CN111002539A

CN111002539A - Edge-flying-preventing core-pulling mechanism applied to injection mold

Info

Publication number: CN111002539A
Application number: CN201911349620.5A
Authority: CN
Inventors: 李爱莲
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-04-14

Abstract

The invention discloses a flash-preventing core-pulling mechanism applied to an injection mold, relates to the technical field of injection molds, and solves the problems that the existing core-pulling structure is complex, occupies a large space, and sometimes influences the demolding and the taking-out action of a workpiece; the top of the lower die is connected with a group of upper dies in a sliding manner; a plurality of groups of core pulling assemblies are connected inside the lower die in a sliding manner; the inner part of the lower die is axially connected with a group of intermediate transmission shafts. The device is through adopting rack and pinion drive mechanism, through the slip that the action of last mould compound die drove the core-pulling piece in step, accomplishes the action of loosing core, need not extra power component and provides power, and the device is small simultaneously, and the space occupies the less, does not influence normal drawing of patterns action, and the device sets up sealed inclined plane at core-pulling piece and die cavity handing-over department, the effectual production that prevents the overlap.

Description

Edge-flying-preventing core-pulling mechanism applied to injection mold

Technical Field

The invention relates to the technical field of injection molds, in particular to a trimming and core pulling preventing mechanism applied to an injection mold.

Background

In an injection mold, a core is usually pulled to process the position on a mold parting surface of a product, which cannot be demolded, some existing core pulling structures are driven by a cylinder or a hydraulic cylinder, and some existing core pulling structures are matched with a fixed mold through an inclined guide pillar to move a sliding block along with mold opening or mold closing.

For example, application No.: the invention provides a core-pulling mechanism, which comprises a fixed die component and a movable die component matched with the fixed die for injection molding, wherein the fixed die component is provided with a cavity, the movable die component is movably arranged at one side of the fixed die component, and the core-pulling mechanism further comprises: and the workpiece ejection assembly is used for ejecting the injection-molded workpiece out of the cavity, and is arranged on the fixed die assembly. The core pulling mechanism provided by the invention solves the problems of burr generation, unsmooth die opening and guide pillar damage in the core pulling process of the fixed die in the core pulling mechanism in the prior art. .

Based on the above, the existing core pulling structure is complex, occupies a large space, sometimes influences the demolding and the workpiece taking-out action, and meanwhile, due to the existing core pulling structure, a certain gap exists between the core pulling block and the mold cavity, and the flash phenomenon easily occurs in the injection molding process, so that the existing requirements are not met, and the flash-preventing core pulling mechanism applied to the injection mold is provided.

Disclosure of Invention

The invention aims to provide a flash-preventing core-pulling mechanism applied to an injection mold, and aims to solve the problems that the existing core-pulling structure proposed in the background art is complex, occupies a large space, sometimes influences the demolding and the workpiece taking action, and simultaneously has a certain gap between a core-pulling block and a mold cavity and is easy to generate a flash phenomenon in the injection molding process.

In order to achieve the purpose, the invention provides the following technical scheme: a trimming-preventing core-pulling mechanism applied to an injection mold comprises a lower mold; the top of the lower die is connected with a group of upper dies in a sliding manner; a plurality of groups of core pulling assemblies are connected inside the lower die in a sliding manner; a plurality of groups of driving blocks are connected inside the lower die in a sliding manner; the inner part of the lower die is axially connected with a group of intermediate transmission shafts.

Preferably, the upper die further comprises a plurality of groups of driving columns, and the positions of the driving columns correspond to the positions of the driving blocks one by one from top to bottom.

Preferably, the active block further comprises a slide rail and a spring, the outside of the active block is provided with a set of slide rail, the active block passes through the slide rail and the lower die is in sliding connection, the bottom of the active block is provided with a set of spring, and the active block passes through the spring and the lower die is in elastic connection.

Preferably, the middle transmission shaft further comprises the small gear and the large gear, and the middle transmission shaft is coaxially and fixedly connected with the small gear and the large gear.

Preferably, the driving block further comprises the driving rack, a group of driving racks is arranged on the inner side of the driving block, and the driving racks and the pinion are meshed to form a gear rack transmission mechanism together.

