Miniature precision injection machine

Abstract

The invention discloses a miniature precision injection machine. The miniature precision injection machine comprises a mold opening / closing mechanism, a melting rubber-injection mechanism and a frame. A stirring and shearing screw of the melting rubber-injection mechanism is arranged in a heating component. The stirring and shearing screw and an inner wall of the heating component form a rubber-smelting chamber. A hole with an open end is arranged in the center of the stirring and shearing screw. An injection rod extends into the hole from the open end so that an accommodation chamber is formed. The other end of the stirring and shearing screw is provided with a rubber-feeding hole. A rubber-discharge hole is arranged at a stirring and shearing screw part located at a rubber-feeding hole side far away from the open end. The rubber-feeding hole and the rubber-discharge hole rotatingly cooperate with a one-way valve core arranged at a heating component end close to the mold opening / closing mechanism so that alternative working of the rubber-feeding hole and the rubber-discharge hole is realized. The miniature precision injection machine has the advantages that the whole machine body is short; a floor space is small; a structure is compact; maintenance is easy; automatic rubber-feeding and discharge are realized; the motions of all parts can be controlled fully automatically and accurately by PLC; and an injection rod having a large ratio of the length to the cross section diameter is adopted so that the adopted injection rod has a longer stroke and the precision of an injection amount can be improved to 0.01mg.

Description

technical field [0001] The invention relates to a micro precision injection molding machine comprising a mold opening and closing mechanism, a melt injection mechanism and a frame. The mold opening and closing mechanism and the melt injection mechanism are arranged on the frame. Background technique [0002] A traditional injection molding machine generally includes a mold opening and closing mechanism, a melt injection molding mechanism and a frame. The melted rubber cylinder, as disclosed in the Chinese patent document CN201272008, is the same as the energy-saving structure of a melted rubber cylinder of an injection molding machine. There are multiple heating rings to heat the melt cylinder in sections. Therefore, the melt injection mechanism of this injection molding machine is generally long, which makes the overall length of the entire injection molding machine very long and occupies a large area. In the current situation where every inch of land is very expensive, oc...

AI Technical Summary

Problems solved by technology

This structure can greatly shorten the length of the melt injection molding mechanism and reduce the footprint of the injection molding machine. However, this structure of arranging the melting device and the injection device in parallel up and down also has a complex structure and space occupation. Large, and after each glue feeding is completed, the ball valve needs to be closed before glue injection to prevent the melted glue from returning to the glue melting device due to excessive pressure during glue injection. This operation is very precise or careful, a little Closing early or late will affect the quality of the product

It is specifically said that early closing will cause insufficient glue intake, resulting in the product not being completely injected; delayed closing will cause the melted glue to return to the melting device, and then return from the feeding port. If you are not careful, this The returned high-temperature liquid will burn people

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