B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/979
B29C 27/02 (1980.01)
Patent
CA 1145912
METHOD AND APPARATUS FOR MOVEMENT OF HEATED THERMOPLASTIC ELEMENTS FOR SHEAR-FUSION BONDING OF SUCH THERMOPLASTIC ELEMENTS Abstract A shear-fusion bond method is provided to create a direct fusion joinder or bond over an extended interface between like thermoplastic elastomeric elements of a block copolymer having a rubber-like center or mid-block and styrene end blocks. Such material has a high melt viscosity and does not readily flow. The interface surfaces are coupled to a heat source and heated to a fusion bonding temperature, thereby softening the interface material so that it flows under pres- sure. The elements, with the surfaces in pressurized engage- ment, are rotated relative to each other about an axis which is normal to the interface. Rotation is through an angle of at least 10 degrees to subject the softened interface material to a high rate shear force movement substantially in the plane of the interface. This decreases the viscosity and causes the interface material to bondably flow. The interface surfaces are firmly held together while in the bondably flowing state to create a shear-fusion bond in which the interface disappears. The surfaces may be separately heated on a hot platen and then located in abutting engage- ment for rotation. The surfaces may also be provided with appropriate heat generating particles. The surfaces are inductively heated from a suitable field source to soften the interface, and then rotated. -0-
355956
Heller William C.
Marks & Clerk
LandOfFree
Method and apparatus for movement of heated thermo-plastic... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for movement of heated thermo-plastic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for movement of heated thermo-plastic... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-284501