WO2020233861A1 - Moule d'injection comprenant une glissière - Google Patents

Moule d'injection comprenant une glissière Download PDF

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Publication number
WO2020233861A1
WO2020233861A1 PCT/EP2020/057237 EP2020057237W WO2020233861A1 WO 2020233861 A1 WO2020233861 A1 WO 2020233861A1 EP 2020057237 W EP2020057237 W EP 2020057237W WO 2020233861 A1 WO2020233861 A1 WO 2020233861A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
slide
injection mold
piston
injection
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.)
Ceased
Application number
PCT/EP2020/057237
Other languages
English (en)
Inventor
Rainer Armbruster
Stefan SCHMALZ
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.)
Foboha GmbH
Foboha Germany GmbH
Original Assignee
Foboha GmbH
Foboha Germany GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Foboha GmbH, Foboha Germany GmbH filed Critical Foboha GmbH
Publication of WO2020233861A1 publication Critical patent/WO2020233861A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B29C45/26—Moulds
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • B29C45/332—Mountings or guides therefor; Drives therefor
    • 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
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • 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
    • B29C45/26—Moulds
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • B29C2045/338—Mould parts with combined axial and transversal movements

Definitions

  • the present invention relates to an injection mold comprising at least one slide.
  • Injection molds with one or more slides are known since long as slides are necessary to demold parts having undercuts in a demolding direction.
  • the slides are therefore arranged at least partially movable sideways with respect to the general demolding direction.
  • the slides can be arranged such that they are at least partially moveable in the direction of demolding. From the prior art slides and means to actuate the slides are known.
  • EP0061 072A2 was first published in December 1 982 on behalf of Maschinenfab- rik Koeppern GmbH und Co. KG. It is directed to an injection mold for moldings in the form of crates, in particular bottle crates, is designed such that the mold jaws which, in the closed position, meet each other at the corners at half the corner angle are displaceable on the inclined guide pins, of which in each case one is arranged in the plane of the meeting join of two neighboring mold jaws, inclined by an angle resulting from the angles of movement of the mold jaws. Guided on the guide pins in each case is a follower, which is in engagement with the mold jaws.
  • the follower has lateral guide lugs, which engage in perpendicular grooves in the end faces of the mold jaws, which extend perpendicularly to the plane of inclination of the guide pin.
  • the ejector frame is penetrated by at least two guide pins, which are fastened in one of the two mold halves and by which the said mold half is guided relative to the other mold half in the opening direction.
  • the bush is provided with stops, the effective spacing of which is chosen such that, during opening of the mold, the ejector frame is taken along as soon as an opening stroke required for ejecting the molding has been reached.
  • US20080791 97A was first published in July 2006 on behalf of ECIM Technologies BV. It is directed to a method for manufacturing products using a mold having at least one mold cavity which is at least partly defined by at least two movable wall parts. When the mold is closed, at least two movable wall parts are brought to a retracted position relative to the mold cavity, so that the volume of the mold cavity is enlarged relative to the volume required for a product to be formed. At least partly molten material is introduced into the mold cavity and then in a first step a first one of the at least two movable wall parts is set into motion in the direction of a forwardly moved position.
  • a second one of the at least two mov- able wall parts is set into motion in the direction of a forwardly moved position, wherein the movable wall parts are moved into said forwardly moved position for the formation of the product.
  • an operating means comprising a piston-cylinder assembly with a piston rod having a longitudinal axis extending parallel to the third direction.
  • the piston rod can move in the direction of the longitudinal axis, and hence in the third direction, driven by the piston-cylinder assembly, for instance hydraulically, pneumatically or electri- cally.
