CN223998907U - Ejection structure for demolding of injection mold - Google Patents

Abstract

This utility model discloses an ejection structure for demolding injection molds, including mold base plates respectively installed on both sides and connected to the injection molding machine frame, and a positioning frame fixedly installed between the mold base plates. The positioning frame is fixedly installed to one set of mold base plates via four sets of propulsion cylinders, and the positioning frame is fixedly installed to another set of mold base plates via four sets of fixing rods. A movable mold base is connected to one side of the positioning frame via the propulsion cylinders, and a fixed module is fixedly installed on the mold base plate on one side of the movable mold base. A movable mold assembly is installed between the movable mold base and the fixed module. A plastic part is injection molded between the movable mold assembly and the fixed module. This utility model ensures the integrity of the injection molded snap-fit demolding, avoiding deformation or breakage of the snap-fit due to external pressure when demolding plastic parts containing other snap-fit components, thus ensuring the integrity of the plastic part demolding.

Description

Ejection structure for demolding of injection mold

Technical Field

The utility model belongs to the technical field of injection molding machines, and particularly relates to an ejection structure for demolding an injection mold.

Background

Injection molding machines are also known as injection molding machines or injection molding machines. It is a main forming equipment for making thermoplastic plastics or thermosetting plastics into various shaped plastic products by using plastic forming mould. The device is divided into vertical type, horizontal type and full-electric type. The injection molding machine heats the plastic, applies high pressure to the molten plastic, and injects the molten plastic to fill the mold cavity. Demolding is the last element in an injection molding cycle. When the mould is designed, a proper demoulding mode is selected according to the structural characteristics of the product so as to ensure the quality of the product.

The utility model discloses a demolding mechanism for an injection mold, which belongs to the field of injection molds and particularly relates to the field of injection molds, wherein an injection molding cavity is formed in the injection molding fixed mold, an ejection demolding plate is fixedly arranged at the bottom end of the guide rod, a telescopic connecting rod is fixedly arranged on the top surface of the ejection demolding plate, the other end of the telescopic connecting rod is embedded and arranged on the bottom surface of the injection molding fixed mold, a pumping air ejection mechanism is fixedly arranged on the top surface of the ejection demolding plate, an air valve accommodating cavity is formed in the inner side of the injection molding cavity, and a negative pressure eliminating mechanism is movably arranged in the air valve accommodating cavity. Said utility model adopts pneumatic supercharging mode to make ejection of plastic piece, and can accurately control the forming time of plastic piece, otherwise can make air be fed into the non-formed plastic piece to form air bubble so as to affect the forming of plastic piece. And the ejector rod demolding in the other demolding mode is inconvenient to demold the plastic part with the special-shaped structure. Although the plastic part product is cooled and molded, due to the special-shaped structure inside the plastic part product, the product is possibly stressed unevenly during demolding, and the defects of deformation and the like of the special-shaped structure are caused during ejection.

Disclosure of utility model

In order to solve the technical problems, the utility model provides an ejection structure for demolding an injection mold, which comprises mold frame plates respectively arranged at two sides and in butt joint with a frame of the injection molding machine, and positioning frames fixedly arranged between the mold frame plates. The locating rack and one group of the die carrier plates are fixedly installed through four groups of pushing oil cylinders, and the locating rack and the other group of the die carrier plates are fixedly installed through four groups of fixing rods. And one side of the locating frame is connected with a movable die frame through the pushing oil cylinder, and a fixed die block is fixedly arranged on the die frame plate on one side of the movable die frame. And a movable module is arranged between the movable mould frame and the fixed mould block. And a plastic part is injection molded between the movable module and the fixed module.

The movable mould frame is pushed by the pushing oil cylinder, so that the movable mould group moves to the inside of the fixed mould group, and plastic parts are injection molded.

As a further preferable technical scheme of the utility model, a positioning block is fixedly arranged on one side of the positioning frame. The pushing oil cylinder penetrates through the positioning frame to be provided with a pushing rod, and the movable die frame and the end part of the pushing rod are fixedly arranged.

