CONTINUOUS EXTRUSION MACHINE FOR EXTRUSION IN THE DIRECTION OF THE ROPE

Abstract

The present invention relates to a continuous extrusion machine for extrusion in the cord direction, comprising a rack, an extrusion wheel, a compaction wheel assembly, and a chamber mounted on the rack. The extrusion wheel is rotatably mounted on the rack via a main shaft. An annular groove is formed in the extrusion wheel. The compaction wheel assembly is configured to press extrusion rod materials into the annular groove of the extrusion wheel. A stop and a die are arranged on the chamber, and the stop can hold the extrusion rod materials inside the annular groove so that the extrusion rod materials are fed into the die. A front end of a stop surface engages with a die mounting surface. The die is integrated into the die mounting surface.A central die hole line is located in one chord direction of the extrusion wheel. [Fig. 9].

Description

Title of the invention: CONTINUOUS EXTRUSION MACHINE FOR CORDWISE EXTRUSION Technical field

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

[0002] A key technology of continuous extrusion is how to reduce the radial pressure and torque of an extrusion wheel to improve the service life of the extrusion wheel, main shaft and main shaft bearing.

[0003] The invention patent CN201310022732.6 describes a continuous extrusion process and extrusion equipment for non-radial feeding. Although the right-angle flow of extrusion rod materials in front of a stopper is changed to an obtuse-angle flow resulting in a reduction in extrusion resistance, the height of a chamber feed port on the side near an arcuate seal block is obviously higher than that on the side near the stopper, resulting in an increase in flow resistance and obvious increases in extrusion temperature and pressure.

[0004] Therefore, it is urgent to provide a new continuous extrusion machine to reduce the extrusion load. Summary of the invention

[0005] The present disclosure aims to provide a continuous extrusion machine for chordwise extrusion to solve problems of the prior art. The extrusion load can be effectively reduced, and the service life of the device can be prolonged.

[0006] In order to achieve the aim, the present disclosure provides the following scheme.

[0007] The present disclosure provides a continuous extrusion machine for chordwise extrusion. The continuous extrusion machine for chordwise extrusion comprises a rack, and an extrusion wheel, a compacting wheel assembly, and a chamber which are mounted on the rack. The extrusion wheel is rotatably mounted on the rack via a main shaft. An annular groove is formed in the extrusion wheel. The compacting wheel assembly is configured to press extrusion rod materials into the annular groove of the extrusion wheel. A stopper and a die are arranged on the chamber. The stopper is capable of locking the extrusion rod materials in the annular groove so that the extrusion rod materials are introduced into the die. A front end of a stop surface of the stop is engaged with a die mounting surface, the die is embedded in the die mounting surface. A die hole centerline of the die is located in a chord direction of the extrusion wheel.

[0008] Preferably, an included angle between an extrusion wheel center line passing through a starting point of the stop surface and the die mounting surface is [3, and a value of [3 is less than or equal to 85° and greater than or equal to 10°. Here, the starting point of the stop surface is an end point of the stop surface near the extrusion wheel and located on a section of the stop.

[0009] Preferably, a surface, near a groove bottom of the annular groove, of the stopper is a sealing cambered surface. A rear end of the sealing cambered surface is engaged with an enlarged surface. A point B is arranged on the enlarged surface at a position 30 mm rearward from a starting point A of the enlarged surface. An included angle between a connecting line of the starting point A and the point B and the die hole center line is 0, and a value of 0 is less than or equal to [3 + 20° and greater than or equal to [3 + 3°. The starting point A and the point B are both located on the section of the stopper in which the die hole center line is located, and the starting point A is an end point of the enlarged surface near the sealing cambered surface.

[0010] Preferably, a vertical distance from the die hole center line to an extrusion wheel center line parallel to the die hole center line is H, a value of H is less than or equal to 0.4981D + w and greater than or equal to 0.0868D + w. Here, D is a diameter of the extrusion wheel, and w is a notch width of the annular groove.

