Low penetration-force pinmat for perforating an uncured laminate sheet

A low penetration-force pinmat (20) has been provided for perforating an uncured laminate sheet (14). The pinmat (20) includes a mat portion (28) and a series of pins (26) extending from the mat portion (28). Each pin (26) includes a shank portion (38) and a tip portion (40) extending from the shank...

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Bibliographische Detailangaben
1. Verfasser:	OBRACHTA KEVIN L
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CUTTING CUTTING-OUT DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING,CUTTING-OUT, STAMPING-OUT OR SEVERING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HAND CUTTING TOOLS INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS PERFORATING PERFORMING OPERATIONS PUNCHING SEVERING SEVERING BY MEANS OTHER THAN CUTTING SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STAMPING-OUT TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A low penetration-force pinmat (20) has been provided for perforating an uncured laminate sheet (14). The pinmat (20) includes a mat portion (28) and a series of pins (26) extending from the mat portion (28). Each pin (26) includes a shank portion (38) and a tip portion (40) extending from the shank portion (38). The tip portion (40) has one or more facets (42) that are positioned adjacent to one or more edges (44). In one embodiment, three facets (42) are adjoined by three edges (44). These facets (42) are positioned at a predetermined facet angle (52) relative to a longitudinal axis (50) of the shank portion (38). Additionally, adjacent facets (42) are positioned at a predetermined blade angle (54) relative to each other so as to define a sufficiently sharp edge (44) for cutting and fracturing the fibers (32). The edges (44) are positioned at a predetermined edge angle (48) relative to the longitudinal axis (50) of the shank portion (38). These angles (46, 48, 52) facilitate the edges (44) in concentrating stress within the fibers (32) so as to fracture those fibers (32) at substantially low tensile loads and allow the pin (26) to penetrate the sheet (14) at a substantially low pressure.