CN103407075B - A kind of internal and external threads plastic part mould of full-automatic molding band difference pitch - Google Patents

A kind of internal and external threads plastic part mould of full-automatic molding band difference pitch Download PDF

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Publication number
CN103407075B
CN103407075B CN201310304955.1A CN201310304955A CN103407075B CN 103407075 B CN103407075 B CN 103407075B CN 201310304955 A CN201310304955 A CN 201310304955A CN 103407075 B CN103407075 B CN 103407075B
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thread core
core
internal
plastic
internal thread
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CN103407075A (en
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曾杰强
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Guangdong Liansu Technology Industrial Co Ltd
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Guangdong Liansu Technology Industrial Co Ltd
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Abstract

The invention discloses the internal and external threads plastic part mould of a kind of full-automatic molding band difference pitch, including molding plastic externally threaded external screw thread core, the first internal thread core of molding plastic female thread, described first internal thread core passes external screw thread core;Being provided with spline in described external screw thread core, internal thread core is provided with the spline boss being engaged with spline.Utilize spline to be engaged between external screw thread core and the first internal thread core, make external screw thread core and the internal and external threads of the first internal thread core asynchronous abjection plastic.The internal and external threads plastic of full-automatic molding band difference pitch, it is provided that production efficiency and reduction production cost, and improve plastic quality.

