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WO1993004837A1 - Procede pour fabriquer un objet en plastique decore - Google Patents

Procede pour fabriquer un objet en plastique decore Download PDF

Info

Publication number
WO1993004837A1
WO1993004837A1 PCT/DE1992/000724 DE9200724W WO9304837A1 WO 1993004837 A1 WO1993004837 A1 WO 1993004837A1 DE 9200724 W DE9200724 W DE 9200724W WO 9304837 A1 WO9304837 A1 WO 9304837A1
Authority
WO
WIPO (PCT)
Prior art keywords
sprue
mold
plastic
plastic object
decorated
Prior art date
Application number
PCT/DE1992/000724
Other languages
German (de)
English (en)
Inventor
Michael BÖCKLEIN
Original Assignee
Leonhard Kurz Gmbh & Co.
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 Leonhard Kurz Gmbh & Co. filed Critical Leonhard Kurz Gmbh & Co.
Publication of WO1993004837A1 publication Critical patent/WO1993004837A1/fr

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
    • B29C45/38—Cutting-off equipment for sprues or ingates
    • 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
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles

Definitions

  • the invention relates to a method for producing a decorated with a decor of an embossing film
  • Plastic object wherein an embossing film is arranged between two mold halves of a mold that can be moved towards and away from one another, after which the two mold halves are moved against one another to form a mold cavity determining the plastic object and the embossing film is clamped between the two mold halves by at least one in one of the mold halves trained sprue is then injected into the mold cavity, a plastic material which then hardens to form the plastic object decorated with the embossing foil, the two mold halves are then moved apart and the
  • Plastic object is removed from the mold.
  • the film or tape being injected through the at least one sprue channel opening into the mold cavity of the corresponding mold half.
  • the at least one sprue can open into the mold cavity on an end face or base or on a narrow side.
  • Plastic objects in which the sprue is also only separated from the hardened plastic object after the plastic material has hardened. With this procedure, i.e. when the sprue is removed after the plastic material has hardened is a
  • the plastic gate which is determined by the at least one sprue channel and is connected to the plastic object, is separated from the plastic object in the mold prior to its curing.
  • the finished plastic object and the sprue separated from it can be easily removed from the mold in a time-saving manner, for example by compressed air, suitably controlled ejector pins or the like. can be done.
  • the sprue When the mold is closed, the sprue is in the uncured state of the plastic material directly at the edge of the plastic object, i.e. separated from the plastic object at the edge of the closed mold cavity, so that a burr-free plastic object advantageously results directly as a result of the shrinkage of the plastic material during its curing.
  • the two mold halves can be moved relative to one another in a plane that shears off the sprue from the plastic object and that is at least approximately perpendicular to the longitudinal direction of the sprue.
  • a method which can be carried out simply and without problems results if, in order to separate the not yet cured sprue, at least one shear element arranged in the transition area between the plastic object and the sprue or delimiting the mold cavity in the region of the sprue duct, defining a section of the corresponding sprue duct, in a shear element perpendicular to the longitudinal direction of the sprue Direction is moved relatively against the shape.
  • the two mold halves are quasi immovable, ie only evident and closable and only said shear element movable relative to the mold, in order to separate the not yet hardened sprue from the not yet hardened plastic object in the mold.
  • Two simultaneous oscillating, regrindable partial shear elements can be used for the shear element. These can be moved, for example, hydraulically or by means of a defined spring pressure in a mechanically oscillating manner.
  • the hydraulic drive of the partial shear elements can take place by means of a so-called core pull control, in which the pressure and the speed can be infinitely variable.
  • the advantages achieved with the method according to the invention are that it is not necessary to separate the sprue from the plastic object in the hardened state, that an exact separation of the sprue from the decorated plastic object is possible, that no reworking of the decorated plastic object is necessary, so that none of it conditional additional costs arise, and that a trouble-free inmold spraying process can be carried out.
  • the method according to the invention can be performed with thermoplastic. Plastics that have no glass fiber reinforcement or the like. exhibit.
  • FIG. 2 shows a schematic representation of a second embodiment of the mold for carrying out the method according to the invention
  • FIG. 3 shows a section along the section line III-III in FIG. 2,
  • FIG. 4 shows a sectional illustration similar to FIG. 3 through a mold for carrying out the method according to the invention
  • FIG. 5 shows a section along the section line V-V in FIG. 4.
  • FIG. 1 shows sections of a mold 10 with a first mold half 12 and with a second mold half 14 ⁇ which can be moved towards and away from one another in the direction of the double arrow 16 for opening and closing.
  • the two mold halves 12 and 14 are drawn in the closed operating position -in which the two mold halves 12 and 14 abut one another along a common parting plane 18 and define a mold cavity 20.
  • the cavity 20 is formed here in the first mold half 12 of the mold 10.
  • the second mold half 14 is formed with at least one sprue 22, which opens into the mold cavity 20 of the closed mold with a film or tape injection 24.
  • an embossing film 26 provided with a decor is arranged between the two mold halves 12 and 14 with the mold 10 open, after which the two mold halves 12 and 14 are formed of the mold cavity 20 are moved towards each other, the stamping film 26 being clamped between the two mold halves 12 and 14 lying in the parting plane 18 at the same time.
  • a suitable thermoplastic plastic is then injected aterially into the mold cavity 20 through the sprue 22, the decorated stamping foil 26 being simultaneously applied to the contour 28 defining the mold cavity 20 in the first mold half 12.
  • either the second mold half 14 is oscillated in the direction of the double arrow 31 along the common parting plane 18, around the not yet hardened sprue or the not yet hardened film or tape injection 24 of the sprue from the not yet hardened plastic object, without burr, or a shear element 30 is moved oscillating relative to the first and second mold halves 12, 14, which is indicated by the double arrow 32, in order to remove the not yet hardened sprue or the not yet hardened film. or tape injection 24 burr-free of the not yet hardened decorated located in the mold cavity 20
  • a mold 10 is schematically illustrated, in which the sprue 22 with the film or tape injection 24 on the end, i.e. opens into the mold cavity 20 at a base surface 32 located in the common parting plane 18.
  • a mold 10 is drawn in FIGS. 2 and 3, in which the runner 22 opens into the mold cavity 20 on a narrow surface 34.
  • the sprue channel is formed with a film or tape injection 24.
  • the mold 10 is provided with a shear element 30, that is provided in the area of film or tape injection 24 and is oriented perpendicular to the common parting plane 18 of the two mold halves 12 and 14.
  • a mold 10 is schematically illustrated in FIGS. 2 and 3, in which both the mold cavity 20 and the sprue 22 opening into it are formed in the second mold half 14. Even when such a mold 10 is used, the stamping film is clamped between the two mold halves 12 and 14 before a corresponding thermoplastic material is injected into the mold cavity 20 through the sprue 22.
  • the shear element 30 is driven in an oscillating manner, which is indicated in FIG. 3 by the double arrow 32.
  • the not yet hardened sprue on the film or tape injection 24 becomes burr-free and exactly the one that has not yet hardened
  • the shear element 30 of the mold 10 can have two partial shear elements 36, which can be hardened steel elements or steel inserts, for example.
  • the partial shear elements can be provided to be regrindable and replaceable.
  • FIG. 4 shows a section running in one plane through a mold 10 with a first mold half 12 and a second mold half 14, by means of which a mold cavity 20 is defined in the closed state.
  • the second mold half 14 is formed with a sprue 22 which opens into the mold cavity 20 when the mold 10 is closed.
  • a separating plane 18 is defined in the closed state, along which an embossing foil provided with a decoration and spanning the mold cavity 20 is clamped.
  • a plastic material that injects the mold cavity 20 is then injected into the mold cavity 20 through the sprue channel 22 completely filled out. Before the plastic material hardens .
  • a shear element 30 oriented vertically to the connecting channel 22 or to the parting plane 18 is oscillated back and forth, which is indicated in FIGS. 4 and 5 by the double arrows 32.
  • the not yet hardened sprue in the area of the film or tape injection 24 directly adjacent to the plastic object or the mold cavity 20 is separated from the not yet hardened decorated plastic object without burrs.
  • the mold 10 is opened, ie the two mold halves 12 and 14 are separated from one another and the hardened decorated plastic object is removed from the mold cavity 20 and the hardened sprue from the sprue 22.
  • the mold 10 is then available again for carrying out the process for producing a decorated plastic article using the inmold process.
  • FIG. 5 shows the device 10 or the drive for the oscillating movement of the shear element 30 or of the two partial shear elements 36.
  • the two partial shear elements 36 which define a section of the sprue channel 22 have dovetail guides 40 which are inclined at an acute angle and which are guided in a linearly movable manner in wedge guide elements 42 which are opened at an accordingly acute angle.

