INJECTION MOLDING DIE HAVING AUTOMATIC SPRUE AND RUNNER SEPARATING DEVICE AND AUTOMATIC DISCRIMINATOR FOR PRODUCT, SPRUE AND RUNNER PARTS

摘要

PURPOSE:To separate sprue and runner parts automatically in a short time in an injection moulding die by interlocking a runner attracting rod for attracting the separated runner part with an ejector plate. CONSTITUTION:When the slide pin 1 of a fixed die 11 is retreated by a die- opening signal at the same time as a movable die 12 goes back a slide core 2 projects by a compression spring 6 toward a slide core hole 12a of the movable die 12, a valve body also retreats as far as the specified position and the runner part N, the 1st cylinder 3a and the 3rd air passage 9 are connected. The instant they are connected, a three way valve 10 is operated and the 3rd air passage is connected to the 1st air passage 7 and the sprue part S, the runner part N are attracted to a runner attractive rod 3. When the ejector pin in the movable die 12 is advanced under this state, a product part and the sprue part S, the runner part N are separated by a submarine gate and the product part falls into a movable shoot and is stored in a product case.