CN112519156A

CN112519156A - Injection mold with inside clamping mechanism

Info

Publication number: CN112519156A
Application number: CN202011287978.2A
Authority: CN
Inventors: 李成; 王益; 陆建远
Original assignee: Jiangsu Lianmei Industrial Identification Technology Co ltd
Current assignee: Jiangsu Lianmei Industrial Identification Technology Co ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-03-19

Abstract

The invention provides an injection mold with an internal mold locking mechanism, and belongs to the technical field of grinding tools; the guide post device comprises a fixed die and a movable die which are connected, wherein the fixed die is provided with a guide post hole; the guide pillar hole extends into the movable die; a guide pillar is arranged in the guide pillar hole; the guide post is in threaded connection with a slide block; the upper surface of the sliding block is provided with a third threaded hole matched with the guide pillar; a first threaded hole penetrating through the side face of the sliding block is formed in the side face of the sliding block; a screw rod is connected with an internal thread of the threaded hole; the upper surface and the lower surface of the sliding block are connected with sliding groove holes in a sliding mode; four corners of the lower surface of the movable mold at the mold closing position are provided with mold locking lugs; four corners of the upper surface of the fixed die at the die assembly position are provided with die locking notches; the mold locking lug is matched with the mold locking notch; the mold locking is reliable through the mold locking lug and the mold locking notch, the mold expansion can be effectively prevented, and the mold locking structure is simple and compact through the matching of the sliding grooves of the bolt, the guide pillar and the sliding block.

Description

Injection mold with inside clamping mechanism

Technical Field

The invention belongs to the technical field of molds, and particularly relates to an injection mold with an internal mold locking mechanism.

Background

Injection molds are forming tools used to produce injection molded articles. The mold has a high pressure inside the cavity during injection, which causes a tendency of relative separation between the movable mold and the fixed mold. It is necessary to always apply a force to overcome the pressure inside.

The existing injection molding machine is generally realized by using a mold opening and closing oil cylinder. However, the oil cylinder has a certain leakage amount, so that the phenomenon that the movable die and the fixed die are loosened is caused if the oil cylinder is not communicated with the pressure oil; if the hydraulic pump is always in a state of being communicated with pressure oil, the hydraulic pump connected with the mold opening and closing oil cylinder generally has a large displacement, and if the hydraulic pump is in a high-pressure small-flow state for a long time, the service life of the hydraulic pump is influenced. At present, the direct-pressure secondary mold locking device commonly adopted can lock the mold, but has a complex structure, can greatly increase the production cost of the injection molding machine, and easily causes the mold expansion phenomenon after the mold is processed for a period of time, so that the product rejection rate is increased.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to solve the technical problem of providing the injection mold with the internal mold locking mechanism, which has the advantages of simple structure, large mold locking force and difficult looseness, is convenient to disassemble, can well lock the movable mold and the fixed mold together in the injection molding process, and effectively prevents the mold from expanding.

In order to solve the technical problems, the invention provides the following technical scheme:

an injection mold with an internal mold locking mechanism comprises a connecting fixed mold and a movable mold, wherein a fixed mold web plate is arranged at the top of the fixed mold; a guide post hole is formed in the upper surface of the fixed die web plate; the guide pillar hole extends into the movable die; a guide pillar is arranged in the guide pillar hole; the guide pillar extends to the upper part of the fixed die web plate; the bottom of the guide post is provided with threads, and the guide post is in threaded connection with a sliding block; the upper surface of the sliding block is provided with a third threaded hole matched with the guide pillar; wear-resistant layers made of self-lubricating materials are arranged on the upper surface and the lower surface of the sliding block; a first threaded hole penetrating through the side face of the sliding block is formed in the side face of the sliding block; a screw rod is connected with an internal thread of the threaded hole; the screw rod extends to the outside of the movable mold; the upper surface and the lower surface of the sliding block are connected with sliding groove holes in a sliding mode; four corners of the lower surface of the movable mold at the mold closing position are provided with mold locking lugs; four corners of the upper surface of the fixed die at the die assembly position are provided with die locking notches; the mold locking lug is matched with the mold locking notch; the bottom of the fixed die is provided with a plurality of groups of die-drawing ejector rods and two groups of die feet; the bottom of the stripping ejector rod is connected with a top plate; and the bottom of the top plate is connected with a movable mould web plate.

As a further improvement of the invention: the surface of the guide post is provided with a plurality of groups of annular grooves; and an O-shaped ring is arranged in the annular groove.

