MACHINES D’EXTRUSION CONTINUE

Abstract

The present invention relates to a continuous extrusion machine, and comprises a frame, and an extrusion wheel, a compacting wheel assembly, a chamber and a die which are mounted on the frame. Annular projections are oppositely arranged on both sides of an open end of an annular groove of the extrusion wheel. A projection space is formed between the annular projections. A surface, close to the extrusion wheel, of the chamber is provided with a chamber boss. A surface, close to the extrusion wheel, of the die is provided with a die boss in smooth contact with the chamber boss. The chamber boss and the die boss can enter the projection space. A groove space is formed between the annular projection and a side wall of the annular groove, the groove space can contain an extruded rod adhered to an inner wall of the groove space. [Fig. 6]

Description

Title of the invention: CONTINUOUS EXTRUSION MACHINES Technical field

[0001] The present disclosure relates to the technical field of continuous extrusion, in particular a continuous extrusion machine. Technological background

[0002] Continuous extrusion refers to a rotating extrusion wheel having a groove. Feed rods are driven to advance through the friction between the groove and the rod. When the rod is in contact with a stop block, the billet enters a chamber through an introduction hole of the chamber and is extruded into various required products through a die mounted in the chamber. Because the extrusion wheel is rotating and the chamber is fixed, a certain gap is formed between a chamber cambered surface and an extrusion wheel surface. Due to the existence of the gap, extrusion of the rod from the gap is certainly caused, and a burr is formed.

[0003] The burr is made of waste materials generated during the continuous extrusion process, and the material utilization rate can be improved by reducing the amount of burr. A key technology of continuous extrusion is how to control the amount of burr. The burr sealing of a traditional continuous extrusion machine is realized through a radial gap mi between the extrusion wheel and the chamber cambered surface, as shown in [Fig.l].

[0004] First, the variation of rotating radial eccentricity of the extrusion wheel directly affects the variation of the radial gap mi between the extrusion wheel and the chamber cambered surface. Second, the difference in frictional heat quantity of the extrusion wheel at different rotational speeds leads to the difference in thermal expansion of the extrusion wheel, so that the radial gap mi between the extrusion wheel and the chamber cambered surface changes considerably at different rotational speeds of the extrusion wheel.

[0005] For the above two reasons, the radial gap mi between the extrusion wheel and the chamber cambered surface should not be too small during the continuous extrusion process. If the radial gap mi between the extrusion wheel and the chamber cambered surface is too small, a large amount of wear between the extrusion wheel and the chamber is caused during the extrusion process, and the result is that the extrusion wheel and the chamber are damaged due to the wear. On the contrary, if the radial gap mi between the extrusion wheel and the chamber cambered surface is too large, a large amount of wear between the extrusion wheel and the chamber cambered surface is caused during the extrusion process, and the result is that the extrusion wheel and the chamber are damaged due to the wear. amount of material burr is caused, and the material utilization rate is reduced.

[0006] US Patent US4054048 discloses a rotary metal extrusion device. A boss side surface and a groove side face of the extrusion wheel are used to seal the burr. However, since the groove side face is uniform from top to bottom, the method is only suitable for continuous extrusion of soft metals such as aluminum. For extrusion of materials with slightly higher strength such as copper, the friction condition between the billets and the groove cannot be established, and the extrusion process is impossible. Summary of the Invention

[0007] The present disclosure aims to provide a continuous extrusion machine to solve the problems of the prior art. The friction force between the rod and an annular groove of an extrusion wheel can be improved, so as to ensure the billet extrusion process.

[0008] In order to achieve the purpose, the present disclosure provides the following scheme.