  • US201 3071 51 2A was first published in February 201 1 on behalf of Irumold SL. It describes an opening device with slides in molds to extract the molded parts.
  • the cavity is formed by mobile parts that can be removed to release the molded parts.
  • the cavity of the molds is formed by slides that are installed on the corresponding holders that are fixed to the corresponding racks connected among them through a connection element, preferably a gear, and that are simultaneously activated with a driving element.
  • the actuators are arranged outside of the mold.
  • CN20521 9628U was first published in February 201 6 on behalf of Hongli Tech nology Suzhou Co Ltd. It describes a hydraulic drive mechanism in an injection mold.
  • the cylinder body set up in the mold inside and with mold formula structure as an organic whole.
  • the upper end of cylinder body is provided with a slider, the inclined hole that the cross section is the rectangle is arranged at the rear portion of a slider.
  • CN 1 06994770A was first published in August 201 7 on behalf Mou Weijun. It is directed to a die mechanism capable of realizing core-pulling by adopting angle lifters combined with pneumatic cylinders.
  • the die mechanism comprises a fixed die and a moving die, wherein a sprue bush is mounted in a fixed clamping plate.
  • a mold cavity of a molding product is formed in a fixed mold plate.
  • Pneumatic cylin ders are fixed on the support plate through pneumatic cylinder connecting plates.
  • the pneumatic cylinder pistons are in T-shaped concave-convex connection with sliding blocks in a sliding manner.
  • the invention is directed to injection molds having an improved mold design com prising one or several slides or group of slides and thereto related actuators, which are having a compact design. At least one actuator is at least partially integrated in the slide or attached to it from the outside. The slide and the at least one thereto interconnected actuator are forming a very efficient unit.
  • the design offers the op portunity, that the actuator is accessible from the outside. Thereby monitoring and maintenance becomes possible without major disassembly of the mold. Further more, the actuators allow to actuate the at least one slide linearly in a separation plane or at an angle thereto.
  • An injection mold according to the invention preferably comprises a first mold half and a during production thereto in a first direction between an open and a closed position relatively to the first mold half movable second mold half.
  • the first and the second mold halves are forming in the closed position at least one cavity there be- tween.
  • the at least one cavity is suitable to receive melted plastic material to form a plastic part thereof.
  • At least one of the first and/or the second mold half comprises at least one slide arranged movable with respect to a mold plate of the respective mold half.
  • At least one linear drive is preferably arranged at least partially inside the slide or attached thereto to actuate the slide with respect to the respective mold plate at least in one direction.
  • the at least one linear drive is preferably used during opening of the mold, respec tively opening of the at least one slide interconnected thereto. Closing of the at least one slide can be achieved by the at least one linear drive and/or e.g. by interaction with the opposite mold half.
  • the mold may comprise a coordination means which coordinates the at least one slide with respect to the opposite mold half, especially during closing of the mold as described in more detail hereinafter.
  • Good results can be achieved by a coordination mechanism which coordinates the movement of the slides and the opposite mold half at least during closing of the injection mold.
  • the coordina tion mechanism can prevent misalignment especially in case when the slides can be actuated individually.
  • the coordination mechanism com prises a first coordination means arranged here and protruding from the second mold half.
  • the first coordination means has a T-shaped protrusion which during closing of the injection mold interacts with therefore foreseen second coordination means in the form of notches arranged at each slide.
  • the coordination mechanism prevents damage to the injection mold, namely in the situation when the injection mold tries to be closed when the slides are already in a closed position, as in this position the cores can usually not be inserted between the slides. If appropriate electrical sensors (not shown in detail) can be foreseen to detect misalignment of the involved mold parts.
  • the linear drive preferably comprises a pneumatic and/or hydraulic cylinder com prising a piston which is arranged in a bore of a piston housing.
