DE2639118C2 - Press die for the production of film or plate-shaped information carriers - Google Patents

Press die for the production of film or plate-shaped information carriers

Info

Publication number
DE2639118C2
DE2639118C2 DE19762639118 DE2639118A DE2639118C2 DE 2639118 C2 DE2639118 C2 DE 2639118C2 DE 19762639118 DE19762639118 DE 19762639118 DE 2639118 A DE2639118 A DE 2639118A DE 2639118 C2 DE2639118 C2 DE 2639118C2
Authority
DE
Germany
Prior art keywords
die
area
production
information carriers
roughened
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.)
Expired
Application number
DE19762639118
Other languages
German (de)
Other versions
DE2639118B1 (en
Inventor
Hermann Dipl.-Chem. Dr.Rer.Nat. 3007 Gehrden Koop
Ehrhard Ing.(Grad.) 3160 Lehrte Schrode
Horst Dipl.-Phys. Soeding
Adelbert Dipl.-Phys. Dr.Rer.Nat. Zielasek
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.)
Polygram 2000 Hamburg GmbH
Original Assignee
Polygram 2000 Hamburg 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 Polygram 2000 Hamburg GmbH filed Critical Polygram 2000 Hamburg GmbH
Priority to DE19762639118 priority Critical patent/DE2639118C2/en
Publication of DE2639118B1 publication Critical patent/DE2639118B1/en
Application granted granted Critical
Publication of DE2639118C2 publication Critical patent/DE2639118C2/en
Expired legal-status Critical Current

Links

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
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/42Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
    • B29C33/424Moulding surfaces provided with means for marking or patterning
    • 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
    • B29C43/00Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • 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
    • B29C43/00Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • B29C2043/023Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface having a plurality of grooves
    • B29C2043/025Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface having a plurality of grooves forming a microstructure, i.e. fine patterning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00Carriers for sound or information
    • B29L2017/001Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003Records or discs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Description

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (1)

