Extrusion equipment capable of radially shrinking in axial movement

Abstract

The extrusion equipment comprises an extrusion device and a supporting device, the extrusion device comprises a shell, the interior of the shell is hollow, a port is formed in one end of the shell, and a positioning seat is arranged in the center of the port; a telescopic mechanism is arranged in the shell, the telescopic end of the telescopic mechanism is annularly and uniformly connected with a plurality of mold bases, extrusion molds are detachably mounted on the inner circumferential sides of the mold bases, and a space circle formed by the multiple extrusion molds is coaxial with the positioning base; the peripheral surface of the mold seat is in sliding fit with the inner wall of the shell, and a conical reducing section is arranged at the position, close to the outlet, of the shell and used for guiding the mold seat to radially contract when the mold seat axially approaches the port; the supporting device is used for supporting the filter element from the outside of the port of the extrusion device so as to ensure that the filter element is coaxially matched with the positioning seat; and when the plurality of extrusion dies shrink in the radial direction, the extrusion dies are matched with the positioning seat to extrude the ends of the filter elements. The multiple extrusion dies are synchronously driven through one telescopic mechanism, the structure is simple, and efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of filter element processing, and in particular to an extrusion device which contracts radially during axial movement. Background Art

[0002] The function of the filter element end caps is to close the ends of the filter media and provide support. They are usually made of steel plates and stamped into the required shape. When the filter element is installed on the vehicle and engine, the air filter will be subjected to great stress due to the vibration generated by mechanical movement, and the end caps can enhance the load-bearing capacity of the filter media.

[0003] At present, the assembly process of the filter element end head relies on the extrusion equipment. However, the extrusion equipment in the prior art has the following technical defects: first, the multiple extrusion heads in the extrusion device need to be radially contracted from the circumference of the filter element end head for extrusion. Therefore, each extrusion head needs to be connected to a separate driving mechanism, resulting in a complex structure of the extrusion device; second, different extrusion heads are required for filter element ends of different types. The extrusion head is difficult to process as a mold and has high cost. Summary of the invention

[0004] The object of the present invention is to provide an extrusion device which contracts radially during axial movement, so as to solve the above-mentioned technical problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an extrusion device that radially contracts during axial movement, used for extrusion processing of a filter element end head, comprising an extrusion device and a supporting device, wherein the extrusion device comprises a shell, the interior of the shell is hollow, one end of the shell is open, and a positioning seat is provided at the center of the port; a telescopic mechanism is provided in the shell, the telescopic mechanism has a telescopic end coaxial with the positioning seat, the telescopic end is circumferentially and evenly connected to a plurality of mold seats, an inner peripheral side of the mold seat is detachably mounted with an extrusion mold, and a space circle formed by a plurality of the extrusion molds is coaxial with the positioning seat; the outer peripheral surface of the mold seat is slidably matched with the inner wall of the shell, and the shell is provided with a conical diameter reduction section near the outlet position, which is used to guide the radial contraction of the mold seat when the mold seat is axially close to the port; the supporting device is used to support the filter element from the outside of the port of the extrusion device to ensure that the filter element is coaxially matched with the positioning seat; when the plurality of the extrusion dies are radially contracted to, they cooperate with the positioning seat to extrude the filter element end head.

[0006] In a possible embodiment, the telescopic end of the telescopic mechanism is fixedly connected to a push plate 1, and a plurality of push rods are evenly connected to the push plate 1 in an annular direction. The end of the push rod away from the telescopic end is fixedly connected to a push plate 2, and the space circle formed by each of the push plates 2 is coaxial with the positioning seat, and each of the push plates 2 is radially slidably connected to the mold seat along its space circle.

[0007] In a possible implementation manner, a permanent magnet is provided on a surface of each mold base close to the shell, and an inner wall of the shell is made of a magnetic metal material.

[0008] In a possible implementation, a fine-tuning device is installed on the operating side end face of the extrusion device, and one end of the fine-tuning device entering the housing abuts against the die seat to limit the end point of the axial movement of the die seat.

[0009] In a possible embodiment, a baffle plate is provided in the shell and is located between the telescopic mechanism and the positioning seat, a positioning seat connecting shaft is fixedly connected to the baffle plate, the positioning seat is fixedly connected to one end of the positioning seat connecting shaft extending toward the shell port, and a through hole is opened on the baffle plate to accommodate the push rod to pass freely.

