CN219522922U - Secondary ejection die structure - Google Patents
Secondary ejection die structure Download PDFInfo
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- CN219522922U CN219522922U CN202223099665.1U CN202223099665U CN219522922U CN 219522922 U CN219522922 U CN 219522922U CN 202223099665 U CN202223099665 U CN 202223099665U CN 219522922 U CN219522922 U CN 219522922U
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Abstract
The utility model relates to a secondary ejection die structure which comprises a movable die assembly and a fixed die assembly, wherein the movable die assembly comprises a fixed plate, an ejector pin plate and a movable die plate; a movable mould forming cavity is arranged on the movable mould plate; the ejector plate is provided with a first ejector mechanism and a second ejector mechanism; the first ejection mechanism comprises a plurality of first ejector pins, and positioning rings are arranged at the tail ends of the first ejector pins; the second ejection mechanism comprises a driving block, a second ejector pin, a reset seat and a limiting piece, the middle part of the driving block is hinged with the ejector pin plate, the second ejector pin is arranged at the connecting end of the driving block, the limiting piece is positioned at the driving end of the driving block, the reset seat is arranged on the fixed plate, and the limiting piece is arranged on the movable mould plate or the ejector pin plate; the cavity bottom of the movable mould forming cavity is provided with the through hole A penetrated by the first ejector pin, and the through hole B penetrated by the second ejector pin.
Description
Technical Field
The utility model relates to the technical field of injection molding dies, in particular to a secondary ejection die structure.
Background
With the increasing variety of product types, product models with equal moving and fixed die parting appear, and the products with equal moving and fixed die parting refer to that the areas and depths of the glue positions of the products are equal when the dies are parting. For the product models with equal moving and fixed mould parting, a product sticking mould is easy to appear when the mould is opened. If the product is not taken out manually in time, the die is closed, and the product and the die are crushed due to the fact that the product is not taken out. Therefore, the molds developed for this type of product result in failure to be produced automatically.
In order to realize secondary ejection, a whole ejection system is needed to be added on the original basis, two pairs of ejector plates are needed, the structure is complex, and the die cost is high.
Disclosure of Invention
The utility model aims at overcoming the problems or at least partially solving the problems, and provides a secondary ejection die structure, wherein a first ejection ejects a product out of a die cavity from a first ejector pin, so that the product is prevented from sticking to the die during die opening, and a second ejection ejects the product stuck on the first ejector pin from a second ejector pin, thereby realizing the die stripping of the product.
The utility model solves the technical problems by adopting the technical scheme that the utility model provides a secondary ejection die structure which comprises a movable die assembly and a fixed die assembly, wherein the movable die assembly is driven by a driving piece to move;
the movable die assembly comprises a fixed plate, an ejector pin plate and a movable die plate which are sequentially arranged, the movable die plate is fixedly connected with the fixed plate, and the ejector pin plate is arranged between the fixed plate and the movable die plate in a sliding manner;
a movable mould forming cavity is arranged on the side surface of the movable mould plate, which is away from the fixed plate;
the ejector plate is provided with a first ejection mechanism and a second ejection mechanism;
the first ejection mechanism comprises a plurality of first ejector pins, and positioning rings are arranged at the tail ends of the first ejector pins;
the second ejection mechanism comprises a driving block, a second ejector pin, a reset seat and a limiting piece, wherein the middle part of the driving block is hinged with the ejector pin plate, the second ejector pin is arranged at the connecting end of the driving block, the limiting piece is positioned at the driving end of the driving block, the reset seat is arranged on the fixed plate, and the limiting piece is arranged on the movable mould plate or the ejector pin plate;
the cavity bottom of the movable mold forming cavity is provided with a plurality of through holes A, the first ejector pins penetrate through the through holes A, and the first ejector pins are arranged in one-to-one correspondence with the through holes A;
the cavity bottom of the movable mold forming cavity is provided with a through hole B, and the second ejector pin penetrates through the through hole B.
Further, the ejector pin plate mechanism further comprises an ejector power piece used for driving the ejector pin plate to move, and the ejector power piece drives the ejector pin plate to move along the axial direction of the first ejector pin.
Further, the ejection power piece is an injection molding machine top roller, and the fixing plate is provided with a yielding hole for the injection molding machine top roller to pass through.
Further, a reset rod is arranged on the ejector plate, and penetrates through the movable template.
