WO1988007924A1 - Garniture de moulage a surface polie resistante a l'abrasion utile dans la production de pieces en plastique - Google Patents

Garniture de moulage a surface polie resistante a l'abrasion utile dans la production de pieces en plastique Download PDF

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Publication number
WO1988007924A1
WO1988007924A1 PCT/EP1988/000302 EP8800302W WO8807924A1 WO 1988007924 A1 WO1988007924 A1 WO 1988007924A1 EP 8800302 W EP8800302 W EP 8800302W WO 8807924 A1 WO8807924 A1 WO 8807924A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
scratch
inserts
insert according
casting
Prior art date
Application number
PCT/EP1988/000302
Other languages
German (de)
English (en)
Inventor
Helmut Piringer
Original Assignee
Opt Engineering 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 Opt Engineering Ag filed Critical Opt Engineering Ag
Publication of WO1988007924A1 publication Critical patent/WO1988007924A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/0048—Moulds for lenses
    • B29D11/00528—Consisting of two mould halves joined by an annular gasket
    • 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
    • B29C33/08—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means for dielectric heating
    • 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
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • 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
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • B29C37/0032—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied upon the mould surface before introducing the moulding compound, e.g. applying a gelcoat
    • 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
    • B29C45/14778—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 the article consisting of a material with particular properties, e.g. porous, brittle
    • 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
    • B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
    • 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
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00413—Production of simple or compound lenses made by moulding between two mould parts which are not in direct contact with one another, e.g. comprising a seal between or on the edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D17/00—Producing carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records; Producing record discs from master stencils
    • B29D17/005—Producing optically read record carriers, e.g. optical discs
    • 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
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • B29C2037/0035—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied as liquid, gel, paste or the like
    • 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
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • B29C2037/0039—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied in powder or particle form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2909/00—Use of inorganic materials not provided for in groups B29K2803/00 - B29K2807/00, as mould material
    • B29K2909/02—Ceramics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2909/00—Use of inorganic materials not provided for in groups B29K2803/00 - B29K2807/00, as mould material
    • B29K2909/02—Ceramics
    • B29K2909/04—Carbides; Nitrides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0087—Wear resistance
    • 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
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses
    • 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
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0058—Mirrors

