CN212736910U - Core pulling structure and automobile bumper mold - Google Patents

Abstract

The utility model provides a structure of loosing core and car bumper mould. The core pulling structure comprises a slider body and a mold core. The utility model discloses technical scheme is through addding a structure of loosing core, set up a plurality of cores promptly on the slider body, the slip direction and the die sinking direction of core are crossing, a plurality of cores slide and insert respectively and locate a plurality of holes of loosing core, for be used for the shaping hole, the capable position of cave or boss, therefore, after injection moulding accomplishes in the die cavity, the front mould is kept away from to drive slider bodies such as accessible cylinder, take out a plurality of cores in the second direction in step and take out the hole of loosing core, make a plurality of cores break away from with the product, so that follow-up front mould and back mould when the die sinking on the first direction, can realize the drawing of patterns smoothly. Therefore, the utility model discloses a structure of mould can be simplified after the structure of loosing core is applied to car bumper mould, reduces the cost of manufacture.

Description

Core pulling structure and automobile bumper mold

Technical Field

The utility model relates to the technical field of mold, in particular to core pulling structure and car bumper mould.

Background

The front end and the rear end of the automobile are provided with bumpers which not only have the decoration function, but also are more important to be safety devices which absorb and buffer the external impact force and protect the automobile body and passengers. Therefore, the required injection mold structure is different according to different shapes of the automobile bumper, and the requirements of people on the appearance of automobile products are higher and higher. In its injection molding process, when on injection moulding's the piece of moulding, and when having hole, cave or boss with the outside that opens and shuts the mould direction difference, need adopt a plurality of hydro-cylinders to loose the core alone, every hydro-cylinder all needs 2 limit switch and one to advance 2 oil pipes in addition, leads to the mould structure complicacy, and the cost of manufacture is high, increases the mould degree of difficulty.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a structure of loosing core and car bumper mould aims at solving current bumper mould, when moulding plastics and the different outside hole of the mould direction that opens and shuts, cave or boss, need adopt a plurality of hydro-cylinders to loose core alone, leads to the mould structure complicated, and the cost of manufacture is high, increases the technical problem of the mould degree of difficulty.

In order to realize the above-mentioned purpose, the utility model provides a loose core structure is applied to car bumper mould, car bumper mould includes front mould and back mould, the front mould with back mould compound die or die sinking on the first direction, the front mould with be formed with the die cavity between the back mould, the loose core hole that is located the second direction is seted up to the front mould, the loose core hole with the die cavity intercommunication, the first direction with the second direction is crossing, the structure of loosing core includes:

the sliding block body is arranged on the front die and can relatively approach or depart from the front die in the second direction;

the plurality of cores are arranged on the surface, facing the front die, of the sliding block body, the number of the cores and the number of the core pulling holes are arranged in a one-to-one correspondence mode, and the cores are arranged in the core pulling holes in a sliding mode.

Preferably, the front mold faces the side wall of the slider body and is provided with a guide hole, and the core pulling structure further comprises:

the rotating mechanism is arranged on the front die, and the sliding block body is rotationally arranged on the rotating mechanism;

the guide post is arranged on the sliding block body, the length direction of the guide post is parallel to the second direction, and the guide post is arranged in the guide hole in a sliding manner;

when the sliding block body rotates towards the reverse direction of the front die through the rotating mechanism, the sliding block translates along the length direction of the guide post and is far away from the front die.

Preferably, one end of the guide post may penetrate through the slider body and be fixedly connected with the guide hole, and the other end of the guide post is slidably connected with the slider body, which is not particularly limited herein.

Preferably, two sliding chutes located in the first direction are formed in the slider body, the two sliding chutes are symmetrically arranged on two sides of the slider body in the length direction, and the rotating mechanism includes:

the sliding block is arranged on the front die in a sliding mode, and the sliding block body is connected with the sliding block;

the at least two fixing blocks are arranged on the sliding block body at intervals;

the rotating shaft sequentially penetrates through the two fixing blocks and is rotatably connected with the two fixing holes;

the two sliding plates are respectively arranged in the two sliding grooves in a sliding manner;

one ends of the two rotating rods are fixedly connected with two ends of the rotating shaft respectively, and the other ends of the two rotating rods are hinged with the two sliding plates respectively;

when the sliding block body is stressed to rotate towards the direction opposite to the front die, the rotating rod synchronously and equidirectionally rotates and drives the sliding plate to displace in the first direction, so that the sliding block body translates along the length direction of the guide post and is far away from the front die.

