CN112936773A - Ejection mechanism and injection mold - Google Patents
Ejection mechanism and injection mold Download PDFInfo
- Publication number
- CN112936773A CN112936773A CN202110102783.4A CN202110102783A CN112936773A CN 112936773 A CN112936773 A CN 112936773A CN 202110102783 A CN202110102783 A CN 202110102783A CN 112936773 A CN112936773 A CN 112936773A
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- ejector
- assembly
- ejector pin
- plate
- ejection mechanism
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- 238000002347 injection Methods 0.000 title claims abstract description 50
- 239000007924 injection Substances 0.000 title claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000001746 injection moulding Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/38—Cutting-off equipment for sprues or ingates
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses an ejection mechanism and an injection mold, wherein the ejection mechanism comprises a fixed plate, a thimble assembly and a buckling machine assembly, wherein the thimble assembly is movably arranged on the fixed plate and is used for being in driving connection with an oil cylinder; the buckling machine assembly is connected with the ejector pin assembly and used for limiting the ejector pin assembly when the injection mold is opened or closed; when the injection mold is in a mold opening state, the ejector pin assembly is driven by the oil cylinder to eject from the initial position to a first preset position, and the ejector pin assembly is separated from the button machine assembly to cut off a water gap of a molded product. The invention improves the ejection structure of the die, realizes the function of automatically cutting off the ejection of the water gap, improves the production efficiency of products and reduces the production and manufacturing cost.
Description
Technical Field
The invention relates to the technical field of molds, in particular to an ejection mechanism and an injection mold.
Background
In mold design, the ejection mechanism is an important component of the mold, and its main function is to eject the molded part in the cavity or adhered to the core. In general, an ejection mechanism applies a pushing force to a fixed plate, and drives one or more ejector pins or ejector pins against a molded part through the fixed plate to eject the molded part molded in a mold cavity or adhered to a main mold core, thereby completing one-time molding processing and starting the next molding processing.
However, the formed part in the mold cavity is generally connected with a water gap, and the water gap on the formed part is manually cut off after the formed part is taken down.
Disclosure of Invention
The invention mainly aims to provide an ejection mechanism and an injection mold, aiming at realizing the function of automatically cutting off the ejection of a water gap, improving the production efficiency of products and reducing the production and manufacturing cost.
In order to achieve the above object, the present invention provides an ejection mechanism applied to an injection mold, wherein the injection mold comprises an oil cylinder, and the ejection mechanism comprises:
a fixing plate;
the thimble assembly is movably arranged on the fixing plate and is in driving connection with the oil cylinder; and
the buckling machine assembly is connected with the ejector pin assembly and used for limiting the ejector pin assembly when the injection mold is opened or closed;
when the injection mold is in a mold opening state, the ejector pin assembly is driven by the oil cylinder to eject from an initial position to a first preset position, and the ejector pin assembly is separated from the button machine assembly to automatically cut off a water gap of a molded product.
In an embodiment, a guide pillar assembly is disposed on the fixing plate, and the ejector pin assembly includes:
the first ejector plate is movably connected with the fixed plate through the guide pillar assembly, and a first ejector rod for ejecting a molded product is inserted in the first ejector plate;
the second ejector plate is movably connected with the fixed plate through the guide pillar assembly, and a second ejector rod for ejecting a molded product is inserted in the second ejector plate; and
the third ejector plate is movably connected with the fixed plate through the guide pillar assembly, and a third ejector rod for ejecting a molded product is inserted in the third ejector plate;
when the injection mold is in a mold opening state, under the driving of the oil cylinder, the first ejector pin plate and the second ejector pin plate are ejected from the initial position to the first preset position, the first ejector pin plate is separated from the button machine assembly to cut off a water gap of a molded product, and when the second ejector pin plate is ejected to a position attached to the third ejector pin plate, the first ejector pin, the second ejector pin and the third ejector pin synchronously descend to eject the molded product;
when the injection mold is in a mold closing state, the third ejector plate is reset to the closing state of the button machine assembly under the driving of the oil cylinder, and the first ejector plate and the second ejector plate are driven to reset to the initial positions so as to complete mold closing.
