Seidensha Electronics Co., Ltd.

Idemitsu Kosan Company, Limited

Noriaki Matsugishi

Takashi Nakajima

Toshihiro Furusawa

Atsushi Satoh

Shigemasa Tsubone

Shigeru Ogaya

A pair of thermoplastic resin members are placed on an anvil. A pressing force of a tool horn vibrating ultrasonically in a direction not perpendicular to but along upper surfaces of the pair of thermoplastic resin members is applied to the upper surfaces. The application of the pressing force of the tool horn vibrating ultrasonically allows melting of a vicinity of the upper surfaces of the pair of thermoplastic resin members. A welded structure part is formed on an unwelded structure part, thereby welding the pair of thermoplastic resin members as an overlap structure including the welded structure part arranged on the unwelded structure part. The distance and positional relationship between the pair of thermoplastic resin members after the welding are unchanged before and after the welding. The surfaces, placed on the anvil, of the thermoplastic resin members are neither burned nor discolored.

Ultrasonic welding method, structure welded by ultrasonic welding method, and ultrasonic welding device

The present invention provides a thermal caulking device which can quickly heat and cool an object to be caulked with low electrical power. Provided is a thermal caulking device which caulks a portion of a plastic partas an object to be caulked, the thermal caulking device including: a metal tiphaving a pressing partwhich presses the object to be caulked and a heating rodwhich is provided upright at a center part of the pressing part; heating meansfor heating the heating rod; a cooling pipewhich cools the heating rod; cooling fluid supply meansfor supplying a cooling fluid to the cooling pipe; a holderwhich holds the metal tipand the cooling pipeso that the cooling pipedelivers the cooling fluid toward the heating rod; and control meansfor controlling the heating meansand the cooling fluid supply means, wherein the control meansheats the pressing partfrom the heating rodby the heating means, and after the object to be caulked is thermally caulked by the pressing part, supplies the cooling fluid from the cooling fluid supply meansto the cooling pipeto cool the pressing partfrom the heating rod

Thermal caulking device

Method of extrusion molding and apparatus therefor

Disclosed is a plasticization method in which a molding material is supplied to a cylinder having a built-in screw to plasticize the molding material, and further, at least one of the cylinder and the screw is resonated to carry out the plasticization of the molding material. Also disclosed is a plasticization method in which the cylinder is vibrated by progressive waves to plasticize the molding material, and an apparatus able to carry out these plasticization methods.

Method of plasticizing molding material and apparatus therefor

An improved method for carrying out an extrusion is provided, wherein an extrusion material in a flowable state is passed through a die under a pressure to impart a desired shape thereto, and the extrusion is carried out while the die is resonated by an ultrasonic wave in such a manner that the resonance occurs at an n wavelength, wherein n is m/2 and m is a positive integer. Further, an apparatus suitable for carrying out this extrusion method is provided.

Method and apparatus for extrusion

An injection molding method in which a molding material is injected into a cavity formed in a mold to be molded. The mold is driven to resonate so that resonance occurs in the mold at n wavelengths, where n=m/2 and m is a positive integer, and an injection molding apparatus provided with a fixed mold and a movable mold; the movable mold having a cavity in one side thereof, and an ultrasonic vibration feed device being connected to the other side thereof.

Growing community of inventors

Tokyo, Japan

Noriaki Matsugishi