DE19625717A1 - Process for separating the sprue from an injection molded part - Google Patents

Process for separating the sprue from an injection molded part

Info

Publication number
DE19625717A1
DE19625717A1 DE19625717A DE19625717A DE19625717A1 DE 19625717 A1 DE19625717 A1 DE 19625717A1 DE 19625717 A DE19625717 A DE 19625717A DE 19625717 A DE19625717 A DE 19625717A DE 19625717 A1 DE19625717 A1 DE 19625717A1
Authority
DE
Germany
Prior art keywords
sprue
opening
injection molded
separating
molded part
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.)
Withdrawn
Application number
DE19625717A
Other languages
German (de)
Inventor
Eric Schieberl
Peter Hillenbrand
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.)
Krauss Maffei Kunststofftechnik GmbH
Original Assignee
Krauss Maffei AG
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 Krauss Maffei AG filed Critical Krauss Maffei AG
Priority to DE19625717A priority Critical patent/DE19625717A1/en
Priority to CA002256741A priority patent/CA2256741A1/en
Priority to PCT/EP1997/003313 priority patent/WO1997049537A1/en
Priority to JP10502347A priority patent/JP2000512576A/en
Priority to EP97929280A priority patent/EP0912315A1/en
Publication of DE19625717A1 publication Critical patent/DE19625717A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0014—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form
    • G11B23/0021—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form discs
    • G11B23/0028—Details
    • G11B23/0035—Details means incorporated in the disc, e.g. hub, to enable its guiding, loading or driving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/362—Laser etching
    • B23K26/364—Laser etching for making a groove or trench, e.g. for scribing a break initiation groove
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/02—Deburring or deflashing
    • 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
    • B29C45/382—Cutting-off equipment for sprues or ingates disposed outside the mould
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0838—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacturing Optical Record Carriers (AREA)

Abstract

In order to remove the sprue (5) from an injection moulding (1) such as a delicate recording-medium disk, e-g- a CD, without producing dust and without the need for complex mechanical operations, the invention proposes that most the hole (20) in the disc is produced by injection moulding and the rest of the hole by removing the sprue from the mounding by a laser (6) once the moulding has been taken out of the mould.

Description

Die Erfindung bezieht sich auf ein Verfahren zum Abtrennen des Angusses von einem Spritzgießteil gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a method for severing the sprue of an injection molded part according to the preamble of claim 1.

Nach DE 35 26 632 C2 ist das Abtrennen und Entfernen des Angusses von einer Informationsträgerscheibe bekannt. Das hierbei verwendete Spritz­ gießwerkzeug ist so gestaltet, daß bei entsprechender Ausbildung des gesamten Spritzgießkörpers der Anguß innerhalb des Werkzeugs nach dem Spritzgießvorgang durch Abreißen getrennt und anschließend aus dem Werkzeug abgeführt werden kann. Ähnlich sind die Vorgänge beim Stanz­ werkzeug. Hierbei wird der Anguß durch Stanzen vom Spritzgießkörper getrennt und dieser nach erfolgtem öffnen des Werkzeugs durch eine Entnahmevorrichtung entnommen.According to DE 35 26 632 C2 the separation and removal of the sprue from an information carrier disk known. The spray used here Casting tool is designed so that with appropriate training of entire injection molding the sprue inside the mold after the Injection molding process separated by tearing and then from the Tool can be removed. The processes for punching are similar Tool. The sprue is stamped from the injection molding separated and this after opening the tool by a Removed device.

Um die bei Informationsträgerscheiben aufgrund ihrer Hochempfindlichkeit verlangte Staubfreiheit sowie Produktionssicherheit zu gewährleisten, erfordern diese Verfahren einen sehr hohen technischen und mechanischen Aufwand.In the case of information carrier discs due to their high sensitivity to ensure the required freedom from dust and production security, these processes require a very high technical and mechanical Expenditure.