In one embodiment, the first ejector rod is a straight ejector rod, the second ejector rod is a straight ejector rod, and the third ejector rod is an inclined ejector rod.
In one embodiment, the ejection end of the first ejector rod is provided with a first push block used for abutting against a molded product;
the ejection end of the second ejector rod is provided with a second push block used for being abutted with a molded product;
and the ejection end of the third ejector rod is provided with a third push block used for being abutted against a formed product.
In an embodiment, a nozzle pogo pin is arranged in the third push block and used for popping the nozzle bonded on the third push block.
In an embodiment, the distance between the initial position and the first preset position is 30 mm.
In one embodiment, the button machine assembly comprises a die opening limit button machine and a die closing return button machine;
the mould opening limiting button machine is connected with the ejector pin assembly and is used for limiting the ejector pin assembly when the injection mould is in a mould opening state;
the die assembly return buckling machine is connected with the ejector pin assembly and used for limiting the ejector pin assembly when the injection mold is in a die opening state.
In one embodiment, the number of the die opening limit button machines is 4; the number of the die assembly return buckling machines is 2.
In one embodiment, the first ejector plate, the second ejector plate and the third ejector plate are connected through screws.
In order to achieve the above object, the present invention further provides an injection mold, including the above ejection mechanism, the ejection mechanism including:
a fixing plate;
the thimble assembly is movably arranged on the fixing plate and is in driving connection with the oil cylinder; and
the buckling machine assembly is connected with the ejector pin assembly and used for limiting the ejector pin assembly when the injection mold is opened or closed;
when the injection mold is in a mold opening state and the ejector pin assembly is ejected to a first preset position from an initial position under the driving of the oil cylinder, the ejector pin assembly is separated from the button machine assembly to cut off a water gap of a molded product.
According to the technical scheme, the ejection mechanism comprises a fixing plate, an ejector pin assembly and a buckling machine assembly, the ejector pin assembly is movably arranged on the fixing plate and is in driving connection with an oil cylinder, the buckling machine assembly is connected with the ejector pin assembly and is used for limiting the ejector pin assembly when the injection mold is opened or closed, when the injection mold is in an opened state and the ejector pin assembly is ejected from an initial position to a first preset position under the driving of the oil cylinder, the ejector pin assembly and the buckling machine assembly are separated to cut a water gap of a formed product, the function of automatically cutting the ejected water gap is realized, the production efficiency of the product is improved, and the production and manufacturing cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an ejection mechanism according to an embodiment of the present invention;
fig. 2 is a schematic structural view of another perspective of the ejection mechanism according to an embodiment of the present invention;
fig. 3 is an exploded view of an embodiment of the ejection mechanism of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
110 | |
| 200 | |
120 | Second ejector plate |
| 121 | |
130 | |
| 1111 | |
111 | First top rod |
| 1311 | Third push block | 131 | |
| 300 | Mold insert | 1211 | Second push block |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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 addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In mold design, the ejection mechanism is an important component of the mold, and its main function is to eject the molded part in the cavity or adhered to the core. In general, an ejection mechanism applies a pushing force to a fixed plate, and drives one or more ejector pins or ejector pins against a molded part through the fixed plate to eject the molded part molded in a mold cavity or adhered to a main mold core, thereby completing one-time molding processing and starting the next molding processing.
In some exemplary technologies, a water gap is connected to a formed part in a mold cavity, and during production, the formed part needs to be removed and then the water gap on the formed part needs to be manually cut off.
In order to realize the function of automatically cutting off the water gap in an ejection manner and improve the production efficiency of products so as to reduce the production and manufacturing cost, the invention provides an ejection mechanism which is suitable for a movable die of an injection mold.
