CN218196741U - Secondary die sinking complementary unit and injection mold - Google Patents

Abstract

The utility model relates to an injection mold technical field especially relates to a secondary die sinking complementary unit, include: push pedal, shifting block and fixing base. The push plate is provided with an elastic block which is arranged in a sliding mode and a first elastic piece which is connected with the elastic block. One end of the shifting block is provided with a first connecting part used for connecting the rear template, and the other end of the shifting block is provided with a driving part. A clearance groove for the sliding of the elastic block is arranged between the first connecting part and the driving part. One end of the fixing seat is provided with a second connecting part used for connecting the ejector plate, and the other end of the fixing seat is provided with a lifting part. The lifting part is positioned on one side of the elastic block departing from the driving part. The application also provides an injection mold. The auxiliary mechanism for realizing secondary die sinking is formed by the push plate with the elastic block, the shifting block and the fixing seat, driving force is obtained from the ejector plate, so that ordered secondary die sinking can be realized for products, controllability is strong, the die sinking sequence and smoothness of the die are guaranteed, the second group of ejector mechanisms are not required to be arranged, the influence on the whole thickness of the die is small, and the die blank cost is low.

Description

Secondary die sinking complementary unit and injection mold

Technical Field

The utility model relates to an injection mold technical field especially relates to a secondary die sinking complementary unit to and an injection mold including this secondary die sinking complementary unit.

Background

Injection molds are an efficient product forming tool. During production, liquid raw materials are injected into a forming cavity of an injection mold through an injection machine, then the raw materials are solidified and formed in the forming cavity, and demolding is carried out on the product from the injection mold after the product is cooled and shaped. Based on the working principle, the structure of the injection mold needs to be adjusted according to the specific shape and structure of the product. For some products with complex structures (for example, a plurality of buckling positions and/or chamfer structures with different positions are arranged), secondary mold opening is often required to be designed. The product can not be demoulded only by once mould opening, and two mould opening operations are required in order.

To achieve the second opening (e.g., first removing the back mold insert and then separating the other molded structures from the product), the following design is mostly used for the conventional injection mold:

the first design is as follows: a spring or a high-strength rubber is arranged in the mold to assist in springing open a molding block (such as a rear mold insert) of the first mold opening, and then the molding block is ejected out through a return pin to realize the second mold opening. The defect is that the acting force of the spring and the high-strength rubber is limited, the controllability is poor, and the die opening sequence and the smoothness are difficult to ensure.

The second design is as follows: a set of ejector plates is additionally arranged in the mold (a set of ejector plates is usually arranged in the injection mold for ejecting the product to realize demolding) so as to realize secondary ejection, thereby realizing secondary mold opening. This has the disadvantage of requiring space for the second set of ejector plates, which increases the overall thickness of the mould and the cost of the mould blank.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a secondary die sinking complementary unit utilizes push pedal, shifting block and the fixing base that has the bullet piece to constitute the complementary unit who realizes the secondary die sinking, acquires drive power from the kicking plate for the product can realize orderly secondary die sinking, and the controllability is strong, guarantees the die sinking order and the smooth and easy nature of mould. Meanwhile, a second group of material ejecting mechanisms are not required to be arranged, the influence on the whole thickness of the die is small, and the die blank cost is low.

A secondary mold opening assisting mechanism includes:

pushing the plate; the outer side of the push plate is provided with a spring block which is arranged in a sliding way and a first elastic part which is connected with the spring block; the first elastic piece is used for ejecting the elastic block out of the push plate; the push plate is provided with a mounting groove and a movable channel communicated with the mounting groove; the mounting groove is used for accommodating the rear mold core; the movable channel is used for sliding the rear mold insert and the thimble;

the shifting block is positioned on the outer side of the push plate; the extending direction of the shifting block is vertical to the sliding direction of the elastic block; one end of the shifting block is provided with a first connecting part for connecting the rear template, and the other end of the shifting block is provided with a driving part; a clearance groove for the elastic block to slide is arranged between the first connecting part and the driving part; the driving part is used for pushing the elastic block to retract towards the inner side of the push plate; and

a fixed seat connected with the shifting block in a sliding way; the extending direction of the fixed seat is vertical to the sliding direction of the elastic block; one end of the fixed seat is provided with a second connecting part for connecting the ejector plate, and the other end of the fixed seat is provided with a lifting part; the lifting part is positioned on one side of the elastic block departing from the driving part.

