| 摘要 |
PURPOSE:To reduce the generation of voids, by providing a piercing hole to a pot so as to communicate from the inner wall of the pot to the outer wall thereof. CONSTITUTION:The piercing hole 13 communicating from the inner wall of a pot to the outer wall thereof is provided in close vicinity to the part above the upper end of a tablet 3 in such a state the tablet 3 is placed on a lower mold 6. Further, an exhaust port 14 for exhausting the air in the space 10 between a head part 4 and the tablet 3 to the outside of an apparatus through the piercing hole 13 is provided to the pot. Therefore, when a plunger 5 is pushed down, the air in the space 10 can be gradually and smoothly exhausted through the piercing hole 13 and the exhaust port 14 without being compressed, and only a molten resin is introduced into a cavity 9 under pressure through a runner 8 and voids due to the involution of air in the resin are not generated. By this method, the humidity resistance of a molded body can be enhanced and the generation of cracks caused by voids can be reduced and reliability can be enhanced. |
