Method for producing an injection molded product with a grained pattern
AssigneeNaka Kogyo Co., Ltd.
InventorsKenju Iwase, Takeshi Kadoki
Life of this patent
Estimating the term…
Abstract
An injection molded product is provided on its surface with a fine grain-like pattern resembling a grain pattern of a natural wooden material. The fine grain-like pattern of the injection molded product 1 (a product part 2) is formed from a molten resin 15 comprising a first material 24 and a second material 25 having a different color, mixed in a substantially separate manner, by feeding the molten resin into a cavity 18 for molding the injection molded product in a form of plural divided streams 26 each having a generally constant width so as to allow the second material to solidify as a trace of each divided streams 26.
Claims16
A method for the preparation of an injection molded product, comprising:
- feeding a molten resin to a runner, which is formed at an upstream side of a cavity resin feed end of a cavity of a mold and extends along the cavity resin feed, the molten resin comprising a first material and a second material having a color different from that of the first material in a substantially separately mixed state;
- and
- feeding the molten resin from the runner into the cavity resin feed through a plurality of gates so that the molten resin is fed into the cavity of the mold in a form of a plurality of divided streams of the molten resin, and forming an injection molded product with a straight grain pattern in the cavity.
A method for the preparation of an injection molded product, comprising:
- feeding a molten resin composed of a mixture of a first material with a second material having a color different from that of the first material into a runner, which is formed at an upstream side of a cavity resin feed end of a cavity of a mold and extends along the cavity resin feed, with a reinforcement member set at a site of the cavity corresponding to an inner side of the injection molded product, the first material and the second material being mixed in a substantially separately mixed state;
- and
- feeding the molten resin from the runner into the cavity resin feed through a plurality of gates so that the molten resin in form of a plurality of divided streams is fed from the cavity resin feed end into a cavity resin-filling space formed within the cavity between the reinforcement member and a wall surface of the cavity and forming an injection molded product with a straight grain pattern in the cavity resin-feeding space.
Dependencies are inferred from the claim text.