Injection molding machine and ejection mechanism thereof

Abstract

The invention provides an ejection mechanism of an injection molding machine. The ejection mechanism comprises an injection base, a ball screw pair and a pipe-shaped pressure sensor, wherein a pipe hole of the pipe-shaped pressure sensor is rotationally matched with a screw of the ball screw pair. One end of the pipe-shaped pressure sensor is fixedly connected with the injection base, and the other end of the pipe-shaped pressure sensor is fixedly connected with a nut of the ball screw pair. The pipe hole of the pipe-shaped pressure sensor is used for containing the screw of the ball screw pair, the thickness of the injection base does not need to be increased for supplying the screw containing space, and therefore the axial thickness of the injection base is reduced, the size and the weight of the injection base are reduced, the occupied space of the injection molding machine is reduced, and the weight of the injection molding machine is reduced. The pipe-shaped pressure sensor is arranged between the injection base and the ball screw pair, temperature transmission when a threaded rod and a material barrel are at high temperature can be avoided, and stability of the temperature of the pipe-shaped pressure sensor is guaranteed. Interference of the rotation torque strength during material storage can be removed, and high-precision, high-stability and high-repetition pressure measurement and control of the pipe-shaped pressure sensor are achieved. The invention further provides the injection molding machine.

Description

technical field [0001] The present invention relates to the technical field of injection molding, and more specifically, relates to an injection mechanism of an injection molding machine, and also relates to an injection molding machine with the above-mentioned injection mechanism of the injection molding machine. Background technique [0002] Injection molding machine, also known as injection molding machine or injection machine. It is the main molding equipment for making thermoplastics or thermosetting plastics into various shapes of plastic products with plastic molding molds. In the plastic injection molding process, the control of injection pressure is the key to improving product quality, such as the storage back pressure, which is actually one of the important parameters in the injection molding process parameters to control the quality of molten material and product quality. The existence of back pressure helps to compact the material in the screw groove, remove th...

AI Technical Summary

Problems solved by technology

[0005] As a result, the overall axial thickness of the injection seat is relatively large, which increases the size and weight of the injection seat, resulting in the entire injection molding machine being cumbersome, less flexible, occupying a larger space, and at the same time higher cost

[0006] Furthermore, when the disc-type pressure sensor 02 is installed between the screw rod 07 and the injection seat, the temperature of the screw rod 07 will be transmitted to the disc-type pressure sensor 02 during the injection process of the injection molding machine, causing the disc-type pressure sensor 02 to The temperature rise will increase the measurement error; in addition, during the storage process, due to the rotation of the middle screw 07, the shell of the disc pressure sensor 02 will be interfered by the rotation torque and the back pressure thrust of the storage material, resulting in an error in the measurement value and affecting the Pressure measurement accuracy and control accuracy

[0007] In addition, the above-mentioned disk-type pressure sensor has a large cross-section, which also leads to a large overall load of the injection molding machine, is relatively heavy, and takes up a large space

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