Cross-section adjustable extrusion die structure

Abstract

The application provides a cross-section adjustable extrusion die structure for extruding a car door frame strip, which comprises a metal framework, glass fiber filaments and a cladding layer, and the extrusion die structure comprises a core die provided with an extrusion opening for extruding the car door frame strip; an input die unit connected to the core die and provided with a feeding channel communicated with the extrusion opening to input the metal framework, the glass fiber filaments and the cladding layer; a variable cross-section model arranged in the extrusion opening and spaced from the inner wall, the variable cross-section model gradually decreases in cross-section size from the direction far from the extrusion opening to the direction close to the extrusion opening, and the side close to the inner wall of the extrusion opening is a slope to extrude a filling part; a transmission assembly slidingly connected to the input die unit along the opening direction of the extrusion opening, and the transmission assembly is connected to the variable cross-section model; and a driving member arranged on the input die unit and connected to the transmission assembly at a driving end to indirectly drive the variable cross-section model to move.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to an extrusion mold structure with an adjustable cross-section. Background Technology

[0002] Automotive door frame sealing strips serve to fill various gaps and joints between automotive body components, providing functions such as shock absorption, waterproofing, dustproofing, sound insulation, and decoration. For example, refer to... Figure 11 The present invention relates to a car door frame strip, which includes a metal frame 1 and a covering layer 2 covering the metal frame 1; wherein the metal frame 1 is a steel strip, which is U-shaped, and glass fiber filaments 11 covered in the covering layer 2 are provided on the inner side of its sealed end; the covering layer 2 is composed of solid adhesive and foam adhesive, and forms an installation part 21 for installation and a hollow filling part 22, wherein the metal frame 1 is located in the installation part 21, and a plurality of locking parts 211 are formed on the inner side of the installation part 21.

[0003] Due to the special assembly requirements of the door frame strip, a thicker wall is needed at the turning points during vehicle loading, resulting in thickening at 22 points of the filler section (see reference). Figure 11 To prevent the door frame strip from collapsing at the corner of the door frame during installation, which would lead to poor sealing after the door is closed and cause defects such as air leakage and water leakage; to solve this problem, the existing process is to add a support strip at the bubble-shaped bend after the door frame strip with a constant cross section is produced, but this production method will lead to a longer production process and an increase in production costs. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an extrusion die structure with an adjustable cross-section, which enables continuous production of door frame sealing strips with adjustable cross-sections, reducing subsequent production processes.

[0005] According to an embodiment of the present invention, an adjustable cross-section extrusion die structure is provided for extruding to form an automotive door frame strip. The automotive door frame strip includes a metal skeleton, glass fiber filaments, and a covering layer. The covering layer includes an mounting portion and a filling portion. The extrusion die structure includes:

[0006] The core mold is equipped with an extrusion port for extruding automotive door frame strips;

[0007] The input mold unit is connected to the core mold and is provided with a feed channel connected to the extrusion port to input the metal skeleton, glass fiber filaments and coating layer;

[0008] A variable cross-section model is set inside the extrusion port and forms a gap with the inner wall. The cross-sectional size of the variable cross-section model gradually decreases from the direction away from the extrusion port to the direction closer to the extrusion port, and the side closer to the inner wall of the extrusion port is an inclined surface to form a filling part by extrusion.

[0009] A transmission assembly is slidably connected to the input mold unit along the direction of the extrusion opening, and the transmission assembly is connected to the variable cross-section model;

[0010] And a driving component, which is set in the input module unit and the driving end is connected to the transmission component to indirectly drive the movement of the variable cross-section model.

[0011] Preferably, the variable cross-section model includes:

[0012] A linear guide block, one end of which is snapped between the core mold and the input mold unit, and the other end extends into the extrusion port;

[0013] And a variable cross-section module, one side of which is slidably connected to a linear guide block along the direction of the extrusion opening, and the other side faces the inner wall of the extrusion and is inclined, and the transmission component is connected to the variable cross-section module.

[0014] Preferably, the transmission assembly includes:

[0015] The sliding sleeve is fixed to both the core mold and the input mold unit;

[0016] The slide rod is slidably connected to the slide sleeve along the direction of the extrusion opening;

[0017] A crossbar moves within the input module unit and is fixed at one end to a slide bar;

[0018] And a vertical rod, parallel to the sliding rod, with one end fixed to the horizontal rod and the other end connected to the variable cross-section model.

