CN108115889B - A kind of injection molding demoulding mould - Google Patents

A kind of injection molding demoulding mould Download PDF

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Publication number
CN108115889B
CN108115889B CN201711365897.8A CN201711365897A CN108115889B CN 108115889 B CN108115889 B CN 108115889B CN 201711365897 A CN201711365897 A CN 201711365897A CN 108115889 B CN108115889 B CN 108115889B
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CN
China
Prior art keywords
thimble
demoulding
die
type core
injection molding
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Application number
CN201711365897.8A
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Chinese (zh)
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CN108115889A (en
Inventor
娄萍
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Zhejiang Huafa Ecological Sci. & Tech. Co., Ltd.
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Zhejiang Huafa Ecological Sci & Tech Co Ltd
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Priority to CN201711365897.8A priority Critical patent/CN108115889B/en
Publication of CN108115889A publication Critical patent/CN108115889A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/40Removing or ejecting moulded articles
    • B29C45/4005Ejector constructions; Ejector operating mechanisms
    • B29C45/401Ejector pin constructions or mountings

Abstract

The invention discloses a kind of injection molding demoulding moulds, are set to the type core and thimble between upper and lower mould including upper die and lower die;Primary demolded parts are equipped between the type core and the lower die;The lower die is equipped with thimble positioning element, and two stage mold unloading component is equipped between the thimble positioning element and the type core;The type core is equipped with the injection molding cavity passed through for thimble, and the thimble is equipped with the fastener matched with workpiece;When carrying out stripping operation, the primary demolded parts drive the fastener and the workpiece to be detached from first, and two stage mold unloading component driving workpiece and the injection molding cavity are detached from later.Primary and secondary demolded parts are arranged in the present invention, so as to realize step demoulding processing to workpiece, since workpiece uses secondary stripping operation, every time when demoulding, the pulling force, the active force that receive between mold and workpiece etc. are all smaller, and workpiece shaping integrity degree is high, and burn failure rate is low.

