CN212194077U - Demoulding mechanism for meter box cover - Google Patents

Abstract

The utility model relates to a demoulding mechanism for a box cover of a meter box, which comprises a fixed die core, wherein the upper part of the rear surface is provided with a first guide hole which is inclined and extends upwards gradually from back to front; the movable mould is arranged behind the fixed mould core and can move back and forth relative to the fixed mould core, and a first guide column which can be inserted into the first guide hole is arranged on the front surface facing the fixed mould core; the movable mould core is arranged between the movable mould and the fixed mould core and is relatively fixed with the movable mould, a notch is formed in the position, close to the movable mould, of the top of the movable mould core, and a cavity is formed between the movable mould core and the fixed mould core; the first demoulding block is arranged on the movable mould, the lower part of the first demoulding block is partially positioned in the notch, and the lower part of the front surface of the first demoulding block is provided with a flange which protrudes upwards and is used for being matched with the bent part in an inserting way; the first demoulding block is provided with a first through hole for the first guide column to penetrate through, and the demoulding block moves towards the notch under the action of the first guide column under the condition that the movable mould moves backwards relative to the fixed mould so as to enable the flange to be separated from the top wall plate. The top of the watch box cover can be automatically demoulded.

Description

Demoulding mechanism for meter box cover

Technical Field

The utility model relates to a demoulding mechanism, concretely relates to demoulding mechanism for table case lid.

Background

Electric meter boxes are widely used, and are containers for installing meters and switches, which are indispensable in every residential building or power supply department.

Current ammeter case is like the ammeter case that the chinese utility model patent of patent number ZL201821493416.1 (the grant bulletin number is CN208969146U) discloses that split type switch covers ammeter case includes the table case, the table case on be provided with detachable switch cover, the switch cover on be provided with first positioning bolt hole, switch cover below be provided with two lugs, first positioning bolt hole and two lugs be triangular distribution, the table case on be provided with two holding tanks and a reference column, the lug fill in to the holding tank in.

Foretell ammeter case box (case lid) adopts integrative injection moulding between cover half benevolence and movable mould benevolence, the roof board of common ammeter case sets up barb (kink), at the in-process of drawing of patterns, the kink of top wallboard colludes easily on the movable mould benevolence of movable mould subassembly, can't break away from injection moulding's table case lid and can't realize the drawing of patterns, if the drawing of patterns by force, can make the kink of the top wallboard of table case lid take place to warp and break even and scrap, and in order to realize the drawing of patterns, the roof board that will show the case lid through needs manual work breaks away from movable mould benevolence, the drawing of patterns efficiency has been reduced, and artifical drawing of patterns also very big probably will show the kink damage.

Therefore, further improvements to existing ejector mechanisms are needed.

Disclosure of Invention

The utility model aims to solve the technical problem that to the current situation of above-mentioned prior art, a make things convenient for drawing of patterns in top of table case lid to provide a demoulding mechanism for table case lid.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a demoulding mechanism for table case lid, its characterized in that includes

The upper part of the rear surface of the fixed die core is provided with a first guide hole which is inclined and extends upwards gradually from back to front;

the movable die is arranged behind the fixed die core and can move back and forth relative to the fixed die core, and a first guide column which is consistent with the extending direction of the first guide hole and can be inserted into the first guide hole to move back and forth is arranged on the front surface of the movable die facing the fixed die core;

the movable mould core is arranged between the movable mould and the fixed mould core, is relatively fixed with the movable mould, is positioned below the first guide column, is provided with a notch at the position close to the movable mould at the top of the movable mould core, and forms a cavity for injection molding of the cover of the meter box with the fixed mould core;

the first demoulding block is arranged on the movable mould and positioned above the movable mould core, the lower part of the first demoulding block is partially positioned in the gap, and the lower part of the front surface of the first demoulding block is provided with a flange which protrudes upwards and is used for being in splicing fit with a bent part of a top wall plate of the box cover formed in the mould cavity; the first demoulding block is provided with a first through hole which is consistent with the extending direction of the first guide column and through which the first guide column penetrates, and the demoulding block moves towards the notch under the action of the first guide column under the condition that the movable mould moves backwards relative to the fixed mould so as to enable the flange to be separated from the top wall plate of the box cover in the cavity.

