Carbide rod screening nozzles
AssigneeInternational Business Machines Corporation
InventorsGerald Stanley Andris, Yves Darves-Bornoz
Life of this patent
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Abstract
A degradation resistant nozzle for a screening, extrusion or similar processes has a tip surface formed by one or more rods of a material having an increased hardness relative to the body portion of the nozzle. The rods are preferably of circular cross-section and formed of tungsten carbide. The rods are removably attached in preferably circular grooves in the tip of the nozzle body. The removability of the rods facilitates reworking of the nozzle when wear occurs since new rods can quickly and inexpensively be substituted. The degradation resistant nozzle also decreases wear and scoring of stencils used in screening processes and thus increases the useful life thereof.
Claims21
A method of making a nozzle having a tip including a step of
- attaching at least one rod to a groove formed in said nozzle tip, and
- adhering said rod to said nozzle tip with an adhesive.
A method of reworking a nozzle having a tip including at least one rod carried in a groove in said tip of said nozzle, said method including steps of
- removing said at least one rod from said groove,
- attaching at least one rod to said groove formed in said nozzle tip, and
- adhering said rod to said nozzle tip with an adhesive.
A nozzle structure including
- a body portion having at least one groove formed at a tip thereof,
- at least one rod attached to said groove in said body portion,
- wherein said rod is a tungsten carbide rod.
A nozzle structure including
- a nozzle body portion having an elongated opening in a tip thereof and at least one groove having a predetermined cross-sectional shape formed adjacent a major side of said elongated opening,
- at least one rod, having a share conforming, in part, to said predetermined cross-sectional shape of said groove, said at least one rod being located in said at least one groove,
- means for attaching said at least one rod to said at least one groove, wherein said predetermined cross-sectional shape is an arc of a circle, and wherein said rod has a circular cross-sectional shape having a circumference and said arc of said circle extends beyond one-half of said circumference.
Dependencies are inferred from the claim text.