Servo-motor-driven lifting device for one-step injection-blowing hollow molding machine

Abstract

A servo-motor-driven lifting device for a one-step injection-blowing hollow molding machine comprises a mounting base, wherein a main shaft is arranged on the mounting base; a turntable is mounted on the main shaft; a servo motor is arranged in the mounting base; an output shaft of the servo motor is connected with a guide sleeve; and a ball screw is arranged in the guide sleeve and connected with the main shaft through a connecting mechanism. When an ascending action of the turntable is required, a control system gives a command, the servo motor executes the action, the output shaft drives the guide sleeve to rotate while rotating, rotation of the guide sleeve is changed into linear movement through transmission of the ball screw, and further, the ascending action of the turntable is realized. Vice versa, the required descending action of the turntable is realized through transmission of the guide sleeve and the ball screw. According to the scheme, the servo motor serves as the driving force, and the ball screw serves as the transmission mechanism, so that the response time is short, and quick, accurate and steady ascending and descending of the turntable are realized. Braking can be performed through reverse current when the turntable is in place, so that the ascending and descending actions are quick and steady and the impact is small.

Description

technical field [0001] The invention relates to a lifting device driven by a servo motor of a one-step injection blow molding machine, which belongs to the field of plastic machinery. Background technique [0002] The core component of the one-step injection blow molding machine is a triangular turntable, and the three end faces of the turntable correspond to three stations (ie, injection molding, blow molding, and demoulding). These three stations are independent of each other, so can be performed simultaneously. The mandrel is installed on the three end surfaces of the turntable, and the parison is formed on the mandrel by the 120° index rotation of the turntable, and then blown by air to form it, and finally demolded. The entire action cycle process includes: mold opening, turntable up, turntable in, turntable down, and mold closing. In order to shorten the cycle time, it is necessary to move the turntable up and down quickly and smoothly. However, the existing injecti...

AI Technical Summary

Problems solved by technology

For medium and large equipment, the hydraulic drive method exposes defects such as slow response and large impact when the action is in place, which in turn causes unstable lifting action and high noise.

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