Front mold thread core pull mechanism

Abstract

The invention relates to a front mold thread core pull mechanism. The front mold thread core pull mechanism comprises a gear ring located on the outer side of a core. The outer side of the gear ring is engaged with a big gear wheel. The middle of the big gear wheel is connected with a power driving mechanism. A fixed gear is arranged at the end of the core in a sleeving manner. A thread clamping insert is arranged on the outer side of the fixed gear. The fixed gear is positioned by the thread clamping insert. Inner threads are arranged in an inner hole of the fixed gear. Spiral threads used incooperation with the inner threads are arranged outside the core. The power driving mechanism comprises an intermediate gear connected with the middle of the big gear wheel, a straight rack engaged with the intermediate gear, and an oil cylinder connected with the straight rack. According to the front mold thread core pull mechanism, by utilizing one thread combination, when a mold is opened, theoil cylinder plays the role as pull force, the thread combination drives the core to move upwards through the mutual thread cooperation between the fixed gear and the core, front mold thread core pull is achieved in the end, and the embarrassing situation that for some products, mold design cannot be completed because a reverse mold cannot be used is avoided.

Description

technical field [0001] The invention relates to the field of mold equipment, in particular to a threaded core-pulling mechanism for a front mold. Background technique [0002] Core pulling is used to deal with the position on the parting surface of the product that cannot be demolded. It belongs to the "barb treatment system" and is a structure of the mold. Definition of core pulling: the mechanism that ensures the smooth demoulding of the product, also called the slider. For example, there is a hole on the side of a plastic part. After the mold is opened, if the core of the hole is not removed, the product cannot be ejected. [0003] At this time, the mold structure must adopt the structure of the slider, and the core of the hole is made movable, and the inclined guide column is used to cooperate with the fixed mold, and the slider moves with the opening or closing of the mold. This movement is called core pulling. [0004] At present, the known threaded core-pulling mec...

AI Technical Summary

Problems solved by technology

However, this kind of mechanism will inevitably have limitations. It is necessary to require that the product can only pull the core in one direction. If there are cores at both ends, the design cannot be completed.

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