The pushing rod is pushed to move by the pushing oil cylinder, so that the pushing rod pushes the movable die frame to move, and the processes of die assembly and die release in injection molding are achieved.

As a further preferable technical scheme of the utility model, a through hole is formed in the middle of the movable die frame. One side of the movable die frame is slidably provided with a movable die plate, and the movable die plate and the movable die frame are slidably arranged through two groups of guide blocks. And the movable mould frame is provided with a guide groove matched with the guide block to slide. And a top block fixedly arranged on the movable template is arranged between the guide blocks and positioned at the position of the through hole. And one side of the movable template is connected and provided with an auxiliary plate through four groups of auxiliary springs, and the auxiliary springs are internally provided with thimble guide rods fixedly arranged on the movable template. The auxiliary plate is provided with a through hole matched with the thimble guide rod, and the thimble guide rod is arranged on one side of the auxiliary plate in an extending mode.

When the pushing rod pushes the movable die set to integrally move, the auxiliary plate pushes the movable die set to integrally move into the fixed die set. When demoulding, the movable mould frame drives the movable mould plate to move, so that the auxiliary plate firstly drives the movable mould set to move backwards.

The movable module comprises an inner module fixedly arranged on one side of the auxiliary plate, an outer module slidably arranged with the inner module and a pushing plate arranged on one side of the outer module. The outer module and the pushing plate are connected and installed through four groups of connecting springs. And the outer module and the pushing plate are provided with guide holes matched with the fixed rod to slide.

When demoulding, the movable mould frame drives the movable mould plate to move, so that the auxiliary plate firstly drives the inner module to move, and after the auxiliary plate moves to a designated place, the inner module drives the outer module to move backwards, and the outer module is connected with the pushing plate through the connecting spring, so that the outer module and the pushing plate integrally move. The demolding effect is achieved.

As a further preferable technical scheme of the utility model, the plastic part is internally provided with an injection molding buckle. And the top and the bottom of the inner die are fixedly provided with inclined clamping blocks. The mounting frame is installed to outer module one side joint, be located on the mounting frame outer module inside fixed mounting has the butt joint piece.

In the demolding process, the injection molding buckle is arranged inside the plastic part, so that the inside and the outside of the plastic part are required to be demolding twice, and the integrity of the injection molding buckle can be ensured. When the inner module is demolded and separated, when the inner module is separated from the injection molding buckle position, the inclined clamping block is clamped and limited with the butt joint block on the outer module to drive the outer module to be demolded together, so that the demolding effect of the plastic piece is ensured.

According to the further preferable technical scheme, mounting plates are fixedly mounted on the top and the bottom of the fixed die block, and the mounting plates are mounted with the die carrier plates through mounting buckles in a clamping manner. The inside injection molding groove that is equipped with of cover half piece, just cover half piece central point puts and has seted up the sprue.

And injecting materials into the injection groove through the main runner by an injection mechanism of the injection molding machine, so that the materials are injection molded and cooled in the injection groove, and then demoulding is completed.

Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

1. In the demolding process, the injection molding buckle is arranged inside the plastic part, so that the inside and the outside of the plastic part are required to be demolding twice, and the integrity of the injection molding buckle can be ensured. When the inner module is demolded and separated, when the inner module is separated from the injection molding buckle position, the inclined clamping block is clamped and limited with the butt joint block on the outer module to drive the outer module to be demolded together, so that the demolding effect of the plastic piece is ensured. The integrity of demolding of the injection molding buckle is guaranteed by demolding twice, the situation that deformation or fracture is caused by external extrusion of the buckle when the plastic part with other buckles inside is once demolded is avoided, and the integrity of demolding of the plastic part is guaranteed.

2. When the auxiliary plate drives the movable module to integrally move backwards to the ejector block to collide with the positioning block, the guide block slides out of the guide groove along with the backward movement of the auxiliary plate, so that the movable template pushes the ejector pin guide rod in the auxiliary spring to move according to the positioning of the ejector block, the ejector pin guide rod ejects the pushing plate, and the pushing plate pushes the plastic part to achieve the ejection effect in the demolding process. Ensuring the smoothness of the complete demoulding process of the plastic part.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is an enlarged schematic view of FIG. 2A;

FIG. 4 is a schematic cross-sectional view of the module of the present utility model;

FIG. 5 is an enlarged schematic view of the structure shown at B in FIG. 4;

Fig. 6 is a schematic cross-sectional view of the module of the present utility model.

