A core-pulling structure and an automobile bumper mold

Abstract

The present invention provides a core-pulling structure and an automobile bumper mold. The core-pulling structure includes a slider body and a core. The technical solution of the present invention adds a core-pulling structure, that is, a plurality of cores are arranged on the slider body, the sliding direction of the cores intersects with the mold opening direction, and the plurality of cores slide and are respectively inserted into a plurality of core-pulling holes for forming the cores of holes, cavities or bosses. Therefore, after the injection molding in the mold cavity is completed, the slider body can be driven away from the front mold by a cylinder or the like, and the plurality of cores are synchronously pulled out of the core-pulling holes in the second direction, so that the plurality of cores are separated from the product, so that when the front mold and the rear mold are opened in the first direction subsequently, demolding can be smoothly achieved. Therefore, after the core-pulling structure of the present invention is applied to an automobile bumper mold, the structure of the mold can be simplified and the manufacturing cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and particularly relates to a core-pulling structure and an automobile bumper mold. Background Art

[0002] Automobile bumpers are installed at the front and rear ends of an automobile. They not only have a decorative function, but more importantly, they are safety devices that absorb and mitigate external impact forces, protect the vehicle body and the safety of the vehicle occupants. Therefore, for different shapes of automobile bumpers, different injection mold structures are required. As people's requirements for the appearance of automobile products are getting higher and higher. In its injection molding process, when there are holes, cavities or bosses on the outer side of the plastic part formed by injection molding and in a direction different from the mold opening and closing direction, multiple oil cylinders need to be used for independent core-pulling, and each oil cylinder requires 2 limit switches and 2 oil pipes for one inlet and one outlet, resulting in a complex mold structure, high manufacturing cost, and increased mold difficulty. Summary of the Invention

[0003] The main object of the present invention is to provide a core-pulling structure and an automobile bumper mold, aiming to solve the technical problem that in the existing bumper mold, when core-pulling the outer holes, cavities or bosses in a direction different from the injection molding and mold opening and closing directions, multiple oil cylinders need to be used for independent core-pulling, resulting in a complex mold structure, high manufacturing cost, and increased mold difficulty.

[0004] To achieve the above object, the present invention provides a core-pulling structure applied to an automobile bumper mold. The automobile bumper mold includes a front mold and a rear mold. The front mold and the rear mold are closed or opened in a first direction. A cavity is formed between the front mold and the rear mold. The front mold is provided with a core-pulling hole in a second direction, and the core-pulling hole communicates with the cavity. The first direction and the second direction intersect. The core-pulling structure includes:

[0005] A slider body is arranged on the front mold, and the slider body can move relatively closer to or away from the front mold in the second direction;

[0006] A plurality of core rods are arranged on the surface of the slider body facing the front mold. The number of the core rods corresponds to the number of the core-pulling holes one by one, and the core rods are slidably arranged in the core-pulling holes.

[0007] Preferably, a guiding hole is formed on the side wall of the front mold facing the slider body. The core-pulling structure further includes:

[0008] A rotating mechanism is arranged on the front mold, and the slider body is rotatably arranged on the rotating mechanism;

[0009] A guide post is arranged on the slider body, and the length direction of the guide post is parallel to the second direction. The guide post is slidably arranged in the guiding hole;

[0010] Wherein, when the slider body rotates in the opposite direction of the front mold through the rotating mechanism, the slider translates along the length direction of the guide post and moves away from the front mold.

[0011] Preferably, one end of the guide post can penetrate through the slider body and be fixedly connected to the guide hole, while the other end of the guide post is slidably connected to the slider body, and no specific limitation is made here.

[0012] Preferably, two chutes in the first direction are provided on the slider body, and the two chutes are symmetrically arranged on both sides of the slider body in the length direction. The rotating mechanism includes:

[0013] A sliding block, which is slidably arranged on the front mold, and the slider body is connected to the sliding block;

[0014] At least two fixing blocks, which are arranged on the slider body at intervals;

[0015] A rotating shaft, which sequentially penetrates through the two fixing blocks and is rotatably connected to the two fixing blocks;

[0016] Two sliding plates, which are respectively slidably arranged in the two chutes;

[0017] Two rotating rods, one ends of the two rotating rods are respectively fixedly connected to the two ends of the rotating shaft, and the other ends of the two rotating rods are respectively hinged to the two sliding plates;

[0018] Wherein, when the slider body is stressed and rotates in the opposite direction of the front mold, the rotating rods rotate synchronously and in the same direction, and drive the sliding plates to displace in the first direction, so that the slider body translates along the length direction of the guide post and moves away from the front mold.

