Plastic injection mold for realizing simultaneously core pulling

Abstract

The invention discloses a plastic injection mold for realizing simultaneously core pulling. The plastic injection mold comprises a fixed mold, a movable mold and more than one mold cavity, wherein the more than one mold cavity is positioned between the fixed mold and the movable mold; each mold cavity is provided with a thread core; the thread core is provided with external threads; the fixed mold is provided with a channel from which fused plastic can pass through; the movable mold comprises a first mold base, a second mold base and a third mold base sequentially from the end (close to the fixed mold) of the movable mold; the first to third mold bases are detachably connected together; and the second mold base is provided with guide sleeves with the number equal to that of the thread cores, the thread cores and the guide sleeves are connected in a sliding manner, tooth cores are arranged at the ends (far away from the fixed mold) of the thread cores, the third mold base is provided with tooth core sleeves matched with tooth cores, the thread cores are provided with driven gears, the movable mold is also provided with a driving gear meshed with the driven gears, and the driving gear is connected with a driving device. The mold has the advantages of being high in precision, small in volume and stable to work, the quality of produced products is high, and the threads of the products after forming have small errors.

Description

technical field [0001] The invention belongs to the technical field of plastic machinery, and relates to an injection mold, in particular to an injection mold capable of simultaneously pulling cores from a plurality of threaded injection molded parts. Background technique [0002] When the injection mold for manufacturing plastic parts with internal threads is demoulded, due to the existence of internal threads, if the threaded core is directly pulled out for forced release, it is easy to damage the internal thread structure of the plastic parts. For the manufacture of plastic parts with internal threads, the current common core-pulling method is to use the threaded core to rotate the core, that is, when the core is pulled, the oil motor drives the threaded core to rotate along the internal thread line of the plastic part to come out. The core method can effectively protect the internal thread. However, for a mold with multiple productions (one pair of molds can produce mul...

AI Technical Summary

Problems solved by technology

This mold has a good effect when the number of injection molded parts is low, but when the number of injection molded parts is large, on the one hand, due to the excessive number of gears, the structure is complicated and the volume of the mold is large; Gear transmission, the synchronization of each injection molded part during core pulling is poor, and the product quality is difficult to guarantee

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