In the figure, 1, a die frame plate, 11, a pushing cylinder, 12, a pushing rod, 13, a fixed rod, 2, a locating frame, 21, a locating block, 3, a movable die frame, 31, a movable die plate, 32, a guide groove, 33, a guide block, 34, a top block, 35, a through hole, 36, an auxiliary spring, 37, an auxiliary plate, 38, a thimble guide rod, 4, a movable die set, 41, an inner die set, 411, an inclined clamping block, 42, an outer die set, 421, a mounting frame, 422, a butt joint block, 43, a pushing plate, 44, a connecting spring, 45, a guide hole, 5, a fixed die set, 51, an injection molding groove, 52, a mounting plate, 53, a mounting buckle, 54, a main flow passage, 6, a plastic piece and 61, an injection molding buckle.

Detailed Description

The specific embodiment is an ejection structure for demolding an injection mold.

Said utility model adopts pneumatic supercharging mode to make ejection of plastic piece, and can accurately control the forming time of plastic piece, otherwise can make air be fed into the non-formed plastic piece to form air bubble so as to affect the forming of plastic piece. And the ejector rod demolding in the other demolding mode is inconvenient to demold the plastic part with the special-shaped structure. Although the plastic part product is cooled and molded, due to the special-shaped structure inside the plastic part product, the product is possibly stressed unevenly during demolding, and the defects of deformation and the like of the special-shaped structure are caused during ejection.

The structure is schematically shown in fig. 1-6. An ejection structure for demolding of an injection mold comprises mold frame plates 1 which are respectively arranged at two sides and are in butt joint with a frame of the injection molding machine, and positioning frames 2 which are fixedly arranged between the mold frame plates 1. The locating rack 2 and one group of mould frame plates 1 are fixedly installed through four groups of pushing oil cylinders 11, and the locating rack 2 and the other group of mould frame plates 1 are fixedly installed through four groups of fixing rods 13. One side of the positioning frame 2 is connected with the movable mould frame 3 through a thrust cylinder 11, and a fixed module 5 is fixedly arranged on the mould frame plate 1 on one side of the movable mould frame 3. One side of the locating frame 2 is fixedly provided with a locating block 21. The pushing oil cylinder 11 penetrates through the positioning frame 2 to be provided with a pushing rod 12, and the movable die frame 3 is fixedly arranged at the end part of the pushing rod 12. The pushing rod 12 is pushed to move by the pushing oil cylinder 11, so that the pushing rod 12 pushes the movable die frame 3 to move, and the processes of die assembly and die release in injection molding are achieved. A movable module 4 is arranged between the movable mould frame 3 and the fixed mould block 5. A plastic part 6 is injection molded between the movable module 4 and the fixed module 5.

