Two-stage ejecting mechanism of compression mold

Abstract

The invention discloses a two-stage ejecting mechanism of a compression mold. The two-stage ejecting mechanism is mounted on a female mold of the compression mold, and the female mold and a male mold are folded to form a mold cavity; the two-stage ejecting mechanism of the compression mold comprises a lower movable mold plate, a supporting plate, pushing rods and a support from top to bottom, and a ribbed portion of the bottom of the female mold is formed by the lower movable mold plate; the female mold is placed on the supporting plate, and the pushing rods penetrate through holes in the supporting plate and are fixedly connected to the lower movable mold plate; the support is fixedly connected to the lower portion of the supporting plate; and the ejecting mechanism is characterized by further comprising a pushing plate in sliding connection with the pushing rods. A plurality of fixed pushing rods are fixedly connected to the pushing plate, and penetrate the supporting plate and the lower mold plate, and when the upper end faces of the fixed pushing rods are subject to mold assembly, the fixed pushing rods are aligned with the bottom face of the mold cavity; shaft shoulders are arranged on the pushing rods, and the diameter of the shaft shoulders is larger than the diameter of through holes; and the lower portions of the pushing rods are sleeved with springs, and the springs support the pushing rods on the pushing plate through the shaft shoulders. The two-stage ejecting mechanism has the beneficial effects that ejecting deformation of plastic parts is avoided, the structure is simple, and implementation is easy.

Description

technical field [0001] The invention relates to the field of plastic compression molding molds, in particular to a two-stage push-out mechanism for a compression mold. Background technique [0002] In the production of plastic products, especially the use of plastic raw materials with poor molding fluidity, compression molding technology is often used. Compression molding is also known as compression molding and compression molding. Its working principle is: add loose plastic raw materials into the high-temperature cavity and feeding chamber, and then close the mold at a certain speed, and the plastic melts and flows under the action of heat and pressure. , and quickly fill the entire cavity, solidify and shape at the same time, and then open the mold to take out the product to become the required plastic part with a certain shape. The mold used for compression molding is called a compression mold, which usually includes a concave mold and a convex mold, and the two are com...

AI Technical Summary

Problems solved by technology

[0003] In order to take out the product from the compression mold, the compression mold needs to be equipped with a push-out mechanism. The previous push-out mechanism pushes the push plate around the parting surface at one time to push out, but if the surface of the plastic product is ribbed, the ribbed side faces the mold. The tightening force is relatively large. If you simply use the push plate around the parting surface to push out, because the required push force is greater, it will often cause the deformation of the plastic part, and the quality of the plastic part cannot be guaranteed.

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