Strip straightening mechanism and extrusion device

Abstract

The utility model provides a strip straightening mechanism and an extrusion device. The strip straightening mechanism is communicated with a strip extrusion outlet of an extrusion device and comprises a base and a top cover. The top cover is arranged on one side of the base, a groove is formed in one of the top cover and the base, and the other one of the top cover and the base covers a groove opening of the groove to define a straightening channel. Or the top cover and the base are both provided with grooves, the top cover is arranged on the base in a covering mode, and the grooves of the top cover and the grooves of the base are aligned, so that the straightening channel is jointly defined through the two grooves; and the straightening channel is communicated with the strip extrusion outlet and is linearly arranged. Thus, the base and the top cover are arranged, the straightening channel is defined, it is ensured that the strip can flow along a linear path after being extruded out of the outlet, and therefore the lateral bending problem of the strip is effectively solved.

Description

Technical Field

[0001] This application relates to the technical field of metal processing, and particularly to a strip straightening mechanism and an extrusion device. Background Art

[0002] An extruder is the main equipment for the production of light alloy profiles, which is used to extrude a heated metal ingot into a shape and place the formed metal into a cooling water tank for rapid cooling and shaping. However, when the current extruder extrudes a strip, the strip often has the problem of side bending. The side-bent strip will affect the subsequent rolling and punching processes and reduce the yield rate. Summary of the Utility Model

[0003] In view of this, this application provides a strip straightening mechanism and an extrusion device to improve the problem of side bending of metal strips.

[0004] The technical solution adopted by this application to solve the above technical problems is as follows:

[0005] In a first aspect, an embodiment of this application provides a strip straightening mechanism. The strip straightening mechanism is communicated with the strip extrusion outlet of the extrusion device. The strip straightening mechanism includes:

[0006] A base;

[0007] A top cover provided on one side of the base;

[0008] Wherein, one of the top cover and the base is provided with a groove, and the other covers the notch of the groove to define the straightening channel; or

[0009] Both the top cover and the base are provided with grooves. The top cover covers the base and aligns the groove of the top cover with the groove of the base to jointly define the straightening channel through the two grooves;

[0010] The straightening channel is communicated with the strip extrusion outlet and is linearly arranged.

[0011] In some embodiments of this application, the base is provided with a groove, the notch of the groove faces the top cover, and the top cover covers the side of the base provided with the groove, so that the surface of the top cover facing the base and the groove define the straightening channel.

[0012] In some embodiments of this application, the base includes:

[0013] A bottom plate, which is arranged opposite to the top cover;

[0014] a first limiting member and a second limiting member, wherein the first limiting member and the second limiting member are both arranged on a side of the bottom plate facing the top cover and are respectively located on two sides of the bottom plate, and the first limiting member, the second limiting member and the bottom plate jointly define the groove;

[0015] Wherein, the top cover is disposed on the first limiting member and the second limiting member, so that the top cover closes the notch of the groove to form the straightening channel.

[0016] In some embodiments of the present application, the top cover includes a first top plate, which is arranged on the base and closes the notch of the groove to form the straightening channel. The first top plate is provided with at least one first air inlet hole, which is connected to the straightening channel for conveying nitrogen.

[0017] In some embodiments of the present application, the top cover also includes a second top plate, which is arranged on a side of the first top plate facing away from the base, and the second top plate is provided with at least one second air inlet hole, which is connected to the first air inlet hole.

[0018] In some embodiments of the present application, an air inlet groove is provided on a side of the first top plate facing away from the base, a plurality of first air inlet holes are provided and both ends of each of the first air inlet holes are respectively connected to the air inlet groove and the straightening channel, and the second air inlet hole passes through the second top plate and is connected to the air inlet groove.

[0019] In some embodiments of the present application, a plurality of first air inlet through-hole arrays are arranged, and the number of the second air inlet through-hole is one and is located at the center of an array formed by the plurality of first air inlet through-hole arrays.

[0020] In some embodiments of the present application, the diameter of the second air inlet hole is greater than the diameter of the first air inlet hole, the diameter of the second air inlet hole is smaller than the width of the slot of the air inlet groove, and the diameter of the second air inlet hole is smaller than the length of the slot of the air inlet groove.

