CN108115906A - A kind of plastics injection mould - Google Patents

A kind of plastics injection mould Download PDF

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Publication number
CN108115906A
CN108115906A CN201711368998.0A CN201711368998A CN108115906A CN 108115906 A CN108115906 A CN 108115906A CN 201711368998 A CN201711368998 A CN 201711368998A CN 108115906 A CN108115906 A CN 108115906A
Authority
CN
China
Prior art keywords
thimble
demoulding
core
die
workpiece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201711368998.0A
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Chinese (zh)
Other versions
CN108115906B (en
Inventor
娄萍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shantou three run Electromechanical Technology Co., Ltd.
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娄萍
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Publication date
Application filed by 娄萍 filed Critical 娄萍
Priority to CN201711368998.0A priority Critical patent/CN108115906B/en
Publication of CN108115906A publication Critical patent/CN108115906A/en
Application granted granted Critical
Publication of CN108115906B publication Critical patent/CN108115906B/en
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Classifications

    • 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
    • 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
    • B29C45/2602Mould construction elements
    • 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 plastics injection moulds, and the core and thimble between upper and lower mould are arranged on including upper die and lower die;Primary demolded parts are equipped between the 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 core;The core is equipped with the injection molding cavity passed through for thimble, and the thimble is equipped with and the matched fastener of workpiece;When carrying out stripping operation, the primary demolded parts drive the fastener to depart from the workpiece first, and two stage mold unloading component driving workpiece departs from the injection molding cavity afterwards.The present invention sets primary and secondary demolded parts, so as to realize step demoulding processing to workpiece, since workpiece uses secondary stripping operation, every time during the demoulding, the pulling force, the active force that are received 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 plastics injection mould
Technical field
The invention belongs to injection molding technology field, more particularly, to a kind of plastics injection mould.
Background technology
It is hollow when needing to be molded on workpiece to be molded for carrying out the mold of injection molding to plastic part during injection mold Pillar when, it is necessary to injection when be carried out at the same time shaping.Traditional injection moulding process is that thimble, thimble are set on injection mould Upper setting protrusion during injection outside plastic overmold to protrusion, can form hollow pillar after the demoulding.But this kind of structure For mold in the demoulding, it is easy to appear bending or fracture, the service lifes of injection mould for the protrusion on thimble.
The content of the invention
The present invention in order to overcome the deficiencies of the prior art and provide it is a kind of be hardly damaged, plastics injection mould easy to maintenance.
To achieve these goals, the present invention uses following technical scheme:A kind of plastics injection mould, including upper mold, under Mould is arranged on core and thimble between upper and lower mould;Primary demolded parts are equipped between the core and the lower die;The lower die Thimble positioning element is equipped with, two stage mold unloading component is equipped between the thimble positioning element and the core;It is set on the core There is the injection molding cavity passed through for thimble, the thimble is equipped with and the matched fastener of workpiece;The fastener by connection structure with The thimble is detachably connected;When carrying out stripping operation, the primary demolded parts drive the fastener and the work first Part departs from, and two stage mold unloading component driving workpiece departs from the injection molding cavity afterwards.The present invention sets primary and secondary demolded parts, So as to realize step demoulding processing to workpiece, when demoulding for the first time, control fastener is first departed from workpiece, is controlled again afterwards Workpiece and injection molding cavity depart from, and when fastener is demoulded with workpiece, workpiece remains motionless, and thimble vertical shift, ensure fastener vertically by It spins off on workpiece;For comparing the situation that traditional travelling workpiece realizes the demoulding, fastener is less prone to what is bent or fracture Situation is hardly damaged, and service life is long;And since workpiece uses secondary stripping operation, every time during the demoulding, between mold and workpiece The pulling force, the active force that receive etc. are all smaller, and workpiece shaping integrity degree is high, and burn failure rate is low;The setting of power-assist structure so that top Frictional force between pin and injection molding cavity is effectively reduced, thus when jacking workpiece, more smoothly and rapid, stripping result It is good;It, can be individually to fastener when fastener occurs bending or fracture by being detachably connected between fastener and thimble It is replaced, extends the service life of equipment entirety.
Further, the primary demolded parts include support block, demould column, is matched with the demoulding column on core Movable chamber, the demoulding chamber on the support block and the elastic component arranged on demoulding intracavitary;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 core, at this time support block It is moved in movable chamber, and then holding core, on motionless position, thimble follows lower die to move down together at this time, from And so that the fastener of thimble end and workpiece disengage, realize the demoulding between thimble and workpiece.
Further, the elastic component is sheathed on outside the demoulding column, which acts on the core, separately One end acts on the demoulding bottom of chamber wall;Elastic component can give core upward support force always during lower die moves down, Avoid core that lower die is followed to move downwardly together.
Further, it is equipped in the support block and demoulds the matched straight slot of column with described, which is equipped with and institute Matched first anti-falling piece of movable chamber is stated, lower part is equipped with the second anti-falling piece;The support block is equipped with and second anti-falling piece Matched holding tank, the holding tank are connected with the straight slot, and second anti-falling piece is embedded in the holding tank.
Further, the thimble positioning element include be arranged on the lower die on the first positioning plate and with this first positioning The second positioning plate that plate is detachably connected is equipped with support column between first positioning plate and the core;It is real by support column Now the support of core is positioned.