Patentanspruch:Claim: PreQmatrize zur Herstellung von folien- oder plattenförmigen Informationsträgern, insbesondere für in Form von Oberflächenstrukturen eingespeicherte Video- und/oder Audiosignale, aus einem zwischen heiz- und kühlbaren Formhälften unter Einwirkung von Druck und Wärme verformbaren Massekloß aus wärmehärtbarem Material, d a durch gekennzeichnet, daß der zentrale informationsstrukturfreie Bereich (2) der Matrize (1) eine aufgerauhte Oberfläche aufweistPreQmatrize for the production of foil or Disc-shaped information carriers, in particular for those stored in the form of surface structures Video and / or audio signals from a mold halves that can be heated and cooled Action of pressure and heat deformable mass ball made of thermosetting material, d a through characterized in that the central information structure-free area (2) of the die (1) has a roughened surface Die Erfindung bezieht sich auf eine Preßmatrize zur Herstellung von folien- oder plattenförmigen Informationsträgern, insbesondere für in Form von Oberflächenstrukturen eingespeicherte Video- und/oder Audiosignaie, aus einem zwischen heiz- und kühlbaren Formhälften unter Einwirkung von Druck und Wärme verformbaren Massekloß aus wärmehärtbarem Material. The invention relates to a press die for the production of film or plate-shaped information carriers, in particular for video and / or audio signals stored in the form of surface structures, from a mold halves that can be heated and cooled under the action of pressure and heat deformable mass ball made of thermosetting material. Bei der Herstellung von Informationsträgern hoher Speicherdichte besteht das Problem, daß-bereits kleinste Matrizenverunreinigungen zu erheblichen Störungen bei der Abtastung derart vervielfältigter Informationsträger führen. Es hat sich nun gezeigt, daß der in die Presse eingelegte vorbereitete Massekloß sich an seiner Oberfläche etwas schneller abkühlt als im Innern, so daß sich eine Art Haut bildet Beim Ve-pressen dieses zwischenzeitlich etwas abgekühlten Massekloßes kann es nun passieren, daß kleinste Partikel dieser Kloßhaut bis in den die Signalstruktur beinhaltenden Matrizenbereich gelangen, wo sie nach dem Entformen zum Teil oder gänzlich hängen bleiben. Derartige Mikrostörungen auf der Matrize haben dann meist zur Folge, daß bei den folgenden Preßvorgängen weitere Materialpartikel anhaften.In the production of information carriers of high storage density, there is the problem that even the smallest Matrix contamination leads to considerable interference when scanning information carriers that have been copied in this way to lead. It has now been shown that the prepared mass that has been placed in the press adheres to his Surface cools a little faster than inside, so that a kind of skin forms it now happen that the smallest particles of this lump skin as far as the matrix area containing the signal structure, where they are partly after demolding or get stuck entirely. Such micro-disturbances on the die usually have the consequence that at further material particles adhere to the following pressing processes. Der vorliegenden Erfindung liegt nun die Aufgabe zugrunde, einen Weg aufzuzeigen, wie derartige Matrizenverunreinigungen in einfacher Weise vermieden werden können. Ausgehend von einer Preßmatrize der eingangs genannten Art wird diese AufgabeThe present invention is now based on the object of showing a way of how such Matrix contamination can be avoided in a simple manner. Starting from a press die This task is of the type mentioned at the beginning ίο erfindungsgemäß in der Weise gelöst, daß der zentrale informationsstrukturfreie Bereich der Matrize eine aufgerauhte Oberfläche aufweist Dieser aufgerauhte Oberflächenbereich bildet nämlich für den Massekloß einen derart großen Reibwiderstand, daß ein Abgleiten der Kloßhaut in den Informationsbereich der Matrize verhindert wird.ίο solved according to the invention in such a way that the central Information structure-free area of the die has a roughened surface The surface area forms such a large frictional resistance for the mass of the ball that it slips off the lump skin is prevented from entering the information area of the matrix. Im folgenden wird die Erfindung anhand der Zeichnung näher erläutert.The invention is explained in more detail below with reference to the drawing. Die Figur zeigt in schematischer Schnittdarstellung eine Matrize 1, deren äußerer Ringbereich eine den aufgezeichneten Signalen entsprechende Oberflächenstruktur in Form reliefartiger Erhöhungen und Vertiefungen enthält Der zentrale informationsstrukturfreie Bereich 2 der Matrize weist eine aufgerauhte Oberfläehe auf, wobei der Durchmesser dieser aufgerauhten Zone zweckmäßig so groß gewählt ist, daß er bis an den Informationsstrukturbereich heranreicht Der bei geöffneter Presse in das Zemrum der Matrize eingelegte Massekloß 3 wird nun beim Verpressen an den mit den Matrizen in Berührung kommenden und durch zwischenzeitliche Abkühlung durch Hautbildung etwas erhärteten Oberflächenbereiche in der aufgerauhten Mittelzone festgehalten, während gleichzeitig im Bereich der Kloßumfangsfläche 4 ein Aufplatzen des Kloßes passiert, so daß die im Kloßinnern noch homogene Masse in den Informationsstrukturbereich der Matrize 1 aussirömen kann.The figure shows a schematic sectional view of a die 1, the outer ring area of which is the surface structure corresponding to the recorded signals in the form of relief-like elevations and depressions The central information structure-free area 2 of the die has a roughened surface on, the diameter of this roughened zone is expediently chosen so large that it is up to the Information structure area that is inserted into the center of the die when the press is open Mud ball 3 is now being pressed against the ones that come into contact with the matrices and through intermittent ones Cooling due to skin formation, somewhat hardened surface areas in the roughened Central zone held while at the same time in the area of the circumferential surface of the lump 4 a bursting of the Dumpling happens, so that the still homogeneous mass in the inside of the dumpling enters the information structure area the die 1 can flow out.
DE19762639118 1976-08-31 1976-08-31 Press die for the production of film or plate-shaped information carriers Expired DE2639118C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762639118 DE2639118C2 (en) 1976-08-31 1976-08-31 Press die for the production of film or plate-shaped information carriers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762639118 DE2639118C2 (en) 1976-08-31 1976-08-31 Press die for the production of film or plate-shaped information carriers

Publications (2)

Publication Number Publication Date
DE2639118B1 DE2639118B1 (en) 1977-12-01
DE2639118C2 true DE2639118C2 (en) 1978-07-27

Family

ID=5986764

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19762639118 Expired DE2639118C2 (en) 1976-08-31 1976-08-31 Press die for the production of film or plate-shaped information carriers

Country Status (1)

Country Link
DE (1) DE2639118C2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4460656A (en) * 1979-04-30 1984-07-17 Rca Corporation Video disc preform and method of making a disc therefrom
DE3511712C2 (en) * 1985-03-29 1995-09-07 Polygram Gmbh Plate-shaped information carrier and method for its production

Also Published As

Publication number Publication date
DE2639118B1 (en) 1977-12-01

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Legal Events

Date Code Title Description
8381 Inventor (new situation)

Free format text: KOOB, HERMANN DIPL.-CHEM. DR.RER.NAT., 3007 GEHRDEN, DE SCHRODE, EHRHARD ING.(GRAD.), 3160 LEHRTE, DE SOEDING, HORST DIPL.-PHYS ZIELASEK, ADELBERD DIPL.-PHYS. DR.RER.NAT., 3000 HANNOVER, DE

8339 Ceased/non-payment of the annual fee