As a further improvement of the invention: the slider shape is the cuboid.

As a further improvement of the invention: and a section of the screw rod, which is positioned outside the movable die, is provided with a rotating hand wheel.

As a further improvement of the invention: and a second threaded hole connected with the tail end of the screw rod is further formed in the inner wall of the sliding groove hole.

As a further improvement of the invention: and a rotating handle is arranged at one end of the guide pillar, which is positioned on the web plate of the fixed die.

As a further improvement of the invention: the wear-resistant layer made of the self-lubricating material is made of polytetrafluoroethylene.

Compared with the prior art, the invention has the beneficial effects that: the invention has the advantages that the mould locking is reliable through the mould locking lug and the mould locking notch, the mould expansion can be effectively prevented, and the effect of simple and compact mould locking structure is realized through the matching of the sliding grooves of the bolt, the guide pillar and the sliding block.

Drawings

FIG. 1 is a schematic structural view of an injection mold with an internal clamping mechanism;

FIG. 2 is an enlarged view of area A of FIG. 1;

FIG. 3 is an enlarged view of area B of FIG. 1;

FIG. 4 is an external view of a movable mold of an injection mold with an internal mold locking mechanism;

FIG. 5 is an external view of a stationary mold in an injection mold with an internal mold clamping mechanism;

in the figure: the die comprises a guide post 1, a rotating handle 2, a fixed die web 3, a fixed die 4, a movable die 5, a die pin 6, a movable die web 7, a movable die web 8, a top plate 9, a threaded hole II, a rotating hand wheel 10, a sliding groove hole 11, a wear-resistant layer 12, an O-shaped ring 13, a guide post hole 14, a threaded hole I15, a threaded hole I16, a screw rod 17, a sliding block 18, a threaded hole III 19, a die-stripping ejector rod 20, a die-locking lug 21, a die-locking notch 22 and an annular groove 22.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Example 1

Referring to fig. 1-5, the present embodiment provides an injection mold with an internal mold locking mechanism, which includes a connecting stationary mold 4 and a movable mold 5; a fixed die web plate 3 is arranged at the top of the fixed die 4; the upper surface of the fixed die web 3 is provided with a guide post hole 14; the guide pillar hole 14 extends into the movable mold 5; the guide post 1 is arranged in the guide post hole 14; the guide pillar 1 extends to the upper part of a fixed die web plate 3; a rotating handle 2 is arranged at one end of the guide pillar 1, which is positioned on a fixed die web 3; the surface of the guide post 1 is provided with a plurality of groups of annular grooves 22; an O-shaped ring 13 is arranged in the annular groove 22; the bottom of the guide post 1 is provided with threads, and the guide post 1 is connected with a slide block 17 through the threads; the slide block 17 is in a cuboid shape; the upper surface of the slide block 17 is provided with a third threaded hole 18 matched with the guide pillar 1; the upper surface and the lower surface of the sliding block 17 are provided with wear-resistant layers 12 made of self-lubricating materials; the wear-resistant layer 12 made of the self-lubricating material is made of polytetrafluoroethylene; a first threaded hole 15 penetrating through the side face of the sliding block is formed; a screw 16 is connected with the inner thread of the first threaded hole 15; the screw 16 extends to the outside of the movable mold 5; a section of the screw 16, which is positioned outside the movable mold 5, is provided with a rotating hand wheel 10; the upper surface and the lower surface of the sliding block 17 are connected with sliding groove holes 11 in a sliding mode; and a second threaded hole 9 connected with the tail end of the screw rod 16 is formed in the inner wall of the sliding groove hole 11.

When the die is used, the rotating handle 2 is rotated to drive the bolt 16 to rotate, and the sliding block 17 in threaded connection with the bolt 16 is a cuboid, and the sliding groove hole 11 matched with the sliding block 17 is also a cuboid, so that the sliding block 17 cannot rotate; will move axially along the surface of the screw 16; when one end of the slide block moves to the innermost side of the slide groove hole 111, the slide block can not move inwards any more, and at the moment, the guide post 1 is inserted; the tail end of the guide post 1 is just inserted into a threaded hole III 18 of the sliding block 17, and the rotating handle 2 is rotated to lead the guide post 1 to be in threaded connection with the sliding block 17; locking the movable mold 5 and the fixed mold 4; the guide post 1 is also provided with an annular groove 22, and the annular groove 22 is provided with the O-shaped ring 13, so that when the guide post 1 is inserted into the guide post hole 14 in the die assembly process, the O-shaped ring 13 can be contacted with the inner wall in the guide post hole 14 to avoid collision and abrasion between the guide post 1 and the guide post hole 14 to a certain extent due to vibration; meanwhile, the O-shaped ring 13 has a certain sealing function, so that air in the guide post hole 14 can be compressed, and the impact strength generated between the movable mold 5 and the fixed mold 4 during mold closing is reduced.