Description

A kind of injection molding demoulding mould
Technical field
The invention belongs to injection molding technology fields, more particularly, to a kind of injection molding demoulding mould.
Background technique
It is hollow when needing to form on workpiece to be molded for carrying out the mold of injection molding to plastic part when injection mold Pillar when, need injection molding when and meanwhile formed.Traditional injection moulding process is that thimble, thimble are arranged on injection mould Upper setting protrusion can form hollow pillar when injection molding outside plastic overmold to protrusion after demoulding.But this kind of structure For mold in demoulding, it is easy to appear bending or fracture, the service life of injection mould are short for the protrusion on thimble.And thimble and injection molding Frictional force between chamber is larger, and the resistance that when demoulding is subject to is larger, demoulds not smooth enough.
Summary of the invention
The present invention for overcome the deficiencies in the prior art, provides a kind of long service life, demoulding smoothly injection molding demoulding mould Tool.
To achieve the goals above, the invention adopts the following technical scheme: a kind of injection molding demoulding mould, including upper mold, under Mould is set to type core and thimble between upper and lower mould;Primary demolded parts are equipped between the type core and the lower die;The lower die It is equipped with thimble positioning element, two stage mold unloading component is equipped between the thimble positioning element and the type core;It is set on the type core There is the injection molding cavity passed through for thimble, the thimble is equipped with the fastener matched with workpiece;In the thimble and the injection molding cavity The power-assist structure for reducing frictional force between the two is equipped between wall;When carrying out stripping operation, the primary demolded parts The fastener and the workpiece is driven to be detached from first, two stage mold unloading component driving workpiece and the injection molding cavity are detached from later.This hair Bright setting primary and secondary demolded parts, so as to workpiece realize step demoulding processing, for the first time demould when, control fastener with Workpiece is first detached from, and controls workpiece again later and injection molding cavity is detached from, and when fastener and workpiece demould, workpiece remains motionless, and pushes up Needle vertical shift guarantees fastener vertically by detaching on workpiece;For comparing the case where traditional travelling workpiece realizes demoulding, The case where fastener is less prone to bending or fractures, is hardly damaged, long service life;And since workpiece uses secondary stripping operation, Every time when demoulding, pulling force, active force for receiving between mold and workpiece etc. are all smaller, and workpiece shaping integrity degree is high, burn failure Rate is low;The setting of power-assist structure, so that the frictional force between thimble and injection molding cavity is effectively reduced, thus in jacking workpiece When, more smoothly and rapid, stripping result is good.
Further, the primary demolded parts include support block, demoulding column, match with the demoulding column on type core Movable chamber, the demoulding chamber on the support block and the elastic component intracavitary set on demoulding;The demoulding column lower part and the lower die phase Even, the top for demoulding column is arranged in the movable chamber;When demoulding for the first time, lower die is moved downward with respect to type core, at this time support block It is moved in movable chamber, and then maintenance core, on motionless position, thimble follows lower die to move down together at this time, from And the fastener of thimble end and workpiece are disengaged, realize the demoulding between thimble and workpiece.
Further, the elastic component is sheathed on outside the demoulding column, which acts on the type core, separately One end acts on demoulding bottom of chamber wall;Elastic component can give always type core upward support force during lower die moves down, The type core of avoiding follows lower die to move downwardly together.
Further, the through slot matched with the demoulding column is equipped in the support block, which is equipped with and institute The first anti-falling piece that movable chamber matches is stated, lower part is equipped with the second anti-falling piece;The support block is equipped with and second anti-falling piece The holding tank matched, the holding tank are connected with the through slot, and second anti-falling piece is embedded in the holding tank.
Further, the thimble positioning element include the first positioning plate in the lower die and with first positioning The second positioning plate that plate is detachably connected is equipped with support column between first positioning plate and the type core;Pass through support column reality Now the support of type core is positioned.
Further, the two stage mold unloading component includes the opening passed through on second positioning plate for the thimble It slot, the through-hole passed through on first positioning plate for the thimble, the elastic telescopic part in the open slot and is set to The limiting section that thimble lower part is matched with the lower die;During lower die moves down, elastic telescopic part continues to the second positioning plate Downward support force is acted on, the positioning of the support to type core is further increased, prevents type core from moving when lower die is mobile, guarantee Thimble and workpiece realize fast demoulding;When lower die moves to the first anti-falling piece and inconsistent movable chamber on demoulding column, demoulding Column will start band ejector half core and move down, and when type core and positioning element are moved to inconsistent with mandril, mandril is by the second positioning Plate jacks up upwards, and the second positioning plate drives the first positioning plate and support column to move up, so that the top of support column will be extend out to Type core upper surface, and then by workpiece by being jacked up on type core, so that disengaging between workpiece and injection molding cavity, realize secondary demoulding;Due to The setting of elastic telescopic part, so that mandril, when jacking positioning element, elastic telescopic part can also give positioning element upward work Firmly, it so that the jacking of positioning element is more smoothly, demoulds more smooth.
Further, the support column lower part is equipped with the anti-delinking part matched with first positioning plate;Pass through anti-delinking part Cooperation, guarantee that support column and the first positioning plate can be realized synchronizing moving, during jacking workpiece, support column will not be by Deviate from first positioning plate.
Further, a mandril is equipped with below the lower die.
Further, the power-assist structure includes multiple ball cavities on the thimble and in the ball cavity Ball, the ball part extend out to the thimble outer wall;By the setting of ball, high degree reduces support column and note The contact area between chamber is moulded, to reduce frictional force between the two, support column along type core during moving up, ball It will roll, further decrease frictional force between the two, promote the speed of demoulding.
