US3761047A - Mold coating - Google Patents

Mold coating Download PDF

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Publication number
US3761047A
US3761047A US00170067A US3761047DA US3761047A US 3761047 A US3761047 A US 3761047A US 00170067 A US00170067 A US 00170067A US 3761047D A US3761047D A US 3761047DA US 3761047 A US3761047 A US 3761047A
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United States
Prior art keywords
heat
mold
coating
insulating particles
internal cavity
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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 - Lifetime
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US00170067A
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English (en)
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G Mao
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GNB Inc
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Gould Inc
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Publication date
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Publication of US3761047A publication Critical patent/US3761047A/en
Assigned to GNB BATTERIES INC. reassignment GNB BATTERIES INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: GOULD INC.,
Assigned to CITIBANK, N.A. reassignment CITIBANK, N.A. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GNB BATTERIES INC.
Assigned to GNB INCORPORATED reassignment GNB INCORPORATED RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CITIBANK, N.A.
Assigned to GNB INCORPORATED reassignment GNB INCORPORATED RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CITIBANK, N.A.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof

Definitions

  • This invention relates to forming objects and, more particularly, to a coating for molds such as are used in the forming of battery grids.
  • Battery grid casting is typically carried out on a semicontinuous basis; and, from an economic standpoint, it is desirable to employ a method of grid casting which allows formation of the grid with a minimum cycle time yet which controls the freezing or solidifying of the metal so that a complete grid is formed.
  • the cycle time may vary from perhaps one grid per minute for a large industrial battery grid to to grids per minute for automotive batteries. Another requirement in casting operations of this type is that the formed grid must be able to be readily released from the mold surface.
  • Cast iron is the typical material used for such molds but does not adequately satisfy the requirements identified herein; for this reason, it is conventional practice to coat battery grid molds with various types of coatings in an attempt to provide the necessary mold surface characteristics for the grid casting operation.
  • a widely used mold coating composition includes cork dust and clay suspended in water and sodium silicate. While such compositions function in an adequate manner, coatings of this type either disintegrate or are otherwise dislodged from the mold surface during continuous grid casting; and the coating has to be reapplied every 3 or 4 hours, which, of course, interrupts the grid casing operation and significantly reduces the production rate.
  • a related and more specific object lies in the .provision of a method of casting battery grids which enhances the production rate by minimizing the need for downtime.
  • Another object provides a coated mold with desirable flow properties across the mold surface for the fluid being employed and, also, which provides desirable release of the formed grid from the mold after the completion of the casting cycle.
  • Yet another object of the present invention is to provide a battery grid mold coating having heat-insulating properties optimally coordinating the freezing and s0- lidifying of the molten metal or alloy with the completeness of the grids formed so as to yield a minimum cycle time.
  • a still further object lies in the provision of a mold coating for battery grid casting which allows the displaced air to readily escape from the mold cavity during casting.
  • FIG. 1 is a plan view of one section of a battery grid mold of the top pour type having thereon the coating of the present invention and showing the gate area through which the casting metal or alloy flows and the grid cavity;
  • FIG. 2 is a cross-sectional view of the mold shown in FIG. 1 and schematically further showing the coating of the present invention, the size of the coating being exaggerated for illustrative purposes;
  • FIG. 3 is a photomicrograph of a portion of a mold surface coated in accordance with the present invention and illustrating the surface roughness which allows the air to escape during filling of a mold cavity.
  • the present invention provides a mold having an adherent continuous perfluorocarbon resin film, preferably of relative uniform thickness thereon with a specified portion of heat-insulating particles dispersed within the film.
  • the amount and size of the heatinsulating particles are controlled within specific limits to provide a mold surface having the desired heatinsulating properties as well as a surface with a controlled roughness, which allows the displaced air to escape and yet does not adversely affect beyond acceptable limits the surface of the cast grid.
  • the invention is particularly useful in relative low temperature range grid casting operations. While such operations are typically carried out in the range of from 700 to 900F.
  • perfluorocarbon resins such as polytetrafiuoroethylene may be employed to provide a long-lasting mold coating even though such resins are generally not recommended for usage at temperatures above about 500F. and are further considered as unstable at temperatures above about 600F.