[0009] The present disclosure provides a continuous extrusion machine. The continuous extrusion machine comprises a frame, and an extrusion wheel, a compacting wheel assembly, a chamber, and a die which are mounted on the frame. An annular groove is formed in the extrusion wheel. Annular projections extending along an axial direction of the extrusion wheel are oppositely arranged on both sides of an open end of the annular groove. A projection space is formed between the annular projections on both sides. A surface, close to the extrusion wheel, of the chamber is provided with a chamber boss. A die is mounted in the chamber boss. A surface, close to the extrusion wheel, of the die is provided with a die boss in smooth contact with the chamber boss. Both the chamber boss and the die boss can enter the projection space.A groove space is formed between the annular projection and a side wall of the annular groove. The groove space may contain an extruded rod, and the extruded rod is bonded to an inner wall of the groove space.

[0010] Preferably, an introduction-guide plate is also provided at an upper flow of the chamber. A surface, close to the extrusion wheel, of the introduction-guide plate is provided with an introduction boss. The introduction boss is brought into smooth contact with the chamber boss. The introduction boss, the chamber boss and the die boss together form a boss body mated with the extrusion wheel.

[0011] Preferably, the side surfaces on both sides of the boss body are boss side surfaces. The opposite side surfaces of the annular projections on both sides are protrusion side surfaces. A gap value in a vertical direction between the respective boss side surfaces and protrusion side surfaces is δ, and δ is 0.001 mm to 0.2 mm.

[0012] The distance between the protruding side surfaces and the side wall of the open end of the annular groove is w, and w is greater than or equal to 0.6 mm.

[0013] In the direction from a stop block end face to the guide-introduction plate, the length value of the boss body is L, and in the range of L which is 30 mm or less, H is 3.5 mm or more, and n is H or more. Here, H is a vertical distance from a boss surface of the boss body to a wheel surface of the extrusion wheel, and H is the same or different at different circumference angular positions of the extrusion wheel (at different length positions of the boss body), and n is a height of the protrusion side surface.

[0014] Preferably, the surface, near the extrusion wheel, of the boss body is a boss surface, and the boss surface is an arc surface, or the boss surface is a smooth combination of an arc surface, a plane and a curved surface. The boss body is integrally formed with the chamber, or the chamber boss, the insertion boss and the die boss are independently arranged and respectively formed on the chamber, the insertion-guide plate and the die.

[0015] Preferably, the boss body is formed in one piece with the die.

[0016] Preferably, the surface, close to the extrusion wheel, of the chamber is a chamber surface. The surface, close to the extrusion wheel, of the feed-guide plate is an feed-guide plate surface. A flash discharge channel is formed between the chamber surface, the feed-guide plate surface and the wheel surface of the extrusion wheel.

[0017] Preferably, the chamber surface and the insertion-guide plate surface are both provided with inclined faces, the inclined faces are directly connected to the boss side surfaces, and the burr discharge channel is formed between the inclined faces and the wheel surface of the extrusion wheel; or, the inclined faces are connected to the boss side surfaces via arcuate cambered surfaces, respectively, and the burr discharge channel is formed among the inclined faces, the arcuate cambered surfaces and the wheel surface of the extrusion wheel.

[0018] In this case, when the inclined faces are connected to the boss side surfaces through the arcuate cambered surfaces, respectively, the vertical distance between the wheel surface of the extrusion wheel and the arcuate cambered surfaces is m, and m is greater than or equal to 0.8 mm.

[0019] Preferably, the die is mounted on a shoe. The shoe is mounted on the frame. A product discharge hole is formed in the shoe and penetrates therethrough. The product discharge hole communicates with a plurality of die holes of the die. A die cooling water hole is also formed in the shoe.

[0020] The die cooling water hole and / or the product discharge hole may introduce a cooling medium into a product outlet end face of the die.

[0021] Preferably, a plurality of die holes are formed in the die.

[0022] Preferably, the shoe is rotatably mounted on the chassis by means of a shoe pivot, and the shoe is connected to an oil cylinder. The oil cylinder can drive the shoe to rotate. A locking device is also rotatably mounted on the frame, and the locking device can lock the shoe.

[0023] Compared with the prior art, the present disclosure has the following technical effects.

