CN215903907U - Mold core-pulling mechanism - Google Patents

Abstract

The utility model provides a mold core-pulling mechanism, and relates to the technical field of molds. The mold core pulling mechanism comprises a mold component and a core pulling component; the mold assembly comprises a movable mold plate, a fixed mold plate and a hot runner fixing plate which are sequentially stacked in the vertical direction, and the hot runner fixing plate is used for driving the fixed mold plate to vertically move upwards relative to the movable mold plate after vertically moving upwards for a certain distance relative to the fixed mold plate in the mold opening process; the core pulling assembly comprises an inclined guide post and a core pulling slide block, the inclined guide post is arranged on the hot runner fixing plate, the core pulling slide block is slidably arranged on the fixed die plate, and the inclined guide post is used for pushing the core pulling slide block to slide on the fixed die plate under the driving of the hot runner fixing plate in the vertical upward movement process of the hot runner fixing plate relative to the fixed die plate. The die core-pulling mechanism provided by the utility model has the advantages of higher production efficiency and lower production cost.

Description

Mold core-pulling mechanism

Technical Field

The utility model relates to the technical field of molds, in particular to a mold core-pulling mechanism.

Background

In the process of injection molding by using a mold, core-pulling treatment needs to be performed on the parts such as holes, buckles and the like designed on a molded product before mold opening.

At present, an oil cylinder is generally adopted in the market for core pulling, and the mold opening is carried out after the core pulling is finished. Core pulling and die sinking are carried out in sequence step by step, so that the production efficiency is low, extra energy consumption is increased by adopting the oil cylinder, and the cost is overhigh.

SUMMERY OF THE UTILITY MODEL

The utility model solves the problems of low production efficiency and overhigh cost in the prior art.

In order to solve the problems, the utility model provides a mold core pulling mechanism which can synchronously perform core pulling and mold opening, has higher production efficiency, and adopts a mechanical structure to replace an oil cylinder, so that the cost is lower.

The embodiment of the utility model provides a mold core-pulling mechanism, which comprises a mold component and a core-pulling component, wherein the mold component comprises a mold core and a mold core;

the mold assembly comprises a movable mold plate, a fixed mold plate and a hot runner fixing plate which are sequentially stacked in the vertical direction, and the hot runner fixing plate is used for driving the fixed mold plate to vertically move upwards relative to the movable mold plate after vertically moving upwards for a certain distance relative to the fixed mold plate in the mold opening process;

the core pulling assembly comprises an inclined guide post and a core pulling sliding block, the inclined guide post is arranged on the hot runner fixing plate, the core pulling sliding block is slidably arranged on the fixed die plate, and the inclined guide post is used for pushing the core pulling sliding block to slide on the fixed die plate under the driving of the hot runner fixing plate in the process that the hot runner fixing plate is opposite to the fixed die plate and vertically moves upwards.

According to the mold core pulling mechanism provided by the embodiment of the utility model, in the mold opening process, when the hot runner fixing plate vertically moves upwards relative to the fixed mold plate, the inclined guide post is driven to push the core pulling slide block on the fixed mold plate to move, so that core pulling is realized. Namely, the core pulling is completed in the die opening process, the production efficiency is greatly improved, the traditional design of an oil cylinder is omitted, the extra energy consumption is avoided, and the production cost is saved.

In an optional embodiment, the mold assembly further includes a limit screw, a limit hole is formed in the fixed mold plate in a penetrating manner, one end of the limit screw penetrates through the limit hole to be in threaded fit with the hot runner fixing plate, and the limit screw is used for driving the fixed mold plate to vertically move upwards after sliding for a certain distance in the limit hole under the driving of the hot runner fixing plate in the mold opening process.

In the process that the hot runner fixing plate vertically moves upwards relative to the positioning plate, the screw rod relatively slides in the limiting hole, and in the process, the hot runner fixing plate drives the inclined guide post to push the core pulling slide block to slide, so that automatic core pulling is realized. When the screw rod slides in the limiting hole until the screw cap abuts against the outer peripheral wall of the limiting hole, the hot runner fixing plate continues to move upwards to drive the fixing template on the screw rod, and the die opening is realized.

In an optional embodiment, the core pulling slider is provided with an accommodating hole, one end of the inclined guide post is connected with the hot runner fixing plate, and one end of the inclined guide post, which is far away from the hot runner fixing plate, extends obliquely downwards and extends into the accommodating hole.