[0019] Preferably, the variable cross-section model and the transmission assembly are both provided with an air pipe, one end of which extends out of the variable cross-section model and the other end extends out of the transmission assembly, so as to discharge the gas generated during the extrusion process.

[0020] Preferably, the driving element includes:

[0021] Mounting bracket, installed on the core mold;

[0022] Servo motor, mounted on a mounting bracket;

[0023] The sliding block is slidably connected to the mounting bracket and to the output end of the servo motor;

[0024] The transmission rod is slidably connected to the mounting bracket and one end is fixed to the sliding block;

[0025] And an L-shaped lever, one end of which is rotatably connected to the transmission rod, the middle end of which is rotatably connected to the core mold, and the other end of which is connected to the transmission assembly.

[0026] Preferably, the feeding channel includes a first channel, a second channel, a first flow channel, and a second flow channel arranged sequentially from the inside out and connected to the extrusion port. The first channel inputs glass fiber filaments, the second channel inputs a metal skeleton, the first flow channel and the second flow channel input a coating layer, and the second flow channel is connected to the cavity between the variable cross-section model and the extrusion port.

[0027] Preferably, the mounting portion has multiple card portions formed inside; the input mold unit has a branch channel connected to the first flow channel, and the branch channel is connected to the cavity of the card portion formed by the extrusion port.

[0028] Preferably, the transmission assembly is connected to a mounting plate, and the mounting plate is connected to a plug rod; the core mold and the input mold unit are both provided with plug holes that communicate with the second flow channel, and the plug rod is slidably connected to the plug hole along the opening direction of the extrusion port; the input mold unit is also provided with a venting channel that communicates with the plug hole.

[0029] Preferably, the input mold unit includes an inner mold body and an outer mold body, the first channel and the second channel are disposed in the inner mold body, and the first flow channel and the second flow channel are disposed in the outer mold body. The outer mold body includes a bottom mold body, an intermediate mold body disposed in the bottom mold body, and a top mold body disposed in the intermediate mold body. The transmission component slides between the intermediate mold body and the top mold body.

[0030] Preferably, the inner mold body includes a first inner mold body disposed in the bottom mold body and a second inner mold body disposed in the outer mold body, the second inner mold body being connected to the extrusion port.

[0031] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0032] 1. By setting a variable cross-section model located at the extrusion port, and setting a transmission component connected to the variable cross-section model and a drive component that drives the transmission component to move, the drive component is kept closed when the cross-section of the car door frame strip remains unchanged. When the extrusion size reaches the corner of the car door, the drive component is activated, and the variable cross-section model is indirectly driven to move through the drive component, so that the distance between the inclined side of the variable cross-section model and the inner wall of the extrusion port changes, thereby changing the extrusion space and thus changing the extrusion cross-section of the filling part. This enables continuous production of door frame sealing strips with adjustable cross-sections, reducing subsequent production processes.

[0033] 2. By opening a plug hole and a drain channel connecting the plug hole, and setting a plug rod that slides to the plug hole, when thickening is not required, the variable cross-section module is indirectly driven to move upward under the drive of the drive component, so that the distance between it and the extrusion port is reduced. At this time, the remaining material is retained in the local cavity formed by the second flow channel extending laterally in the lower mold body. While the variable cross-section module moves upward, the plug rod moves upward synchronously, so that the drain channel and the plug hole are connected, and the excess material is discharged from the drain channel to ensure the continuity of mold opening. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the overall structure of the input module unit according to an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of a first partial cross-sectional structure of the input module unit of the present invention;

[0037] Figure 4 yes Figure 3 Enlarged structural diagram of section A in the middle;

[0038] Figure 5 This is a first partial cross-sectional structural diagram of an embodiment of the present invention, mainly showing the installation structure of the plug rod;

[0039] Figure 6 yes Figure 5 Enlarged structural diagram of section B in the middle;

[0040] Figure 7 This is a second partial cross-sectional structural diagram of the input module unit of the present invention, mainly showing the branch channel;

[0041] Figure 8 This is a second partial cross-sectional structural schematic diagram of an embodiment of the present invention, mainly showing the installation structure of the variable cross-section model;

[0042] Figure 9 This is a schematic diagram of the first exploded structure according to an embodiment of the present invention;

[0043] Figure 10 This is a schematic diagram of the second exploded structure according to an embodiment of the present invention;

[0044] Figure 11 This is a cross-sectional view of an automotive door frame strip in related technologies, with the lower image showing the thickened structure of the filler section.