Definitions

  • the invention relates to new mold inserts, in particular those with a polished and scratch-resistant surface, especially for casting and injection molding tools, and their use for the production of plastic ropes, in particular those with an optical surface quality, especially lenses, mirrors, Compact ] _ Q Discs and other shaped bodies for the see-through, reflection, laser and transmission optics.
  • plastic parts in particular those with optical surface quality, especially lenses, mirrors, ⁇ 5 Compact DisCs and other moldings for the see-through, reflection, laser and transmission optics, they emerge from - preferably transparent - thermoplastic or thermosetting plastics various problems, both in terms of the quality of the plastics obtained thereby 'nd area, 0 and in terms of the economic friendliness of their production, related to the fact that the ver ⁇ for their preparation used mold inserts in molding and injection molding hin ⁇ clearly their shape surface quality and their other physical properties have defects that the Her ⁇
  • the service life of the mold inserts is relatively short owing to the mold surface hardness being too low, so that the mold inserts often have to be replaced by new mold inserts both in the casting process and in the injection molding process.
  • thermoplastic plastics A special problem that arises during the injection molding of thermoplastic plastics consists in the fact that the plastic, which must be injected into the injection mold in molten form, partially decomposes at the melting temperature with the formation of gas, which has the effect that Already at the start of the injection molding process, the mold surfaces of the mold inserts receive an undesirable coating by depositing the plastic decomposition gases on the cool surface, which adversely affects the surface quality of the injection molded plastic part.
  • This coating must therefore be removed frequently during the injection molding process, which in turn has the consequence that the surface of the mold inserts is inevitably mechanically damaged due to their inadequate surface hardness during cleaning, which leads to a further loss in quality of the molded parts produced therewith and to Reworking or replacement of the damaged mold insert is becoming increasingly necessary.
  • thermoplastics more particularly sondere polycarbonates particularly advantageous because of their good warp ⁇ bility and fracture resistance Ma ⁇ terialien for the production of plastic parts with optical surface quality constitute, after the current state of the art can not be processed in a satisfactory manner.
  • Plastic parts with optical surface quality such as lenses, mirrors, compact discs and other parts for the see-through, reflection, laser and transmission optics, are therefore still largely made of duroplastic plastics, in particular diallyl diglycol carbonate, using the Die casting process manufactured, which delivers stress-free plastic parts, but due to their tendency to splinter and cracking no longer meet today's increased safety requirements. This process is also technically complicated and uneconomical, not least because of the " short service life of the mold inserts previously used for this.
  • the object of the invention was therefore to find mold inserts, in particular those for casting and injection molding tools, which meet today's higher requirements with regard to their surface quality and other physical properties.
  • the mold inserts in particular those for casting and injection molding tools, are made from technical ceramics based on oxide, nitride, carbide or cermet or mixtures thereof become.
  • the invention relates to a mold insert which is particularly suitable for casting and injection molding tools, which is characterized in that it consists of technical ceramics based on oxide, nitride, carbide or cermet or mixtures thereof and preferably has an optically polish surface. It can be made both from electrically non-conductive technical ceramics based on oxide and / or nitride for use in casting tools and from electrically conductive, preferably semiconducting, technical ceramics based on carbide and / or cermet for use in Injection molds exist.
  • the new material used according to the invention is distinguished by the fact that it has particularly good heat transfer values and that its surface can be polished relatively easily mechanically to an optical surface which has an exceptionally high scratch resistance, as is the case with the previously known ones Materials could not be achieved. Its surface scratch hardness is> 9 and thus comes very close to the surface scratch hardness of diamond (10).
  • the mold insert according to the invention can have any cross section, preferably it has a rectangular, square, semicircular or circular segment cross section.
  • plastic parts produced by the casting process can be obtained with a significantly higher quality, which is due to the fact that, due to the higher heat transfer values of the molding insert according to the invention, the internal stresses which occur during molding as a result of the initiation of the curing reaction of externally supplied heat and the resulting heat of reaction in the plastic molding occur due to the improved heat transfer dissolve quickly without additional tempering, which in combination with the shorter polarization time not only leads to a more economical design of the casting process, but also also leads to a significant improvement in the quality, in particular strength, of the cast molded body.
  • the mold inserts used according to the invention can be polished easily, preferably mechanically, to give optical mold surfaces which have excellent scratch resistance, which cannot be achieved with the materials hitherto available on the market. This leads to a significantly longer service life of the mold inserts, even if they are subjected to multiple surface treatments during their use in injection molding tools.
