초록 ▼

A two step process for ultrasonically welding together first and second thermoplastic pieces and welding a membrane between these two pieces. The first piece comprises an annular bead, the second piece comprises an annular energy director. The method comprises first ultrasonically cutting and sealin

A two step process for ultrasonically welding together first and second thermoplastic pieces and welding a membrane between these two pieces. The first piece comprises an annular bead, the second piece comprises an annular energy director. The method comprises first ultrasonically cutting and sealing the membrane to the first piece using an anvil comprising an annular projection and at the same time creating a groove in the first piece. The annular bead is ultrasonically melted and thus welds the membrane to the first piece. The first and second pieces are then brought together so that the groove and energy director are aligned. Under ultrasonic action, the energy director melts within the groove creating a strong weldment without any voids or material flashing.

대표청구항 ▼

A two step method for ultrasonically welding two pieces of thermoplastic material together with a membrane between said pieces, each piece having a peripheral rim; a first said piece having a continuous annular bead on the inside of the rim of said first piece; a second of said pieces having a conti

A two step method for ultrasonically welding two pieces of thermoplastic material together with a membrane between said pieces, each piece having a peripheral rim; a first said piece having a continuous annular bead on the inside of the rim of said first piece; a second of said pieces having a continuous annular energy director on the inside of the rim of said second piece; said method comprising a. placing said membrane over the inside of said first piece such that said membrane covers said bead, ultrasonically cutting said membrane and creating a groove in the rim of said first piece, and ultrasonically melting said bead so as to weld said membrane to said first piece; and b. bringing together said first and second pieces so that said energy director lines up with said groove, and ultrasonically melting said energy director so that it fills said groove creating a strong weld between said pieces.