width of 120 mm. It also becomes possible to manufacture metal foil with a thickness of ㎛ or less.

Example

Hereinafter, the configuration and operation of the present invention will be described in more detail through preferred embodiments of the present invention. However, this is presented as a preferred example of the present invention and should not be construed as limiting the present invention in any way.

Any information not described here can be technically inferred by anyone skilled in the art, so description thereof will be omitted.

Table 1 shows the speed measurement results in each width direction of the metal foil manufactured using the metal extruder according to Comparative Examples 1 to 4. In addition, Figure 6 is a cross-sectional view for explaining the flow guide of Comparative Examples 1 to 4, and Figure 7 is a graph showing the speed measurement results in each width direction of the metal foil manufactured using the metal extruder according to Comparative Examples 1 to 4. .

[Table 1]

As shown in Table 1 and FIGS. 6 and 7, the flow guide 242 of the metal extruder according to Comparative Examples 1 to 4 is configured to penetrate the flow guide body 243 and the central portion of the flow guide body 243. It includes a formed flow guide hole 245. At this time, metal foils were manufactured by injecting and extruding metal ingots into the flow guide holes of Comparative Examples 1 to 4 under the conditions shown in Table 1 without any steps.

The flow guide hole 245 was formed to penetrate the central portion of the flow guide body 243 without steps, and a metal foil was manufactured by injecting and extruding a metal ingot under the conditions shown in Table 1. At this time, the flow guide hole 245 was formed in a reverse taper shape in which the height (H1) of the central portion in the width direction (Y) was lower than the height (H2) of the edge portion in the width direction (Y).

In the case of the metal foil manufactured using the metal extruder according to Comparative Examples 1 to 4, it can be confirmed that a significant speed deviation in the width direction (Y) occurred depending on the height of the flow guide hole 245.

Figure 8 is a measured photograph showing the mold part of Comparative Example 2, and Figure 9 is a measured photograph showing the extrusion results of the metal foil manufactured using the metal extruder according to Comparative Example 2.

As shown in Figures 8 and 9, in the case of a metal foil manufactured using a metal extruder having a mold unit according to Comparative Example 2, a significant speed deviation in the width direction occurs, resulting in the thickness of the metal foil in the width direction. It can be seen that the edges on both sides are severely dented and wrinkled due to excessive deviation.

Table 2 shows the speed measurement results in each width direction of the metal foil manufactured using the metal extruder according to Examples 1 to 3. In addition, Figure 10 is a cross-sectional view for explaining the flow guide of Examples 1 to 3, and Figure 11 is a graph showing the speed measurement results in each width direction of the metal foil manufactured using the metal extruder according to Examples 1 to 3. .

[Table 2]

As shown in Table 2, Figures 10 and 11, the flow guide 142 of the metal extruder according to Examples 1 to 3 is configured to penetrate the flow guide body 143 and the central portion of the flow guide body 143. It is formed and includes a flow guide hole 145 of a multi-stage structure having a first flow guide hole 145a and a second flow guide hole 145b. At this time, the first flow guide hole 145a of Examples 1 to 3 has a concave step structure in which the height (H1) of the central portion in the width direction (Y) is lower than the height (H3) of the edge portion in the width direction (Y). A metal foil was manufactured by injecting and extruding a metal ingot under the conditions shown in Table 2.

In the case of the metal foil manufactured using the metal extruder according to Examples 1 to 3, it can be seen that almost no speed deviation occurs in the width direction (Y) depending on the height and length of the flow guide hole 145.

In addition, Figure 12 is a measured photograph showing the mold part of Example 3, and Figure 13 is a measured photograph showing the extrusion results of the metal foil manufactured using the metal extruder according to Examples 1 to 3. At this time, (a) of Figure 13 shows Example 1, (b) shows Example 2, and (c) shows Example 3.

As shown in Figures 12 and 13, in the case of the metal foil manufactured using the metal extruder according to Examples 1 to 3, almost no speed deviation in the width direction occurs, so the thickness deviation in the width direction of the metal foil is small. It can be seen that the improvement has resulted in a reduction in the wrinkling of the edges on both sides, minimizing the creation of wrinkles.

Although the above description focuses on the embodiments of the present invention, various changes or modifications can be made at the level of a person skilled in the art in the technical field to which the present invention pertains. These changes and modifications can be said to belong to the present invention as long as they do not depart from the scope of the technical idea provided by the present invention. Therefore, the scope of rights of the present invention should be determined by the claims described below.

100: wide metal extruder 120: extrusion unit
122: Container 124: Feeder
140: Mold part 142: Flow guide
143: Flow guide body 144: Forming die
145: flow guide hole 145a: first flow guide hole
145b: second flow guide hole 146: holder

Claims (7)

An extrusion unit including a container for accommodating a metal ingot therein, and a feeder for extruding the metal ingot accommodated in the container and discharging the metal ingot; and
A mold unit coupled to the extrusion unit to manufacture a metal foil by molding the metal ingot extruded from the extrusion unit into a foil shape,
The mold unit includes a flow guide coupled to the extrusion unit to control the flow of the metal ingot supplied from the feeder of the extrusion unit; A forming die coupled to the flow guide and forming a metal ingot passing through the flow guide into a foil shape to manufacture a metal foil; And a holder mounted on the outside of the molding die to fix the flow guide and the molding die to the extrusion unit.
The flow guide has a flow guide hole with a multi-stage structure having at least one step whose height decreases in the direction from the extrusion unit to the molding die,
The flow guide hole may include: a first flow guide hole formed adjacent to the feeder of the extrusion unit; And a second flow guide hole protruding from the first flow guide hole in the direction of the forming die,
The first flow guide hole has a concave structure in which the height of the central portion in the width direction is lower than that of the edge portion, based on the width direction intersecting the extrusion direction of the metal ingot. It is formed in an inversed taper shape where the height gradually increases from the central part in the width direction to the edge,
The first flow guide hole of the concave structure has a curved round portion at an edge in the width direction, the round portion is disposed on the same line at the center of the thickness of the first flow guide hole, and the round portion has a curvature of 5 to 6R. A wide metal extruder capable of controlling the flowability of a metal ingot, characterized by having a radius.
According to paragraph 1,
The flow guide is
Flow guide body; and
The flow guide hole is formed to penetrate the central portion of the flow guide body to supply the metal ingot extruded from the feeder of the extrusion unit to the forming die;
A wide metal extruder capable of controlling the flowability of a metal ingot, comprising a.
delete According to paragraph 1,
The first flow guide hole has a first height,
The second flow guide hole is a wide metal extruder capable of controlling the flow of a metal ingot, characterized in that the second height is lower than the first height.
According to paragraph 4,
The first height is 6 to 10 mm,
A wide metal extruder capable of controlling the flowability of a metal ingot, wherein the second height is 3 to 5 mm. delete delete

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