Description

A kind of internal and external threads plastic part mould of full-automatic molding band difference pitch
Technical field
The present invention relates to plastic part mould field, more particularly, to the inside and outside spiral shell of a kind of full-automatic molding band difference pitch Stricture of vagina plastic part mould.
Background technology
For some internal and external threads plastics of band difference pitch on same one end, when the outer spiral shell of the restriction of plastic component structure and shape Stricture of vagina can not be by two petal chambeies to time half-formed, and external screw thread can only will rotate strand tooth by rotation strand tooth abjection, i.e. internal and external threads and take off Go out, if female thread tooth away from from external screw thread tooth when different, axial speed must be produced when rotating the building core of internal and external threads simultaneously It is poor to spend, pitch big must than pitch little move axially fast, it is difficult to synchronize to take off internal and external threads, for these feelings by strand tooth Condition, develops this series products and is difficult to full-automatic Leave out thread, is placed on mould, has been molded when can only be molded by movable insert After Biing must manual demolition, so considerably increase production cost and reduce production efficiency, and Product Precision it cannot be guaranteed that, shadow Ring the quality of plastic.
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention proposes the internal and external threads of a kind of full-automatic molding band difference pitch and moulds Part mould, uses this plastic part mould can the plastic internal and external threads structure of the asynchronous different pitch of abjection, it is achieved full-automatic.
To achieve these goals, the technical scheme is that
The internal and external threads plastic part mould of a kind of full-automatic molding band difference pitch, including the externally threaded external screw thread of molding plastic Core, the first internal thread core of molding plastic female thread, described first internal thread core passes external screw thread core;Described outer spiral shell Stricture of vagina core is provided with spline, internal thread core be provided be engaged with spline spline boss.External screw thread core and first The pitch of internal thread core determines according to the model of actual plastic.
When there is groove on the external screw thread of plastic, the most described external screw thread core is additionally operable to molding plastic groove.
When external screw thread away from more than female thread away from time, the end of the spline of described external screw thread core and the first internal thread core Spline boss between be provided with certain stroke X, described stroke X have to be larger than first internal thread core abjection plastic time external screw thread The axial displacement difference that core and the first internal thread core produce.
Described external screw thread core end has inserted a tin bronze set, described tin bronze set endoporus and the first internal thread core External diameter is slidably matched.
Described when matched moulds state, described tin bronze set endoporus bottom surface holds out against the terminal surface of the first internal thread core, makes It can not retreat;When, after the completely disengaged product of external screw thread core, the first internal thread core end will not completely disengage from tin bronze set Endoporus.
If the two ends of plastic are inconsistent, i.e. the other end is made up of the screw thread of a plurality of reinforcement and inner side outside, described Plastic part mould also includes reinforcement core and second internal thread core of molding plastic female thread of molding plastic reinforcement, described Second internal thread core passes reinforcement core.
Described plastic part mould also includes central core, and central core participates in the straight body of molding plastic through the second internal thread core Section.
Compared with prior art, the invention have the benefit that and between external screw thread core and the first internal thread core, utilize flower Key is engaged, and makes external screw thread core and the internal and external threads of the first internal thread core asynchronous abjection plastic.Full-automatic molding band difference spiral shell Away from internal and external threads plastic, it is provided that production efficiency and reduce production cost, and improve plastic quality.
Accompanying drawing explanation
Fig. 1-4 is the molding plastic product structural analysis figure using the present invention.
Fig. 5 is the mould structure schematic diagram of the present invention.
Fig. 6 is the rear mold top partial view diagram of the present invention.
Fig. 7 is the one side gear drive schematic diagram of the present invention.
Fig. 8 is the another side gear drive schematic diagram of the present invention.
Fig. 9,10 it is the schematic three dimensional views of rear mold part of the present invention.
Figure 11 is the schematic three dimensional views of the front mould part of the present invention.
Figure 12 is the work process view using molding internal and external threads of the present invention to depart from core.
Figure 13 is the schematic diagram of slide plate of the present invention.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings, but embodiments of the present invention are not limited to this.
Plastic component structure is analyzed: plastic as Figure 1-4, and external screw thread 503 and pitch that one end band pitch is bigger are less interior That N1 of screw thread forms, and has a circle groove 502 bottom external screw thread 503, and the other end has a plurality of reinforcement 501 and female thread N2 505 groups Become.The existence of groove 502 limits external screw thread 503 can not be by two petal chambeies to time half-formed, and external screw thread 503 can only be by rotating strand tooth Abjection, but due to external screw thread 503 tooth away from the tooth more than female thread N1 504 away from, an axial speed must be produced when producing simultaneously It is poor to spend.Therefore external screw thread 503 and female thread N1 504 can not be by same thread core molding.Therefore the molding of plastic is divided into several Individual parts form.
Concrete mould structure:
By external screw thread 503 and a circle groove 502 of the external screw thread core 1 bigger pitch of molding plastic, in its interstitial hole, work has Spline.
First internal thread core 2 passes participation molding plastic female thread N1 504 part of external screw thread core 1, and in first Thread core 2 diametric plane is provided with spline boss and is engaged with spline in external screw thread core 1, and the end of spline sets with spline boss There is certain stroke X.External screw thread core 1 end has inserted a tin bronze set 22, and described tin bronze overlaps in 22 endoporus and first The external diameter of thread core 2 is slidably matched.
The effect of tin bronze set 22 is withstood the first internal thread core 2 when being matched moulds and is prevented it from retreating, and anti-in motor process Only the first internal thread core 2 turns burning.
External screw thread core 1 external diameter has the first driven gear 24, the first driven gear 24 two ends to divide by flat key fixed-link The first take-up housing 7 is not had to push down with the taper roll bearing on the first slide pressing plate 6, the first take-up housing 7 and the first slide pressing plate 6 Fixing by screw link, it is achieved external screw thread core 1 first take-up housing 7 and first slide pressing plate 6 relative with the first driven gear 24 Axial restraint.