Above-mentioned secondary die sinking complementary unit, after injection mold's front shroud and back template die sinking, along with the action of liftout plate, the fixing base is followed the liftout plate and is removed toward the push pedal together. At the moment, the lifting part of the fixed seat and the elastic block extending out of the outer side of the push plate keep in a butt joint state, and the fixed seat pushes the push plate to synchronously act through the elastic block. And then the rear mould core is driven by the push plate to lift relative to the rear mould insert, so that the formed product is separated from the rear mould core and the rear mould insert, and the first mould opening is completed. Then, along with the continuous action of the ejector plate, the elastic block is contacted with the driving part of the shifting block, the elastic block is pressed by the driving part to retract into the push plate, at the moment, the push plate loses the thrust of the fixed seat and does not move any more, therefore, along with the further action of the ejector plate, the ejector pin can eject the product out of the rear mold core, and the second mold opening is completed. Through the design, the push plate with the elastic block, the shifting block and the fixing seat form an auxiliary mechanism for realizing secondary die opening, and driving force is obtained from the ejector plate, so that ordered secondary die opening can be realized for products, controllability is high, and the die opening sequence and smoothness of the die are guaranteed. Meanwhile, a second group of material ejecting mechanisms are not required to be arranged, the influence on the whole thickness of the die is small, and the cost of the die blank is low.

In one embodiment, the spring block is provided with a first wedge surface; the driving part is provided with a second wedge surface matched with the first wedge surface. The first wedge surface and the second wedge surface can reduce the resistance when the elastic block contacts with the driving part, so that the driving part can smoothly push the elastic block back to the inner side of the push plate.

In one embodiment, the fixed seat is provided with a sliding groove which is connected with the shifting block in a sliding way. By utilizing the sliding connection of the sliding groove and the shifting block, the motion track of the fixing seat can be guided by means of the shifting block, and the precision and the stability of the action of the fixing seat are improved.

In one embodiment, the push plate is also provided with an inner guide post which is arranged on the elastic block in a penetrating way; the inner guide post is arranged along the sliding direction of the elastic block. The inner guide post can guide the motion track of the elastic block, and the precision and the stability of the movement of the elastic block are improved.

In one embodiment, the first elastic element is a spring sleeved on the inner guide post. The spring is low in cost, convenient to install, capable of being stably installed by means of the inner guide pillar and high in reliability.

Simultaneously, this application still provides an injection mold.

An injection mold comprising: the secondary mold opening assisting mechanism of any of the above embodiments.

Above-mentioned injection mold, it has secondary die sinking complementary unit, utilizes push pedal, shifting block and the fixing base that has the bullet piece to constitute the complementary unit who realizes the secondary die sinking, acquires drive power from the ejector plate for the product can realize orderly secondary die sinking, and the controllability is strong, guarantees the die sinking order and the smooth and easy nature of mould. Meanwhile, a second group of material ejecting mechanisms are not required to be arranged, the influence on the whole thickness of the die is small, and the cost of the die blank is low.

In one embodiment, the injection mold further comprises: a front mold assembly and a rear mold assembly; the secondary die opening auxiliary mechanism is arranged on the rear die assembly; the front mold assembly includes: the front mold comprises a panel, a stripper plate, a front template and a front mold core; the panel, the stripper plate and the front template are sequentially arranged in parallel; the front mold core is arranged on the front template; the rear mold assembly includes: the mould comprises a bottom plate, a rear template, a rear mould core, a rear mould insert, a mould foot and a material ejecting mechanism; the bottom plate, the rear template and the push plate are sequentially arranged in parallel; the shifting block is arranged on the outer side of the rear template; the rear mold core is arranged on the push plate and is opposite to the front mold core; the rear mold insert is arranged on the rear template and sequentially penetrates through the push plate and the rear mold core along the movable channel; the mould leg is positioned between the bottom plate and the rear mould plate to erect an accommodating groove for accommodating the material ejecting mechanism; liftout mechanism includes: the ejector plate is positioned in the accommodating groove and the ejector pin is arranged on the ejector plate; the thimble penetrates through the rear template and is arranged on the rear mold insert in a penetrating manner; the fixing seat is installed on the outer side of the ejector plate. When the mould is in work, after the front mould plate drives the front mould core and the rear mould core to be opened, the ejector plate of the ejector mechanism is utilized to drive the fixing seat to move, so that a product is guided to realize secondary mould opening, and the mould is simple in structure, stable and reliable.

