Solder leveling method and apparatus
    5.
    发明授权
    Solder leveling method and apparatus 失效
    焊锡平整方法及装置

    公开(公告)号:US4869418A

    公开(公告)日:1989-09-26

    申请号:US269137

    申请日:1988-11-09

    IPC分类号: B23K1/08 H05K3/34

    摘要: A method and apparatus for producing flush solder fill over recessed pins and over passage holes in circuitized substrates. A substrate carrying rack is immersed in a vessel of molten solder after it has been similarly immersed in a flux bath. While in the molten solder, the rack is vigorously agitated. The rack is then withdrawn from the molten solder and is pivoted upwardly while positioned over the molten solder. Simultaneously, an anvil is rotated from a home position to an impact position at precisely the correct moment. With the solder still molten on the substrate surfaces, the rack is then permitted to descend and is positively biased to strike the anvil thereby dislodging any excess molten solder. A unique supporting arrangement for the rack insures that only a minimum of mass acutally impacts against the anvil while insuring the effectiveness of the operation. Each cantilevered arm from which a rack is suspended is temporarily supported during the impacting operation after which the support member is withdrawn. Also, a solder pot of unique design and operation is provided to assure rapid, complete heating of substrates while eliminating contamination thereof by dross and oxides.

    摘要翻译: 一种用于在凹陷销上产生冲洗焊料的方法和装置,以及在电路化基板中的通孔上。 在将基底承载架类似地浸入焊剂熔池中之后,将其浸入熔融焊料的容器中。 在熔融焊料中,架被剧烈搅动。 然后将架子从熔融焊料中取出,并且在定位在熔融焊料上方的同时向上枢转。 同时,在正确的时刻,砧座从起始位置旋转到冲击位置。 由于焊料仍然在基板表面上熔化,则允许齿条下降并且被正向偏压以撞击砧座,从而移除任何多余的熔融焊料。 机架的独特配套安排确保在确保操作的有效性的同时,只有最小的质量对砧座产生严重的影响。 在冲击操作期间暂时支撑悬挂架的每个悬臂,支撑构件被抽出之后。 此外,提供独特的设计和操作的焊料罐,以确保快速,完全地加热基板,同时消除浮渣和氧化物的污染。