[0019] Preferably, two guiding grooves are provided on the front mold, and the core-pulling structure further includes:

[0020] Two guide rails, one ends of the two guide rails are both connected to the slider body, and the other ends of the two guide rails are respectively slidably arranged in the two guiding grooves, and the sliding directions of the two guide rails are parallel to the second direction.

[0021] Preferably, the two guiding grooves are provided at one end of the front mold far from the rear mold, and the guiding grooves are in an L-shaped structure, and the guide rails are in an L-shaped structure.

[0022] Preferably, two travel switches are provided on the front mold, and the two travel switches are arranged at intervals. A travel positioning groove is provided on the slider body, and the length direction of the positioning groove is in the second direction. The core-pulling structure further includes:

[0023] A driving cylinder is provided on the slider body. The travel switch is electrically connected to the driving cylinder, and the driving cylinder is used to drive the slider body to approach or move away from the front mold.

[0024] A trigger member is provided in the travel positioning groove, and the trigger member is located between the two travel switches.

[0025] Wherein, when the driving cylinder drives the slider body to approach the front mold, and when one end of the trigger member away from the front mold abuts against one of the travel switches, the driving cylinder stops operating; when the driving cylinder drives the slider body to move away from the front mold, and when one end of the trigger member away from the front mold abuts against the other travel switch, the driving cylinder stops operating.

[0026] Preferably, a limiting pull rod mechanism is provided on the side of the slider body facing the front mold. When the slider body moves away from the front mold in the second direction, the limiting pull rod mechanism is used to limit the distance between the slider body and the front mold.

[0027] Preferably, a limiting groove is formed on the slider body, and a sliding hole penetrating the slider body is formed at the bottom of the limiting groove. The limiting pull rod mechanism includes:

[0028] A limiting pull rod is slidably arranged in the sliding hole, and one end of the limiting pull rod is connected to the front mold. A limiting gap is left between the end of the limiting pull rod away from the slider body and the bottom of the limiting groove.

[0029] Wherein, when the slider body moves away from the front mold a certain distance in the second direction, the end of the limiting pull rod away from the slider body abuts against the bottom of the limiting groove.

[0030] The present invention also provides an automobile bumper mold, including the core-pulling structure as described in any one of the above. The automobile bumper mold further includes:

[0031] A driving component is provided on the front mold, and the driving component is used to drive the core-pulling structure to move away from the front mold in the second direction.

[0032] The technical solution of the present invention adds a core-pulling structure, that is, a plurality of core pins are arranged on the slider body. The sliding direction of the core pins intersects with the mold opening direction. The plurality of core pins slide and are respectively inserted into a plurality of core-pulling holes for forming the cores of holes, cavities or bosses. Therefore, after the injection molding in the mold cavity is completed, the slider body can be driven away from the front mold by a cylinder or the like, and the plurality of core pins are synchronously pulled out of the core-pulling holes in the second direction, so that the plurality of core pins are separated from the product, facilitating the subsequent mold opening of the front mold and the rear mold in the first direction and enabling smooth demolding. When the core-pulling structure of the present invention is applied to an automobile bumper mold, the structure of the mold can be simplified and the manufacturing cost can be reduced. Brief Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0034] Figure 1 Structural schematic diagram of an embodiment of the core-pulling structure of the present invention;

[0035] Figure 2 Structural schematic diagram of another embodiment of the core-pulling structure of the present invention;

[0036] Figure 3 Structural schematic diagram of still another embodiment of the core-pulling structure of the present invention;

[0037] Figure 4 For Figure 3 Cross-sectional structural schematic diagram of Q-Q in

[0038] Figure 5 For Figure 3 Cross-sectional structural schematic diagram of K-K in

[0039] Figure 6 For Figure 5 Partial enlarged view at N1 in

[0040] Explanation of the reference numerals in the drawings:

[0041]

[0042] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the drawings. Detailed Embodiments

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] The present invention provides a core-pulling structure 100.

