Method and apparatus for applying flux for use in brazing aluminum material
AssigneeCalsonic Kansei Corporation
InventorsMakoto Kouno, Ryoji Matsunami, Tatsuya Fujiyoshi
Life of this patent
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Abstract
Fluoride-based flux is uniformly dispersed in and mixed with synthetic resin, which has fluidity at room temperature and sublimes at a temperature lower than a brazing temperature, so as to constitute 40 to 70 wt. % of the mixture, thereby producing coating material. This coating material is applied to coating belts which undergo rotation and is transferred from the coating belts to the surface of the aluminum material. The coating material has high viscosity and stably adheres to the transferred areas.
Claims21
A flux coating apparatus comprising:
- a pair of feed rollers to be rotated in opposite directions while remaining in contact with each other;
- an inlet section disposed above a contact portion between said pair of feed rollers so as to store a coating material comprising a fluid mixture containing flux;
- a dam member disposed along and in sliding contact with end faces of the pair of feed rollers so as to prevent the coating material from flowing laterally from said inlet section;
- and
- a pair of endless coating belts which are spaced at a required interval so as to be mutually opposed and rotated in opposite directions, wherein at least one of said pair of feed rollers is in contact with at least one of said pair of endless coating belts, thereby transferring the coating material to a surface of said endless coating belt, and wherein the surface of the endless coating belt coated with the coating material comes into contact with an introduced component to be coated with the coating material, to thereby coat a surface of the component with the coating material during a course of feeding of the component in a single direction.
A flux coating apparatus comprising:
- a pair of endless coating belts which are vertically spaced at a predetermined interval so as to be mutually opposed and rotated in opposite directions, said endless coating belts being brought into contact with top peaks of an aluminum corrugated fin for a heat exchanger to be introduced between a clearance between opposing portions of said endless coating belts, and applying a coating material comprising a fluid mixture containing flux to the top peaks during a course of feeding the corrugated fin in a single direction;
- and
- a pair of pressure plates for pressing the opposing portions of said endless coating belts against the top peaks of the corrugated component.
A method for manufacturing a heat exchanger, comprising the steps of:
- applying a coating material comprising a fluid mixture containing flux exclusively to top peaks of corrugated fins;
- stacking a plurality of said corrugated fins and a plurality of flat tubes in an alternating manner to thereby constitute a core;
- inserting ends of said flat tubes of the core into tube insertion holes of header tanks;
- and
- heating the core, thereby brazing together the top peaks of the corrugated fins and the flat tubes.
A flux coating apparatus comprising:
- a pair of endless coating belts which are vertically spaced at a predetermined interval so as to be mutually opposed and rotated in opposite directions, said endless coating belts being brought into contact with an upwardly projecting surface of an aluminum component to be introduced between a clearance between opposing portions of said endless coating belts, wherein the apparatus is configured to apply a coating material comprising a fluid mixture containing flux to the upwardly projecting surface during a course of feeding the aluminum component in a single direction;
- and
- a pair of pressure plates for pressing the opposing portions of said endless coating belts against the upwardly projecting surface of the component.
Dependencies are inferred from the claim text.