Preferably, the core pulling assembly further comprises a driven rack, a group of the driven rack is arranged above the outer side of the core pulling assembly, and the driven rack and the large gear are meshed to form a gear rack transmission mechanism together.

Preferably, the core-pulling assembly further comprises the core-pulling block and the sealing inclined plane, a group of core-pulling blocks is arranged on the inner side of the core-pulling assembly, and the sealing inclined plane is arranged at the sealing position of the core-pulling block and the lower die.

Preferably, the core-pulling assembly, the driving block, the intermediate transmission shaft and the driving column are not fixed in positions in different molds and can be adjusted according to actual needs.

Compared with the prior art, the invention has the beneficial effects that:

the device is through adopting rack and pinion drive mechanism, through the slip that the action of last mould compound die drove the core-pulling piece in step, accomplishes the action of loosing core, need not extra power component and provides power, and the device is small simultaneously, and the space occupies the less, does not influence normal drawing of patterns action, and the device sets up sealed inclined plane at core-pulling piece and die cavity handing-over department, the effectual production that prevents the overlap.

Drawings

FIG. 1 is a schematic side view of the present invention;

FIG. 2 is a schematic side view of the upper mold shaft of the present invention;

FIG. 3 is a schematic side view of the lower mold shaft of the present invention;

FIG. 4 is a schematic side view of the inner shaft of the lower mold of the present invention;

FIG. 5 is a schematic structural view of a transmission shaft side of the core pulling assembly of the present invention;

FIG. 6 is a schematic axial side view of the active mass of the present invention;

FIG. 7 is a schematic axial side view of the core pulling assembly of the present invention;

FIG. 8 is a schematic structural view of the transmission shaft side of the core pulling assembly in an extended state according to the present invention;

in the figure: 1. a lower die; 2. an upper die; 201. a drive column; 3. a core pulling assembly; 301. a driven rack; 302. core extraction; 303. sealing the inclined plane; 4. an active block; 401. a driving rack; 402. a slide rail; 403. a spring; 5. an intermediate transmission shaft; 501. a pinion gear; 502. and a gearwheel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 8, an embodiment of the present invention includes: a mechanism for preventing edge-flying and core-pulling applied to an injection mold comprises a lower mold 1; the top of the lower die 1 is connected with a group of upper dies 2 in a sliding way; the upper die 2 further comprises a driving column 201, a plurality of groups of driving columns 201 are arranged on the lower end face of the upper die 2, the positions of the driving columns 201 correspond to the positions of the driving blocks 4 one by one from top to bottom, and in use, when the upper die 2 slides downwards to the bottom, the driving columns 201 push the driving blocks 4 downwards; the driving block 4 further comprises a sliding rail 402 and a spring 403, a group of sliding rails 402 is arranged on the outer side of the driving block 4, the driving block 4 is connected with the lower die 1 in a sliding mode through the sliding rails 402, a group of springs 403 is arranged at the bottom of the driving block 4, the driving block 4 is elastically connected with the lower die 1 through the springs 403, and the driving block 4 is guided by the sliding rails 402 in use; a plurality of groups of core-pulling assemblies 3 are connected in the lower die 1 in a sliding manner; the core-pulling assembly 3 further comprises a driven rack 301, a group of driven racks 301 are arranged above the outer side of the core-pulling assembly 3, the driven racks 301 and the large gear 502 are meshed to form a gear-rack transmission mechanism together, and the middle transmission shaft 5 rotates to drive the core-pulling assembly 3 to slide towards the inner side through the gear-rack transmission mechanism in use; a plurality of groups of active blocks 4 are connected in the lower die 1 in a sliding manner; the driving block 4 further comprises a driving rack 401, a group of driving racks 401 is arranged on the inner side of the driving block 4, the driving racks 401 and the pinion 501 are meshed to form a gear-rack transmission mechanism together, and when the driving block 4 slides downwards in use, the driving block 4 drives the intermediate transmission shaft 5 to rotate through the gear-rack transmission mechanism; a group of intermediate transmission shafts 5 are axially connected inside the lower die 1; the middle transmission shaft 5 also comprises a small gear 501 and a large gear 502, and the middle transmission shaft 5 is coaxially and fixedly connected with the large gear 502 through the small gear 501; .