[0045] In the above figures: 1. Metal skeleton; 11. Fiberglass filament; 2. Covering layer; 21. Mounting part; 211. Clip part; 22. Filling part; 3. Core mold; 31. Lower mold body; 32. Upper mold body; 33. Extrusion port; 34. Plug; 4. Inner mold body; 41. First inner mold body; 42. Second inner mold body; 5. Outer mold body; 51. Bottom mold body; 511. Lower bottom mold body; 512. Middle bottom mold body; 513. Upper bottom mold body; 52. Intermediate mold body; 521. Clearance groove; 53. Top mold body; 531. Lower top mold body; 532. Upper top mold body; 533. Drainage channel; 6. Conveying channel; 61. First channel; 62. Second channel; 63. First flow channel; 631. Branch channel; 64. Second flow channel; 7. Variable cross-section model; 71. Straight guide block; 72. Variable cross-section module; 8. Transmission assembly; 81. Sliding sleeve; 82. Sliding rod; 821. Positioning groove; 822. Limiting rod; 83. Horizontal bar; 84. Vertical bar; 85. Air pipe; 86. Mounting plate; 87. Blocking rod; 9. Driving component; 91. Mounting bracket; 92. Servo motor; 93. Sliding block; 94. Transmission rod; 95. L-shaped lever. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following description is provided in conjunction with the appendix. Figure 1-10 The present invention will be further described below; the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0047] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] Reference Figures 1 to 4This invention proposes an adjustable cross-section extrusion die structure for extruding to form an automotive door frame strip. For ease of explanation, as an example, in this invention embodiment, the automotive door frame strip includes a metal skeleton 1, glass fiber filaments 11, and a covering layer 2. The covering layer 2 includes an mounting part 21 and a filling part 22. The metal skeleton 1 is a steel strip, and the covering layer 2 is composed of solid adhesive and foam adhesive. Multiple locking parts 211 are formed inside the mounting part 21.

[0050] In this embodiment of the invention, the cross-section adjustable extrusion die structure includes a core die 3, an input die unit, a variable cross-section die 7, a transmission assembly 8, and a drive component 9; the core die 3 has an extrusion port 33 for extruding and forming an automotive door frame strip; the input die unit is connected to the feed end of the extrusion port 33 of the core die 3 and is provided with a feed channel 6 connected to the extrusion port 33 to input the metal skeleton 1, glass fiber filaments 11, and covering layer 2, which are finally extruded and formed into an automotive door frame strip through the extrusion port 33.

[0051] In this embodiment, the variable cross-section model 7 is disposed at the extrusion port 33 and forms a gap with the inner wall of the extrusion port 33 to extrude through the space between them. The cross-sectional dimension of the variable cross-section model 7 gradually decreases from away from to near the extrusion port 33, and the side near the inner wall of the extrusion port 33 is inclined to form the filling part 22 through extrusion. The transmission component 8 is slidably connected to the input mold unit, and the sliding direction is the opening direction of the extrusion port 33. The transmission component 8 is connected to the variable cross-section model 7 so that the sliding of the transmission component 8 drives the variable cross-section model 7 to slide, thereby changing the gap between the inclined side of the variable cross-section model 7 and the extrusion port 33 and realizing the change of extrusion thickness. The driving component 9 is disposed at the input mold unit, and the driving end is connected to the transmission component 8 to realize the sliding of the transmission component 8 and indirectly drive the variable cross-section model 7 to move.