First Transition gear 10 two ends are respectively by being fixed on rear pattern plate 20 and the deep groove ball bearing pressure of the first gear housing 11 Live, and First Transition gear 10 engages the first driven gear 24 and first respectively and drives gear 14.First drives gear 14 two ends Pushed down by the deep groove ball bearing being fixed on the first gear housing 11 and the first gear box cover 12 respectively.First oil motor 13 is fixed on On first gear housing 11, and the keyway in gear 14 is driven to be engaged with first.
First take-up housing 7 both sides are pushed down by the first press strip 26, and baffle plate 8 is fixed on the end of two first press strips 26 by screw End.Two groups of contour screws are each passed through the first compression spring 9 and are connected to the end of the first take-up housing 7.
For product other end, reinforcement core 3 is fixed on reinforcement core and fixes on seat 23, participates in plastic reinforcement The molding of 501;Second internal thread core 4 participates in molding plastic female thread N2 505 part through reinforcement core 3;Central core 5 participate in the straight figure of molding plastic product 506 again through the second internal thread core 4.
Inside casing 29 two ends fix seat 23 with reinforcement core respectively and central core fixes seat 30 company of being screwed Connect.And inside casing 29 pushes down the second take-up housing 39 and the both sides of take-up housing pressing plate 38 respectively.Article two, press the most respectively to two press strips 28 Live that reinforcement core fixes seat 23, inside casing 29, central core fix the two ends of seat 30.
Second internal thread core 4 external diameter has driven gear 31, driven gear 31 two ends to have respectively by flat key fixed-link Second take-up housing 39 is pushed down with the taper roll bearing on seat pressing plate 38, and the second take-up housing 39 is linked solid with seat pressing plate 38 by screw Fixed, it is achieved the second internal thread core 4 second take-up housing 39 relative with driven gear 31 and seat pressing plate 38 axial restraint.
Second transition gear 33 two ends are respectively by being fixed on rear pattern plate 20 and the deep groove ball bearing pressure of the second gear housing 36 Live, and the second transition gear 33 engages driven gear 31 and second respectively and drives gear 34.Second drives gear 34 two ends respectively Pushed down by the deep groove ball bearing being fixed on the second gear housing 36 and the second gear box cover 37.Second oil motor 35 is fixed on second On gear housing 36, and the keyway in gear 34 is driven to be engaged with second.
Two groups of contour screws are each passed through the second compression spring 32 and are connected to the end of the second take-up housing 39.Central core 5 Being fixed on central core and fix on seat 30, central core is fixed seat 30 two ends and is connected to roller 27, and two groups of rollers 27 It is hidden in respectively in slide plate 15 guide runner being fixed on front template 25.
Front cavity 6 is set in front template 25, and rear cavity 19 is set in rear pattern plate 20, participates in other glue of molding plastic respectively Position.First latch segment the 16, second latch segment 17 is set in front template 25, respectively locked first take-up housing 7 and the when mould closes Two take-up housings 39.
Mold work process: after first allowing front template 25 and rear pattern plate 20 open one section during die sinking stop, roller 27 still in Reaching in the straight figure of slide plate 15 guide runner, meanwhile, the first latch segment 16 and the second latch segment 17 are respectively away from take-up housing 7 He The locking inclined-plane of the second take-up housing 39.
Then control injection machine oil circuit, allow the first oil motor 13 first rotate thus drive the first driving gear 14 to rotate, logical Cross First Transition gear 10 and be transferred to the first driven gear 24, thus drive and be fixed on the outside screw type on the first driven gear 24 Core 1 rotates, and now take-up housing 7 is by being connected to the elastic force of the first compression spring 9 in connecting screw behind, again by outward The thrust produced when thread core 1 and plastic external screw thread 503 demoulding, makes take-up housing 7 and passes through bearing under the effect of two power It is fixed on external screw thread core 1 entirety inside it to skid off until arriving baffle plate 8 and stopping.Wherein the focusing on due to outward of the present invention Thread core 1 is provided with the spline bosses snap on spline and the first internal thread core 2, and the length of spline and spline Boss is provided with certain stroke X, the first internal thread core 2 must be driven to rotate, and plastic is at that time when i.e. external screw thread core 1 rotates Fixed, side forces the first internal thread core 2 to produce the axial force of an abjection plastic female thread, due to external screw thread core 1 tooth is away from relatively big, and the speed of its axial demoulding is faster than internal thread core L2, so stroke X have to be larger than when the first internal thread core 2 The axial displacement difference that during abjection plastic, external screw thread core 1 and the first internal thread core 2 produce.Wherein depart from when internal thread core 2 Will not continue on rear side of plastic female thread produce axial displacement, until its spline end arrives when external screw thread core 1 continues to loose core During the spline boss of internal thread core 2, drive internal thread core 2 to continue synchronization and loose core until external screw thread core 1 completely disengages from and moulds Part.
Then control another oil circuit of injection machine makes the second oil motor 35 rotate thus drives the second driving gear 34 to rotate.By Second transition gear 33 and the 3rd transition gear 40 are transferred to two driven gears 31, thus drive the second internal thread core 4 to rotate, Now owing to being fixed on roller 27 that central core fixes on seat 30 still in the straight figure of slide plate 15 guide runner, even if in Seat 30 fixed by cardioid core, central core 5, inside casing 29, reinforcement core 3 are in stationary state, i.e. plastic remains secured to add Can not rotate and can not move axially in strong muscle core 3 and central core 5, force the second internal thread core 4 to produce an axle To knockout press, the second take-up housing 39 both by elastic force and the axial knockout press of the second internal thread core 4 of the second compression spring 32, Thus move integrally until the second take-up housing 39 arrives the position limited and stops.Die sinking the most again, front template 25 rear pattern plate 20 continue to open, and make roller 27 slide in the bevel phase of slide plate 15 guide runner, thus drive and be in interconnective center Core fixes seat 30, central core 5, inside casing 29, reinforcement core 3 entirety skid off, after also having glue position to be fixed on due to plastic On die 19, therefore central core 5 and reinforcement core 3 deviate from plastic the most accordingly.Last plastic is ejected by push rod.
The embodiment of invention described above, is not intended that limiting the scope of the present invention.Any at this Amendment, equivalent and improvement etc. done within bright spiritual principles, should be included in the claim protection of the present invention Within the scope of.