Preferably, two guide ways have been seted up on the front mould, the structure of loosing core still includes:

and one end of each of the two guide rails is connected with the sliding block body, the other end of each of the two guide rails is arranged in the two guide grooves in a sliding manner, and the sliding directions of the two guide rails are parallel to the second direction.

Preferably, the two guide grooves are formed in one end, far away from the rear die, of the front die, the guide grooves are of an L-shaped structure, and the guide rails are of an L-shaped structure.

Preferably, be provided with two travel switch on the front mould, two travel switch interval sets up, the stroke constant head tank has been seted up on the slider body, the length direction of constant head tank is located on the second direction, the structure of loosing core still includes:

the driving cylinder is arranged on the slider body, the travel switch is electrically connected with the driving cylinder, and the driving cylinder is used for driving the slider body to be close to or far away from the front die;

the trigger piece is arranged in the stroke positioning groove and is positioned between the two stroke switches;

the driving cylinder drives the slider body to be close to the front die, and when one end of the trigger piece, far away from the front die, abuts against one of the travel switches, the driving cylinder stops operating; the driving cylinder drives the slider body to be far away from the front die, and when one end, far away from the front die, of the trigger piece abuts against the other travel switch, the driving cylinder stops operating.

Preferably, a limit pull rod mechanism is arranged on one side, facing the front die, of the slider body, and when the slider body is far away from the front die in the second direction, the limit pull rod mechanism is used for limiting the distance between the slider body and the front die.

Preferably, the slider body is provided with a limit groove, the groove bottom of the limit groove is provided with a sliding hole penetrating through the slider body, and the limit pull rod mechanism comprises:

the limiting pull rod is arranged in the sliding hole in a sliding mode, one end of the limiting pull rod is connected with the front die, and a limiting gap is reserved between one end, far away from the sliding block body, of the limiting pull rod and the bottom of the limiting groove;

when the slider body is far away from the front die in the second direction for a certain distance, one end of the limiting pull rod, far away from the slider body, is abutted against the bottom of the limiting groove.

The utility model also provides an automobile bumper mould, include as above-mentioned arbitrary any the structure of loosing core, medical equipment still includes:

and the driving assembly is arranged on the front mold and is used for driving the core-pulling structure to be away from the front mold in the second direction.

The utility model discloses technical scheme is through addding a structure of loosing core, set up a plurality of cores promptly on the slider body, the slip direction and the die sinking direction of core are crossing, a plurality of cores slide and insert respectively and locate a plurality of holes of loosing core, for be used for the shaping hole, the capable position of cave or boss, therefore, after injection moulding accomplishes in the die cavity, the front mould is kept away from to drive slider bodies such as accessible cylinder, take out a plurality of cores in the second direction in step and take out the hole of loosing core, make a plurality of cores break away from with the product, so that follow-up front mould and back mould when the die sinking on the first direction, can realize the drawing of patterns smoothly. The utility model discloses a loose core structure is applied to car bumper mould after, can simplify the structure of mould, reduces the cost of manufacture.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of the core pulling structure of the present invention;

fig. 2 is a schematic structural view of another embodiment of the core pulling structure of the present invention;

fig. 3 is a schematic structural view of another embodiment of the core pulling structure of the present invention;

FIG. 4 is a schematic cross-sectional view of Q-Q of FIG. 3;

FIG. 5 is a schematic cross-sectional view of K-K in FIG. 3;

fig. 6 is a partial enlarged view of fig. 5 at N1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Core pulling structure	10	Slider body
20	Mold core	31	Guide post
				32	Guide sleeve	33	Sliding block
34	Fixed block	35	Rotating shaft
				36	Sliding plate	37	Rotary rod
38	Trigger piece	40	Travel switch
				50	Limit pull rod mechanism	51	Limit pull rod
A	Sliding chute	B	Limiting groove
				C	Locating slot	200	Front mould

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a structure of loosing core 100.