Der Erfindung liegt daher die Aufgabe zugrunde, bei einem Spritzgießteil wie einer hochempfindlichen Informationsträgerscheibe, z. B. einer CD, das Angußteil bei geringem mechanischen Aufwand staubfrei zu entfernen.The invention is therefore based on the object in an injection molded part such as a highly sensitive information carrier disc, e.g. B. a CD, remove the sprue part dust-free with little mechanical effort.

Diese Aufgabe wird gemäß den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved in accordance with the features of patent claim 1.

Nachdem die endgültige Bohrungsherstellung erfindungsgemäß erst nach dem Spritzgießprozeß außerhalb des Werkzeugs erfolgt, ergibt sich ein einfacher modularer Werkzeugaufbau, der nur minimale Werkzeugbewegungen für die Entformung der CD erfordert, insbesondere dann, wenn in vorteil­ hafter Ausbildung der Erfindung mittels Heißkanal eine Angußminimierung erfolgt.After the final drilling according to the invention only after Injection molding process takes place outside the mold, results in a simple modular tool structure, which only minimal tool movements required for demoulding the CD, especially if it is advantageous Guter embodiment of the invention by means of a hot runner, a sprue minimization he follows.

Gegenüber dem eingangs angegebenen Verfahren ist gemäß der Erfindung erheblich weniger verschleißgefährdende Mechanik im Auswerferbereich erforderlich. Durch die Verwendung eines Lasers für das Angußabtrennen wird eine präzise Schnittkante bei absoluter Staubfreiheit erzielt. Compared to the method specified at the outset is according to the invention considerably less wear-prone mechanics in the ejector area required. By using a laser for gate cutting a precise cutting edge is achieved with absolute freedom from dust.  

Die präzise Schnittkante eines Lasers ermöglicht außerdem eine Vergrößerung des Anspritzspaltes zwischen Anguß und Formteil. Dadurch ergibt sich eine bessere und schnellere Einflußnahme auf die Formteilqualität, und zwarThe precise cutting edge of a laser also enables enlargement the injection gap between the sprue and molded part. This gives better and faster influence on the part quality, in fact

  • - eine bessere Pit-Abformung über den gesamten Informationsbereich der CD,- a better pit impression over the entire information area of the CD,
  • - geringerer Druckverlust,- less pressure loss,
  • - geringere Scherung des Materials im Anspritzspalt,- lower shear of the material in the injection gap,
  • - geringere Spannungen im Formteil.- lower tensions in the molded part.

Weitere vorteilhafte Ausbildungen der Erfindung sind in den Unteransprü­ chen angegeben. So kann die Position des scheibenförmigen Angusses im Öffnungsbereich frei gewählt werden, d. h. die Anbindung des Angußteils an die CD kann auf der Spiegelseite, im Mittenbereich oder auf der Informationsseite erfolgen. Bei Anordnung des Angußteils im Mittenbereich kann die Abtrennung mittels Lasers vorteilhaft derart erfolgen, daß an den Oberflächen der Scheibe kein Grat entstehen kann und lediglich in der Öffnungsmitte eine minimale Vertiefung bzw. Rille durch den Laser erzeugt wird, welche auf die erforderliche genaue Zentrierung der Scheibe keinerlei schädlichen Einfluß hat.Further advantageous developments of the invention are in the dependent claims Chen specified. The position of the disk-shaped sprue in the Free choice of opening area, d. H. the connection of the sprue on the CD can be on the mirror side, in the middle or on the Information page. When arranging the sprue in the middle can advantageously be separated by means of a laser in such a way that no burrs can appear on the surfaces of the pane and only in a minimal indentation or groove by the laser in the center of the opening is generated, which on the required exact centering of the Disc has no harmful influence.

Ein weiterer Vorteil des erfindungsgemäßen Verfahrens ergibt sich hinsichtlich-des Lackauftrages auf den Datenträger. So kann bei einer informationsseitigen Anordnung des Angußteils die Informationsseite des Datenträgers absolut plan gestaltet werden. Dadurch ist ein zentrischer Lackauftrag bei optimaler Lackverteilung möglich.Another advantage of the method according to the invention results with regard to the paint application on the data carrier. So with one information side arrangement of the sprue part the information side of the Disk absolutely flat. This makes it more centric Paint application possible with optimal paint distribution.

