Anti-blocking device for injection molding machine nozzle and mould feed points

Abstract

The invention discloses an anti-blocking device for an injection molding machine nozzle and mould feed points. A filtering column is mounted at the rear end of a central hole of the injection molding machine nozzle or mounted on a portion, located in the rear of the injection molding machine nozzle, in an injection molding machine material tube, and is provided with feeding grooves, discharging grooves and filtering grooves, raw materials enter the filtering column from each feeding grooves of the filtering column and enter the discharging grooves after being filtered via the filtering grooves, and foreign materials in the raw materials are intercepted by the filtering grooves while the raw materials enter the injection molding machine nozzle and a mould from the discharging groove, therefore, halt and maintenance caused by blocking of the injection molding machine nozzle and the mould feed points are avoided. Feeding grooves and discharging grooves in large size can be cut on the filtering column, and a plurality of filtering grooves can be cut on shared groove walls among the feeding grooves and the discharging grooves, so that processing is facilitated, flow areas of the raw materials is increased greatly, and the anti-blocking device plays a role in intercepting and has small influences on injection flow and speed of the nozzle.

Description

technical field [0001] The invention relates to an improved structure of a nozzle of an injection molding machine, in particular to a device capable of preventing the nozzle and the entry point of a mold from being clogged. Background technique [0002] The working principle of the hot runner injection mold in the prior art is as follows: the molten plastic raw material is added into the material tube of the injection molding machine from the hopper of the injection molding machine, and the molten plastic raw material is pushed into the heat flow of the mold under the push action of the screw or plunger of the injection molding machine. into the closed mold cavity in the channel system. [0003] When the plastic raw material contains foreign matter (such as metal or other plastic-insoluble particles), the nozzle of the injection molding machine and the entry point of the mold are easily blocked, and production cannot continue at this time, and it must be shut down and repair...

AI Technical Summary

Problems solved by technology

[0003] When the plastic raw material contains foreign matter (such as metal or other plastic-insoluble particles), the nozzle of the injection molding machine and the entry point of the mold are easily blocked, and production cannot continue at this time, and it must be shut down and repaired, which affects production efficiency

In view of this, there are operators who install filter screens at the injection nozzles of injection molding machines, such as Chinese patent: 201020569131.9 discloses a kind of injection machine nozzles with filtering function, which is to install a filter screen at the rear end of the central hole of the injection molding machine nozzles To intercept foreign matters in the molten plastic raw material, the filter is a cylinder with a height of 15mm and a diameter of 20mm and has multiple perforations along the axis of the cylinder, but this filter similar to a honeycomb has the following defects : A, because the size of the foreign matter in the plastic raw material is very small, the perforation must be very small in size, and with the processing level of the prior art, it is difficult to process many small-sized perforations on a cylinder with a diameter of 2 cm, and it is not easy to realize , resulting in lower yield and higher cost of producing the filter screen; B. Since the molten plastic raw material can only flow through the perforations, the number of axial perforations that can be processed on a cylinder with a diameter of 2 cm Very limited, so the filter has a considerable impact on the injection flow and velocity of the nozzle

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