  • the mold surface In applying the perfluorocarbon resin, heat-insulating particlecoating of the present invention to the mold, it is desirable to first clean the mold surface. While perhaps not essential, cleaning improves the adhesion of the coating to the mold surface, typically cast iron. The surface may thus be cleaned with suitable solvents and degreasers which are well known. However, it has been found to be advantageous to carry out the cleaning step by preheating the mold to a temperature sufficient so that the surface is free of oils, grease and other impurities. This may be accomplished by heating the mold surface to a temperature of about 725 to 800F. and holding for a period of about 5 minutes or perhaps even more.
  • another preparatory step that may be carried out to also improve adhesion of the coating to the surface involves roughening the surface by mechanical or chemical means.
  • Such techniques are well known and it has been found desirable to accomplish the surface roughening operation by sandblasting the mold surface to a smooth matte finish, e.g., by using 60 to grit size silica sand. After grit blasting, the grit should be blown off to insure that no particles stick to the surface of the mold, and the sandblasted surface may then be cleaned using a solvent such as trichloroethylene.
  • a perfluorocarbon resin as defined herein is combined with specified amounts of heat-insulating particles to provide a mixture which may be applied to the mold surface to form a coating with desirable properties for battery grid casting applications.
  • a polytetrafluoroethylene resin since such resins have particularly advantageous properties for this application.
  • perfluorocarbons include mixtures of polytetrafluoroethylene and polymonochlorotrifluoroethylene, polymonochlorotrifluoroethylene, copolymers of tetrafluoroethylene with hexafluoropropylene, mixtures of polytetrafluoroethylene and polytetrafluoropropylene and equivalents thereof.
  • the perfluorocarbon component must be sufficiently non-adherent so that the formed object, such as the grid, may be readily separated from the mold and must be inert with respect to the molten fluid. Further, it should have sufficient stability so as not to be significantly affected by the molding temperatures being used.
  • the particle component of the coating must be sized to provide a surface roughness which allows the air in the mold cavity to escape as the casting metal or alloy flows therein so that a substantially complete grid is formed yet not substantially impair the surface texture of the formed grid.
  • the material used for the particles must possess heat-insulating properties adequate to keep the fluid molten until the mold cavity is filled.
  • the particle material must be chemically inert with respect to the perfluorocarbon component and be capable of withstanding the cure temperatures required for such materials, as will be hereinafter described.
  • Talc hydrated magnesium silicate
  • cork dust are preferred due to their relatively superior heat-insulating properties and other desirable properties.
  • materials that may perhaps be used include silica, alumina and diatomaceous earth.
  • a particle size of about to 80 microns should be utilized to provide a uniform surface roughness essential to allowing the casting metal to fill the cavity while also imparting satisfactory characteristics as regards the application of the coating to the mold and the life of the coating.
  • the perfluorocarbon and the heat-insulating particle components should be combined in a manner that will achieve the shortest casting cycle time consistent with allowing the metal or alloy being cast a sufficient time to fill the cavity before freezing or solidifying. It is desirable to keep the thickness of the coating to a minimum, consistent with its functional requirements. Accordingly, to achieve such objectives, the thickness of the coating should be within the range of from about 1.5 to 3.5 mils and comprise, by volume, from about 10 to 40 percent of heat-insulating particles with the remainder being the perfluorocarbon component.
  • the amount of the heat-insulating particles used and, to some extent, the thickness of the film is dependent upon the thickness of the object being formed and its size (i.e., the distance the molten fluid has to travel). For example, formation of a conventionally sized industrial battery grid having a thickness of about 0.2 inch can employ about 10 percent, by volume, particles while an automotive battery grid of conventional size and with a thickness of about 0.06 inch may require about 40 percent of the heatinsulating particles.
  • the coating it is desirable to apply the coating to the mold surface by spraying.
  • Techniques for spraying perfluorocarbon resin slurries are well known and may be adopted to apply the coating of this invention.
  • the heat-insulating particles may be added to a perfluorocarbon solution; and the resulting solution mixed to provide uniform dispersion of the heat-insulating particles therein.
  • the mixture or solution can be then strained through a stainless steel screen of, for example, mesh to insure that no coagulated perfluorocarbon-heat-insulating particles are transferred to the spraying apparatus.
  • Conventional suction (airless) or pressure (compressed air) spraying equipment may be used, and such apparatus is commercially available.
  • FIGS. 1 and 2 show a typical grid casting mold having adhered thereto the coating of the present invention.
  • a stationary mold section 10 of the top pour, double-cavity type which comprises a gate 12 through which the molten metal or alloy being cast is passed.
  • the gate 12 feeds cavities 14, 14.
  • Two of such stationary mold sections are fitted together during casting to define the cavities therebetween and are then parted following solidification of the material being cast so that the formed grids from the cavities may be removed.
  • the coating indicated generally at 16, comprises a continuous film 18 of the perfluorocarbon component with heat-insulating particles 20 uniformly dispersed therein.
  • the perfluorocarbon, heat-insulating particle coating is applied only to the mold surface and the cavity areas and is not applied to the gate region.
