| 摘要 |
MULTI-LAYERED-BLOW-MOLDED CONTAINER AND METHOD FOR FORMING AIR INLET HOLE A process for forming one or more air intake holes in a blowmolded container comprising an outer layer (11) of a synthetic resin that forms an outer shell in a fixed shape and an inner layer (12) of a synthetic resin that forms an inner bag to be laminated with this outer layer (11) in a peelable 20 manner, wherein the outer layer (11) is cut through with a punch-cutter (43) at a predetermined position or positions of a neck (2) to form one or more air intake holes (14), wherein the punch-cutter (43) to be used has a cylindrical blade (44) at the tip, and also has a hooking portion or portions (45), which is/are disposed on an 25 inner peripheral surface of the cylindrical blade (44) and which perform a function of hooking into a portion of the outer layer (11) that has come inside the cylindrical blade (44) so as to prevent the cylindrical blade (44) from slipping out of this portion of the outer layer (11) at a time when the cylindrical blade (44) is moved backward, 30 the cylindrical blade (44) is pressed forward until a blade edge (44p) comes to a position quite close to an inner surface of the outer layer (11), and at this position, the outer layer (11) is not yet cut through completely, but there still remains a circular uncut portion (11 b) ahead of the blade edge (44p), then, the cylindrical blade (44) is moved backward, and a cut piece (11 a) 35 inside the cylindrical blade (44) is also moved backward along with the uncut portion (11 b) because of the function of the hooking portion or portions (45) that can hook into a portion of the outer layer(1 1) that has come inside the cylindrical blade (44) so as to prevent the cylindrical blade (44) from slipping out of this portion of the outer layer (11), and the uncut portion (11 b) is broken due to this backward movement, and the cut piece (11 a) is taken out in a completely cut shape so that the air intake hole (14) is cut out as a through-hole. |
