CN217514412U - Injection mold positioning mechanism and injection mold - Google Patents

Abstract

The application provides an injection mold positioning mechanism and an injection mold, relates to the field of mold design, and is used for positioning hardware with injection molding holes in a molding cavity; the fixed die positioning piece is connected with the fixed die core in a sliding manner, can extend into or leave the molding cavity and can be inserted into the injection hole when extending into the molding cavity; the movable mould positioning piece is connected with the movable mould core and used for abutting the hardware on the movable mould core. The hardware is convenient and reliable to position, and the molding quality of the plastic part is high.

Description

Injection mold positioning mechanism and injection mold

Technical Field

The utility model relates to a mold design field particularly, relates to an injection mold positioning mechanism and injection mold.

Background

At present, when some products are subjected to injection molding, hardware and the products are required to be directly subjected to injection molding in the products. Because the structure of current hardware is all comparatively complicated, place the hardware behind the shaping chamber, need fix a position the hardware and just can accomplish the operation of moulding plastics smoothly in the shaping chamber. Among the prior art, directly set up the constant head tank on deciding the mold core, with the hardware joint in the constant head tank.

The inventor researches and discovers that the existing injection mold has the following defects when molding a plastic part containing hardware:

the hardware is manually placed into the positioning groove, and due to the complex structure of the hardware, the number of contact surfaces between the positioning groove and the hardware is large, injection molding operation can be carried out only by ensuring that each surface is positioned, so that the positioning efficiency is low, the labor intensity is high, and the cost is high; meanwhile, the groove wall of the positioning groove is used for positioning, the hardware is vertically arranged and is easy to fall off from the positioning groove, the position of the hardware is inaccurate, and the hardware is damaged during die assembly; and during injection molding, flash is easy to generate, and the molding quality of the plastic part is affected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an injection mold positioning mechanism and injection mold, its location degree of difficulty that can reduce the hardware improves efficiency, and the location of hardware is effectual, the high quality of moulding plastics.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides an injection mold positioning mechanism for to have the hardware in the hole of moulding plastics to be located the shaping intracavity, include:

the fixed die core and the movable die core are slidably matched in the die opening and closing direction, and can jointly define a molding cavity when the dies are closed; the fixed die positioning piece is slidably connected with the fixed die core, the fixed die positioning piece can extend into or leave the molding cavity, and the fixed die positioning piece can be inserted into the injection hole when extending into the molding cavity; the movable mould positioning piece is connected with the movable mould core and used for abutting hardware on the movable mould core.

In an alternative embodiment, the fixed mold positioning piece or the movable mold positioning piece is provided as a pogo pin.

In an optional implementation manner, the injection mold positioning mechanism further comprises a driving assembly, and the driving assembly is connected with the fixed mold positioning piece and is used for driving the fixed mold positioning piece to move relative to the fixed mold core, so that the fixed mold positioning piece is switched between positions of extending into the molding cavity and leaving the molding cavity.

In an optional embodiment, the driving assembly comprises a first elastic piece, a driving plate and a fixed die ejector pin, wherein one end of the first elastic piece is connected with the driving plate, and the other end of the first elastic piece is used for abutting against the fixed die plate; the fixed die ejector pin is connected with the drive plate, and the fixed die ejector pin is slidably connected with the fixed die core; the fixed die thimble is used for abutting against the movable die core; the first elastic piece is used for enabling the fixed die ejector pin to have a movement trend of extending into the forming cavity.

In an optional embodiment, a first groove for forming the molding cavity is formed in one side, close to the movable mold core, of the fixed mold core, and a first positioning groove is formed in one side, far away from the movable mold core, of the fixed mold core; a first slide way is arranged on the fixed die core, and two ends of the first slide way respectively penetrate through the bottom wall of the first groove and the bottom wall of the first positioning groove; the driving plate is slidably arranged in the first positioning groove, and the fixed die ejector pin slidably penetrates through the first slide way;

the driving plate can be abutted against the bottom wall of the first positioning groove under the action of the elastic piece.

In an optional implementation mode, the number of the fixed die positioning pieces is multiple, the fixed die positioning pieces are all slidably connected with the fixed die core, and the fixed die positioning pieces can be inserted into the corresponding injection molding holes when extending into the molding cavity.

In an optional embodiment, the injection mold positioning mechanism further comprises a second elastic member and a mounting plate, wherein one end of the second elastic member is connected with the mounting plate, and the other end of the second elastic member is used for abutting against the movable mold plate; the movable mould positioning piece is connected with the mounting plate.

