Double-color mold sliding block core-pulling delay mechanism and operating method thereof

Abstract

The invention relates to a double-color mold sliding block core-pulling delay mechanism and an operating method thereof. The double-color mold sliding block core-pulling delay mechanism is characterized by comprising a double-color mold and a sliding sleeve arranged on the double-color mold and used for sleeving the integral periphery of a finished outer convex column. The double-color mold is further provided with a stop column arranged on the outer end face of the finished outer convex column in a jacking mode. A liftable jacking block is arranged between the lower portion of the stop column and the lower portion of the sliding sleeve. The end face of the side, close to the sliding sleeve, of the jacking block is provided with two platform faces, and transition of the two platform faces is achieved through an oblique plane. A track groove is formed in the end face of the side, close to the stop column, of the jacking block and comprises two planes, and transition of the two planes is achieved through an arc face. The mechanism and the operating method are applied to a mold of an automobile rain sensor holder product made of cycloolefin copolymer (COC), and the phenomenon that as being difficult to demould, a rotary shaft of the automobile rain sensor holder is snapped is well avoided.

Description

[0001] Technical field: [0002] The invention relates to a core-pulling delay mechanism of a two-color mold slide block and a working method thereof. [0003] Background technique: [0004] Due to the technical characteristics of the two-color mold, when the product has an undercut feature (external convex column), the mold design cannot adopt the inclined guide column + shovel structure, but the eccentric ejector rod is used instead of the inclined guide column to realize the core-pulling action of the slider; The slider core mechanism with the eccentric ejector instead of the inclined guide post solves the problem that the side core cannot be demoulded when the first color is formed in the two-color mold. However, due to the large demoulding force when the slider is demoulded, it is easy to cause undercuts The characteristic is sticky slider, and when it is serious, it will appear as whitening or breaking. The material COC (Cycloolefin Copolymer) is very suitable as a car...

AI Technical Summary

Problems solved by technology

[0004] Due to the technical characteristics of the two-color mold, when the product has an undercut feature (external convex column), the mold design cannot adopt the inclined guide column + shovel structure, but the eccentric ejector rod is used instead of the inclined guide column to realize the core-pulling action of the slider; The slider core mechanism with the eccentric ejector instead of the inclined guide post solves the problem that the side core cannot be demoulded when the first color is formed in the two-color mold. However, due to the large demoulding force when the slider is demoulded, it is easy to cause undercuts Characteristic sticky slider, in severe cases, it will appear as whitening, breaking, etc.

The material COC (Cycloolefin Copolymer) is very suitable as a car rain sensor bracket due to its excellent light transmission and weather stability, but due to the very poor toughness of this material, it is very easy to cause the shaft (undercut feature) to break when demoulding

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