[0010] In a possible embodiment, a wedge block is fixedly connected to the inner circumferential surface of each mold seat, and a guide sliding seat that cooperates with the wedge block is protruded on the circumferential side of the positioning seat connecting shaft to guide the radial opening of each mold seat when it is reset.

[0011] In a possible implementation manner, at least one reset spring is disposed between two adjacent extrusion dies, and the reset spring provides power for resetting each extrusion die.

[0012] In one possible embodiment, the extrusion mold includes a mold body, a mold slider is integrally formed in the first direction of the mold body, the mold slider is used to cooperate with the mold base, one end of the mold body has an extrusion head, the second direction of the extrusion head has an extrusion end, and the second direction is opposite to the first direction.

[0013] In a possible embodiment, the extrusion equipment that radially contracts during axial movement of the present invention also includes a processing platform, on which a first support is installed, and the extrusion device is detachably installed on the first support, and the installation direction of the extrusion device and the first support is adjustable.

[0014] In a possible embodiment, the support device includes a second support fixedly connected to the processing platform, two support plates detachably fixed to the second support, the two support plates are arranged at intervals, two support rods are connected between the two support plates along the width direction, at least two support seats are detachably installed between the two support rods, and the support seats are provided with limit grooves adapted to the outer diameter of the filter element.

[0015] In a possible implementation manner, the positioning seat is detachably mounted on the end of the positioning seat connecting shaft.

[0016] In a possible implementation manner, eight mold seats are provided, and one mold body is installed on each mold seat. When the eight mold bodies are closed, a complete circle is formed.

[0017] The present invention discloses the following technical effects:

[0018] The present invention uses a telescopic mechanism to synchronously drive multiple extrusion dies, converting axial motion into radial contraction extrusion action, simplifying the structure of the traditional extrusion device, and improving the efficiency of the extrusion operation and the consistency of the processed products. At the same time, the extrusion die of the present invention is driven by multiple die seats, which is easy to replace, can reduce the processing difficulty and cost of the die, and improve the service life of the die. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a front view of the device of the present invention;

[0021] Figure 2 It is a right side view of the device of the present invention;

[0022] Figure 3 A top view of the device of the present invention;

[0023] Figure 4 is an axonometric view of the device of the present invention;

[0024] Figure 5 It is an enlarged view of the extrusion device in the device of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the supporting device in the device of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the extrusion assembly in the device of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the extrusion die in the device of the present invention;

[0028] Fig. 9 is a cross-sectional view of a housing in the device of the present invention;

[0029] Fig.10 A cross-sectional view of an extrusion device in one embodiment of the present invention Figure 1 ;

[0030] Fig.11 A cross-sectional view of an extrusion device in one embodiment of the present invention Figure 2 ;

[0031] Fig.12 A cross-sectional view of an extrusion device in another embodiment of the present invention Figure 1 ;

[0032] Fig.13 A cross-sectional view of an extrusion device in another embodiment of the present invention Figure 2 ;

[0033] Fig.14 It is a schematic structural diagram of an extrusion assembly in another embodiment of the present invention.

