A continuous extrusion device

Abstract

A continuous extrusion apparatus for extruding metal includes: an extrusion wheel with a groove on its outer circumferential surface; an extrusion body disposed on at least a portion of the outer edge of the extrusion wheel, the surface of the extrusion body facing the extrusion wheel and the groove forming a feed channel; an extrusion die having a forming hole of a target diameter, the extrusion die being installed inside the extrusion body, the extrusion body having a guide hole communicating with the feed channel and the forming hole; and an arch head disposed on the side of the extrusion body facing the extrusion wheel, the arch head closing one end of the feed channel facing the rotation direction of the extrusion wheel to guide the metal into the guide hole; wherein the arch head includes a mating portion extending into the groove, the mating portion having a chamfered structure on the side facing the extrusion wheel. Using the technical solution of this application, the internal structure of the continuous extrusion apparatus can be made more stable, and its service life can be improved.

Description

Technical Field

[0001] This invention relates to the field of extrusion molding technology, and more particularly to a continuous extrusion apparatus. Background Technology

[0002] The working principle of existing continuous extrusion equipment is based on achieving plastic deformation of metal through the high temperature and high pressure environment of the extrusion roller groove. During operation, the metal undergoes shearing and slippage at the end face of the arch head, and the top of the arch head scrapes the metal into the guide hole. After further high-temperature extrusion, the metal is formed into a product through the forming hole of the extrusion die.

[0003] However, in the extrusion process of existing continuous extrusion devices, gaps are easily generated at the joint surface between the arch head and the extrusion body. Metal materials are easily pressed into the gaps, which causes severe friction between the arch head and the extrusion wheel, directly leading to the scrapping of the extrusion wheel and seriously affecting the service life and production safety of the continuous extrusion device. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide an improved continuous extrusion device.

[0005] To address the aforementioned technical problems, this invention provides a continuous extrusion apparatus for extruding metal. The continuous extrusion apparatus includes: an extrusion wheel with a groove on its outer circumferential surface; an extrusion body disposed on at least a portion of the outer edge of the extrusion wheel, the surface of the extrusion body facing the extrusion wheel and the groove forming a feeding channel; an extrusion die with a forming hole of a target diameter, the extrusion die being installed inside the extrusion body, the extrusion body having a guide hole communicating with the feeding channel and the forming hole; and an arch head disposed on the side of the extrusion body facing the extrusion wheel, the arch head closing one end of the feeding channel in the direction of rotation of the extrusion wheel to guide the metal into the guide hole; wherein the arch head includes a mating portion extending into the groove, the mating portion having a chamfered structure on the side facing the extrusion wheel.

[0006] Optionally, the chamfered surface of the chamfered structure extends obliquely from the upper end face of the mating part, along the direction from the extrusion body to the extrusion wheel, and in the direction of rotation of the extrusion wheel.

[0007] Optionally, the arch head is detachably connected to the extrusion body, and the chamfered structure is adapted to provide a force-bearing surface so that the arch head is pressed against the extrusion body under the force of the force-bearing surface.

[0008] Optionally, the chamfered structure is formed by a cutting process.

[0009] Optionally, the included angle between the chamfered surface of the chamfered structure and the upper end face of the mating part is taken from [15°, 60°].

[0010] Optionally, the height of the chamfered structure is taken from [3, 15] mm.

[0011] Optionally, the arch head further includes: a connecting part connected to the extrusion body, wherein the extrusion body has an installation groove on the side facing the extrusion wheel for receiving the connecting part, and the end face of the connecting part facing the extrusion wheel is adapted to the outer edge of the extrusion wheel; a mating part is connected to the side of the connecting part facing the extrusion wheel, the outer peripheral surface of the mating part is in loose contact with the inner wall of the wheel groove, and the mating part slides along the wheel groove as the extrusion wheel rotates.

[0012] Optionally, there is a height difference between the upper end face of the mating part and the upper end face of the connecting part, wherein the upper end face of the connecting part is flush with the bottom wall of the guide hole, and the upper end face of the mating part is lower than the upper end face of the connecting part.