In der Zeichnung sind Ausführungsbeispiele der Erfindung schematisch dargestellt. Es zeigen: In the drawing, exemplary embodiments of the invention are schematic shown. Show it:  

Fig. 1 einen Datenträger 1 und ein Angußteil 2 mit Anbindung an der Spiegelseite 3 und eine Öffnung 20 sowie einen Stapelwulst 4 und einem Heißkanalansatz 5. Für die Abtrennung des Angußteils 2 sind alternativ Laser 6 und 7 angeordnet, Fig. 1 shows a data carrier 1 and a sprue part 2 with a connection to the mirror side 3 and an opening 20 and a Stapelwulst 4 and a hot runner extension piece 5. Alternatively, lasers 6 and 7 are arranged for the separation of the sprue part 2 ,

Fig. 2 einen Datenträger 8 und Angußteil 9 mit Anbindung an der Infor­ mationsseite 10 und eine Öffnung 21 sowie einen Stapelwulst 11. Zur Abtrennung des Angußteils 9 sind Laser 12 und 13 vorgesehen, Fig. 2 shows a disk gate portion 8 and 9 with connection to the infor mationsseite 10 and an opening 21 and a Stapelwulst. 11 Lasers 12 and 13 are provided to separate the sprue part 9 ,

Fig. 3 einen Datenträger 14 und Angußteil 15 in einer Öffnung 22 mit An­ fasungen 16 sowie einem Stapelwulst 17 auf der Spiegelseite 18, wobei zur Abtrennung des Angußteils 15 ein Laser 19 angeordnet ist, Fig. 3 shows a data carrier 14 and gate portion 15 in an opening 22 with at chamfers 16 and a Stapelwulst 17 on the mirror side 18, wherein for separating the gate portion 15, a laser 19 is arranged,

Fig. 4 den vergrößerten Teilquerschnitt eines Spritzgießteils 23 mit einem angebundenen Angußteil 24 und dem spritzgegossen Teil einer Öffnung 25, einem überstehenden Teil 24a des Angußteils 24 und einer Trennkante 26. Fig. 4 shows the enlarged partial cross section of an injection-molded article 23 with a sprue part 24 and connected to the injection molded part of an opening 25, a protruding part 24 a of the gate portion 24 and a separating edge 26.

Claims (6)