One end of the inclined guide post extends into the containing hole formed in the core-pulling sliding block, and in the process of vertical upward movement of the inclined guide post under the driving of the hot runner fixing plate, the inclined guide post is in contact with the hole wall of the containing hole and slides relatively, so that the core-pulling sliding block is pushed to slide on the fixed die plate, and the automatic core pulling in the die opening process is realized.

In an optional implementation manner, the core pulling assembly further comprises a reset shovel base, the reset shovel base is arranged on the hot runner fixing plate, a first inclined plane is arranged on the reset shovel base, a second inclined plane is arranged on the core pulling slider, and the first inclined plane is used for being attached to and sliding relative to the second inclined plane in the mold closing process so as to push the core pulling slider to reset.

In the mold closing process, the first inclined surface of the reset shovel base is attached to the second inclined surface arranged on the core-pulling slide block and slides relatively, and the core-pulling slide block is pushed to automatically reset in the mold closing process.

In an optional embodiment, the fixed die plate is provided with a guide chute extending in a horizontal plane, the core pulling slider is in sliding fit with the guide chute, and an extending direction of a vertical projection of the inclined guide post on the fixed die plate is parallel to an extending direction of the guide chute.

In an optional embodiment, the core pulling assembly further comprises a pressing strip, the pressing strip is connected with the fixed die plate, the extending direction of the pressing strip is the same as the extending direction of the guide sliding groove, and the pressing strip is used for limiting the core pulling sliding block to be vertically separated from the guide sliding groove upwards.

In an optional embodiment, a loose core is arranged at one end of the loose core slide block in the extending direction of the guide chute.

In an optional embodiment, the mold core pulling mechanism further includes a locking assembly, the locking assembly is respectively connected to the movable mold plate, the fixed mold plate and the hot runner fixing plate, and the locking assembly is used for locking the fixed mold plate and the movable mold plate and releasing the locking of the fixed mold plate and the movable mold plate under the driving of the hot runner fixing plate in the mold opening process.

In the process that the hot runner fixing plate vertically moves upwards relative to the fixed template, the locking assembly is driven to release the locking of the fixed template and the fixed template, so that the fixed template and the movable template can be driven to be separated in the continuous movement process of the hot runner fixing plate, and the die opening is realized.

In an optional implementation manner, the locking assembly includes a button machine stopper, an elastic member, a button machine and a button machine guide block, a storage groove is formed in a side wall of the fixed die plate, the button machine stopper is in sliding fit with the storage groove, the elastic member is accommodated in the storage groove and used for pushing a part of the button machine stopper to extend out of the storage groove, the button machine is connected with the movable die plate, the button machine and a part of the button machine stopper extending out of the storage groove are buckled, the button machine guide block is connected with the hot runner fixing plate, and the button machine guide block is used for moving vertically upwards relative to the fixed die plate under the driving of the hot runner fixing plate in a die opening process so as to push the button machine stopper to retract into the storage groove, so that the button machine and the button machine stopper are buckled.

In an optional implementation manner, a third inclined plane is arranged on the button machine stop block, a fourth inclined plane is arranged on the button machine guide block, and the third inclined plane is attached to the fourth inclined plane and slides relatively in the mold opening process so as to push the button machine stop block to retract into the accommodating groove.

In an optional embodiment, one end of the button machine guide block is connected to a side wall of the hot runner fixing plate, one end of the button machine guide block, which is far away from the hot runner fixing plate, extends vertically and downwards to the movable mold plate, a groove extending in the vertical direction is formed in the button machine guide block, and the button machine is accommodated in the groove.

Drawings

Fig. 1 is a schematic structural diagram of a mold core-pulling mechanism according to an embodiment of the present invention;

FIG. 2 is a partial cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of a connection structure of the hot runner fixing plate and the core pulling assembly in FIG. 2;

FIG. 4 is a schematic view of a connection structure of the fixed die plate and the core pulling assembly in FIG. 2

FIG. 5 is a schematic structural view of the core back assembly of FIG. 2 in a clamped state;

FIG. 6 is a schematic view of the latch assembly of FIG. 2 in a clamped condition;

fig. 7 is an exploded view of the latch assembly.

