Single-cylinder-driven rotary band-type brake mechanism

Abstract

The invention discloses a single-cylinder-driven rotary band-type brake mechanism comprising a movable template, a band-type brake oil cylinder, a connecting rod, a holding nut and a rotary disc. The connecting rod comprises a first connecting rod, a second connecting rod and a third connecting rod. The rotary disc comprises a first rotary disc, a second rotary disc, a third rotary disc and a fourth rotary disc which are arranged sequentially and distributed in a rectangular shape. The first connecting rod is located between the first rotary disc and the second rotary disc. The second connecting rod is located between the second rotary disc and the third rotary disc. The third connecting rod is located between the third rotary disc and the fourth rotary disc. End covers are fixed to the movable template. The rotary discs are arranged on the end covers correspondingly and rotationally in a matched mode. The holding nut is located below the rotary discs and comprises at least two arc-shaped blocks. The single-cylinder-driven rotary band-type brake mechanism provided by the invention is long in service life, low in cost, simple to machine and low in precision requirement.

Description

technical field [0001] The invention relates to a mechanism of a two-platen injection molding machine, in particular to a rotary brake mechanism driven by a single cylinder. Background technique [0002] Since the mold clamping mechanism of the two-plate plastic injection molding machine has no crankshaft and connecting rod mechanism, the movement pairs of the mechanism are greatly reduced. Due to the reduction of mechanical vulnerable parts, the service life of the machine is greatly prolonged. In addition, the mold clamping mechanism of the two-plate plastic injection molding The crankshaft connecting rod mold clamping mechanism lacks a template, which greatly reduces the cost of the machine for medium and large machines, because the movable module is separated from the tie rod when the mold is opened, and the movable template passes through the tie rod when the mold is clamped under high pressure. One mechanism is locked, and the two-platen plastic injection molding machi...

AI Technical Summary

Problems solved by technology

[0002] Since the mold clamping mechanism of the two-plate plastic injection molding machine has no crankshaft and connecting rod mechanism, the movement pairs of the mechanism are greatly reduced. Due to the reduction of mechanical vulnerable parts, the service life of the machine is greatly prolonged. In addition, the mold clamping mechanism of the two-plate plastic injection molding The crankshaft connecting rod mold clamping mechanism lacks a template, which greatly reduces the cost of the machine for medium and large machines, because the movable module is separated from the tie rod when the mold is opened, and the movable template passes through the tie rod when the mold is clamped under high pressure. One mechanism is locked, and the two-platen plastic injection molding machine of this mechanism is called a brake mechanism or a turn-brake mechanism. According to the prior art, a two-platen injection molding machine turn-gate mechanism is disclosed on the website of the State Intellectual Property Office. The driving device drives four turnstile engaging parts at the same time, and the turning turnstile engaging parts are connected synchronously through linkage links, mainly through the driving device to drive one turngate engaging part to rotate, and then link the remaining three turnstile parts through the connecting rod, so that The turnstile nut is always exposed outside, and dust is easy to enter it. The wear rate of the turnstile nut is high and the service life is short. At the same time, it is necessary to ensure the machining accuracy of the entire turnstile meshing parts. The processing is troublesome, the cost is high, and the precision requirements are high.

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