In an optional embodiment, a second groove for forming the molding cavity is formed in one side of the movable mold core close to the fixed mold core, a second positioning groove is formed in one side of the movable mold core far away from the fixed mold core, and a second slide way for communicating the second groove and the second positioning groove is formed in the movable mold core; the mounting plate is slidably arranged in the second positioning groove, and the movable die positioning piece slidably penetrates through the second slide way;

the mounting panel can be in under the effect of second elastic component the butt in the cell bottom wall of second constant head tank.

In an optional embodiment, the number of the movable mold positioning pieces is multiple and the movable mold positioning pieces are arranged at intervals.

In a second aspect, the utility model provides an injection mold, injection mold includes:

a fixed mold plate, a movable mold plate, a guide mechanism and the injection mold positioning mechanism of any of the foregoing embodiments; the fixed die core is connected with the fixed die plate, and the movable die core is connected with the movable die plate; the fixed template is connected with the movable template in a sliding way through the guide mechanism.

The embodiment of the utility model provides a beneficial effect is:

to sum up, the injection mold positioning mechanism that this embodiment provided, the die sinking back, makes the part of cover half setting element stretch into the position department corresponding to the shaping chamber on the cover half benevolence, then, docks injection molding hole and cover half setting element on the hardware, hangs the hardware on the cover half setting element, accomplishes the first location of hardware. Then carry out the compound die operation, movable mould benevolence is close to the motion of cover half benevolence, movable mould setting element on the cover half benevolence contacts with the hardware earlier, then promote the hardware and be close to the motion of cover half benevolence, and at this in-process, the cover half setting element is synchronous towards the direction motion that leaves the shaping chamber, after the compound die is accomplished, the movable mould setting element just with the hardware butt on cover half benevolence, and the in-process of hardware butt on cover half benevolence, rely on the cover half setting element to play the effect of direction, the hardware can not rotate and the skew for the cover half benevolence, the position of hardware is accurate reliable, be difficult for having the problem that the hardware that the compound die in-process hardware position change caused is crushed and influence the shaping quality of follow-up injection moulding product. Mould plastics and accomplish the back die sinking, the cover half setting element can move towards drawing of patterns direction along with the hardware together, and after the die sinking, the cover half setting element is in the position of the hardware of undetermining again, is convenient for carry out the operation of moulding plastics of next product.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.

Fig. 1 is a schematic structural view of an injection mold positioning mechanism according to an embodiment of the present invention;

FIG. 2 is a schematic view of a part of the positioning mechanism of the injection mold according to the embodiment of the present invention;

fig. 3 is a schematic structural view of a core insert according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a movable mold core according to an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of the structure shown at A in FIG. 4;

fig. 6 is a schematic structural view of an injection mold according to an embodiment of the present invention.

Icon:

001-hardware; 011-injection molding holes; 100-fixing the mold core; 110-a first groove; 120-a first slide; 130-a second slide; 200-moving die core; 210-a second groove; 220-a third slide; 300-fixing a mould positioning piece; 400-moving die positioning piece; 500-a drive assembly; 510-a first resilient member; 520-a drive plate; 530-fixed mold thimble; 600-a second elastic member; 700-mounting a plate; 002-fixing a template; 003-moving the template.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

At present, when will mould plastics and hardware 001 and utilize injection mold to mould plastics together, locate the constant head tank on deciding the mold core with hardware 001 utilization and fix a position, because hardware 001 structure is complicated, the side that needs the location is more, among the prior art, adopts six sides on the hardware 001 to fix a position. So, six sides that need guarantee hardware 001 all are in the correct position, and the operation degree of difficulty that hardware 001 put into the constant head tank is big, and easily exists the unsafe condition in location to influence the quality of moulding plastics. In some injection molds which perform mold opening and closing actions in the horizontal direction, the fixed mold core and the movable mold core are both horizontally arranged, and the movable mold core moves close to or away from the fixed mold core in the horizontal direction. So, when hardware 001 was fixed a position in the constant head tank, hardware 001 dropped for vertical setting in the constant head tank easily, need the repeated operation of fixing a position, intensity of labour is high, and is efficient.

In view of this, designers have designed an injection mold positioning mechanism, which can reduce the positioning difficulty of the hardware 001 and improve the efficiency, and the hardware 001 has a good positioning effect and high injection molding quality.