[0013] Optionally, the height difference between the upper end face of the mating part and the upper end face of the connecting part is taken from [2, 8] mm.

[0014] Optionally, the upper end face of the mating part and the upper end face of the connecting part are connected by an arc shape.

[0015] Optionally, the extrusion body includes a front cover and a rear cover that overlap each other, the front cover being closer to the extrusion roller than the rear cover, the extrusion die being clamped between the front cover and the rear cover, and the rear cover having a discharge hole communicating with the forming hole.

[0016] Optionally, the shape of the end face of the front cover facing the extrusion wheel is adapted to the outer edge shape of the extrusion wheel.

[0017] Optionally, a pad block is also included, disposed between the extrusion mold and the rear cover, the pad block having a connecting hole that connects the forming hole and the discharge hole.

[0018] Optionally, a metal pad is attached to the inner wall of the wheel groove, and the mating end and the metal pad are in a loose contact.

[0019] Optionally, the inner wall of the wheel groove is provided with multiple countersunk holes, and the metal pad layer includes multiple protrusions. The multiple countersunk holes and the multiple protrusions correspond one-to-one, and each of the protrusions is embedded in the corresponding countersunk hole.

[0020] Optionally, the continuous extrusion device further includes a pressure roller for pressing the metal into the extrusion groove.

[0021] Compared with the prior art, the technical solution of the embodiments of the present invention has the following beneficial effects:

[0022] The technical solution of this application involves forming a chamfered structure at the end of the arch head that extends into the wheel groove. When metal flows into the gap between the chamfered structure and the wheel groove as the extrusion wheel rotates, the pressure generated by the metal flow automatically presses the arch head against the extrusion body, allowing the arch head to be more tightly connected to the extrusion body. This dynamic clamping mechanism effectively solves the problem of decreased connection tightness between the arch head and the extrusion body in existing technologies. In particular, in existing technologies, the end of the arch head extending into the wheel groove is constantly impacted by metal, causing the end connecting the arch head to the extrusion body to be lifted, creating a gap at the connection. Metal then flows into the gap between the arch head and the extrusion body, further pushing the arch head towards the extrusion wheel until the arch head and the extrusion wheel collide, causing structural damage. This application utilizes the power of metal flow to achieve self-tightening of the arch head, avoiding the prying of the arch head and the formation of gaps at the joint surface caused by loosening, which could lead to excessive contact between the arch head and the extrusion wheel, resulting in damage to the extrusion wheel.

[0023] Furthermore, the arch head also includes a connecting part that connects to the extrusion body. The upper end face of the connecting part is higher than the end face of the mating part, and a stepped structure is formed between the connecting part and the mating part. The pressure generated by the metal during the extrusion process can also be applied to the stepped structure, thereby pushing the arch head towards the extrusion body, avoiding gaps between the arch head and the extrusion body, and making the connection between the arch head and the extrusion body tighter.

[0024] Furthermore, the inner wall of the wheel groove is provided with multiple countersunk holes to receive protrusions on the metal pad, thereby enabling the metal pad to be more firmly attached to the inner wall of the wheel groove. At the same time, the chamfered structure on the arch head can prevent the metal or metal oxide on the metal pad from being scratched, thus preventing impurities from being introduced into the extruded metal and improving the purity of the base metal. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a continuous extrusion device according to an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A magnified view of a portion of region A in the middle;

[0027] Figure 3 yes Figure 1 A schematic diagram of the extrusion body and the arch head;

[0028] Figure 4 yes Figure 1 The structure shown is a cross-sectional view along the BB direction;

[0029] Figure 5 yes Figure 4 A magnified view of a portion of region C in the middle;

[0030] Figure 6yes Figure 1 Schematic diagram of the extrusion roller;

[0031] Figure 7 yes Figure 1 A schematic diagram of the central arch material head. Detailed Implementation

[0032] As described in the background section, gaps are easily generated between the arch head and the extrusion body in the existing continuous extrusion device. After the metal flows in, it will cause the arch head and the extrusion wheel to collide, resulting in damage to the continuous extrusion device.