  • the mold inserts according to the invention can be heated and cooled much better than the known mold inserts.
  • the electrically conductive, preferably semiconductive, embodiments of the mold inserts according to the invention have the advantage that they can be connected to a surface by means of electrodes which can be connected to a suitable voltage source, preferably a direct voltage or alternating voltage source that its surface can be heated directly to any desired temperature within a few seconds, as a result of which the undesirable formation of deposits on the mold inserts when the injection molding process is started can be reliably avoided.
  • the rapid heatability of these embodiments of the mold inserts according to the invention means that internal stresses which occur during injection molding and can be attributed to an undesirable alignment of the molecules, which lead to undesired birefringence and thus to optical errors, can be solved in a technically simple and reliable manner, the mold inserts according to the invention in this special embodiment can be set to any desired temperature within a few seconds on account of their integrated resistance heating. Because of the high natural hardness of the materials used according to the invention, it is no longer necessary to carry out a special surface treatment. Annealing to dissolve unwanted internal tensions can be omitted.
  • the mold inserts according to the invention are excellent materials for injection molding tools in which thermoplastic plastics can be processed into optically perfect moldings of any shape in a technically simple and economical manner without the upper parts surfaces of the mold inserts have to be reworked or the mold inserts themselves have to be replaced by new ones at more or less frequent intervals.
  • the invention furthermore relates to processes for the production of plastic parts, in particular those with an optical surface quality, in particular lenses, mirrors, compact discs and other shaped articles for the see-through, reflection, laser and transmission optics, from - preferably transparent - plastics, in particular thermosetting or thermoplastic plastics, which are characterized in that the plastics to be processed in each case in the form of the starting monomers, if appropriate in a mixture with a catalyst (when processing thermosetting or catalytically curable thermosetting plastics in casting tools), or in the molten state (when processing thermoplastic materials in injection molding tools) in a manner known per se into a mold or injection mold, in which mold inserts of the type described above are used, introduced and demolded after curing to give the desired moldingsbecome.
  • thermosetting or thermoplastic plastics which are characterized in that the plastics to be processed in each case in the form of the starting monomers, if appropriate in a mixture with a catalyst (when processing thermosetting or catalytically curable thermosetting plastics in casting
  • these processes are preferably used Molded inserts made of an electrically conductive, in particular semiconducting, technical ceramic based on carbide and / or cermet are used, the surfaces of which have electrodes for the connection of a direct voltage or alternating voltage source for direct heating of the molded inserts.
  • the method according to the invention can be carried out in such a way that a liquid, pasty or powdery material is applied to the surface of the mold inserts before the plastic to be processed is introduced into the casting or injection mold in order to achieve a melted, scratch-resistant surface coating and if necessary curing with heating, so that after removal from the mold a plastic molded body with a scratch-resistant surface coating, which can be subjected to any modifications, for example coloring, is obtained (so-called inmold process).
  • FIG. 1 shows an embodiment of the mold insert according to the invention made of an electrically conductive or semiconductive technical ceramic in plan view
  • Figure 2 shows the same embodiment of the mold insert according to the invention in cross section.
  • FIG. 3 shows a schematic illustration of an injection molding tool
  • Fig. 4 is a schematic representation of a casting tool.
  • the mold inserts according to the invention consist of technical ceramics on oxide, nitride and / or Carbide-based or from cer ets or mixtures thereof. They are brought into the desired shape by pressing under high pressure and then subjected to a so-called reaction sintering, resulting in porous mold insert blanks which are then subjected to a customary post-treatment, in particular a chemical or mechanical, preferably mechanical, surface treatment.
  • Preferred ceramic materials are the carbides, nitrides and oxides of metals, such as Al, Cr, Mg, Si, Ti, Cr, Mo, in particular metals of Group IV of the Periodic Table of the Elements.
  • the cermets used according to the invention are known materials from two separate phases, namely a metallic and a ceramic component, which differ from one another in terms of hardness and melting point.
  • the ceramic portion preferably carbides, nitrides, silicides, borides and oxides of Al, Cr, Mg, Si, Ti, Cr, Mo and the like
  • the metallic Proportion for example Cr, Co, Ni, Fe, Mo, W and the like
  • Such materials are known per se and are described, for example, in Römpp, Chemielexikon, 6th edition, page 990. They are produced by mixing the ceramic portion (powder) with the metal portion (powder), pressing the mixture under high pressure to the desired form, sintering in a neutral or weakly acidic, reducing atmosphere, which is then followed by a surface treatment .
