Single-cylinder injection parallel double-color injection table structure

Abstract

The invention provides a single-cylinder injection parallel double-color injection table structure which comprises a fixed die plate, a first injection table and / or a second injection table, wherein the first injection table and the second injection table each comprise an injection moving assembly, a glue melting assembly, a screw assembly, an injection table front plate, a middle plate plasticizing assembly, an injection table rear plate and an injection oil cylinder assembly which are arranged on a fixed seat; the screw assembly is located in the glue melting assembly, the glue melting assembly is used for melting glue, the screw assembly is used for feeding and injecting glue, and the injection moving assembly is installed between the fixed die plate and the injection table front plate; the middle plate plasticizing assembly is located between the injection table front plate and the injection table rear plate, the injection table front plate and the injection table rear plate are both installed on the fixed seat, one end of the injection oil cylinder assembly is fixed to the injection table rear plate, and the output end of the injection oil cylinder assembly is connected to the middle plate plasticizing assembly; and the injection oil cylinder assembly acts so that the middle plate plasticizing assembly can drive the screw assembly to do linear motion, a transmission mechanism is arranged in the middle plate plasticizing assembly, and the screw assembly can do rotary motion through the action of the transmission mechanism.

Description

technical field [0001] The invention relates to the technical field of injection molding equipment, in particular to a single-cylinder injection parallel double-color injection platform structure. Background technique [0002] At present, the existing parallel two-color injection units mainly adopt a single-cylinder injection structure, which has the characteristics of narrow shape, small volume, and convenient parallel placement. The single-cylinder injection structure is roughly divided into two types: the single-cylinder axial line injection platform with the piston rod rotating and the single-cylinder built-in line injection platform with the piston rod built in the transmission shaft and does not rotate. The following technical problems: ⑴Single-cylinder axial one-line injection platform, the long spline transmits the rotary motion of the plasticizing motor to the injection piston rod, and then to the plasticizing screw. The related seals perform both linear and rotary ...

AI Technical Summary

Problems solved by technology

The single-cylinder injection structure is roughly divided into two types: the single-cylinder axial line injection platform with the piston rod rotating and the single-cylinder built-in line injection platform with the piston rod built in the transmission shaft and does not rotate. The following technical problems: ⑴Single-cylinder axial one-line injection platform, the long spline transmits the rotary motion of the plasticizing motor to the injection piston rod, and then to the plasticizing screw. The related seals perform both linear and rotary motions, which is very Easy to wear, extremely short life, easy to leak oil, the iron powder worn when the long spline slides in a straight line directly enters the hydraulic oil system of the injection molding machine, damages hydraulic oil valves and other components, and accelerates oil deterioration

⑵Single-cylinder built-in one-line injection platform, relatively speaking, the impact of seal loss and long spline wear is slightly improved, but the injection piston rod needs to be designed as a hollow type to accommodate the drive shaft and its supporting bearings, which are affected by Limited to the characteristics of the structure itself, either the diameter of the transmission shaft and bearing is not large enough to transmit torque and withstand the injection force, or the diameter of the injection piston rod must be made large, which increases the difficulty of processing the parts

(3) The drive shaft support of the above two types of injection platforms is indirectly acting on the seals at both ends of the injection piston rod and the piston. The guide ring is not enough to provide a stable rigid support, which will cause the screw handle to sag and shake and break when it is rotated and plasticized. , at the same time, this shaking phenomenon aggravates the loss of seals

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