Automatic hose shoulder injection machine and plastic spraying mechanism thereof

Abstract

The invention provides an automatic hose shoulder injection machine and a plastic spraying mechanism thereof. The plastic spraying mechanism comprises a valve seat, a valve element piston and a valveelement piston rod. During material injection, the valve element piston rod moves upwards to be located in a first position state, molten plastic enters a material storage bin from a feeding opening through a first feeding hole, a second feeding hole and a third feeding hole; pressure is formed in the material storage bin, so that the valve element piston is pushed upwards until reaching the uppermost stroke, so that the feeding of the molten plastic is stopped; the valve element piston rod works and moves downwards to abut against the valve element piston, so as to close a feeding channel inthe valve element piston; and the valve element piston rod drives the valve element piston to continuously move downwards, at this moment, a discharging opening is opened, the molten plastic is extruded out of the discharging opening through the valve element piston, and the plastic is sprayed. A plastic spraying amount can be controlled by controlling the stroke of the valve element piston rod; plastic spraying metering can be adjusted by adjusting the stroke of the valve element piston rod; and adjustment is convenient and easy to control. The plastic spraying mechanism can meet the high-precision plastic spraying metering requirement of a multi-head hose shoulder injection machine.

Description

technical field [0001] The invention relates to the technical field of a hose shoulder injection machine, in particular to an automatic hose shoulder injection machine and a molding mechanism thereof. Background technique [0002] In the existing plastic injection device of the shoulder injection machine, the adjustment of the metering is controlled by the size of the flow rate and the opening time of the valve. This method has high requirements for the stability of the flow rate of molten plastic, high requirements for the time control of valve opening and closing, and high requirements for the degree of cooperation between the two. This method of plastic injection is unstable in measurement, which affects the shoulder of the hose. beautiful. In the existing double-head hose shoulder injection machine or multi-head hose shoulder injection machine, one spouting screw is used to distribute multiple molds. Since the measurement is affected by the flow rate of molten plastic, ...

AI Technical Summary

Problems solved by technology

This method has high requirements for the stability of the flow rate of molten plastic, high requirements for the time control of valve opening and closing, and high requirements for the degree of cooperation between the two. This method of plastic injection is unstable in measurement, which affects the shoulder of the hose. beautiful

In the existing double-head hose shoulder injection machine or multi-head hose shoulder injection machine, one spouting screw is used to distribute multiple molds. Since the measurement is affected by the flow rate of molten plastic, the flow rate during distribution cannot be completely uniform, so It affects the size of the metering, and is not suitable for the plastic injection requirements of the multi-head hose shoulder injection machine

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