[0034] In the figure: 1. processing platform; 2. first support; 3. extrusion device; 30. connecting terminal; 31. shell; 32. baffle plate; 33. through hole; 34. reduced diameter section; 35. positioning seat connecting shaft; 36. guide sliding seat; 4. compressed gas pipeline; 5. air compressor; 6. supporting device; 61. second support; 62. groove one; 63. groove two; 64. support plate one; 65. support plate two; 66. support rod; 67. support seat; 68. limit groove; 7. extrusion assembly; 71. extrusion die; 711. die body; 712. extrusion head; 713. die slide block; 714. extrusion end; 72. reset spring; 8. positioning seat; 9. telescopic cylinder; 10. push plate one; 11. push rod; 12. push plate two; 13. die seat; 14. permanent magnet; 15. wedge block; 16. fine-tuning device. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figures 1 to 9As shown, the present invention provides an extrusion device that contracts radially during axial movement, which is used to squeeze and fix the filter element end head on the end of the filter element. The filter element referred to in the present invention is a tubular filter element, and the end of the filter element needs to be connected to the filter element end head to protect the filter element and facilitate the connection with the use device. The extrusion device that contracts radially during axial movement of the present invention includes an extrusion device 3 and a support device 6. The extrusion device 3 is used as a main component to press the filter element end head on one end of the filter element, and the support device 6 is used as an auxiliary component to provide support and positioning for the filter element when the extrusion device 3 is working. Specifically, the extrusion device 3 includes a housing 31, an extrusion assembly 7 located in the extrusion housing 31, a positioning seat 8 and a telescopic mechanism, wherein the extrusion assembly 7 and the positioning seat 8 cooperate to extrude the filter element end head, the positioning seat 8 is used to fix the filter element end head from the inside, and the extrusion assembly 7 squeezes and fixes the filter element end head on the filter screen through radial extrusion force, and the support device 6 supports and positions the filter element that needs to be installed with the filter element end head outside the extrusion device 3.

[0038] The shell 31 is hollow inside, with an open end and a connection terminal 30 for connecting to the compressed gas pipeline 4 extending from the top. Figure 5 As shown. Figures 9 to 11 As shown, a positioning seat 8 is provided at the center of the port of the shell 31, and the positioning seat 8 is fixed in the shell 31 through a positioning seat connecting shaft 35; a telescopic mechanism is provided in the shell 31, and the telescopic mechanism has a telescopic end coaxial with the positioning seat 8, which is used to drive the extrusion assembly to move axially; a plurality of die seats 13 are evenly connected to the telescopic end in an annular direction, and each die seat 13 is used to install an extrusion die 71, and an extrusion die 71 is detachably installed on the inner circumference of the die seat 13, and a plurality of extrusion dies 71 together constitute an extrusion assembly 7, and the space circle where the extrusion assembly 7 is located is coaxial with the positioning seat 8. Specifically, in this embodiment, 8 extrusion dies 71 are provided, as shown in FIG. Figure 7 As shown, Figure 7 (a) is a three-dimensional structural diagram of the extrusion assembly 7, Figure 7 (b) is a front view of the extrusion assembly 7; the outer peripheral surface of the die seat 13 is slidably matched with the inner wall of the shell 31, and the shell 31 is provided with a tapered diameter reduction section 34 near the outlet position, which is used to convert the axial movement part of the die seat 13 into a radial contraction movement to achieve the effect of axial and radial synchronous movement. The diameter reduction section 34 at the port of the shell 31 can guide each extrusion die 71 to radially contract when the die seat 13 is axially close to the port; the supporting device 6 is used to support the filter element from the outside of the port of the extrusion device 3 to ensure that the filter element is coaxially matched with the positioning seat 8; when the multiple extrusion dies 71 are radially contracted, they cooperate with the positioning seat 8 to extrude the end of the filter element.

[0039] The working principle of the extrusion equipment that radially contracts during axial movement disclosed in the above embodiment is: the telescopic mechanism drives the mold base 13 to operate axially, and the extrusion dies 71 installed on the inner circumferential side of each mold base 13 are evenly distributed in the circumferential direction, and under the guidance of the diameter reduction section 34 of the shell 31, the axial movement is changed into a radial synchronous contraction movement. The purpose is to achieve the synchronous radial contraction operation of 8 extrusion dies 71 through one motion unit (telescopic mechanism). Compared with the prior art that requires 8 different motion units to be set from the outer circumferential side of 8 extrusion dies 71, the structure of the present invention is simpler and the driving of the 8 extrusion dies 71 is more synchronous, which not only solves the problem of complex structure of the prior art, but also achieves the beneficial effects of consistent extrusion action and force.

[0040] In order to further solve the problem of difficulty in mold processing in the prior art, the present invention arranges a mold base 13 outside each extrusion mold 71, and the mold base 13 is slidably matched with the inner wall of the shell 31, and an inclined surface matching the locking section is arranged on the mold base 13, thereby realizing the standardization of the structure of the extrusion device 3. When it is necessary to process products with different limit numbers, it is only necessary to replace the extrusion mold 71, and the extrusion mold 71 does not need to be arranged on the inclined surface matching the diameter reduction section 34, thus reducing the difficulty of mold processing.