Further, the two stage mold unloading component includes being arranged on the opening passed through for the thimble on second positioning plate It slot, the through hole passed through on first positioning plate for the thimble, the elastic telescopic part in the open slot and is arranged on Thimble lower part and the matched limiting section of the lower die;During lower die moves down, elastic telescopic part continues to the second positioning plate Downward support force is acted on, the support positioning to core is further improved, prevents core from being moved when lower die moves, ensure Thimble realizes fast demoulding with workpiece;When the first anti-falling piece that lower die is moved on demoulding column is inconsistent with movable chamber, the demoulding Column will start that core is driven to move down, and when 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, and will be extend out to so as to the top of support column Core upper surface, and then by workpiece by being jacked up on core so that it is disengaged between workpiece and injection molding cavity, realizes the secondary demoulding;Due to The setting of elastic telescopic part so that for mandril when jacking positioning element, elastic telescopic part can also give positioning element upward work Firmly, so that the jacking of positioning element is more smoothly, the demoulding is more smooth.
Further, the support column lower part is equipped with and the matched anti-delinking part of the first positioning plate;Pass through anti-delinking part Cooperation, ensure that support column and the first positioning plate can realize synchronizing moving, during workpiece is jacked, support column will not be by Deviate from first positioning plate.
Further, it is equipped with a mandril below the lower die.
Further, the connection structure includes the connector sleeve, the interior spiral shell arranged on connector sleeve inner wall that are connected with the fastener Line and the external screw thread in the thimble external wall of upper portion;It is simple in structure by the fit system being spirally connected, convenient disassembly, repair It is easy to operate.
In conclusion the present invention has the following advantages:Primary and secondary demolded parts are set, are divided so as to be realized to workpiece Demoulding processing is walked, since workpiece is using secondary stripping operation, every time during the 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.
Description of the drawings
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 which those skilled in the art is made to be better understood from the present invention program, below in conjunction in the embodiment of the present invention Attached drawing carries out the technical solution in the embodiment of the present invention clear, complete description.
As shown in Figs. 1-2, a kind of plastics injection mould, including upper mold 1, lower die 2, the core 3 between upper and lower mould and Thimble 4;Primary demolded parts are equipped between the 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 core 3;It is worn specifically, the core 3 is equipped with for thimble The injection molding cavity 31 crossed, the thimble 4 be equipped with fastener 41 matched 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 set in opening;Pass through matching somebody with somebody for internal and external threads Conjunction, realization fastener and thimble are spirally connected, convenient for being replaced to fastener;When carrying out stripping operation, the primary demolded parts The fastener 41 is driven to depart from the workpiece first, the workpiece of two stage mold unloading component driving afterwards departs from the injection molding cavity 31; Secondary stripping operation in this way avoids causing the bending or fracture of 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 arranged between core and lower die, and the demoulding column 62 is arranged in the support block 61, and the movable chamber 63 is set Be equipped in being engaged on core with the demoulding column, in the support block 61 with the demoulding matched straight slot of column, on the demoulding column It is penetrated after holding through straight slot to movable chamber 63, the demoulding 62 lower part of column is connected with the lower die 2;Further, the demoulding column 62 Top is equipped with is equipped with the second anti-falling piece 622, first anti-falling piece with matched first anti-falling piece 621 of the movable chamber, lower part 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, which is arranged on demoulding intracavitary, and elastic component 65 is sheathed on outside the demoulding column 62, should 65 one end of elastic component is acted on the core 3, and the other end acts on the demoulding 64 bottom wall of chamber;Preferably, the support block 61 be equipped with the 622 matched holding tank of the second anti-falling piece, which is connected with the straight slot, and described second prevents 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 arranged in the lower die, and first positioning plate and the second positioning plate 52 are removably attachable to one by screw It rises, and support column 7 is equipped between first positioning plate 51 and the 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 arranged on second positioning plate 52, for the thimble It passing through, the elastic telescopic part 82 is spring, which is arranged in the open slot 81, the one of elastic telescopic part 82 End acts on open slot and determines wall, and the other end is acted in lower die;The through hole is arranged on first positioning plate 51, for described Thimble passes through;The limiting section 83 is arranged on thimble lower part, is directed out for thimble lower sides and extends to form flange, the limiting section Can be engaged with the lower die prevents thimble from moving up disengagement lower die;
Preferably, 7 lower part of support column be equipped with the matched anti-delinking part 71 of first positioning plate, which is 7 lower part of support column directs out the circle protrusion extended to form, which is embedded in the first positioning plate;Further, 2 lower section of lower die is equipped with a mandril 9, which is the mandril of injection molding machine, is no longer excessively repeated for the prior art;Injection mould Other structures are that the prior art can be realized, 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 the multiple ball chambers 101 being arranged on the thimble and arranged on the rolling The ball 102 of pearl intracavitary, the ball 102 are made of stainless steel, and the opening of ball chamber 101 is located on thimble side wall, opening Size is less than the diameter of ball, so as to ensure that ball part extend out to 4 outer wall of thimble, but not drops out;Further, At the top of thimble straight slot can be set to be connected with the ball chamber, ball can be put by the straight slot to ball intracavitary.
Obviously, described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work Embodiment should all belong to the scope of protection of the invention.