  • the piston is pref erably interconnected directly or indirectly by a piston rod to the respective mold plate to displace the slide with respect to the respective mold plate in at least one direction.
  • the piston rod may comprise a bore extending in longitudinal direction of the piston rod and forming part of a feed pipe by which a working chamber is supplied with a working fluid.
  • the active elements of the linear drive, in the present variation, the working chamber and the piston are preferably arranged at least partially inside of the respective slide.
  • the housing of the piston usually has a tubu- lar shape and is arranged at least partially inside the slide and/or is integrated as such into the slide forming part thereof.
  • each linear drive can be sealed off by a closure which is, with respect to the piston, arranged opposite to the piston rod.
  • the piston becomes accessible by removing the closure.
  • the piston rod may comprise a bolt which is accessible from the working chamber, i.e. when the clo sure is removed, the bolt can be detached and the piston and if appropriate the piston rod can be removed.
  • the feed pipe is arranged inside the bolt.
  • the slide is movably supported with respect to a mold plate by at least one linear bearing.
  • the linear bearing usually comprises a first and a second sliding face which are arranged adjacent to each other interacting during operation, such that the slide moves in the appropriate direction.
  • the linear bearing (respec tively its working direction) extends parallel to the linear drive.
  • other bearings may be appropriate such that the slide is moving at least partially on a curved path.
  • At least one linear drive is arranged adjacent to at least one linear bearing.
  • at least one linear bearing for movably supporting a slide is interconnected to the respective mold plate via a support.
  • the support can protrude above the mold plate allowing movements at an angle between 0° (in plane) up to 90° (perpendicular) to the general extension of the respective mold plate.
  • non-linear movements can be realized by an appropriate choice of the bearings or a combination of several bearings.
  • several bearings may be interconnected to the same support, e.g. at two opposite sides.
  • at last one linear drive may be arranged in the slide horizontally behind a segment of a cavity. Good results can be achieved when at least two linear drives are interconnected to the slide spaced apart from each other.
  • FIG. 3 Several cavities of the injection mold according to Figure 1 ;
  • Fig. 4 Details of a slide according to the injection mold of Figure 1 .
  • Figure 1 shows an injection mold 1 in a perspective view from the front and above in an open position.
  • Figure 2 is showing detail D according to Figure 1 in a magni fied view.
  • Figure 3 is showing details of the injection mold 1 according to Figure 1 .
  • Figure 4 is showing a slide 7 according to Figure 1 in perspective and partially sec tioned view.
  • an injection mold 1 comprises a first mold half 2 and a thereto in a first direction x, during production between an open and a closed po sition, relatively to the first mold half 2 movable second mold half 4.
  • the injection mold 1 is shown in an open position.
  • the second mold half 4 is shown 90° rotated with respect to the first mold half 2, such that the inside of both mold faces along a separation plane 23 becomes visible.
  • the relative position of the first and the second mold half 2, 4 as shown in Figure 1 does not correspond to the normal open position as it would be during production and is for explanatory purposes only. Closing of the injection mold 1 is schematically indicated by dotted first lines L1 .
  • the first mold half 2 comprises concave wall segments 1 7 (see Figure 2 ) arranged between slides 7.
  • cores 1 9 arranged at and protruding from the second mold half 4 are arranged in the concave wall segments 1 7 forming cavities 6.
  • Figure 3 is showing details of the injection mold 1 according to Figure 1 in a mag nified view.
  • Cavities 6 are formed between a first slide 7 and a thereto (y-direction) opposite second slide 7, which in the shown variation are arranged movable with respect to the mold plate 3 (see Figure 1 ) of the first mold half 2.
  • the relative mov- ing direction and the movement of the slides 7 with respect to the mold plate 2 are for each slide schematically indicated by second lines L2. They are arranged at a first angle a1 , respective a second angle a2 with respect to the general opening direction (x-direction) of the injection mold 1 .