  • any moldings in particular by the casting resin process (monomer casting process) and injection molding process, can be produced, namely both non-optical moldings of any size and shape and optical moldings of any size and shape. Due to the shape used according to the invention The moldings produced have inserts significantly less internal stresses than the moldings produced using the tools customary hitherto. They have a higher strength and thus a higher utility value.
  • the mold inserts according to the invention are particularly advantageous for the production of optical injection molded parts, in particular lenses, mirrors, compact discs and other moldings for the see-through, reflection, laser and
  • Transmission optics made of plastics, preferably transparent plastics, in particular thermoplastic plastics.
  • plastics preferably transparent plastics, in particular thermoplastic plastics.
  • mirrors and rear-view mirrors, sunglasses lenses, correction glasses lenses, contact lenses and implant lenses (as a replacement for the natural iris) can be used not only in a technically simple and economical manner excellent quality both in the form of so-called blanks, ie Manufacture blanks with surfaces that are flat on both sides and in the form of blanks with surfaces that are preformed on one side or concave and / or convex on both sides. They are also suitable for the production of lenses for the transmission optics, of lenses for the optical waveguide optics, of lenses for the laser optics and of camera lenses.
  • thermoplastic and thermosetting plastics can be processed, including those that have not been able to be used according to the prior art, such as polycarbonates.
  • tech ⁇ nically very important thermoset CR 39 (a casting resin on diethylene glycol bisallylcarbonate-based ') can be processed according to Erfin dung excellent. This also applies to the 1 Processing of the monomers specified below using the cast resin process:
  • Methyl methacrylate diethylene glycol bisallyl carbonate, ethoxymethyl methacrylate, ethylene glycol dimethacrylate, ethylene glycol diacrylate, polyethylene glycol dimethacrylate.
  • FIG. T of the accompanying drawings shows a schematic representation of a top view of an embodiment of the mold insert 1 according to the invention, which is applied to a carrier plate 3 with an integrated cooling unit.
  • Two electrical contacts 2 _5 are attached to the mold surface of the mold insert 1 and are connected to a voltage source.
  • the surface of the mold insert 1 according to the invention can thus be heated to any desired temperature within a few seconds.
  • FIG. 2 shows the same form of insert 1 in section, from the direct attachment of the electrical contacts 2 of the form-tray 1 is seen which is inserted in a support plate 3 with integrated cooling unit.
  • FIG. 3 shows a complete injection mold, as is usually used for the production of injection moldings.
  • Such an injection mold is mounted on an injection molding machine and during the injection of molten plastic, the Spritzg screenmaschi- Q ne is kept closed. After cooling, the molded body is removed from the injection molding machine.
  • the injection mold as can be seen in schematic representation in Fig. 3, consists of a two-part mold 35 carrier 3 at the dividing plane 3a in an upper and lower half can be opened to remove the finished injection molding.
  • the mold carrier 3 which is preferably made of steel, in particular Invar steel, has an integrated cooling unit (not shown) which preferably consists of bores, ribs, channels and the like for the introduction of a cooling medium which is linear in the longitudinal direction or Can be transverse or concentric.
  • Inside the two-part mold carrier 3 is the two-part cavity or mold (shaping part) in the illustrated embodiment, consisting of the two mold inserts 1, the inner surfaces of which form a distance parallel to one another, the distance between the two mold surfaces being the thickness of the finished injection molded part.
  • the liquid plastic is injected into the space between the two mold inserts 1 through the sprue 4 with the feed channel 4a adjoining it, with the injection mold closed.
  • the two mold inserts are simultaneously heated to the desired temperature by means of the electrical contacts 2 which are attached directly to the mold inserts 1 and are connected to a voltage source (not shown).
  • the electrical contacts are preferably made of copper, silver-plated copper or aluminum and directly to the mold inserts -1. soldered on.
  • Both gases and. Can be used as the cooling medium which flows through the ribs or channels in the two-part mold carrier 3
  • Liquids are used, preferably air, liquid nitrogen, freon or another fluorocarbon, water or oil is used.
  • Fig. 4 shows in the form of a schematic representation 1 mold, as used in the so-called casting resin process (monomer casting process).
  • the mold consists of the two mold inserts 1, the mold surfaces of which run parallel to one another 5 at a defined distance from one another.
  • a sealing ring 5 made of an elastic material, preferably rubber or another elastomer, serves as a spacer and closes the cavity between the two mold inserts 1. The whole arrangement is eg from
  • an elastic wire clamp 6 which can be pulled off to open the casting tool and demould the casting. To close the casting tool, it is pushed onto the arrangement of the two mold inserts 1 and the sealing ring 5 under tension, so that
  • the liquid plastic is introduced e.g. by means of an injection needle through the sealing ring 5, which preferably consists of polyvinyl chloride plasticized with dioctyl phthalate.
  • the casting tool is in an external medium, with the help of which it can be heated or cooled.
  • eyeglass lenses can be produced as blanks which, if