[0011] Preferably, a front end of the chamber is provided with an arcuate sealing block, surfaces, facing the extrusion wheel, of the chamber and the arcuate sealing block are provided with a boss, and the boss is capable of extending into the annular groove. Boss side planes on both sides of the boss extend to the die mounting surface and are flush with respective stop side planes of the stop, and a gap from each of the boss side planes to a corresponding one of side planes of an annular groove open end is δ, and a value of δ is between 0.001 mm and 0.2 mm.

[0012] Preferably, in the case where a length from the die mounting surface to the arcuate sealing block is not more than 30 mm, a vertical distance of the boss extending into the annular groove is m, a value of m is greater than or equal to 3.5 mm, a height of each of the side planes of the annular groove open end is n, and a value of n is greater than or equal to the value of m.

[0013] Preferably, a boss surface of the boss is a cambered surface, or the boss surface is a combination of a cambered surface, a curved surface, and a plane.

[0014] The die mounting surface is a plane or a curved surface, or the die mounting surface is a combination of a plane and a curved surface.

[0015] Preferably, a die cooling channel is formed in the abutment, a first end of the die cooling channel extends out of the chamber, and another end of the die cooling channel is proximate to the die, so as to introduce a cooling medium into the die.

[0016] Preferably, two die holes are formed in the die symmetrically with respect to a groove symmetry plane of the annular groove, or two die holes arranged in an upward and downward direction are formed in the die.

[0017] Preferably, the chamber is mounted on a shoe. The shoe is rotatably mounted on the rack via a shoe pivot, and the shoe is connected to a drive device. The drive device is capable of rotating the shoe. A locking device is also rotatably mounted on the rack, and the locking device is capable of locking the shoe.

[0018] Here, the shoe is arranged horizontally or vertically.

[0019] Compared with the prior art, the present disclosure has the following beneficial technical effects.

[0020] The die is mounted on the stopper, so that a flow path of the extrusion rod materials is the shortest to minimize the path friction between the extrusion rod materials and the stopper during the extrusion process, so that the extrusion load can be effectively reduced, and the service life of the device is prolonged. In addition, in the present disclosure, the flow path of the extrusion rod materials is changed from the approximate right-angle flow of the traditional continuous extrusion to the obtuse-angle flow, so that the extrusion load is reduced. Compared with the traditional tangential extrusion, the damage of the stopper is reduced, and the service life of the device can be further prolonged. Brief description of the figures

[0021] To more clearly illustrate the present embodiment of the present disclosure or the technical diagram of the prior art, the following briefly presents the accompanying drawings for use in the present embodiment. Obviously, the drawings attached to the following description only represent certain embodiments of the present disclosure, and those skilled in the art can still deduce other drawings from these accompanying drawings without creative effort.

[0022] [Fig-1] is a sectional view of a continuous extrusion machine for chordwise extrusion taken along an annular groove centerline when a shoe is arranged vertically according to an embodiment of the present disclosure.

[0023] [Fig.2] is a sectional view AA of [Fig.l].

[0024] [Fig.3] is a partial enlarged view of [Fig.l], showing only parts of a arched sealing block, chamber, stop, die, chamber sleeve, pressure plate, extrusion wheel and shoe.

[0025] [Fig.4] is a partial enlarged drawing of [Fig.3], showing only the die and the stop and providing only one die hole.

[0026] [Fig.5] is a partial enlarged drawing of [Fig.3], showing only the die and the stop and providing two die holes arranged in an upward and downward direction.

[0027] [Fig.6] is a sectional view BB of [Fig.3], showing only parts of the wheel extrusion, stop and chamber.

[0028] [Fig.7] is a schematic view of an arched sealing block with a boss classic of [Fig.6].

[0029] [Fig.8] is a schematic view of an arched sealing block with a boss for an axial seal of [Fig.6].

[0030] [Fig.9] is a sectional view CC of [Fig.8], showing only parts of a arched sealing block, chamber, stop, die, chamber sleeve, pressure plate, extrusion wheel and shoe.

[0031] [Fig.10] is a sectional view DD of [Fig.4], providing only one die hole.

[0032] [Fig. 11] is a schematic diagram of [Fig. 10] replaced by two horizontally arranged die holes.