Referring to fig. 1-4, in the present embodiment, the injection mold positioning mechanism includes a fixed mold core 100, a movable mold core 200, a fixed mold positioning element 300 and a movable mold positioning element 400, wherein the fixed mold core 100 and the movable mold core 200 are slidably engaged in a mold opening and closing direction, and the two can define a molding cavity together when closing the mold; the fixed die positioning piece 300 is slidably connected with the fixed die core 100, the fixed die positioning piece 300 can extend into or leave the molding cavity, and the fixed die positioning piece 300 can be inserted into the injection molding hole 011 when extending into the molding cavity; the movable mold positioning element 400 is connected to the movable mold core 200, and is used for abutting the hardware 001 against the movable mold core 200.

The operating principle of the injection mold positioning mechanism provided by the embodiment is as follows:

after the mold is opened, the part of the fixed mold positioning piece 300 extends into the position, corresponding to the molding cavity, on the fixed mold core 100, then, the injection molding hole 011 on the hardware 001 is in butt joint with the fixed mold positioning piece 300, the hardware 001 is hung on the fixed mold positioning piece 300, and the primary positioning of the hardware 001 is completed. Then carry out the compound die operation, movable mould benevolence 200 is close to the motion of cover half benevolence 100, movable mould setting element 400 on the cover half benevolence 100 contacts with hardware 001 earlier, then promote hardware 001 and be close to the motion of cover half benevolence 100, and at this in-process, cover half setting element 300 moves towards the direction that leaves the shaping chamber in step, after the compound die is accomplished, movable mould setting element 400 just with hardware 001 butt on cover half benevolence 100, and hardware 001 butt on cover half benevolence 100 in-process, rely on cover half setting element 300 to play the effect of direction, hardware 001 can not rotate and the skew for cover half benevolence 100, the position of hardware 001 is accurate reliable, be difficult for having the problem that hardware 001 that the change of compound die in-process hardware 001 position caused is crushed and influences the shaping quality of follow-up injection moulding product. Mould plastics and accomplish back die sinking, cover half setting element 300 can move towards the drawing of patterns direction along with hardware 001, and after the die sinking, cover half setting element 300 is in the position of hardware 001 yet to be positioned again, is convenient for carry out the operation of moulding plastics of next product.

In this embodiment, the hardware 001 has various structures, and in this embodiment, one hardware 001 is taken as an example for description. This hardware 001 is the rectangular shaped plate, and hardware 001 is roughly the zigzag and extends, and the both sides on the length direction of hardware 001 all are provided with two lugs, are provided with two injection molding holes 011 that arrange on the length direction of hardware 001 on every lug. That is, hardware 001 has eight injection holes 011 therein. And, each injection hole 011 is a circular hole.

In this embodiment, optionally, a first groove 110 for forming a molding cavity is disposed on one side of the fixed mold core 100 close to the movable mold core 200, and a first positioning groove is disposed on one side of the fixed mold core 100 away from the movable mold core 200; the cavity insert 100 is provided with four first slides 120 and two second slides 130, two ends of each first slide 120 respectively penetrate through the bottom wall of the first groove 110 and the bottom wall of the first positioning groove, and two ends of each second slide 130 respectively penetrate through the bottom wall of the first groove 110 and the bottom wall of the first positioning groove. That is, both ends of each of the first and second runners 120 and 130 are respectively positioned on the bottom wall of the first recess 110 and the bottom wall of the first positioning groove, and the first and second runners 120 and 130 are arranged in parallel, each extending in the thickness direction of the fixed mold core 100.

In order to realize the matching of the movement of the fixed mold positioning element 300 and the mold opening and closing action, optionally, the fixed mold positioning element 300 realizes the automatic movement through the driving assembly 500. The driving assembly 500 includes two first elastic members 510, a driving plate 520 and four stationary mold ejector pins 530, one end of each first elastic member 510 is connected to the driving plate 520, and the other end is used for abutting against the stationary mold plate 002. The driving plate 520 is a rectangular plate, the driving plate 520 is embedded in the first positioning groove, one end of each of the four stationary mold ejector pins 530 is connected to the driving plate 520, the four stationary mold ejector pins 530 respectively penetrate through the four first slideways 120 of the stationary mold core 100 in a one-to-one correspondence manner, each stationary mold ejector pin 530 is slidably connected to the corresponding first slideway 120, and the sliding direction is the mold opening and closing direction. Meanwhile, the end of the fixed mold thimble 530 away from the driving plate 520 can extend into the first groove 110 or leave the first groove 110, that is, in the mold opening state, the fixed mold thimble 530 can extend into the first groove 110, and in the mold closing process, the fixed mold thimble 530 abuts against the movable mold core 200, so that the fixed mold thimble 530 leaves the first groove 110 through the movable mold core 200 and retracts into the first slide 120. The first elastic member 510 is provided as a spring, and the first elastic member 510 is used for making the fixed mold thimble 530 have a movement tendency to extend into the molding cavity. After the mold is opened, under the elastic force of the first elastic piece 510, the driving plate 520 moves close to the bottom wall of the first positioning groove and jacks up the plastic piece to realize demolding, and meanwhile, the fixed mold positioning piece 300 moves together with the driving plate 520 and extends into the first groove 110, so that the new hardware piece 001 can be positioned conveniently. After the mold is opened, the driving plate 520 just abuts against the bottom wall of the first positioning groove, so that the length of the fixed mold positioning piece 300 extending into the first groove 110 is limited.

