Apparatus and method for machining hole for optical film
Provided are a hole machining apparatus for an optical film, comprising: a clamping part for fixing a plurality of optical films in stacked laminated state; and a machining part for performing a hole operation on a predetermined region of the plurality of optical films so as to sequentially pass through the optical films along the laminated direction in a state where the optical films are fixed to the clamping part, wherein upon the hole operation, the machining part comprises a drill part provided to perform a primary hole machining operation and a bite unit provided to perform a secondary hole operation in the primary hole operation region. Also provided is a hole machining method for an optical film, comprising clamping a plurality of laminated optical films at a predetermined pressure in the hole machining apparatus.
1. A method of hole machining an optical film using a hole machining apparatus,
wherein the hole machining apparatus comprises:
a clamping part for fixing a plurality of optical films in a laminated state; and
a machining part for performing a hole operation on a predetermined region of the plurality of optical films so as to sequentially pass through the optical films along the laminated direction in a state where the optical films are fixed to the clamping part,
wherein the machining part comprises:
a drill bit provided to perform a primary hole operation; and
a cutting bite provided to perform a secondary hole operation in the primary hole operation region,
wherein the hole machining apparatus further comprises an alignment part for aligning the positions of the drill bit and the cutting bite upon the primary and secondary hole operations,
wherein the method comprises:
clamping the plurality of optical films in a laminate state at a predetermined pressure in the hole machining apparatus;
first punching through the plurality of optical films in a laminated state in order along the lamination direction using the drill bit; and
second punching the first punched region with the cutting bite,
wherein hole machining operation is performed so that the centers of the holes coincide with each other upon the first punching and the second punching,
wherein the plurality of optical films comprise a polarizing plate,
wherein the clamping pressure is 0.1 to 0.2 MPa,
wherein upon the first punching, the drill bit operates at 30,000 to 50,000 RPM and operates at a feeding speed of 2000 to 5000 mm/min,
wherein upon the second punching, the cutting bite operates at 30,000 to 50,000 RPM and operates at a feeding speed of 2000 to 5000 mm/min, and
wherein the hole machining operation is performed so that the diameter of the first punched hole is smaller than the diameter of the second punched hole.