[0033] To address the aforementioned technical problems, this invention provides a continuous extrusion apparatus for extruding metal. The continuous extrusion apparatus includes: an extrusion wheel with a groove on its outer circumferential surface; an extrusion body disposed on at least a portion of the outer edge of the extrusion wheel, the surface of the extrusion body facing the extrusion wheel and the groove forming a feeding channel; an extrusion die with a forming hole of a target diameter, the extrusion die being installed inside the extrusion body, the extrusion body having a guide hole communicating with the feeding channel and the forming hole; and an arch head disposed on the side of the extrusion body facing the extrusion wheel, the arch head closing one end of the feeding channel in the direction of rotation of the extrusion wheel to guide the metal into the guide hole; wherein the arch head includes a mating portion extending into the groove, the mating portion having a chamfered structure on the side facing the extrusion wheel.

[0034] The technical solution of this application involves forming a chamfered structure at the end of the arch head that extends into the wheel groove. When metal flows into the gap between the chamfered structure and the wheel groove as the extrusion wheel rotates, the pressure generated by the metal flow automatically presses the arch head against the extrusion body, allowing the arch head to be more tightly connected to the extrusion body. This dynamic clamping mechanism effectively solves the problem of decreased connection tightness between the arch head and the extrusion body in existing technologies. In particular, in existing technologies, the end of the arch head extending into the wheel groove is constantly impacted by metal, causing the end connecting the arch head to the extrusion body to be lifted, creating a gap at the connection. Metal then flows into the gap between the arch head and the extrusion body, further pushing the arch head towards the extrusion wheel until the arch head and the extrusion wheel collide, causing structural damage. This application utilizes the power of metal flow to achieve self-tightening of the arch head, avoiding the prying of the arch head and the formation of gaps at the joint surface caused by loosening, which could lead to excessive contact between the arch head and the extrusion wheel, resulting in damage to the extrusion wheel.

[0035] To make the above-mentioned objectives, features and beneficial effects of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Figure 1 This is a schematic diagram of a continuous extrusion device 100 according to an embodiment of the present invention.

[0037] refer to Figure 1 The continuous extrusion device 100 includes: an extrusion wheel 1, with a groove 11 formed on its outer peripheral surface; an extrusion body 2, disposed on at least a portion of the outer edge of the extrusion wheel 1, the surface of the extrusion body 2 facing the extrusion wheel 1 and the groove 11 forming a feeding channel 10; an extrusion die 3, having a forming hole 31 with a target aperture, the extrusion die 3 being installed inside the extrusion body 2, the extrusion body 2 having a guide hole 21, the guide hole 21 connecting the feeding channel 10 and the forming hole 31; and an arch head 4, disposed on the side of the extrusion body 2 facing the extrusion wheel 1, the arch head 4 closing one end of the feeding channel 10 in the rotation direction D of the extrusion wheel 1 to guide the metal into the guide hole 21; wherein the arch head 4 includes a mating part 41 extending into the groove 11, the mating part 41 having a chamfered structure 40 on the side facing the extrusion wheel 1.

[0038] Specifically, the continuous extrusion device 100 can be used to extrude metal, extrude metal raw materials fed through the feed channel 10 into the desired shape. The metal can be, for example, copper or a copper alloy.

[0039] In specific application scenarios, during the metal extrusion process of the continuous extrusion device 100, the metal raw material (usually rod-shaped) is first embedded into the groove 11 of the extrusion wheel 1. At this time, the extrusion wheel 1 begins to rotate under the drive of the drive device, and the metal rotates along with the extrusion wheel 1, entering the feed channel 10 formed by the extrusion body 2 and the groove 11 of the extrusion wheel 1. During the rotation, the metal will encounter the extrusion chamber arch head 4 embedded in the groove 11. After the metal comes into contact with the arch head 4, due to the obstruction of the arch head 4, the metal accumulates and coarses at the arch head 4.

[0040] Furthermore, as the extrusion roller 1 continues to rotate, the thickened metal pile undergoes shear slip along the end face of the arch head 4. During this process, intense friction occurs between the metal and components such as the roller groove 11 and the arch head 4 of the extrusion roller 1. Simultaneously, the shear slip also causes significant deformation. These two effects together create a high-temperature and high-pressure environment. Under such conditions, the mobility of metal atoms increases, reaching a thermoplastic deformation state, thus acquiring the ability to change shape and structure under pressure.