  • the non-insulated gate area functions to cool the temperature of the molten metal or alloy being cast so that the temperature of such material is as low as possible when it contacts the coating. This not only serves to increase the life of the coating but also functions to minimize the casting cycle time.
  • the coating of the present invention has been herein described as a single layer, it should be appreciated that the use of multiple layers is also within the scope of the present invention.
  • a primer coating of the perfluorocarbon resin which has been treated, as is known, to improve the adhesion characteristics of such coating to the cast iron mold.
  • the second layer may then comprise an enamel coating, which readily adheres to the primer coating.
  • the primer coating can suitably have a thickness in the range of from about 0.5 to about 1 mil and the enamel coating can have a thickness of about 1.5 to 2.5 mils.
  • Each of the layers should have dispersed therein the heat-insulating particles, and the amount in the primer layer should vary from about 5 to about 30 percent by volume and in the enamel layer from about to 40 percent by volume.
  • EXAMPLE 1 A cast iron mold suitable for forming battery grids having a size of 5 2 inches X 5 inches 0.064 (length width X thickness) was treated by cleaning the surface by preheating the mold in an electric resistance furnace at 750F. for minutes. The mold was then allowed to cool to ambient conditions, the surface sandblasted to a smooth matte finish using 60 to 80 grit size silica sand and cleaned using a trichloroethylene solvent.
  • Uniform dispersion was obtained by placing the solution into a container and mixing for about 15 minutes with a conventional driven roolfThe mixed solution was then sprayed directly onto the mold surface by using compressed air spraying equipment (DeVilbiss TSA No. 502 gun). The coating was allowed to airset for several minutes and was then cured at 650F. for about 2 hours in an electric resistance furnace. The thickness of the resultant coating was about 0.5 mils.
  • talc having an average size of about 60 microns (obtained by passing the talc through a 200 mesh Tyler screen) was dispersed in a TFE enamel black and clear finish No. 851-245 polytetrafiuoroethylene resin solution (E. I. Du Pont de Nemours, Wilmington, Delaware, 41 percent by volume resin solids), with uniform dispersion being obtained by as previously described.
  • the enamel coating was sprayed on the primer coating using the hereinidentified spraying equipment. After airset and curing by heating in an electric resistance furnace at 750F. for 30 minutes, a 2.5 mil film resulted.
  • the thus-coated mold was used to form grids by passing a molten lead-antimony alloy (about 4 fa-7 percent by weight antimony) at a temperature which varied between 700-850F. into the cavity.
  • the cast grids were complete in size and had a satisfactory surface appearance.
  • the mold was used to cast grids for about a 24 hour period, and there was no evidence of the mold coat peeling.
  • a recipe of 210ml. of Teflon S 953- polytetrafluoroethylene resin solution (E. I. Du Pont de Nemours & Co., Wilmington, Delware, about 33 percent by volume resin solids)
  • 7 grams of cork flour and 50 ml. of a conventional thinner (T-8748", E. I. Du Pont de Nemours & Co., Wilmington, Delaware) were combined in solution and mixed thoroughly for about 5 minutes at the low speed level of a conventional Lightnin mixer.
  • the particle size distribution (Tyler) of the cork flour was as follows: +80 mesh 0.5 percent; 80+140 1.4 percent; l40+200 36.5 percent; -200+325 49.0 percent and 325 12.5 percent.
  • the apparent density of the recipe was about 0.7 gms/in.
  • a mold for forming objects from a molten fluid having mating sections defining an internal cavity conforming to the object shape and a gate area to receive and channel the molten fluid to the internal cavity, the mating sections being capable of parting to allow the formed objects to be removed from the cavity, the improvement which comprises a perfluorocarbon coating of from about 1.5 to 3.5 mils in thickness covering at least the internal cavity and having dispersed therein from about 10 to 40 percent, by volume, of heatinsulating particles with a size of from about 10 to 80 microns, the heat-insulating property of the particles being sufficient to delay solidification of the molten fluid until the fluid has at least substantially filled the cavity and the heat-insulating particles being sized to provide the coating surface with a roughness allowing the air in the internal cavity to escape as the molten fluid passes therethrough yet not substantially impairing the surface of the object being formed.
  • thermoplastic material formed of a member selected from the group consisting of talc, silica, alumina, diatomaceous earth and cork dust.
  • the improvement which comprises a first perfluorocarbon coating of from about 0.5 to about 1 mil in thickness covering at least the internal cavity and having dispersed therein from about 5 to 30% by volume of heatinsulating particles with a size of from about lOto microns, a second perfluorocarbon coating of about 1.5 to 2.5 mils covering the first coating and having dispersed therein from about 10 to about 10% by volume of heat-insulating particles with a size of about 10 to 80 microns, the heat-insulating property of the particles of the two coatings being sufficient to delay solidification of the molten fluid until the fluid has at least substantially filled the cavity and the heat insulating particles being sized to provide the surface of the second coating with a roughness allowing the air in the internal cavity to escape as the molten fluid passes therethrough yet not substantially impairing the surface of the object being formed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
US00170067A 1971-08-09 1971-08-09 Mold coating Expired - Lifetime US3761047A (en)

