Patent ID: 8182255
Filing Date: 2012-05-22
Classification: B29C,B33Y

Abstract:
1. A device for selective deposition of molten plastic material, which comprises a melting chamber communicated with a passage for feeding plastic material and at least one outlet opening for supplying molten plastic material dropwise or continuously, said chamber housing a portion susceptible to vibration of a sonotrode of an ultrasonic transducer, an elongated casing enveloping said sonotrode and said sonotrode vibrating in a longitudinal direction with respect to said casing, wherein said passage for feeding plastic material includes a feeding mechanism configured to transport said plastic material to the chamber; said feeding mechanism comprises a spindle governed in a controlled manner and located in an annular cavity delimited between an outer cylindrical wall provided by the inner face of the casing and the sonotrode wherein the annular cavity and the spindle are coaxial to the longitudinal axis of the sonotrode, said melting chamber is located in an end portion of said elongated casing enveloping said sonotrode, and one end of the melting chamber being opposite the tip of the sonotrode.