Further, the fixed plate is connected with the movable template through a guide post, and the thimble plate is sleeved on the guide post.
Further, the positioning ring is a ring-shaped notch arranged on the periphery of the top end of the first ejector pin, a convex part is coaxially arranged on the top end of the first ejector pin, and a ring-shaped notch is formed between the periphery of the convex part and the periphery of the top end of the first ejector pin.
Further, a clamping groove for installing the second thimble is formed in the driving end of the driving piece.
Further, the limiting piece is a limiting needle, the ejector plate is provided with a fixing seat, the fixing seat is provided with a notch capable of accommodating the driving end of the driving block, and the limiting needle is sleeved in the notch.
Further, the ejector plate is provided with a mounting hole, the driving block is hinged in the mounting hole through a shaft rod, and the fixing seat is arranged at the end, far away from the fixing plate, in the mounting hole.
Compared with the prior art, the utility model has the following beneficial effects:
a positioning ring is arranged at the top end of the first ejector pin, and the product is coated on the top end of the first ejector pin after injection molding, so that the adhesive force of the movable die is increased, and the product is prevented from adhering to the die during die opening;
the first ejection ejects the product out of the die cavity by the first ejector pin, and the second ejection ejects the product stuck on the first ejector pin by the second ejector pin, so that the demolding of the product is realized, the automatic production is facilitated, and the working efficiency is improved;
the quick secondary ejection can be completed only by a pair of ejector plates, and the primary ejection structure and the secondary ejection structure are all processed on the ejector plates, so that hole digging and iron reduction are not needed on the movable mould plate, and the processing amount and the later maintenance workload can be reduced;
the structure can avoid damaging products and dies during compression molding, does not need to manually take the products, and improves the production efficiency.
Drawings
The patent of the utility model is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a mold clamping state.
Fig. 2 is a schematic diagram of the primary ejection after the mold is opened.
Fig. 3 is a schematic diagram of the mold after opening the mold for the second ejection.
Fig. 4 is a schematic view of the arrangement positions of the first ejection mechanism and the second ejection mechanism.
Fig. 5 is a schematic structural view of a second ejection mechanism.
Fig. 6 is an exploded view of the structure of the second ejector mechanism.
FIG. 7 is a schematic view of the structure of the end of the first thimble.
In the figure:
1-a product; 2-a fixed die assembly; 3-moving templates; 4-moving mold inserts; 5-a fixing plate; 6-ejecting needle plates; 7-a first thimble; 8-a second thimble; 9-a driving block; 10-resetting the seat; 11-a fixed seat; 12-limiting parts; 13-a reset lever; 14-an injection molding machine top roller; 15-guide posts; 16-bottom needle plate; 17-face needle plate; 18-positioning rings; 19-a protrusion; 20-shaft lever.
Detailed Description
The preferred embodiments of the present utility model will be described in more detail below, however, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The products with equal moving and fixed die parting means that the areas and depths of the glue positions of the moving and fixed dies are equal when the dies are parting. For the product models with equal moving and fixed mould parting, a product sticking mould is easy to appear when the mould is opened. If the product is not taken out manually in time, the die is closed, and the product and the die are crushed due to the fact that the product is not taken out. Therefore, the molds developed for this type of product result in failure to be produced automatically.
Example 1:
to solve the above problems, embodiment 1 provides a secondary ejection mold structure, in which a first ejector pin 7 ejects a product 1 out of a mold cavity, so that the product 1 is prevented from adhering to the mold during mold opening, and a second ejector pin 8 ejects the product 1 adhered to the first ejector pin, so that demolding of the product 1 is realized, automatic production is facilitated, and working efficiency is improved.