To facilitate the mounting of the watch case cover, preferably, the lower edge of the front surface of the first knock-out block has an extension plate extending forward, and the flange is provided on the upper surface of the extension plate.

In order to enable the first demolding block to be arranged on the movable mold in a vertically sliding mode, a first containing groove for containing the first demolding block is formed in the movable mold, limiting parts for limiting the first demolding block to move towards the direction far away from the gap are arranged in the first containing groove along the width direction of the movable mold and on the left side and the right side of the first demolding block, and the first demolding block is limited between the two limiting parts in a sliding mode.

In order to prevent the first barb at the left side part of the meter box cover from hooking the demolding mechanism in the demolding process, the demolding mechanism further comprises a second demolding module which is arranged on the movable die core and is positioned at the left side of the movable die core, a first groove which extends from front to back and downwards and is used for accommodating the first barb at the left side of the box cover formed in the cavity is formed in the right side surface of the second demolding module, and the first groove is in an inverted L shape; the second demolding block penetrates through a second through hole which is obliquely extended from back to front gradually to the right side, correspondingly, a second guide column which is consistent with the extension direction of the second through hole and penetrates out of the second through hole is arranged on the front surface of the movable mold in a protruding mode, a second guide hole which is consistent with the extension direction of the second guide column and is used for the second guide column to slide back and forth is formed in the fixed mold core, and the second demolding block moves towards the left side under the action of the second guide column under the condition that the movable mold moves backwards relative to the fixed mold so that the first groove is separated from the first barb in the mold cavity. So, in the moving die and the moving die core relative to the fixed die and towards the moving process of keeping away from the fixed die, the second demoulding block is separated from the first barb, so that the left side part of the meter box cover is separated from the limitation of the second demoulding block, and then the demoulding of the left side part of the meter box cover is realized.

In order to facilitate the injection molding of the left side of the watch box cover to form the first barb, a first accommodating cavity for accommodating the first barb is formed between the left side surface of the movable die core and the first groove of the second demoulding piece.

In order to facilitate the left and right movement of the second demoulding piece, a second containing groove for containing the second demoulding piece is formed in the movable mould, and the second demoulding piece moves left and right along the width direction of the movable mould.

In order to prevent the second barb on the right side part of the meter box cover from hooking the demolding mechanism in the demolding process, the demolding mechanism further comprises a third demolding module which is arranged on the movable die core and is positioned on the right side of the movable die core, a second groove which extends from front to back and downwards and is used for accommodating the second barb on the right side of the box cover formed in the cavity is formed in the left side surface of the third demolding module, and the second groove is in an inverted L shape; the third demolding block penetrates through a third through hole which is obliquely extended from back to front gradually to left side, correspondingly, a third guide column which is consistent with the extension direction of the third through hole and can penetrate through the third through hole is arranged on the front surface of the movable mold in a protruding mode, a third guide hole which is consistent with the extension direction of the third guide column and is used for the third guide column to slide back and forth is formed in the fixed mold core, and the third demolding block moves towards the right side under the action of the third guide column under the action of the movable mold in the state that the movable mold moves backwards relative to the fixed mold so that the second groove is separated from the second barb in the mold cavity. So, in the moving process that the moving die and the moving die core move towards the direction far away from the fixed die relative to the fixed die, the third demoulding block is separated from the second barb, so that the right side part of the meter box cover is separated from the limitation of the third demoulding block, and then the demoulding of the right side part of the meter box cover is realized.

In order to facilitate the injection molding of the right side part of the watch box cover to form the second barb, a second accommodating cavity for accommodating the second barb is formed between the right side surface of the movable die core and the second groove of the third demoulding block.

In order to facilitate the left and right movement of the second demoulding piece, a third containing groove for containing the third demoulding piece is formed in the movable mould, and the third demoulding piece moves left and right along the width direction of the movable mould.

In order to facilitate the moving of the movable mold and the movable mold core, a thimble assembly connected with a power output end of the injection molding machine is arranged on the rear surface of the movable mold, and the thimble assembly is driven by the injection molding machine to move backwards relative to the fixed mold core.

Compared with the prior art, the utility model discloses an in-process that first demoulding piece removed backward at the relative cover half benevolence of movable mould and movable mould benevolence can the downstream and make first drawing of patterns piece break away from spacing to the kink of table case lid, so, at the in-process of drawing of patterns, table case lid can break away from cover half benevolence and movable mould benevolence and realize automatic drawing of patterns under the effect of movable mould and movable mould benevolence, and the drawing of patterns process is convenient, and prevent to cause the deformation to the kink on the table case lid roof board, and whole demoulding mechanism reasonable in design.

