Sprue puller and reflecting mirror mold

Abstract

The invention discloses a sprue puller and a reflecting mirror mold and belongs to the field of BMC (Bulk Molding Compound) injection molds. The sprue puller is characterized in that a material pulling head at the top end part of the sprue puller is in a pagoda shape with a plurality of layers; each layer consists of stepped columns formed by connecting two cylinders with large upper parts and small lower parts; the top end of the material pulling head is a conical spire. The sprue puller is arranged in the reflecting mirror mold; the bottom end of the sprue puller is movably arranged on the movable mold side; the top end part of the sprue puller penetrates through the movable mold side and extends into the fixed mold side. According to the sprue puller and the reflecting mirror mold disclosed by the invention, a product is pulled at the movable mold side by the material pulling head in the pagoda shape at the top end part of the sprue puller during mold opening, so that sticking of afixed mold is prevented; finally, the product is demolded by ejection of the movable mold.

Description

technical field [0001] The invention relates to the field of injection molds, in particular to a pulling rod and a mirror mold. Background technique [0002] BMC material is the abbreviation of Bulk molding compounds, that is, bulk molding compound, which is often called unsaturated polyester bulk plastic mold in China, and has good physical properties, electrical properties and mechanical properties. The BMC injection mold is somewhat different from the usual thermoplastic and thermosetting injection molding, mainly because the shrinkage rate of BMC is low, which is only one-third of the dryness. [0003] Because BMC bulk molding compound has excellent electrical properties, mechanical properties, heat resistance, chemical corrosion resistance, and adapts to various molding processes, it can meet the performance requirements of various products, so it is more and more popular among users. favorite. [0004] In the automotive industry, BMC is also widely used, such as larg...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problem that BMC injection molding products are easy to stick to the mold and difficult to release the mold in the prior art, and provide a pull rod and reflector mold, which effectively prevents the mold from sticking to the fixed mold.

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