[0052] In the process of processing extruded automotive door frame strips, a drive component 9 and a transmission assembly 8 are set up. The transmission assembly 8 is used to connect the variable cross-section model 7. When the cross-section of the automotive door frame strip remains unchanged, the drive component 9 is kept closed. When the extrusion size reaches the corner of the vehicle door, the drive component 9 is activated. The drive component 9 indirectly drives the variable cross-section model 7 to move, so that the distance between the inclined side of the variable cross-section model 7 and the extrusion port 33 changes, thereby changing the extrusion space and thus changing the extrusion cross-section of the filling part 22. This enables continuous production of door frame sealing strips with adjustable cross-sections and reduces subsequent production processes.

[0053] Reference Figure 3 In one embodiment of the present invention, the core mold 3 includes a lower mold body 31 and an upper mold body 32 fixed to the lower mold body 31, wherein the lower mold body 31 is provided with an extrusion port 33, and the upper mold body 32 is provided with an opening through which the formed automobile door frame strip passes.

[0054] A plugging hole 34 is vertically through-hole in both the lower mold body 31 and the upper mold body 32. The opening direction of the plugging hole 34 is the same as the opening direction of the extrusion port 33.

[0055] Reference Figures 3 to 10 In one embodiment of the present invention, the input mold unit includes an inner mold body 4 and an outer mold body 5, and a material conveying channel 6 is simultaneously opened in the inner mold body 4 and the outer mold body 5 to convey the material to the extrusion port 33 and extrude it into shape.

[0056] The inner mold body 4 is disposed within the outer mold body 5, and includes a first inner mold body 41 and a second inner mold body 42, each having multiple channels through which materials can pass, and the second inner mold body 42 is connected to the extrusion port 33. The outer mold body 5 includes a bottom mold body 51, an intermediate mold body 52 disposed on the bottom mold body 51, and a top mold body 53 disposed on the intermediate mold body 52.

[0057] The bottom mold body 51 includes a lower bottom mold body 511, a middle bottom mold body 512 and an upper bottom mold body 513. A first inner mold body 41 is disposed in the lower bottom mold body 511, and a second inner mold body 42 is disposed in the middle bottom mold body 512, the upper bottom mold body 513, the middle mold body 52 and the top mold body 53.

[0058] The intermediate mold body 52 is connected to one side of the upper bottom mold body 513, and a clearance groove 521 is provided on the intermediate mold body 52. ​​The top mold body 53 includes a lower top mold body 531 and an upper top mold body 532. The lower top mold body 531 is connected to the intermediate mold body 52, and the upper top mold body 532 is simultaneously connected to the lower top mold body 531 and the first inner mold body 41.

[0059] In one embodiment of the present invention, the feeding channel 6 includes a first channel 61, a second channel 62, a first flow channel 63 and a second flow channel 64 arranged sequentially from the inside to the outside and connected to the extrusion port 33; wherein, the first channel 61 and the second channel 62 are both opened in the first inner mold body 41 and the second inner mold body 42, the first channel 61 is used to input glass fiber filaments 11, and the second channel 62 is used to input metal skeleton 1, the metal skeleton 1 being a steel strip;

[0060] The first flow channel 63 and the second flow channel 64 are used to input the coating layer 2. As one input method, the first flow channel 63 is used to input the solid adhesive, and the second flow channel 64 is used to input the foam adhesive. The first flow channel 63 is formed in the lower bottom mold body 511, the middle bottom mold body 512, and the upper bottom mold body 513. After bending towards the second inner mold body 42 through the upper bottom mold body 513, it connects to the outer wall of the second inner mold body 42 and extends to the extrusion port 33. The second flow channel 64 is formed in sequence in the lower bottom mold body 511, the middle bottom mold body 512, the upper bottom mold body 513, the middle mold body 52, and the top mold body 53. It connects to the extrusion port 33 to extrude and form the opening of the filling part 22, that is, to connect the cavity between the inclined side of the variable cross section model 7 and the extrusion port 33.

[0061] During mold opening, glass fiber filaments 11 are input from the first channel 61, metal skeleton 1 is input from the second channel 62, and simultaneously, solid adhesive is input from the first flow channel 63 and foaming adhesive is input from the second flow channel 64. After the foaming adhesive is input into the cavity between the inclined side of the variable cross-section model 7 and the extrusion port 33, a filling part 22 is formed. During this process, the variable cross-section model 7 is indirectly driven to move by the driving component 9, so that the distance between the inclined side of the variable cross-section model 7 and the extrusion port 33 changes, thereby changing the extrusion cross-section of the filling part 22, realizing the continuous production operation of the door frame sealing strip with adjustable cross-section and reducing subsequent production processes.