In one embodiment, the rear mold assembly further comprises: a back needle connected between the ejector plate and the push plate and a meson arranged at one end of the back needle close to the push plate. When the ejector plate resets, the ejector plate is pulled back to the reset position through the return needle and the meson, the structure is simple, and the working efficiency is high.

In one embodiment, the liftout mechanism further comprises: and the second elastic piece is connected between the ejector plate and the rear template. The second elastic part can provide the driving force required for resetting for the ejector plate, so that the ejector plate can reset automatically after the product is demoulded.

Drawings

Fig. 1 is a perspective view of a secondary mold opening assisting mechanism according to an embodiment of the present invention;

fig. 2 is a partial half sectional view of the secondary mold opening assisting mechanism shown in fig. 1;

FIG. 3 is a view of the secondary mold opening assisting mechanism shown in FIG. 1 with a push plate hidden;

fig. 4 is a view from another perspective of the secondary mold opening assisting mechanism shown in fig. 3;

FIG. 5 is a schematic diagram of the secondary mold opening assisting mechanism shown in FIG. 1;

fig. 6 is a perspective view of an injection mold according to an embodiment of the present invention;

FIG. 7 is a front view of the injection mold shown in FIG. 6;

FIG. 8 isbase:Sub>A sectional view A-A of the injection mold of FIG. 7;

FIG. 9 is a sectional view B-B of the injection mold shown in FIG. 7;

fig. 10 is a partial view of the injection mold shown in fig. 6.

The meaning of the reference symbols in the drawings is:

100-injection molding;

10-secondary die opening auxiliary mechanism, 11-push plate, 111-elastic block, 1111-first wedge surface, 112-first elastic piece, 113-installation groove, 114-movable channel, 115-inner guide post, 12-shifting block, 121-first connecting part, 122-driving part, 1221-second wedge surface, 123-clearance groove, 13-fixed seat, 131-second connecting part, 132-lifting part and 133-sliding groove;

20-front mould assembly, 21-panel, 22-stripper plate, 23-front mould plate and 24-front mould core;

30-rear mould assembly, 31-bottom plate, 32-rear mould plate, 33-rear mould core, 34-rear mould insert, 35-mould foot, 36-material ejecting mechanism, 361-material ejecting plate, 362-thimble, 363-second elastic piece, 37-return pin and 38-meson.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

As shown in fig. 1 to 5, it is a secondary mold opening assisting mechanism 10 according to an embodiment of the present invention.

As shown in fig. 1, the secondary mold opening assisting mechanism 10 includes: the push plate device comprises a push plate 11, a shifting block 12 positioned at the outer side of the push plate 11 and a fixed seat 13 connected with the shifting block 12 in a sliding way. The push plate 11 is used for being installed between the rear template and the rear mold core and carrying the rear mold core. The fixed seat 13 is used for connecting the ejector plate to obtain driving force and driving the push plate 11 to move. The shifting block 12 is used for being installed on the outer side of the rear mold plate and for switching the working state of the push plate 11 (changing the connection relationship or the relative position between the push plate 11 and the fixed seat 13) according to the sequence of mold opening.

The secondary mold opening assisting mechanism 10 will be described below with reference to fig. 1 to 5.