  • the first and the second angle ⁇ x1 , a2 are usually the same.
  • angles cc1 , a2 are preferably within the range of 0° (parallel to general opening direction of injection mold 1 ) to 90° (perpendic ular to general opening direction of injection mold 1 ).
  • the slides 7 each comprise several wall segments 1 7 which in the closed position of the injection mold 1 in combination with a respective core 1 9 form a cavity 6 suitable to receive liquefied plastic material to form a part there from.
  • several wall segments 1 7 and thereto related cores 1 9 are arranged next to each other (z-direction) to form several cavities 6 simultaneously.
  • the slides 7 are beam-shaped and comprise each two linear drives 8 arranged close to the end of the respective slide 7.
  • the linear drives 8 are preferably arranged inside the slide 7.
  • the linear drives 8 are foreseen to actuate the thereto interconnected slide 7 with respect to the respective mold plate 3 at least during opening of the mold.
  • the linear drive 8 comprises a pneumatic cylinder 8. De pending on the field of application, alternatively or in addition the linear drive 8 may comprise a hydraulic cylinder.
  • the pneumatic cylinder 8 comprises a piston 9 which is arranged in a bore 1 0 of a housing 1 1 (piston hous ing).
  • the piston 9 is interconnected by a piston rod 1 1 directly or indirectly to the respective mold plate 3 to displace the slide 7 with respect to the respective mold plate 3.
  • the piston rod 1 1 comprises a bore 1 3 extending in longi tudinal direction of the piston rod 1 1 .
  • the bore 1 3 is forming part of a feed pipe 1 3 by which a working chamber 1 4 is supplied with a working fluid (not shown in de tail).
  • the housing 1 1 of the piston 9 preferably has a tubular shape and is arranged at least partially inside the slide 7 and/or is integrated into the slide 7 forming part thereof.
  • the piston 9 normally has a circular cross-section. However, e.g. in the situation of very narrow space the piston 9 may have an oblong cross section ex tending in a length direction of the respective slide 7.
  • the working chamber 1 4 is sealed off by a closure 1 5 ar- ranged with respect to the piston 9, opposite to the piston rod 1 2.
  • the piston rod 1 2 may be attached by a bolt 20.
  • the feed pipe 1 3 (bore) is arranged inside the bolt 20.
  • the slides 7 are movably supported with respect to the respective mold plate 3 by linear bearings 1 6.
  • the linear bearings 1 6 of the shown variation comprise several first sliding surfaces 21 arranged at the slide 7 and corresponding second sliding surfaces 22 arranged at the mold plate 3, and/or the support 1 8 for the slide 7.
  • first and the second sliding surfaces 21 , 22 of the linear bearings 1 6 extend adjacent to each other and parallel to the linear drive 8.
  • at least one linear drive 8 is arranged adjacent to at least one linear bearing 1 6.
  • At least one linear bearing 1 6 is interconnected to the mold plate 3 via a support 1 8.
  • the supports 1 8 of the present embodiment protrudes above the mold plate 3, 5.
  • Linear bearings 1 6 are interconnected to the support 1 8 at two opposite sides.
  • at least one linear drive 8 is arranged in the slide 7 behind a segment 1 7 of a cavity 6.
  • At least two linear drives 8 are interconnected to the slide 7 spaced apart from each other.
  • several groups of supports 1 8 and thereto intercon nected slides 7 can be arranged in at least one column and at least one row.
  • the injection mold 1 e.g. comprises four columns each with two rows of slides 7 arranged in pairs, forming thirty-two cavities 6.
  • a coordination mechanism can be foreseen to coordinate the move- ment of the slides 7 at least during closing of the injection mold 1 .
  • the coordination mechanism can prevent misalignment in case the slides are actuated individually.
  • the coordination mechanism comprises a first coordination means 24 arranged here and protruding from the second mold half 4.
  • the first co ordination means has a T-shaped protrusion 24 which during closing of the injec- tion mold 1 interacts with therefore foreseen second coordination means in the form of notches 25 arranged at each slide 7.
  • the coordination mechanism prevents damage to the injection mold, namely in the situation when the injection mold 1 tries to be closed when the slides 7 are already in a closed position, as in this posi tion the cores 1 9 can usually not be inserted between the slides 7. If appropriate electrical sensors (not shown in detail) can be foreseen to detect misalignment of the involved mold parts.
  • Mold plate (first mold half) 1 8 Support (slide / linear bearing)