[0041] In this embodiment, the telescopic mechanism is a telescopic cylinder 9, which is fixed to the inner bottom of the shell 31. The telescopic cylinder 9 has a telescopic end facing the port of the shell 31, and the telescopic end is fixedly connected to a push plate 10. The side of the push plate 10 facing away from the telescopic end (the side facing the port of the shell 31) is evenly distributed with 8 push rods 11 in the circumference, and the end of the 8 push rods 11 away from the push plate 10 is fixedly connected to a push plate 2 12, and each push plate 2 12 is radially slidably connected to a mold seat 13. The sliding connection between the push plate 2 12 and the mold seat 13 can not only transmit the axial driving force of the telescopic cylinder 9 to the mold seat 13, but also realize the radial contraction movement of the mold seat 13. The mold seat 13 and the outer peripheral surface are slidably matched with the inner wall of the shell 31. The outer peripheral surface of the end of the mold seat 13 close to the port has an inclined surface matched with the diameter reduction section 34, and the inner peripheral surface of the end of the mold seat 13 close to the port can be detachably installed with the extrusion mold 71.

[0042] In order to enable the mold base 13 to be radially reset when it is retracted inward with the telescopic cylinder 9, a permanent magnet 14 is embedded in the outer peripheral surface of the mold base 13 of the present embodiment. At the same time, the inner wall of the shell 31 is made of magnetic metal. When the mold base 13 moves axially toward the telescopic cylinder 9, under the action of the magnetic force, the mold base 13 automatically approaches the inner wall of the shell 31. It should be understood that the magnetic attraction of the permanent magnet 14 should be greater than the radial sliding force between the mold base 13 and the push plate 12, and the magnetic attraction of the permanent magnet 14 is less than the thrust / pull of the telescopic cylinder 9.

[0043] In this embodiment, in order to provide an operating space for the telescopic cylinder 9 that drives the extrusion assembly to move axially, a partition plate 32 is provided inside the housing 31. The partition plate 32 is located between the telescopic mechanism and the positioning seat 8. The partition plate 32 is used to provide an installation point for the positioning seat 8. A positioning seat connecting shaft 35 is fixedly connected to the center of the partition plate 32. The positioning seat 8 is fixedly connected to one end of the positioning seat connecting shaft 35 extending towards the port of the housing 31. Eight through holes 33 for eight push rods 11 to freely pass through are formed in the partition plate 32. A certain distance should be left between the partition plate 32 and the telescopic cylinder 9 to ensure the axial stroke of the telescopic cylinder 9.

[0044] As Figure 7 , the extrusion assembly 7 includes eight independent extrusion dies 71. The eight extrusion dies 71 have the same structure and are circularly distributed. When the respective extrusion dies 71 are radially closed, the sides of the extrusion dies 71 abut against each other to jointly form a complete circular assembly. The structure of a single extrusion die 71 is as Figure 8 shown, including a die body 711. A die slider 713 is integrally formed on the first direction (the outer peripheral side of the circular assembly) of the die body 711. The die slider 713 is used to cooperate with the die seat 13. One end of the die body 711 has an extrusion head 712. The extrusion head 712 has an extrusion end 714 in the second direction (the outer peripheral side of the circular assembly). The second direction is opposite to the first direction.

[0045] As Figures 1 to 4 shown, the extrusion device that radially contracts during axial movement in this embodiment further includes a processing platform 1. The processing platform 1 can be a box structure. A first support 2 is installed on the upper surface of the processing platform 1. The extrusion device 3 is detachably installed on the first support 2. For example, as Figure 5 shown, the first support 2 can be a U-shaped structure with an upward opening. The extrusion device 3 is fixedly installed between two vertical frames through fastening bolts on both sides. The extrusion device 3 can be horizontally installed or vertically installed, and only needs to be fastened and angle-adjusted according to the needs of the processed product. Therefore, the installation direction of the extrusion device 3 and the first support 2 is adjustable.