As shown in fig. 1 to 6, the utility model discloses loose core structure 100 is applied to car bumper mould, car bumper mould includes front mould 200 and back mould (not shown in the figure), front mould 200 with back mould compound die or die sinking in the first direction, front mould 200 with be formed with die cavity (not shown in the figure) between the back mould, core pulling hole (not shown in the figure) that is located the second direction is seted up to front mould 200, core pulling hole with the die cavity intercommunication, first direction (as the Y axle in fig. 4) with the second direction (as the X axle in fig. 4) is crossing, loose core structure 100 includes: a slider body 10, the slider body 10 being disposed on the front mold 200, the slider body 10 being relatively movable toward or away from the front mold 200 in the second direction; and the plurality of mold cores 20 are arranged on the surface of the slider body 10 facing the front mold 200, the number of the mold cores 20 corresponds to the number of the core pulling holes one by one, and the mold cores 20 are arranged in the core pulling holes in a sliding manner.

The automobile bumper mold is provided with a front mold and a rear mold, the front mold 200 and the rear mold form a cavity after being closed, high-pressure injection liquid is injected into the mold core 20, and after cooling, the mold is opened and the injection molded automobile bumper (namely an injection molded product) is taken out. However, when the injection-molded plastic part has holes, recesses or bosses on the outer side in the direction different from the mold opening and closing direction, the plastic part cannot be ejected and demolded directly by an ejection 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 is ejected, and therefore, the row position where the mold is molded must use a movable core 20 (core-pulling structure 100) that can move laterally, so that the lateral molding row position is firstly extracted before the plastic part is ejected and then the plastic part is ejected from the mold.

In this embodiment, through setting up the structure 100 of loosing core on front mould 200, set up a plurality of cores 20 on the slider body 10 promptly, the slip direction of core 20 intersects with the die sinking direction, a plurality of cores 20 slide and insert and locate a plurality of holes of loosing core, in order to be used for the line position of shaping hole, cave or boss, consequently, after the completion of moulding in the die cavity, accessible cylinder etc. drive slider body 10 keeps away from front mould 200, with a plurality of cores 20 in the synchronous core pulling hole of loosing of second direction, make a plurality of cores 20 break away from with the product, so that follow-up front mould 200 and back mould can be smoothly when the die sinking in the first direction, prevent to cause the motion to interfere. Therefore, the utility model discloses a structure of mould can be simplified after structure of loosing core 100 is applied to car bumper mould, reduces the cost of manufacture.

Specifically, a guide hole (not labeled in the figure) is opened on the side wall of the front mold 200 facing the slider body 10, and the core pulling structure 100 further includes: the rotating mechanism is arranged on the front die 200, and the slider body 10 is rotatably arranged on the rotating mechanism; a guide post 31, wherein the guide post 31 is disposed on the slider body 10, the length direction of the guide post 31 is parallel to the second direction, and the guide post 31 is slidably disposed in the guide hole; when the slider body 10 is forced to rotate in the opposite direction of the front mold 200 by 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 guide hole may be formed in the front mold 200, an axis of the guide hole is parallel to the second direction, the guide post 31 is disposed on the slider body 10, the guide post 31 is slidably disposed in the guide hole, the slider body 10 is disposed on the front mold 200 through a rotating mechanism, after the injection molding is completed, the slider body 10 may be driven by an air cylinder or the like to rotate in a direction opposite to the front mold 200, the slider body 10 rotates around the rotating mechanism, and the rotating motion is decomposed into the second direction, so that the slider body 10 is far away from the front mold 200 along the guide post 31, and the plurality of cores 20 are driven to be separated from the product.

It is understood that one end of the guide post 31 may penetrate through the slider body 10 and be fixedly connected to the guide hole, and the other end of the guide post 31 is slidably connected to the slider body 10, which is not particularly limited herein.

Specifically, the core pulling structure 100 further includes: the guide sleeve 32 is arranged on the slider body 10 and penetrates through the slider body 10, and the guide post 31 is arranged on the guide sleeve 32 in a sliding manner. In this embodiment, one end of the guide post 31 may penetrate through the slider body 10 and be fixedly connected to the guide hole, and 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 may be embedded in the slider 10, so that the slider 10 is slidably connected to the guide sleeve 32.

