CN213035216U

CN213035216U - Core pulling structure of injection mold

Info

Publication number: CN213035216U
Application number: CN202021780128.1U
Authority: CN
Inventors: 邱士建
Original assignee: Guangdong Xinruntao Technology Co ltd
Current assignee: Guangdong Xinruntao Technology Co ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-04-23
Anticipated expiration: 2030-08-24

Abstract

The utility model discloses a core-pulling structure of an injection mold, which relates to the technical field of molds and comprises a fixed mold plate, a transmission block, an inclined guide post, a movable mold plate and a baffle plate, wherein one side of the fixed mold plate is fixedly connected with a second cylinder, the inclined guide post is fixedly connected with the middle part of the transmission block, the upper part of the other side of the fixed mold plate is fixedly connected with a first cylinder, the lower part of the other side of the transmission block is fixedly connected with a push plate, the movable mold plate is movably connected with the outer side of the push plate, one side of the baffle plate close to the movable mold plate is detachably connected with a spring groove, the core-pulling structure of the injection mold designs the inclined guide post into a movable part and places the movable part above, reduces the impact force brought during reset, does not need to be aligned after the inclined guide post is lengthened, reduces the impact and also improves the reset speed, directly arranges the reset, the air cylinder is used for driving the die opening and the resetting, so that the operation is simplified and the running precision is improved.

Description

Core pulling structure of injection mold

Technical Field

The utility model relates to the technical field of mold, specifically be an injection mold's structure of loosing core.

Background

After the injection of the plastic injection-molded part is completed, the injection-molded part needs to be separated from the mold from a certain direction. However, some injection-molded parts have side holes or inclined holes, which cannot be directly removed from the mold from any direction, so that a part of the mold structure of the hole part kit needs to be removed first, that is, core pulling is performed. The core pulling needs direction constant transmission to be stable so as to protect an injection molding part, common core pulling structures comprise an inclined guide pillar, a sliding block, a gear rack and the like, and the most common design structure is the inclined guide pillar structure.

In chinese utility model patent application no: CN201420445987.3 discloses a side injection mold of loosing core, this side injection mold of loosing core, including fixed die plate, movable mould board and being located the fixed die plate with the side core between the movable mould board, be equipped with oblique guide pillar and latch segment on the fixed die plate, the top of oblique guide pillar runs through the side core is up to the movable mould board the inside, the inclined plane of latch segment with the inclined plane contact of side core, wherein, the movable mould board side is equipped with the baffle, the baffle with the side core is equipped with the screw, cup jointed the spring on the screw. This side injection mold of loosing core, at the in-process that resets after loosing core, it still has the movable mould board and collides with oblique guide pillar easily when reseing, uses the problem that influences oblique guide pillar precision for a long time.

Therefore, it is necessary to provide a core pulling structure of an injection mold to solve the above problems.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

An object of the utility model is to provide an injection mold's structure of loosing core to current side injection mold of loosing core that proposes in solving above-mentioned background art, at the in-process that resets after loosing core, it still has movable mould board and hits with oblique guide pillar when resetting easily, uses the problem that influences oblique guide pillar precision for a long time.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a core-pulling structure of an injection mold comprises a fixed mold plate, a transmission block, an inclined guide post, a movable mold plate and a baffle plate, wherein one side of the fixed mold plate is fixedly connected with a second air cylinder, the center of the air cylinder is movably connected with a second top plate, one side of the transmission block is fixedly connected to the upper portion of the second top plate, the inclined guide post is fixedly connected to the middle portion of the transmission block, an inclined through hole is formed in the middle portion of the fixed mold plate, the inclined guide post is sleeved inside the inclined through hole, a first constraint surface is arranged at the joint of the fixed mold plate and the transmission block, a second constraint surface is arranged at the joint of the transmission block and the fixed mold plate, a first air cylinder is fixedly connected to the upper portion of the other side of the fixed mold plate, the center of the first air cylinder is movably connected with the first top plate, a push plate is fixedly connected to the lower portion of the other side of the transmission block, the side core has been seted up at the middle part of semicircle groove, one side that the baffle is close to the movable mould board can be dismantled and be connected with the spring groove, the one end of the deepest fixedly connected with spring in spring groove, the other end fixed connection of spring is on the movable mould board, the fixed mould board is combined with the injection molding with the centre of movable mould board, the top and the side of injection molding are equipped with first straight hole and the straight hole of second respectively.

Preferably, the inclined angle of the inclined guide pillar is 20 degrees, the first constraint surface and the second constraint surface are mutually attached, the inclined angles of the first constraint surface, the second cylinder and the second top plate are all 20 degrees, and the length of the inclined guide pillar is greater than the limit working length of the second top plate.

Preferably, the injection molding part is T-shaped, and the two short arms where the first straight hole and the second straight hole are located are perpendicular to each other.

Preferably, the push plates are respectively arranged on the front side and the rear side of the transmission block, the push plates are vertically arranged, and the first cylinder is located between the two push plates.