Further, the core-pulling assembly 3 further comprises a core-pulling block 302 and a sealing inclined plane 303, the inner side of the core-pulling assembly 3 is provided with a group of core-pulling blocks 302, the sealing inclined plane 303 is arranged at the sealing position of the core-pulling blocks 302 and the lower die 1, and in use, a gap between the lower die 1 and the core-pulling assembly 3 is sealed through the matching of the sealing inclined plane 303 and the lower die 1, so that the generation of flash is prevented.

Further, the positions of the core pulling assembly 3, the driving block 4, the intermediate transmission shaft 5 and the driving column 201 in different molds are not fixed, and can be adjusted according to actual needs.

The working principle is as follows: when the upper die 2 slides downwards to the bottom during die assembly, the driving column 201 is in contact with the driving block 4, the driving block 4 is pushed downwards and compresses the spring 403, the driving block 4 drives the intermediate transmission shaft 5 to rotate through a gear and rack transmission mechanism formed by meshing the driving rack 401 and the pinion 501, the intermediate transmission shaft 5 drives the core-pulling assembly 3 to slide inwards through a gear and rack transmission mechanism formed by meshing the driven rack 301 and the bull gear 502, and core-pulling action is completed.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a be applied to injection mold's prevent that overlap mechanism of loosing core which characterized in that: comprises a lower die (1); the top of the lower die (1) is connected with a group of upper dies (2) in a sliding manner; a plurality of groups of core-pulling assemblies (3) are connected in the lower die (1) in a sliding manner; a plurality of groups of active blocks (4) are connected in the lower die (1) in a sliding manner; the inner part of the lower die (1) is axially connected with a group of intermediate transmission shafts (5). .

2. The mechanism of claim 1, wherein the mechanism comprises: go up mould (2) still including drive post (201), the lower terminal surface of going up mould (2) is provided with the multiunit drive post (201), the position of drive post (201) with the one-to-one in the position of initiative piece (4) from top to bottom.

3. The mechanism of claim 1, wherein the mechanism comprises: the active block (4) is further provided with a sliding rail (402), a spring (403), a set of sliding rail (402) is arranged on the outer side of the active block (4), the active block (4) is connected with the lower die (1) in a sliding mode through the sliding rail (402), a set of spring (403) is arranged at the bottom of the active block (4), and the active block (4) is connected with the lower die (1) in an elastic mode through the spring (403).

4. The mechanism of claim 1, wherein the mechanism comprises: the middle transmission shaft (5) further comprises a small gear (501) and a large gear (502), and the small gear (501) and the large gear (502) are coaxially and fixedly connected with each other on the middle transmission shaft (5).

5. The mechanism of claim 1, wherein the mechanism comprises: the driving block (4) further comprises a driving rack (401), a group of driving racks (401) is arranged on the inner side of the driving block (4), and the driving racks (401) and the pinion (501) are meshed to form a gear-rack transmission mechanism together.

6. The mechanism of claim 1, wherein the mechanism comprises: the core pulling assembly (3) is characterized in that the core pulling assembly (3) further comprises a driven rack (301), a group of driven racks (301) is arranged above the outer side of the core pulling assembly (3), and the driven racks (301) and the gear wheels (502) are meshed to form a gear rack transmission mechanism together.

7. The mechanism of claim 1, wherein the mechanism comprises: the core-pulling assembly (3) further comprises a core-pulling block (302) and a sealing inclined plane (303), a group of core-pulling blocks (302) are arranged on the inner side of the core-pulling assembly (3), and the sealing inclined plane (303) is arranged at the sealing position of the core-pulling blocks (302) and the lower die (1).

8. The mechanism of claim 1, wherein the mechanism comprises: the core-pulling assembly (3), the driving block (4), the middle transmission shaft (5) and the driving column (201) are not fixed in positions in different molds and can be adjusted according to actual needs.