Referring to fig. 1 to 3, in an embodiment of the present invention, the ejection mechanism includes a fixing plate (not shown), a thimble assembly 100 and a button assembly 200, wherein the thimble assembly 100 is movably disposed on the fixing plate and is configured to be drivingly connected to an oil cylinder of an injection mold; the button machine assembly 200 is connected with the ejector pin assembly 100 and used for limiting the ejector pin assembly 100 when the injection mold opens or closes the mold; when the injection mold is in a mold opening state, the ejector pin assembly 100 is driven by the oil cylinder to eject from the initial position to a first preset position, and the ejector pin assembly 100 is separated from the button machine assembly 200 to cut off a water gap of a molded product.
In this embodiment, the ejector pin assembly 100 and the button machine assembly 200 of the ejection mechanism can be mounted on the bottom plate of the movable mold of the injection mold through the fixing plate. The thimble assembly 100 may include a plurality of thimble plates and thimbles disposed on the thimble plates, and the thimble plates may be disposed on the fixing plate through guide pillars to realize the movable connection between the thimble plates and the fixing plate.
It should be noted that the fastener assembly 200 is used to control the mold opening sequence and the mold opening stroke of each mold plate (the ejector plate of the ejector assembly 200) so as to limit the ejector assembly 100 when the injection mold is opened or closed. The sear assembly 200 can be of any conventional construction, including a support plate, a spring, a stop, a pusher and a stop, or other constructions, and is not limited herein.
In this embodiment, pin assembly 100 may push the injection molded part out by a double ejection, wherein the first ejection cuts the gate off, and the second ejection pushes the gate off, both the lifter and the lifter, to eject the injection molded part from the mold cavity.
It can be understood that, in the ejection mechanism of the present invention, the ejector pin assembly 100 is movably disposed on the fixing plate and is used for being in driving connection with the oil cylinder, the button machine assembly 200 is connected with the ejector pin assembly 100 and is used for limiting the ejector pin assembly 100 when the injection mold is opened or closed, when the injection mold is in an opened state, the ejector pin assembly 100 is ejected from an initial position to a first preset position under the driving of the oil cylinder, the ejector pin assembly 100 is separated from the button machine assembly 200 (at this time, the straight ejection of the ejector pin assembly 100 ejects the injection molding product to the preset position, so that the injection molding product is separated from the nozzle on the injection molding product), and the nozzle of the molded product is cut off, thereby realizing the function of automatic cutting of nozzle ejection, improving the injection molding production efficiency of the product, and reducing the production and.
In an embodiment, referring to fig. 1 to 3, a guide pillar assembly (not shown) may be disposed on the fixing plate, and the ejector pin assembly 100 includes a first ejector plate 110, a second ejector plate 120, and a third ejector plate 130; the first ejector plate 110 is movably connected with the fixed plate through a guide post assembly, and a first ejector rod 111 for ejecting a molded product is inserted on the first ejector plate 110; the second ejector plate 120 is movably connected with the fixed plate through a guide post assembly, and a second ejector rod 121 for ejecting a molded product is inserted on the second ejector plate 120; the third ejector plate 130 is movably connected with the fixing plate through a guide post assembly, and a third ejector rod 131 for ejecting a molded product is inserted on the third ejector plate 130.
When the injection mold is in a mold opening state, under the driving of an oil cylinder, when the first ejector plate 110 and the second ejector plate 120 are ejected to a first preset position from an initial position, the first ejector plate 110 is separated from the button machine assembly 200 to cut off a water gap of a molded product, and when the second ejector plate 120 is ejected to a position attached to the third ejector plate 130, the first ejector rod 111, the second ejector rod 121 and the third ejector rod 131 synchronously descend to eject the molded product.
When the injection mold is in a mold closing state, the third ejector plate 130 is reset to a closing state of the button machine assembly 200 under the driving of the oil cylinder, and drives the first ejector plate 110 and the second ejector plate 120 to reset to initial positions so as to complete mold closing.