[0033] [Fig. 12] is a sectional view of a continuous extrusion machine for chordwise extrusion taken along an annular groove center line when a shoe is arranged horizontally according to the embodiment of the present disclosure.

[0034] [Fig.13] is a partial enlarged view of [Fig.12], showing only portions of an arcuate seal block, chamber, stop, die, pressure plate, extrusion wheel, and shoe.

[0035] Reference numerals: 1, extrusion wheel; 2, stopper; 3, die mounting surface; 4, die; 5, arcuate seal block; 6, chamber; 7, chamber cover; 8, annular groove; 9, arcuate seal block cambered surface; 10, main shaft; 11, bearing; 12, bearing seat; 13, rack; 14, compacting wheel assembly; 15, scraper assembly; 16, shoe; 17, shoe pivot; 18, compression device; 19, compression device shaft; 20, first oil cylinder; 21, pressure plate; 22, chamber sleeve; 23, die cooling channel; 24, wheel surface; 25, sealing cambered surface; 26, extrusion wheel inner surface; 27, extrusion wheel center line parallel to die hole center line; 28, die hole center line; 28-1, outlet center line I of two-die-hole extrusion product; 28-2, outlet center line II of two-die-hole extrusion product; 29, die hole; 30, groove symmetry plane; 31, stop surface; 32, side plane of annular groove open end; 33, stop side plane; 34, boss side plane; 35, boss; 36, boss surface; 37, extrusion wheel center line passing through the starting point of the stop surface; 38, enlarged surface; 39, connecting line from the starting point A to point B; 40, second oil cylinder;

[0036] H, vertical distance from die hole centerline to extrusion wheel centerline parallel to die hole centerline;

[0037] Hl, vertical distance from the outlet center line I of the two-die-hole extrusion product to the extrusion wheel center line parallel to the die-hole center line;

[0038] H2, vertical distance from the center line of exit II of the two-extrusion product die holes to extrusion wheel centerline parallel to die hole centerline;

[0039] [3, included angle between the center line of the extrusion wheel passing through the point of start of the stop surface and the die mounting surface;

[0040] 0, included angle between the connecting line from starting point A to point B and the line die hole center;

[0041] y, complementary angle of angle [3, y being equal to 180° - [3;

[0042] m, vertical distance of boss extending into the annular groove;

[0043] n, height of an open end lateral plane of an annular groove;

[0044] ô, space between a boss lateral plane and a corresponding annular groove open end lateral plane; and

[0045] w, annular groove notch width. Detailed description of the invention

[0046] The following clearly and completely describes the technical scheme in the present embodiments of the present disclosure with reference to the drawings attached to 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 of the present disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of the present disclosure.

[0047] The objective of the present disclosure is to provide a continuous extrusion machine for chordwise extrusion to solve the previous problems in the prior art, so that the extrusion load can be effectively reduced and the service life of a die is prolonged.

[0048] To make the foregoing objective, features and advantages of the present disclosure clearer and more understandable, the present disclosure is described in more detail below with reference to the accompanying drawings and specific embodiments.

[0049] Embodiment I

[0050] As shown in Figures 1 to 13, the embodiment provides a continuous extrusion machine for chordwise extrusion. The continuous extrusion machine for chordwise extrusion comprises a rack 13, and an extrusion wheel 1, a compacting wheel assembly 24, a chamber 2 and a die 4 which are mounted on the rack 13. The extrusion wheel 1 is rotatably mounted on the rack 13 via a main shaft 12. Specifically, bearings 11 are arranged on two ends of the main shaft 10 to support the main shaft 10. The bearing 11 is mounted in a bearing seat 12. The bearing seat 12 is mounted on the rack 13. The rack 13 is mounted on a base (not shown in the figures). An annular groove 8 is formed in an outer circumferential surface of the extrusion wheel 1.The compacting wheel assembly 24 is configured to press extrusion rod materials into the annular groove 8 of the extrusion wheel 1. A stopper 2 and a die 4 are arranged on the chamber 6. The stopper 2 can block the extrusion rod materials inside the annular groove 8 so as to introduce them into the die 4. It should be noted that the structure refers to a mature prior art in this field, and unnecessary details are no longer given in the embodiment.