Preferably, the injection molding piece is combined in a cavity on the outer surface of the fixed mold plate and the movable mold plate and a mold core in the first top plate and the semicircular groove, and the specific shapes of the cavity and the mold core refer to the appearance of the injection molding piece.

Preferably, the spring is horizontally placed, the spring is in an initial stretching state, and is in a compression state after core pulling is finished.

Preferably, the first top board may be extended or contracted in an initial state.

(III) advantageous effects

Compared with the prior art, the utility model provides an injection mold's structure of loosing core possesses following beneficial effect:

1. this injection mold's structure of loosing core designs oblique guide pillar as the moving part and places in the top, has reduced the impact force that brings when reseing, need not to adjust well after oblique guide pillar extension simultaneously, has also improved the speed of reseing when having reduced the striking, has indirectly improved the productivity of mould.

2. According to the core-pulling structure of the injection mold, the reset spring is directly arranged in the spring groove behind the movable mold plate, and the mold opening and resetting efficiency is improved to some extent.

3. This injection mold's structure of loosing core utilizes cylinder drive die sinking and resets, is intelligent, automatic design, has improved the precision of operation when simplifying the operation.

Drawings

Fig. 1 is a general schematic diagram of the present invention;

FIG. 2 is a schematic view of an injection molded part;

fig. 3 is a top view of the present invention;

FIG. 4 is a cross-sectional view taken through the section line of FIG. 3;

FIG. 5 is a variation of FIG. 4 after a change in the core back;

fig. 6 is a partially enlarged view of the area a in fig. 5.

In the figure: 1. fixing a template; 2. a transmission block; 3. moving the template; 4. an injection molded part; 5. a second cylinder; 6. a first cylinder; 7. an inclined guide post; 8. a first top plate; 9. a baffle plate; 10. a spring slot; 11. a spring; 12. a first straight hole; 13. a second straight hole; 14. a semicircular groove; 15. an oblique through hole; 16. a second top plate; 17. pushing the plate; 18. a side core; 19. a second constraining surface; 20. a first constraining surface.

Detailed Description

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

Referring to fig. 1-6, a core pulling structure of an injection mold comprises a fixed mold plate 1, a transmission block 2, an inclined guide post 7, a movable mold plate 3 and a baffle plate 9, wherein an inclination angle of the inclined guide post 7 is 20 degrees, one side of the fixed mold plate 1 is fixedly connected with a second cylinder 5, the center of the cylinder is movably connected with a second top plate 16, the length of the inclined guide post 7 is greater than the limit working length of the second top plate 16, one side of the transmission block 2 is fixedly connected to the upper part of the second top plate 16, the inclined guide post 7 is fixedly connected to the middle part of the transmission block 2, an inclined through hole 15 is formed in the middle part of the fixed mold plate 1, the inclined guide post 7 is sleeved inside the inclined through hole 15, the inclined guide post 7 is used for limiting the movement angle of the transmission block 2, the inclined guide post 7 is designed to be placed above the transmission block, the impact force caused by resetting is reduced, meanwhile, the inclined guide, indirectly improves the productivity of the die, a first constraint surface 20 is arranged at the joint of the fixed die plate 1 and the transmission block 2, a second constraint surface 19 is arranged at the joint of the transmission block 2 and the fixed die plate 1, the first constraint surface 20 and the second constraint surface 19 are mutually jointed and cooperate with the inclined guide post 7 to limit the motion direction, the inclination angles of the first constraint surface 20, the second constraint surface 19, the second cylinder 5 and the second top plate 16 are all 20 degrees, the upper part of the other side of the fixed die plate 1 is fixedly connected with a first cylinder 6, the die opening and resetting are driven by the cylinder, the die opening and resetting are designed intelligently and automatically, the operation precision is improved while the operation is simplified, the center of the first cylinder 6 is movably connected with a first top plate 8, the first top plate 8 can extend or contract under the initial state, the lower part of the other side of the transmission block 2 is fixedly connected with a push plate 17, the push plate 17 is respectively arranged at the front side, the push plate 17 is vertically placed, the push plate 17 pushes the movable mould plate 3 to open the mould, the first air cylinder 6 is positioned between the two push plates 17, the movable mould plate 3 is movably connected at the outer side of the push plate 17, one side of the movable mould plate 3 close to the fixed mould plate 1 is provided with a semicircular groove 14, the upper part of the semicircular groove 14 is a movement area of the first top plate 8, the lower part is a part of a mould cavity, the middle part of the semicircular groove 14 is provided with a side mould core 18, one side of the baffle plate 9 close to the movable mould plate 3 is detachably connected with a spring groove 10, one end of a spring 11 is fixedly connected with the deepest part of the spring groove 10, the other end of the spring 11 is fixedly connected on the movable mould plate 3, the spring 11 is horizontally placed, the spring 11 is in an initial stretching state and becomes a compressing state after the core-pulling is finished, the mould is stretched during mould opening and is, the middle of fixed die plate 1 and movable die plate 3 is combined with injection molding 4, the top and the side of injection molding 4 are equipped with first straight hole 12 and second straight hole 13 respectively, injection molding 4 is the T font, two short arms at first straight hole 12 and second straight hole 13 place are mutually perpendicular, injection molding 4 combines in the die cavity of fixed die plate 1 and movable die plate 3 surface, and in the core in first roof 8 and the semicircular groove 14, the die cavity refers to injection molding 4 appearance with the concrete shape of core, multiple injection molding 4 that have structures such as side direction hole, axle, ring, cover all can be applicable this device of loosing core.

