Automobile door sill injection mold

Abstract

An injection mold for an automotive door sill includes an upper plate and a lower plate. A runner plate is located beneath the upper plate, and a fixed mold plate is positioned below the runner plate. Mold feet are located on the lower plate, and an ejector plate is positioned on the lower plate between the mold feet. The ejector plate is driven by a power source and has ejector rods. A movable mold plate is positioned on the mold feet. A long, injection-molded automotive door sill is formed between the movable and fixed mold plates. A linked core-pulling device is provided on the movable mold plate, and a combined straight-ejector and angled-ejector core-pulling device is provided on the ejector plate and the movable mold plate. Through the linked core-pulling device and the combined straight-ejector and angled-ejector core-pulling device, the various ribs and grooves on the plastic product can be smoothly pulled out of the mold, ensuring that the plastic product can be smoothly ejected, avoiding product deformation due to forced ejection, and improving product yield and production efficiency.

Description

Technical Field

[0001] This invention relates to injection molds, and more particularly to an injection mold for an automotive door sill. Background Technology

[0002] When producing plastic parts using injection molds, if the plastic part is a long, narrow car door sill, it may have A-pillar lower surround, front door sill, B-pillar lower surround, rear door sill, and C-pillar lower surround. The B-pillar lower surround has a protruding vertical plate with inwardly sloping baffles on both sides. The baffles and the inner walls of the vertical plate have integrally connected transverse reinforcing ribs. These transverse reinforcing ribs prevent the product from being directly ejected upwards for demolding. A side-pull slider is needed to pull out the transverse reinforcing ribs laterally. However, the inwardly sloping baffles on both sides interfere with the side-pull slider's pulling action. Existing methods typically involve reducing the baffle's tilt angle (85°–90°) and then using the elasticity of the plastic material to forcefully pull the side-pull slider out of the baffles. However, reducing the baffle's tilt angle affects the clamping force between the baffle and its fitting. Forced ejection can easily deform plastic parts, affecting the yield rate. Furthermore, the upper part of the C-pillar lower surround has protruding vertical plates with horizontal baffles and fixing holes. The inner wall of the C-pillar lower surround has vertical reinforcing ribs, an upper fixing plate, and a lower fixing plate. Each of the upper and lower fixing plates has a protruding cross-shaped pin. A reinforcing plate is located between the upper part of the lower fixing plate and the inner wall of the C-pillar lower surround. A recess is formed on the outer wall of the C-pillar lower surround. These structures—baffles, fixing holes, vertical reinforcing ribs, cross-shaped pins, and recesses—interfere with the core-pulling and demolding direction of the plastic part, preventing the injection mold from directly ejecting the plastic part. This leads to demolding difficulties, forcing the plastic part to be ejected by relying on the elasticity of the plastic material. This easily causes deformation or even breakage of the plastic part, resulting in a low yield rate and reduced production efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an automotive door sill injection mold that enables plastic parts to be easily demolded, ensuring a high yield and production efficiency.

