CN220180037U

CN220180037U - Mould locking structure of loosing core

Info

Publication number: CN220180037U
Application number: CN202321567798.9U
Authority: CN
Inventors: 张治安
Original assignee: Dongguan Shen An Plastic Mold Co ltd
Current assignee: Dongguan Shen An Plastic Mold Co ltd
Priority date: 2023-06-19
Filing date: 2023-06-19
Publication date: 2023-12-15
Anticipated expiration: 2033-06-19

Abstract

The utility model relates to the field of injection molds, in particular to a core-pulling locking structure of a mold. The key points of the technical scheme are as follows: the device comprises a movable module, a fixed module and a core pulling mechanism, wherein the movable module and the fixed module can be mutually opened and closed to form a cavity, the core pulling mechanism is arranged on the movable module and movably stretches into the cavity to participate in forming of a workpiece, and the device also comprises a locking mechanism, wherein the locking mechanism comprises a power assembly and is arranged on the fixed module; and the locking assembly is connected with the power assembly and is used for driving the locking assembly to stretch out and draw back, and when the core pulling mechanism is closed in the cavity, the power assembly drives the locking assembly to press the core pulling mechanism.

Description

Mould locking structure of loosing core

Technical Field

The utility model relates to the field of injection molds, in particular to a core-pulling locking structure of a mold.

Background

The injection mold is a plastic part forming tool. Firstly, melting the granular master batch into fluid in a heating mode, then injecting the fluid into a cavity, and solidifying and forming the fluid plastic through cooling, so as to form various plastic part structures; injection molds are widely used in industry due to their high complexity, high efficiency molding, etc., and are commonly used in medical devices, home electric appliances, and electric appliances.

Currently, in the process of molding an injection molding product, concave features, such as concave holes or grooves, are often formed at the side wall, and during molding, the features are usually needed to be molded by a core pulling mechanism so as to facilitate subsequent demolding. The core pulling mechanism generally comprises a core pulling block and a driving air cylinder, wherein the driving air cylinder drives the core pulling block to be inserted into the cavity so as to participate in the molding of the side wall characteristics of a product, and when the product needs to be demoulded, the driving air cylinder drives the core pulling block to be pulled away from a workpiece, so that the demoulding of a part is facilitated.

Aiming at the related technology, due to the influences of manufacturing precision and assembly precision, when the core pulling mechanism is closed in the mold, the situation that the core pulling mechanism is not closed in place possibly occurs, so that plastic flows out into the cavity, and further the situation that a workpiece generates flash, burrs and the like is caused, and the stability of the core pulling mechanism during closing also has a larger lifting space.

Disclosure of Invention

In order to improve the closing stability of a core pulling mechanism, the utility model provides a core pulling locking structure of a mold.

The utility model provides a core-pulling locking structure of a mold, which adopts the following technical scheme:

the core-pulling locking structure of the mold comprises a movable mold set, a fixed mold set and a core-pulling mechanism, wherein the movable mold set and the fixed mold set can be mutually opened and closed to form a cavity, the core-pulling mechanism is arranged on the movable mold set and movably stretches into the cavity to participate in forming of a workpiece, and the locking mechanism comprises a power assembly and is arranged on the fixed mold set; and the locking assembly is connected with the power assembly and is used for driving the locking assembly to stretch out and draw back, and when the core pulling mechanism is closed in the cavity, the power assembly drives the locking assembly to press the core pulling mechanism.

Through adopting above-mentioned technical scheme, power component drives locking subassembly and carries out the pressfitting fixedly with the mechanism of loosing core, makes the mechanism of loosing core be difficult for not hard up when closing in the die cavity, and the closure is more in place, produces the problem of product defect and obtains optimizing, and the closure stability of mechanism of loosing core can promote.

Preferably, the locking assembly comprises a guide piece fixedly arranged on the fixed die set; the pressing rod is arranged in the guide piece in a sliding manner and is provided with external threads; the driving ring is rotationally installed in the guide piece, a plurality of driving teeth are sequentially arranged on the outer edge along the circumferential direction, an inner thread is arranged on the inner edge, the driving ring is meshed with the outer thread of the pressing rod through the inner thread, the driving ring is connected with the power assembly through the driving teeth, and the power assembly is used for driving the driving ring to rotate so that the end part of the pressing rod is pressed on the core pulling mechanism.

By adopting the technical scheme, under the guiding action of the guide piece, the pressing rod can press and fix the core-pulling mechanism in a reciprocating sliding mode, so that locking is realized; the guide piece plays a good supporting role; meanwhile, under the action of the driving ring and under the cooperation of the external threads and the internal threads, the rotary power is converted into the reciprocating motion of the pressing rod, the structure is ingenious, and meanwhile, the self-locking can be realized through the external threads and the internal threads, so that the structure stability is good.