It can be understood that, in this embodiment, in the mold-open state, the first step acts: after the first ejector pin plate 110 and the second ejector pin plate 120 are ejected to a first preset position by the oil cylinder, the first ejector pin plate 110 is separated from a corresponding button machine to cut off a water gap; and a second step of action: the straight jacking and the inclined jacking are synchronously descended and simultaneously ejected when the second ejector plate 120 ejects to the third ejector plate 130; in a mold clamping state, the first step acts as follows: the mold closing oil cylinder returns the third ejector plate 130 to the corresponding closing state of the button machine to complete mold closing. The first ejector plate 110, the second ejector plate 120 and the third ejector plate 130 can be connected by screws.
It should be noted that the distance between the initial position and the first predetermined position may be 30mm to smoothly cut off the gate of the injection molded part. Of course, in some other embodiments, the ejector pin assembly 100 may be provided with a reasonable displacement according to the actual size, shape, etc. of the product, and is not limited herein.
In this embodiment, the first top bar 111 can be a straight top bar, the second top bar 121 can be a straight top bar, and the third top bar 131 can be an oblique top bar. Of course, in some other embodiments, multiple sets of ejector pins can be provided on each ejector plate to cooperate with each other to cut off the nozzle and eject the injection molded part, and this is not limited herein.
It should be noted that one end of the first lift pin 111 is fixed on the first lift pin plate 110, and the other end of the first lift pin 111 is inserted into the corresponding lift pin hole on the mold core 300; one end of the second ejector pin 121 is fixed on the second ejector pin plate 120, and the other end of the second ejector pin 121 is inserted into the corresponding ejector pin hole on the mold core 300; one end of the third lift pin 131 is fixed on the third lift pin plate 130, and the other end of the third lift pin 131 is inserted into the corresponding lift pin hole of the mold core 300.
Further, referring mainly to fig. 3, in an embodiment, the ejection end of the first ejector rod 111 is provided with a first push block 1111 for abutting against the molded product; the ejection end of the second ejector rod 121 is provided with a second ejector block 1211 used for abutting against a molded product; the ejecting end of the third ejector rod 131 is provided with a third ejector block 1311 for abutting against the molded product. So set up, can promote the ejecting efficiency of injection molding to reduce the destruction to the injection molding surface wall.
In one embodiment, the sear assembly 200 can include an open die limit sear and a closed die return sear; the die opening limiting button machine is connected with the ejector pin assembly 100 and is used for limiting the ejector pin assembly 100 when the injection mold is in a die opening state; the mold closing return fastener machine is connected with the ejector pin assembly 100 and used for limiting the ejector pin assembly 100 when the injection mold is in a mold opening state.
In this embodiment, the number of the die opening limiting fastener machines can be 4, so as to control the die opening sequence and the die opening stroke of each template; the number of the die-closing return button machines can be 2, so as to control the die-closing sequence and the die-closing stroke of each template. Of course, in some other embodiments, the ejection mechanism may also be provided with a greater or lesser number of sears according to actual requirements, which is not limited herein.
The invention further provides an injection mold, which comprises an ejection mechanism, the specific structure of the ejection mechanism refers to the above embodiments, and the injection mold provided by the invention comprises all the schemes of all the embodiments of the ejection mechanism, so that the injection mold at least has the same technical effects as the ejection mechanism, and the technical effects are not explained herein.
Referring to fig. 1 to 3, in an embodiment of the present invention, the ejection mechanism includes a fixing plate, a thimble assembly 100 and a button assembly 200, wherein the thimble assembly 100 is movably disposed on the fixing plate and is configured to be drivingly connected to an oil cylinder; the button machine assembly 200 is connected with the ejector pin assembly 100 and used for limiting the ejector pin assembly 100 when the injection mold opens or closes the mold; when the injection mold is in a mold opening state, the ejector pin assembly 100 is driven by the oil cylinder to eject from the initial position to a first preset position, and the ejector pin assembly 100 is separated from the button machine assembly 200 to cut off a water gap of a molded product.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides an ejection mechanism, is applied to injection mold's movable mould side, injection mold includes the hydro-cylinder, its characterized in that, ejection mechanism includes:
a fixing plate;
the thimble assembly is movably arranged on the fixing plate and is in driving connection with the oil cylinder; and
the buckling machine assembly is connected with the ejector pin assembly and used for limiting the ejector pin assembly when the injection mold is opened or closed;
when the injection mold is in a mold opening state, the ejector pin assembly is driven by the oil cylinder to eject from an initial position to a first preset position, and the ejector pin assembly is separated from the button machine assembly to automatically cut off a water gap of a molded product.
