Process for manufacturing plastic parts

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5525284
SERIAL NO

08450906

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Spherical particles having a diameter between 0.007' and 0.040' are formed from melt extruded thermoplastic material suitable for casting on a heated mold surface and melting thereon to form a thin layer of material that is cooled and removed from the mold surface as a part having a porosity less than a visually observable threshold. The process includes the steps of providing microspheres formed of blended and melt extruded thermoplastic, plasticizers (if necessary) and pigment additives that constitute less than 5% by weight of the blend and shaped as a smooth round spherical particle. The microspheres may then be distributed as a predetermined charge of such microspheres against the heated casting surface to melt the microspheres as a layer of thermoplastic material having a porosity less than 0.003 inches and thereafter cooling and removing the non-porous layer from the casting surface.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
BAYER MATERIALSCIENCE LLCPITTSBURGH, PA53

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Grimmer, Robert A Berwick, ME 13 171

Cited Art Landscape

Patent Info (Count) # Cites Year
 
COLLINS & AIKMAN AUTOMOTIVE INTERIORS, LLC (1)
* 4878827 Plastic shell for foam moldings 22 1988
 
Toray Silicone Company, Ltd. (1)
* 5124090 Method for the preparation of silicone gel spheres 6 1989
 
DAVIDSON RUBBER COMPANY, INC. (1)
* 4389177 Modular slush molding machine 22 1981
 
Ex-Cell-O Corporation (3)
* 4623503 Slush molding method with selective heating of mold by air jets 41 1984
* 4621995 Multiple zone heating of molds 28 1985
* 4722678 Rotational mold with valved charge box 21 1987
 
KRAUSS-MAFFEI AG (1)
* 4979888 Apparatus for molding an article from a fusible synthetic resin 23 1989
 
FSP INTERNATIONAL, INC. (1)
* 4767299 Rotational molding machine 4 1987
 
Daicel-Huels Ltd. (1)
* 5244984 Process for producing polymer powder 6 1991
 
DAVIDSON TEXTRON INC. (2)
* 4923657 Method for making plastic parts 26 1988
* 5106285 Air and water delivery system for a shell mold 22 1991
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
SUMITOMO CHEMICAL COMPANY, LIMITED (1)
6805822 Method for producing thermoplastic elastomer powder 0 2001
 
INTERNATIONAL AUTOMOTIVE COMPONENTS GROUP NORTH AMERICA, INC. (1)
* 2005/0272,330 Method for embedding a distinguishing aesthetic and/or functional surface feature into a panel surface 1 2004
 
INDUSTRIE ILPEA S.P.A. (1)
* 5900196 Process and apparatus for forming items having layers with controlled thickness 3 1997
 
COVESTRO LLC (2)
7560515 PVC alloy for use in air bag doors 0 2006
* 2006/0252,885 PVC Alloy For Use In Air Bag Doors 0 2006
 
Chroma Corporation (3)
6433086 Method of rotational molding using a resin blend and the resulting molded objects 2 1999
6682685 Method of rotational molding using a resin blend 1 2000
6833410 Method of rotational molding using a resin blend and the resulting molded objects 4 2002
 
COLLINS & AIKMAN PRODUCTS CO. (1)
* 2005/0064,178 Cloth texture cover material 5 2004
 
KONAL ENGINEERING AND EQUIPMENT INC. (1)
6284182 Molding process employing heated fluid 7 1999
 
BENECKE-KALIKO AG (1)
* 6312633 Method of producing a slush membrane with a predetermined breaking line for an airbag flap 3 1998
 
ALLERGAN, INC. (5)
* 6602452 Rotational molding of medical articles 37 2001
7628604 Rotational molding system for medical articles 4 2008
* 2008/0181,981 ROTATIONAL MOLDING SYSTEM FOR MEDICAL ARTICLES 1 2008
8431179 System and method for molding soft fluid-filled implant shells 2 2009
* 2010/0178,414 SYSTEM AND METHOD FOR MOLDING SOFT FLUID-FILLED IMPLANT SHELLS 5 2009
 
MAGNA INTERIOR SYSTEMS INC. (2)
* 6082989 Slush molding apparatus 4 1998
6461561 Slush molding process 1 2000
 
TEXTRON AUTOMOTIVE COMPANY INC. (3)
6524509 Method for casting multicolored parts for automotive interior applications 7 2000
6632525 Material and method for manufacturing plastic parts 2 2000
* 2004/0054,085 Pvc alloy for use in air bag doors 1 2003
 
BAYER MATERIALSCIENCE LLC (2)
* 5654102 Material for manufacturing plastic parts 5 1995
* 5998030 Material for manufacturing plastic parts 7 1997
* Cited By Examiner