[0021] In some embodiments of the present application, a plurality of track grooves are formed on the inner wall of the straightening channel, and the track grooves are extended along the linear direction of the straightening channel.

[0022] In a second aspect, an embodiment of the present application provides an extrusion device, comprising:

[0023] An extrusion die set is provided with an extrusion inner cavity for extruding metal materials;

[0024] An extrusion die pad is arranged at the outlet side of the extrusion die set and is provided with a connecting channel, wherein the connecting channel is communicated with the extrusion inner cavity;

[0025] The strip straightening mechanism as described in the first aspect is provided on the side of the extrusion die pad facing away from the extrusion module, and the straightening channel is communicated with the connection channel.

[0026] In summary, for the strip straightening mechanism and the extrusion device provided in the embodiments of the present application, by setting the base and the top cover and defining the straightening channel, it is ensured that the strip can flow along a linear path after the extrusion outlet, thereby effectively eliminating the side bending problem of the strip. Specifically, mainly by using the base and the top cover to define the straightening channel, which is communicated with the strip extrusion outlet of the extruder, so that when the extruder discharges the strip from the outlet, it can enter the straightening channel. The straightening channel is linearly arranged, so that the strip is forced to be kept in a predetermined position and direction in the straightening channel, avoiding the side bending of the strip caused by uneven material flow. Further, by effectively straightening the strip with the strip straightening mechanism, preventing the strip from side bending, effectively reducing the unqualified rate of the strip caused by shape deviation in subsequent processes, thereby significantly improving the overall yield. And the flatness of the strip is improved, which helps the smooth progress of subsequent rolling and punching processes, improving production efficiency and product quality. Description of the Drawings

[0027] Figure 1 Schematic diagram of an extrusion device provided by an embodiment of the present application;

[0028] Figure 2 Schematic diagram of a strip straightening mechanism provided by an embodiment of the present application;

[0029] Figure 3 Schematic diagram of the base in a strip straightening mechanism provided by an embodiment of the present application;

[0030] Figure 4 Schematic diagram of the top cover in a strip straightening mechanism provided by an embodiment of the present application.

[0031] Description of the Reference Numerals:

[0032] 100, extrusion device; 110, extrusion module; 120, extrusion die pad; 130, strip straightening mechanism; 131, base; 1311, groove; 1312, first limiting member; 1313, second limiting member; 1314, bottom plate; 132, top cover; 1321, first top plate; 13211, first air inlet through hole; 13212, air inlet groove; 1322, second top plate; 13221, second air inlet through hole; 133, straightening channel. Detailed Description of the Embodiments

[0033] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0034] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0035] In the present application, the term "exemplary" is used to mean "serving as an example, illustration, or explanation". Any embodiment described as "exemplary" in the present application is not necessarily to be construed as more preferred or advantageous than other embodiments.

[0036] Please refer to Figure 1 , an embodiment of the present application provides an extrusion device 100, including:

[0037] An extrusion module 110, provided with an extrusion cavity for extruding a metal material so that the metal material is basically formed into a predetermined shape.

[0038] An extrusion die pad 120, provided on the outlet side of the extrusion module 110 and provided with a connection channel. The connection channel is communicated with the extrusion cavity and is mainly used for receiving the metal material extruded from the extrusion module 110. In this embodiment, it is mainly used for receiving the metal strip extruded from the extrusion module 110. Wherein, the port at the end of the connection channel of the extrusion die pad 120 facing away from the extrusion module 110 is the strip extrusion outlet of the extrusion device 100.

[0039] A strip straightening mechanism 130, the strip straightening mechanism 130 is provided on the side of the extrusion die pad 120 facing away from the extrusion module 110, and the straightening channel 133 is communicated with the connection channel, that is, the straightening channel 133 in the strip straightening mechanism 130 is communicated with the strip extrusion outlet, and is used for receiving the strip after being extruded and formed by the extrusion module 110, and linearly correcting the strip to make the strip linear and improving the side bending of the strip caused by reasons such as friction.

[0040] Please refer to Figure 2 , the strip straightening mechanism 130 includes a base 131 and a top cover 132.