[0041] Furthermore, the metal in a thermoplastic deformation state flows into the guide hole 21. As the raw material is continuously filled into the guide hole 21, the internal structure of the metal changes, and the grains are broken and refined by external force. Then, under the continuous pressure brought by the rotation of the extrusion roller 1 and the fluidity of the metal itself, the metal is extruded from the opening of the forming hole 31 of the extrusion die 3, finally completing the main process of continuous extrusion and obtaining a metal extrusion product that meets the requirements.

[0042] In some embodiments, the extrusion body 2 is disposed at at least a portion of the outer edge of the extrusion roller 1. For example, the extrusion body may be disposed adjacent to the outer edge of the extrusion roller 1, and the shape of the end face of the extrusion body 2 facing the extrusion roller 1 may be adapted to the shape of the outer edge of the extrusion roller 1. Furthermore, there is a non-zero micro-gap between the extrusion body 2 and the extrusion roller 1 to ensure that the extrusion roller 1 does not rub against the extrusion body 2 when rotating, and that metal does not overflow through the gap due to excessive gap size.

[0043] Furthermore, the surface of the extrusion body 2 facing the extrusion wheel 1 and the wheel groove 11 together form the feed channel 10. The metal gradually moves through the feed channel 10 to the arch head 4 and is entered into the guide hole 21.

[0044] In some embodiments, the extrusion die 3 is a key component that determines the final shape and size of the extruded product. The extrusion die 3 has a forming hole 31 with a target aperture, through which the metal is extruded. Furthermore, the extrusion body 2 is provided with a guide hole 21, which connects the feed channel 10 and the forming hole 31.

[0045] In some embodiments, the extending directions of the guide hole 21 and the forming hole 31 may be the same, or the central axis of the guide hole 21 and the central axis of the forming hole 31 may coincide. There may be a non-zero included angle between the extending directions of the guide hole 21 and the forming hole 31 and the extending direction of the feed channel 10.

[0046] In some embodiments, the non-zero included angle may be, for example, 60° to 90°.

[0047] Furthermore, the arch head 4 is positioned on the side of the extrusion body 2 facing the extrusion wheel 1, used to redirect the metal flow into the guide hole 21. The arch head 4 closes one end of the feed channel 10 in the direction of rotation D of the extrusion wheel 1. When the metal rotates with the extrusion wheel 1 and comes into contact with the arch head 4, it will accumulate and form a thick pile, and then undergo shearing and slippage along the end face of the arch head 4. During this process, intense friction occurs between the metal and components such as the wheel groove 11 of the extrusion wheel 1 and the arch head 4. At the same time, the shearing and slippage also brings about significant deformation. These two effects together generate a high temperature and high pressure environment, causing the raw material to reach a thermoplastic deformation state, thereby enabling it to flow smoothly into the guide hole 21.

[0048] Furthermore, the mating portion 41 of the arch head 4 extends into the wheel groove 11 to close one end of the feed channel 10 facing the rotation direction D of the extrusion wheel 1. Furthermore, the mating portion 41 has a chamfered structure 40 on the side facing the extrusion wheel 1. (See reference) Figure 2 During the metal extrusion process, as the metal flows into the gap between the chamfered structure 40 and the groove 11 as the extrusion roller 1 rotates, the pressure generated by the metal flow automatically presses the arch head 4 against the extrusion body 2. This dynamic pressing mechanism significantly improves the connection tightness between the arch head 4 and the extrusion body 2, effectively preventing metal from flowing into the gap between the arch head 4 and the extrusion body 2 due to loosening of the arch head 4, which could lead to misalignment of the arch head 4, causing severe friction with the extrusion roller 1 and rendering the extrusion roller 1 unusable.

[0049] In some embodiments, combined with Figure 1 , Figure 2 and Figure 7 The chamfered surface of the chamfered structure 40 extends obliquely from the upper end surface 411 of the mating part 41, along the direction from the extrusion body 2 to the extrusion wheel 1, and in the rotation direction D of the extrusion wheel 1.

