초록 ▼

The method of joining two thermoplastic workpieces by ultrasonic energy along respective confronting surfaces includes providing one workpiece surface with an energy director while the opposing other workpiece surface contacted by the energy director exhibits a rough textured surface, rather than a

The method of joining two thermoplastic workpieces by ultrasonic energy along respective confronting surfaces includes providing one workpiece surface with an energy director while the opposing other workpiece surface contacted by the energy director exhibits a rough textured surface, rather than a conventional smooth surface, and an article manufactured according to such method.

대표청구항 ▼

An article of manufacture formed by: positioning two thermoplastic workpieces in juxtaposed, stacked relationship with one another along confronting surfaces, one of said surfaces having an energy director extending from such surface for contacting the confronting surface of the other workpiece, the

An article of manufacture formed by: positioning two thermoplastic workpieces in juxtaposed, stacked relationship with one another along confronting surfaces, one of said surfaces having an energy director extending from such surface for contacting the confronting surface of the other workpiece, the confronting surface of such other workpiece being of a rough texture; applying a compressive force to said workpieces for urging said confronting surfaces into contact with one another; applying ultrasonic vibratory energy to said workpieces to cause softening of the thermoplastic material of said energy director and the material on said other workpiece surface contacted by said energy director for providing molten thermoplastic material at the interface between said workpieces, and ceasing the application of ultrasonic energy while briefly maintaining said workpieces under a compressive force for causing said molten thermoplastic material to rigidify and form a weld.