[0047] As Figures 1 to 6 shown, the core-pulling structure 100 of the present invention is applied to an automobile bumper mold. The automobile bumper mold includes a front mold 200 and a rear mold (not shown in the figure). The front mold 200 and the rear mold are closed or opened in a first direction. A cavity (not shown in the figure) is formed between the front mold 200 and the rear mold. The front mold 200 is provided with a core-pulling hole (not shown in the figure) in a second direction. The core-pulling hole is communicated with the cavity. The first direction (such as Figure 4 the Y axis in Figure 4 the figure) and the second direction (such as

[0048] An automobile bumper mold has a front mold and a rear mold. After the front mold 200 and the rear mold are closed, a cavity is formed. High-pressure injection molding liquid is injected into the core 20. After cooling, the mold is opened to take out the injection-molded automobile bumper (i.e., the injection-molded product). However, when there are holes, cavities or bosses on the outer side of the plastic part in the injection molding that are different from the mold opening and closing direction, the plastic part cannot be directly ejected from the mold by an ejector mechanism such as an ejector pin. That is, when the front mold 200 and the rear mold are opened in the first direction, the product will be damaged. In view of this, the slide block for forming this part on the mold must use a movable core 20 (core pulling structure 100) that can move laterally, so that before the plastic part is ejected from the mold, the lateral forming slide block is first pulled out, and then the plastic part is ejected from the mold.

[0049] In this embodiment, by providing a core pulling structure 100 on the front mold 200, that is, by providing a plurality of cores 20 on the slider body 10, the sliding direction of the cores 20 intersects with the mold opening direction, and the plurality of cores 20 slide and are inserted into a plurality of core pulling holes for forming the slide block for holes, cavities or bosses. Therefore, after the injection molding in the cavity is completed, the slider body 10 can be driven away from the front mold 200 by a cylinder or the like, and the plurality of cores 20 are synchronously pulled out of the core pulling holes in the second direction, so that the plurality of cores 20 are separated from the product, so as to facilitate the subsequent smooth opening of the front mold 200 and the rear mold in the first direction and prevent movement interference. Therefore, after the core pulling structure 100 of the present invention is applied to an automobile bumper mold, the structure of the mold can be simplified and the manufacturing cost can be reduced.

[0050] Specifically, a guiding hole (not marked in the figure) is provided on the side wall of the front mold 200 facing the slider body 10. The core pulling structure 100 further includes: a rotating mechanism provided on the front mold 200, and the slider body 10 is rotatably provided on the rotating mechanism; a guide post 31 provided on the slider body 10, and the length direction of the guide post 31 is parallel to the second direction, and the guide post 31 is slidably provided in the guiding hole; wherein, when the slider body 10 is forced to rotate in the opposite direction of the front mold 200 through the rotating mechanism, the slider translates along the length direction of the guide post 31 and moves away from the front mold 200. In this embodiment, at least one guiding hole can be opened on the front mold 200, the axis of the guiding hole is parallel to the second direction, a guide post 31 is provided on the slider body 10, the guide post 31 is slidably provided in the guiding hole, and the slider body 10 is provided on the front mold 200 through the rotating mechanism. After the injection molding is completed, the slider body 10 can be driven to rotate in the opposite direction of the front mold 200 by a cylinder or the like. The slider body 10 rotates around the rotating mechanism, and the rotational motion is decomposed into the second direction, so that the slider body 10 moves away from the front mold 200 along the guide post 31, driving the plurality of cores 20 to be separated from the product.

[0051] It is understandable that one end of the guide post 31 can penetrate through the slider body 10 and be fixedly connected to the guide hole, while the other end of the guide post 31 is slidably connected to the slider body 10, and no specific limitation is made here.

[0052] Specifically, the core-pulling structure 100 further includes: a guide sleeve 32, the guide sleeve 32 is arranged on the slider body 10 and penetrates through the slider body 10, and the guide post 31 is slidably arranged on the guide sleeve 32. In this embodiment, one end of the guide post 31 can penetrate through the slider body 10 and be fixedly connected to the guide hole, while the other end of the guide post 31 is slidably connected to the slider body 10. In order to improve the sliding stability of the guide post 31, a guide sleeve 32 can be embedded in the slider body 10 so that the slider body 10 is slidably connected to the guide sleeve 32.