[0041] Wherein, the base 131 is the basic component of the strip straightening mechanism 130 and is located at the outlet of the connection channel of the extrusion die pad 120. The material of the base 131 can be selected as a high-strength metal material, which has good rigidity and wear resistance to withstand the pressure of the strip during the extrusion process.

[0042] The top cover 132 is provided on one side of the base 131 and defines a straightening channel 133 together with the base 131. The straightening channel 133 is connected to the strip extrusion outlet and is linearly arranged. The material of the top cover 132 is the same as that of the base 131 to ensure the stability and durability of the entire structure. The top cover 132 is installed on the base 131 through fixing parts to prevent displacement or detachment during the extrusion process. The fixing method between the top cover 132 and the base 131 is preferably a detachable connection, which is convenient for the later maintenance of the strip straightening structure, such as cleaning the straightening channel 133, etc. Specifically, the detachable connection includes but is not limited to snap connection, threaded connection, pin fixed connection, etc.

[0043] Among them, the straightening channel 133 is a linear channel jointly defined by the base 131 and the top cover 132 and is connected to the connection channel of the extrusion die pad 120. The inner wall of the straightening channel 133 is smooth to reduce the frictional resistance of the strip in the channel. The design size of the straightening channel 133 is optimized according to the specifications of the strip to ensure that the strip can pass through smoothly and maintain a straight state. After the strip is heated and extruded into shape in the extrusion module 110, it first enters the straightening channel 133 through the connection channel. Since the straightening channel 133 is linearly arranged, the strip is restricted on both sides when passing through the channel, and any lateral bending is corrected, so that the strip remains straight after extrusion.

[0044] In summary, in this application, by providing the base 131 and the top cover 132 and defining the straightening channel 133, it is ensured that the strip can flow along a linear path after the extrusion outlet, thereby effectively eliminating the side bending problem of the strip. Specifically, the straightening channel 133 is defined by the base 131 and the top cover 132, and the straightening channel 133 is connected to the strip extrusion outlet of the extruder, so that when the extruder discharges the strip from the outlet, it can enter the straightening channel 133. The straightening channel 133 is linearly arranged, so that the strip is forced to stay in a predetermined position and direction in the straightening channel 133, avoiding the side bending of the strip caused by uneven material flow. Further, by effectively straightening the strip using the strip straightening mechanism 130, the side bending of the strip is prevented, and the rejection rate of the strip caused by shape deviation in the subsequent processes is effectively reduced, thereby significantly improving the overall yield. And the straightness of the strip is improved, which helps the smooth progress of the subsequent rolling and stamping processes, improving production efficiency and product quality.

[0045] In some embodiments, please refer to Figure 2 and Figure 3, one of the top cover 132 and the base 131 is provided with a groove 1311, and the other of the top cover 132 and the base 131 is covered on the notch of the groove 1311 to define the straightening channel 133. The shape of the groove 1311 can be matched and set according to the specific shape and size of the strip, and the corresponding part for covering the groove 1311 is also set according to the specific shape and size of the strip. The first way is that the top cover 132 is provided with a groove 1311, and the base 131 is covered on the notch of the groove 1311 to define the straightening channel 133. The second way is that the base 131 is provided with a groove 1311, and the top cover 132 is covered on the notch of the groove 1311 to define the straightening channel 133.

[0046] Alternatively, in another embodiment, the top cover 132 and the base 131 are both provided with a groove 1311, the top cover 132 and the base 131 are fixedly connected, and the groove 1311 of the top cover 132 and the groove 1311 of the base 131 together form a straightening channel 133. It should be noted that the straightening channel 133 formed by any of the above three methods is a through channel structure in the linear direction, that is, the connecting channel can be connected through one end of the straightening channel 133, and the other end of the straightening channel 133 can be connected to the outside, so that the straightened strip can be discharged from the strip straightening mechanism 130.