As shown in fig. 1-7, a secondary ejection die structure comprises a movable die assembly and a fixed die assembly 2, wherein the movable die assembly is driven by a driving piece to move;
the movable die assembly comprises a fixed plate 5, an ejector plate 6 and a movable die plate 3 which are sequentially arranged, the movable die plate 3 is fixedly connected with the fixed plate 5, the ejector plate 6 is arranged between the fixed plate 5 and the movable die plate 3 in a sliding manner, and the ejector plate 6 is used for driving an ejector pin on the ejector plate to act;
the movable mould insert 4 is embedded in the side surface of the movable mould plate 3, which is away from the fixed plate 5, and the movable mould insert 4 is provided with a movable mould forming cavity for being matched with the fixed mould forming cavity on the fixed mould assembly 2 during mould closing to form a forming cavity in a surrounding manner so as to be beneficial to injection moulding of the product 1;
the ejector plate 6 is provided with a first ejection mechanism and a second ejection mechanism for ejecting products;
in the die assembly state, the tail end of the second thimble 8 is flush with the bottom of the movable die forming cavity, and the tail end of the second thimble 8 extends into the movable die forming cavity;
the first ejection mechanism comprises a plurality of first ejector pins 7, wherein the tail end of each first ejector pin 7 is provided with a positioning ring 18, the positioning rings 18 have the function that after the product 1 is subjected to injection molding, the product 1 is wrapped on the positioning rings 18, so that wrapping force is formed, and thus the ejector pin plate 6 drives the first ejector pins 7 to eject out of a movable mold forming cavity through the product 1, and the phenomenon that the product 1 sticks to a mold during mold opening is avoided; the tail end of the second ejector pin 8 is designed to be a plane, so that the product 1 can be conveniently separated from the first ejector pin 7 during secondary ejection;
the second ejection mechanism comprises a driving block 9, a second thimble 8, a reset seat 10 and a limiting piece 12, wherein the middle part of the driving block 9 is hinged with the thimble plate 6, the second thimble 8 is arranged at the connecting end of the driving block 9, the limiting piece 12 is positioned at the driving end of the driving block 9, the reset seat 10 is arranged on the fixed plate 5, and the limiting piece 12 is fixedly arranged on the movable mold plate 3 or the limiting piece 12 is sleeved on the thimble plate 6;
after the primary ejection is finished, the ejector plate 6 continues to move towards the fixed die set, the limiting piece 12 counteracts the driving end of the driving block 9 due to the blocking of the movable die plate 3, so that the driving block 9 swings, the connecting end of the driving block 9 drives the second ejector pin 8 to partially move towards the fixed die assembly 2, secondary ejection is carried out, and the product 1 is separated from the first ejector pin 7; the design of the second ejection mechanism ensures that the ejection stroke of the second ejector pin 8 is longer than that of the first ejector pin 7, so that the product 1 wrapped on the first ejector pin 7 can be ejected;
the cavity bottom of the movable mold forming cavity is provided with a plurality of through holes A, the first ejector pins 7 penetrate through the through holes A, and the first ejector pins 7 are arranged in one-to-one correspondence with the through holes A;
the cavity bottom of the movable mould forming cavity is provided with a through hole B, and the second thimble 8 penetrates through the through hole B.
In practical application, through holes A are arranged at each side of the bottom of the movable mould forming cavity, four through holes B are arranged and are respectively positioned at four corners of the bottom of the movable mould forming cavity, and second ejector pins 8 are arranged in one-to-one correspondence with the through holes B.
In this embodiment, the ejector mechanism further comprises an ejector power member for driving the ejector plate 6 to move, and the ejector power member drives the ejector plate 6 to move along the axial direction of the first ejector pin 7.
In this embodiment, the ejector power member is an ejector roller 14 of the injection molding machine, the fixing plate 5 is provided with a yielding hole for the ejector roller 14 of the injection molding machine to pass through, and the ejector roller 14 of the injection molding machine is attached to the ejector plate 6 and then pushed to realize movement of the ejector plate 6.
In this embodiment, the positioning ring 18 is a ring-shaped notch disposed on the peripheral side of the top end of the first thimble 7, the top end of the first thimble 7 is coaxially provided with a protrusion 19, and a ring-shaped notch is formed between the periphery of the protrusion 19 and the periphery of the top end of the first thimble 7.
This twice ejecting mould structure is through setting up holding ring 18 on first thimble 7 top, and product 1 parcel first thimble 7 top after injection moulding to increase the movable mould adhesion, product 1 glues the cover half when avoiding the die sinking.
The first ejection of the secondary ejection mould structure ejects the product 1 out of the mould cavity through the first ejector pin 7, the second ejection ejects the product 1 adhered on the first ejector pin 7 through the second ejector pin 8, so that the demoulding of the product 1 is realized, the automatic production is facilitated, and the working efficiency is improved.
The secondary ejection die structure can complete quick secondary ejection only by a pair of ejector plates 6, and the primary ejection and secondary ejection structures are all processed on the ejector plates 6 without hole digging and iron reduction on the movable die plate 3, so that the processing amount and the later maintenance workload can be reduced.