[0053] Specifically, two chutes A in the first direction are formed on the slider body 10, and the two chutes A are symmetrically arranged on both sides of the slider body 10 in the length direction. The rotating mechanism includes: a sliding block 33, the sliding block 33 is slidably arranged on the front mold 200, and the slider body 10 is connected to the sliding block 33; at least two fixing blocks 34, at least two fixing blocks 34 are arranged on the slider body 10 at intervals; a rotating shaft 35, the rotating shaft 35 sequentially penetrates through the two fixing blocks 34 and is rotatably connected to the two fixing blocks 34; two sliding plates 36, the two sliding plates 36 are respectively slidably arranged in the two chutes A; two rotating rods 37, one ends of the two rotating rods 37 are respectively fixedly connected to the two ends of the rotating shaft 35, and the other ends of the two rotating rods 37 are respectively hinged to the two sliding plates 36; wherein, when the slider body 10 is stressed and rotates in the opposite direction of the front mold 200, the rotating rods 37 rotate synchronously and in the same direction, and drive the sliding plates 36 to displace in the first direction, so that the slider body 10 translates along the length direction of the guide post 31 and moves away from the front mold 200.

[0054] In this embodiment, the rotational motion of the rotating rod 37 is converted into the linear motion of the slider body 10, and its motion can be compensated. When the slider body 10 is stressed and rotates in the opposite direction of the front mold 200, the two fixing blocks 34 are used to install the rotating shaft 35, so that the slider body 10 is arranged on the front mold 200 at intervals, and the slider body 10 rotates around the axis of the rotating shaft 35, while driving the rotating rods 37 to rotate synchronously and in the same direction. Since the sliding plates 36 are slidably arranged in the chutes A, the rotational motion of the rotating rods 37 is converted into the linear motion of the sliding plates 36, that is, the sliding plates 36 move away from the rear mold, so that the slider body 10 has a displacement amount away from the front mold 200, and the slider body 10 moves away from the front mold 200, so that the plurality of cores 20 are separated from the product.

[0055] It can be understood that after the mold opening is completed, only the slider body 10 needs to be driven to rotate in the direction of the front mold 200. The rotational motion of the rotating rod 37 is converted into the linear motion of the sliding plate 36. That is, the sliding plate 36 moves closer to the rear mold, so that the slider body 10 has a displacement amount close to the front mold 200, and the slider body 10 is close to the front mold 200, enabling multiple cores 20 to extend into the cavity.

[0056] Specifically, two guiding grooves (not marked in the figure) are provided on the front mold 200. The core-pulling structure 100 further includes: two guide rails. One end of each of the two guide rails is connected to the slider body 10, and the other ends of the two guide rails are respectively slidably disposed in the two guiding grooves. The sliding directions of the two guide rails are parallel to the second direction. In this embodiment, in order to improve the sliding stability of the slider body 10 in the second direction, two guide rails can be provided. When the slider moves away from the front mold 200, the two guide rails slide in the two guiding grooves, using the guide rails to improve the sliding stability of the slider body 10 and defining the sliding direction of the slider body 10.

[0057] Specifically, the two guiding grooves are provided at one end of the front mold 200 away from the rear mold, and the guiding grooves are in an L-shaped structure, and the guide rails are in an L-shaped structure. In this embodiment, in order to further improve the sliding stability of the slider body 10, an L-shaped guiding groove can be provided at one end of the front mold 200 away from the rear mold, that is, on the surface of the front mold 200 away from the rear mold and on the surface of the front mold 200 facing the slider body 10, notches communicating with each other are provided to form an L-shaped guiding groove, and the guide rails are in an L-shaped structure, and the side of the guide rail away from the slider body 10 is slidably disposed in the guiding groove, and at the same time, the slider body 10 is stably placed on the front mold 200.

[0058] Specifically, two travel switches 40 are provided on the front mold 200, and the two travel switches 40 are spaced apart. A travel positioning groove C is provided on the slider body 10, and the length direction of the positioning groove C is in the second direction. The core-pulling structure 100 further includes: a driving cylinder, the driving cylinder is provided on the slider body 10, the travel switch 40 is electrically connected to the driving cylinder, and the driving cylinder is used to drive the slider body 10 to approach or move away from the front mold 200; a triggering member 38, the triggering member 38 is provided in the travel positioning groove C, and the triggering member 38 is located between the two travel switches 40; wherein, when the driving cylinder drives the slider body 10 to approach the front mold 200, when one end of the triggering member 38 away from the front mold 200 abuts against one of the travel switches 40, the driving cylinder stops operating; when the driving cylinder drives the slider body 10 to move away from the front mold 200, when one end of the triggering member 38 away from the front mold 200 abuts against the other travel switch 40, the driving cylinder stops operating.

