Dynamic microchannel plastic extrusion-molding device and method

Abstract

The invention discloses a dynamic microchannel plastic extrusion-molding device and method. The device is mainly composed of a single-screw extruder, a dynamic extruder head, a fluid source, a water tank, a tractor, a coiling device, a data acquisition and control system. At the neighborhood of an outlet of an extrusion port mold, when end positions of an injection needle head of an injector core are different, the inside diameters of the plastic extrusion-molding microchannels are different, and the inside diameters of the microchannels in the extruded plastic dynamically vary when a hollow injector core in a dynamic extruder head vibrates at high frequency and short range along the extrusion direction. The device disclosed by the invention is novel in structure, diverse in variation rule, simple in processing equipment, high in automation degree, and stable in extrusion and high in dimensional accuracy of molded products.

Description

technical field [0001] The invention relates to an extrusion molding technology of plastic products, in particular to a dynamic microchannel plastic extrusion molding device and method. Background technique [0002] Extrusion molding is mainly used for extrusion molding of plastic products with the same cross-section, such as fibers, films, pipes, rods, plates, and profiles, but plastic products with changing cross-sections cannot be formed. Extrusion molding is also used for the processing of plastic products containing small hollow channels such as medical microtubes and hollow fibers. The common method of plastic extrusion forming a small-diameter hollow channel is generally to install a hollow core body in the die of the extruder head, and the hollow core body passes through the injection fluid, which is generally atmospheric or compressed gas, such as the interior designed by Mackley of Cambridge University. A method for forming a microchannel film containing multiple ...

AI Technical Summary

Problems solved by technology

However, the inner diameter of these hollow channel forming methods is constant, and it is difficult to form a structure in which the diameter of the hollow channel changes dynamically

[0003] The plastic bellows forming method can realize the dynamic change of the hollow channel, but this type of method has the following disadvantages: (1) The inner diameter of the channel is generally large, and it is difficult to process to the micron scale; (2) The channel change is formed by a mechanical forming device , there are few types of inner diameter change rules; (3) The outer diameter also changes dynamically; (4) Only applicable to single-channel pipes

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