EP0713444A1 - Dispositif de fabrication de corps moules et procede de fabrication de ce dispositif - Google Patents

Dispositif de fabrication de corps moules et procede de fabrication de ce dispositif

Info

Publication number
EP0713444A1
EP0713444A1 EP94924283A EP94924283A EP0713444A1 EP 0713444 A1 EP0713444 A1 EP 0713444A1 EP 94924283 A EP94924283 A EP 94924283A EP 94924283 A EP94924283 A EP 94924283A EP 0713444 A1 EP0713444 A1 EP 0713444A1
Authority
EP
European Patent Office
Prior art keywords
heat compensation
producing
mold insert
compensation element
cavity
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Withdrawn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
EP94924283A
Other languages
German (de)
English (en)
Inventor
Klaus Schmetz
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.)
Innova Zug AG
Original Assignee
Innova Zug 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 Innova Zug AG filed Critical Innova Zug AG
Publication of EP0713444A1 publication Critical patent/EP0713444A1/fr
Withdrawn legal-status Critical Current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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • 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
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/76—Cores
    • 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

Definitions

  • the invention relates to a device for producing moldings, in particular plastic moldings, with a tool body having at least two mold insert elements and temperature control medium spaces, the mold insert elements enclosing the mold cavity, and a method for producing such a device.
  • multi-part, usually two-part molds are used in the production of moldings, in particular plastic moldings, which on the one hand enclose the mold cavity and on the other hand have to be separated from one another in order to remove the cured molded body.
  • plastic moldings which on the one hand enclose the mold cavity and on the other hand have to be separated from one another in order to remove the cured molded body.
  • these must meet certain conditions with regard to their surface properties. This applies in particular to moldings which later serve as data carriers, such as CDs.
  • the invention is therefore based on the object of providing a device for producing shaped articles and a method for producing such shaped articles, the productivity of the device or the corresponding production process being able to be increased by shorter cycle times.
  • the invention therefore relates to a method of compensating for temperature errors which would occur if the temperature was set very close to the wall of the molded body cavity.
  • This compensation of the tempering error takes place via a heat compensation layer, the thermal conductivity of which is considerably higher than that of the mold steel. Due to the high thermal conductivity, the isotherms, which are usually arranged concentrically around a temperature control room, are "blurred". Initial tests have shown that the heat in the heat-emitting layer is dissipated at about seven times the speed. This ensures a homogeneous temperature on the mold cavity wall and ultimately leads to a reduction in cycle times due to the significantly better cooling effect.
  • the heat compensation layer consists of copper or copper alloys and power transmission elements.
  • the power transmission elements are therefore necessary so that the pressure occurring during the pressing process, which is normally absorbed by the mold steel, can also be absorbed by the "softer" heat compensation layer or passed on to the other side of the heat compensation layer.
  • Steel balls can serve as power transmission elements.
  • Another teaching of the invention provides that a prefabricated as a heat compensation layer
  • Heat compensation element of high thermal conductivity is used.
  • the production of a prefabricated heat compensation element is expedient because the direct pouring of liquid copper or a liquid copper alloy into the mold insert element can lead to stresses and defects in the mold insert elements.
  • a cavity is thus first created in the mold insert elements, which accommodates the heat compensation element on the one hand and the temperature control medium system on the other hand.
  • the heat compensation element and also the element having the temperature control medium spaces are expediently connected to the mold insert element by high-temperature brazing.
  • the mold insert element 1 has tempering agent spaces 2 and a wall 3 for delimiting the mold cavity, not shown.
  • the wall 3 of the mold insert element 1 is designed as a flat surface. So that the temperature control agent rooms 2 are now relatively close to the wall 3 can be brought up, a heat compensation layer 4 is provided according to the invention between tempering agent rooms 2 and wall 3.
  • the heat compensation layer 4 is designed as a prefabricated heat compensation element, which is inserted into a cavity 5 produced in the mold insert element 1 and then connected to the mold insert element 1, preferably by high-temperature hard soldering.
  • the heat compensation element is reinforced by incorporated, not shown, power transmission elements.
  • both the heat compensation element 4 and the temperature control element 6 are designed as hollow cylindrical disks.
  • the invention can also be implemented in devices for producing non-symmetrical moldings.