[0050] Specifically, the upper end face refers to the end face of the mating part 41 facing the metal (or being impacted by the metal).

[0051] In some embodiments, reference Figures 1 to 3 The arch head 4 is detachably connected to the extrusion body 2, and the chamfered structure 40 is adapted to provide a force-bearing surface so that the arch head 4 is pressed against the extrusion body 2 under the force of the force-bearing surface.

[0052] Specifically, in the continuous metal extrusion process, the arch head 4 continuously rubs and interacts with the metal, inevitably leading to wear and deformation after prolonged use. The detachable connection allows operators to easily and quickly remove worn or damaged arch heads 4 from the extrusion body 2 and replace them with new, suitable arch heads 4, ensuring the entire continuous extrusion unit 100 remains in good working order and guaranteeing the stability of metal extrusion product quality and production efficiency. Furthermore, the detachable connection between the arch head 4 and the extrusion body 2 also allows for the replacement of different types or sizes of arch heads 4 according to different metal materials, extrusion process requirements, or product specifications, enhancing the versatility and flexibility of the unit.

[0053] Furthermore, the chamfered structure 40 provides a force-bearing surface (i.e., the inclined surface of the chamfered structure 40) that allows the arch head 4 to be pressed against the extrusion body 2 under the force of the force-bearing surface. Specifically, during the metal extrusion process, the metal flows (flow direction as shown in the figure). Figure 2When the middle arrow (as indicated) is applied, pressure is generated on the inclined surface of the chamfered structure 40. This inclined surface acts as a force-bearing surface, converting and transmitting the pressure generated by the metal flow. Since the inclined surface of the chamfered structure 40 extends obliquely from the upper end face 411 of the mating part 41, along the direction from the extrusion body 2 to the extrusion wheel 1 and in the rotation direction D of the extrusion wheel 1, the pressure generated by the metal flow will cause the arch head 4 to tend to move towards the extrusion body 2, thereby continuously pressing the arch head 4 against the extrusion body 2. Thus, it can effectively prevent metal from flowing into the gap between the arch head 4 and the extrusion body 2 due to loosening or displacement of the arch head 4. If metal flows into the gap, it will not only waste the metal raw material, but may also cause severe friction between the arch head 4 and the extrusion wheel 1, leading to accelerated wear on the surface of the extrusion wheel 1, or even damage to the extrusion wheel 1, affecting the normal operation and service life of the entire continuous extrusion device 100. On the other hand, the stable clamping action ensures that the metal is subjected to uniform and stable pressure during the extrusion process, which is conducive to the uniform plastic deformation of the metal in the feed channel 10 and guide hole 21, thereby improving the quality and consistency of the extruded products and ensuring that the produced metal extruded products meet the predetermined dimensional accuracy and performance requirements.

[0054] In some embodiments, the chamfered structure 40 can be formed by a cutting process.

[0055] In some embodiments, the included angle between the cutting surface of the chamfered structure 40 and the upper end face 411 of the mating part 41 is taken from [15°, 60°].

[0056] In some embodiments, the height of the chamfer structure is taken as [3, 15] mm. The height can, for example, refer to the dimension of the chamfer structure along the tangent direction of the contact point between the chamfer structure and the extrusion wheel, i.e., along... Figure 1 The dimensions in the vertical direction of the shown viewpoint.

[0057] In some embodiments, the arch head 4 may further include: a connecting part 42 connected to the extrusion body 2, wherein the extrusion body 2 has an installation groove 22 on the side facing the extrusion wheel 1 for receiving the connecting part 42, and the end face shape of the connecting part 42 facing the extrusion wheel 1 is adapted to the outer edge of the extrusion wheel 1; a mating part 41 is connected to the side of the connecting part 42 facing the extrusion wheel 1, wherein the outer peripheral surface of the mating part 41 is in partial contact with the inner wall of the wheel groove 11, and the mating part 41 slides along the wheel groove 11 as the extrusion wheel 1 rotates.