Claims (5)

1. the internal and external threads plastic part mould of a full-automatic molding band difference pitch, it is characterised in that include the outer spiral shell of molding plastic The external screw thread core of stricture of vagina, the first internal thread core of molding plastic female thread, described first internal thread core passes outside screw type Core;Being provided with spline in described external screw thread core, internal thread core is provided with the spline boss being engaged with spline;
External screw thread core external diameter is fixedly connected with the first driven gear by flat key, and the first driven gear two ends have first to slide respectively Taper roll bearing on block and the first slide pressing plate is pushed down, and the first take-up housing and the first slide pressing plate are connected solid by screw Fixed, it is achieved external screw thread core and the first driven gear are relative to the first take-up housing and the first slide pressing plate axial restraint;
Described external screw thread core is additionally operable to molding plastic groove;
Certain stroke X it is provided with between the end of the spline of described external screw thread core and the spline boss of the first internal thread core, The axle that when described stroke X have to be larger than the first internal thread core abjection plastic, external screw thread core and the first internal thread core produce To displacement difference.
The internal and external threads plastic part mould of full-automatic molding band difference pitch the most according to claim 1, it is characterised in that institute Stating external screw thread core end and inserted a tin bronze set, the external diameter of described tin bronze set endoporus and the first internal thread core slides and joins Close.
The internal and external threads plastic part mould of full-automatic molding band difference pitch the most according to claim 2, it is characterised in that when During matched moulds state, described tin bronze set endoporus bottom surface holds out against the terminal surface of the first internal thread core so that it is can not retreat;When outward After the completely disengaged product of thread core, the first internal thread core end will not completely disengage from the endoporus of tin bronze set.
The internal and external threads plastic part mould of full-automatic molding band difference pitch the most according to claim 3, it is characterised in that institute State plastic part mould and also include reinforcement core and the second internal thread core of molding plastic female thread, the institute of molding plastic reinforcement State the second internal thread core through reinforcement core.
The internal and external threads plastic part mould of full-automatic molding band difference pitch the most according to claim 4, it is characterised in that institute Stating plastic part mould and also include central core, central core participates in the straight figure of molding plastic through the second internal thread core.
CN201310304955.1A 2013-07-19 2013-07-19 A kind of internal and external threads plastic part mould of full-automatic molding band difference pitch Active CN103407075B (en)

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CN103407075B true CN103407075B (en) 2016-12-28

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105196492A (en) * 2015-09-21 2015-12-30 台州市黄岩炜大塑料机械有限公司 Synchronous revolution demolding mechanism of inner and outer double-threaded-pipe-fitting mold

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3481000A (en) * 1966-09-22 1969-12-02 Tavannes Machines Co Sa Moulding presses
CN201950303U (en) * 2011-01-20 2011-08-31 福建省长乐市华拓五金有限公司 Internal contraction type internal and external thread pitch self-adaption threading die bush of screw tap
WO2012104094A1 (en) * 2011-02-04 2012-08-09 Thomas Meister Threaded core unscrewing device
CN202846814U (en) * 2012-07-27 2013-04-03 广东联塑科技实业有限公司 Multi-directional thread demoulding structure for slide

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09323343A (en) * 1996-06-06 1997-12-16 Sekigami Seisakusho:Kk Mold

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3481000A (en) * 1966-09-22 1969-12-02 Tavannes Machines Co Sa Moulding presses
CN201950303U (en) * 2011-01-20 2011-08-31 福建省长乐市华拓五金有限公司 Internal contraction type internal and external thread pitch self-adaption threading die bush of screw tap
WO2012104094A1 (en) * 2011-02-04 2012-08-09 Thomas Meister Threaded core unscrewing device
CN202846814U (en) * 2012-07-27 2013-04-03 广东联塑科技实业有限公司 Multi-directional thread demoulding structure for slide

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