1. Verfahren zum Abtrennen des Angusses von einem Spritzgießteil, insbesondere von einer Informationsträgerscheibe, wobei das Angußteil nach dem Spritzgieß- und Abkühlvorgang mit dem Spritzgießteil einstü­ ckig verbunden ist und durch anschließendes Abtrennen des Angußteils von dem Spritzgießteil in diesem eine entsprechende Öffnung erzeugt wird, dadurch gekennzeichnet, daß die Öffnung (20-22, 25) zum überwiegenden Teil ihrer axialen Erstreckung bzw. der Scheibendicke durch Spritzgießen hergestellt wird und das Abtrennen des Angußteils (2, 9, 15, 24) vom Spritzgießteil (1, 8, 14, 23) im Bereich des restlichen Teils der axialen Erstreckung der Öffnung (20-22, 25) außerhalb des Spritzgießwerkzeugs mittels eines Lasers (6, 7, 12, 13, 19) erfolgt.1. A method for separating the sprue from an injection molded part, in particular from an information carrier disc, wherein the sprue part is integrally connected to the injection molded part after the injection molding and cooling process and a corresponding opening is generated in the injection molded part by subsequently separating the sprue part, thereby characterized in that the opening ( 20-22 , 25 ) for the most part of its axial extension or the pane thickness is produced by injection molding and the separation of the sprue part ( 2 , 9 , 15 , 24 ) from the injection molding part ( 1 , 8 , 14 , 23 ) in the area of the remaining part of the axial extent of the opening ( 20-22 , 25 ) outside the injection mold using a laser ( 6 , 7 , 12 , 13 , 19 ). 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der restliche, abzutrennende Teil der axialen Erstreckung der Öffnung (20, 21, 25) am Rand einer Informationsträgerscheibe (1, 8) angeordnet ist.2. The method according to claim 1, characterized in that the remaining part of the axial extension of the opening ( 20 , 21 , 25 ) to be separated is arranged on the edge of an information carrier disc ( 1 , 8 ). 3. Verfahren nach Anspruch 1 und 2, dadurch gekennzeichnet, daß der restliche Teil der axialen Erstreckung der Öffnung (25) durch axiale Versetzung des Angußteils (24) nach außen bzw. über den Scheibenrand hinaus überstehend gebildet ist.3. The method according to claim 1 and 2, characterized in that the remaining part of the axial extent of the opening ( 25 ) is formed by axially displacing the sprue ( 24 ) to the outside or beyond the edge of the pane beyond. 4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die axiale Versetzung und der Durchmesser des überstehenden Teiles (24a) des Angußteils (24) so gewählt sind, daß beim Abtrennen des Angußteils (24) von dem Spritzgießteil (23) eine im Winkel von 45° zur Ebene der Öffnung (25) geneigte Trennkante (26) entsteht. 4. The method according to claim 3, characterized in that the axial displacement and the diameter of the projecting part ( 24 a) of the sprue part ( 24 ) are selected so that when the sprue part ( 24 ) is separated from the injection molded part ( 23 ) one at an angle Separating edge ( 26 ) inclined at 45 ° to the plane of the opening ( 25 ). 5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der restliche, abzutrennende Teil der axialen Erstreckung der Öffnung (22) in deren mittigen Bereich angeordnet ist.5. The method according to claim 1, characterized in that the remaining part of the axial extension of the opening ( 22 ) to be separated is arranged in the central region thereof. 6. Verfahren nach den Ansprüchen 1 bis 5 oder einem derselben, dadurch gekennzeichnet, daß der Anguß mittels Heißkanal erfolgt.6. The method according to claims 1 to 5 or one of the same, characterized in that the sprue is carried out by means of a hot runner.
DE19625717A 1996-06-27 1996-06-27 Process for separating the sprue from an injection molded part Withdrawn DE19625717A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19625717A DE19625717A1 (en) 1996-06-27 1996-06-27 Process for separating the sprue from an injection molded part
CA002256741A CA2256741A1 (en) 1996-06-27 1997-06-24 Method of removing the sprue from an injection moulding
PCT/EP1997/003313 WO1997049537A1 (en) 1996-06-27 1997-06-24 Method of removing the sprue from an injection moulding
JP10502347A JP2000512576A (en) 1996-06-27 1997-06-24 How to separate sprue from injection molded parts
EP97929280A EP0912315A1 (en) 1996-06-27 1997-06-24 Method of removing the sprue from an injection moulding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19625717A DE19625717A1 (en) 1996-06-27 1996-06-27 Process for separating the sprue from an injection molded part

Publications (1)

Publication Number Publication Date
DE19625717A1 true DE19625717A1 (en) 1998-01-02

Family

ID=7798157

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19625717A Withdrawn DE19625717A1 (en) 1996-06-27 1996-06-27 Process for separating the sprue from an injection molded part

Country Status (5)

Country Link
EP (1) EP0912315A1 (en)
JP (1) JP2000512576A (en)
CA (1) CA2256741A1 (en)
DE (1) DE19625717A1 (en)
WO (1) WO1997049537A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19842899A1 (en) * 1998-09-18 2000-03-30 Roehm Gmbh Mold for injection- molding or pressing of e.g. DVD blanks takes advantage of improved optical properties of polymethacrylate plastic and overcomes separation debris problem by designed, thin central section tearing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4535223A (en) * 1983-10-24 1985-08-13 Rca Corporation Apparatus for use in trimming molded records
DE3526632C2 (en) * 1985-07-25 1990-02-01 Krauss-Maffei Ag, 8000 Muenchen, De

