| 摘要 |
<p>In an injection molding apparatus in which first and second mold parts (10, 12) are combined to define therebetween an insulated section (14) of a runner system through which plastic material from a source is injected into at least one mold cavity, spring-biased plungers (21, 22, 23, 24, 25, 26, 27, 28, 29) are included in at least one of the first and second mold parts for restraining a shell (32) of plastic material within at least a part of the insulated section of the runner system from contacting any portion of at least one of the mold parts within the insulated section of the runner system other than the plungers when the first and second mold parts are separated from one another. <IMAGE></p> |