[0004] The technical solution of the present invention for an injection mold of an automobile door sill is as follows: It includes an upper plate and a lower plate. A runner plate is located under the upper plate, and a fixed template is set under the runner plate. Mold feet are set on the lower plate, and an ejector plate is set on the lower plate between the mold feet. The ejector plate is driven by a power source and has ejector rods. A movable template is set on the mold feet. A long, strip-shaped automobile door sill is formed between the movable template and the fixed template. The long, strip-shaped automobile door sill includes an A-pillar lower surround, a front door sill, a B-pillar lower surround, a rear door sill, and a C-pillar lower surround. The B-pillar lower surround has an upward-facing vertical plate, and inwardly inclined baffles are formed on both sides of the vertical plate. A transverse reinforcing rib is formed between the baffles and the inner wall of the vertical plate. The C-pillar lower surround has a protruding vertical piece at the top, and a transverse baffle is formed on the vertical piece. A fixed... The inner wall surrounding the C-pillar has vertical reinforcing ribs, an upper fixing plate, and a lower fixing plate. Each of the upper and lower fixing plates has a protruding cross-shaped pin. A reinforcing plate is formed between the upper part of the lower fixing plate and the inner wall of the elongated car door sill. A recess is formed on the outer wall surrounding the C-pillar. A linkage core-pulling device is provided on the moving template, and a combined straight-push and angled-push core-pulling device is provided on the ejector plate and the moving template. The linkage core-pulling device includes a side slide block, which is fixed to the moving template. A limit seat, a sliding plate, and a side core-pulling slider are provided on the side slide block. The limit seat is fixed to the side slide block by fasteners. The lower part of the sliding plate slides in conjunction with the side slide block. An angled slide block is provided on the sliding plate, which is fixed to the sliding plate. An angled slider is provided in the angled slide block, and the angled slider slides with the angled slide block. The inclined slider is connected to the inclined push rod. The side wall of the side core-pulling slider has an inclined push groove, and an inclined push seat is provided in the inclined push groove. The inclined push seat cooperates with the inner wall of the baffle and the transverse reinforcing rib. The inclined push rod passes through the sliding plate and the side core-pulling slider and connects to the inclined push seat. A side-pulling oil cylinder is provided below the side sliding seat. The piston rod of the side-pulling oil cylinder is connected to the pull rod, and the pull rod is connected to the side core-pulling slider. The straight push and inclined push combined ejection core-pulling device includes a first straight push pin, a first sliding seat, a second sliding seat, and a second straight push pin provided on the push pin plate. The first straight push pin, the first sliding seat, the second sliding seat, and the second straight push pin are respectively fixed to the push pin plate by fasteners. A first straight push block is provided on the first straight push pin. The first straight push block has a lower rib groove and a lower pin groove. The lower rib groove is connected to the lower part of the vertical reinforcing rib. The first slide block has a first slider that slides within it. A first inclined pin is mounted on the first slider, and a first inclined block is mounted on the first inclined pin. The first inclined pin has a first inclined block with a convex hole, an upper left pin groove, an upper rib groove, an upper plate groove, and an inner groove. The convex hole mates with the fixing hole of the vertical plate, the upper rib groove mates with the upper part of the vertical reinforcing rib, the upper plate groove mates with the reinforcing plate, and the inner groove mates with the inner wall of the recess. The second slide block has a second slider that slides within it. A second inclined pin is mounted on the second slider, and a second inclined block is mounted on the second inclined pin. The second inclined block has an outer groove that mates with the outer wall of the recess.The second straight pin is provided with a second straight pin block, and the second straight pin block has an upper right pin groove. The upper right pin groove and the upper left pin groove cooperate with the cross-shaped pin under the upper fixing plate.

[0005] Furthermore, the inclined push rod has a circulating cooling water hole, a cooling water pipe is installed in the circulating cooling water hole, and an inner cooling water hole is made in the cooling water pipe. A top block cooling water hole is made in the inclined push seat, and the inner cooling water hole communicates with the top block cooling water hole.

[0006] The beneficial effects of this invention's automotive door sill injection mold are as follows: First, inclined ejector grooves are formed on both sides of the side core-pulling slider, and inclined ejector seats are set in the inclined ejector grooves, which reduces the outer diameter of the side core-pulling slider on both sides. When the mold opens, the side core-pulling slider with reduced outer diameter on both sides can smoothly slide outward to pull out the lower B-pillar surround of the long strip-shaped automotive door sill. While the side core-pulling slider slides outward, it drives the inclined ejector rod and inclined ejector seat to move laterally, causing the inclined ejector seat to disengage from the small angle between the vertical plate and the baffle and the lateral reinforcing rib, thereby ensuring that the long strip-shaped automotive door sill can be demolded smoothly and avoiding product deformation due to forced demolding. First, it improves the product yield and production efficiency. Second, it utilizes a smaller space by combining four ejection structures—the first straight ejector block, the first angled ejector block, the second angled ejector block, and the second straight ejector block—into one arrangement within the mold. This arrangement occupies less space. When ejecting the long car door sill, the first angled ejector block and the second angled ejector block first move at an angle to disengage from the C-pillar surrounding the long car door sill. Then, the ejector rod, the first straight ejector block, and the second straight ejector block together push the long car door sill upwards to demold, allowing the various ribs and groove structures on the plastic product to be easily pulled out of the mold and ensuring that the plastic product can be ejected smoothly. Attached Figure Description

[0007] Figure 1 This is a structural schematic diagram of an automotive door sill injection mold according to the present invention;

[0008] Figure 2 yes Figure 1 A schematic diagram of the cross-section along the A-A direction;

[0009] Figure 3 It is a 3D diagram of a long, narrow car door sill;

[0010] Figure 4 This is a three-dimensional schematic diagram showing the coordinated state of the moving template, the long car door sill, and the linkage core-pulling device.