[0058] Specifically, the connecting part 42 of the arch head 4 is connected to the extrusion body 2, and the extrusion body 2 has an installation groove 22 on the side facing the extrusion wheel 1 to receive the connecting part 42. Thus, the arch head 4 can be stably installed on the extrusion body 2.

[0059] Furthermore, the end face shape of the connecting part 42 facing the extrusion roller 1 is adapted to the outer edge of the extrusion roller 1. This ensures a good fit between the connecting part 42 and the extrusion roller 1, reduces the possibility of metal leakage from the gap between the connecting part 42 and the extrusion roller 1 during the extrusion process, improves the utilization rate of metal, and avoids waste of raw materials.

[0060] Furthermore, combined with Figure 4 and Figure 5 The mating part 41 is connected to the side of the connecting part 42 facing the extrusion wheel 1, and the outer peripheral surface of the mating part 41 is in partial contact with the inner wall of the wheel groove 11. The shape of the mating part 41 is adapted to the shape of the wheel groove 11. Therefore, friction between the mating part 41 and the high-speed rotating extrusion wheel 1 can be avoided. At the same time, it can also ensure that the mating part 41 closes the end of the feed channel 10 facing the rotation direction D of the extrusion wheel 1, and the metal is diverted into the guide hole 21 under the blocking effect of the mating part 41.

[0061] In some embodiments, combined with Figures 1 to 3 as well as Figure 7 There is a height difference between the upper end face 411 of the mating part 41 and the upper end face 421 of the connecting part 42, wherein the upper end face 421 of the connecting part 42 is flush with the bottom wall of the guide hole 21, and the upper end face 411 of the mating part 41 is lower than the upper end face 421 of the connecting part 42.

[0062] Specifically, the upper end face 411 of the mating part 41 is lower than the upper end face 421 of the connecting part 42, so that a stepped structure is formed between the mating part 41 and the connecting part 42. As the metal flows, some of the metal will exert pressure on the stepped structure, thereby firmly pressing the arch head 4 against the extrusion body 2.

[0063] In some embodiments, the height difference between the upper end face 411 of the mating part 41 and the upper end face 421 of the connecting part 42 is taken as [2, 8] mm. This ensures that a stepped structure is formed between the mating part 41 and the connecting part 42, while also preventing an excessively large height difference between the upper end face 411 of the mating part 41 and the upper end face 421 of the connecting part 42 from hindering metal flow.

[0064] In some embodiments, the upper end face 411 of the mating portion 41 and the upper end face 421 of the connecting portion 42 are connected by an arc-shaped transition. This allows the metal to continue flowing through the guide hole 21.

[0065] In some embodiments, the extrusion body 2 includes a front cover 201 and a rear cover 202 that overlap each other. The front cover 201 is closer to the extrusion roller 1 than the rear cover 202. The extrusion die 3 is clamped between the front cover 201 and the rear cover 202. The rear cover 202 has a discharge hole 23 that communicates with the forming hole 31. Thus, the modular design makes the assembly and disassembly of the continuous extrusion device 100 more convenient, facilitating the repair and maintenance of the internal components of the continuous extrusion device 100.

[0066] In some embodiments, the shape of the end face of the front cover 201 facing the extrusion roller 1 is adapted to the outer edge shape of the extrusion roller 1. Thus, the end face of the front cover 201 facing the extrusion roller 1 and the roller groove 11 together form at least a portion of the feed channel 10.

[0067] In some embodiments, combined with Figure 1 and Figure 4 The continuous extrusion device 100 may further include: a pad 5, which is disposed between the extrusion mold 3 and the rear cover 202. The pad 5 has a connecting hole 51, which connects the forming hole 31 and the discharge hole 23.

[0068] In practical applications, the pad 5 can be made of elastic material and is in a highly compressed state when it is installed between the extrusion die 3 and the rear cover 202. The compressed pad 5 can continuously push the extrusion die 3 to the front cover 201, ensuring that the extrusion die 3 will not shift when the metal flows into the forming hole 31, thus improving the stability of the internal structure of the continuous extrusion device 100.