A through hole 35 is arranged in the middle of the movable mould frame 3. A movable template 31 is slidably arranged on one side of the movable mould frame 3, and the movable template 31 and the movable mould frame 3 are slidably arranged through two groups of guide blocks 33. The movable mould frame 3 is provided with a guide groove 32 matched with the guide block 33 to slide. A top block 34 fixedly installed on the movable die plate 31 is arranged between the guide blocks 33 at the position of the through hole 35. An auxiliary plate 37 is connected and mounted on one side of the movable template 31 through four groups of auxiliary springs 36, and a thimble guide rod 38 fixedly mounted on the movable template 31 is arranged in the auxiliary springs 36. The auxiliary plate 37 is provided with a through hole matched with a thimble guide rod 38, and the thimble guide rod 38 is arranged on one side of the auxiliary plate 37 in an extending way. When the pushing rod 12 pushes the movable die carrier 3 to move integrally, the auxiliary plate 37 pushes the movable die set 4 to move integrally into the fixed die set 5. During demolding, the movable mold frame 3 drives the movable mold plate 31 to move, so that the auxiliary plate 37 firstly drives the movable mold 4 to move backwards. The movable module 4 includes an inner module 41 fixedly installed at one side of the auxiliary plate 37, an outer module 42 slidably installed with the inner module 41, and a push plate 43 installed at one side of the outer module 42. The outer module 42 and the pushing plate 43 are connected and installed through four groups of connecting springs 44. The outer module 42 and the pushing plate 43 are provided with guide holes 45 which are matched with the fixed rod 13 to slide. When demoulding, the movable mould frame 3 drives the movable mould plate 31 to move, so that the auxiliary plate 37 firstly drives the inner mould block 41 to move, after the movable mould plate moves to a designated place, the inner mould block 41 drives the outer mould block 42 to move backwards, and the outer mould block 42 and the pushing plate 43 are integrally moved due to the fact that the outer mould block 42 is connected with the pushing plate 43 through the connecting spring 44. The demolding effect is achieved. When the auxiliary plate 37 drives the movable module 4 to move backwards to the jacking block 34 to collide with the positioning block 21, the guide block 33 slides out of the guide groove 32 along with the backward movement of the auxiliary plate 37, so that the movable template 31 pushes the thimble guide rod 38 in the auxiliary spring 36 to move according to the positioning of the jacking block 34, and the thimble guide rod 38 ejects the pushing plate 43, so that the pushing plate 43 pushes the plastic part 6, and the ejection effect in the demolding process is achieved. Ensuring the smoothness of the complete demolding procedure of the plastic piece 6.

The plastic part 6 is internally provided with an injection molding buckle 61. The top and the bottom of the inner module 41 are fixedly provided with inclined clamping blocks 411. The mounting bracket 421 is installed in the joint of outer module 42 one side, is located the inside fixed mounting of outer module 42 on the mounting bracket 421 and has the butt joint piece 422. In the demolding process, the injection molding buckle 61 is arranged inside the plastic piece 6, so that the inside and the outside of the plastic piece need to be demolded twice, and the integrity of the injection molding buckle 61 can be ensured. When the inner module 41 is demolded and separated, when the inner module 41 is separated from the injection molding buckle 61, the inclined clamping blocks 411 are clamped and limited with the butting blocks 422 on the outer module 42 to drive the outer module 42 to be demolded together, so that the demolding effect of the plastic piece 6 is ensured. The integrity of demolding of the injection molding buckle 61 is guaranteed by demolding twice, the situation that deformation or fracture is caused by external extrusion of the buckle when the plastic part 6 with other buckles inside is once demolded is avoided, and the integrity of demolding of the plastic part 6 is guaranteed. The top and the bottom of the fixed module 5 are fixedly provided with mounting plates 52, and the mounting plates 52 and the mould frame plates 1 are clamped and mounted through mounting buckles 53. An injection molding groove 51 is formed in the fixed module 5, and a main runner 54 is formed in the center of the fixed module 5. The injection mechanism of the injection molding machine injects the material into the injection molding groove 51 through the main runner 54, so that the material is injection molded and cooled in the injection molding groove 51, and then the demolding is completed.

First, when the movable mold frame 3 is pushed to move entirely by the pushing rod 12, the movable mold frame 4 is pushed to move entirely inside the fixed mold block 5 by the auxiliary plate 37. The injection mechanism of the injection molding machine injects materials into the injection molding groove 51 through the main runner 54, the materials are injection molded and cooled in the injection molding groove 51, and then the movable mold plate 31 is driven to move by the movable mold frame 3, so that the auxiliary plate 37 firstly drives the movable mold 4 to move backwards for demolding. When demoulding, the movable mould frame 3 drives the movable mould plate 31 to move, so that the auxiliary plate 37 firstly drives the inner mould block 41 to move, after the movable mould plate moves to a designated place, the inner mould block 41 drives the outer mould block 42 to move backwards, and the outer mould block 42 and the pushing plate 43 are integrally moved due to the fact that the outer mould block 42 is connected with the pushing plate 43 through the connecting spring 44. The demolding effect is achieved. When the auxiliary plate 37 drives the movable module 4 to move backwards to the jacking block 34 to collide with the positioning block 21, the guide block 33 slides out of the guide groove 32 along with the backward movement of the auxiliary plate 37, so that the movable template 31 pushes the thimble guide rod 38 in the auxiliary spring 36 to move according to the positioning of the jacking block 34, and the thimble guide rod 38 ejects the pushing plate 43, so that the pushing plate 43 pushes the plastic part 6, and the ejection effect in the demolding process is achieved. Ensuring the smoothness of the complete demolding procedure of the plastic piece 6.