Drawings

Fig. 1 is a schematic structural view of a watch box cover according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a cross-sectional view at another angle in FIG. 2;

fig. 5 is a cross-sectional view of an embodiment of the invention;

fig. 6 is a cross-sectional view of another angle of an embodiment of the present invention;

fig. 7 is a cross-sectional view of an embodiment of the present invention through a second stripping module and a third stripping module;

FIG. 8 is a cross-sectional view of the second stripper block and the third stripper block of FIG. 7 in a moving state;

FIG. 9 is a schematic perspective view of the sub-structure of FIG. 2;

FIG. 10 is a schematic view of the core insert of FIG. 2;

FIG. 11 is a schematic structural view of the cavity block of FIG. 2;

FIG. 12 is a schematic structural view of the first stripping module in FIG. 2;

FIG. 13 is a schematic structural view of the second stripping module in FIG. 2;

fig. 14 is a schematic structural diagram of the third stripping module in fig. 2.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 14, the demolding mechanism for a meter box cover according to an embodiment of the present invention includes a cavity plate core 1, a cavity plate a, a movable mold 3, a movable mold core 2, a demolding plate 4, a first demolding module 5, a second demolding module 6, a third demolding module 7, and a thimble assembly 10.

As shown in fig. 2 to 9, the fixed mold core 1 and the movable mold core 2 are arranged from front to back, a cavity for injection molding of the meter box cover 9 is formed among the fixed mold core 1, the movable mold core 2, the first demolding module 5, the second demolding module 6 and the third demolding module 7, a demolding plate 4 is arranged on the rear surface of the fixed mold core 1 facing the cavity, and two demolding plates 4 are arranged at intervals left and right along the width direction of the fixed mold core 1. The rear surface of the cavity insert 1 is formed with two cavities 11 for accommodating the corresponding stripper plates 4, each stripper plate 4 is provided with a convex column 41 extending towards the direction of the corresponding cavity 11, a hole 111 for accommodating the corresponding convex column 41 is formed in the cavity 11, and the stripper plates 4 are installed in the cavities 11 by the matching of the corresponding convex columns 41 and the corresponding holes 111, as shown in fig. 9.

As shown in fig. 6, an elastic member is provided between the stripper plate 4 and the rear surface of the cavity block 1 to always move the stripper plate 4 toward the cavity so that the cover 9 in the cavity moves away from the cavity block 1. Specifically, the elastic piece is a spring 8, four springs 8 are arranged on one demolding plate 4, the springs 8 are arranged at intervals along the circumferential direction of the insertion hole 111, a containing hole 112 for containing the spring 8 is formed in the rear surface of the cavity 11, the first end of the spring 8 is connected with the end face of the containing hole 112, the second end of the spring 8 is connected with the demolding plate 4, the spring 8 is in an energy storage state when the fixed mold core 1 and the movable mold core 2 are in a mold closing state, and therefore when the surface case cover is formed in the cavity and demolding is started, the spring 8 acts on the demolding plate 4 and has a tendency of pushing the surface case cover 9 in the cavity to move towards the direction of the movable mold core 2, and therefore the surface case cover 9 is prevented from being stuck on the fixed mold core 1.

As shown in fig. 2 to 9, in the fixed mold on the front side of the fixed mold core 1, the fixed mold is fixed relative to the fixed mold core 1, and the fixed mold is fixed relative to the housing of the injection molding machine, a glue injection port a1 communicated with the cavity is formed in the fixed mold a, the movable mold core 2 is fixed on the front surface of the movable mold 3, an ejector pin assembly 10 connected to the power output end of the injection molding machine is disposed on the rear surface of the movable mold 3, the ejector pin assembly 10 includes an ejector pin plate 101 connected to the power output end of the injection molding machine and ejector pins 102 connected to the ejector pin plate 101 and the movable mold core 3, the ejector pins 102 are provided with a plurality of ejector pins and are located between the movable mold 3 and the ejector pin plate 101, the ejector pin assembly 10 moves backward relative to the fixed mold core 1 under the driving of the injection molding machine, and thus, the ejector.