[0069] In some embodiments, continue to refer to Figure 1 , Figure 4 and Figure 5 A metal pad 6 is attached to the inner wall of the wheel groove 11, and the mating part 41 and the metal pad 6 are in partial contact. As a result, the metal pad 6 can generate sufficient friction to drive the metal in the wheel groove 11 to rotate with the extrusion wheel 1.

[0070] In some embodiments, the metal pad 6 may be, for example, copper.

[0071] In some embodiments, combined with Figure 1 , Figure 5 and Figure 6 The inner wall of the wheel groove 11 has multiple countersunk holes 111, and the metal pad 6 includes multiple protrusions 61. The multiple countersunk holes 111 and the multiple protrusions 61 correspond one-to-one, with each protrusion 61 embedded in the corresponding countersunk hole 111. Thus, the metal pad 6 can be firmly attached to the inner wall of the wheel groove, preventing it from loosening after aging and being scraped into the metal by the extrusion head 4, which would cause metal contamination during extrusion and affect the yield.

[0072] In some embodiments, continue to refer to Figure 1 The continuous extrusion device 100 may further include a pressure roller 7, which is used to press the metal into the roller groove 11.

[0073] Therefore, by adopting the technical solution of this application, a chamfered structure 40 is formed at the end of the mating part 41 of the arch head 4 extending into the wheel groove 11. When metal flows into the gap between the chamfered structure 40 and the wheel groove 11 as the extrusion wheel 1 rotates, the pressure generated by the metal flow will automatically press the arch head 4 against the extrusion body 2, so that the arch head 4 can be more tightly connected to the extrusion body 2. Thus, this dynamic pressing mechanism effectively solves the problem of decreased connection tightness between the arch head and the extrusion body in the prior art. In particular, in the prior art, when the end of the arch head extending into the wheel groove is constantly impacted by metal, causing the end of the arch head connected to the extrusion body to be lifted and a gap to be formed at the connection, metal will flow into the gap between the arch head and the extrusion body, further pushing the arch head towards the extrusion wheel until the arch head and the extrusion wheel collide, causing structural damage. This application utilizes the power of metal flow to achieve self-tightening of the arch head 4, avoiding the prying of the arch head 4 and the generation of gaps at the joint surface caused by loosening, which would lead to excessive contact between the arch head 4 and the extrusion roller 1 and damage to the extrusion roller 1.

[0074] Furthermore, the arch head 4 also includes a connecting part 42 connected to the extrusion body 2. The upper end face 421 of the connecting part 42 is higher than the end face of the mating part 41. A stepped structure is formed between the connecting part 42 and the mating part 41. The pressure generated by the metal during the extrusion process can also be applied to the stepped structure, thereby pushing the arch head 4 towards the extrusion body 2, avoiding gaps between the arch head 4 and the extrusion body 2, and making the connection between the arch head 4 and the extrusion body 2 tighter.

[0075] Furthermore, the inner wall of the wheel groove 11 is provided with multiple countersunk holes 111 for receiving the protrusions 61 on the metal pad 6, thereby enabling the metal pad 6 to be more firmly connected to the inner wall of the wheel groove 11. At the same time, the chamfered structure 40 on the arch head 4 can also prevent the metal or metal oxide on the metal pad 6 from being scratched, causing impurities to be mixed into the extruded metal, thus improving the purity of the base metal.

[0076] It should be understood that the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document indicates that the preceding and following related objects are in an "or" relationship. As used herein, unless explicitly stated otherwise, the term "or" covers all possible combinations unless impractical. For example, if a component is declared to include A or B, then unless explicitly stated otherwise or impractical, the component can include A, or B, or A and B. As a second example, if a component is declared to include A, B, or C, then unless explicitly stated otherwise or impractical, the component can include A, or B, or C, or A and B, or A and C, or B and C, or A and B and C. In the embodiments of this application, "multiple" refers to two or more.