[0047] In this example, see Figure 3 The base 131 is provided with a groove 1311, and the notch of the groove 1311 is arranged toward the top cover 132. The top cover 132 is arranged on the side of the base 131 provided with the groove 1311, so that the side of the top cover 132 facing the base 131 and the groove 1311 define a straightening channel 133. The covering method of the top cover 132 ensures that the notch of the groove 1311 is completely closed, and the strip is constrained in the up, down, left and right directions in the channel, ensuring that the strip is linear during the movement, and the part with side bending can be straightened by the inner wall of the straightening channel 133. The matching structure of the base 131 and the top cover 132 makes the formation of the straightening channel 133 more stable, and the covering method of the top cover 132 simplifies the installation and disassembly of the channel, and is convenient for cleaning and maintenance. During use, the operator can easily check the wear of the groove 1311 and the top cover 132, and perform necessary maintenance and replacement. The design of the groove 1311 in the base 131 can be adjusted according to strips of different specifications to meet the straightening needs of strips of various types and sizes. Whether it is a thick metal strip or a thinner strip, it can be straightened by adjusting the size and shape of the groove 1311.

[0048] In some embodiments, see Figure 3 The base 131 includes a bottom plate 1314 , a first limiting member 1312 and a second limiting member 1313 .

[0049] Among them, the bottom plate 1314 and the top cover 132 are oppositely arranged. The first limiting member 1312 and the second limiting member 1313 are arranged on one side of the bottom plate 1314 facing the top cover 132 and are respectively located on both sides of the bottom plate 1314. The first limiting member 1312, the second limiting member 1313 and the bottom plate 1314 jointly define a groove 1311.

[0050] Among them, the top cover 132 covers the first limiting member 1312 and the second limiting member 1313, so that the top cover 132 closes the notch of the groove 1311 to form a straightening channel 133.

[0051] After the strip is extruded and formed in the extrusion module 110, it enters the groove 1311 jointly defined by the bottom plate 1314, the first limiting member 1312 and the second limiting member 1313. Since the notch of the groove 1311 faces the top cover 132, the strip is restricted in the downward, leftward and rightward directions in the groove 1311. At the same time, the coverage of the top cover 132 provides an upward constraint, ensuring that the strip remains in a straight state when passing through the straightening channel 133 and eliminating the phenomenon of side bending. By jointly defining the groove 1311 by the bottom plate 1314, the first limiting member 1312 and the second limiting member 1313 and arranging it facing the top cover 132, the strip is subjected to multiple constraints in the up, down, left and right directions when passing through the straightening channel 133, ensuring the flatness of the strip.

[0052] It should be noted that the fixed connection relationships among the top cover 132, the bottom plate 1314, the first limiting member 1312 and the second limiting member 1313 are all detachable connections, which is beneficial to replacing different top covers 132, bottom plates 1314, first limiting members 1312 and second limiting members 1313 at any time according to actual needs, and is also beneficial to later maintenance. For example, according to the width of the strip, the width of the groove 1311 can be adjusted to adapt to the width dimension of the strip by adjusting the width of the bottom plate 1314 and the distance between the two limiting members; according to the thickness of the strip, the depth of the groove 1311 can be adjusted by adjusting the thickness of the two limiting members to adapt to the thickness of the strip. In this embodiment, the bottom plate 1314 and the two limiting members are detachably connected by pins, and the pins can also play a positioning role between the limiting members and the bottom plate 1314. The connection between the limiting member and the top cover 132 can also use pins or other connecting parts, such as bolts.

[0053] In some embodiments, please refer to Figure 2 and Figure 4The top cover 132 includes a first top plate 1321. The first top plate 1321 is covered on the base 131 and closes the notch of the groove 1311 to form the straightening channel 133. The first top plate 1321 is provided with at least one first air inlet hole 13211, which is connected to the straightening channel 133 and is used to transport nitrogen. Specifically, the first air inlet hole 13211 is connected to the external nitrogen transport, so that the nitrogen can enter the straightening channel 133 through the first air inlet hole 13211. The nitrogen can effectively squeeze the oxygen in the straightening channel 133, reduce the oxygen content in the straightening channel 133, and help prevent the oxidation of the strip.

[0054] It should be noted that the opening position and number of the first air inlet holes 13211 are designed according to actual needs to ensure that nitrogen can evenly enter the straightening channel 133. Nitrogen enters the straightening channel 133 through the first air inlet holes 13211, which can not only squeeze the oxygen in the straightening channel 133 to reduce the oxygen content, but also cover the surface of the strip to prevent oxidation of the strip when the strip passes through the straightening channel 133. The introduction of nitrogen can also play a role in uniformly cooling the strip during the straightening process, avoiding the internal stress of the strip due to uneven cooling, resulting in deformation or quality problems.