[0011] Figure 5 This is a three-dimensional schematic diagram of the linkage core-pulling device;

[0012] Figure 6 It is a three-dimensional schematic diagram of the working state of the side slide seat, limit seat, sliding plate, inclined slide seat, inclined top seat, inclined top rod, side oil cylinder and tie rod;

[0013] Figure 7 This is a top view of the linkage core-pulling device;

[0014] Figure 8 yes Figure 7 Schematic diagram of the cross section in the B-B direction;

[0015] Figure 9 This is a three-dimensional schematic diagram of a side-pulling slider;

[0016] Figure 10 This is a 3D schematic diagram of the area surrounding the B-pillar;

[0017] Figure 11 It is a three-dimensional schematic diagram of the combined ejector core-pulling device of a long strip-shaped car door sill, ejector plate, and straight and angled ejector.

[0018] Figure 12 This is a three-dimensional schematic diagram of a combined straight-top and angled-top ejector core-pulling device;

[0019] Figure 13 This is a 3D schematic diagram of the first vertical block;

[0020] Figure 14 This is a three-dimensional schematic diagram of the first inclined block;

[0021] Figure 15 This is a three-dimensional schematic diagram of the second inclined block;

[0022] Figure 16 This is a three-dimensional schematic diagram of the second straight-acting block;

[0023] Figure 17 This is a frontal 3D view of the area surrounding the C-pillar;

[0024] Figure 18 This is a 3D view of the rear of the C-pillar surround. Implementation

[0025] This invention relates to an injection mold for automotive door sills, such as... Figure 1 — Figure 18As shown, the system includes an upper cover plate 1 and a lower cover plate 2. A runner plate 3 is located under the upper cover plate, and a fixed template 4 is positioned below the runner plate. Mold feet 5 are positioned on the lower cover plate, and an ejector plate 6 is positioned on the lower cover plate between the mold feet. The ejector plate is driven by a power source and has ejector rods 7. A movable template 8 is positioned on the mold feet 5. Between the movable template and the fixed template 4, there is a long, injection-molded car door sill 9. The long, elongated car door sill 9 includes an A-pillar lower surround 91, a front door sill 92, a B-pillar lower surround 93, a rear door sill 94, and a C-pillar lower surround 95. The B-pillar lower surround 93 has an upward-facing vertical plate 96, and inwardly inclined baffles 97 are formed on both sides of the vertical plate. A transverse reinforcing rib 98 is formed between the baffles and the inner walls of the vertical plate. The C-pillar lower surround 95 has a protruding section at the top. A vertical plate 99 has a horizontal baffle 100 on it and a fixing hole 101 in it. The inner wall of the C-pillar lower enclosure 95 has a vertical reinforcing rib 102, an upper fixing plate 103, and a lower fixing plate 104. A protruding cross-shaped pin 105 is formed under each of the upper and lower fixing plates. A reinforcing plate 106 is formed between the upper part of the lower fixing plate and the inner wall of the elongated car door sill. A recess 107 is formed on the outer wall of the C-pillar lower enclosure 95. A linkage core-pulling device is provided on the moving template 8, and a straight-top and inclined-top combined ejection core-pulling device is provided on the ejector plate 6 and the moving template 8. The linkage core-pulling device includes a side sliding seat 15, which is fixed to the moving template. A limiting seat 14, a sliding plate 16, and a side core-pulling slider 17 are provided on the side sliding seat 15. 14 is fixed to the side slide block 15 by fasteners. The lower part of the sliding plate slides in cooperation with the side slide block. An inclined slide block 18 is provided on the sliding plate and is fixed to the sliding plate. An inclined slider 19 is provided in the inclined slide block and slides in cooperation with the inclined slide block. The inclined slider is connected to the inclined push rod 20. The side wall of the side core-pulling slider 17 is provided with an inclined top groove 21. An inclined top seat 22 is provided in the inclined top groove. The inclined top seat 22 cooperates with the inner wall of the baffle 97 and the transverse reinforcing rib 98. The inclined push rod 20 passes through the sliding plate 16 and the side core-pulling slider 17 and connects to the inclined top seat 22. A side core-pulling cylinder 23 is provided below the side slide block 15. The piston rod of the side core-pulling cylinder is connected to the pull rod 24. The pull rod is connected to the side core-pulling slider 17. The straight-push and inclined-push combined ejection core-pulling device includes A first straight ejector pin 30, a first slide block 40, a second slide block 50, and a second straight ejector pin 60 are provided on the ejector plate 6. The first straight ejector pin 30, the first slide block 40, the second slide block 50, and the second straight ejector pin 60 are respectively fixed to the ejector plate 6 by fasteners. A first straight ejector block 31 is provided on the first straight ejector pin 30. The first straight ejector block has a lower rib groove 32 and a lower pin groove 33. The lower rib groove 32 cooperates with the lower part of the vertical reinforcing rib 102. The lower pin groove 33 cooperates with the lower part of the lower fixing piece 104 and one side of the cross-shaped pin 105. A first slider 41 is provided in the first slide block 40. The first slider slides in cooperation with the first slide block. A first oblique ejector pin 42 is provided on the first slider. A first oblique ejector block 43 is provided on the first oblique ejector pin 42.The first inclined push block has a protruding hole 44, an upper left pin groove 45, an upper rib groove 46, an upper plate groove 47, and an inner groove 48. The protruding hole 44 mates with the fixing hole 101 of the vertical plate 99. The upper rib groove 46 mates with the upper part of the vertical reinforcing rib 102. The upper plate groove 47 mates with the reinforcing plate 106. The inner groove 48 mates with the inner wall of the recess 107. The second slide block 51 is provided in the second slide block 50. The second slide block slides with the second slide block. The second inclined push pin 52 is provided on the second slide block. The second inclined push pin 52 is provided with a second inclined push block 53. The second inclined push block has an outer groove 54, which mates with the outer wall of the recess 107. The second straight push pin 60 has a second straight push block 61, which has an upper right pin groove 62. The upper right pin groove and the upper left pin groove mate with the cross-shaped pin 105 under the upper fixing plate 103.

