Injection mold for processing elongated push rod

Abstract

The invention discloses an injection mold for processing an elongated push rod. The injection mold comprises four pairs of fixed mold kernels and movable mold kernels, wherein each pair of the mold kernels are uniformly distributed on mold plates; two movable mold intermediate insert blocks are arranged in the middle of the movable mold plate; fixed mold spray nozzle frames are arranged in corresponding positions on the fixed mold plate; a plurality of spray nozzles are arranged in each fixed mold spray nozzle frame; the spray nozzles are communicated with sprue gates of mold cavities; a hot melt in a hot runner system is injected into the mold cavities through the spray nozzles; a plurality of the mold cavities are arranged on each pair of the mold kernels, and each mold cavity is provided with a sprue gate; each mold cavity is formed by combining a plurality of pairs of insert blocks according to the thickness of an injection-molded piece; an ejection mechanism comprises a plurality of ejector rods; and the ejector rods are respectively arranged at the head ends and tail ends of the mold cavities, and two or more ejector rods are arranged at the middle parts of the mold cavities and the thick-thin transition sections of the mold cavities. The injection mold for processing the elongated push rod, disclosed by the invention, has a compact structure and can effectively improve the processing yield, improve the working efficiency and reduce the product rejection rate.

Description

technical field [0001] The invention relates to a mold, in particular to an injection mold for processing slender push rods, and belongs to the technical field of injection molds. Background technique [0002] At present, with the wide application of plastic products, the existing injection molds can no longer meet the growing needs of production and life, and the injection molds are also improving towards high output, high efficiency and high quality. However, there are still some injection molded parts that cannot improve the processing and molding efficiency because of their own shape and structure. For example attached figure 1 Shown in is the push rod used in the field of medicine for intravenous injection syringes. Its overall thickness is uneven. The diameter at the head section Q is 4 mm, and the diameter at the rear section H is 2 mm. When using existing injection molds to process such thin and long injection molded parts, it is difficult to achieve high output; ...

AI Technical Summary

Problems solved by technology

When using existing injection molds to process such thin and long injection molded parts, it is difficult to achieve high output; moreover, when the injection molded parts are demolded, the ejector mechanism often breaks the injection molded parts, which not only fails to improve the efficiency of processing and molding, but also causes a large scrap rate

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