Landscapes

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

Abstract

Un dispositif de fabrication de corps moulés, notamment de corps moulés en matières plastiques, comprend un cadre de moule ayant au moins deux empreintes rapportées (1) et des cavités (2) contenant l'agent réfrigérant. Les empreintes rapportées (1) renferment la cavité de moulage du corps moulé. Un procédé de fabrication d'un tel dispositif permet d'accroître la productivité par des cycles de fabrication plus courts. A cet effet, une couche de compensation thermique (4) à haute conductibilité thermique est située entre les cavités (2) qui contiennent l'agent réfrigérant et la cavité de moulage du corps moulé. Le dispositif est produit par les étapes suivantes: une cavité est ménagée dans les empreintes rapportées (1) dans la zone des cavités (2) devant contenir l'agent réfrigérant; un élément de compensation thermique est fabriqué; l'élément de compensation thermique est posé et les cavités (2) devant contenir l'agent réfrigérant sont ménagées; et l'empreinte rapportée (1) et l'élément de compensation thermique sont assemblés.
EP94924283A 1993-07-29 1994-07-23 Dispositif de fabrication de corps moules et procede de fabrication de ce dispositif Withdrawn EP0713444A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4325481A DE4325481C2 (de) 1993-07-29 1993-07-29 Vorrichtung zur Herstellung von Formkörpern und Verfahren zur Herstellung einer solchen Vorrichtung
DE4325481 1993-07-29
PCT/EP1994/002441 WO1995003928A1 (fr) 1993-07-29 1994-07-23 Dispositif de fabrication de corps moules et procede de fabrication de ce dispositif

Publications (1)

Publication Number Publication Date
EP0713444A1 true EP0713444A1 (fr) 1996-05-29

Family

ID=6494005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94924283A Withdrawn EP0713444A1 (fr) 1993-07-29 1994-07-23 Dispositif de fabrication de corps moules et procede de fabrication de ce dispositif

Country Status (7)

Country Link
EP (1) EP0713444A1 (fr)
JP (1) JPH09500838A (fr)
KR (1) KR960703716A (fr)
CA (1) CA2168267A1 (fr)
DE (1) DE4325481C2 (fr)
SK (1) SK12996A3 (fr)
WO (1) WO1995003928A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10151078B4 (de) * 2000-10-11 2004-09-09 Fachhochschule Jena Spritzgiesswerkzeug
DE102006008359B4 (de) * 2006-02-21 2008-06-05 Direkt Form Gmbh Temperierbares Werkzeug aus einem gegossenen metallischen Werkstoff zur Formgebung von Werkstücken
DE102007054723B4 (de) * 2007-11-14 2015-05-28 Cl Schutzrechtsverwaltungs Gmbh Formteil
DE102020118192A1 (de) * 2020-07-09 2022-01-13 Fox Velution Gmbh Formwerkzeug zur Herstellung eines Partikelschaumformteils

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB815388A (en) * 1956-08-01 1959-06-24 Transcription Mfg And Recordin Improvements in or relating to apparatus for moulding gramophone disc records
GB149502A (en) * 1919-07-07 1920-08-19 John Voorhees Errickson Improvements in and relating to a method and apparatus for moulding phonograph records and like articles
CH507802A (de) * 1970-02-25 1971-05-31 Synthexa Establishment Verfahren und Spritzwerkzeug zur Herstellung von Hohlkörpern aus thermoplastischen Kunststoffen
GB1509362A (en) * 1977-01-17 1978-05-04 Emi Electrola Gmbh Disc record press
NL8304399A (nl) * 1983-12-22 1985-07-16 Philips Nv Afwisselend verwarmbaar en koelbaar persblok.
US4757972A (en) * 1986-08-29 1988-07-19 Acushnet Company Fast thermal response mold
DE3632640A1 (de) * 1986-09-25 1988-06-01 Agfa Gevaert Ag Verfahren zur herstellung eines spritzgiesswerkzeugs
DE3808363A1 (de) * 1988-03-12 1989-09-21 Wolff Hans Martin Kern fuer spritzgiesswerkzeug und verfahren zu seiner herstellung
DE9201642U1 (de) * 1992-02-11 1992-06-04 Gebr. Krallmann GmbH, 4901 Hiddenhausen Spritzgießwerkzeug
DE4234961C2 (de) * 1992-10-16 1996-07-25 Innova Zug Ag Verfahren zur Herstellung eines Formwerkzeuges für die Herstellung von Kunststofformteilen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9503928A1 *

Also Published As

Publication number Publication date
KR960703716A (ko) 1996-08-31
DE4325481C2 (de) 1996-07-11
DE4325481A1 (de) 1995-02-02
CA2168267A1 (fr) 1995-02-09
SK12996A3 (en) 1996-11-06
JPH09500838A (ja) 1997-01-28
WO1995003928A1 (fr) 1995-02-09

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