Maro Publications

Composites' Molding

Patents with Abstracts


Maro Encyclopedia


Patents with Abstracts

3. 8,303,887 
Apparatus for the infusion of resin into a preform in a closed mould
De Vita; Vincenzo (Andria, IT), Beneventi; Francesco (Foggia, IT), Raffone og Alenia Aeronautica S.p.A., Italy developed a tool for the infusion of a resin into a preform made of fiber material including a mould which can be closed around the preform and in the body of which at least one inlet duct is formed to allow resin to be injected into the mould so that the resin can be infused into the preform.  At least one reservoir which can contain the resin, is also formed in the body of the mould and is connected to the at least one inlet duct.  The mould can be inserted in an autoclave and the reservoir is configured to permit the transfer of the resin from the reservoir to the inlet duct under the effect of the temperature and of the pressure that are produced in the autoclave, thus allowing the resin to be injected into the mould. (RDC 12/12/2012)

2. 8,277,708 
Compression molding thickness regulator
Edwards of Honda, Japan, developed a mechanical thickness regulator for a compression mold.  A regulator can include a thickness regulator pin received by a recess in an extendable and retractable relation. The regulator pin can include a tip, or can be contacted with a tip, defining a predetermined distance from the pin to the end of the tip, the distance defining a gap of well known dimensions for receiving and molding polymer melt. (RDC 10/4/2012)

1. 8,257,075 
Carbon composite mold design
Choiniere et al of Apple, Inc., Cailfornia, developed  mold with inserts and embedded fluid lines to facilitate cooling during part formation for carbon fiber composites.  A permanent release coating along a mold component surface that contacts the carbon fiber and resin components facilitates the release of the finished part from the mold component.  Guide pins and guide pin receiving holes facilitate accurate alignment of mold components.  Ejector pins within respective ejector pin shafts help eject a finished part from a respective mold component.  An ejector pin shaft cover transfers force from an ejector pin to eject a finished part and also prevents substantial passage of resin into the ejector pin shaft.  A fluid actuated ejection system provides fluid based mechanical forces to the ejector pins to facilitate finished part ejection. (RDC 9/7/2012)


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(RDC 6/5/2012)


Roger D. Corneliussen

Maro Polymer Links
Tel: 610 363 9920
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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

** Date of latest addition; date of first entry is 9/7/2012.