Specifically, set up two spout A that are located first direction on the slider body 10, two spout A symmetry set up in slider body 10 length direction's both sides, slewing mechanism includes: the sliding block 33 is arranged on the front die 200 in a sliding manner, and the sliding block body 10 is connected with the sliding block 33; at least two fixed blocks 34, wherein the at least two fixed blocks 34 are arranged on the slider body 10 at intervals; the rotating shaft 35 penetrates through the two fixing blocks 34 in sequence and is rotatably connected with the two fixing holes; the two sliding plates 36 are respectively arranged in the two sliding chutes A in a sliding manner; one end of each of the two rotating rods 37 is fixedly connected to two ends of the rotating shaft 35, and the other end of each of the two rotating rods 37 is hinged to the two sliding plates 36; when the slider body 10 is forced to rotate in the opposite direction of the front mold 200, the rotating rod 37 rotates synchronously and in the same direction, and drives the sliding plate 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.

In this embodiment, the rotational movement of the rotating lever 37 is converted into the linear movement of the slider body 10, and the movement thereof can be compensated. When the slider body 10 is forced to rotate in the opposite direction of the front mold 200, the two fixing blocks 34 are used for installing the rotating shaft 35, so that the slider body 10 is arranged on the front mold 200 at intervals, the slider body 10 rotates around the axis of the rotating shaft 35, and simultaneously, the rotating rod 37 is driven to synchronously and synchronously rotate, and as the sliding plate 36 is arranged in the sliding groove a in a sliding manner, the rotating motion of the rotating rod 37 is converted into the linear motion of the sliding plate 36, namely, the sliding plate 36 is far away from the rear mold, so that the slider body 10 has the displacement far away from the front mold 200, and the slider body 10 is far away from the front mold 200, and a plurality of cores 20 are separated from a product.

It can be understood that, after the mold opening is completed, the slider body 10 is only driven to rotate in the direction of the front mold 200 under force, and the rotary motion of the rotary rod 37 is converted into the linear motion of the slide plate 36, that is, the slide plate 36 moves close to the rear mold, so that the slider body 10 has a displacement close to the front mold 200, and the slider body 10 moves close to the front mold 200, so that the plurality of cores 20 extend into the mold cavity.

Specifically, two guide grooves (not labeled in the figure) are formed in the front mold 200, and the core pulling structure 100 further includes: and one end of each of the two guide rails is connected with the sliding block body 10, the other end of each of the two guide rails is arranged in the two guide grooves in a sliding manner, and 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 may be provided, and when the slider is away from the front mold 200, the two guide rails slide in the two guide grooves, so that the sliding stability of the slider body 10 is improved by the guide rails, and the sliding direction of the slider body 10 is limited.

Specifically, the two guide grooves are formed in one end of the front mold 200, which is far away from the rear mold, the guide 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 guide groove may be formed at one end of the front mold 200 away from the rear mold, that is, a surface of the front mold 200 away from the rear mold, and a surface of the front mold 200 facing the slider body 10 are formed with mutually communicated notches, so as to form the L-shaped guide groove, the guide rail is in an L-shaped structure, and one side of the guide rail away from the slider body 10 is slidably disposed in the guide groove, while the slider body 10 is stably placed on the front mold 200.

Specifically, be provided with two travel switch 40 on the front mould 200, two travel switch 40 interval sets up, stroke constant head tank C has been seted up on the slider body 10, constant head tank C's length direction is located on the second direction, structure 100 of loosing core still includes: the driving cylinder is arranged on the slider body 10, the travel switch 40 is electrically connected with the driving cylinder, and the driving cylinder is used for driving the slider body 10 to approach or depart from the front mold 200; the trigger piece 38 is arranged in the stroke positioning groove C, and the trigger piece 38 is located between the two stroke switches 40; wherein, the driving cylinder drives the slider body 10 to approach the front mold 200, and when one end of the trigger 38 far away from the front mold 200 abuts one of the travel switches 40, the driving cylinder stops operating; the driving cylinder drives the slider body 10 away from the front mold 200, and when one end of the trigger 38 away from the front mold 200 abuts against the other travel switch 40, the driving cylinder stops operating.