As shown in fig. 1, the top wall plate 91 of the meter box cover 9 of the embodiment of the present invention has a bending portion 911 extending backward and downward by bending, the longitudinal section of the bending portion 911 is L-shaped, the left side edge of the meter box cover 9 has a first barb 92 which is inverted L-shaped, the right side edge of the meter box cover 9 has a second barb 93 which is inverted L-shaped, and the first barb 92 and the second barb 93 each include a horizontal portion 90a extending forward and backward and a vertical portion 90b extending downward from the end of the horizontal portion.

In order to prevent the bending portion 911 of the meter box cover 9 from being separated in the process of demolding, in this embodiment, as shown in fig. 6, a notch 21 is formed at a position, adjacent to the movable mold 3, of the top of the movable mold core 2, a first guide post 31 which is inclined and extended upward gradually from back to front is arranged at the upper portion of the front surface of the movable mold 3, and a first guide hole 1a which is consistent with the extending direction of the first guide post 31 and in which the first guide post 31 is arranged in a front-back sliding manner is formed at the upper portion of the rear surface of the fixed mold core 1; the first stripping block 5 is arranged above the moving die core 2, the lower part of the first stripping block 5 is partially positioned in the gap 21, and the lower part of the front surface of the first stripping block 5 is in contact with the corresponding surface of the gap 21.

As shown in fig. 12, the lower portion of the front surface of the first stripping module 5 has a flange 51 protruding upward for mating with the bent portion 911 of the box cover 9 formed in the cavity, specifically, the longitudinal section of the first stripping module 5 is in an inverted T shape, the lower edge of the front surface of the first stripping module 5 has an extension plate 53 extending forward, and the flange 51 is disposed on the upper surface of the extension plate 53. The first demolding module 5 is provided with a through hole 52 which is consistent with the extending direction of the first guide column 31 and through which the first guide column 31 penetrates, and when the movable mold 3 moves backwards relative to the fixed mold, the first demolding module 5 moves towards the notch 21 under the action of the first guide column 31 to enable the flange 51 to be separated from the bent part 911 of the meter box cover 9 in the cavity, specifically referring to fig. 3 and 6, so that in the demolding process, the bent part 911 can be separated from the limitation of the first demolding module 5 to enable the top of the meter box cover 9 to be separated and realize demolding. In order to facilitate the above-mentioned first stripping module 5 to move up and down on the moving mold 3, as shown in fig. 11, a first accommodating groove 32 for accommodating the first stripping module 5 is formed on the moving mold 3, a limiting member 33 for limiting the first stripping module 5 to move towards the direction away from the notch 21 is disposed in the first accommodating groove 32 along the width direction of the moving mold 3 and on the left and right sides of the first stripping module 5, and the first stripping module 5 is limited between the two limiting members 33 in a sliding manner.

In order to prevent the first barb 92 of the meter box cover 9 from hooking the demolding mechanism and failing to separate the left side portion of the meter box cover in the demolding process, in this embodiment, as shown in fig. 13, the second demolding module 6 is disposed on the movable mold core 2 and located on the left side of the movable mold core 2, a first groove 61 extending from front to back and downward is formed in the right side surface of the second demolding module 6, and is used for accommodating the first barb 92 on the left side of the meter box cover 9 formed in the mold cavity therein, the first groove 61 is in an inverted L shape, and a first accommodating cavity 2a for accommodating the first barb 92 is formed between the left side surface of the movable mold core 2 and the first groove 61 of the second demolding module 6. The second stripping module 6 penetrates a second through hole 62 which is gradually inclined and extended from back to front towards the right side, correspondingly, a second guide post 34 which is consistent with the extending direction of the second through hole 62 and penetrates through the second through hole 62 is convexly arranged on the front surface of the movable mold 3, a second guide hole 1b which is consistent with the extending direction of the second guide post 34 and is used for the second guide post 34 to slide back and forth is arranged on the fixed mold core 1, and under the condition that the movable mold 3 moves backwards relative to the fixed mold, the second stripping module 6 moves towards the left side under the action of the second guide post 34 to strip the first groove 61 from a first barb 92 in the stripping cavity, specifically refer to fig. 8. In this way, in the process of mold release, the first barb 92 can be disengaged from the restriction of the second demolding block 6, and the left side portion of the case lid 9 can be disengaged to realize mold release.