All technical features in the embodiment can be freely combined according to actual needs.

The foregoing embodiments are preferred embodiments of the present utility model, and in addition, the present utility model may be implemented in other ways, and any obvious substitution is within the scope of the present utility model without departing from the concept of the present utility model.

Claims (6)

1. The utility model provides an ejecting structure for injection mold drawing of patterns, its characterized in that, including installing respectively die carrier board (1) and fixed mounting of both sides and injection molding machine frame butt joint installation be in locating rack (2) between die carrier board (1), locating rack (2) and a set of run through fixed mounting through four sets of thrust cylinders (11) between die carrier board (1), just locating rack (2) with another set through four sets of dead lever (13) fixed mounting between die carrier board (1), locating rack (2) one side is passed through thrust cylinders (11) are connected and are installed movable die carrier (3), just fixed mounting has fixed module (5) on die carrier board (1) of movable die carrier (3) one side, movable die carrier (3) with install movable die set (4) between fixed die module (5), movable die set (4) with injection molding plastic part (6) between fixed die module (5).

2. The ejection structure for demolding of an injection mold according to claim 1, wherein a positioning block (21) is fixedly arranged on one side of the positioning frame (2), the pushing oil cylinder (11) penetrates through the positioning frame (2) and is provided with a pushing rod (12), and the movable mold frame (3) and the end part of the pushing rod (12) are fixedly arranged.

3. The ejection structure for demolding of an injection mold according to claim 2, wherein a through hole (35) is formed in the middle of the movable mold frame (3), a movable mold plate (31) is slidably mounted on one side of the movable mold frame (3), the movable mold plate (31) and the movable mold frame (3) are slidably mounted through two groups of guide blocks (33), a guide groove (32) matched with the guide blocks (33) to slide is formed in the movable mold frame (3), an ejector block (34) fixedly mounted on the movable mold plate (31) is arranged between the guide blocks (33) at the position of the through hole (35), an auxiliary plate (37) is mounted on one side of the movable mold plate (31) in a connecting mode through four groups of auxiliary springs (36), ejector pin guide rods (38) fixedly mounted on the movable mold plate (31) are arranged in the auxiliary springs (36), through holes are formed in the auxiliary plates (37) in a matched mode, and the ejector pins (38) extend to one side of the auxiliary plates (37).

4. An ejector structure for demolding an injection mold according to claim 3, wherein the movable mold assembly (4) comprises an inner mold assembly (41) fixedly mounted on one side of the auxiliary plate (37), an outer mold assembly (42) slidably mounted with the inner mold assembly (41), and a pushing plate (43) mounted on one side of the outer mold assembly (42), wherein the outer mold assembly (42) and the pushing plate (43) are mounted in a connecting manner through four groups of connecting springs (44), and guide holes (45) for sliding in cooperation with the fixing rods (13) are formed in the outer mold assembly (42) and the pushing plate (43).

5. The ejection structure for demolding of an injection mold according to claim 4, wherein injection molding buckles (61) are arranged in the plastic piece (6), oblique clamping blocks (411) are fixedly arranged at the top and the bottom of the inner mold (41), a mounting frame (421) is arranged on one side of the outer mold (42) in a clamping manner, and a butt joint block (422) is fixedly arranged in the outer mold (42) on the mounting frame (421).

6. The ejection structure for demolding of an injection mold according to claim 5, wherein the top and the bottom of the fixed mold block (5) are fixedly provided with mounting plates (52), the mounting plates (52) and the mold frame plate (1) are mounted in a clamping manner through mounting buckles (53), an injection molding groove (51) is formed in the fixed mold block (5), and a main runner (54) is formed in the center of the fixed mold block (5).