Injection molding apparatus for inserting atypical stiffener

An injection molding apparatus for inserting a stiffener including an upper mold provided with an upper core and an under mold provided with an under core for manufacturing an injection molding product by receiving synthetic resin melt and curing in a state in which the stiffener whose size is not constant is inserted, the injection molding apparatus comprising:

• an elastic clamper device supported by the under mold, embedded in the under core, interlocked with a size of the stiffener, and elastically pressurizing a first side and a second side of the stiffener to hold the stiffener to be inserted into a predetermined position between the upper core and the under core by the elastic clamper device when the synthetic resin melt is introduced,
• wherein the elastic clamper device includes a first side elastic clamper elastically pressing the first side of the stiffener and a second side elastic clamper elastically pressing the second side of the stiffener to elastically press the stiffener between the first side elastic clamper and the second side elastic clamper,
• wherein each of the first side elastic clamper and the second side elastic clamper include:
• a vertical supporter mounted and erected on the under mold;
• and
• a horizontal elastic bundle mounted on an upper end portion of the vertical supporter and embedded in the under core to elastically pressurize the first side and the second side of the stiffener between the first side elastic clamper and the second side elastic clamper,
• wherein each vertical supporter of the first side elastic clamper and the second side elastic clamper is erected to be inclined from a lower end portion of the under mold toward an upper end portion of the under mold so that the horizontal elastic bundle of the first side elastic clamper and the horizontal elastic bundle of the second side elastic clamper are configured to elastically pressurize the stiffener by the first side elastic clamper and the second side elastic clamper while the horizontal elastic bundle of the first side elastic clamper and the horizontal elastic bundle of the second side elastic clamper are in the under core, and
• wherein the elastic clamper device further include a tilt bracket connected at a middle end portion of the under mold and including inclination holes which are obliquely formed at a predetermined angle such that the inclination holes are close at lower portions of the inclination holes each other and remote at upper portions of the inclination holes each other.