As shown in fig. 1 and 2, the push plate 11 is provided at an outer side thereof with a spring block 111 slidably disposed and a first elastic member 112 connecting the spring block 111. The first elastic member 112 is used for ejecting the elastic block 111 to the outer side of the push plate 11. As shown in fig. 2, the push plate 11 is provided with a mounting groove 113 and a movable passage 114 communicating with the mounting groove 113. The mounting groove 113 is used for accommodating a rear mold core of the injection mold, and the movable channel 114 is used for sliding a rear mold insert and a thimble of the injection mold.

In order to make the motion track of the elastic block 111 more accurate and stable, as shown in fig. 3 and 4, in this embodiment, the push plate 11 is further provided with an inner guide post 115 penetrating through the elastic block 111. The inner guide post 115 is disposed along the sliding direction of the spring block 111. The inner guide post 115 can guide the motion track of the elastic block 111, and the precision and the stability of the motion of the elastic block 111 are improved.

Further, as shown in fig. 3, the first elastic member 112 may be a spring sleeved on the inner guide post 115. The spring is low in cost, convenient to install, capable of being stably installed by means of the inner guide post 115, and high in reliability.

It should be noted that, in other embodiments, the first elastic member 112 may also be a gas spring.

As shown in fig. 2, the extending direction of the pusher 12 is perpendicular to the sliding direction of the bullet 111. As shown in fig. 2 and 3, one end of the shift block 12 is provided with a first connecting part 121 for connecting the rear mold plate, and the other end of the shift block 12 is provided with a driving part 122. A clearance groove 123 for the elastic block 111 to slide is provided between the first connecting portion 121 and the driving portion 122. The driving portion 122 is used for pushing the elastic block 111 to retract towards the inner side of the push plate 11.

When the spring block 111 transitions from the clearance groove 123 to the driving portion 122, there is a contact point between the spring block 111 and the driving portion 122 so that the spring block 111 and the driving portion 122 can smoothly abut against each other. As shown in fig. 2, in the present embodiment, the spring block 111 is provided with a first cammed surface 1111. The driving part 122 is provided with a second cammed surface 1221 matching the first cammed surface 1111. The first wedge surface 1111 and the second wedge surface 1221 may reduce resistance when the spring block 111 contacts the driving portion 122, so that the driving portion 122 may smoothly push the spring block 111 back to the inner side of the push plate 11. In other embodiments, a curved surface structure may be disposed between the elastic block 111 and the driving portion 122 for transition.

As shown in fig. 2, the extending direction of the fixed base 13 is perpendicular to the sliding direction of the elastic block 111. As shown in fig. 3 and 4, one end of the fixed base 13 is provided with a second connecting portion 131 for connecting the ejector plate, and the other end of the fixed base 13 is provided with a lifting portion 132. The lifting portion 132 is located on a side of the spring block 111 facing away from the driving portion 122.

In order to stabilize the movement of the fixing base 13, as shown in fig. 3, in this embodiment, the fixing base 13 may further be provided with a sliding slot 133 slidably connected to the shifting block 12. By utilizing the sliding connection between the sliding groove 133 and the shifting block 12, the motion track of the fixed seat 13 can be guided by the shifting block 12, and the precision and the stability of the motion of the fixed seat 13 are improved.

With reference to fig. 5, the following brief description is made on the working principle of the present solution:

after the front mold plate 23 and the rear mold plate 32 of the injection mold are opened, the fixed seat 13 moves toward the push plate 11 along with the ejector plate 361 along with the movement of the ejector plate 361. At this time, the lifting portion 132 of the fixed seat 13 is kept in contact with the elastic block 111 extending to the outer side of the push plate 11, and the fixed seat 13 pushes the push plate 11 to move synchronously by the elastic block 111. And the rear mold core 33 is driven by the push plate 11 to lift relative to the rear mold insert 34 (the rear mold core 33 is mounted on the push plate 11 to move synchronously along with the push plate 11, and the rear mold insert 34 is mounted on the rear mold plate 32 to keep static), so that the molded product is separated from the rear mold core 33 and the rear mold insert 34, and the first mold opening is completed.