[0062] In one embodiment of the present invention, branch channels 631 communicating with extrusion ports 33 are simultaneously provided on the upper bottom mold body 513, the middle mold body 52 and the top mold body 53. One end of the branch channel 631 is open to communicate with the first channel 63, and the other end is open to communicate with the cavity of the card part 211 formed by the extrusion port 33, so as to ensure the formation of the card part 211.

[0063] In one embodiment, the second flow channel 64, located on the side of the lower die 531 near the upper die 532, extends laterally to form a partial cavity for storing the material input through the second flow channel 64. The section of the second flow channel 64 located in the upper die 532 has an inclined opening with the same inclination as the variable cross-section model 7, while the section of the second flow channel 64 located in the lower die 31 has a vertical opening to improve the extrusion effect through the narrowing variation of the opening of the second flow channel 64.

[0064] Reference Figures 5 to 7 In one embodiment of the present invention, the variable cross-section model 7 includes a linear guide block 71 and a variable cross-section module 72. One end of the linear guide block 71 is engaged between the core mold 3 and the upper mold body 532 of the input mold unit, and the other end extends into the extrusion port 33. One side of the variable cross-section module 72 is slidably connected to the linear guide block 71 along the opening direction of the extrusion port 33, and the other side faces the inner wall of the extrusion port 33 and is inclined. The transmission assembly 8 is connected to the variable cross-section module 72.

[0065] As a sliding method, a dovetail groove or a stepped groove is provided on the variable cross-section module 72, and a linear guide block 71 is formed with a slider that is adapted to and slidably connected to the dovetail groove or stepped groove, so as to realize the installation and sliding of the variable cross-section module 72.

[0066] Reference Figures 1 to 4 In one embodiment of the present invention, the transmission assembly 8 includes a sliding sleeve 81, a sliding rod 82, a horizontal rod 83, and a vertical rod 84; the sliding sleeve 81 is fixed to both the lower mold body 31 and the top mold body 53, and a sliding hole is provided through the sliding sleeve 81; the sliding rod 82 is adapted to and slidably connected to the sliding hole of the sliding sleeve 81, and one end extends into the relief groove 521.

[0067] The horizontal bar 83 is located in the inner clearance groove 521, with one end fixed to the slide bar 82 and the other end extending laterally. The vertical bar 84 is set parallel to the slide bar 82, with one end fixed to the other end of the horizontal bar 83. The other end of the vertical bar 84 is slidably connected to the upper mold body 532 and fixed to the variable cross-section module 72 of the variable cross-section model 7. Under the drive of the driving component 9, the sliding sleeve 81, slide bar 82, horizontal bar 83 and vertical bar 84 move simultaneously, and the variable cross-section module 72 moves toward the opening direction of the extrusion port 33, thus completing the change of the final product thickness.

[0068] A positioning groove 821 is provided on the side wall of the slide rod 82. A limit rod 822 is provided on the slide rod 82 to prevent the slide rod 82 from sliding downwards beyond its designated position.

[0069] In one embodiment, air pipes 85 are provided on the slide bar 82, the cross bar 83, and the vertical bar 84. One end of the air pipe 85 extends out of the variable cross-section module 72, and the other end extends out of the slide bar 82, so as to discharge the gas generated during the extrusion process through the air pipe 85. The end of the air pipe 85 that extends out of the variable cross-section module 72 exceeds the extrusion port 33 and is threaded with a nut to maintain the installation position.

[0070] Reference Figures 5 to 7 In one embodiment, the plug 34 is connected to a local cavity formed by the laterally extending second flow channel 64 in the lower top mold body 531, so that the material in the local cavity can flow into the plug 34.

[0071] A mounting plate 86 is also fixed on the slide bar 82. The mounting plate 86 is connected to a plug rod 87. The plug rod 87 is a screw rod that is threadedly connected to the mounting plate 86. One end of the plug rod 87 extends into the plug hole 34 and extends towards the local cavity formed by the second flow channel 64 opened in the lower top mold body 531, so as to block the plug hole 34.

