| 主权项 |
1. A mold vacuum valve device comprising:
a first mold including an inner side surface and a mounting hole formed therethrough and extending through said inner side surface of said first mold, said mounting hole having a plurality of ball-receiving hole portions at two opposite lateral sides thereof, each of said ball-receiving hole portions extending along a first direction; a second mold having an inner side surface abutting against said inner side surface of said first mold and formed with a shaping cavity, a runner passage in fluid communication with a side of said shaping cavity, and vacuum passage in fluid communication with an opposite side of said shaping cavity, said shaping cavity being defined by a serrated bottom wall surface formed with a plurality of shaping teeth arranged along said first direction and disposed between said runner passage and said vacuum passage, said shaping cavity in said second mold cooperating with said mounting hole in said first mold to define an accommodating space; a sliding block disposed movably within said accommodating space and including a head portion having a serrated side surface and a non-serrated side surface that is opposite to said serrated side surface and that is contactable with said inner side surface of said first mold, a body portion extending upwardly from said non serrated side surface of said head portion and disposed within said mounting hole, and two opposite lateral surfaces formed with a plurality of ball-receiving grooves aligned respectively with said ball-receiving hole portions of said mounting hole in said first mold, said serrated side surface of said head portion being complementary to said serrated bottom wall surface, said head portion cooperating with said second mold to define a shaping clearance therebetween, said shaping clearance having we opposite ends in fluid communication with said runner passage and said vacuum passage, respectively; and a rolling unit including a plurality of balls each engaging a respective one of said ball-receiving hole portions and a respective one of said ball-receiving grooves, and a plurality of position-limiting screws threaded respectively into ends of said ball-receiving grooves to confine said balls within said ball-receiving grooves; wherein said inner side surface of said first mold and said non-serrated side surface of said head portion are flat, and are parallel to said first direction. |