Further, the fastener is detachably connected by connection structure and the thimble;By between fastener and thimble Be detachably connected, when being bent or fractureing occur in fastener, individually fastener can be replaced, it is whole to extend equipment Service life.
Further, the connection structure includes the connector sleeve being connected with the fastener, set on the interior spiral shell of connector sleeve inner wall Line and the external screw thread in the thimble external wall of upper portion;By the fit system being spirally connected, structure is simple, convenient disassembly, maintenance It is easy to operate.
In conclusion the invention has the following advantages that setting primary and secondary demolded parts, divide so as to realize to workpiece Demoulding processing is walked, since workpiece uses secondary stripping operation, every time when demoulding, the pulling force that is received between mold and workpiece, effect Power etc. is all smaller, and workpiece shaping integrity degree is high, and burn failure rate is low;The setting of power-assist structure, so that between thimble and injection molding cavity Frictional force effectively reduced, so that more smoothly and rapid, stripping result is good when jacking workpiece.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the partial schematic diagram of thimble in the present invention.
Specific embodiment
In order to make those skilled in the art better understand the present invention program, below in conjunction in the embodiment of the present invention Attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described.
As shown in Figs. 1-2, a kind of injection molding demoulding mould, including upper mold 1, lower die 2, the type core 3 between upper and lower mould and Thimble 4;Primary demolded parts are equipped between the type core 3 and the lower die 2;The lower die 2 is equipped with thimble positioning element 5, Two stage mold unloading component is equipped between the thimble positioning element 5 and the type core 3;It is worn specifically, the type core 3 is equipped with for thimble The injection molding cavity 31 crossed, the thimble 4 are equipped with the fastener 41 that matches with workpiece, the fastener 41 by connection structure with it is described Thimble 4 is detachably connected;The connection structure includes the connector sleeve 42 being connected with the fastener 41, in 42 inner wall of connector sleeve Screw thread and the external screw thread in 4 external wall of upper portion of thimble, connector sleeve lower part are to be arranged in opening;Pass through matching for internal and external threads Conjunction, realization fastener and thimble are spirally connected, convenient for replacing to fastener;When carrying out stripping operation, the primary demolded parts The fastener 41 is driven to be detached from the workpiece first, two stage mold unloading component driving workpiece and the injection molding cavity 31 are detached from later; Secondary stripping operation in this way avoids the bending or fracture that cause fastener during demoulding.
Specifically, the primary demolded parts include support block 61, demoulding column 62, movable chamber 63, demoulding chamber 64 and elasticity Part 65, the support block 61 are set between type core and lower die, and the demoulding column 62 is arranged in the support block 61, and the movable chamber 63 is set In matching on type core with the demoulding column, it is equipped with the through slot matched with the demoulding column in the support block 61, on the demoulding column End is penetrated after through slot to movable chamber 63, and demoulding 62 lower part of column is connected with the lower die 2;Further, the demoulding column 62 Top is equipped with the first anti-falling piece 621 matched with the movable chamber, and lower part is equipped with the second anti-falling piece 622, first anti-falling piece 621 and second anti-falling piece 622 be respectively demould 62 outer wall of column direct out the flange extended to form;The demoulding chamber 64 demoulds chamber 64, the elastic component 65 is spring, and it is intracavitary which is set to demoulding, and elastic component 65 is sheathed on outside the demoulding column 62, should 65 one end of elastic component acts on the type core 3, and the other end acts on 64 bottom wall of demoulding chamber;Preferably, the support block 61 are equipped with the holding tank matched with second anti-falling piece 622, which is connected with the through slot, and described second is anti- De- part 622 is embedded in the holding tank.
The thimble positioning element 5 includes the first positioning plate 51 and the second positioning plate 52, first positioning plate 51 and the Two positioning plates 52 are set in the lower die, and first positioning plate and the second positioning plate 52 are removably attachable to one by screw It rises, and is equipped with support column 7 between first positioning plate 51 and the type core 3;The two stage mold unloading component include open slot 81, Through-hole, elastic telescopic part 82 and limiting section 83;The open slot 81 is set on second positioning plate 52, for the thimble It passing through, the elastic telescopic part 82 is spring, which is set in the open slot 81, the one of elastic telescopic part 82 End acts on open slot and determines wall, and the other end acts in lower die;The through-hole is set on first positioning plate 51, for described Thimble passes through;The limiting section 83 is set to thimble lower part, directs out for thimble lower sides and extends to form flange, the limiting section Can match with the lower die prevents thimble from moving up disengagement lower die;
Preferably, 7 lower part of support column is equipped with the anti-delinking part 71 matched with first positioning plate, the anti-delinking part 71 direct out the circle protrusion extended to form for 7 lower part of support column, which is embedded in the first positioning plate;Further , a mandril 9 is equipped with below the lower die 2, which is the mandril of injection molding machine, is no longer excessively repeated for the prior art;Injection molding The other structures of mould are that the prior art may be implemented, no longer excessively repeat.
In order to reduce the frictional force between 31 inner wall of thimble 4 and the injection molding cavity, we are in thimble 4 and the injection molding cavity 31 Power-assist structure is provided between inner wall;The power-assist structure includes multiple ball cavities 101 on the thimble and is set to the rolling The intracavitary ball 102 of pearl, the ball 102 are made of stainless steel, and the opening of ball cavity 101 is located on thimble side wall, opening Size is less than the diameter of ball, to can guarantee that ball part extend out to 4 outer wall of thimble, but not drops out;Further, Settable through slot is connected to the ball cavity at the top of thimble, and ball can be put by the through slot to ball cavity.
Obviously, described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment should fall within the scope of the present invention.

