US 7,601,289 B2
Two-sides in-mold decoration molding die and method of manufacturing a molded product with such molding die
Koji Hamano, Kyoto (Japan); Naoto Toyooka, Kyoto (Japan); and Haruki Adachi, Amagasaki (Japan)
Assigned to Nissha Printing Co., Ltd., Kyoto (Japan)
Appl. No. 10/589,666
PCT Filed Feb. 15, 2005, PCT No. PCT/JP2005/002231
§ 371(c)(1), (2), (4) Date Aug. 16, 2006,
PCT Pub. No. WO2005/077638, PCT Pub. Date Aug. 25, 2005.
Claims priority of application No. 2004-041374 (JP), filed on Feb. 18, 2004.
Prior Publication US 2007/0120289 A1, May 31, 2007
Int. Cl. B29C 45/14 (2006.01); B29C 45/18 (2006.01)
U.S. Cl. 264—266  [425/112; 425/126.1; 425/190] 9 Claims
OG exemplary drawing
 
6. A method of manufacturing a two-sides in-mold decoration molded product utilizing a molding die including a first mold and a second mold having a first cavity forming face and a second cavity forming face, respectively, the first cavity forming face and the second cavity forming face being provided with a first cavity and a second cavity, respectively, the method comprising:
disposing a first decoration film on the first mold so as to move in a first direction, parallel to the first cavity forming face where the first cavity is provided, while passing over the first cavity, wherein the first decoration film has a width that covers the first cavity, but is smaller than the first cavity forming face;
disposing a second decoration film on the second mold so as to move in a second direction intersecting the first direction and parallel to the second cavity forming face while passing over the second cavity, located in a second decoration film passing region, such that the second decoration film does not overlap a protruding section, protruded from a surface of a second decoration film non-passing region of the second cavity forming face, with a runner through which to supply a molten resin injected through a sprue to the second cavity at a position corresponding to a portion of a second decoration film non-passing region of the second cavity forming face of the second mold, wherein the second decoration film has a width that covers the second cavity, but is smaller than the second cavity forming face, and the second decoration film passing region is different from the second decoration film non-passing region;
clamping the first mold and the second mold with the two decoration films held-between the first mold and the second mold, such that an upper surface of the protruding section and a region of the first decoration film, where the first decoration film does not overlap the second decoration film, contact each other, so as to define, in the runner, a molten resin path for guiding the molten resin to pass between the first decoration film and the second decoration film, preventing the molten resin from leaking; and
injecting the molten resin, via the runner, into the first cavity and the second cavity so as to form a resin molded product and integrally adhere the first decoration film and the second decoration film to a surface of the resin molded product.