Description of reference numerals:

100-a mold core-pulling mechanism; 110-a mold assembly; 111-moving the template; 113-fixing a template; 1131-a guide chute; 115-hot runner fixing plate; 117-limit screw; 130-a core pulling assembly; 131-an inclined guide post; 132-a mount; 133-core pulling slide block; 1331-containing holes; 1333-a second inclined plane; 135-pressing strips; 137-resetting shovel base; 1371-a first inclined plane; 139-a stop; 150-a locking assembly; 151-button machine stopper; 1511-third inclined plane; 152-a resilient member; 153-fastener machine; 154-sear guide block; 1541-fourth slope; 1543-groove; 155-fastening machine fixing block; 156-briquetting.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a mold core-pulling mechanism 100 according to the present embodiment, and fig. 2 is a partial cross-sectional view of the mold core-pulling mechanism 100 according to the present embodiment.

The present embodiment provides a mold core pulling mechanism 100, which includes a mold assembly 110, a core pulling assembly 130, and a locking assembly 150, where the mold assembly 110 includes a movable mold plate 111, a fixed mold plate 113, and a hot runner fixing plate 115, and the movable mold plate 111, the fixed mold plate 113, and the hot runner fixing plate 115 are stacked in sequence in a vertical direction, that is, the movable mold plate 111 is located at the bottommost layer, and the fixed mold plate 113 is located between the movable mold plate 111 and the hot runner fixing plate 115. The core pulling assembly 130 and the locking assembly 150 are respectively arranged on the mold assembly 110, the core pulling assembly 130 is used for automatically pulling cores in the mold opening process of the mold assembly 110, and the locking assembly 150 is used for unlocking the fixed mold plate 113 and the movable mold plate 111 in the mold opening process.

The mold core pulling mechanism 100 provided by this embodiment, in fact, the mold core pulling mechanism further includes an ejector plate of a conventional setting, in the mold opening process, the hot runner fixing plate 115 of the mold assembly 110 moves vertically upward under the pushing action of a return pin on the ejector plate, or the hot runner fixing plate 115 is driven by other driving devices to move vertically upward relative to the fixed mold plate 113, after the hot runner fixing plate 115 moves vertically upward relative to the fixed mold plate 113 by a moving distance, the core pulling assembly 130 is driven to complete core pulling, and the locking assembly 150 is driven to complete unlocking, and then the vertical upward movement is continued, the fixed mold plate 113 is driven to move vertically upward relative to the movable mold plate 111, and mold opening is completed.

The mold assembly 110 further includes a limit screw 117, in this embodiment, a limit hole (not shown) is vertically formed through the fixed mold plate 113, and an end of the limit screw 117, which is not provided with a nut, vertically penetrates through the limit hole upward to be in threaded connection with the hot runner fixing plate 115. The cross-sectional area of the nut of the limit screw 117 is larger than the orifice area of the limit hole, and a certain distance exists between the nut of the limit screw 117 and the orifice of the limit hole in the die closing state.

In the mold opening process, the hot runner fixing plate 115 vertically moves upwards to drive the limit screw 117 to vertically move upwards in the limit hole, and the fixed mold plate 113 is lifted after the nut of the limit screw 117 contacts with the outer wall of the orifice of the limit hole, so that the fixed mold plate 113 is driven to vertically move upwards. Since the core-pulling assembly 130 has completed core pulling and the locking assembly 150 has also completed unlocking before that, the fixed die plate 113 is separated from the movable die plate 111 under the lifting action of the limit screw 117, and the die opening is realized.

It should be noted that, in other embodiments, other limiting assemblies may be used to replace the matching between the limiting screw 117 and the limiting hole, so that the hot runner fixing plate 115 has a certain vertical upward moving stroke relative to the fixed die plate 113.

Referring to fig. 3 and 4, fig. 3 is a schematic view illustrating a connection structure of the hot runner fixing plate 115 and the core pulling assembly 130, and fig. 4 is a schematic view illustrating a connection structure of the stationary platen 113 and the core pulling assembly 130.

The core pulling assembly 130 includes an inclined guide post 131 and a core pulling slider 133, the inclined guide post 131 is disposed on the hot runner fixing plate 115, and in fact, in this embodiment, the inclined guide post 131 is screwed with the hot runner fixing plate 115 through a mounting seat 132. The core-pulling slider 133 is slidably disposed on the fixed mold plate 113, and the inclined guide post 131 is used for pushing the core-pulling slider 133 to slide on the fixed mold plate 113 under the driving of the hot runner fixing plate 115 in the process of vertical upward movement of the hot runner fixing plate 115 relative to the fixed mold plate 113.