Example 2

Referring to fig. 1, 4 and 5, in this embodiment, compared with embodiment 1, an injection mold with an internal mold locking mechanism is provided, where four corners of a mold closing position of a lower surface of a movable mold 5 are provided with mold locking bumps 20; four corners of the upper surface of the fixed die 4 at the die assembly position are provided with die locking notches 21; the mold locking convex block 20 is matched with the mold locking notch 21; the bottom of the fixed die 5 is provided with a plurality of groups of die-drawing ejector rods 19 and two groups of die feet 6; the bottom of the stripping ejector rod 19 is connected with a top plate 8; the top plate 8 is arranged on the upper surface of the movable mould web plate 7.

In the device, when the mold is closed, the mold locking lug 20 is inserted into the mold locking notch 21 to form the four-corner mold locking, and particularly, the mold locking lug 20 and the movable mold are integrally processed, so that the mold locking is reliable, the mold expansion can be effectively prevented, and the product quality is ensured; the ejection plate 8 is arranged between the two mold feet 64, at least 4 mold-stripping ejector rods 19 are arranged on the ejection plate 8, the mold-stripping ejector rods 19 penetrate through the movable mold 5 to be contacted with a product formed in the cavity, the ejection plate 8 is pushed by a push rod of an injection molding machine during mold opening, and the molded product is ejected out of the mold by the mold-stripping ejector rods 19, so that automatic ejection is realized.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. An injection mold with an internal mold locking mechanism is characterized by comprising a fixed mold (4) and a movable mold (5); a fixed die web plate (3) is arranged at the top of the fixed die (4); the upper surface of the fixed die web plate (3) is provided with a guide post hole (14); the guide pillar hole (14) extends into the movable mold (5); a guide post (1) is arranged in the guide post hole (14); the guide pillar (1) extends to the upper part of the fixed die web plate (3); the bottom of the guide post (1) is provided with threads, and the guide post (1) is connected with a slide block (17) through the threads; the upper surface of the sliding block (17) is provided with a third threaded hole (18) matched with the guide pillar (1); the upper surface and the lower surface of the sliding block (17) are provided with wear-resistant layers (12) made of self-lubricating materials; a first threaded hole (15) penetrating through the side face of the sliding block is formed; a screw rod (16) is connected with the internal thread of the first threaded hole (15); the screw rod (16) extends to the outside of the movable mold (5); the upper surface and the lower surface of the sliding block (17) are connected with sliding groove holes (11) in a sliding way; four corners of the lower surface of the movable mold (5) at the mold closing position are provided with mold locking lugs (20); four corners of the upper surface of the fixed die (4) at the die assembly position are provided with die locking notches (21); the mold locking convex block (20) is matched with the mold locking notch (21); the bottom of the fixed die (5) is provided with a plurality of groups of die drawing ejector rods (19) and two groups of die feet (6); the bottom of the stripping ejector rod (19) is connected with a top plate (8); and the bottom of the top plate (8) is connected with a movable mould web plate (7).

2. An injection mould with internal clamping mechanism according to claim 1, characterized in that the surface of the guide post (1) is provided with several sets of annular grooves (22); an O-shaped ring (13) is arranged in the annular groove (22).

3. An injection mould with internal clamping mechanism according to claim 2, characterised in that the slide (17) is cuboid in shape.

4. An injection mould with an internal clamping mechanism according to claim 1 or 2, characterised in that the end of the screw (16) located outside the moving mould (5) is provided with a rotating hand wheel (10).

5. The injection mold with the internal mold locking mechanism as claimed in claim 3, wherein the inner wall of the sliding groove hole (11) is further provided with a second threaded hole (9) connected with the tail end of the screw rod (16).

6. An injection mould with internal clamping mechanism according to claim 5, characterized in that the guide post (1) is provided with a turning handle (2) towards the end of the stationary mould web (3).

7. An injection mould with internal clamping mechanism according to claim 6, characterised in that the wear resistant layer (12) of self-lubricating material is polytetrafluoroethylene.