[0059] In this embodiment, when the driving cylinder drives the slider body 10 to rotate in the direction opposite to the front mold 200, the slider body 10 rotates around the axis of the rotating shaft 35, and at the same time drives the rotating rod 37 to rotate synchronously and in the same direction. The rotational motion of the rotating rod 37 is converted into the linear motion of the sliding plate 36, that is, the sliding plate 36 moves away from the rear mold, so that the slider body 10 has a displacement amount away from the front mold 200, and the slider body 10 moves away from the front mold 200 until one end of the trigger 38 away from the front mold 200 abuts against one of the travel switches 40, and then the driving cylinder stops operating. At this time, the multiple cores 20 are all separated from the product, preventing the slider body 10 from rotating too large an angle. On the contrary, when the slider body 10 is forced to rotate in the direction of the front mold 200, the rotational motion of the rotating rod 37 is converted into the linear motion of the sliding plate 36, that is, the sliding plate 36 moves closer to the rear mold, so that the slider body 10 has a displacement amount closer to the front mold 200, and the slider body 10 moves closer to the front mold 200 until one end of the trigger 38 facing the front mold 200 abuts against the other travel switch 40, and the driving cylinder stops operating, so that the multiple cores 20 extend into the cavity to improve the accuracy of the slider body 10's resetting.

[0060] Specifically, a limiting pull rod mechanism 50 is provided on the side of the slider body 10 facing the front mold 200. When the slider body 10 moves away from the front mold 200 in the second direction, the limiting pull rod mechanism 50 is used to limit the distance between the slider body 10 and the front mold 200. As an optional embodiment, a limiting pull rod mechanism 50 can be provided on the side of the slider body 10 facing the front mold 200. When the slider body 10 is forced to rotate in the direction of the front mold 200, the limiting pull rod mechanism 50 is used to limit the distance between the slider body 10 and the front mold 200 to improve the accuracy of the slider body 10's resetting.

[0061] Specifically, a limiting groove B is formed in the slider body 10. A sliding hole penetrating the slider body 10 is formed at the bottom of the limiting groove B. The limiting pull rod mechanism 50 includes: a limiting pull rod 51 which is slidably arranged in the sliding hole, and one end of the limiting pull rod 51 is connected to the front mold 200. A limiting gap is left between the end of the limiting pull rod 51 far from the slider body 10 and the bottom of the limiting groove B. Wherein, when the slider body 10 is at a certain distance away from the front mold 200 in the second direction, the end of the limiting pull rod 51 far from the slider body 10 abuts against the bottom of the limiting groove B. In this embodiment, in order to further limit the distance between the slider body 10 and the front mold 200, a limiting groove B can be formed in the slider body 10, the limiting pull rod 51 penetrates the bottom of the limiting groove B, and the end of the limiting pull rod 51 facing the front mold 200 is fixedly connected to the front mold 200. After multiple core pins 20 are reset, a limiting gap is left between the limiting pull rod 51 and the bottom of the limiting groove B, and the size of this limiting gap can be adjusted to facilitate restricting the maximum displacement of the slider body 10 away from the front mold 200. When the slider body 10 is at a certain distance away from the front mold 200 in the second direction, the end of the limiting pull rod 51 far from the slider body 10 abuts against the bottom of the limiting groove B.

[0062] It can be understood that a spring (not shown in the figure) can be arranged in the limiting gap to facilitate rapid resetting by using the spring.