Be provided with the core of loosing core that stretches into the cavity of moulding plastics on the slider 133 of loosing core, at actual die sinking in-process, the vertical upward movement of the relative fixed die plate 113 of hot runner fixing plate 115, the vertical upward movement of guide pillar 131 drives oblique guide pillar 131 in the motion process, because there is certain contained angle to guide pillar 131 and vertical direction to one side, the in-process of the vertical upward movement of guide pillar 131 to loosing core, can apply the thrust that is the orientation of contained angle with vertical direction to the slider 133 of loosing core, thereby promote to loose core slider 133 and slide on fixed die plate 113, thereby drive to loose core and withdraw from the cavity of moulding plastics.

Referring to fig. 5, fig. 5 is a schematic structural diagram of the core back assembly 130 in a mold clamping state.

In this embodiment, the core pulling slider 133 is provided with a receiving hole 1331, one end of the inclined guide post 131 is connected to the hot runner fixing plate 115, and one end of the inclined guide post 131, which is far away from the hot runner fixing plate 115, extends obliquely downward and extends into the receiving hole 1331.

The slope of the accommodating hole 1331 is substantially the same as the slope of the tilt guide post 131, and the tilt guide post 131 is inserted into the accommodating hole 1331 in the mold-clamped state. During the mold opening process, the hot runner fixing plate 115 drives the inclined guide post 131 to move vertically upwards, and the inclined guide post 131 contacts with the wall of the containing hole 1331 and slides relatively, so as to push the core pulling slider 133 to slide. In other embodiments, the core back slide 133 may also be provided with other structures to cooperate with the inclined guide post 131, for example, an inclined end surface is provided to ensure that the end of the inclined guide post 131 away from the hot runner fixing plate 115 contacts the bottom end of the inclined surface in the mold clamping state.

In fact, in this embodiment, the upper surface of the fixed mold plate 113 is provided with a guide groove 1131 extending in the horizontal plane, the extending direction of the vertical projection of the inclined guide post 131 on the fixed mold plate 113 is parallel to the extending direction of the guide groove 1131, the core pulling assembly 130 further includes a pressing strip 135, the core pulling slider 133 is in sliding fit with the guide groove 1131, and the pressing strip 135 is used for limiting in the vertical direction, so as to prevent the core pulling slider 133 from being separated from the guide groove 1131 vertically upwards.

In the mold opening process, the hot runner fixing plate 115 drives the inclined guide post 131 to exit from the accommodating hole 1331, and since the extending direction of the vertical projection of the inclined guide post 131 on the fixed mold plate 113 is parallel to the extending direction of the guide chute 1131, the thrust in the extending direction of the guide chute 1131 is applied to the side wall of the accommodating hole 1331, so as to push the core pulling slider 133 to slide along the guide chute 1131.

Because the slider 133 of loosing core can slide to the one end of guide slot 1131 after the die sinking is accomplished, it withdraws from the injection molding cavity to drive the loose core, in order to realize the automatic re-setting of the slider 133 of loosing core in the compound die process, so that mould plastics next time, in this embodiment, the subassembly 130 of loosing core still includes the shovel base 137 that resets, the shovel base 137 that resets sets up on hot runner fixed plate 115, it is provided with first inclined plane 1371 on the shovel base 137 to reset, it is provided with second inclined plane 1333 on the slider 133 of loosing core, first inclined plane 1371 is used for pasting and relative slip with second inclined plane 1333 in the compound die process, it resets to promote the slider 133 of loosing core, thereby it stretches into the injection molding cavity to drive to loose core. In this embodiment, the core pulling and second inclined surfaces 1333 are respectively disposed at two ends of the core pulling slider 133 in the extending direction of the guide chute 1131.

In addition, in order to prevent the core-pulling slider 133 from sliding excessively along the guide sliding groove 1131, the core-pulling assembly 130 further includes a stopper 139, and the stopper 139 is disposed at an end of the guide sliding groove 1131 and is used for stopping the core-pulling slider 133 and limiting the core-pulling slider 133 in the guide sliding groove 1131.

Referring to fig. 6 and 7, fig. 6 is a schematic structural diagram of the locking assembly 150 in a mold clamping state, and fig. 7 is an exploded structural diagram of the locking assembly 150.

In this embodiment, the locking assembly 150 includes a catcher stop 151, an elastic member 152, a catcher 153, a catcher guide block 154, a catcher fixing block 155, and a pressing block 156. The side wall of the fixed mold plate 113 is provided with a receiving groove (not shown), and the locking device stopper 151 is in sliding fit with the receiving groove. The pressing block 156 is arranged in the accommodating groove, and the pressing block 156 bears the button machine stopper 151 so as to ensure that the button machine stopper 151 can smoothly slide in the accommodating groove. The elastic member 152 is received in the receiving groove for pushing the sear stop 151 to partially extend out of the receiving groove.