[0026] Furthermore, the inclined push rod 20 has a circulating cooling water hole 25, a cooling water pipe 26 is installed in the circulating cooling water hole, and an inner cooling water hole 27 is installed in the cooling water pipe. A top block cooling water hole 28 is installed in the inclined push seat 22, and the inner cooling water hole communicates with the top block cooling water hole. One end of the inclined push rod 20 can be connected to a connector, which connects to the cooling water inlet. With the circulating cooling water hole 25, the inner cooling water hole 27, and the top block cooling water hole 28, cooling water can circulate in the inclined push rod 20 and the inclined push seat 22, effectively cooling the interior of the inclined push seat and improving the cooling efficiency of the plastic part.

[0027] This invention discloses an injection mold for a car door sill. After the elongated car door sill 9 is injection molded, the lower cover plate 2 drives the mold feet 5, ejector plate 6, moving mold plate 8, and elongated car door sill 9 to move downwards together, while the upper cover plate 1, runner plate 3, and fixed mold plate 4 remain stationary. The mold opens from the fixed mold plate 4 and moving mold plate 8. Then, the piston rod of the side-pulling cylinder 23 drives the pull rod 24 to move outwards. The pull rod pulls the side core-pulling slider 17 to slide outwards along the side slide seat 15, while the sliding plate 16 and the inclined slide seat 18 remain stationary, so that the inclined ejector seat 22 first abuts against the inner wall of the baffle 97 of the elongated car door sill 9, and then the side core-pulling... As slider 17 moves outward, the inclined hole inside the side core-pulling slider engages with the inclined push rod 20, causing the inclined push rod to gradually move laterally to one side. One end of the inclined push rod moves laterally along the inclined slide block 18 via the inclined slider 19, while the other end of the inclined push rod causes the inclined push block 22 to move laterally, pulling out the angle between the baffle 97 and the vertical plate 96, as well as the transverse reinforcing rib 98. At this time, the side core-pulling slider 17 moves outward and contacts the sliding plate 16. The side core-pulling slider causes the sliding plate 16 to slide outward along the side slide block 15. The sliding plate 16 drives the inclined slide block 18, the inclined slider 19, the inclined push rod 20, and the inclined push block 22, which completes the transverse core-pulling. 2. Move outwards together to allow it to smoothly disengage from the B-pillar underbody 93 of the long car door sill 9. At this time, the ejector plate 6 is driven upwards by the power, and the ejector plate 6 drives the ejector rod 7, the first straight ejector 30, the first slide block 40, the second slide block 50, and the second straight ejector 60 to move upwards together. The first straight ejector 30 drives the first straight ejector block 31 to move upwards in a straight line. The first slide block 40 drives the first slider 41, the first oblique ejector 42, and the first oblique ejector block 43 to move upwards. The second slide block 50 drives the second slider 51, the second oblique ejector 52, and the second oblique ejector block 53 to move upwards. The second straight ejector 60 drives the second... The straight ejector block 61 moves upward in a straight line, and the ejector rod 7, the first straight ejector block 31 and the second straight ejector block 61 push the injection-molded elongated car door sill 9 upward in a straight line. Meanwhile, the first inclined ejector pin 42 drives the first inclined ejector block 43 to gradually tilt to one side, so that the first inclined ejector block 43 gradually disengages from the fixing hole 101, the vertical reinforcing rib 102, the reinforcing plate 106, the inner wall of the recess 107 and the left side structure of the cross-shaped pin 105 of the upper fixing plate 103 on the vertical plate 99. Meanwhile, the second inclined ejector pin 52 drives the second inclined ejector block 53 to disengage from the outer wall of the recess 107. At this time, the elongated car door sill 9 can be ejected upward and demolded.This solution provides an injection mold for a car door sill. Firstly, inclined ejector grooves 21 are formed on both sides of the side core-pulling slider 17, and inclined ejector seats 22 are installed in the inclined ejector grooves. This reduces the outer diameter of the side core-pulling slider on both sides. When the mold opens, the side core-pulling slider with its reduced outer diameter can smoothly slide outwards to pull out the B-pillar lower surround 93 of the elongated car door sill 9. Simultaneously, the side core-pulling slider slides outwards, causing the inclined ejector rod 20 and the inclined ejector seat 22 to move laterally. This causes the inclined ejector seat 22 to disengage from the small angle between the vertical plate 96 and the baffle 97, as well as the transverse reinforcing rib 98, thus ensuring smooth demolding of the elongated car door sill 9 and preventing product deformation due to forced demolding, thereby improving efficiency. The product yield and production efficiency; secondly, by utilizing a smaller space, the four ejection structures—the first straight ejector block 31, the first inclined ejector block 43, the second inclined ejector block 53, and the second straight ejector block 61—are arranged together in the mold, occupying less space. When ejecting the long car door sill 9, the first inclined ejector block 43 and the second inclined ejector block 53 first move at an angle to disengage from the lower C-pillar enclosure 95 of the long car door sill 9. Then, the ejector rod 7, the first straight ejector block 31, and the second straight ejector block 61 together eject the long car door sill 9 upwards to demold, allowing the various ribs and groove structures on the plastic product to be easily pulled out and demolded, ensuring that the plastic product can be ejected smoothly.

