Anti-backlash mode adjusting device

Abstract

The invention discloses an anti-backlash mode adjusting device which comprises a base, a mode adjusting gearwheel arranged on the end face of the base, a mode adjusting motor for driving the mode adjusting gearwheel, and multiple pull rods positioned at the periphery of the mode adjusting gearwheel, wherein a mode adjusting nut is arranged at the position, which is positioned on the outer side of the mode adjusting gearwheel, of each pull rod; intermediate gears which drive the mode adjusting gearwheel and the mode adjusting nuts are arranged on the end face of the base, and each intermediate gear comprises a first intermediate gear and a second intermediate gear arranged on two sides of each mode adjusting nut; the gear side clearances between each first intermediate gear and each mode adjusting nut and between each first intermediate gear and the mode adjusting gearwheel in the anticlockwise rotation direction of each first intermediate gear are zero; and the gear side clearances between each second intermediate gear and each mode adjusting nut and between each second intermediate gear and the mode adjusting gearwheel in the clockwise rotation direction of each second intermediate gear are zero. The two intermediate gears are additionally arranged between the mode adjusting gearwheel and each mode adjusting nut of an original mode adjusting mechanism, and reciprocating running clearance is eliminated through the two gears, so that error accumulation caused by multi-stage transmission is avoided. Therefore, the mode adjusting position is accurate, and the mode locking force is controllable.

Description

technical field [0001] The invention is used in the field of mold adjustment for injection molding machines, and in particular relates to a backlash elimination mold adjustment device. Background technique [0002] The mechanical system of the injection molding machine is mainly composed of the opening and closing mold, the mold adjusting device and the injection mechanism. The opening and closing mold and the mold adjusting device are the main parts of the mechanical system, which determine the important performance parameter of the injection molding machine - the clamping force. The tie-rod injection molding machine adjusts the size of the clamping force through the mold adjustment device, and its actual clamping force. When adjusting the mold, the motor decelerates to drive the four mold adjusting nuts installed at the ends of the four tie rods to rotate, and drives the back seat to move back and forth to adjust the distance between the movable and fixed platen, so as to ...

AI Technical Summary

Problems solved by technology

[0004] 1. It needs to go through two-stage gear one-way transmission, and the machining error of each stage will accumulate

[0005] 2. The mold adjustment is often reciprocating and needs to be adjusted back and forth. However, due to the accumulation of errors, the template position is different after backward adjustment and forward adjustment with the same number of teeth.

[0006] 3. The clamping force is determined by the stretching amount of the tie rod, and the deformation of the tie rod of a few tenths of a millimeter corresponds to a clamping force of tens of tons, which makes it difficult to adjust the required clamping force

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