The button machine 153 is connected with the movable mold plate 111, the button machine 153 is buckled with the part of the button machine stop block 151 extending out of the accommodating groove, the button machine guide block 154 is connected with the hot runner fixing plate 115, and the button machine guide block 154 is used for moving vertically upwards relative to the fixed mold plate 113 under the driving of the hot runner fixing plate 115 in the mold opening process so as to push the button machine stop block 151 to retract into the accommodating groove, so that the button machine 153 is buckled with the button machine stop block 151. The button machine fixing block 155 is arranged on the fixed die plate 113 and plays a role in protecting the button machine guide block 154.

In this embodiment, a third inclined surface 1511 is disposed on a lower side of a portion of the sear stop block 151 extending out of the receiving groove, a fourth inclined surface 1541 is disposed on the sear guide block 154, and the third inclined surface 1511 is configured to engage with the fourth inclined surface 1541 and slide relative to each other during the mold opening process, so as to push the sear stop block 151 to retract into the receiving groove.

Moreover, one end of the sear guide block 154 is connected to the side wall of the hot runner fixing plate 115, one end of the sear guide block 154, which is away from the hot runner fixing plate 115, extends vertically and downwardly to the movable template 111, a groove 1543 extending in the vertical direction is formed in the sear guide block 154, the sear 153 is accommodated in the groove 1543, and a fourth inclined surface 1541 is formed at one end of the sear guide block 154, which is away from the hot runner fixing plate 115.

In practical application, in a mold closing state, the part of the button machine stopper 151 extends out of the receiving groove under the action of the elastic member 152, and the button machine 153 is engaged with the part of the button machine stopper 151 extending out of the receiving groove. In the mold opening process, the hot runner fixing plate 115 drives the inclined guide post 131 to move vertically upwards, the inclined guide post 131 contacts with the hole wall of the accommodating hole 1331 and slides relatively, so that the core-pulling slider 133 is pushed to slide, the core pulling is driven to gradually exit from the injection cavity, and in the process, a fourth inclined surface 1541 arranged on the button machine guide block 154 is gradually close to a third inclined surface 1511 arranged on the button machine stopper 151.

After the core-pulling slider 133 moves for a certain distance along the guide chute 1131, core pulling is completed, then along with the continuous vertical upward movement of the hot runner fixing plate 115 relative to the fixed die plate 113, the core-pulling slider 133 continues to slide along the guide chute 1131 until the fourth inclined surface 1541 arranged on the locking machine guide block 154 contacts with the third inclined surface 1511 arranged on the locking machine stopper 151, and then the core-pulling slider slides relatively, in this process, the locking machine stopper 151 is gradually pushed into the accommodating groove, and the elastic member 152 contracts. Before the nut of the limit screw 117 contacts with the outer wall of the orifice of the limit hole, the button machine 153 is disengaged from the button machine stopper 151, so that the fixed die plate 113 and the movable die plate 111 are unlocked, and the button machine moves continuously until the nut of the limit screw 117 contacts with the outer wall of the orifice of the limit hole, and then the fixed die plate 113 and the movable die plate 111 are separated under the lifting force of the limit screw 117, so that the die assembly is completed.

To sum up, the core pulling mechanism 100 of the mold provided by the embodiment realizes the automatic core pulling in the mold opening process by setting the core pulling assembly 130, and realizes the automatic unlocking in the mold opening process by setting the locking assembly 150, thereby greatly improving the production efficiency and saving the production cost.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (11)

1. The mold core pulling mechanism is characterized by comprising a mold component (110) and a core pulling component (130); the mold assembly (110) comprises a movable mold plate (111), a fixed mold plate (113) and a hot runner fixing plate (115), which are sequentially stacked in the vertical direction, wherein the hot runner fixing plate (115) is used for driving the fixed mold plate (113) to vertically move upwards relative to the movable mold plate (111) after vertically moving upwards relative to the fixed mold plate (113) for a certain distance in the mold opening process;

the core pulling assembly (130) comprises an inclined guide post (131) and a core pulling sliding block (133), the inclined guide post (131) is arranged on the hot runner fixing plate (115), the core pulling sliding block (133) is slidably arranged on the fixed die plate (113), and the inclined guide post (131) is used for pushing the core pulling sliding block (133) to slide on the fixed die plate (113) under the driving of the hot runner fixing plate (115) in the process that the hot runner fixing plate (115) moves vertically upwards relative to the fixed die plate (113).