Preferably, the power assembly comprises a motor and a first gear, the motor is fixedly arranged on the fixed die set, the first gear is connected with an output shaft of the motor, and the first gear is connected with the driving ring.

By adopting the technical scheme, the motor can output stable torque, so that the first gear is driven to rotate, and finally, power is transmitted to the locking mechanism, so that the power output is realized.

Preferably, the power assembly further comprises a second gear, the second gear is rotatably arranged in the fixed die set, the second gear is respectively meshed with the first gear and the driving ring, and the outer diameter of the second gear is larger than that of the first gear.

By adopting the technical scheme, the second gear can play a role in buffering, so that the torque output is more stable; meanwhile, the engagement between the first gear and the second gear can further increase torque, and structural stability is remarkably improved.

Preferably, the end part of the pressing rod is fixedly connected with a limiting block.

Through adopting above-mentioned technical scheme, the setting of stopper can make the difficult pine of pressfitting pole take off the guide, and structural stability can promote.

Preferably, the guide piece is provided with a sliding hole in a penetrating manner, the pressing rod is arranged in the sliding hole in a sliding manner, a guide groove is concavely formed in the hole wall of the sliding hole, and the guide piece is provided with a protruding block which is arranged in the guide groove in a sliding manner.

Through adopting above-mentioned technical scheme, the setting of slide opening can make the pressfitting pole flexible for the guide activity, and simultaneously, sliding fit between lug and the guide slot can restrict the pressfitting pole and rotate, is difficult for driving the pressfitting pole rotation at actuating ring pivoted in-process, and the pressfitting action is smooth stable more, has satisfied the flexible in-process motion degree of freedom's of pressfitting pole demand.

Preferably, the core pulling mechanism comprises a core pulling cylinder which is fixedly arranged on the movable module; and the core pulling block is arranged at the movable module in a sliding manner and is connected with the telescopic rod of the core pulling cylinder.

Through adopting above-mentioned technical scheme, the cylinder of loosing core provides reciprocating drive power for the piece of loosing core, and the piece of loosing core can participate in the shaping of work piece, and the structure is succinct practical.

Preferably, the loose core block is provided with a stress plane matched with the locking mechanism.

By adopting the technical scheme, the stress plane provides a stable stress area, so that the core pulling block can be subjected to stable locking force, and the structural stability is improved.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. when the core-pulling mechanism closes the cavity, the power assembly drives the locking assembly to press and fix the core-pulling mechanism, so that the core-pulling mechanism is not easy to loosen when being closed in the cavity, the closing is more in place, and the closing stability of the core-pulling mechanism is improved;

2. the motor can stably output torque, the torque is increased under the action of the first gear and the second gear, so that the locking action is facilitated to be smoothly carried out, and the stability of the locking assembly is better when moving;

3. the stress plane ensures that the core pulling block is more uniformly stressed when locked, is not easy to unbalanced load, and has stable structure closure.

Drawings

FIG. 1 is a schematic view of a core-pulling locking structure according to a preferred embodiment of the present utility model.

FIG. 2 is a schematic view of a movable module and a core pulling mechanism according to a preferred embodiment of the present utility model.

FIG. 3 is a schematic view of a locking mechanism according to a preferred embodiment of the present utility model.

Fig. 4 is a schematic structural view of the pressing bar and the driving ring according to a preferred embodiment of the present utility model.

Reference numerals illustrate: 1. a movable module; 11. a chute; 2. a fixed module; 3. a core pulling mechanism; 31. a core pulling cylinder; 32. a core pulling block; 321. a force-bearing plane; 4. a locking mechanism; 41. a power assembly; 411. a motor; 412. a first gear; 413. a second gear; 42. a locking assembly; 421. a guide member; 422. a pressing rod; 4221. a bump; 423. a drive ring; 4231. a drive tooth; 5. a slide hole; 6. a guide groove; 7. and a limiting block.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-4.

The embodiment of the utility model discloses a core-pulling locking structure of a mold.

Referring to fig. 1, the structure includes a movable module 1, a fixed module 2, and a core pulling mechanism 3.

The movable mould set 1 is generally provided with a convex part, the fixed mould set 2 is provided with a concave part, under the action of an injection machine, the movable mould and the fixed mould set 2 can be mutually opened and closed, and when the movable mould and the fixed mould set are mutually closed, a cavity is formed; meanwhile, the fixed die set 2 is provided with a runner communicated with the die cavity, the runner can be used for injecting fluid plastic into the die cavity, and corresponding plastic products such as household appliance shells or medical equipment are formed after cooling; at this time, the side of the plastic part usually has concave or hole features, and the above features are mainly formed by the core pulling mechanism 3.

