Machine barrel liquid additive agent spray gun device

Abstract

The invention relates to a machine barrel liquid additive spray gun device. A needle valve of a piston is arranged in a piston body; the end part of the piston body is provided with an adjusting bolt; a spring is arranged in the piston body; one end of the spring is connected with the adjusting bolt; the other end is connected with the needle valve of the piston; a connection body is arranged on the piston body vertical to the needle valve of the piston; the connection body is communicated with an additive hydraulic pump. The invention adopts the structure of needle valve type of the piston and skillfully applies the pressure difference between the pressure of an inner cavity of the machine barrel and an outside liquid pump to add the liquid additive into the machine barrel; when the additive is needed not to be added, the needle valve of the piston can automatically seal an inlet so as to prevent a melting body from leaking out; when the adding amount of the additive is changed and the pressure of the melting body in the machine barrel is enlarged, the spray gun device can make response adjustment to lead the inlet of the additive to be capable of working normally. The traditional plastic processing technique is changed significantly; the application range of the additive is expanded and the application effects are very remarkable.

Description

1. Technical field [0001] The invention relates to a barrel liquid additive spray gun device of a twin-screw plastic extruder. 2. Background technology [0002] Usually, the barrel of a twin-screw plastic extruder is an integral high-pressure container, and the plastic melt is plasticized and extruded in the barrel. The additives are mixed with the main material before feeding, and then extruded and plasticized. This method restricts many plastic processes. Due to the inherent characteristics of many plastic additives, if some additives are volatile, polluting, flammable, explosive, etc., they cannot be added when mixing materials in advance. When the main materials are mixed, there will be decomposition phenomenon, which will affect the production process, but it is difficult to add additives directly into the barrel in actual production. 3. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned disadvantages and provid...

AI Technical Summary

Problems solved by technology

[0002] Usually, the barrel of a twin-screw plastic extruder is an integral high-pressure container, and the plastic melt is plasticized and extruded in the barrel. The additives are mixed with the main material before feeding, and then extruded and plasticized. This method restricts many plastic processes. Due to the inherent characteristics of many plastic additives, if some additives are volatile, polluting, flammable, explosive, etc., they cannot be added when mixing materials in advance. When the main materials are mixed, there will be decomposition phenomenon, which will affect the production process, but it is difficult to add additives directly into the barrel in actual production

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