Maro Publications

Casting

Patents with Abstracts

*10/29/2012

Maro Topics

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Patents with Abstracts

4. U.S. Patent 8,536,254 (September 17, 2013), “Curable Casting Compound Containing Keratin Fibers and Plastic Moulded Parts Produced therefrom,”  Andreas Hajek, and Thomas Marz (BLANCO GmbH + Co KG, Oberderdingen, Germany).

Highly filled casting plastics have been used for a long time for kitchen sinks, kitchen worktops, washbasins and bathtubs.  The high loading of inorganic fillers gives adequate stiffness, temperature resistance and scratch resistance but increased brittleness.  Hajek, and Marz found that adding 0.1 to 0.5 wt% keratin fibers increased the impact resistance without changing the other components of the material or properties. 1 to 5 mm uncoated sheep’s wool fibers were used.   The casting compound consisted of polymerizable acrylic monomers  and 0 to 85 wt% inorganic fillers.

3. 8,287,780 
Method for manufacturing fresnel lens
 
Huang of Hon Hai Precision Industry Co., Ltd., Taiwan, developed a method for manufacturing a Fresnel lens by (a. providing a mixture for forming the Fresnel lens; (b. providing a lower mold on which the mixture is disposed; (c. vacuumizing the mixture on the lower mold; (d. providing an upper mold to exert a pressure on a top surface of the mixture; (e. vacuumizing the mixture on the lower mold again; and (f. heating the mixture on the lower mold to harden the mixture. (RDC 10/29/2012)

2. 8,216,504 
Molding apparatus
 
Robinson of TAMKO Building Products, Inc. Missouri developed a molding for casting shingles.  This molding apparatus consists of regions that receive a direct flow of a molding material feed such that external flow channels are not needed.  The article molding regions are formed into front sides of opposed "A" and "B" surface mold tools that, when moved into a mating relationship with one another, form closed molding cavities.  Theses article molding regions have a body bounded by a perimeter that establishes an outer edge for an article molded in the one of the closed molding cavities.  With at least the "A" surface mold tool, a port is coupled with the body of each article molding region to establish a direct pathway is through which the molding material feed flows to enter the article molding regions, and thus the closed molding cavity, without having to flow along the tool front sides outside of the article molding regions. A distribution channel extends to each port to deliver the molding material feed and a moveable blocking pin is provided for each port to alternately prevent the molding material feed from flowing through the respective port to reach the closed molding cavity and allow the molding material to flow through the respective port to reach the closed molding cavity. (RDC 7/25/2012)

1. 8,192,786 
Method to ensure the removability and/or the mobility of an element cast in a sealing compound
 
Schuster, Schoen and Stocker of Siemens, Germany, developed a method to ensure the removability of an element cast in a casting compound for a module of a medical apparatus by coating the element with a meltable substance before the casting, the meltable substance is melted by heating after casting to remove the element.  (RDC 6/25/2012)

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Interested!!
Bookmark this page to follow future developments!.
(RDC 6/5/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 6/25/2012.