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US17006771A 1971-08-09 1971-08-09

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US (1) US3761047A (OSRAM)
JP (1) JPS5516744B2 (OSRAM)
AR (1) AR193373A1 (OSRAM)
BE (1) BE787304A (OSRAM)
BR (1) BR7200790D0 (OSRAM)
DE (1) DE2236992A1 (OSRAM)
FR (1) FR2148531B3 (OSRAM)
IT (1) IT963817B (OSRAM)
LU (1) LU65862A1 (OSRAM)
NL (1) NL7210907A (OSRAM)

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871905A (en) * 1972-11-17 1975-03-18 Hazelett Strip Casting Corp Method of forming a protective, flexible, insulating coating for covering the metal casting surface of a flexible casting belt
US3932088A (en) * 1973-08-07 1976-01-13 Bridgestone Tire Company Limited Flexible annular core used for the production of hollow toroidal rubber shells
DE3137578A1 (de) * 1981-09-22 1983-04-14 Messerschmitt-Bölkow-Blohm GmbH, 8000 München "form oder formwerkzeug, insbesondere fuer die herstellung von kunststoffkoerpern"
US4395015A (en) * 1981-12-21 1983-07-26 Margaret Reardon Cake mold
US4717115A (en) * 1986-10-14 1988-01-05 The United States Of America As Represented By The Secretary Of The Army Adjustable mold for fabricating bone replacements
US4744540A (en) * 1985-09-20 1988-05-17 Varta Batterie Aktiengesellschaft Casting mold for manufacturing grid plates for lead batteries
US4803029A (en) * 1986-01-28 1989-02-07 Pmt Corporation Process for manufacturing an expandable member
US4919388A (en) * 1985-12-20 1990-04-24 Tanazawa Hakko Sha Co., Ltd. Plastics shaping mold having patterned resin layer
US5094887A (en) * 1989-06-02 1992-03-10 Raytheon Company Method of spraying a mixture of polyol resin, methylene diphenyl diisocyanate, cork flour, and a solvent onto a surface having a primer coat so as to form an ablative coating
USH1111H (en) 1991-04-01 1992-11-03 The United States of America as represented as the Secretary of the Air Force Mold release technique for solid propellant casting tooling
US5340296A (en) * 1991-01-22 1994-08-23 Hughes Aircraft Company Resilient interconnection bridge
US5547359A (en) * 1991-07-13 1996-08-20 Saint Gobain Virtage International Apparatus for producing a glazing equipped with a peripheral frame based on a polymer
US5612066A (en) * 1995-04-11 1997-03-18 Davidson Textron, Inc. Heat insulating mold panel for a mold tool
US5614312A (en) * 1993-05-07 1997-03-25 E. I. Du Pont De Nemours And Company Wet-laid sheet material and composites thereof
US5827567A (en) * 1996-11-27 1998-10-27 Molitor; John Peter Game ball mold preparation technique and coating system
US6033724A (en) * 1996-11-27 2000-03-07 Spalding Sports Worldwide, Inc. Golf ball mold preparation technique and coating system