[0024] The annular projections are oppositely arranged on both sides of the open end of the annular groove. The groove space is formed between the annular projections and a side wall of the annular groove. The groove space can contain an extruded rod, and the extruded rod is bonded to an inner wall of the groove space, so that the friction force between the rod and the annular groove of the extrusion wheel can be improved, and the billet extrusion process is ensured. Brief description of the figures

[0025] To more clearly illustrate the present embodiment of the present disclosure or the technical diagram in the prior art, the following briefly presents the attached figures to be used in the present embodiment. Obviously, the attached figures in the following description only show some embodiments of the present disclosure, and the person skilled in the art can still deduce other drawings from these attached figures without creative efforts.

[0026] [Fig-1] is a flash sealing diagram of a traditional continuous extrusion of the prior art.

[0027] [Fig.2] is a sectional view of a continuous extrusion machine along a line central part of an annular groove of an extrusion wheel according to an embodiment of the present disclosure.

[0028] [Fig.3] is a sectional view of [Fig.2] taken along a line AA (one base is omitted).

[0029] [Fig.4] is a partially enlarged view of [Fig.2] (showing only parts of an introduction-guide plate, a chamber, a die, a chamber cover, a pressure plate, an extrusion wheel and a shoe).

[0030] [Fig.5] is a sectional view of [Fig.4] taken along a line BB (not showing only parts of an extrusion wheel and an introduction-guide plate).

[0031] [Fig.6] is a sectional view of [Fig.4] taken along a line CC (not showing than an extrusion wheel, a die, a chamber and a chamber cover).

[0032] [Fig.7] is a sectional view of [Fig.4] taken along a line CC (a surface chamber is formed by a combination of an arched cambered surface and an inclined face).

[0033] In [Fig. 1], mB radial space between the extrusion wheel and the chamber cambered surface; 101, extrusion wheel; 102, die; 103, chamber; and 104, chamber cover.

[0034] In [Fig.2] to [Fig.7], 1, extrusion wheel; 2, chamber; 3, boss surface; 4, die; 5, annular groove; 6, wheel surface; 7, end face of stop block; 8, stop block; 9, boss body; 10, projection side surface; 11, boss side surface; 12, main shaft; 13, main shaft bearing; 14, bearing seat; 15, chassis; 16, base; 17, insertion-guide plate; 18, shoe; 19, shoe pivot; 20, chamber cover; 21, compression means; 22, compression means shaft; 23, oil cylinder; 24, compacting wheel assembly; 25, scraper assembly; 26, cooling water hole; 27, pressure plate; 28, arcuate cambered surface; 29, die hole; 30, rounded corner at groove edge of extrusion wheel; 31, die surface; 32, die side surface; 33, product outlet end face; 34, die cooling water hole; 35, product discharge hole; 36, inclined face; 37, burr discharge channel; and 38, groove space;

[0035] H, vertical distance from the boss surface of the boss body to the wheel surface of the extrusion wheel;

[0036] ô, space value in the vertical direction between the boss side surface and the projection side surface;

[0037] m, vertical distance from the wheel surface of the extrusion wheel to the arched cambered surface;

[0038] L, length value of the boss body in a direction from the end face of the stop block to the insertion-guide plate;

[0039] w, distance between the protruding side surface and the open end side wall of the annular groove; and

[0040] n, height of the lateral projection surface. Detailed description of the invention

[0041] The following clearly and completely describes the technical scheme in the present embodiments of the present disclosure with reference to the appended figures in the present embodiments of the present disclosure. Obviously, the described embodiments are only a part rather than all of the present embodiments of the present disclosure. Based on the embodiment in the present disclosure, all other embodiments obtained by ordinary technical personnel in the art without contribution to creative work belong to the scope protected by the present disclosure.

[0042] The present disclosure aims to provide a continuous extrusion machine in order to solve the problems of the prior art. The friction force between the rod and an annular groove of an extrusion wheel can be improved, and the billet extrusion process is ensured.

