Injection mold for engine oil bottom pad

Abstract

The invention discloses an injection mold for an engine oil bottom pad. The injection mold is characterized by comprising a rubber injection molding mold body in which a four-layer template structure is adopted, product cavities are formed between a first-layer template and a second-layer template, product cavities are formed between the second-layer template and a third-layer template, and product cavities are formed between the third-layer template and a fourth-layer template; the product cavities in each layer are connected with corresponding branch rubber injection runners provided with adjusting screws; the caliber of each branch runner is changed by adjusting the height of the adjusting screws on each branch rubber injection runner, and therefore the rubber injection amount of each branch runner is adjusted; and the rubber injection molding mold body is internally provided with main rubber injection runners penetrating all the layers of branch rubber injection runners of the whole mold. The injection mold is simple in structure, capable of ensuring the stable product quality and high in yield, and compared with products of the same type, the performance of the injection mold is more superior.

Description

technical field [0001] The invention relates to the technical field of auto parts production, in particular to an injection mold for an engine oil pan. Background technique [0002] The production of pure rubber seals such as engine oil bottom pads adopts compression molds, ordinary injection molds and cold runner injection molds. Due to the low operating efficiency and unstable product quality during the production of molding dies, it was gradually eliminated. Therefore, at present, the production of pure rubber seals such as engine oil pads is mostly produced by rubber injection molds. In order to improve production efficiency, the rubber injection mold has gradually developed from the early two-plate mold (one-layer product) to three-plate mold (two-layer product). In order to further improve production efficiency, it will try to increase to four-plate mold (three-layer product). However, due to the increase in the number of mold layers, the rubber flow distance increas...

AI Technical Summary

Problems solved by technology

However, due to the increase in the number of mold layers, the rubber flow distance increases, and the influence of flow resistance causes a large difference in the amount of glue injected into the multi-layer formwork. It is necessary to frequently change the rubber flow path to make up for it. The amount of mold processing is huge and the cost is high.

Therefore, it is difficult to promote the four-plate injection mold

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