Claims (4)

1. a kind of injection molding demoulding mould, including upper mold (1), lower die (2), type core (3) and thimble (4) between upper and lower mould; Primary demolded parts are equipped between the type core (3) and the lower die (2);The lower die (2) is equipped with thimble positioning element (5), two stage mold unloading component is equipped between the thimble positioning element (5) and the type core (3);The type core (3) is equipped with for top The injection molding cavity (31) that needle passes through, the thimble (4) are equipped with the fastener (41) matched with workpiece;The thimble positioning element (5) the second positioning plate for including the first positioning plate (51) in the lower die and being detachably connected with first positioning plate (52), support column (7) are equipped between first positioning plate (51) and the type core (3), which is equipped with and is embedded In the anti-delinking part (71) in the first positioning plate;The two stage mold unloading component includes being set on second positioning plate (52) for described Open slot (81) that thimble passes through is set to the through-hole passed through on first positioning plate (51) for the thimble, is set to the opening Elastic telescopic part (82) in slot and the limiting section (83) matched set on thimble lower part with the lower die;Under the lower die (2) Side is equipped with a mandril (9), which is equipped with the through-hole passed through for mandril, has between mandril (9) upper end and the second positioning plate There is spacing;When carrying out stripping operation, lower die is moved downward with respect to type core, and thimble follows lower die to move down together, drives institute It states fastener (41) and the workpiece is detached from;Pushing rod the second positioning plate is jacked up upwards, the second positioning plate drive first positioning Plate and support column move up, so that the top of support column will extend out to type core upper surface, by workpiece by being jacked up on type core, workpiece It is disengaged between injection molding cavity;It is equipped between the thimble (4) and the injection molding cavity (31) inner wall and rubs between the two for reducing The power-assist structure of power;The power-assist structure includes multiple ball cavities (101) on the thimble and is set in the ball cavity Ball (102), the ball (102) partially extend out to the thimble (4) outer wall.
2. injection molding demoulding mould according to claim 1, it is characterised in that: the primary demolded parts include support block (61), column (62), the movable chamber (63) matched on type core with the demoulding column, the demoulding chamber on the support block are demoulded (64) and set on demoulding intracavitary elastic component (65);The demoulding column (62) lower part is connected with the lower die (2), demoulds the upper of column Portion is arranged in the movable chamber (63).
3. injection molding demoulding mould according to claim 2, it is characterised in that: the elastic component (65) is sheathed on the demoulding Outside, which acts on the type core (3) column (62), and the other end acts on demoulding chamber (64) bottom wall.
4. injection molding demoulding mould according to claim 2, it is characterised in that: be equipped with and the demoulding in the support block (61) The through slot that column matches, demoulding column (62) top are equipped with the first anti-falling piece (621) matched with the movable chamber, and lower part is set There are the second anti-falling piece (622);The support block (61) is equipped with the holding tank matched with second anti-falling piece (622), the appearance Slot of receiving is connected with the through slot, and second anti-falling piece (622) is embedded in the holding tank.
CN201711365897.8A 2017-12-18 2017-12-18 A kind of injection molding demoulding mould Active CN108115889B (en)

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Application Number Priority Date Filing Date Title
CN201711365897.8A CN108115889B (en) 2017-12-18 2017-12-18 A kind of injection molding demoulding mould

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Application Number Priority Date Filing Date Title
CN201711365897.8A CN108115889B (en) 2017-12-18 2017-12-18 A kind of injection molding demoulding mould
CN201910254123.0A CN109968603B (en) 2017-12-18 2017-12-18 Injection molding die

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CN201910254123.0A Division CN109968603B (en) 2017-12-18 2017-12-18 Injection molding die

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CN108115889A CN108115889A (en) 2018-06-05
CN108115889B true CN108115889B (en) 2019-04-26

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CN201711365897.8A Active CN108115889B (en) 2017-12-18 2017-12-18 A kind of injection molding demoulding mould
CN201910254123.0A Active CN109968603B (en) 2017-12-18 2017-12-18 Injection molding die

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006007272A (en) * 2004-06-25 2006-01-12 Aisin Seiki Co Ltd Die for molding
US8371016B2 (en) * 2010-10-06 2013-02-12 Cheng Uei Precision Industry Co., Ltd. Assembling method of an injection mold
CN201824534U (en) * 2010-10-29 2011-05-11 深圳市兆威机电有限公司 Secondary ejecting mechanism for ball mold
CN204149468U (en) * 2014-09-10 2015-02-11 苏州汉扬精密电子有限公司 Flexible glue cast gate delayed ejection structure
CN205310722U (en) * 2016-01-13 2016-06-15 厦门唯科模塑科技有限公司 Novel second grade ejection mechanism
CN205997289U (en) * 2016-08-24 2017-03-08 北京灵铱科技有限公司 2 ejecting structures of application on a kind of plastic mould

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CN109968603A (en) 2019-07-05
CN108115889A (en) 2018-06-05
CN109968603B (en) 2021-01-12

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Effective date of registration: 20190404

Address after: 312400 No. 16 Huafa Road, Sanjie Town, Shengzhou City, Shaoxing City, Zhejiang Province

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Address before: 310000 Youcheng Plastic Mould No. 8 Youcheng Road, Xiaoshan District, Hangzhou City, Zhejiang Province

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