Landscapes

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

Abstract

Est décrit un procédé pour fabriquer un objet en plastique décoré avec un dessin d'une feuille à marquer (26), cette dernière étant disposée entre deux moitiés (12, 14) d'un moule (10), après quoi ces deux moitiés de moules (12, 14) sont rapprochées pour former une cavité (20). La feuille à marquer (26) est alors serrée fermement entre les deux moitiés de moule (12, 14). Une matière plastique est ensuite injectée dans la cavité de moule (20) à travers au moins un canal de carotte (22) formé dans le moule (10). La carotte de plastique définie par le canal de carotte (22) et adhérant à l'objet en plastique est séparée de ce dernier avant que la matière en plastique ne durcisse dans le moule. Après séparation de la carotte non encore durcie et de l'objet en plastique non encore durci, la matière plastique durcit dans le moule fermé. Le moule est ensuite ouvert et l'objet en plastique décoré fini et durci est enlevé de la cavité de moule (20) et la carotte durcie qui en est séparée est ôtée du canal de carotte (22).
PCT/DE1992/000724 1991-09-03 1992-08-28 Procede pour fabriquer un objet en plastique decore WO1993004837A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4129184.0 1991-09-03
DE4129184 1991-09-03

Publications (1)

Publication Number Publication Date
WO1993004837A1 true WO1993004837A1 (fr) 1993-03-18