In order to enable the second stripping module 6 to move left and right on the movable mold 3, as shown in fig. 11, a second receiving groove 35 for receiving the second stripping module 6 is formed on the movable mold 3, a second protruding strip 63 extending along the moving direction of the second stripping block 6 is disposed on one of the upper and lower sidewalls of the second stripping module 6, in this embodiment, the second protruding strip 63 is disposed on the upper sidewall of the second stripping module 6, correspondingly, a second strip-shaped groove 351 for the second protruding strip 63 to slide therein is formed on the second receiving groove 35, and the second stripping module 6 moves left and right along the width direction of the movable mold 3 through the sliding fit of the second protruding strip 63 and the second strip-shaped groove 351.

In order to prevent the second barb 93 of the meter box cover 9 from hooking the demolding mechanism and failing to realize the separation of the right side part of the meter box cover in the demolding process, as shown in fig. 8 and 9, the third demolding module 7 is arranged on the movable die core 2 and positioned on the right side of the movable die core 2, a second groove 71 which extends from front to back and downwards and is used for accommodating the second barb 93 on the right side of the meter box cover 9 formed in the cavity is formed in the left side surface of the third demolding module 7, the second groove 71 is in an inverted L shape, and a second accommodating cavity 2b for accommodating the second barb 93 is formed between the right side surface of the movable die core 2 and the second groove 71 of the third demolding module 7; a third through hole 72 is formed through the third stripping module 7, the third through hole gradually extends from back to front in an inclined manner to the left side, correspondingly, a third guide column 36 is convexly arranged on the front surface of the movable die 3, the third guide column 36 extends in the same direction as the third through hole 72 and can penetrate through the third through hole 72, a third guide hole 1c is formed in the fixed die core 1, the third guide column 36 extends in the same direction as the third guide column 36 and can slide back and forth in the third guide hole, and in the state that the movable die 3 moves back relative to the fixed die, the third stripping module 7 moves towards the right side under the action of the third guide column 36 so that the second groove 71 is stripped from a second barb 93 in the stripping cavity.

In order to enable the third stripping module 7 to move left and right on the movable mold 3, as shown in fig. 13, a third containing groove 37 for containing the third stripping module 7 is formed on the movable mold 3, a third protruding strip 73 extending along the moving direction of the third stripping module 7 is disposed on one of the upper and lower sidewalls of the third stripping module 7, in this embodiment, the third protruding strip 37 is disposed on the lower sidewall of the third stripping module 7, correspondingly, a third strip-shaped groove 371 for the third protruding strip 37 to slide therein is formed on the third containing groove 37, and the third stripping module 7 moves left and right along the width direction of the movable mold 3 through the sliding fit of the third protruding strip 73 and the third strip-shaped groove 371.

Directional terms such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Since the embodiments disclosed in this embodiment can be arranged in different directions, these directional terms are for illustration purposes only and should not be construed as limiting, for example, "up" and "down" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims (10)

1. A demoulding mechanism for table case lid, its characterized in that includes

The upper part of the rear surface of the fixed die core (1) is provided with a first guide hole (1a) which gradually inclines upwards and extends from the back to the front;

the movable mould (3) is arranged behind the fixed mould core (1) and can move back and forth relative to the fixed mould core (1), and a first guide column (31) which is consistent with the extending direction of the first guide hole (1a) and can be inserted into the first guide hole (1a) to move back and forth is arranged on the front surface of the movable mould (3) facing the fixed mould core (1);

the movable mould core (2) is arranged between the movable mould (3) and the fixed mould core (1), is relatively fixed with the movable mould (3), is positioned below the first guide column (31), is provided with a notch (21) at the top of the movable mould core (2) at a position adjacent to the movable mould (3), and forms a cavity for injection molding of a meter box cover (9) with the fixed mould core;

the first demoulding block (5) is arranged on the movable mould (3) and positioned above the movable mould core (2), the lower part of the first demoulding block (5) is partially positioned in the notch (21), and the lower part of the front surface of the first demoulding block (5) is provided with a flange (51) which protrudes upwards and is used for being matched with a bending part (911) of a top wall plate of a box cover (9) formed in a cavity in an inserting manner; and a first through hole (52) which is consistent with the extending direction of the first guide column (31) and is used for the first guide column (31) to penetrate out is formed in the first demoulding piece (5) in a penetrating way, and the demoulding piece moves towards the inside of the notch (21) under the action of the first guide column (31) under the condition that the movable mould (3) moves backwards relative to the fixed mould so as to enable the flange (51) to be separated from the top wall plate (91) of the box cover (9) in the cavity.