[0051] In the embodiment, a stop surface 31 of the stopper 2 is engaged with a die mounting surface 3 opposite the extrusion wheel 1, the die 4 is embedded in a mounting hole or a mounting groove in the die mounting surface 3, and a die hole center line 28 of the die 4 is located in a chord direction of the extrusion wheel 1.

[0052] In the embodiment, the die 4 is mounted on the stopper 2, so that a flow path of the extrusion rod materials is the shortest to minimize the path friction between the extrusion rod materials and the stopper 2 when of the extrusion process, so that the extrusion load can be effectively reduced, and the service life of the device is prolonged. Furthermore, in the embodiment, the flow path of the extrusion rod materials is changed from the approximate right-angle flow of traditional continuous extrusion to the obtuse-angle flow, so that the extrusion load is reduced. Compared with traditional tangential extrusion where the stopper 2 is sheared in a large portion, the stress state of the stopper 2 of the present disclosure is changed to a unidirectional compression state in a large portion and a shear state in a small portion, so that the damage caused by the stopper being sheared in a large portion can be reduced, and the service life of the device can be further prolonged.

[0053] In the embodiment, the chamber 6 is mounted on a shoe 16. As shown in [Fig.l], the shoe 16 is arranged vertically and rotatably mounted on the rack 13 via a shoe pivot 17. The shoe 16 is connected to the shoe pivot 17 with splines. Two ends of the shoe pivot 17 are mounted on the rack 13. A first end of the shoe pivot 17 is connected to an oil motor (not shown in the figures). The oil motor rotates to cause the shoe 16 to open and close. The shoe 16 is locked to the rack 13 by a compression device 18 in operation. The compression device 18 can rotate about a compression device shaft 19 to ensure that the shoe 16 can be opened. Two ends of the compression device shaft 19 are mounted on the rack 13. The compression device 18 is opened and closed by means of a first oil cylinder 20.One end of the first oil cylinder 20 is connected to the compression device 18, and the other end of the first oil cylinder 20 is connected to the rack 13.

[0054] In the embodiment, as shown in [Fig.2], the bearing 11 is preferably a cylindrical rolling bearing, so that the main shaft can be easily moved on the bearing seat 12, and the stop 2 can be automatically aligned with the annular groove 8.

[0055] In the embodiment, as shown in [Fig. 10] and [Fig. 1 1], a cooling water groove is formed in an extrusion wheel inner surface 26 (an inner annular surface of the extrusion wheel near the main shaft 10). The cooling water groove can be filled with cooling water to cool the extrusion wheel 1, thereby reducing the amount of thermal expansion of the extrusion wheel 1 and avoiding direct contact between a side plane of the annular groove open end 32 and a stopper side plane 33 caused by thermal expansion to prevent abrasion therebetween.

[0056] In the embodiment, as shown in [Fig.l] and [Fig.12], a scraper assembly 15 is also mounted on the rack 13, and the scraper assembly 14 is configured to remove overflow on a wheel surface 24 of the extrusion wheel.

[0057] In the embodiment, as shown in [Fig. 12], another scheme is given for opening and closing the shoe 16 by means of a second oil cylinder 40, and for opening and closing the compression device 18 by hand.

[0058] In the embodiment, as shown in [Fig.l] and [Fig.12], when an angle [3] is larger, the device arrangement structure shown in [Fig.l] is preferably adopted, i.e., the shoe 16 is arranged vertically. When an angle [3] is smaller, the device arrangement structure shown in [Fig. 12] is preferably adopted, i.e., the shoe 16 is arranged horizontally. By adopting the above device arrangement structure, the compression pressure is reduced, and the mechanical strength of the device is improved.

[0059] Alternatively, the shoe 16 may be arranged obliquely, and in addition to being able to arrange the main shaft 10 horizontally substantially parallel to the ground, the main shaft 10 may also be arranged substantially perpendicular to the ground, thereby forming a vertically arranged continuous extrusion machine.