Referring to fig. 2, specifically, the core back mechanism 3 includes a core back mechanism 3 including a core back cylinder 31 and a core back block 32. Firstly, a core pulling cylinder 31 is fixedly arranged on the outer side of a movable module 1, a sliding groove 11 is formed in the movable module 1, and the sliding groove 11 is communicated with a cavity; in addition, the core-pulling block 32 is slidably installed in the chute 11 and fixedly connected with the telescopic rod of the core-pulling cylinder 31, and at this time, the core-pulling block 32 can be close to or far away from the cavity, so that the core-pulling mechanism 3 can be movably extended into the cavity to participate in the forming of the workpiece.

At this time, there may be a situation that the core-pulling block 32 is not closed in place, in order to improve the sealing closure of the core-pulling block 32, and in conjunction with fig. 3, the mechanism further includes a locking mechanism 4, where the locking mechanism 4 is used to additionally apply a locking force in a state where the core-pulling block 32 is closed, so as to improve the structural stability when the core-pulling block 32 is closed. In order to facilitate the locking mechanism 4 to apply pressure to the core-pulling block 32, a stress plane 321 is disposed at a position of the core-pulling block 32 near the outer side of the movable module 1, and the telescopic rod of the core-pulling cylinder 31 is perpendicular to the stress plane 321, so that the direction of the pushing force output by the core-pulling cylinder 31 is perpendicular to the stress plane 321, and at this time, the core-pulling block 32 can obtain stable locking force.

Specifically, with continued reference to fig. 3, to further close the core-pulling block 32, the locking mechanism 4 includes a power assembly 41 and a locking assembly 42. The power assembly 41 is disposed on the fixed module 2, the locking assembly 42 is connected with the power assembly 41, the power assembly 41 is used for outputting power to the locking assembly 42, so that the locking assembly 42 performs a telescopic locking action, and when the core-pulling mechanism 3 is closed in the cavity, the power assembly 41 drives the locking assembly 42 to press the core-pulling mechanism 3.

In order to realize the output of power, the power assembly 41 includes a motor 411, a first gear 412 and a second gear 413, the motor 411 is fixedly mounted on the outer side of the fixed mold set 2, the first gear 412 is fixedly connected with an output shaft of the motor 411, and the motor 411 can drive the first gear 412 to rotate at this time. Meanwhile, the second gear 413 is rotatably installed on the fixed mold set 2, the first gear 412 is meshed with the second gear 413, at this time, the first gear 412 can drive the second gear 413 to rotate, and the second gear 413 is connected with the locking mechanism 4, so that power transmission is achieved.

Further, in the present embodiment, the outer diameter of the second gear 413 is larger than the outer diameter of the first gear 412, at this time, the second gear 413 not only can play a role in buffering but also can play a role in decelerating between the locking mechanism 4 and the first gear 412, the torque output by the second gear 413 is increased, the power transmission is more stable, and the locking action of the locking mechanism 4 is facilitated to be smoothly performed.

Referring to fig. 3 and 4, the locking assembly 42 includes a guide 421, a pressing bar 422, and a driving ring 423. Wherein, the guiding piece 421 is cuboid, and the guiding piece 421 is fixedly installed on the fixed die set 2; the guide piece 421 is provided with a sliding hole 5 penetrating through two ends, meanwhile, a guide groove 6 is concavely arranged at the hole wall of the sliding hole 5, the guide groove 6 extends along the length direction of the sliding hole 5 and is respectively opened at two ends of the guide piece 421, and the sliding hole 5 and the guide groove 6 are used for sliding assembly of the pressing rod 422.

Specifically, the pressing rod 422 is in a round rod structure in the present embodiment, the pressing rod 422 is provided with external threads, the external threads occupy about half of the length of the pressing rod 422, and the rest is in a smooth structure. In addition, the smooth portion of the pressing rod 422 is integrally connected with a bump 4221, the outer edge profile of the bump 4221 is adapted to the notch profile of the guide slot 6, the bump 4221 is slidably disposed in the guide slot 6, and the outer wall of the pressing rod 422 is slidably engaged with the wall of the sliding hole 5, at this time, the pressing rod 422 can reciprocate and stretch in comparison with the guide member 421, and meanwhile, in the stretching process, the pressing rod 422 is not easy to rotate, so as to ensure stability of the stretching motion.

