Circulating lubrication oil passage structure of toggle mechanism of an injection molding machine

Abstract

A toggle mechanism of an injection molding machine consists of upper and lower toggle assemblies, which are pivoted to a fixed tail support at a first end, and a movable mold support of an injection molding machine at a second end; each of the toggle assemblies has two toggles pivoted together, each of which has pivotal holes on two ends; pivotal rods are passed through corresponding pivotal holes of the toggles to pivot the toggles together; pivotal rods are used to pivot the toggle assemblies to the fixed tail support and the movable mold support; each pivotal rod has oil holes in radial and axial directions; the oil holes communicate with the pivotal holes of the toggles, and each toggle has an internal oil passage communicating with its pivotal holes; lubricating oil will circulate in the toggle mechanism after conduits and filtering barrels are connected to the pivotal rods.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the invention[0002]The present invention relates to a circulating lubrication oil passage structure of a toggle mechanism of an injection molding machine, more particularly one, which allows lubricating oil to circulate in a toggle mechanism consisting of upper and lower toggle assemblies for lubricating the pivotal joints of the toggle mechanism.[0003]2. Brief Description of the Prior Art[0004]Toggle devices are major mechanisms of injection molding machines. A toggle mechanism of an injection molding machine is usually fitted on a fixed support member and a movable mold support of the machine for moving the movable mold support so as to open / close the mold. Referring to FIG. 6, the inventor of the present invention developed an improvement (A) on a toggle mechanism of an injection molding machine once, which comprises a fixed support plate 1, a fixed toggle 10, a moving toggle 20, a pivotal rod 30, sleeves 40, and leakage prevention rin...

AI Technical Summary

Benefits of technology

[0006]It is a main object of the invention to provide an improvement on a circulating lubrication oil passage structure of a toggle mechanism of a molding machine to overcome the above-mentioned problem. The toggle mechanism of the present invention consists of upper and lower toggle assemblies, which are pivoted to a fixed tail support at a first end, and a movable mold support of an injection molding machine at a second end. Each of the toggle assemblies has two toggles pivoted together, each of which has pivotal holes on two ends thereof; pivotal rods are passed through corresponding pivotal holes of the toggles to pivot the toggles together. And, pivotal rods are used to pivot the toggle assemblies to the fi

Problems solved by technology

The above structure has a disadvantage: the toggle mechanism takes relatively much time and labor to maintain, and isn't convenient to use; because metal bits and tiny unwanted things will come into existence in the lubricating oil after the toggle mechanism has been used for a certain length of time, the pivotal rod has to be separated from the toggles for oil change regularly otherwise the toggle mechanism won't move smoothly.

Images