Hakko Corporation

Takashi Uetani

Takashi Nagase

Hiroyuki Masaki

Norihisa Sekimori

Takanori Naito

Kayoko Yoshimura

Yoshimoto Teraoka

Masayuki Miyabe

Mitsuhiko Miyazaki

Ichiro Kawakatsu

A soldering iron (and a desoldering iron) with a replaceable tip, which is releasably securable on the forward heat-conducting end of a soldering (or desoldering) iron heat assembly. The tip has a heat conducting core in a tip cap. Methods of manufacturing and using the tip are also disclosed. A method of manufacturing a replaceable soldering or desoldering iron tip can comprise preparing a cap having a base opening and at least substantially filling the cap through the base opening with a heat conducting material so that a tip core is formed in the cap, the tip core having a core face at the base opening.

Soldering iron with replaceable tip

A soldering iron (and a desoldering iron) with a replaceable tip, which is releasably securable on the forward heat-conducting end of a soldering (or desoldering) iron heat assembly. The tip has a tapered heat conducting core in a tip cap. The face of the core can have a depression for mating engagement with a protrusion of the heat-conducting end. Also, the face can lie in the rear plane of the tip cap. An assembly which allows for the easy removal and application of a replacement tip can include a sleeve with tightening bolt, a coil spring sleeve, or a slotted compressible sleeve. The tip can thus be replaced after it has worn out, and the heat assembly unit need not be replaced until it has burnt out. Methods of manufacturing and using the tip are also disclosed.

A soldering iron tip having a copper or copper alloy core and a metal particle sintered member connected to the core to transfer heat therefrom to form a working soldering tip. The sintered member can be manufactured by powder metallurgy from a base material (iron, nickel and/or cobalt particles) and an additive (silicon, copper, silver, tin, boron and/or carbon particles) where needed. The sintered member can be formed as a cap which is fitted onto the working tip with a silver paste sandwiched therebetween, a brazing filler metal ring is positioned between an abutment shoulder and the cap, flux applied to the joint and the cap brazed into place. A metal, cermet or ceramic coating sprayed on the outer surface of the core, except for the (masked) working tip end, is not wettable by solder. An Ag&#x2014;Al&#x2014;Cu alloy coating layer in the rearwardly-disposed cavity improves heat conduction from the heater therein.

Method of soldering iron tip with metal particle sintered member connected to heat conducting core

Oxide remover for soldering tips

Soldering iron tip with metal particle sintered member connected to heat conducting core

In an iron tip for a soldering iron, composed of Fe plated copper or copper alloy, an outer surface excluding a solder coating portion in a leading end portion of the iron tip is plated with Cu in a film thickness range of approximately 10 to 50 &mgr;m, the surface is coated with a mixture of Al particles and flux, only the Al particles are melted in an inert gas atmosphere, and the surface is modified into a surface with a Cu&mdash;Al alloy coated layer having a high Al concentration. As a result, without using Cr plating, it is possible to provide an electric soldering iron having an excellent resistance to oxidation under high temperature environment and a high heat conductivity.

Iron tip and electric soldering iron

A soldering iron device has a gas passage formed by enclosing a soldering iron tip,of an electric soldering iron with double pipes,and,to make a nozzle. By providing projections A, B and C in the spacing between said double pipes, the double pipes are prevented from any eccentricity and biasing, and the velocity of an inert gas G to be supplied is made slow to ensure that the gas is jet through the nozzle tip end. Further, engulfing of oxygen in the atmospheric air can be suppressed, whereby it is possible to prevent defective wetting of solder due to high temperature oxidation of the soldering iron tip and to suppress high temperature oxidation of workpieces and flux cored solder alloy and flux, and excellent solderability is obtained.

Growing community of inventors

Osaka, Japan

Takashi Uetani