Claims

1. An injection mold for a car door sill, comprising an upper plate (1) and a lower plate (2), a runner plate (3) under the upper plate, a fixed template (4) under the runner plate, a mold foot (5) on the lower plate, an ejector plate (6) between the mold feet on the lower plate, the ejector plate being driven by a power source, an ejector rod (7) on the ejector plate, a movable template (8) on the mold foot (5), and an injection-molded elongated car door sill (9) between the movable template and the fixed template (4), the elongated car door sill (9) comprising an A-pillar lower surround (91), a front door sill (92), a B-pillar lower surround (93), a rear door sill (94), and a C-pillar lower surround (95), the B-pillar lower surround (93) having an upward-facing vertical plate. (96) An inwardly inclined baffle (97) is provided on both sides of the vertical plate, and a transverse reinforcing rib (98) is provided between the baffle and the inner wall of the vertical plate. The lower surround of the C-pillar (95) is provided with a protruding vertical piece (99) on the upper part, and a transverse baffle (100) is provided on the vertical piece. A fixing hole (101) is provided in the vertical piece. The inner wall of the lower surround of the C-pillar (95) is provided with a vertical reinforcing rib (102), an upper fixing piece (103) and a lower fixing piece (104). A protruding cross-shaped pin (105) is provided under the upper and lower fixing pieces respectively. A reinforcing piece (106) is provided between the upper part of the lower fixing piece and the inner wall of the long strip-shaped car door sill. A recess (107) is provided on the outer wall of the lower surround of the C-pillar (95). The feature is: The moving template (8) is provided with a linkage core-pulling device, and the ejector plate (6) and the moving template (8) are provided with a straight-top and inclined-top combined ejector core-pulling device. The linkage core-pulling device includes a side slide seat (15), which is fixed to the moving template. A limit seat (14), a sliding plate (16) and a side core-pulling slider (17) are provided on the side slide seat (15). The limit seat (14) is fixed to the side slide seat (15) by fasteners. The lower part of the sliding plate is slidably engaged with the side slide seat. An inclined slide seat (18) is provided on the sliding plate, which is fixed to the sliding plate. An inclined slider (19) is provided in the inclined slide seat, which is slidably engaged with the inclined slide seat. The inclined slider is connected to an inclined top rod (20). The side wall of the side core-pulling slider (17) is provided with an inclined top groove (21). The groove is provided with an inclined top seat (22), which cooperates with the inner wall of the baffle (97) and the transverse reinforcing rib (98). The inclined top rod (20) passes through the sliding plate (16) and the side core-pulling slider (17) and connects to the inclined top seat (22). A side oil-pulling cylinder (23) is provided below the side slide (15). The piston rod of the side oil-pulling cylinder is connected to the pull rod (24), and the pull rod is connected to the side core-pulling slider (17). The straight-top and inclined-top combined ejection core-pulling device includes a first straight ejector (30), a first slide (40), a second slide (50), and a second straight ejector (60) provided on the ejector plate (6). The first straight ejector (30), the first slide (40), the second slide (50), and the second straight ejector (60) are respectively fastened to and The ejector plate (6) is fixed together. The first straight ejector (30) is provided with a first straight ejector block (31). The first straight ejector block is provided with a lower rib groove (32) and a lower pin groove (33). The lower rib groove (32) cooperates with the lower part of the vertical reinforcing rib (102). The lower pin groove (33) cooperates