[0043] To make the foregoing objective, features and advantages of the present disclosure more clear and understandable, the present disclosure is described in detail below with reference to the accompanying figures and specific embodiments. Examples

[0044] As shown in [Fig.2] to [Fig.7], the embodiment provides a continuous extrusion machine. The continuous extrusion machine mainly comprises a frame 15, and an extrusion wheel 1, a compacting wheel assembly 24, a chamber 2 and a die 4 which are mounted on the frame 15. The extrusion wheel 1 is rotatably mounted on the frame 15 via a main shaft 12. More specifically, the extrusion wheel 1 is mounted on the main shaft 12. Main shaft bearings 13 are provided on both sides of the main shaft 12 for support. The main shaft bearing 13 is mounted in a bearing seat 14. The bearing seat 14 is mounted on the frame 15. The frame 15 is mounted on a base 16. An annular groove 5 is formed in an outer circumferential surface of the extrusion wheel 1.The compacting wheel assembly 24 is used to press the rod into the annular groove 5 of the extrusion wheel 1 to cause initial friction between the rod and the annular groove 5. A stop block 8 is provided at the lower flow of the die 4 (on the side opposite to the compacting wheel assembly 24). The stop block 8 can block the rod in the annular groove 5, so that the rod enters the die 4. In this case, it should be noted that the above-mentioned structure is a mature prior art in the art and is not described in detail in the embodiment.

[0045] In this embodiment, annular projections extending along the extrusion wheel 1 are arranged oppositely on both sides of an open end of the annular groove 5. A projection space is formed between the annular projections on both sides. A surface, close to the extrusion wheel 1, of the chamber 2 is provided with a chamber boss. A die 4 is mounted in a mounting hole formed in a position close to the stop block 8 on the boss surface of the chamber (the surface close to the extrusion wheel 1). A surface, close to the extrusion wheel 1, of the die 4 is provided with a die boss in smooth contact with the chamber boss. Both the chamber boss and the die boss can enter the projection space. A groove space 38 is formed between the annular projections and a side wall of the annular groove 5.The groove space 38 can contain an extruded rod, and the extruded rod is bonded to an inner wall of the groove space 38, so that the friction force between the rod and the annular groove 5 of the extrusion wheel 1 can be improved, and the billet extrusion process is ensured.

[0046] In the embodiment, as shown in [Fig. 4], the chamber 2 is mounted in a shoe 18 and fixed by a chamber cover 20. An introduction-guide plate 17 is also provided at the upper flow of the chamber 2 (the end close to the compacting wheel assembly). A surface, close to the extrusion wheel 1, of the introduction-guide plate 17 is also provided with an introduction boss of the same width as the chamber boss. The chamber boss, the introduction boss and the die boss together form a boss body 9. A pressure plate 27 is provided at an upper end of the introduction-guide plate 17. The introduction-guide plate 17 and the chamber 2 are fixed to the shoe 18 via the pressure plate 27.

[0047] The shoe 18 is rotatably mounted on the frame 15 via a shoe pivot 19. The shoe 18 can be rotated about the shoe pivot 19. Both ends of the shoe pivot 19 are mounted on the frame 15. Compression means 21 are also provided on the frame 15. When the shoe 18 is operating, the shoe 18 is positioned and locked on the frame 15 by the compression means 21. Here, the compression means 21 are rotatably mounted on the frame via a compression means shaft 22. The compression means 21 can be rotated about the compression means shaft 22 to achieve opening or compression of the shoe 18. Both ends of the compression means shaft 22 are mounted on the frame 15. In the embodiment, the compression means 21 can be selected according to specific working requirements.For example, the compression means 21 may be a compression block, and a compression block may be driven to rotate around . of the compression means shaft 22 by a hydraulic cylinder to realize the opening or compression of the shoe block 18. In addition, the shoe 18 is connected to an oil cylinder 23. The oil cylinder 23 causes the shoe 18 to open or close. One end of the oil cylinder 23 is rotatably connected to the shoe 18, and the other end of the oil cylinder 23 is rotatably connected to the base 16.