[0060] In the embodiment, as shown in [Fig. 3], the chamber 6 is mounted inside a chamber sleeve 22 in the shoe 16 (the chamber sleeve is not shown in [Fig. 3], but shown in [Fig. 1]). The stopper 2 is mounted on the chamber 6. The die 4 is mounted on the die mounting surface 3. The chamber cover 7 fixes the stopper 2 on the chamber 6. An arcuate seal block 5 is mounted on a front end of the chamber 6 near the compacting wheel assembly 14. An upper end of the arcuate seal block 5 is provided with a pressure plate 21 for fixing the arcuate seal block 5 and the die 4 on the shoe 16.

[0061] The purpose of providing the chamber sleeve 22 is to introduce cooling water into the chamber sleeve 22 so as to reduce the temperature of the stopper 2 and the chamber 6. At the same time, the chamber sleeve 22 is convenient to replace when the chamber sleeve 22 is further damaged due to accidental damage to the stopper 2.

[0062] In the embodiment, as shown in Figures 3 to 5 and [Fig.9], the stopper 2 and the annular groove 8 cooperate with each other. The stopper 2 is provided with a cambered sealing surface 25. A starting end of the cambered sealing surface 25 is provided with the stop surface 31. The stop surface 31 is engaged with the die mounting surface 3. A mounting hole or a mounting groove is formed in the die mounting surface 3 for mounting the die 4. A die hole 29 is formed in the die 4. The vertical distance from the die hole center line 28 to the extrusion wheel center line parallel to the die hole center line 28 is H, and the value of H is between (0.0868D + w) and (0.4981D + w), namely H is greater than or equal to (0.4981D + w) and less than or equal to (0.0868D + w). As shown in [Fig.5], two die holes 29 are arranged in an upward and downward direction. The vertical distance between an outlet center line I of a two-die-hole extrusion product and the extrusion wheel center line 27 parallel to the die hole center line is H1, and the vertical distance between an outlet center line II of a two-die-hole extrusion product and the extrusion wheel center line 27 parallel to the die hole center line is H2.The values ​​of Hl and H2 are between (0.0868D + w) and (0.4981D + w), where, w is the notch width of the annular groove, and D is the diameter of the extrusion wheel.

[0063] In the embodiment, as shown in Figures 3-5 and [Fig.9], an included angle between the extrusion wheel center line 37 passing through a starting point of the stop surface and the die mounting surface is [3, and the value of [3 is between 10° and 85°.

[0064] In the embodiment, as shown in FIGS. 3 to 5 and [Fig. 9], a rear end of the sealing cambered surface 25 of the stopper 2 is engaged with an enlarged surface 38. The enlarged surface 38 not only increases the shear-supporting area of ​​the stopper 2, but also effectively increases the heat-dissipating area of ​​the stopper 2, so that the temperature of the stopper 2 is reduced to improve the material strength thereof. Therefore, the enlarged surface 38 can effectively improve the strength of the stopper 2. The enlarged surface 38 may be a cambered surface or a combination of a cambered surface and a plane. A point B is arranged on the enlarged surface 38 at a position 30 mm behind a starting point A.An included angle between a connecting line 39 from starting point A to point B and the die hole center line is 0, the value of 0 is between [3 + 3° and [3 + 20°. When the enlarged surface 38 is a plane, the enlarged surface 38 coincides with the connecting line 39 from starting point A to point B. .

[0065] In the embodiment, as shown in Figures 3 to 5, a die cooling channel 23 is formed in the chamber 6 and the stopper 2 to introduce a cooling medium into an end surface of the die 4 so as to reduce the die temperature and prolong the service life of the die.

[0066] In the embodiment, as shown in [Fig.6], the arcuate sealing block 5 may not be provided with a boss. A certain space is formed between a cambered surface of arcuate sealing block 9 and the wheel surface 24 of the extrusion wheel 1, and the gap is called radial gap. In the diagram, the radial gap is used to regulate the overflow of the overflow.

[0067] As shown in [Fig.7], the arcuate sealing block 5 is provided with a conventional boss 35. A certain gap is formed between a boss side plane 34 and the side plane of the annular groove open end 32, and the gap is called an axial gap. The depth of the boss 34 extending into the annular groove is not more than 2.5 mm. A certain gap is formed between the arcuate sealing block cambered surface 9 and the wheel surface 24 of the extrusion wheel 1, and the gap is called a radial gap. In the diagram, the axial gap and the radial gap are used to jointly seal the overflow.