Claims (9)

1. a kind of plastics injection mould, including upper mold(1), lower die(2), core between upper and lower mould(3)And thimble(4); The core(3)With the lower die(2)Between be equipped with primary demolded parts;The lower die(2)It is equipped with thimble positioning element (5), the thimble positioning element(5)With the core(3)Between be equipped with two stage mold unloading component;The core(3)It is equipped with for top The injection molding cavity that pin passes through(31), the thimble(4)It is equipped with and the matched fastener of workpiece(41);The fastener(41)Pass through company Binding structure and the thimble(4)It is detachably connected;When carrying out stripping operation, the primary demolded parts drive the card first Part(41)Depart from the workpiece, afterwards two stage mold unloading component driving workpiece and the injection molding cavity(31)Depart from.
2. plastics injection mould according to claim 1, it is characterised in that:The primary demolded parts include support block (61), the demoulding column(62), on core with the matched movable chamber of demoulding column(63), demoulding chamber on the support block (64)And the elastic component arranged on demoulding intracavitary(65);The demoulding column(62)Lower part and the lower die(2)It is connected, demoulds the upper of column Portion is arranged in the movable chamber(63)It is interior.
3. plastics injection mould according to claim 2, it is characterised in that:The elastic component(65)It is sheathed on the demoulding Column(62)Outside, the elastic component(65)One end acts on the core(3)On, the other end acts on the demoulding chamber(64)Bottom wall.
4. plastics injection mould according to claim 2, it is characterised in that:The support block(61)It is interior to be equipped with and the demoulding The matched straight slot of column, the demoulding column(62)Top is equipped with and matched first anti-falling piece of the movable chamber(621), lower part is set There is the second anti-falling piece(622);The support block(61)It is equipped with and second anti-falling piece(622)Matched holding tank, the appearance Slot of receiving is connected with the straight slot, second anti-falling piece(622)It is embedded in the holding tank.
5. plastics injection mould according to claim 1, it is characterised in that:The thimble positioning element(5)Including being arranged on The first positioning plate in the lower die(51)With the second positioning plate being detachably connected with first positioning plate(52), described first Positioning plate(51)With the core(3)Between be equipped with support column(7).
6. plastics injection mould according to claim 5, it is characterised in that:The two stage mold unloading component includes being arranged on described Second positioning plate(52)On the open slot that is passed through for the thimble(81), arranged on first positioning plate(51)It is upper to supply the thimble The through hole passed through, the elastic telescopic part in the open slot(82)And arranged on thimble lower part and the matched /V of the lower die Portion(83).
7. plastics injection mould according to claim 6, it is characterised in that:The support column(7)Lower part be equipped with it is described The matched anti-delinking part of first positioning plate(71).
8. plastics injection mould according to claim 1, it is characterised in that:The lower die(2)Lower section is equipped with a mandril (9).
9. plastics injection mould according to claim 1, it is characterised in that:The connection structure includes and the fastener (41)Connected connector sleeve(42), arranged on connector sleeve(42)The internal thread of inner wall and arranged on the thimble(4)In external wall of upper portion External screw thread.
CN201711368998.0A 2017-12-18 2017-12-18 A kind of plastics injection mould Active CN108115906B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711368998.0A CN108115906B (en) 2017-12-18 2017-12-18 A kind of plastics injection mould