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63203308A (en) * 1987-02-20 1988-08-23 Daicel Chem Ind Ltd Method for forming central hole of disk
JPS6453788A (en) * 1987-08-20 1989-03-01 Seidensha Electronics Laser beam cutting method for digital disk
JPH0341642A (en) * 1989-07-10 1991-02-22 Canon Inc Production of optical recording medium
DE4403169A1 (en) * 1994-02-02 1995-08-10 Warner Music Mfg Europa Gmbh Process for making center holes in CD's
JPH07276508A (en) * 1994-04-05 1995-10-24 Shinozaki Seisakusho:Kk Method for boring fine hole on polymer resin material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4535223A (en) * 1983-10-24 1985-08-13 Rca Corporation Apparatus for use in trimming molded records
DE3526632C2 (en) * 1985-07-25 1990-02-01 Krauss-Maffei Ag, 8000 Muenchen, De

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BÜTJE,Rolf: Optimal mit angepaßten Strahlquellen und Prozeßparametern. In: Technische Rundschau, 31/91, S.32-38 *
JP 4-45908 A.,In: Patents Abstracts of Japan, M-1255,May 27,1992,Vol.16,No.229 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19842899A1 (en) * 1998-09-18 2000-03-30 Roehm Gmbh Mold for injection- molding or pressing of e.g. DVD blanks takes advantage of improved optical properties of polymethacrylate plastic and overcomes separation debris problem by designed, thin central section tearing
DE19842899C2 (en) * 1998-09-18 2002-04-25 Roehm Gmbh Molding tool for blank information disc

Also Published As

Publication number Publication date
CA2256741A1 (en) 1997-12-31
WO1997049537A1 (en) 1997-12-31
EP0912315A1 (en) 1999-05-06
JP2000512576A (en) 2000-09-26

Similar Documents

Publication Publication Date Title
EP0210475B1 (en) Method and apparatus for manufacturing an injection-moulded object
DE60004540T2 (en) METHOD AND DEVICE FOR PRODUCING A PLASTIC PRODUCT
DE3839536C2 (en) Injection molding device for information plates and injection molding processes
EP0181590B1 (en) Method and apparatus for punching and removing the sprue in an injection mould
EP0100422B1 (en) Injection mould
AT390030B (en) INJECTION MOLD FOR THE PRODUCTION OF INFORMATION CARRIER PLATES
DE102004036171A1 (en) Method and device for producing a decorative trim part with a freed symbol
DE68918623T2 (en) Process and manufacture of a formatted substrate for an optical disk and injection mold for its use.
DE2755499C3 (en) Process for the production of molds for spectacle frames
DE3444532C2 (en) Multi-part injection mold
DE19625717A1 (en) Process for separating the sprue from an injection molded part
DE4302384A1 (en) Compact disk and CD-ROM disc mfg. process - using injection moulding process with matrix having centre hole and information signal surface
EP2251175A2 (en) Cuboid bottle crate, tool and method for producing same
WO1997049537A9 (en) Method of removing the sprue from an injection moulding
DE19736082C1 (en) Method and manufacture of a chip card and device for carrying out the method
EP0761406A1 (en) Apparatus for producing a thermoplastic-silicone composite injection moulded article
EP2714361B1 (en) Process and device for production of film decorated plastic parts with through holes or deep recesses with imd-injection
EP1188538A2 (en) Method and injection mould for moulding a plastic object, in particular a mudguard and trim panels for motor vehicles
DE102008035728B4 (en) Method and device for producing a coated component
EP3222399A1 (en) Device and method for producing a press-moulded part having at least one perforation
EP1338398A1 (en) Apparatus for multicomponent moulding of plastic parts
EP1358992A1 (en) Injection mould for producing a chip card as well as method for producing a chip card
DE19842899C2 (en) Molding tool for blank information disc
DE4228655A1 (en) Decorative faced sprue-free moulding - produced by placing embossed film across mould, closing it, injecting thermoplastic shot behind film and oscillating to break off sprue
DE102020008063A1 (en) Molded part and method of making such a molded part

Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8127 New person/name/address of the applicant

Owner name: KRAUSS-MAFFEI KUNSTSTOFFTECHNIK GMBH, 80997 MUENCH

8130 Withdrawal