[0048] In the embodiment, the main shaft bearing 13 is preferably a cylindrical roller bearing, so that a main shaft system can be easily moved on the main shaft bearing 13, and the boss body 9 and the stop block 8 can be automatically aligned with the annular groove 5.

[0049] In the embodiment, a cooling water hole 26 is formed in the extrusion wheel 1 and used to introduce cooling water to cool the extrusion wheel 1, so that the amount of thermal expansion of the extrusion wheel 1 is reduced, and wear caused by direct contact between the protrusion side surfaces 10 of the extrusion wheel 1 and the boss side surfaces 11 due to thermal expansion is avoided.

[0050] In this embodiment, a scraper assembly 25 is also mounted on the frame 15, and the scraper assembly 25 is used to remove the burr from the wheel surface 6 (outer round surface) of the extrusion wheel 1. More specifically, as shown in [Fig.2], the scraper assembly 25 mainly comprises a scraper and a scraper driver. The scraper driver can drive the scraper to move closer to or further from the extrusion wheel 1. When the scraper moves closer to the extrusion wheel 1, the scraper can remove the burr from the wheel surface 6 of the extrusion wheel 1. In this case, the scraper driver can be selected according to needs, such as a hydraulic rod or a linear motor.

[0051] In the embodiment, as shown in [Fig.5] to [Fig.6], the distance between the protrusion side surfaces 10 and a side wall of an open end of the annular groove 5 (the protrusion height of the annular protrusions along the axial direction of the extrusion wheel 1) is w, and the value of w is not less than 0.6 mm. A gap value in the vertical direction between the boss side surfaces 11 and the respective protrusion side surface 10 is δ, and δ is 0.001 mm to 0.2 mm.The circular radius of the boss surface 3 (the surface close to the extrusion wheel 1) is not less than the minimum circular radius of the projection side surfaces 10, that is, the height n of the projection side surfaces 10 (the height along the radial direction of the extrusion wheel 1) is not less than the vertical distance h from the boss surface of the boss body 9 to the wheel surface 6 of the extrusion wheel, and the gap value δ in the vertical direction between the boss side surfaces 11 and the projection side surfaces 10 must be kept the same. even on both sides as much as possible, so that it is ensured that the burr generated on both sides is balanced in the production process and the amount of burr in the extrusion process is kept to a minimum.

[0052] In the embodiment, the gap between the protrusion side surface 10 and the protrusion side surface 11 is used for sealing an extrusion material, so that the gap between the boss side surface 11 and the protrusion side surface 10 can be set to be very small, the burr is greatly reduced, the material utilization rate is improved, the problem of size change of the small-section product caused by the periodic fluctuation of the burr caused by the radial eccentricity of the extrusion wheel 1 and the fluctuation of the linear speed of extrusion of the product is solved, and the dimensional accuracy level of the product is improved. In addition, the die 4 is mounted near the bottom of the annular groove 5 to the greatest extent, so that the friction force on a billet flow channel is reduced to the greatest extent, and the extrusion load is reduced.

[0053] In the embodiment, when a material such as copper that is not bonded to the extrusion wheel 1 is extruded, harmful friction between the wheel surface 6 and the extruded rod is greatly reduced, the amount of heat is reduced, the temperature of the extrusion wheel 1 is reduced while saving energy, and the service life of the extrusion wheel 1 is prolonged.

[0054] In the embodiment, in the direction from an end face of the stop block 7 to the insertion-guide plate 17, the length value L of the boss body 9 is not more than 30 mm. The vertical distance H between a boss surface of the boss body 9 and a wheel surface 6 of the extrusion wheel is not less than 3.5 mm, preferably 5 to 8 mm. In order to increase the sealing effect of the burr, the radius of a rounded corner at a groove edge of the extrusion wheel 30 (an edge fillet at the end, away from the annular groove, of the annular projection) is generally 0.1 to 0.5 mm.