[0077] Relational terms appearing in the embodiments of this application, such as "first," "second," etc., are used only to distinguish an entity or operation from another entity or operation, without requiring or implying any actual relationship or order between these entities or operations. Furthermore, the words "comprising," "having," and "including," and other similar forms, are intended to be equivalent in meaning and are open-ended; one or more items following any of these words do not imply an exhaustive list of such items or that they are limited to only the listed items. Exemplary embodiments have been disclosed in the drawings and specification. However, many variations and modifications can be made to these embodiments. Therefore, although specific terminology is used, it is used only in a general and descriptive sense and not for limiting purposes.

[0078] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A continuous extrusion apparatus for extruding metal, characterized in that, include: An extrusion wheel, wherein a groove is formed on the outer circumferential surface of the extrusion wheel; An extrusion body is disposed on at least a portion of the outer edge of the extrusion wheel, and the surface of the extrusion body facing the extrusion wheel and the wheel groove together form a feeding channel; An extrusion die having a forming hole of a target diameter is installed inside the extrusion body, the extrusion body having a guide hole that connects the feed channel and the forming hole; An arched head is positioned on the side of the extrusion body facing the extrusion wheel. The arched head closes one end of the feed channel in the direction of rotation of the extrusion wheel, guiding the metal into the guide hole. The arch head includes a mating part that extends into the wheel groove, and the mating part has a chamfered structure on the side facing the extrusion wheel; The arch head also includes a connecting part, which is connected to the extrusion body. The upper end face of the mating part is lower than the upper end face of the connecting part, so that a stepped structure is formed between the mating part and the connecting part. The height difference between the upper end face of the mating part and the upper end face of the connecting part is taken from [2, 8] mm; and / or the upper end face of the mating part and the upper end face of the connecting part are connected by an arc shape.

2. The continuous extrusion apparatus according to claim 1, characterized in that, The chamfered surface of the chamfered structure extends obliquely from the upper end face of the mating part, along the direction from the extrusion body to the extrusion wheel, and in the direction of rotation of the extrusion wheel.

3. The continuous extrusion apparatus according to claim 1, characterized in that, The arch head is detachably connected to the extrusion body, and the chamfered structure is adapted to provide a force-bearing surface so that the arch head is pressed against the extrusion body under the force of the force-bearing surface.

4. The continuous extrusion apparatus according to claim 1, characterized in that, The chamfered structure is formed by a cutting process; and / or The included angle between the chamfered surface of the chamfered structure and the upper end face of the mating part is taken from [15°, 60°]; and / or The height of the chamfered structure is taken from [3, 15] mm.

5. The continuous extrusion apparatus according to claim 1, characterized in that, The extrusion body has an installation groove on the side facing the extrusion wheel for receiving the connecting part, and the shape of the end face of the connecting part facing the extrusion wheel is adapted to the outer edge of the extrusion wheel; The mating part is connected to the side of the connecting part facing the extrusion wheel. The outer peripheral surface of the mating part is in loose contact with the inner wall of the wheel groove. As the extrusion wheel rotates, the mating part slides along the wheel groove.

6. The continuous extrusion apparatus according to claim 1, characterized in that, The extrusion body includes a front cover and a rear cover that overlap each other. The front cover is closer to the extrusion roller than the rear cover. The extrusion die is clamped between the front cover and the rear cover. The rear cover has a discharge hole that communicates with the forming hole.

7. The continuous extrusion apparatus according to claim 6, characterized in that, The shape of the end face of the front cover facing the extrusion wheel is adapted to the outer edge shape of the extrusion wheel.

8. The continuous extrusion apparatus according to claim 6, characterized in that, It also includes a pad block disposed between the extrusion mold and the rear cover, the pad block having a connecting hole that connects the forming hole and the discharge hole.

9. The continuous extrusion apparatus according to claim 1, characterized in that, The inner wall of the wheel groove is fitted with a metal pad, and the mating part and the metal pad are in loose contact.

10. The continuous extrusion apparatus according to claim 9, characterized in that, The inner wall of the wheel groove is provided with multiple countersunk holes, and the metal pad layer includes multiple protrusions. The multiple countersunk holes and the multiple protrusions correspond one-to-one, and each of the protrusions is embedded in the corresponding countersunk hole.

11. The continuous extrusion apparatus according to claim 1, characterized in that, It also includes a pressure roller for pressing the metal into the groove.

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