[0046] As Figure 6 shown, the support device 6 includes a second support 61 fixedly connected to the processing platform 1, two support plates detachably fixed to the second support 61. The two support plates are spaced apart. Two support rods 66 are connected in the width direction between the two support plates. At least two support seats 67 are detachably installed between the two support rods 66. A limiting groove 68 adapted to the outer diameter of the filter element is formed in the support seat 67. Specifically, a groove one 61 and a groove two 62 are provided above the second support 61. A support plate one 64 is supported and installed in the groove one 61 through bolts, and a support plate two 65 is supported and installed in the groove two 62 through bolts. During actual use, different height support plates can be replaced according to the required support height.

[0047] In some embodiments, the positioning seat 8 is detachably mounted on the end of the positioning seat connecting shaft 35, and the processing requirements of filter elements with different inner diameters can be met by replacing the positioning seat 8.

[0048] like Fig.10 As shown, Fig.10 The state diagram of the extrusion device 3 in the initial position is shown. At this time, the telescopic cylinder 9 is in a compressed state, and the mold seat 13 is located inside the shell 31 and contacts the inner wall, and is in a radially open state.

[0049] like Fig.11 As shown, Fig.11 The state diagram of the extrusion device 3 when it is in the working position is shown. At this time, the telescopic cylinder 9 is in the extended state, the mold seat 13 moves axially to the port position of the shell 31, and is in the same axial position as the positioning seat 8. The inclined surface of the mold seat 13 contacts the reduced diameter section 34 of the shell 31, and the mold seat 13 is in a radially contracted state.

[0050] In other embodiments, specifically Fig.12 and Fig.13 As shown, a reduced diameter section 34 for guiding the mold seat 13 to shrink inward is provided on the inner side of the shell 31, and a guide sliding seat 36 for guiding the mold seat 13 to expand outward is provided on the outer peripheral side of the positioning seat connecting shaft 35. The side of the guide sliding seat 36 facing the mold seat 13 is a conical surface, and correspondingly, a wedge block 15 cooperating with the guide sliding seat 36 is provided on the inner peripheral surface of the mold seat 13. When the mold seat 13 moves axially inward under the drive of the telescopic mechanism, each mold seat 13 is stretched open under the guidance of the guide sliding seat 36, thereby achieving the same technical effect as radially opening each mold seat 13 by magnetic attraction in the above-mentioned embodiment.

[0051] In some other embodiments, at least one return spring 72 is disposed between two adjacent extrusion dies 71, and the return spring 72 provides power for opening and returning each extrusion die 71. Fig.14 As shown, Fig.14 (a) is a three-dimensional structural diagram of the extrusion assembly 7, Fig.14 (b) is a front view of the extruded assembly 7.

[0052] It is understandable that there are many devices or structures that can guide the mold base 13 to reset, such as setting a return spring, setting a magnetic ring in the shell 31, etc. The present invention only provides two structures that can achieve the above functions, and other structures are no longer exemplified one by one in the present invention.

[0053] When the extrusion die 71 contracts radially, it extrudes the end of the filter element. It can be designed to achieve a preset extrusion stroke when multiple extrusion dies 71 contract radially to be fully closed, or the radial stroke of the extrusion die 71 can be limited by setting a limit point. In some embodiments, this function can be achieved by setting an axial motion limit point, and in order to accurately control the stroke of the extrusion die 71, a fine-tuning device 16 is installed on the operating side end face of the extrusion device 3. One end of the fine-tuning device 16 entering the housing 31 abuts against the die seat 13 to limit the axial motion end point of the die seat 13. The fine-tuning device 16 is threadedly connected to the extrusion device 3, and the length of the fine-tuning device 16 entering the interior of the extrusion device 3 is adjusted by rotation, thereby achieving the adjustment of the axial limit point.

[0054] It should be understood that, in practical applications, the telescopic mechanism may also be other driving structures or mechanical devices capable of realizing linear motion functions / rotational motion / telescopic motion, for example, it may be a telescopic motor, a hydraulic cylinder, an electric cylinder, and the like.