Then, as the ejector plate 361 continues to move, the elastic block 111 contacts the driving portion 122 of the shifting block 12, the elastic block 111 is pressed by the driving portion 122 to retract into the push plate 11, and the elastic block 111 retracts, so that the fixed seat 13 cannot drive the push plate 11 to move through the lifting portion 132 and the elastic block 111. At this time, the pushing plate 11 loses the pushing force of the fixing seat 13 and does not move any more, and the pushing plate 11 enters a static state (a pull rod or an equal-height screw may be arranged between the rear mold plate 32 and the pushing plate 11 to limit the maximum stroke of the pushing plate 11, so as to ensure that the pushing plate 11 is not driven to move when a subsequent product is ejected by the thimble 362). Therefore, with further movement of the ejector plate 361, the ejector pins 362 will eject the product out of the rear mold core 33, completing the second mold opening.

The secondary die opening auxiliary mechanism 10 uses the push plate 11 with the elastic block 111, the shifting block 12 and the fixed seat 13 to form an auxiliary mechanism for realizing secondary die opening, obtains driving force from the ejector plate, enables products to realize ordered secondary die opening, is strong in controllability, and ensures the die opening sequence and smoothness of the die. Meanwhile, a second group of material ejecting mechanisms are not required to be arranged, the influence on the whole thickness of the die is small, and the cost of the die blank is low.

As shown in fig. 6 to 10, it is an injection mold 100 according to an embodiment of the present invention.

This injection mold 100 includes: the secondary mold opening assisting mechanism 10 of the above embodiment. The injection mold 100 is provided with the secondary mold opening auxiliary mechanism 10, the push plate 11 with the elastic block 111, the shifting block 12 and the fixing seat 13 form the auxiliary mechanism for realizing secondary mold opening, and the driving force is obtained from the ejector plate 361, so that the product can realize ordered secondary mold opening, the controllability is strong, and the mold opening sequence and the smoothness of the mold are ensured. Meanwhile, the second group of material ejecting mechanisms 36 are not required to be arranged, the influence on the whole thickness of the die is small, and the die blank cost is low.

Referring to fig. 6 to 10, an embodiment of an injection mold 100 including the secondary mold opening assisting mechanism 10 is shown.

As shown in fig. 6 and 7, the injection mold 100 further includes: a front mold assembly 20 and a rear mold assembly 30. The secondary mold opening assist mechanism 10 is mounted on the rear mold assembly 30.

As shown in fig. 8, the front mold assembly 20 includes: a face plate 21, a stripper plate 22, a front mold plate 23, and a front mold core 24. The face plate 21, the stripper plate 22, and the front mold plate 23 are arranged in parallel in this order. The front core 24 is mounted on the front mold plate 23.

As shown in fig. 8 and 10 in conjunction, the rear mold assembly 30 includes: the die comprises a bottom plate 31, a rear die plate 32, a rear die core 33, a rear die insert 34, a die leg 35 and an ejecting mechanism 36. The bottom plate 31, the rear mold plate 32, and the push plate 11 are arranged in parallel in this order. The paddle 12 is mounted on the outside of the rear platen 32. The rear mold core 33 is installed on the push plate 11 and is disposed opposite to the front mold core 24. The rear mold insert 34 is mounted on the rear mold plate 32, and the rear mold insert 34 passes through the push plate 11 and the rear mold core 33 along the moving channel 114 in sequence. The mold leg 35 is located between the bottom plate 31 and the rear mold plate 32 to form a receiving groove for receiving the ejector mechanism 36. The ejector mechanism 36 includes: an ejector plate 361 positioned in the containing groove and an ejector pin 362 arranged on the ejector plate 361. A thimble 362 extends through the back mold plate 32 and through the back mold insert 34. The fixed seat 13 is installed at the outer side of the ejector plate 361.

When the mold opening device works, after the front template 23 drives the front mold core 24 and the rear mold core 33 to open the mold, the ejector plate 361 of the ejector mechanism 36 drives the fixing seat 13 to move, so that a product is guided to realize secondary mold opening, and the mold opening device is simple in structure, stable and reliable.

In order to allow the push plate 11 to be reset after the demolding operation is completed, as shown in fig. 9, the rear mold assembly 30 may further include: a return needle 37 connected between the ejector plate 361 and the push plate 11 and a meson 38 installed at one end of the return needle 37 near the push plate 11. When the ejector plate 361 is reset, the ejector plate 11 is pulled back to the reset position through the return needle 37 and the meson 38, the structure is simple, and the working efficiency is high.