The cylinder elements presented in this document are all electrically connected to an external master controller and 220V mains, and the master controller may be a conventional known device controlled by a computer or the like.

The working principle is as follows: when the mold is opened, firstly, the first air cylinder 6 drives the first top plate 8 to contract, so that the mold core is separated from the first straight hole 12, then the second air cylinder 5 drives the second top plate 16 to extend, the second top plate 16 drives the transmission block 2 to move obliquely upwards, the movement angle of the transmission block 2 is strictly limited by the oblique guide pillar 7, the transmission block 2 is fixedly connected with the push plate 17, the push plate 17 is vertically placed, the obliquely upward movement of the push plate 17 can be converted into a horizontal force for the movable mold plate 3, the movable mold plate 3 drives the side mold core 18 and a part of the mold cavity to be opened, the spring 11 is changed from stretching into compression along with the movement, finally, the first air cylinder 6 reversely operates to drive the first top plate 8 to extend, and the first top plate 8 pushes the; when resetting, the cylinder withdraws the initial position, the transmission block 2 resets along with the first cylinder 6, the second top plate 16 resets naturally, and the movable template 3 resets with the help of the spring 11.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an injection mold's structure of loosing core, includes fixed die plate (1), transmission piece (2), guide pillar (7), movable mould board (3) and baffle (9) to one side, its characterized in that: a second cylinder (5) is fixedly connected to one side of the fixed die plate (1), a second top plate (16) is movably connected to the center of the cylinder, one side of the transmission block (2) is fixedly connected to the upper portion of the second top plate (16), the inclined guide post (7) is fixedly connected to the middle portion of the transmission block (2), an inclined through hole (15) is formed in the middle portion of the fixed die plate (1), the inclined guide post (7) is sleeved inside the inclined through hole (15), a first constraint surface (20) is arranged at the joint of the fixed die plate (1) and the transmission block (2), a second constraint surface (19) is arranged at the joint of the transmission block (2) and the fixed die plate (1), a first cylinder (6) is fixedly connected to the upper portion of the other side of the fixed die plate (1), a first top plate (8) is movably connected to the center of the first cylinder (6), and a push plate (17) is fixedly connected to the lower portion of the other side, moving die plate (3) swing joint is in the outside of push pedal (17), semicircular groove (14) have been seted up to one side that moving die plate (3) are close to fixed die plate (1), side core (18) have been seted up at the middle part of semicircular groove (14), one side that baffle (9) are close to moving die plate (3) can be dismantled and is connected with spring groove (10), the deepest fixedly connected with spring (11)'s of spring groove (10) one end, the other end fixed connection of spring (11) is on moving die plate (3), fixed die plate (1) and the centre of moving die plate (3) combine to have injection molding (4), the top and the side of injection molding (4) are equipped with first straight hole (12) and second straight hole (13) respectively.

2. The core pulling structure of an injection mold according to claim 1, characterized in that: the inclination angle of the inclined guide post (7) is 20 degrees, the first constraint surface (20) and the second constraint surface (19) are mutually attached, the inclination angles of the first constraint surface (20), the second constraint surface (19), the second air cylinder (5) and the second top plate (16) are 20 degrees, and the length of the inclined guide post (7) is greater than the limit working length of the second top plate (16).

3. The core pulling structure of an injection mold according to claim 1, characterized in that: the injection molding piece (4) is T-shaped, and two short arms where the first straight hole (12) and the second straight hole (13) are located are perpendicular to each other.

4. The core pulling structure of an injection mold according to claim 1, characterized in that: the front side and the rear side of the transmission block (2) of the push plate (17) are respectively provided with one, the push plate (17) is vertically placed, and the first air cylinder (6) is located between the two push plates (17).

5. The core pulling structure of an injection mold according to claim 1, characterized in that: the injection molding piece (4) is combined in cavities on the outer surfaces of the fixed die plate (1) and the movable die plate (3) and cores in the first top plate (8) and the semicircular groove (14), and the specific shapes of the cavities and the cores refer to the appearance of the injection molding piece (4).

6. The core pulling structure of an injection mold according to claim 1, characterized in that: the spring (11) is horizontally placed, the spring (11) is in a stretching state initially, and is in a compressing state after core pulling is finished.

7. The core pulling structure of an injection mold according to claim 1, characterized in that: the first top board (8) can be extended or contracted in an initial state.