2. The ejection mechanism of claim 1, wherein the fixing plate is provided with a guide post assembly, and the ejector pin assembly comprises:
the first ejector plate is movably connected with the fixed plate through the guide pillar assembly, and a first ejector rod for ejecting a molded product is inserted in the first ejector plate;
the second ejector plate is movably connected with the fixed plate through the guide pillar assembly, and a second ejector rod for ejecting a molded product is inserted in the second ejector plate; and
the third ejector plate is movably connected with the fixed plate through the guide pillar assembly, and a third ejector rod for ejecting a molded product is inserted in the third ejector plate;
when the injection mold is in a mold opening state, under the driving of the oil cylinder, the first ejector pin plate and the second ejector pin plate are ejected from the initial position to the first preset position, the first ejector pin plate is separated from the button machine assembly to cut off a water gap of a molded product, and when the second ejector pin plate is ejected to a position attached to the third ejector pin plate, the first ejector pin, the second ejector pin and the third ejector pin synchronously descend to eject the molded product;
when the injection mold is in a mold closing state, the third ejector plate is reset to the closing state of the button machine assembly under the driving of the oil cylinder, and the first ejector plate and the second ejector plate are driven to reset to the initial positions so as to complete mold closing.
3. The ejection mechanism of claim 2, wherein the first ejector pin is a straight ejector pin, the second ejector pin is a straight ejector pin, and the third ejector pin is an angled ejector pin.
4. The ejection mechanism according to claim 3, wherein the ejection end of the first ejector pin is provided with a first push block for abutting against a molded product;
the ejection end of the second ejector rod is provided with a second push block used for being abutted with a molded product;
and the ejection end of the third ejector rod is provided with a third push block used for being abutted against a formed product.
5. The ejection mechanism of claim 4, wherein the third plunger has a nozzle pogo pin therein for popping out the nozzle bonded thereto.
6. An ejection mechanism as in claim 2, wherein the distance between the initial position and the first preset position is 30 mm.
7. The ejection mechanism of claim 1, wherein the fastener assembly includes an open-position fastener-holding machine and a closed-position fastener-returning machine;
the mould opening limiting button machine is connected with the ejector pin assembly and is used for limiting the ejector pin assembly when the injection mould is in a mould opening state;
the die assembly return buckling machine is connected with the ejector pin assembly and used for limiting the ejector pin assembly when the injection mold is in a die opening state.
8. The ejection mechanism of claim 7, wherein the number of die sinking limit fasteners is 4; the number of the die assembly return buckling machines is 2.
9. The ejector mechanism of claim 2, wherein the first ejector plate, the second ejector plate, and the third ejector plate are connected by screws.
10. An injection mold, characterized in that it comprises an ejection mechanism according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110102783.4A CN112936773B (en) | 2021-01-25 | 2021-01-25 | Ejection mechanism and injection mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110102783.4A CN112936773B (en) | 2021-01-25 | 2021-01-25 | Ejection mechanism and injection mold |
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| CN112936773A true CN112936773A (en) | 2021-06-11 |
| CN112936773B CN112936773B (en) | 2024-09-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114770880A (en) * | 2022-04-14 | 2022-07-22 | 深圳市集美模具科技有限公司 | Mould explosion is Ke ejection mechanism and injection mold |
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| CN114770880A (en) * | 2022-04-14 | 2022-07-22 | 深圳市集美模具科技有限公司 | Mould explosion is Ke ejection mechanism and injection mold |
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| Publication number | Publication date |
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| CN112936773B (en) | 2024-09-24 |
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