摘要:
A plate-end processing method comprises the steps of disposing a slit nozzle having a slit-shaped opening at a nozzle tip such that a longitudinal direction of the opening extends along a longitudinal direction of an edge formed along an end of a plate, and such that a distance between the tip of the nozzle and an apex of the edge is equal to 3 mm or smaller, and ejecting an abrasive with a median diameter smaller than or equal to 20 μm with an ejection pressure of 0.1 MPa to 0.5 MPa to the edge via the nozzle and collecting the ejected abrasive and the abrasive and cut dusts adhered to the plate by suctioning the ejected abrasive, the adhered abrasive and cut dusts from a front side of an ejecting direction of the abrasive at an average flow rate of 30 m/s or higher.
摘要:
A cutting method by sandblasting in which cutting through of a workpiece and/or formation of a through-hole in the workpiece are/is performed by forming a resist on a plate-shaped workpiece and projecting abrasive against the workpiece to cut a portion of the workpiece where no resist is formed, comprises the steps of: forming the resist in a predetermined pattern on a front surface and a back surface of the workpiece symmetrically between the front and back by inkjet printing, and projecting the abrasive against each of the front and back surfaces of the workpiece to make a cut from the front surface side communicate with a cut from a back side at an approximately intermediate position of a thickness of the workpiece.
摘要:
The present invention provides a light-transmitting member that not only exhibits high antiglare properties but also shows a transmission image with a sharp outline. A reflecting surface of a light-transmitting member formed of an optically transparent material, for example, a glass plate, has minute hubbly surface profile formed therein by blasting the reflecting surface with an abrasive or the like to mill the surface. The minute hubbly surface profile in the reflecting surface are formed so that, when the reflecting surface is divided into minute compartments of a prescribed size and a histogram is constructed on the basis of measurement values obtained by measuring the height in each compartment, the probability density of the mode in the histogram is 10 to 30%, and the variance (σ2) in the histogram, calculated on the basis of the heights, is less than 0.4 (μm2).
摘要:
A method for producing a metal mask for screen printing is provided, in which dross that is deposited at the time a boring operation is conducted via a laser beam is removed, without causing warpage or bending. The method for producing a metal mask for screen printing includes steps of: forming openings in the metal plate by melting the metal plate at positions irradiated by the laser beam; and ejecting an abrasive onto the other surface of the metal plate after the openings are formed. The abrasive ejected in the abrasive ejection step is one having a predetermined flat shape (plate-shaped abrasive), so as to form a plate shape having a flat surface, or an elastically deformable abrasive, with an average grain diameter of a dispersed or carried abrasive grain being 1 mm to 0.1 μm, and which is ejected at an incident angle of equal to or less than 80 degrees with respect to the other surface of the metal plate, and at an ejection pressure of 0.01 MPa to 0.7 MPa or at an ejection speed of 5 m/sec to 150 m/sec, so as to slide along the other surface of the metal plate.
摘要:
A blasting chamber capable of conducting painting on a workpiece subsequent to a blasting process in the same working chamber is provided. A dust collection unit 20 that ventilates a main unit 10 during blasting work and a ventilation unit 30 that ventilates a main unit during a painting step are provided. A side wall 11 of the main unit is provided with an entrance 11a and an opening-and-closing member 11b that opens/closes the entrance, the dust collection unit is provided so as to project from a roof panel 15 to a floor panel 16 at a position closer to an other side wall 12 that is opposed to this side wall so as to partition the interior of the main unit, and a working space 10a and a ventilation duct 10b are defined in the main unit. A roof panel 15 above a working space has air suction holes 17 formed therein, and an intake opening 22 that communicates between the dust collection unit and the ventilation duct is provided. The side wall is provided with an opening 12a that communicates between the ventilation unit and the ventilation duct, and during the blasting process, ventilation is conducted with the dust collection unit with the entrance closed, and during painting, ventilation is conducted with the ventilation unit with the entrance opened.
摘要:
A method for producing a metal mask for screen printing is provided, in which dross that is deposited at the time a boring operation is conducted via a laser beam is removed, without causing warpage or bending. The method for producing a metal mask for screen printing includes steps of: forming openings in the metal plate by melting the metal plate at positions irradiated by the laser beam; and ejecting an abrasive onto the other surface of the metal plate after the openings are formed. The abrasive ejected in the abrasive ejection step is one having a predetermined flat shape (plate-shaped abrasive), so as to form a plate shape having a flat surface, or an elastically deformable abrasive, with an average grain diameter of a dispersed or carried abrasive grain being 1 mm to 0.1 μm, and which is ejected at an incident angle of equal to or less than 80 degrees with respect to the other surface of the metal plate, and at an ejection pressure of 0.01 MPa to 0.7 MPa or at an ejection speed of 5 m/sec to 150 m/sec, so as to slide along the other surface of the metal plate.
摘要:
A grinding method is provided which can grind a processing surface of a workpiece by a blast processing without use of specific abrasives to obtain a glossy surface such as a mirror surface. Abrasives together with compresses fluid are injected to the processing surface of the workpiece with an incident angle θ to meet the condition shown in the following equation: 0
摘要:
An apparatus for supplying a constant amount of abrasive which can supply even dry ice particles, ice particles, or the like as abrasive in a constant amount is provided. In order to take out abrasive contained in measuring holes 21 of a rotating disc 20, an abrasive mixing section 40 for blowing a compressed gas into each of the measuring holes 21 has a cylinder 41′ which opens toward one surface of the rotating disc at the position where the measuring holes are formed. A piston 43′ is inserted into the cylinder. A fluid channel 45 opens toward the cylinder 41′ through the intermediary of the rotating disc 20 and whose opening rim 45a is in sliding contact with another surface of the rotating disc 20. One of the cylinder 41′ and the fluid channel 45 communicates with a compressed-gas supply source through the intermediary of a compressed-gas introduction path 52. The other one of the cylinder 41′ and the fluid channel 45 communicates with the abrasive transport path 51. The piston 43′ has a through-hole 43a passing therethrough in such a manner as to coincide with the position where the measuring holes are formed.
摘要:
An abrasive has a plate shape with a flat surface, in which a maximum diameter of the flat surface thereof is in the range of 0.05 mm to 10 mm, and 1.5 to 100 times as the maximum diameter as thick of the abrasive, and the blast processing method is one in which this abrasive is ejected by being inclined at an incident angle with respect to a surface of a product to be treated. The ejected plate-shaped abrasive slides along the surface of the product to be treated while having the flat surface in slidable contact with the surface of the product to be treated which is an object surface to be treated, so that the surface of the product to be treated is flattened by removing the peaks only, without increasing the depth of the valleys of the roughness curve.
摘要:
An abrasive that can impart a mirror finish, glossiness, or the like to a surface of a workpiece by blasting is provided. A crosslinked polyrotaxane compound having a network structure where crosslinking points are circular molecules of polyrotaxane and also having abrasive grains dispersedly mixed therein is obtained by causing chemical bonding between the circular molecules of the polyrotaxane in a state where the abrasive grains and the polyrotaxane are mixed. Then, the crosslinked polyrotaxane compound is granulated to a predetermined grain diameter to obtain a gel-like abrasive where a part of the dispersedly mixed abrasive grain is exposed at the surface. By using the thus-obtained gel-like abrasive in blasting by projecting the abrasive at an angle tilted with respect to a surface of a workpiece, mirror finishing or the like is possible without making the surface of the workpiece pearskin-like.