[0055] In the embodiment, as shown in [Fig.7], the end, away from the extrusion wheel 1, of the boss side surface 11 is connected to a burr discharge channel 37. More specifically, the burr discharge channel 37 may be formed in combination with the arcuate cambered surfaces 28 and the inclined faces 36, and may also be formed by inclined faces 36 directly. The outward expansion angles [3 of the inclined faces 36 are not less than 3°, thereby facilitating the smooth discharge of the burr. The vertical distance m between the wheel surface 6 and the arcuate cambered surfaces 28 is not less than 0.8 mm, and by adopting a larger value m, the smooth discharge of the burr results, thereby reducing the temperature of the extrusion wheel 1 and prolonging the service life of the extrusion wheel 1. In the embodiment, the arcuate cambered surfaces 28 are provided to facilitate detection of a mounting position after mounting the chamber 2 in the shoe 18. When detection can be completed without the arcuate cambered surfaces 28, the arcuate cambered surfaces 28 can be omitted and the flash discharge channel 37 can be formed by inclined surfaces 36.

[0056] In the embodiment, when a die mounting groove penetrating along the axis direction of the main shaft is formed in the boss body 9 of the chamber 2, a die 4 is mounted in the die mounting groove, and the width of the die 4 is equal to the width of the boss body 9. At this time, the die 4 is a component of the boss body 9, and the die surface 31 and the boss surface 3 are basically in smooth contact, and the die side surface 32 and the boss side surface 11 must be brought into smooth contact.

[0057] In the embodiment, one die hole 29 may be formed in the die 4, or two or more die holes 29 may be formed in the die 4. Preferably, in the two-hole mode, two products are extruded at the same time.

[0058] In the embodiment, the boss body 9 may be arranged on the insertion-guide plate 17 and the chamber 2 in sections, or the insertion-guide plate 17 and the chamber 2 may be arranged as an integral part, and the boss body 9 is also an integral part. Furthermore, a surface, near the extrusion wheel 1, of the boss body 9 is a boss surface 3, and the boss surface 3 may be an arc surface, or a combination of an arc surface, a plane, and a curved surface.

[0059] In the embodiment, the stop block 8 may be an independent part incorporated into the chamber 2 or an integral part integrated into the chamber 2.

[0060] In the embodiment, the value H of the vertical distance between the boss surface of the boss body 9 and the wheel surface 6 of the extrusion wheel is preferably larger when it is closer to the stop side, and can be kept substantially unchanged.

[0061] In the embodiment, in order to reduce the temperature of the die and prolong the service life of the die, a cooling medium is introduced through an end face of the product outlet 33 of the die 4 when a product with a small cross-sectional area is extruded. More specifically, a die cooling water hole 34 is formed in the chamber 2, the die cooling water hole 34 is provided near the end face of the product outlet 33 of the die 4, and the cooling medium may be separately provided through the die cooling water hole 34 in the chamber 2. Alternatively, the cooling medium may be introduced through a product discharge hole 35, in which one end of the product discharge hole 35 communicates with a product outlet of die 4, and the other end enters the chamber cover and the shoe for product discharge.

[0062] In the embodiment, the cooling medium is preferably provided separately through the die cooling water hole 34 in the chamber 2.

[0063] Specific examples are used to illustrate the principles and methods of implementing the present disclosure. The description of the embodiments mentioned above is used to help illustrate the method and its fundamental principles of the present disclosure. Furthermore, those skilled in the art may make various modifications in terms of specific embodiments and scope of application in accordance with the teachings of the present disclosure. In summary, the contents of this specification should not be construed as a limitation of the present disclosure.