2. The mold-releasing mechanism according to claim 1, characterized in that: the lower edge of the front surface of the first stripper part (5) is provided with an extension plate (53) extending forwards, and the flange (51) is arranged on the upper surface of the extension plate (53).

3. The mold-releasing mechanism according to claim 1, characterized in that: the movable mould (3) is provided with a first accommodating groove (32) for accommodating the first demoulding body (5), the first accommodating groove (32) is internally provided with a limiting part for limiting the first demoulding body (5) towards the direction away from the gap (21) along the width direction of the movable mould (3) and is positioned at the left side and the right side of the first demoulding body (5), and the first demoulding body (5) is limited between the limiting parts (33) in a sliding manner.

4. The demolding mechanism according to any one of claims 1 to 3, characterized in that: the mold comprises a movable mold core (2) and a second demolding module (6) which is arranged on the movable mold core (2) and is positioned on the left side of the movable mold core (2), wherein a first groove (61) which extends from front to back and downwards and is used for accommodating a first barb (92) on the left side of a case cover (9) formed in a cavity is formed in the right side surface of the second demolding module (6), and the first groove (61) is in an inverted L shape; the second demoulding block (6) penetrates through a second through hole (62) which is obliquely extended from back to front gradually towards the right side, correspondingly, a second guide column (34) which is consistent with the extension direction of the second through hole (62) and penetrates through the second through hole (62) is convexly arranged on the front surface of the movable mould (3), a second guide hole (1b) which is consistent with the extension direction of the second guide column (34) and is used for the second guide column (34) to slide forwards and backwards is arranged on the fixed mould core (1), and under the condition that the movable mould (3) moves backwards relative to the fixed mould, the second demoulding block (6) moves towards the left side under the action of the second guide column (34) so that the first groove (61) is separated from the first barb (92) in the mould cavity.

5. The ejector mechanism of claim 4, wherein: a first accommodating cavity (2a) for accommodating a first barb (92) is formed between the left side surface of the movable die core (2) and the first groove (61) of the second demoulding piece (6).

6. The ejector mechanism of claim 4, wherein: and a second accommodating groove (35) for accommodating the second demoulding piece (6) is formed in the movable mould (3), and the second demoulding piece (6) moves left and right along the width direction of the movable mould (3).

7. The ejector mechanism of claim 4, wherein: the mold comprises a movable mold core (2) and a third demolding module (7) which is arranged on the movable mold core (2) and is positioned on the right side of the movable mold core (2), wherein a second groove (71) which extends from front to back and downwards and is used for accommodating a second barb (93) on the right side of a case cover (9) formed in a mold cavity is formed in the left side surface of the third demolding module (7), and the second groove (71) is in an inverted L shape; a third through hole (72) which gradually extends leftwards and obliquely from back to front penetrates through the third demoulding block (7), correspondingly, a third guide column (36) which is consistent with the extending direction of the third through hole (72) and can penetrate through the third through hole (72) is arranged on the front surface of the movable mould (3) in a protruding mode, a third guide hole (1c) which is consistent with the extending direction of the third guide column (36) and is used for the third guide column (36) to slide forwards and backwards is formed in the fixed mould core (1), and in the state that the movable mould (3) moves backwards relative to the fixed mould, the third demoulding block (7) moves towards the right side under the action of the third guide column (36) so that the second groove (71) is separated from a second barb (93) in the mould cavity.

8. The ejector mechanism of claim 7, wherein: and a second accommodating cavity (2b) for accommodating a second barb (93) is formed between the right side surface of the movable die core (2) and the second groove (71) of the third demoulding block (7).

9. The ejector mechanism of claim 7, wherein: and a third accommodating groove (37) for accommodating the third demoulding piece (7) is formed in the movable mould (3), and the third demoulding piece (7) moves left and right along the width direction of the movable mould (3).

10. The ejector mechanism of claim 7, wherein: the rear surface of the movable mold (3) is provided with a thimble assembly (10) connected with a power output end of the injection molding machine, and the thimble assembly (10) moves backwards relative to the fixed mold core (1) under the driving of the injection molding machine.

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