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un moule d'injection (1) comprenant une première moitié de moule (2) et une seconde moitié de moule mobile (4) dans une première direction (x) entre une position ouverte et une position fermée par rapport à la première moitié de moule (2), formant, dans une position fermée, au moins une cavité (6) entre ces dernières, appropriée pour recevoir un matériau plastique fondu. Au moins l'une des première et/ou seconde moitiés de moule (2, 4) comprend une glissière (7) disposée mobile par rapport à une plaque de moule (3, 5) de la moitié de moule respective (2, 4). Au moins un entraînement linéaire (8) est disposé au moins partiellement dans la glissière (7) pour actionner la glissière (7) par rapport à la plaque de moule respective (3, 5).
PCT/EP2020/057237 2019-05-20 2020-03-17 Moule d'injection comprenant une glissière Ceased WO2020233861A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00652/19 2019-05-20
CH6522019 2019-05-20

Publications (1)

Publication Number Publication Date
WO2020233861A1 true WO2020233861A1 (fr) 2020-11-26

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Family Applications (1)

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PCT/EP2020/057237 Ceased WO2020233861A1 (fr) 2019-05-20 2020-03-17 Moule d'injection comprenant une glissière

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Country Link
WO (1) WO2020233861A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116118122A (zh) * 2022-12-27 2023-05-16 江苏朗佑精密部件制造有限公司 一种塑形滑块运动机构及双塑成型模具

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061072A2 (fr) 1981-03-21 1982-09-29 Maschinenfabrik Köppern GmbH. & Co. KG Moule d'injection
JPH11198192A (ja) * 1998-01-07 1999-07-27 Sekisui Chem Co Ltd 射出成形用金型
US20080079197A1 (en) 2004-12-28 2008-04-03 Hoogland Hendricus A Method And Apparatus For Manufacturing Products
KR20110008317U (ko) * 2010-02-19 2011-08-25 구미에이테크솔루션주식회사 소형 제품 언더컷 처리용 금형장치
KR101156196B1 (ko) * 2011-12-05 2012-06-18 (주)현태금형 사출 금형장치
US20130071512A1 (en) 2010-06-11 2013-03-21 Irumold S.L. Opening device of slides in moulds for the ejection of moulded parts
CN204322365U (zh) * 2014-09-04 2015-05-13 青岛英联精密模具有限公司 一种模具内置油缸管结构
CN205219628U (zh) 2015-11-25 2016-05-11 宏利科技(苏州)有限公司 一种注塑模具模内液压驱动机构
CN106994770A (zh) 2016-01-24 2017-08-01 牟维军 斜顶与气压缸组合抽芯的模具机构

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061072A2 (fr) 1981-03-21 1982-09-29 Maschinenfabrik Köppern GmbH. & Co. KG Moule d'injection
JPH11198192A (ja) * 1998-01-07 1999-07-27 Sekisui Chem Co Ltd 射出成形用金型
US20080079197A1 (en) 2004-12-28 2008-04-03 Hoogland Hendricus A Method And Apparatus For Manufacturing Products
KR20110008317U (ko) * 2010-02-19 2011-08-25 구미에이테크솔루션주식회사 소형 제품 언더컷 처리용 금형장치
US20130071512A1 (en) 2010-06-11 2013-03-21 Irumold S.L. Opening device of slides in moulds for the ejection of moulded parts
KR101156196B1 (ko) * 2011-12-05 2012-06-18 (주)현태금형 사출 금형장치
CN204322365U (zh) * 2014-09-04 2015-05-13 青岛英联精密模具有限公司 一种模具内置油缸管结构
CN205219628U (zh) 2015-11-25 2016-05-11 宏利科技(苏州)有限公司 一种注塑模具模内液压驱动机构
CN106994770A (zh) 2016-01-24 2017-08-01 牟维军 斜顶与气压缸组合抽芯的模具机构

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116118122A (zh) * 2022-12-27 2023-05-16 江苏朗佑精密部件制造有限公司 一种塑形滑块运动机构及双塑成型模具
CN116118122B (zh) * 2022-12-27 2023-08-11 江苏朗佑精密部件制造有限公司 一种塑形滑块运动机构及双塑成型模具

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