Nozzle, a nozzle unit, and a blasting machine

摘要

A nozzle, a nozzle unit having a plurality of nozzles, and a blasting machine equipped with the nozzle unit, which can achieve a micro-machining with a high precision and a high productivity for the blasting process. A portion for escape 13c is formed at the distal end of the ejecting portion 13 of the nozzle 11, so if the distance between the surface of the work and the nozzle 11 is shortened to suppress the broadening of the flow of the abrasives, the reflected abrasives do not remain within the space between the surface of the work and the distal end of the ejecting portion 13. Thus, a blasting process with a high precision can be achieved. Further, since two nozzles 11m and 11n can be arranged so as to correspond to the width of the surface of the work to be processed by a rotational device 16, it is possible to blast a wider area of the surface of the work while the nozzle unit 10 or the blasting machine 20 sweep one time. Thus, the high productivity of the blasting process can be achieved.

主权项

1. A nozzle unit having a plurality of the nozzles for use in a blast processing that blasts abrasives toward a surface of solar cell panel, each of the nozzles comprising:
an ejecting portion having an ejecting port for blasting abrasives, which ejecting portion is located at a distal end of the nozzle, and a portion for escape, which surrounds the ejecting portion of the nozzle, wherein the portion for escape is formed so that an outer diameter of a cross section of a portion for escape perpendicular to a flow of the blasted abrasives decreases toward the ejecting port, and wherein the portion for escape can prevent abrasives that are blasted toward the surface of a work by the nozzle and are reflected from the surface from remaining within a space between the surface of the work and a distal end of the ejecting portion of the nozzle because of collisions of the reflected abrasives with the distal end of the ejecting portion, wherein the portion for escape that surrounds the ejecting portion of the nozzle is formed of a plurality of portions for escape each portion having a constant outer diameter, wherein an outer diameter of a portion for escape near the distal end of the ejecting portion is smaller than an outer diameter of another portion for escape near a proximal end of the ejecting portion, wherein the plurality of portions for escape comprises a first circular pipe having a cylindrical surface having a constant outer diameter, the diameter of the first circular pipe being smaller than a diameter of the ejecting portion at the proximal end of the ejecting portion, and a second circular pipe having a cylindrical surface having a constant outer diameter, the second circular pipe being at the distal end of the ejecting portion and connected to the first circular pipe, the outer diameter of the second circular pipe being smaller that the outer diameter of the first circular pipe, wherein a distal end of the second circular pipe near the ejecting port is formed to have a conical surface, having an apex angle of 50-70°, wherein an inclined, tapered portion is located between the first circular pipe and the second circular pipe, and the nozzle unit further comprises: a support member for supporting the plurality of nozzles in parallel so that the nozzles can perpendicularly blast the abrasives toward the surface of the work, and a rotational device for rotating the support member about an axis perpendicular to the surface of the work, wherein a total width of areas blasted from the plurality of nozzles is adjusted by an angle at which the support member is rotated about the axis that is perpendicular to the surface of the work, which rotation is caused by means of the rotational device.