Ejector mechanism and injection mold therewith

Abstract

The invention relates to an ejector mechanism and an injection mold therewith. The ejector mechanism comprises a floating thimble and an ejector block, wherein the lower end part of the floating thimble is elastically connected with a rear plate, the ejector block is positioned below a mold cavity and can be slidably sleeved on the upper part of a male mold along the longitudinal direction; and the floating thimble penetrating a male mold core insert and the upper end part of the floating thimble extends into the mold cavity, the lower end part of the floating thimble is fixedly provided with a pulling-back sleeve, and a spring providing a downwards restoring force for the floating thimble is arranged between the pulling-back sleeve and the rear plate. The ejector block is connected with a drive part, the ejector block drives an injection product and the floating thimble to upwards move when the mold is opened until the periphery of the injection product is provided with an extending space, and the floating thimble is pulled out; the plasticity of the injection product is fully utilized, and the damage of the injection product caused by forced demolding is avoided.

Description

technical field [0001] The invention relates to an injection mold and an ejection mechanism thereof. Background technique [0002] When processing some products with a ball head or barb structure by injection molding, male mold inserts and thimbles are required. The ball head structure or barb structure is formed by the thimble. After the injection molding is completed, the product needs to be separated from the mold. , the existing technology requires two ejections, which are completed by the first ejection plate, the second ejection plate and the ejector pin, the first ejection: the injection molded product is ejected together with the second ejection plate, and the second ejection, The second ejection plate does not move, and the first ejection plate and ejector pin move, forcing the end of the ejector pin to be pulled out. This process often damages the barb or ball head structure, resulting in a high defect rate of products. Contents of the invention [0003] The obj...

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Problems solved by technology

[0002] When processing some products with a ball head or barb structure by injection molding, male mold inserts and thimbles are required. The ball head structure or barb structure is formed by the thimble. After the injection molding is completed, the product needs to be separated from the mold. , the existing technology requires two ejections, which are completed by the first ejection plate, the second ejection plate and the ejector pin, the first ejection: the injection molded product is ejected together with the second ejection plate, and the second ejection, The second ejection plate does not move, and the first ejection plate and thimble move, forcing the end of the thimble to be pulled out. This process often damages the barb or ball head structure, resulting in a high defect rate of products.

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