Injection molding mechanism for high-performance single-cylinder injection molding machine

Abstract

The invention relates to an injection molding mechanism for an injection molding machine, in particular to an injection molding mechanism for a high-performance single-cylinder injection molding machine. The mechanism comprises a base, a screw arranged on the base and an injection molding oil cylinder device arranged on the rear side of the screw, wherein the rear end of the screw is fixedly connected with a coupling which is driven to rotate by a cycloid oil motor; and the injection molding oil cylinder device drives the cycloid oil motor and the coupling to do high-speed horizontal linear motion through differential injection. The cycloid oil motor is directly connected with the screw of the injection molding machine through the coupling, so that a few transmission parts are used, the transfer distance of rotating power is short, and the mechanism has a simple structure and is high in injection accuracy; and a piston rod of the oil cylinder device does not rotate during injection, so that a rotating seal is not needed, and sealing performance can be improved.

Description

technical field [0001] The invention relates to an injection molding mechanism of an injection molding machine, specifically an injection molding mechanism of a single-cylinder injection molding machine. Background technique [0002] The motor of the injection molding mechanism of the existing single-cylinder injection molding machine is generally installed on the rear end of the injection molding oil cylinder device through the motor seat. When the motor is working, the rotational power must be transmitted to the screw through a series of transmission devices inside the injection molding cylinder. Therefore, the structure of the internal transmission device of this injection molding machine is more complicated and the pre-molding rotational power transmission distance is longer, making the injection volume The accuracy is difficult to control. In addition, the piston rod of the oil cylinder device of most single-cylinder injection molding machines drives the screw to d...

AI Technical Summary

Problems solved by technology

When the motor is working, the rotational power must be transmitted to the screw through a series of transmission devices inside the injection molding cylinder. Therefore, the structure of the internal transmission device of this injection molding machine is more complicated and the pre-molding rotational power transmission distance is longer, making the injection volume The accuracy is difficult to control

In addition, the piston rod of the oil cylinder device of most single-cylinder injection molding machines drives the screw to do reciprocating horizontal and linear motions, and at the same time, it also performs rotational motions, resulting in a gap between the cylinder body and the piston rod and between the cylinder head and the piston rod Rotary seals are used. The processing of such sealing parts is difficult and expensive, and there are defects such as short service life of sealing parts and inconvenient maintenance.

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