To provide a mold for injection molding which can produce a resin molding of high quality without generating deformation and a hurt when the molding having a deep shape and a thin wall shape such as a recess in a boss part is demolded after being molded.
In the mold 20 for injection molding which obtains the molding having a thin wall part with the recess etc., formed in the thick wall boss part by packing a molten resin, a movable mold 40 has a first forming pin 50 forming the recess etc., of the boss part, a sleeve 52 which forms the base end part of the boss part and into which the first forming pin 50 is inserted/arranged, a main template 56 forming the inward region of the surface on the movable mold 40 side of the thin wall part and a stripper 58 forming the peripheral edge part of the surface on the movable mold side of the thin wall part. When the molding is demolded from the movable mold 40, the sleeve 52 has a first driving mechanism 70 which separates the molding from the first forming pin 50 and the main template 56 and a second driving mechanism 80 which demolds the molding by the stripper 58 after the action of the sleeve 52.
UENO HIROSHI
Tadashi Takahashi
Masakazu Aoyama
Akihiko Eguchi
Hideyuki Sugiura
Yasuhiko Murayama
Noriko Yanai