Family

ID=6439707

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1992/000724 WO1993004837A1 (fr) 1991-09-03 1992-08-28 Procede pour fabriquer un objet en plastique decore

Country Status (1)

Country Link
WO (1) WO1993004837A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10221482C1 (de) * 2002-05-15 2003-09-18 Kurz Leonhard Fa Vorrichtung zum Herstellen eines abgewinkelt profilierten Formteiles, das mit einer Prägefolie dekoriert wird
RU2323098C2 (ru) * 2002-08-10 2008-04-27 Леонхард Курц Гмбх Унд Ко. Кг Частично структурированная, imd-пригодная многослойная пленка
WO2010105780A1 (fr) 2009-03-16 2010-09-23 Leonhard Kurz Stiftung & Co. Kg Dispositif et procédé de décoration de pièces en matière plastique
DE102011103824A1 (de) 2011-06-01 2012-12-06 Leonhard Kurz Stiftung & Co. Kg Fertigungseinrichtung und Verfahren zur Herstellung In-Mould-dekorierter Kunststoffformteile
WO2020157228A1 (fr) 2019-02-01 2020-08-06 Allnex Austria Gmbh Liant pour une composition de revêtement aqueuse
DE102021120955A1 (de) 2021-08-11 2023-02-16 Karl Wörwag Lack- Und Farbenfabrik Gmbh & Co. Kg Spritzgussfertigung eines Bauteils

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508299A (en) * 1967-05-24 1970-04-28 Eastman Kodak Co Automatic degating of injection molded articles
GB2124968A (en) * 1982-08-06 1984-02-29 Mouldmaking Design Centre Limi Removing sprues from mouldings
EP0299621A1 (fr) * 1987-07-17 1989-01-18 Shinkoh Sellbic Co. Ltd. Moule pour résine
EP0412493A2 (fr) * 1989-08-11 1991-02-13 Leonhard Kurz Gmbh & Co. Procédé pour fabriquer des cartes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508299A (en) * 1967-05-24 1970-04-28 Eastman Kodak Co Automatic degating of injection molded articles
GB2124968A (en) * 1982-08-06 1984-02-29 Mouldmaking Design Centre Limi Removing sprues from mouldings
EP0299621A1 (fr) * 1987-07-17 1989-01-18 Shinkoh Sellbic Co. Ltd. Moule pour résine
EP0412493A2 (fr) * 1989-08-11 1991-02-13 Leonhard Kurz Gmbh & Co. Procédé pour fabriquer des cartes

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, Band 10, Nr 118, M475, Zusammenfassung von JP 60-247532, publ 1985-12-07 *
Patent Abstracts of Japan, Band 10, Nr 191, M495, Zusammenfassung von JP 61- 35923, publ 1986-02-20 *
Patent Abstracts of Japan, Band 10, Nr 62, M460, Zusammenfassung von JP 60-208214, publ 1985-10-19 *
Patent Abstracts of Japan, Band 9, Nr 235, M415, Zusammenfassung von JP 60- 89322, publ 1985-05-20 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10221482C1 (de) * 2002-05-15 2003-09-18 Kurz Leonhard Fa Vorrichtung zum Herstellen eines abgewinkelt profilierten Formteiles, das mit einer Prägefolie dekoriert wird
RU2323098C2 (ru) * 2002-08-10 2008-04-27 Леонхард Курц Гмбх Унд Ко. Кг Частично структурированная, imd-пригодная многослойная пленка
WO2010105780A1 (fr) 2009-03-16 2010-09-23 Leonhard Kurz Stiftung & Co. Kg Dispositif et procédé de décoration de pièces en matière plastique
DE102009013065A1 (de) 2009-03-16 2010-09-30 Leonhard Kurz Stiftung & Co. Kg Vorrichtung und Verfahren zum Dekorieren von Kunststoffteilen
US10155329B2 (en) 2009-03-16 2018-12-18 Leonhard Kurz Stiftung & Co. Kg Method for decorating plastic parts
DE102011103824A1 (de) 2011-06-01 2012-12-06 Leonhard Kurz Stiftung & Co. Kg Fertigungseinrichtung und Verfahren zur Herstellung In-Mould-dekorierter Kunststoffformteile
WO2012163677A1 (fr) 2011-06-01 2012-12-06 Leonhard Kurz Stiftung & Co. Kg Dispositif de production et procédé de production de pièces moulées en plastique décorées dans le moule
DE102011103824B4 (de) 2011-06-01 2024-02-01 Leonhard Kurz Stiftung & Co. Kg Verfahren zur Herstellung In-Mould-dekorierter Kunststoffformteile
WO2020157228A1 (fr) 2019-02-01 2020-08-06 Allnex Austria Gmbh Liant pour une composition de revêtement aqueuse
DE102021120955A1 (de) 2021-08-11 2023-02-16 Karl Wörwag Lack- Und Farbenfabrik Gmbh & Co. Kg Spritzgussfertigung eines Bauteils
WO2023017071A1 (fr) 2021-08-11 2023-02-16 Karl Wörwag Lack- Und Farbenfabrik Gmbh & Co. Kg Production d'un élément par moulage par injection

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