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711368998.0A CN108115906B (en) 2017-12-18 2017-12-18 A kind of plastics injection mould

Publications (2)

Publication Number Publication Date
CN108115906A true CN108115906A (en) 2018-06-05
CN108115906B CN108115906B (en) 2019-02-22

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CN201711368998.0A Active CN108115906B (en) 2017-12-18 2017-12-18 A kind of plastics injection mould

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08332560A (en) * 1995-06-09 1996-12-17 Ahresty Corp Product ejecting pin for die casting machine
JP2000052382A (en) * 1998-08-05 2000-02-22 Sekisui Koki Seisakusho:Kk Injection molding die
JP2009241434A (en) * 2008-03-31 2009-10-22 Modeia Create Kk Cylinder unit and mold assembly using it
CN201371561Y (en) * 2009-02-23 2009-12-30 福星塑胶模具(深圳)有限公司 Injection mold and secondary ejector mechanism thereof
CN203019638U (en) * 2012-12-21 2013-06-26 台州市凯华塑业有限公司 Internal undercut demoulding mechanism of injection mold
CN203293488U (en) * 2013-05-21 2013-11-20 台州市凯华塑业有限公司 Injection mold pin roller and clamping groove secondary demolding mechanism
CN204955290U (en) * 2015-09-14 2016-01-13 台州市黄岩星泰塑料模具有限公司 Be applied to mould structure of product mounting screw post
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

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08332560A (en) * 1995-06-09 1996-12-17 Ahresty Corp Product ejecting pin for die casting machine
JP2000052382A (en) * 1998-08-05 2000-02-22 Sekisui Koki Seisakusho:Kk Injection molding die
JP2009241434A (en) * 2008-03-31 2009-10-22 Modeia Create Kk Cylinder unit and mold assembly using it
CN201371561Y (en) * 2009-02-23 2009-12-30 福星塑胶模具(深圳)有限公司 Injection mold and secondary ejector mechanism thereof
CN203019638U (en) * 2012-12-21 2013-06-26 台州市凯华塑业有限公司 Internal undercut demoulding mechanism of injection mold
CN203293488U (en) * 2013-05-21 2013-11-20 台州市凯华塑业有限公司 Injection mold pin roller and clamping groove secondary demolding mechanism
CN204955290U (en) * 2015-09-14 2016-01-13 台州市黄岩星泰塑料模具有限公司 Be applied to mould structure of product mounting screw post
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

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Effective date of registration: 20190115

Address after: 515041 No. 3 Workshop of Gou Nan Jiudou Industrial Zone, Jinping District, Shantou City, Guangdong Province

Applicant after: Shantou three run Electromechanical Technology Co., Ltd.

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

Applicant before: Lou Ping

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