In this embodiment, when the driving cylinder drives the slider body 10 to rotate in the opposite direction of the front mold 200, the slider body 10 rotates around the axis of the rotating shaft 35, and simultaneously drives the rotating rod 37 to rotate synchronously and in the same direction, the rotating motion of the rotating rod 37 is converted into the linear motion of the sliding plate 36, that is, the sliding plate 36 is far away from the rear mold, so that the slider body 10 has a displacement away from the front mold 200, and the slider body 10 is far away from the front mold 200, until one end of the trigger 38 far away from the front mold 200 abuts against one of the stroke switches 40, the driving cylinder stops operating, and at this time, the plurality of cores 20 are all separated from the product, thereby preventing the slider body 10 from rotating at an excessively. On the contrary, when the slider body 10 is forced to rotate towards the front mold 200, the rotary motion of the rotary rod 37 is converted into the linear motion of the sliding plate 36, that is, the sliding plate 36 moves close to the rear mold, so that the slider body 10 has a displacement close to the front mold 200, and the slider body 10 is close to the front mold 200 until the trigger 38 abuts against another stroke switch 40 at one end facing the front mold 200, the driving cylinder stops operating, and the plurality of mold cores 20 extend into the mold cavity, so as to improve the accuracy of the resetting of the slider body 10.

Specifically, a limit pull rod mechanism 50 is disposed on one side of the slider body 10 facing the front mold 200, and when the slider body 10 is far away from the front mold 200 in the second direction, the limit pull rod mechanism 50 is used for limiting a distance between the slider body 10 and the front mold 200. As an alternative embodiment, a limit lever mechanism 50 may be provided on a side of the slider body 10 facing the front mold 200, and when the slider body 10 is forced to rotate toward the front mold 200, the limit lever mechanism 50 is used to limit the distance between the slider body 10 and the front mold 200, so as to improve the accuracy of the resetting of the slider body 10.

Specifically, a limit groove B is formed in the slider body 10, a sliding hole penetrating through the slider body 10 is formed in the groove bottom of the limit groove B, and the limit pull rod mechanism 50 includes: the limiting pull rod 51 is arranged in the sliding hole in a sliding mode, one end of the limiting pull rod 51 is connected with the front die 200, and a limiting gap is reserved between one end, far away from the sliding block body 10, of the limiting pull rod 51 and the bottom of the limiting groove B; when the slider body 10 is far away from the front mold 200 in the second direction by a certain distance, one end of the limit pull rod 51 far away from the slider body 10 is abutted against the bottom of the limit 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 may be formed in the slider body 10, the limiting pull rod 51 penetrates through the groove bottom of the limiting groove B, and one end of the limiting pull rod 51 facing the front mold 200 is fixedly connected to the front mold 200. After the plurality of mold cores 20 reset, a limit gap is left between the limit pull rod 51 and the groove bottom of the limit groove B, and the size of the limit gap can be adjusted, so that the maximum displacement of the slider body 10 away from the front mold 200 is limited, and when the slider body 10 is away from the front mold 200 in the second direction for a certain distance, one end of the limit pull rod 51 away from the slider body 10 is abutted to the groove bottom of the limit groove B.

It will be appreciated that a spring (not shown) may be provided within the spacing gap to facilitate quick return by the spring.

The utility model also provides an automobile bumper mould, including the aforesaid loose core structure 100, automobile bumper mould still includes: and a driving assembly (not labeled in the figures) disposed on the front mold 200, and configured to drive the core pulling structure 100 to be away from the front mold 200 in the second direction. The specific structure of the core pulling structure 100 refers to the above embodiments, and since the present automobile bumper mold adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims (10)

1. The utility model provides a structure of loosing core, its characterized in that is applied to car bumper mould, car bumper mould includes front mould and back mould, the front mould with back mould compound die or die sinking on the first direction, the front mould with be formed with the die cavity between the back mould, the coring hole that is located the second direction is seted up to the front mould, the coring hole with the die cavity intercommunication, the first direction with the second direction is crossing, the structure of loosing core includes:

the sliding block body is arranged on the front die and can relatively approach or depart from the front die in the second direction;

the plurality of cores are arranged on the surface, facing the front die, of the sliding block body, the number of the cores and the number of the core pulling holes are arranged in a one-to-one correspondence mode, and the cores are arranged in the core pulling holes in a sliding mode.