Claims

1. Claims A continuous extrusion machine, comprising a frame (15), and an extrusion wheel (1), a chamber (2) and a die (4) which are mounted on the frame (15), an annular groove (5) being formed in the extrusion wheel (1), in which annular projections extending along an axial direction of the extrusion wheel (1) are arranged oppositely on both sides of an open end of the annular groove (5), a projection gap is formed between the annular projections on both sides, a surface, close to the extrusion wheel (1), of the chamber (2) is provided with a chamber boss, the die (4) is mounted in the chamber boss, a surface, close to the extrusion wheel, of the die is provided with a die boss in smooth contact with the chamber boss,and both the chamber boss and the die boss are capable of penetrating into the projection space; and a groove space (38) is formed between the annular projections and a side wall of the annular groove (5), the groove space (38) is capable of containing an extruded rod, and the extruded rod is adhered to an inner wall of the groove space, wherein an insertion-guide plate (17) is also provided at an upper flow of the chamber (2), a surface, close to the extrusion wheel (1), of the insertion-guide plate (17) is provided with an insertion boss, the insertion boss is in smooth contact with the chamber boss, and the insertion boss, the chamber boss and the die boss together form a boss body matched with the extrusion wheel (1), wherein side surfaces on both sides of the boss body (9) are boss side surfaces (11),and opposite side surfaces of the annular projections on both sides are projection side surfaces (10), and a gap value in a vertical direction between the respective boss side surfaces (11) and projection side surfaces (10) is δ, and δ is 0.001 mm to 0.2 mm;, a distance between the protruding side surfaces (10) and the side wall of the open end of the annular groove (5) is w, and w is greater than or equal to 0.6 mm; a length value of the boss body (9) in a direction from an end face (7) of a stop block (8) to the plate of the introduction-guide (17) is L, and within a range of L which is less than or equal to 30 mm, H is greater than or equal to 3.5 mm, and n is greater than or equal to H; wherein, H is a vertical distance from a boss surface (3) of the boss body (9) to a wheel surface (6) of the extrusion wheel (1), and H is the same as different circumference angular positions of the extrusion wheel, and n is a height of the protrusion side surfaces (10).

2. A continuous extrusion machine according to claim 1, wherein the boss surface (3) of the boss body (9) is an arc surface, or the boss surface (3) is a smooth combination of an arc surface, a plane and a curved surface; the boss body (9) is integrally formed with the chamber (2), or the chamber boss, the insertion boss and the die boss are independently arranged and respectively formed on the chamber (2), the insertion-guide plate (17) and the die (4).

3. A continuous extrusion machine according to claim 1, wherein the boss body (9) is formed integrally with the die (4).

4. A continuous extrusion machine according to claim 1, wherein the surface, close to the extrusion wheel (1), of the chamber (2) is a chamber surface, the surface, close to the extrusion wheel (1), of the introduction-guide plate (17) is an introduction-guide plate surface, and a flash discharge channel (37) is formed between the chamber surface, the introduction-guide plate surface and the wheel surface (6) of the extrusion wheel (1).

5. The continuous extrusion machine according to claim 4, wherein the chamber surface and the introduction-guide plate surface are both provided with inclined faces (36), the inclined faces (36) are directly connected to the boss side surfaces (11), and the flash discharge channel (37) is formed between the inclined faces (36) and the wheel surface (6) of the extrusion wheel (1); or, the inclined faces (36) are connected to the boss side surfaces (11) via arcuate cambered surfaces (28), respectively, and the flash discharge channel (37) is formed among the inclined faces (36), the arcuate cambered surfaces (28) and the wheel surface (6) of the extrusion wheel (1).

6. A continuous extrusion machine according to claim 5, wherein when the inclined faces (36) are connected to the side surfaces (11) of bossing through the arcuate cambered surfaces (28), respectively, a vertical distance between the wheel surface (6) of the extrusion wheel (1) and the arcuate cambered surfaces (28) is m, and m is greater than or equal to 0.8 mm.

7. A continuous extrusion machine according to claim 1, wherein the die (4) is mounted on a shoe (18), the shoe (18) is mounted on the frame (15), a product discharge hole (35) is formed in the shoe (18) and penetrates therethrough, the product discharge hole (35) communicates with a plurality of die holes (29) of the die (4), and a die cooling water hole (34) is also formed in the shoe (18); and the die cooling water hole (34) and / or the product discharge hole (35) are capable of introducing a cooling medium into an end face of a product outlet (33) of the die (4).

8. A continuous extrusion machine according to claim 7, wherein the plurality of die holes (29) are formed in the die (4).

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