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Des garnitures de moulage pour outils de moulage et de moulage par injection sont composées de céramiques techniques à base d'oxydes, de nitrures, de carbures ou de cermets ou de leurs mélanges, ont une surface polie de moulage résistante aux abrasions et sont utiles dans des procédés de fabrication de pièces en plastique, en particulier celles ayant une surface de qualité optique, notamment lentilles, miroirs, disques compacts et d'autres corps moulés utilisés en optique par transparence, par réflexion, à laser et de transmission en matières plastiques de préférence transparentes, notamment des matières plastiques duroplastiques ou thermoplastiques.
PCT/EP1988/000302 1987-04-10 1988-04-11 Garniture de moulage a surface polie resistante a l'abrasion utile dans la production de pieces en plastique WO1988007924A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3712128.6 1987-04-10
DE19873712128 DE3712128A1 (de) 1987-04-10 1987-04-10 Formeinsatz mit kratzfester polierter formoberflaeche, insbesondere fuer giess- und spritzgiesswerkzeuge, und dessen verwendung bei der herstellung von kunststoffteilen, insbesondere solchen mit optischer oberflaechenqualitaet

Publications (1)

Publication Number Publication Date
WO1988007924A1 true WO1988007924A1 (fr) 1988-10-20

Family

ID=6325300

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1988/000302 WO1988007924A1 (fr) 1987-04-10 1988-04-11 Garniture de moulage a surface polie resistante a l'abrasion utile dans la production de pieces en plastique

Country Status (3)

Country Link
EP (1) EP0309529A1 (fr)
DE (1) DE3712128A1 (fr)
WO (1) WO1988007924A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3838546A1 (fr) * 2019-12-17 2021-06-23 Essilor International Bande porte-tranche pour processus de moulage par injection

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3902936A1 (de) * 1989-02-01 1990-08-02 Hoechst Ceram Tec Ag Keramische tauchformen und verfahren zu ihrer herstellung
DE3903544A1 (de) * 1989-02-07 1990-08-09 Repenning Detlev Werkzeug fuer die elastomerverarbeitung
DE4012933A1 (de) * 1990-04-24 1991-10-31 Bosch Gmbh Robert Maschinen- und werkzeugteile fuer spritzgiessen, extrudieren, strangpressen und druckguss
DE4013471A1 (de) * 1990-04-27 1991-10-31 Fischer Ag Georg Einrichtung zum stirnseitigen verschweissen von kunststoffteilen
US5241157A (en) * 1990-04-27 1993-08-31 Georg Fischer Ag Arrangement for butt-welding plastic material components
WO1994020288A1 (fr) * 1993-03-05 1994-09-15 Ict Axxicon B.V. Moule de fabrication de supports d'information discoides
DE19633121C1 (de) * 1996-08-16 1997-05-15 Ymos Ag Ind Produkte Verfahren zum Erwärmen eines Formwerkzeuges
DE19653078A1 (de) * 1996-12-19 1998-06-25 Trace Optical Leitstrukturen in optischen Speichermedien
DE10337685B4 (de) * 2003-08-16 2008-02-28 Kraussmaffei Technologies Gmbh Heizbares Werkzeug
DE102005025163B4 (de) * 2005-06-01 2014-02-13 Webasto Ag Herstellungsverfahren für eine Verschlussanordnung für eine Fahrzeugöffnung
DE102007010099A1 (de) 2007-03-02 2008-09-04 Kraussmaffei Technologies Gmbh Beheizbares Werkzeug
DE102009027341A1 (de) * 2009-06-30 2011-01-05 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Formwerkzeug und Verfahren zu seiner Verwendung
WO2011073329A1 (fr) * 2009-12-17 2011-06-23 Novartis Ag Procédé de dosage de matériau de formation de lentille dans un moule
DE202010002328U1 (de) 2010-02-12 2010-10-14 Konstruktionsbüro Hein GmbH Formwerkzeug
US8702412B2 (en) 2011-01-12 2014-04-22 Us Synthetic Corporation Superhard components for injection molds
US8512023B2 (en) 2011-01-12 2013-08-20 Us Synthetic Corporation Injection mold assembly including an injection mold cavity at least partially defined by a polycrystalline diamond material
DE202013007509U1 (de) 2013-08-26 2014-11-28 FCT Hartbearbeitungs GmbH Keramisches Heizelement und Umformwerkzeug
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DE102014113069A1 (de) 2014-09-10 2016-03-10 Airbus Operations Gmbh Anordnung und Verfahren zum Herstellen eines Faserverbundwerkstücks
DE102017220315B3 (de) 2017-11-15 2018-11-08 Bayerische Motoren Werke Aktiengesellschaft Druckgussmaschine mit einer Druckgussform zur Herstellung metallischer Druckgussteile
CN109757777B (zh) * 2018-11-06 2022-03-29 深圳麦克韦尔科技有限公司 雾化器及其外壳的成型模具