[0055] In some embodiments, the top cover 132 further includes a second top plate 1322, which is disposed on a side of the first top plate 1321 away from the base 131, and the second top plate 1322 is provided with at least one second air inlet hole 13221, which is connected to the first air inlet hole 13211. The first top plate 1321 and the second top plate 1322 are detachably connected, such as by bolts. The first air inlet hole 13211 and the second air inlet hole 13221 can be connected in a one-to-one correspondence manner, or part of the first air inlet hole 13211 can be connected to part of the second air inlet hole 13221, without specific limitation. Preferably, the first air inlet hole 13211 and the second air inlet hole 13221 are connected in a one-to-one correspondence, so as to increase the input amount and input rate of nitrogen as much as possible, accelerate the cooling of the strip entering the straightening channel 133, and reduce the risk of oxidation of the strip as much as possible.

[0056] In some embodiments, an air intake groove 13212 is formed on a surface of the first top plate 1321 facing away from the base 131. There are multiple first air intake through-holes 13211, and both ends of each first air intake through-hole 13211 are respectively communicated with the air intake groove 13212 and the straightening channel 133, so that the nitrogen gas entering the air intake groove 13212 can enter the straightening channel 133 through the multiple first air intake through-holes 13211. The second air intake through-hole 13221 penetrates through the second top plate 1322 and is communicated with the air intake groove 13212. In this embodiment, the number of the second air intake through-holes 13221 can be set to one or multiple, and the setting position of the second air intake through-hole 13221 does not need to be limited, as long as the second air intake through-hole 13221 can be communicated with the air intake groove 13212, effectively reducing the precision requirement for the opening position of the second air intake through-hole 13221. Moreover, if only one second air intake through-hole 13221 is provided, then only one pipeline for the nitrogen gas conveying device to convey nitrogen gas can be provided, which is convenient for the connection between the pipeline and the second air intake through-hole 13221.

[0057] Further, multiple first air intake channels are arranged in an array, and the number of the second air intake through-holes 13221 is one and is located at the center of the array formed by the array arrangement of the multiple first air intake through-holes 13211, which is beneficial to reducing the number of the second air intake through-holes 13221 and the number of the conveying pipelines connecting the second air intake through-holes 13221, thereby improving the connection efficiency between the air intake through-holes and the conveying pipelines. And because the second air intake through-hole 13221 is located at the center of the array, it is beneficial to make the nitrogen gas entering the air intake groove 13212 through the second air intake through-hole 13221 be distributed as evenly as possible in the air intake groove 13212 and enter the straightening channel 133 evenly through the first air intake through-holes 13211. The diameter of the second air intake through-hole 13221 can be the same as or different from the diameter of the first air intake through-hole 13211. Preferably, the diameter of the second air intake through-hole 13221 is larger than the diameter of the first air intake through-hole 13211 and smaller than the width and length of the notch of the air intake groove 13212, so that the flow area of the second air intake through-hole 13221 can cover the notch of the air intake groove 13212 as much as possible, increasing the nitrogen gas flow rate. In this embodiment, the number of the first air intake through-holes 13211 is set to 36, and the 36 first air intake through-holes 13211 are arranged in an array and are all communicated with the straightening channel 133 and the air intake groove 13212.

[0058] In some embodiments, a plurality of track grooves (not shown in the figures) are formed in the inner wall of the straightening channel 133, and the track grooves extend along the linear direction of the straightening channel 133. The inner wall of the straightening channel 133 includes a bottom plate 1314 facing the first top plate 1321 and used to form the surface of the straightening channel 133, a side surface of the first limiting member 1312 facing the second limiting member 1313, a side surface of the second limiting member 1313 facing the first limiting member 1312, and a first top plate 1321 facing the bottom plate 1314 and used to form the surface of the straightening channel 133. In other words, track grooves can be provided on the surfaces of the first limiting member 1312, the second limiting member 1313, the bottom plate 1314, and the first top plate 1321 that are respectively used to form the straightening channel 133. The straightening channel 133 with track grooves formed by the technical solution of this embodiment is mainly applicable to some strips whose surfaces need to be formed with grooves 1311, such as profiles. The straightening channel 133 with track grooves can not only ensure that the strip as a whole is in a linear shape, but also ensure as much as possible that the grooves 1311 on the strip or the protrusions on the strip are also in a linear shape.