[0068] As shown in [Fig.8] and [Fig.9], the chamber 6 and the arcuate seal block 5 are provided with the boss 35 extending into the annular groove 8. Two boss side planes 34 of the boss 35 extend to the die mounting surface 3. The gap between the boss side plane 34 and the corresponding side plane of the annular groove open end 32 is δ, and the value of δ is between 0.001 mm and 0.2 mm. In the case where a length from the die mounting surface to the arcuate seal block is not more than 30 mm, the vertical distance m of the boss 35 extending to the annular groove 8 (namely, the vertical distance from the boss surface 36 to the wheel surface 24 of the extrusion wheel 1) is not less than 3.5 mm, and the value of the height n of the side plane of the annular groove open end 32 is not less than the value of m.In the diagram, since the space between the side plane of the annular groove open end 32 and the boss side plane 34 is used to seal the overflow, the space between the chamber 6 and the cambered surface of the arcuate sealing block 9 and the extrusion wheel 1 is used as an overflow channel.

[0069] In the embodiment, as shown in [Fig.10] and [Fig.1 1], the gap between the abutment lateral plane 33 and the corresponding lateral plane of the annular groove open end 32 is also δ, and the value of δ is between 0.001 mm and 0.2 mm.

[0070] In the embodiment, the arcuate sealing block cambered surface 9 may be formed by combining cambered surfaces arranged on the arcuate sealing block 5, the stopper 2 and the chamber 6. The boss surface 36 may be respectively arranged on the chamber 6 and the arcuate sealing block 5, or the chamber 6 and the arcuate sealing block 5 may be provided as an integral part. The boss surface 36 may be an arcuate surface or another curved surface or a combination of a curved surface and a plane.

[0071] In the embodiment, the stopper 2 and the chamber 6 may be manufactured as an integral part, resulting in the disadvantages that, when the stopper is damaged, the entire chamber 6 is scrapped and the production cost is increased. The stopper 2 may be composed of a plurality of divided parts.

[0072] In the embodiment, the die mounting surface 3 may be a flat surface or a curved surface, and the die mounting surface 3 is substantially perpendicular to the die hole centerline 28.

[0073] In the embodiment, as shown in [Fig. 10] and [Fig. 1 1], one die hole 29 may be formed in the die 4 to extrude one product, or two die holes 29 may be formed horizontally to extrude two products at the same time. When the two die holes 29 are arranged horizontally, the product sizes of the two die holes 29 must be the same, otherwise the extrusion speed of the two products is very different. Alternatively, two die holes 29 may be formed in an upward and downward direction, or other numbers of die holes 29 may be formed based on specific work requirements.

[0074] It should be noted that for those skilled in the art, the present disclosure is obviously not limited to the details of the exemplary embodiment, and the present disclosure may be embodied in other specific forms without departing from the spirit or essential characteristics of the present disclosure. Accordingly, in all cases, the embodiments are to be considered illustrative and not limiting, the scope of the present invention is defined by the appended claims rather than by the above description, and all changes which fall within the meaning and range of equivalence of the claims are therefore intended to be included herein, and the reference numerals in the claims are not to be construed as limiting the claims to which they refer.

[0075] 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. In addition, 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

Claims

1. A continuous extrusion machine for chordwise extrusion, comprising a rack (13), and an extrusion wheel (1), a compacting wheel assembly (14) and a chamber (6) which are mounted on the rack (13), wherein the extrusion wheel (1) is rotatably mounted on the rack (13) via a main shaft (10), an annular groove (8) is formed in the extrusion wheel (1), and the compacting wheel assembly (14) is configured to press extrusion rod materials into the annular groove (8) of the extrusion wheel (1); a stopper (2) and a die (4) are arranged on the chamber (6), and the stopper (2) is capable of blocking the extrusion rod materials inside the annular groove (8) so that the extrusion rod materials are fed into the die (4);and wherein a front end of a stop surface (31) of the stopper (2) is engaged with a die mounting surface (3), the die (4) is embedded in the die mounting surface (3), and a die hole center line (28) of the die (4) is located in a chord direction of the extrusion wheel (1).;

2. A continuous extrusion machine for chordwise extrusion according to claim 1, wherein an included angle between an extrusion wheel center line (37) passing through a starting point of the stop surface (31) and the die mounting surface (3) is [3, and a value of [3 is less than or equal to 85° and greater than or equal to 10°; wherein, the starting point of the stop surface (31) is an end point of the stop surface (31) near the extrusion wheel (1) and located on a section of the stopper (2).