[0072] In this embodiment, drainage channels 533 are simultaneously provided on the lower mold body 531 and the upper mold body 532. The inlet of the drainage channel 533 is connected to the side wall of the plug hole 34, and the outlet opens downward from the lower side of the lower mold body 531.

[0073] Within a unit of time, the amount of glue injected into one channel of the mold is equal, that is, within a unit of time, the amount of glue injected into the second flow channel 64 is equal. To ensure that when the amount of glue needed to thicken the filling part 22 is required, the amount of glue injected into the second flow channel 64 per unit time is the amount of glue required to thicken the filling part 22; when thickening is not required, the variable cross-section module 72 is indirectly driven to move upward under the drive of the drive component 9, so that the distance between it and the extrusion port 33 becomes smaller. At this time, the remaining material accumulates in the second flow channel 64 extending laterally into the local cavity formed by the lower top mold body 531. While the variable cross-section module 72 moves upward, the plug rod 87 moves upward simultaneously, so that the drain channel 533 and the plug hole 34 are connected, and the excess material is discharged from the drain channel 533 to ensure the continuity of mold opening.

[0074] Reference Figure 1 and Figure 2 According to an embodiment of the present invention, the cross-section adjustable extrusion die structure includes a driving component 9 comprising a mounting frame 91, a servo motor 92, a sliding block 93, a transmission rod 94, and an L-shaped lever 95. The mounting frame 91 is mounted on the upper die body 32 of the core die 3. The servo motor 92 is mounted on the mounting frame 91. The sliding block 93 is slidably connected to the mounting frame 91 and connected to the output end of the servo motor 92 via a ball screw, so as to achieve sliding under the action of the servo motor 92. The transmission rod 94 is slidably connected to the mounting frame 91 and one end is fixed to the sliding block 93.

[0075] One end of the L-shaped lever 95 is rotatably connected to the other end of the transmission rod 94, the middle end is rotatably connected to the upper mold body 32 of the core mold 3, and the other end is adapted to and extends into the positioning groove 821 on the side wall of the slide rod 82.

[0076] During use, the ball screw and servo motor 92 cause the sliding block 93 to slide, which in turn causes the L-shaped lever 95 to rotate relative to its central rotating part. The end of the L-shaped lever 95 that extends into the positioning groove 821 drives the slide rod 82 to move vertically. During use, the pulse equivalent of the encoder in the servo motor 92 and the lead of the ball screw can be set to indirectly achieve precise control of the movement distance of the slide rod 82 and prevent the L-shaped lever 95 from disengaging from the slide rod 82.