[0059] This application uses specific terms to describe the embodiments of this application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be combined appropriately.

[0060] Similarly, it should be noted that, in order to simplify the expression of the disclosure of this application and thus help the understanding of one or more embodiments of the application, in the previous description of the embodiments of this application, sometimes multiple features are merged into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this application are more than those mentioned in the claims. In fact, the features of the embodiment are less than all the features of the single embodiment disclosed above.

Claims

1. A strip straightening mechanism, characterized in that, The strip straightening mechanism is connected to the strip extrusion outlet of the extrusion device, and the strip straightening mechanism comprises: Base; A top cover, arranged on one side of the base; Wherein, one of the top cover and the base is provided with a groove, and the other is provided to cover the notch of the groove to define a straightening channel; or The top cover and the base are both provided with grooves, the top cover is arranged on the base and the groove of the top cover is aligned with the groove of the base, so that the straightening channel is defined by the two grooves; The straightening channel is communicated with the strip extrusion outlet and is arranged linearly.

2. The strip straightening mechanism according to claim 1, characterized in that, The base is provided with a groove, the notch of the groove is arranged toward the top cover, and the top cover is arranged on the side of the base provided with the groove, so that the side of the top cover facing the base and the groove define the straightening channel.

3. The strip straightening mechanism according to claim 2, characterized in that, The base comprises: A bottom plate, arranged opposite to the top cover; a first limiting member and a second limiting member, wherein the first limiting member and the second limiting member are both arranged on a side of the bottom plate facing the top cover and are respectively located on two sides of the bottom plate, and the first limiting member, the second limiting member and the bottom plate jointly define the groove; Wherein, the top cover is disposed on the first limiting member and the second limiting member to close the notch of the groove to form the straightening channel.

4. The strip straightening mechanism according to claim 2, wherein The top cover includes a first top plate, which is arranged on the base and closes the notch of the groove to form the straightening channel. The first top plate is provided with at least one first air inlet hole, which is connected to the straightening channel for conveying nitrogen.

5. The strip straightening mechanism according to claim 4, wherein The top cover also includes a second top plate, which is arranged on a side of the first top plate away from the base, and the second top plate is provided with at least one second air inlet hole, which is connected to the first air inlet hole.

6. The strip straightening mechanism according to claim 5, characterized in that, An air inlet groove is provided on a side of the first top plate facing away from the base, a plurality of first air inlet holes are provided and both ends of each of the first air inlet holes are respectively connected to the air inlet groove and the straightening channel, and the second air inlet hole passes through the second top plate and is connected to the air inlet groove.

7. The strip straightening mechanism according to claim 6, wherein, A plurality of the first air inlet through-holes are arranged in an array, and the number of the second air inlet through-hole is one and is located at the center of an array formed by the plurality of the first air inlet through-holes.

8. The strip straightening mechanism according to claim 7, characterized in that, The diameter of the second air inlet through hole is greater than the diameter of the first air inlet through hole, the diameter of the second air inlet through hole is smaller than the width of the notch of the air inlet groove, and the diameter of the second air inlet through hole is smaller than the length of the notch of the air inlet groove.

9. The strip straightening mechanism according to any one of claims 1 to 8, characterized in that, The inner wall of the straightening channel is provided with a plurality of track grooves, and the track grooves are extended along the linear direction of the straightening channel.

10. An extrusion device, characterized in that, include: An extrusion die set is provided with an extrusion inner cavity for extruding metal materials; An extrusion die pad is arranged at the outlet side of the extrusion die set and is provided with a connecting channel, wherein the connecting channel is communicated with the extrusion inner cavity; The strip straightening mechanism according to any one of claims 1 to 9, wherein the strip straightening mechanism is arranged on a side of the extrusion die pad away from the extrusion die group, and the straightening channel is connected to the connecting channel.

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