As shown in fig. 9, the ejector mechanism 36 may further include: and a second elastic member 363 connected between the ejector plate 361 and the rear mold plate 32. The second elastic member 363 may provide a driving force for the ejector plate 361 to reset, so that the ejector plate 361 resets itself after the product is demolded. In this embodiment, the second elastic member 363 is a spring disposed between the ejector plate 361 and the rear mold plate 32.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (9)

1. The utility model provides a secondary die sinking complementary unit which characterized in that includes:

pushing the plate; the outer side of the push plate is provided with a spring block which is arranged in a sliding manner and a first elastic piece which is connected with the spring block; the first elastic piece is used for ejecting the elastic block to the outer side of the push plate; the push plate is provided with a mounting groove and a movable channel communicated with the mounting groove; the mounting groove is used for accommodating the rear mold core; the movable channel is used for sliding the rear mold insert and the thimble;

the shifting block is positioned on the outer side of the push plate; the extending direction of the shifting block is vertical to the sliding direction of the elastic block; one end of the shifting block is provided with a first connecting part for connecting a rear template, and the other end of the shifting block is provided with a driving part; a clearance groove for the elastic block to slide is arranged between the first connecting part and the driving part; the driving part is used for pushing the elastic block to retract towards the inner side of the push plate; and

the fixed seat is connected with the shifting block in a sliding manner; the extending direction of the fixed seat is vertical to the sliding direction of the elastic block; one end of the fixed seat is provided with a second connecting part for connecting the ejector plate, and the other end of the fixed seat is provided with a lifting part; the lifting part is positioned on one side of the elastic block departing from the driving part.

2. The secondary mold opening assisting mechanism according to claim 1, wherein the elastic block is provided with a first wedge surface; the driving part is provided with a second wedge surface matched with the first wedge surface.

3. The secondary mold opening assisting mechanism according to claim 1, wherein the fixing seat is provided with a sliding groove in sliding connection with the shifting block.

4. The secondary die sinking auxiliary mechanism of claim 1, wherein the push plate is further provided with an inner guide post penetrating through the spring block; the inner guide post is arranged along the sliding direction of the elastic block.

5. The secondary mold opening assisting mechanism according to claim 4, wherein the first elastic member is a spring sleeved on the inner guide post.

6. An injection mold, comprising: the secondary mold opening assisting mechanism according to any one of claims 1 to 5.

7. The injection mold of claim 6, further comprising: a front mold assembly and a rear mold assembly; the secondary die opening auxiliary mechanism is arranged on the rear die assembly;

the front mold assembly comprises: the front mold comprises a panel, a stripper plate, a front template and a front mold core; the panel, the stripper plate and the front template are sequentially arranged in parallel; the front mold core is arranged on the front template;

the rear mold assembly includes: the mould comprises a bottom plate, a rear template, a rear mould core, a rear mould insert, a mould foot and a material ejecting mechanism; the bottom plate, the rear template and the push plate are sequentially arranged in parallel; the shifting block is arranged on the outer side of the rear template; the rear die core is arranged on the push plate and is opposite to the front die core; the rear mold insert is arranged on the rear template and sequentially penetrates through the push plate and the rear mold core along the movable channel; the die feet are positioned between the bottom plate and the rear die plate to erect an accommodating groove for accommodating the material ejecting mechanism; the liftout mechanism includes: the ejector plate is positioned in the accommodating groove, and the ejector pin is installed on the ejector plate; the ejector pin penetrates through the rear template and penetrates through the rear mold insert; the fixing seat is installed on the outer side of the ejector plate.

8. An injection mold in accordance with claim 7 wherein said rear mold assembly further comprises: the device comprises a return needle connected between the ejector plate and the push plate and a meson installed at one end of the return needle close to the push plate.

9. An injection mold as claimed in claim 7, wherein said ejector mechanism further comprises: and the second elastic piece is connected between the ejector plate and the rear template.

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