2. The mold core pulling mechanism according to claim 1, wherein the mold assembly (110) further comprises a limit screw (117), a limit hole is formed in the fixed mold plate (113) in a penetrating manner, one end of the limit screw (117) penetrates through the limit hole to be in threaded fit with the hot runner fixing plate (115), and the limit screw (117) is used for driving the fixed mold plate (113) to move vertically and upwards after sliding for a certain distance in the limit hole under the driving of the hot runner fixing plate (115) in the mold opening process.

3. The mold core pulling mechanism according to claim 1, wherein the core pulling slider (133) is provided with a receiving hole (1331), one end of the inclined guide post (131) is connected to the hot runner fixing plate (115), and one end of the inclined guide post (131) away from the hot runner fixing plate (115) extends obliquely downward and extends into the receiving hole (1331).

4. The mold core pulling mechanism according to claim 1, wherein the core pulling assembly (130) further comprises a resetting shovel base (137), the resetting shovel base (137) is arranged on the hot runner fixing plate (115), a first inclined surface (1371) is arranged on the resetting shovel base (137), a second inclined surface (1333) is arranged on the core pulling slider (133), and the first inclined surface (1371) is attached to the second inclined surface (1333) in a mold closing process and slides relative to the second inclined surface to push the core pulling slider (133) to reset.

5. The mold core pulling mechanism according to any one of claims 1 to 4, wherein the fixed mold plate (113) is provided with a guide groove (1131) extending in a horizontal plane, the core pulling slider (133) is in sliding fit with the guide groove (1131), and an extending direction of a vertical projection of the inclined guide post (131) on the fixed mold plate (113) is parallel to an extending direction of the guide groove (1131).

6. The mold core pulling mechanism according to claim 5, wherein the core pulling assembly (130) further comprises a bead (135), the bead (135) is connected with the fixed mold plate (113), the extending direction of the bead (135) is the same as the extending direction of the guide chute (1131), and the bead (135) is used for limiting the core pulling slider (133) to be separated from the guide chute (1131) vertically and upwardly.

7. The mold core pulling mechanism according to claim 5, wherein one end of the core pulling slider (133) in the extending direction of the guide chute (1131) is provided with a core pulling.

8. The mold core-pulling mechanism according to any one of claims 1 to 4, characterized in that the mold core-pulling mechanism (100) further comprises a locking assembly (150), the locking assembly (150) is respectively connected with the movable mold plate (111), the fixed mold plate (113) and the hot runner fixing plate (115), and the locking assembly (150) is used for locking the fixed mold plate (113) and the movable mold plate (111) and unlocking the fixed mold plate (113) and the movable mold plate (111) under the driving of the hot runner fixing plate (115) during mold opening.

9. The mold core pulling mechanism according to claim 8, wherein the locking assembly (150) comprises a locking mechanism stopper (151), an elastic member (152), a locking mechanism (153) and a locking mechanism guide block (154), a receiving groove is formed on a side wall of the fixed mold plate (113), the locking mechanism stopper (151) is in sliding fit with the receiving groove, the elastic member (152) is received in the receiving groove and used for pushing a part of the locking mechanism stopper (151) to extend out of the receiving groove, the locking mechanism (153) is connected with the movable mold plate (111), the locking mechanism (153) is locked with a part of the locking mechanism stopper (151) extending out of the receiving groove, the locking mechanism guide block (154) is connected with the hot runner fixing plate (115), the locking mechanism guide block (154) is used for moving vertically upwards relative to the fixed mold plate (113) under the driving of the hot runner fixing plate (115) in the mold opening process, so as to push the button machine stop block (151) to retract into the accommodating groove, and the button machine (153) and the button machine stop block (151) are released from buckling.

10. The mold core-pulling mechanism according to claim 9, wherein a third inclined surface (1511) is provided on the sear stop (151), a fourth inclined surface (1541) is provided on the sear guide block (154), and the third inclined surface (1511) is adapted to abut against and slide relative to the fourth inclined surface (1541) during mold opening to push the sear stop (151) to retract into the receiving groove.

11. The mold core-pulling mechanism according to claim 9, wherein one end of the sear guide block (154) is connected to a side wall of the hot runner fixing plate (115), one end of the sear guide block (154) away from the hot runner fixing plate (115) extends vertically downward to the movable die plate (111), a groove (1543) extending in a vertical direction is provided on the sear guide block (154), and the sear (153) is accommodated in the groove (1543).

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