[0055] An embodiment of the present invention further provides an extrusion method for radial contraction during axial movement, using any of the above-mentioned extrusion devices for radial contraction during axial movement, and the extrusion method comprises the following steps:

[0056] Step S1, equipment installation: select a suitable extrusion die 71 and a positioning seat 8 according to the size of the filter element and the filter element end to be processed and install them in the extrusion device 3; and select a suitable support device 6 according to the size of the filter element and the filter element end to be processed; ensure that the extrusion device 3 and the support device 6 are correctly installed on the processing platform 1, so that the center of the limit groove 68 above the support device 6 is on the same axis as the positioning seat 8 and the center of each extrusion die 71;

[0057] Step S2, placing the filter element: placing the filter element to be processed on the supporting device 6, ensuring that the filter element is coaxially matched with the positioning seat 8;

[0058] Step S3, start the extrusion device 3: start the telescopic mechanism (such as the telescopic cylinder 9), so that the telescopic end thereof pushes the push plate 1 10, and then pushes the push rod 11 and the push plate 2 12, so that the mold seat 13 moves axially;

[0059] Step S4, converting axial movement into radial contraction: when the mold base 13 moves axially to the exit position of the shell 31, the outer peripheral surface of the mold base 13 slides with the inner wall of the shell 31, and radial contraction is achieved through the guidance of the diameter reduction section 34;

[0060] Step S5, extrusion molding: as the die seat 13 contracts radially, the extrusion die 71 cooperates with the positioning seat 8 to extrude the filter element end until the extrusion die 71 extrude the filter element end onto the end of the filter element;

[0061] Step S6, reset stage: after the extrusion is completed, the telescopic mechanism moves in the reverse direction to return the mold base 13 to the initial position, ready for the next extrusion operation; auxiliary devices such as the permanent magnet 14 or the reset spring 72 are used to help the mold base 13 reset;

[0062] Step S7, taking out the finished product: after the extrusion is completed, take out the processed filter element end and check its quality to ensure that the extrusion molding meets the requirements.

[0063] Compared with the prior art, the extrusion device that radially contracts during axial movement disclosed in the embodiment of the present invention has at least the following beneficial effects:

[0064] 1. Simple structure: By using a telescopic mechanism to synchronously drive multiple extrusion dies 71, the complex structure in which each extrusion head 712 in the traditional extrusion device 3 requires a separate driving mechanism is simplified.

[0065] 2. High working efficiency: Since the telescopic mechanism can synchronously drive multiple extrusion dies 71, the consistency of the extrusion action and the consistency of the force are improved, thereby improving the working efficiency.

[0066] 3. Reduce costs: The mold base 13 and the inner wall of the housing 31 are slidably matched, and the locking section provided on the mold base 13 cooperates with the inclined surface, so that the structure of the extrusion device 3 is standardized. In this way, when it is necessary to process products of different models, it is only necessary to replace the extrusion mold 71, which reduces the difficulty and cost of mold processing.

[0067] 4. Easy to replace the mold: the extrusion mold 71 can be detachably mounted on the mold base 13, making it simple and quick to replace the extrusion mold 71 of different models.

[0068] 5. Improving the service life of the mold: Since the mold base 13 and the inner wall of the shell 31 are slidably matched, the friction between the mold and the shell 31 is reduced, which helps to improve the service life of the mold.

[0069] 6. Strong adaptability: Through the detachable positioning seat 8, it can adapt to the processing requirements of filter elements with different inner diameters, enhancing the adaptability and flexibility of the equipment.

[0070] 7. Easy operation: The extrusion device 3 can be installed on the first support 2 on the processing platform 1, and the installation direction is adjustable, so that the equipment can be quickly adjusted according to the needs of the processed products.

[0071] 8. Stable support: The support device 6 provides stable support and positioning for the filter element, ensuring the coaxial fit between the filter element and the positioning seat 8, improving the processing accuracy, and solving the error problem caused by manual support.

[0072] 9. Magnetic force assisted resetting: A permanent magnet 14 is embedded on the outer peripheral surface of the mold base 13, and the magnetic force is used to assist the mold base 13 in resetting, thereby simplifying the resetting mechanism of the mold base 13.

[0073] 10. Multiple reset methods: In addition to magnetic-assisted reset, other possible reset methods are also provided, such as setting a return spring, setting a magnetic attraction ring in the housing 31, etc., which increases the design flexibility of the device.

[0074] The details not disclosed in the present invention are conventional technical means well known to those skilled in the art.