[0077] In another embodiment, the drive component 9 can be a linear drive component such as an electric cylinder, a pneumatic cylinder, a ball screw, or a nut screw, which is connected to the slide rod 82 via a connecting rod and drives the slide rod 82 to move.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A cross-section adjustable extrusion die structure for extrusion forming an automobile door frame strip, the automobile door frame strip comprising a metal skeleton (1), glass fiber filaments (11) and a cladding layer (2), the cladding layer (2) comprising a mounting portion (21) and a filling portion (22), characterized in that, The extrusion die structure includes: The core mold (3) includes a lower mold body (31) and an upper mold body (32) fixed to the lower mold body (31), wherein the lower mold body (31) is provided with an extrusion port (33) for extruding the car door frame strip. The input mold unit is connected to the core mold (3) and is provided with a feed channel (6) connected to the extrusion port (33) to input the metal skeleton (1), glass fiber filament (11) and the covering layer (2). A variable cross-section model (7) is set inside the extrusion port (33) and forms a gap with the inner wall of the extrusion port (33). The cross-sectional size of the variable cross-section model (7) gradually decreases from the direction away from the extrusion port (33) to the direction of extrusion to form a filling part (22). The variable cross-section model (7) includes: a straight guide block (71), one end of which is snapped between the core mold (3) and the input mold unit, and the other end of which extends into the extrusion port (33); and a variable cross-section module (72), one side of which is slidably connected to the straight guide block (71) along the opening direction of the extrusion port (33), and the other side faces the inner wall of the extrusion port (33) and is inclined. The input mold unit includes an inner mold body (4) and an outer mold body (5), and the material conveying channel (6) is opened in both the inner mold body (4) and the outer mold body (5); the material conveying channel (6) includes a first channel (61), a second channel (62), a first flow channel (63) and a second flow channel (64) arranged sequentially from the inside to the outside and connected to the extrusion port (33). The first channel (61) inputs glass fiber filaments (11), the second channel (62) inputs metal skeleton (1), the first flow channel (63) and the second flow channel (64) input a covering layer (2), and the second flow channel (64) is connected to the cavity between the variable cross section model (7) and the extrusion port (33); The outer mold body (5) includes a bottom mold body (51), an intermediate mold body (52) disposed on the bottom mold body (51), and a top mold body (53) disposed on the intermediate mold body (52). The intermediate mold body (52) is provided with a relief groove (521). The top mold body (53) includes a lower top mold body (531) and an upper top mold body (532). The lower mold body (31), the upper mold body (32), and the upper top mold body (532) are also provided with vertically penetrating plug holes (34). The opening direction of the plug holes (34) is the same as the opening direction of the extrusion port (33). The lower top mold body (531) and the upper top mold body (532) are both provided with drainage channels (533). The inlet of the drainage channel (533) is connected to the side wall of the plug hole (34), and the outlet opens downward from the lower side of the lower top mold body (531). The transmission assembly (8) is slidably connected to the input mold unit along the opening direction of the extrusion port (33); the transmission assembly (8) includes a sliding sleeve (81), a sliding rod (82), a horizontal rod (83), and a vertical rod (84); the sliding sleeve (81) is fixed to both the lower mold body (31) and the top mold body (53), and a sliding hole is provided through the sliding sleeve (81); the sliding rod (82) is slidably connected to the sliding hole of the sliding sleeve (81), and one end extends into the relief groove (521); the horizontal rod (83) is located in the relief groove (521), and one end is fixed to the sliding rod (82), while the other end extends laterally; the vertical rod (84) is set parallel to the sliding rod (82), and one end is fixed to the other end of the horizontal rod (83), while the other end is connected to the variable cross-section module (72). The slide bar (82) is also fixedly connected to a mounting plate (86), and the mounting plate (86) is connected to a plug rod (87); the plug hole (34) is connected to the second flow channel (64); the plug rod (87) is slidably connected to the plug hole (34) along the opening direction of the extrusion port (33). And a drive unit (9) is provided on the core mold (3), and the drive end is connected to the transmission assembly (8) to indirectly drive the variable cross section model (7) to move.

2. A cross-section adjustable extrusion die structure according to claim 1, wherein The variable cross-section model (7) and the transmission assembly (8) are both equipped with air pipes (85), one end of which extends out of the variable cross-section model (7) and the other end extends out of the transmission assembly (8) to discharge the gas generated during the extrusion process.

3. The cross-section adjustable extrusion die structure according to claim 1, characterized in that, The driving component (9) includes: Mounting bracket (91) is installed on core mold (3); Servo motor (92) is mounted on mounting bracket (91); The sliding block (93) is slidably connected to the mounting bracket (91) and connected to the output end of the servo motor (92); The transmission rod (94) is slidably connected to the mounting bracket (91) and one end is fixed to the sliding block (93). And an L-shaped lever (95), one end of which is rotatably connected to the transmission rod (94), the middle end of which is rotatably connected to the core mold (3), and the other end of which is connected to the transmission assembly (8).

4. The cross-section adjustable extrusion die structure according to claim 1, characterized in that, The mounting part (21) has a plurality of card parts (211) formed inside; the input module unit is provided with a branch channel (631) connected to the first flow channel (63), and the branch channel (631) is connected to the cavity of the card part (211) formed by the extrusion port (33).

5. The cross-section adjustable extrusion die structure according to claim 1, characterized in that, The first channel (61) and the second channel (62) are disposed in the inner mold body (4), and the first flow channel (63) and the second flow channel (64) are disposed in the outer mold body (5).

6. The cross-section adjustable extrusion die structure according to claim 1, characterized in that, The inner mold body (4) includes a first inner mold body (41) disposed in the bottom mold body (51) and a second inner mold body (42) disposed in the outer mold body (5), the second inner mold body (42) being connected to the extrusion port (33).

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