2. The core pulling structure of claim 1, wherein a guide hole is formed in a side wall of the front mold facing the slider body, and the core pulling structure further comprises:

the rotating mechanism is arranged on the front die, and the sliding block body is rotationally arranged on the rotating mechanism;

the guide post is arranged on the sliding block body, the length direction of the guide post is parallel to the second direction, and the guide post is arranged in the guide hole in a sliding manner;

when the sliding block body rotates towards the reverse direction of the front die through the rotating mechanism, the sliding block translates along the length direction of the guide post and is far away from the front die.

3. The core pulling structure of claim 2, further comprising:

the guide sleeve is arranged on the sliding block body and penetrates through the sliding block body, and the guide pillar is arranged on the guide sleeve in a sliding mode.

4. The core pulling structure of claim 2, wherein the slider body is provided with two sliding grooves located in a first direction, the two sliding grooves are symmetrically arranged on two sides of the slider body in the length direction, and the rotating mechanism comprises:

the sliding block is arranged on the front die in a sliding mode, and the sliding block body is connected with the sliding block;

the at least two fixing blocks are arranged on the sliding block body at intervals;

the rotating shaft sequentially penetrates through the two fixing blocks and is rotatably connected with the two fixing blocks;

the two sliding plates are respectively arranged in the two sliding grooves in a sliding manner;

one ends of the two rotating rods are fixedly connected with two ends of the rotating shaft respectively, and the other ends of the two rotating rods are hinged with the two sliding plates respectively;

when the sliding block body is stressed to rotate towards the direction opposite to the front die, the rotating rod synchronously and equidirectionally rotates and drives the sliding plate to displace in the first direction, so that the sliding block body translates along the length direction of the guide post and is far away from the front die.

5. The core pulling structure according to claim 4, wherein the sliding block is a guide rail, the front mold is provided with two guide grooves, and the core pulling structure further comprises:

one end of each of the two guide rails is connected with the sliding block body, the other end of each of the two guide rails is arranged in the two guide grooves in a sliding mode, and the sliding directions of the two guide rails are parallel to the second direction.

6. The core pulling structure of claim 5, wherein the two guide grooves are formed in one end, away from the rear mold, of the front mold, the guide grooves are of an L-shaped structure, and the guide rails are of an L-shaped structure.

7. The core pulling structure according to claim 4, wherein the front mold is provided with two travel switches, the two travel switches are arranged at intervals, the slider body is provided with travel positioning grooves, the length directions of the positioning grooves are located in the second direction, and the core pulling structure further comprises:

the driving cylinder is arranged on the slider body, the travel switch is electrically connected with the driving cylinder, and the driving cylinder is used for driving the slider body to be close to or far away from the front die;

the trigger piece is arranged in the stroke positioning groove and is positioned between the two stroke switches;

the driving cylinder drives the slider body to be close to the front die, and when one end of the trigger piece, far away from the front die, abuts against one of the travel switches, the driving cylinder stops operating; the driving cylinder drives the slider body to be far away from the front die, and when one end, far away from the front die, of the trigger piece abuts against the other travel switch, the driving cylinder stops operating.

8. The core pulling structure of claim 2, wherein a side of the slider body facing the front mold is provided with a limit pull rod mechanism for limiting a distance between the slider body and the front mold when the slider body is away from the front mold in the second direction.

9. The core pulling structure of claim 8, wherein the slider body is provided with a limiting groove, the groove bottom of the limiting groove is provided with a sliding hole penetrating through the slider body, and the limiting pull rod mechanism comprises:

the limiting pull rod is arranged in the sliding hole in a sliding mode, one end of the limiting pull rod is connected with the front die, and a limiting gap is reserved between one end, far away from the sliding block body, of the limiting pull rod and the bottom of the limiting groove;

when the slider body is far away from the front die in the second direction for a certain distance, one end of the limiting pull rod, far away from the slider body, is abutted against the bottom of the limiting groove.

10. An automobile bumper mold, characterized by comprising the core-pulling structure as claimed in any one of claims 1 to 9, the medical device further comprising:

and the driving assembly is arranged on the front mold and is used for driving the core-pulling structure to be away from the front mold in the second direction.

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