The secondary ejection die structure can avoid damaging the product 1 and the die during die pressing, does not need to manually take the product 1, and improves the production efficiency.
Example 2
As shown in fig. 4-6, embodiment 2 provides a specific structural design of the second ejection mechanism based on embodiment 1.
In this embodiment, for easy disassembly, a clamping groove for installing the second thimble 8 is provided at the driving end of the driving member.
In this embodiment, the limiting member 12 is a limiting needle, the ejector plate 6 is provided with a fixing seat 11, the fixing seat 11 is provided with a notch capable of accommodating the driving end of the driving block 9, so that the driving block can swing conveniently, the surface of the driving block 9, which is matched with the bottom of the notch groove, is an inclined surface, and the limiting needle is sleeved in the notch. After the primary ejection is completed, the limiting needle abuts against the movable template 3, during the secondary ejection, the ejector plate 6 continues to move, the limiting needle moves reversely due to the blocking of the movable template 3 and pushes the driving end of the driving block 9, the driving block 9 swings, the connecting end of the driving block 9 drives the second ejector pin 8 to partially move towards the fixed die assembly 2, the secondary ejection is performed, and the product 1 is separated from the first ejector pin 7.
In practical application, the thimble plate 6 is provided with a mounting hole, the driving block 9 is hinged in the mounting hole through the shaft lever 20, and the fixing seat 11 is arranged at the end far away from the fixing plate 5 in the mounting hole.
In practical application, in order to facilitate the disassembly and assembly of the first ejection mechanism and the second ejection mechanism, the ejector plate 6 includes a bottom needle plate 16 and a face needle plate 17 that are sequentially connected.
In practical application, for the stability of movement and the self-resetting of the second ejector pin 8 after the secondary ejection, a spring can be arranged in the notch, the spring is sleeved on the limiting pin, one end of the spring abuts against the limiting pin, and the other end abuts against the bottom of the notch.
Example 3:
example 3 based on example 1 or example 2, an injection mold release method is provided, which uses the secondary ejection mold structure of example 1 or example 2.
In this embodiment, the method for discharging the injection mold comprises the following steps:
s1: after the injection molding machine completes injection molding pressure maintaining, the mold is opened;
in the process, part of the fixed die assembly 2 is not moved, and the driving piece drives the movable die assembly to retreat to a designated position;
s2: the ejector plate 6 is driven to move towards the fixed die assembly 2 by a set distance A, and the ejector plate 6 ejects the product 1 out of the movable die forming cavity through the first ejector pin 7 and the second ejector pin 8; at the moment, the driving end of the driving block 9 abuts against the ejector pins, the product 1 is wrapped at the tail end of the first ejector pin 7, and the tail end of the second ejector pin 8 is attached to the product;
s3: the ejector pin plate 6 is driven to partially move towards the fixed die assembly 2 by a set distance B, in the moving process, the driving end of the driving block 9 is blocked by the limiting piece 12, so that the driving block 9 swings, the connecting end of the driving block 9 drives the second ejector pin 8 to partially move towards the fixed die assembly 2, and the product 1 is separated from and ejected out from the first ejector pin 7;
s4: and (3) die assembly is carried out, the ejector plate 6 is driven to reset, the next injection molding is carried out, the tail end of the second ejector pin 8 is flush with the bottom of the movable die forming cavity in the die assembly state, and the tail end of the second ejector pin 8 stretches into the movable die forming cavity.
For example, distance A is set to 25mm and distance B is set to 5mm.
In this embodiment, in order to automatically reset the ejector plate 6 during the mold closing process, a reset rod 13 is installed on the ejector plate 6, and the reset rod 13 penetrates through the movable mold plate 3; in the ejection process, the reset rod 13 stretches out under the drive of the ejector plate 6, in the mold closing process, part of the fixed mold assembly 2 can touch and push the stretched reset rod 13, the ejector plate 6 is pushed by the reset rod 13 to retreat and drive the first ejector pin 7 to reset, meanwhile, the limiting needle is separated from the movable mold plate 3, in an unstressed state, after the driving block 9 abuts against the reset seat 10, the reset seat 10 pushes the driving swing to reset, and the second ejector pin 8 is reset.
In this embodiment, in order to stably move the ejector plate 6, the fixed plate 5 is connected to the movable mold plate 3 through the guide post 15, and the ejector plate 6 is sleeved on the guide post 15.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters refer to like items and, thus, once an item is defined, no further discussion thereof is necessary in the following.