[0075] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0076] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An extrusion device that contracts radially during axial movement, characterized in that: The invention comprises an extrusion device (3) and a support device (6), wherein the extrusion device (3) comprises a shell (31), the shell (31) is hollow inside, one end of the shell is open, and a positioning seat (8) is provided at the center of the port; a telescopic mechanism is provided inside the shell (31), the telescopic mechanism has a telescopic end coaxial with the positioning seat (8), the telescopic end is circumferentially and evenly connected to a plurality of die seats (13), an extrusion die (71) is detachably mounted on the inner circumference of the die seat (13), and a space circle formed by the plurality of extrusion dies (71) and the positioning seat (8) are coaxial; the outer peripheral surface of the die seat (13) is slidably matched with the inner wall of the shell (31); the shell (31) is provided with a tapered diameter reduction section (34) near the outlet position, which is used to guide the radial contraction of the die seat (13) when it is axially close to the port; the support device (6) is used to support the filter element from the outside of the port of the extrusion device (3) to ensure that the filter element and the positioning seat (8) are coaxially matched; when the multiple extrusion dies (71) are radially contracted, they cooperate with the positioning seat (8) to extrude the end of the filter element.

2. The extrusion device that radially contracts during axial movement according to claim 1, characterized in that: The telescopic end of the telescopic mechanism is fixedly connected to a push plate 1 (10), and a plurality of push rods (11) are evenly connected to the push plate 1 (10) in an annular direction. The end of the push rod (11) away from the telescopic end is fixedly connected to a push plate 2 (12), and the space circle formed by each of the push plates 2 (12) is coaxial with the positioning seat (8), and each of the push plates 2 (12) is radially slidably connected to the mold seat (13) along its space circle.

3. The extrusion device that radially contracts during axial movement according to claim 2, characterized in that: The shell (31) is provided with a baffle plate (32) located between the telescopic mechanism and the positioning seat (8), the baffle plate (32) is fixedly connected with a positioning seat connecting shaft (35), the positioning seat (8) is fixedly connected to one end of the positioning seat connecting shaft (35) extending toward the port of the shell (31), and the baffle plate (32) is provided with a through hole (33) for accommodating the push rod (11) to pass freely.

4. The extrusion device that radially contracts during axial movement according to claim 3, characterized in that: A wedge block (15) is fixedly connected to the inner circumferential surface of each mold seat (13), and a guide sliding seat (36) cooperating with the wedge block (15) is protruded on the circumferential side of the positioning seat connecting shaft (35) to guide the radial expansion of each mold seat (13) when it is reset.

5. The extrusion device that radially contracts during axial movement according to claim 3, characterized in that: The positioning seat (8) is detachably mounted on the end of the positioning seat connecting shaft (35).

6. The extrusion device that radially contracts during axial movement according to claim 2, characterized in that: At least one reset spring (72) is arranged between two adjacent extrusion dies (71), and the reset spring (72) provides power for resetting each extrusion die (71).

7. The extrusion device that radially contracts during axial movement according to claim 1, characterized in that: The extrusion die (71) comprises a die body (711), a die slider (713) is integrally formed in a first direction of the die body (711), the die slider (713) is used to cooperate with the die seat (13), one end of the die body (711) has an extrusion head (712), and the second direction of the extrusion head (712) has an extrusion end (714), and the second direction is opposite to the first direction.

8. The extrusion device that radially contracts during axial movement according to claim 1, characterized in that: It also comprises a processing platform (1), on which a first support (2) is mounted, and the extrusion device (3) is detachably mounted on the first support (2), and the mounting direction of the extrusion device (3) and the first support (2) is adjustable.

9. The extrusion device that radially contracts during axial movement according to claim 8, characterized in that: The support device (6) comprises a second support (61) fixedly connected to the processing platform (1), and two support plates detachably fixed to the second support (61), the two support plates being arranged at an interval, two support rods (66) being connected between the two support plates along the width direction, at least two support seats (67) being detachably installed between the two support rods (66), and the support seats (67) being provided with a limiting groove (68) adapted to the outer diameter of the filter element.

10. The extrusion device that radially contracts during axial movement according to claim 1, characterized in that: There are eight mold seats (13), each of which has a mold body (711) mounted on it, and the eight mold bodies (711) form a complete circle when closed.

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