3. A continuous extrusion machine for chordwise extrusion according to claim 2, wherein a surface, near a groove bottom of the annular groove (8), of the stopper (2) is a sealing cambered surface (25), a rear end of the sealing cambered surface (25) is engaged with an enlarged surface (38), and a point B is arranged on the enlarged surface (38) at a position 30 mm behind a starting point A of the enlarged surface (38), an included angle between a connecting line (39) from the starting point A to the point B and the die hole center line (28) is 0, a value of 0 is less than or equal to [3 + 20° and greater than or equal to [3 + 3°; wherein, the starting point A and the point B are both located on the section of the stop (2) in which the die hole centerline (28) is located, and the starting point A is an end point of the enlarged surface (38) near the sealing cambered surface (25).

4. A continuous extrusion machine for chordwise extrusion according to claim 1, wherein a vertical distance from the die hole center line (28) to an extrusion wheel center line (27) parallel to the die hole center line (28) is H, a value of H is less than or equal to 0.4981D + w and greater than or equal to 0.0868D + w; wherein, D is a diameter of the extrusion wheel (1), and w is a notch width of the annular groove (8).

5. A continuous extrusion machine for chordwise extrusion according to claim 1, wherein a front end of the chamber (6) is provided with an arcuate sealing block (5), surfaces, facing the extrusion wheel (1), of the chamber (6) and the arcuate sealing block (5) are provided with a boss (35), and the boss (35) is capable of extending into the annular groove (8); boss side planes (34) on both sides of the boss (35) extend to the die mounting surface (3) and are flush with the respective stop side planes (33) of the stop (2), and a gap between each of the boss side planes (34) and a corresponding one of the annular groove open end (32) side planes is δ, and a value of δ is between 0.001 mm and 0.2 mm.

6. A continuous extrusion machine for chordwise extrusion according to claim 5, wherein, in the case where a length from the die mounting surface (3) to the arcuate seal block (5) is not more than 30 mm, a vertical distance of the boss (35) extending into the annular groove (8) is m, a value of m is greater than or equal to 3.5 mm, a height of each of the side planes of the annular groove open end (32) is n, and a value of n is greater than or equal to the value of m.

7. A continuous extrusion machine for chordwise extrusion according to claim 6, wherein a boss surface (36) of the boss (35) is a cambered surface, or the surface of boss (36) is a combination of a cambered surface, a curved surface and a plane; and the die mounting surface (3) is a plane or a curved surface, or the die mounting surface (3) is a combination of a plane and a curved surface.

8. A continuous extrusion machine for chordwise extrusion according to claim 1, wherein a die cooling channel (23) is formed in the stopper (2), one end of the die cooling channel (23) extends out of the chamber (6), and another end of the die cooling channel (23) is close to the die (4), so as to introduce a cooling medium into the die (4).

9. A continuous extrusion machine for chordwise extrusion according to claim 1, wherein two die holes (29) are formed in the die (4) symmetrically with respect to a groove symmetry plane (30) of the annular groove (8), or two die holes (29) arranged in an upward and downward direction are formed in the die (4).

10. A continuous extrusion machine for chordwise extrusion according to claim 1, wherein the chamber (6) is mounted on a shoe (16), the shoe (16) is rotatably mounted on the rack (13) via a shoe pivot (17), the shoe (16) is connected to a driving device, and the driving device is capable of driving the shoe (16) to rotate; and a locking device is also rotatably mounted on the rack (13), and the locking device is capable of locking the shoe (16); wherein, the shoe (16) is arranged horizontally or vertically.

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