It should be noted that the fixed mold positioning member 300 is configured as a pogo pin.

Optionally, the number of the fixed die positioning pieces 300 is two, the two fixed die positioning pieces 300 are arranged at intervals and are respectively used for being in plug-in fit with the two injection molding holes 011 in the eight injection molding holes 011, the hardware 001 is more accurately positioned, and the position is firmer and more reliable.

Referring to fig. 5, in the present embodiment, optionally, a second groove 210 for forming a molding cavity is disposed on one side of the movable mold core 200 close to the cavity block 100, a second positioning groove is disposed on one side of the movable mold core 200 away from the cavity block 100, four third slide ways 220 for simultaneously communicating the second groove 210 and the second positioning groove are disposed on the movable mold core 200, and the four third slide ways 220 are independently disposed.

In this embodiment, optionally, the injection mold positioning mechanism further includes two second elastic members 600 and a mounting plate 700, one end of each of the two second elastic members 600 is connected to the mounting plate 700, and the other end of each of the two second elastic members 600 is used for abutting against the movable mold plate 003, so that the mounting plate 700 has a tendency to move close to the bottom wall of the second positioning groove. The mounting plate 700 is a rectangular plate, and the mounting plate 700 is slidably disposed in the second positioning groove of the movable mold core 200. The quantity of movable mould setting element 400 is four, and the one end of four movable mould setting elements 400 all is connected with mounting panel 700 to four movable mould setting elements 400 respectively the one-to-one wear to establish in four third slides 220, the tip of movable mould setting element 400 can the butt on hardware 001, thereby with hardware 001 butt on decide mould benevolence 100.

It should be appreciated that the movable mold positioning member 400 may be configured as a pogo pin.

In addition, both the first elastic member 510 and the second elastic member 600 may be provided as springs.

In this embodiment, during loading, the mold is first opened, and under the action of the first elastic member 510 and the second elastic member 600, the fixed mold positioning member 300 extends into the first recess 110 and has a length of about 5mm, and the movable mold positioning member 400 extends into the second recess 210 and has a length of about 2.2 mm. After the hardware 001 is hung on the two fixed die positioning pieces 300 by utilizing the two injection molding holes 011 on the hardware, and the two fixed die positioning pieces 300 are matched to play a role in positioning and guiding. In the die closing process, the movable die positioning piece 400 contacts the hardware 001, meanwhile, the movable die core 200 contacts the fixed die ejector pin 530, the movable die core 200 drives the fixed die ejector pin 530 to retract into the first slide way 120, in the process, the hardware 001 moves close to the fixed die core 100, and after the die closing is completed, the four movable die positioning pieces 400 are matched to press the hardware 001 onto the fixed die core 100 to complete the positioning. In the whole process, the position of the hardware 001 is always limited by the fixed die positioning piece 300 and the movable die positioning piece 400, and the position is accurate and reliable. And after the die assembly is completed, when the fixed die thimble 530 just exits from the molding cavity, the fixed die positioning piece 300 also exits from the molding cavity at the same time to participate in blocking the first slide way 120 and the second slide way 130, so that the integrity of the molding cavity is ensured. After the mold is closed, the first elastic member 510 and the second elastic member 600 are compressed, and the fixed mold positioning member 300 and the movable mold positioning member 400 do not extend into the molding cavity, so that the molding of the plastic member is not affected. After the mold opening is completed, the plastic part is jacked up under the action of the first elastic part 510 and the second elastic part 600, so that the mold is conveniently released.

The injection mold positioning mechanism that this embodiment provided can reduce the location degree of difficulty of hardware 001, raises the efficiency, and the location effect of hardware 001 is good, the high quality of moulding plastics.