US6283744B1 (en) * 1998-05-29 2001-09-04 Unilever Home & Personal Care Usa, Division Of Conopco Hybrid soap stamping bars
US6291407B1 (en) 1999-09-08 2001-09-18 Lafrance Manufacturing Co. Agglomerated die casting lubricant
US6432886B1 (en) 1999-09-08 2002-08-13 Mary R. Reidmeyer Agglomerated lubricant
US20030230393A1 (en) * 2002-06-14 2003-12-18 Fujitsu Limited Metal object forming method and mold used for the same
US6676872B2 (en) 1997-12-30 2004-01-13 Lever Brothers Company, Division Of Conopco, Inc. Die and process especially for stamping detergent bars
US7767347B2 (en) 2005-05-23 2010-08-03 Johnson Controls Technology Company Battery grid
US20100209764A1 (en) * 2009-02-18 2010-08-19 Samsung Sdi Co., Ltd. Method of manufacturing secondary battery, and secondary battery manufactured by the method
US8252464B2 (en) 1999-07-09 2012-08-28 Johnson Controls Technology Company Method of making a battery grid
US8586248B2 (en) 2010-04-14 2013-11-19 Johnson Controls Technology Company Battery, battery plate assembly, and method of assembly
US9130232B2 (en) 2010-03-03 2015-09-08 Johnson Controls Technology Company Battery grids and methods for manufacturing same
US9577266B2 (en) 2007-03-02 2017-02-21 Johnson Controls Technology Company Negative grid for battery
US9748578B2 (en) 2010-04-14 2017-08-29 Johnson Controls Technology Company Battery and battery plate assembly
WO2017196973A3 (en) * 2016-05-11 2018-01-04 Establishment Labs S.A. Medical implants and methods of preparation thereof
US10170768B2 (en) 2013-10-08 2019-01-01 Johnson Controls Autobatterie Gmbh & Co. Kgaa Grid assembly for a plate-shaped battery electrode of an electrochemical accumulator battery
US10418637B2 (en) 2013-10-23 2019-09-17 Johnson Controls Autobatterie Gmbh & Co. Kgaa Grid arrangement for plate-shaped battery electrode and accumulator
US10595979B2 (en) 2014-02-17 2020-03-24 Establishment Labs S.A. Textured surfaces for breast implants
US10892491B2 (en) 2011-11-03 2021-01-12 CPS Technology Holdings LLP Battery grid with varied corrosion resistance
US11202698B2 (en) 2015-12-04 2021-12-21 Establishment Labs S.A. Textured surfaces for implants
US12451493B2 (en) 2017-01-27 2025-10-21 Cps Technology Holdings Llc Battery grid

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JPS5272342A (en) * 1975-12-15 1977-06-16 Hitachi Ltd Surface treating agent for copper
JPS5614611U (OSRAM) * 1979-07-09 1981-02-07
JPS5619976A (en) * 1979-07-26 1981-02-25 Mitsubishi Heavy Ind Ltd Production of rotor
JPS5822545B2 (ja) * 1979-10-22 1983-05-10 四国化成工業株式会社 銅および銅合金の表面処理方法
JP5190327B2 (ja) * 2008-11-04 2013-04-24 古河電池株式会社 鉛蓄電池極板用格子体の鋳造用離型剤