with the lower part of the lower fixing piece (104) and one side of the cross-shaped pin (105). The first slide block (41) is provided in the first slide block (40). The first slide block is slidably engaged with the first slide block. The first oblique ejector (42) is provided on the first oblique ejector (42). The first oblique ejector block (43) is provided on the first oblique ejector (42). The first oblique ejector block is provided with a protruding hole block (44), an upper left pin groove (45), an upper rib groove (46), an upper piece groove (47), and an inner groove (48). The convex hole block (44) is matched with the fixing hole (101) of the vertical piece (99), the upper rib groove (46) is matched with the upper part of the vertical reinforcing rib (102), the upper piece groove (47) is matched with the reinforcing piece (106), the inner groove (48) is matched with the inner wall of the recess (107), the second slide block (51) is provided in the second slide block (50), the second slide block is slidably matched with the second slide block, the second slide block is provided with the second oblique pin (52), the second oblique pin (52) is provided with the second oblique pin (52), the second oblique pin (52) is provided with the second oblique block (53), the second oblique pin (53) is provided with the outer groove (54), the outer groove is matched with the outer wall of the recess (107), the second straight pin (60) is provided with the second straight pin (61), the second straight pin (61) is provided with the upper right pin groove (62).The upper right and upper left pin slots cooperate with the cross-shaped pin (105) under the upper fixing plate (103). The inclined top rod (20) has a circulating cooling water hole (25), a cooling water pipe (26) is installed in the circulating cooling water hole, and an inner cooling water hole (27) is made in the cooling water pipe. The inclined top seat (22) has a top block cooling water hole (28), and the inner cooling water hole is connected to the top block cooling water hole. After the long strip car door sill (9) is injection molded, the lower cover plate (2) The mold base (5), ejector plate (6), moving mold plate (8), and long car door sill (9) move downwards together, while the upper cover plate (1), runner plate (3), and fixed mold plate (4) remain stationary. The mold opens from the fixed mold plate (4) and moving mold plate (8). Then, the piston rod of the side-pulling cylinder (23) drives the pull rod (24) to move outwards. The pull rod pulls the side core-pulling slider (17) to slide outwards along the side slide block (15), while the sliding plate (16) and the inclined slide block (18) move outwards. First, keep it still, so that the inclined top seat (22) abuts against the inner wall of the baffle (97) of the long car door sill (9). While the side core-pulling slider (17) moves outward, the inclined hole in the side core-pulling slider engages with the inclined top rod (20), causing the inclined top rod to gradually move laterally to one side. One end of the inclined top rod moves laterally along the inclined slide seat (18) via the inclined slider (19), and the other end of the inclined top rod causes the inclined top seat (22) to move laterally to pull out the baffle (97) and the vertical plate (96). At the angle between the two sides and the transverse reinforcing rib (98), the side core-pulling slider (17) moves outward and contacts the sliding plate (16). The side core-pulling slider drives the sliding plate (16) to slide outward along the side slide block (15). The sliding plate (16) drives the inclined slide block (18), the inclined slider (19), the inclined push rod (20), and the inclined push block (22) that has completed the transverse core-pulling to move outward together, so that it is removed from the B-pillar lower surround (93) of the long strip car door sill (9).

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