[0063] The present invention also provides an automobile bumper mold, including the core-pulling structure 100 described above. The automobile bumper mold further includes: a driving component (not labeled in the figure), which is arranged on the front mold 200 and is used to drive the core-pulling structure 100 to move away from the front mold 200 in the second direction. For the specific structure of this core-pulling structure 100, refer to the above embodiment. Since this automobile bumper mold adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0064] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A core-pulling structure, characterized in that, Applied to an automobile bumper mold, the automobile bumper mold includes a front mold and a rear mold. The front mold and the rear mold are closed or opened in a first direction. A cavity is formed between the front mold and the rear mold. The front mold is provided with core-pulling holes located in a second direction. The core-pulling holes communicate with the cavity. The first direction and the second direction intersect. The core-pulling structure includes: A slider body, which is arranged on the front mold. The slider body can move relatively closer to or farther away from the front mold in the second direction; A plurality of core rods. A plurality of the core rods are arranged on the surface of the slider body facing the front mold. The number of the core rods corresponds to the number of the core-pulling holes one by one. The core rods are slidably arranged in the core-pulling holes; A guiding hole is formed on the side wall of the front mold facing the slider body. The core-pulling structure further includes: A rotating mechanism, which is arranged on the front mold. The slider body is rotatably arranged on the rotating mechanism; A guide post, which is arranged on the slider body. The length direction of the guide post is parallel to the second direction. The guide post is slidably arranged in the guiding hole; Wherein, when the slider body rotates in the opposite direction of the front mold through the rotating mechanism, the slider translates along the length direction of the guide post and moves away from the front mold; The core-pulling structure further includes: A guide sleeve, which is arranged on the slider body and penetrates through the slider body. The guide post is slidably arranged on the guide sleeve; Two chutes located in the first direction are formed on the slider body. The two chutes are symmetrically arranged on both sides of the length direction of the slider body. The rotating mechanism includes: A sliding block, which is slidably arranged on the front mold. The slider body is connected to the sliding block; At least two fixing blocks, which are arranged on the slider body at intervals; A rotating shaft, which sequentially penetrates through the two fixing blocks and is rotatably connected to the two fixing blocks; Two sliding plates, which are respectively slidably arranged in the two chutes; Two rotating rods, one ends of the two rotating rods are respectively fixedly connected to the two ends of the rotating shaft, and the other ends of the two rotating rods are respectively hinged to the two sliding plates; Wherein, when the slider body is forced to rotate in the opposite direction of the front mold, the rotating rods rotate synchronously and in the same direction, and drive the sliding plates to displace in the first direction, so that the slider body translates along the length direction of the guide post and moves away from the front mold.

2. The core-pulling structure according to claim 1, wherein, The sliding block is a guide rail. Two guiding grooves are formed on the front mold. The core-pulling structure further includes: Two guide rails. One ends of the two guide rails are both connected to the slider body. The other ends of the two guide rails are respectively slidably arranged in the two guiding grooves. The sliding directions of the two guide rails are parallel to the second direction.

3. The core-pulling structure according to claim 2, characterized in that The two guiding grooves are formed at one end of the front mold away from the rear mold, and the guiding grooves are in an L-shaped structure. The guide rails are in an L-shaped structure.

4. The core-pulling structure according to claim 1, characterized in that, Two stroke switches are arranged on the front mold. The two stroke switches are arranged at intervals. A stroke positioning groove is formed on the slider body. The length direction of the positioning groove is located in the second direction. The core-pulling structure further includes: A driving cylinder is arranged on the slider body. The travel switch is electrically connected to the driving cylinder, and the driving cylinder is used to drive the slider body to approach or move away from the front mold. A trigger is arranged in the travel positioning groove, and the trigger is located between the two travel switches. Among them, when the driving cylinder drives the slider body to approach the front mold, when one end of the trigger away from the front mold abuts against one of the travel switches, the driving cylinder stops operating; when the driving cylinder drives the slider body to move away from the front mold, when one end of the trigger away from the front mold abuts against the other travel switch, the driving cylinder stops operating.

5. The core-pulling structure according to claim 1, wherein A limiting pull rod mechanism is arranged on the side of the slider body facing the front mold. When the slider body moves away from the front mold in the second direction, the limiting pull rod mechanism is used to limit the distance between the slider body and the front mold.

6. The core-pulling structure according to claim 5, characterized in that, A limiting groove is formed in the slider body, and a sliding hole penetrating the slider body is formed at the bottom of the limiting groove. The limiting pull rod mechanism includes: A limiting pull rod that is slidably arranged in the sliding hole. One end of the limiting pull rod is connected to the front mold, and a limiting gap is left between the end of the limiting pull rod away from the slider body and the bottom of the limiting groove. Among them, when the slider body moves away from the front mold by a certain distance in the second direction, the end of the limiting pull rod away from the slider body abuts against the bottom of the limiting groove.

7. An automobile bumper mold, characterized in that, Including the core-pulling structure according to any one of claims 1-6, the automobile bumper mold further includes: A driving component is arranged on the front mold, and the driving component is used to drive the core-pulling structure to move away from the front mold in the second direction.

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