In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the illustrated azimuth or positional relationships, and are merely for convenience of describing the present utility model and simplifying the description, and these azimuth terms do not indicate and imply that the devices or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe spatial positional relationships of features. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.
If the utility model discloses or relates to components or structures fixedly connected with each other, then unless otherwise stated, the fixed connection is understood as: a detachable fixed connection (e.g. using a bolt or screw connection) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
While the foregoing is directed to the preferred embodiment, other and further embodiments of the utility model will be apparent to those skilled in the art from the following description, wherein the utility model is described, by way of illustration and example only, and it is intended that the utility model not be limited to the specific embodiments illustrated and described, but that the utility model is to be limited to the specific embodiments illustrated and described.
Claims (9)
1. The utility model provides a secondary ejection mould structure, includes movable mould subassembly, cover half subassembly, movable mould group is driven by the driving piece and is removed, its characterized in that:
the movable die assembly comprises a fixed plate, an ejector pin plate and a movable die plate which are sequentially arranged, the movable die plate is fixedly connected with the fixed plate, and the ejector pin plate is arranged between the fixed plate and the movable die plate in a sliding manner;
a movable mould forming cavity is arranged on the side surface of the movable mould plate, which is away from the fixed plate;
the ejector plate is provided with a first ejection mechanism and a second ejection mechanism;
the first ejection mechanism comprises a plurality of first ejector pins, and positioning rings are arranged at the tail ends of the first ejector pins;
the second ejection mechanism comprises a driving block, a second ejector pin, a reset seat and a limiting piece, wherein the middle part of the driving block is hinged with the ejector pin plate, the second ejector pin is arranged at the connecting end of the driving block, the limiting piece is positioned at the driving end of the driving block, the reset seat is arranged on the fixed plate, and the limiting piece is arranged on the movable mould plate or the ejector pin plate;
the cavity bottom of the movable mold forming cavity is provided with a plurality of through holes A, the first ejector pins penetrate through the through holes A, and the first ejector pins are arranged in one-to-one correspondence with the through holes A;
the cavity bottom of the movable mold forming cavity is provided with a through hole B, and the second ejector pin penetrates through the through hole B.
2. The secondary ejection die structure of claim 1, wherein: the ejector pin plate is characterized by further comprising an ejector power piece used for driving the ejector pin plate to move, and the ejector power piece drives the ejector pin plate to move along the axial direction of the first ejector pin.
3. The secondary ejection die structure of claim 2, wherein: the ejection power piece is an injection molding machine top roller, and the fixing plate is provided with a yielding hole for the injection molding machine top roller to pass through.
4. A secondary ejection die structure as in claim 3, wherein: and a reset rod is arranged on the ejector plate and penetrates through the movable template.
5. The secondary ejection die structure of claim 4, wherein: the fixed plate is connected with the movable template through a guide post, and the thimble plate is sleeved on the guide post.
6. The secondary ejection die structure of claim 1, wherein: the positioning ring is a ring-shaped notch arranged on the periphery of the top end of the first ejector pin, a convex part is coaxially arranged on the top end of the first ejector pin, and a ring-shaped notch is formed between the periphery of the convex part and the periphery of the top end of the first ejector pin.
7. The secondary ejection die structure of claim 1, wherein: the drive end of the driving piece is provided with a clamping groove for installing the second thimble.
8. The secondary ejection die structure of claim 1, wherein: the limiting piece is a limiting needle, a fixing seat is arranged on the ejector plate, a notch capable of accommodating the driving end of the driving block is formed in the fixing seat, and the limiting needle is sleeved in the notch.
9. The secondary ejection die structure of claim 8, wherein: the ejector plate is provided with a mounting hole, the driving block is hinged in the mounting hole through a beam rod, and the fixing seat is arranged at the end, far away from the fixing plate, in the mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223099665.1U CN219522922U (en) | 2022-11-22 | 2022-11-22 | Secondary ejection die structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223099665.1U CN219522922U (en) | 2022-11-22 | 2022-11-22 | Secondary ejection die structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219522922U true CN219522922U (en) | 2023-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223099665.1U Active CN219522922U (en) | 2022-11-22 | 2022-11-22 | Secondary ejection die structure |
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| Country | Link |
|---|---|
| CN (1) | CN219522922U (en) |
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- 2022-11-22 CN CN202223099665.1U patent/CN219522922U/en active Active
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