In addition, the driving ring 423 is in a ring structure in the present embodiment, the driving ring 423 is rotatably mounted at one end of the guide 421 through a bearing, and the outer edge of the driving ring 423 is integrally connected with a plurality of driving teeth 4231 sequentially along the circumferential direction; meanwhile, the inner edge of the driving ring 423 has an internal thread. The driving ring 423 is engaged with the external thread of the pressing rod 422 by the internal thread on the one hand, and is engaged with the second gear 413 by the driving teeth 4231 on the other hand, at this time, the first gear 412 is connected with the driving ring 423 by the second gear 413; if the power assembly 41 is started, the power assembly 41 can drive the driving ring 423 to rotate, and then drive the pressing rod 422 to reciprocate by changing the output direction of the torque of the motor 411 until the end of the pressing rod 422 is pressed onto the stress plane 321 of the core-pulling block 32, so as to lock the core-pulling block 32.

Further, the end part of the pressing rod 422 away from the core pulling block 32 is fixedly connected with a limiting block 7, and the setting of the limiting block 7 can enable the pressing rod 422 not to be easily loosened from the guide piece 421, so that the structural stability is improved.

The embodiment of the utility model relates to a mould core-pulling locking structure, which comprises the following implementation principles: the driving motor 411, the motor 411 drives the first gear 412 to rotate, at this time, the driving ring 423 is driven to rotate by the second gear 413, and the driving ring 423 drives the pressing rod 422 under the pushing of the screw thread until the end part of the pressing rod 422 is pressed to the stress plane 321; the locking assembly 42 is used for realizing press fit fixation of the core-pulling mechanism 3, the core-pulling mechanism 3 is not easy to loosen when being closed in the cavity, and the closing stability of the core-pulling mechanism 3 is improved.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims

1. The utility model provides a mould locking structure of loosing core, includes movable mould group (1), cover half group (2) and mechanism of loosing core (3), movable mould group (1) with cover half group (2) can mutually open and shut in order to form the die cavity, mechanism of loosing core (3) are located on movable mould group (1) to in the activity stretches into the die cavity, participate in the shaping of work piece, its characterized in that: also comprises a locking mechanism (4), wherein the locking mechanism (4) comprises

The power assembly (41) is arranged on the fixed die set (2);

and the locking assembly (42) is connected with the power assembly (41), the power assembly (41) is used for driving the locking assembly (42) to stretch, and when the core pulling mechanism (3) is closed in the cavity, the power assembly (41) drives the locking assembly (42) to press the core pulling mechanism (3).

2. The mold core-pulling locking structure according to claim 1, wherein: the locking assembly (42) includes

A guide member (421) fixedly arranged on the fixed die set (2);

a pressing rod (422) which is arranged in the guide piece (421) in a sliding way and is provided with external threads;

the driving ring (423) is rotatably mounted on the guide piece (421), a plurality of driving teeth (4231) are sequentially arranged on the outer edge along the circumferential direction, the inner edge is provided with an inner thread, the driving ring (423) is meshed with the outer thread of the pressing rod (422) through the inner thread, the driving ring is connected with the power assembly (41) through the driving teeth (4231), and the power assembly (41) is used for driving the driving ring (423) to rotate so that the end part of the pressing rod (422) is pressed with the core pulling mechanism (3).

3. The mold core-pulling locking structure according to claim 2, wherein: the power assembly (41) comprises a motor (411) and a first gear (412), the motor (411) is fixedly arranged in the fixed die set (2), the first gear (412) is connected with an output shaft of the motor (411), and the first gear (412) is connected with the driving ring (423).

4. A mold core-pulling locking structure according to claim 3, wherein: the power assembly (41) further comprises a second gear (413), the second gear (413) is rotatably arranged on the fixed die set (2), the second gear (413) is respectively meshed with the first gear (412) and the driving ring (423), and the outer diameter of the second gear (413) is larger than that of the first gear (412).

5. The mold core-pulling locking structure according to claim 2, wherein: the end part of the pressing rod (422) is fixedly connected with a limiting block (7).

6. The mold core-pulling locking structure according to claim 2, wherein: the guide piece (421) is provided with a sliding hole (5) in a penetrating mode, the pressing rod (422) is arranged in the sliding hole (5) in a sliding mode, a guide groove (6) is concavely formed in the hole wall of the sliding hole (5), and the guide piece (421) is provided with a protruding block (4221) which is arranged in the guide groove (6) in a sliding mode.

7. The mold core-pulling locking structure according to claim 1, wherein: the core pulling mechanism (3) comprises

The core pulling cylinder (31) is fixedly arranged on the movable module (1);

and the core pulling block (32) is arranged at the movable module (1) in a sliding manner and is connected with the telescopic rod of the core pulling cylinder (31).

8. The mold core-pulling locking structure according to claim 7, wherein: the loose core block (32) is provided with a stress plane (321) matched with the locking mechanism (4).