Quick forming screw extruding jet device for thermoplastic particle material

Abstract

The quick forming and screw extruding jet device for thermoplastic particle material belongs to the field of fast forming and smelting extrusion stacking technology in mechanical processing. The device includes push rod feeding mechanism, reducing worm gear transmission mechanism, micro extruding screw jet mechanism and temperature controlling heating mechanism. The push rod feeding mechanism consists of electromagnet, push rod and switching joint, and realizes the intermittent feeding of particle material via the reciprocation of the push rod notch between the material bin and material barrel. The present invention is a ideal smelting, extruding, stacking and forming jet device with effectively lowered cost, raised processing speed and less flow casting.

Description

technical field [0001] The invention relates to a rapid prototyping extrusion nozzle device, in particular to a rapid prototyping screw extruder nozzle device for thermoplastic granular materials, which belongs to the rapid prototyping melting extrusion stacking technology in the field of mechanical processing. Background technique [0002] Rapid prototyping technology is a new advanced manufacturing technology developed in the late 1980s, and it has many ways of process realization. In the rapid prototyping system based on melt extrusion accumulation forming, the nozzle is the key component to achieve accumulation forming. It cooperates with the motion system to realize the orderly transfer of materials driven by CAD information, and then builds up and bonds layers to form three-dimensional solid parts. . Therefore, the nozzle is the premise and core of melt extrusion accumulation forming. [0003] Among the current commercial rapid prototyping devices, the rapid prototyp...

AI Technical Summary

Problems solved by technology

The disadvantage is that this device uses filamentous materials, and the material cost is high; due to the limitation of the friction wheel conveying force and the anti-stabilization ability of the filament from the entrance of the liquefaction chamber to the wheel, the forming speed cannot be increased, and the extrusion volume per hour Only 12~17 grams; nozzle lagging and salivation cannot be overcome, and the forming quality of the prototype is affected

The disadvantage is that this nozzle device still uses filamentous materials, the material cost is high, and the breadth and depth of available materials are limited, so that the cost of prototype production cannot be reduced; at the same time, the power drive device on the nozzle is liquefied by the traditional wire feeding One set of solid wire push nozzle device is increased to two sets now, namely: screw drive motor and friction wheel drive motor

This increases the weight of the nozzle and the complexity of coupling control, and the manufacturing cost of the nozzle is high

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