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US3230056A (en) * 1959-03-24 1966-01-18 United States Steel Corp Casting steel ingots
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US3473952A (en) * 1966-09-19 1969-10-21 Minnesota Mining & Mfg Fluorocarbon polymer release coating
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US2218612A (en) * 1938-08-04 1940-10-22 Willard Storage Battery Co Mold for battery grids
US2426988A (en) * 1942-11-13 1947-09-09 Aluminum Co Of America Mold coating
US2795512A (en) * 1953-08-28 1957-06-11 Gen Electric Electrostatic method and apparatus for lining molds
US3080258A (en) * 1957-07-10 1963-03-05 Polymer Corp Filling of polytetrafluoroethylene
US3154506A (en) * 1958-09-08 1964-10-27 Acheson Ind Inc Polytetrafluoroethylene-water insoluble cellulosic ester dispersions and method of forming coatings therewith
US3230056A (en) * 1959-03-24 1966-01-18 United States Steel Corp Casting steel ingots
US3279936A (en) * 1964-11-27 1966-10-18 Forestek Plating & Mfg Co Treating surfaces with perfluorocarbon polymers
US3396935A (en) * 1965-08-27 1968-08-13 Nalco Chemical Co Metal ingot mold with protective coating
US3473952A (en) * 1966-09-19 1969-10-21 Minnesota Mining & Mfg Fluorocarbon polymer release coating
US3510337A (en) * 1967-01-26 1970-05-05 Gen Motors Corp Method of plasma spraying of tetrafluoroethylene - hexafluoropropylene copolymer

Cited By (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871905A (en) * 1972-11-17 1975-03-18 Hazelett Strip Casting Corp Method of forming a protective, flexible, insulating coating for covering the metal casting surface of a flexible casting belt
US3932088A (en) * 1973-08-07 1976-01-13 Bridgestone Tire Company Limited Flexible annular core used for the production of hollow toroidal rubber shells
DE3137578A1 (de) * 1981-09-22 1983-04-14 Messerschmitt-Bölkow-Blohm GmbH, 8000 München "form oder formwerkzeug, insbesondere fuer die herstellung von kunststoffkoerpern"
US4395015A (en) * 1981-12-21 1983-07-26 Margaret Reardon Cake mold
US4744540A (en) * 1985-09-20 1988-05-17 Varta Batterie Aktiengesellschaft Casting mold for manufacturing grid plates for lead batteries
US4919388A (en) * 1985-12-20 1990-04-24 Tanazawa Hakko Sha Co., Ltd. Plastics shaping mold having patterned resin layer
US4803029A (en) * 1986-01-28 1989-02-07 Pmt Corporation Process for manufacturing an expandable member
US4717115A (en) * 1986-10-14 1988-01-05 The United States Of America As Represented By The Secretary Of The Army Adjustable mold for fabricating bone replacements
US5094887A (en) * 1989-06-02 1992-03-10 Raytheon Company Method of spraying a mixture of polyol resin, methylene diphenyl diisocyanate, cork flour, and a solvent onto a surface having a primer coat so as to form an ablative coating
US5340296A (en) * 1991-01-22 1994-08-23 Hughes Aircraft Company Resilient interconnection bridge
USH1111H (en) 1991-04-01 1992-11-03 The United States of America as represented as the Secretary of the Air Force Mold release technique for solid propellant casting tooling
US5547359A (en) * 1991-07-13 1996-08-20 Saint Gobain Virtage International Apparatus for producing a glazing equipped with a peripheral frame based on a polymer
US5614312A (en) * 1993-05-07 1997-03-25 E. I. Du Pont De Nemours And Company Wet-laid sheet material and composites thereof
US5612066A (en) * 1995-04-11 1997-03-18 Davidson Textron, Inc. Heat insulating mold panel for a mold tool
US5827567A (en) * 1996-11-27 1998-10-27 Molitor; John Peter Game ball mold preparation technique and coating system
US6033724A (en) * 1996-11-27 2000-03-07 Spalding Sports Worldwide, Inc. Golf ball mold preparation technique and coating system
US6676872B2 (en) 1997-12-30 2004-01-13 Lever Brothers Company, Division Of Conopco, Inc. Die and process especially for stamping detergent bars
US6283744B1 (en) * 1998-05-29 2001-09-04 Unilever Home & Personal Care Usa, Division Of Conopco Hybrid soap stamping bars
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LU65862A1 (OSRAM) 1973-01-15
JPS5516744B2 (OSRAM) 1980-05-06
AR193373A1 (es) 1973-04-23
IT963817B (it) 1974-01-21
BR7200790D0 (pt) 1973-04-26
BE787304A (fr) 1972-12-01
NL7210907A (OSRAM) 1973-02-13
DE2236992A1 (de) 1973-02-22
FR2148531A1 (OSRAM) 1973-03-23
JPS4825621A (OSRAM) 1973-04-03
FR2148531B3 (OSRAM) 1975-10-03

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