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979773A (en) * 1959-08-26 1961-04-18 Honeywell Regulator Co Molding apparatus
FR2170220A1 (en) * 1972-02-02 1973-09-14 Deutsche Spiegelglas Ag Injection mould - using glass ceramic liners to shape high polymers for optical lenses
US4205028A (en) * 1979-01-11 1980-05-27 Ferro Corporation Forming protective skin on intricately molded product
JPS59118419A (ja) * 1982-12-24 1984-07-09 Toshiba Corp 樹脂成形用金型
JPS59142113A (ja) * 1983-02-04 1984-08-15 Kanto Seiki Kk 樹脂成形品とその製造方法
JPS60165223A (ja) * 1984-02-07 1985-08-28 Asahi Optical Co Ltd レンズ矯正用型
JPS61100425A (ja) * 1984-10-23 1986-05-19 Sekisui Chem Co Ltd プラスチツク成形用金型
US4614630A (en) * 1984-04-02 1986-09-30 Minnesota Mining And Manufacturing Co. Mold having ceramic insert, method for injection molding using the same

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979773A (en) * 1959-08-26 1961-04-18 Honeywell Regulator Co Molding apparatus
FR2170220A1 (en) * 1972-02-02 1973-09-14 Deutsche Spiegelglas Ag Injection mould - using glass ceramic liners to shape high polymers for optical lenses
US4205028A (en) * 1979-01-11 1980-05-27 Ferro Corporation Forming protective skin on intricately molded product
US4205028B1 (fr) * 1979-01-11 1990-05-08 Ferro Corp
JPS59118419A (ja) * 1982-12-24 1984-07-09 Toshiba Corp 樹脂成形用金型
JPS59142113A (ja) * 1983-02-04 1984-08-15 Kanto Seiki Kk 樹脂成形品とその製造方法
JPS60165223A (ja) * 1984-02-07 1985-08-28 Asahi Optical Co Ltd レンズ矯正用型
US4614630A (en) * 1984-04-02 1986-09-30 Minnesota Mining And Manufacturing Co. Mold having ceramic insert, method for injection molding using the same
JPS61100425A (ja) * 1984-10-23 1986-05-19 Sekisui Chem Co Ltd プラスチツク成形用金型

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, Band 10, Nr. 281 (M-520)(2337), 25. September 1986; & JP-A-61100425 (SEKISUI CHEM CO LTD) 19. Mai 1986 *
Patent Abstracts of Japan, Band 6, Nr. 109 (M-137)(987), 19. Juni 1982; & JP-A-5739925 (HITACHI KASEI KOGYO K.K.) 5. Marz 1982 *
Patent Abstracts of Japan, Band 8, Nr. 100 (M-295)(1537), 11. Mai 1984; & JP-A-5912806 (SEIKOUSHIYA K.K) 23. January 1984 *
Patent Abstracts of Japan, Band 8, Nr. 238 (M-335)(1675), 31. Oktober 1984; & JP-A-59118419 (TOSHIBA K.K.) 9. Juli 1984 *
Patent Abstracts of Japan, Band 8, Nr. 270 (M-344)(1707), 11. Dezember 1984; & JP-A-59142113 (KANTOU SEIKI K.K) 15. August 1984 *
Patent Abstracts of Japan, Band 9, Nr. 333 (M-443)(2056), 27. Dezember 1985; & JP-A-60165223 (ASAHI KOUGAKU KOGYO K.K.) 28. August 1985 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3838546A1 (fr) * 2019-12-17 2021-06-23 Essilor International Bande porte-tranche pour processus de moulage par injection
US11878480B2 (en) 2019-12-17 2024-01-23 Essilor International Wafer holder band for mold injection process

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