Referring to fig. 6, the embodiment further provides an injection mold, which includes a fixed mold plate 002, a movable mold plate 003, a guiding mechanism (not shown), and an injection mold positioning mechanism; the fixed mold core 100 is connected with the fixed mold plate 002, and the movable mold core 200 is connected with the movable mold plate 003; the fixed die plate 002 is slidably connected to the movable die plate 003 via a guide mechanism.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An injection mold positioning mechanism for positioning hardware (001) having an injection hole (011) within a molding cavity, comprising:

the die comprises a fixed die core (100), a movable die core (200), a fixed die positioning piece (300) and a movable die positioning piece (400), wherein the fixed die core (100) and the movable die core (200) are slidably matched in the die opening and closing direction, and the fixed die core (100) and the movable die core (200) can jointly define a forming cavity during die closing; the fixed die positioning piece (300) is connected with the fixed die core (100) in a sliding mode, the fixed die positioning piece (300) can stretch into or leave the molding cavity, and the fixed die positioning piece (300) can be inserted into the injection molding hole (011) when stretching into the molding cavity; the movable mould positioning piece (400) is connected with the movable mould core (200) and used for abutting the hardware (001) on the movable mould core (200).

2. The injection mold positioning mechanism of claim 1, wherein:

the fixed die positioning piece (300) or the movable die positioning piece (400) is arranged to be a spring needle.

3. The injection mold positioning mechanism of claim 1, wherein:

the injection mold positioning mechanism further comprises a driving assembly (500), wherein the driving assembly (500) is connected with the fixed mold positioning piece (300) and used for driving the fixed mold positioning piece (300) to move relative to the fixed mold core (100) so that the fixed mold positioning piece (300) can stretch into the molding cavity and leave the molding cavity to be switched between positions.

4. The injection mold positioning mechanism of claim 3, wherein:

the driving assembly (500) comprises a first elastic piece (510), a driving plate (520) and a fixed die thimble (530), one end of the first elastic piece (510) is connected with the driving plate (520), and the other end of the first elastic piece is used for abutting against a fixed die plate (002); the fixed die thimble (530) is connected with the drive plate (520), and the fixed die thimble (530) is slidably connected with the fixed die core (100); the fixed die thimble (530) is used for abutting against the movable die core (200); the first elastic piece (510) is used for enabling the fixed die ejector pin (530) to have a movement trend of extending into the forming cavity.

5. An injection mold positioning mechanism as recited in claim 4, wherein:

a first groove (110) for forming the forming cavity is formed in one side, close to the movable mold core (200), of the fixed mold core (100), and a first positioning groove is formed in one side, far away from the movable mold core (200), of the fixed mold core (100); a first slide way (120) is arranged on the fixed die core (100), and two ends of the first slide way (120) respectively penetrate through the bottom wall of the first groove (110) and the bottom wall of the first positioning groove; the driving plate (520) is slidably arranged in the first positioning groove, and the fixed die thimble (530) is slidably arranged in the first slide way (120) in a penetrating way;

the driving plate (520) can be abutted against the bottom wall of the first positioning groove under the action of the elastic piece.

6. The injection mold positioning mechanism of claim 1, wherein:

the number of the fixed die positioning pieces (300) is multiple, the fixed die positioning pieces (300) are all connected with the fixed die core (100) in a sliding mode, and the fixed die positioning pieces (300) can be inserted into the corresponding injection molding holes (011) when extending into the molding cavity.

7. The injection mold positioning mechanism of claim 1, wherein:

the injection mold positioning mechanism further comprises a second elastic piece (600) and a mounting plate (700), one end of the second elastic piece (600) is connected with the mounting plate (700), and the other end of the second elastic piece is used for being abutted to the movable mold plate (003); and the movable mould positioning piece (400) is connected with the mounting plate (700).

8. An injection mold positioning mechanism as recited in claim 7, wherein:

a second groove (210) for forming the molding cavity is formed in one side, close to the cavity block (100), of the movable mold core (200), a second positioning groove is formed in one side, far away from the cavity block (100), of the movable mold core (200), and a second slide way for communicating the second groove (210) with the second positioning groove is formed in the movable mold core (200); the mounting plate (700) is slidably arranged in the second positioning groove, and the movable mold positioning piece (400) slidably penetrates through the second slide way;

the mounting plate (700) can abut against the bottom wall of the second positioning groove under the action of the second elastic piece (600).

9. The injection mold positioning mechanism of claim 1, wherein:

the number of the movable mould positioning pieces (400) is multiple and the movable mould positioning pieces are arranged at intervals.

10. An injection mold, comprising:

-a stationary mold plate (002), a movable mold plate (003), a guiding mechanism and an injection mold positioning mechanism according to any one of claims 1 to 9; the fixed die core (100) is connected with the fixed die plate (002), and the movable die core (200) is connected with the movable die plate (003); the fixed die plate (002) is connected with the movable die plate (003) in a sliding mode through the guide mechanism.

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