Spray head applicable to continuous fiber reinforced composite material additive manufacturing

Abstract

The invention belongs to the field of additive manufacturing, and relates to a spray head applicable to continuous fiber reinforced composite material additive manufacturing, which comprises a spray head body, an inner cavity, heat conduction blocks, a cover cap, a fiber spray head, a fiber throat pipe, a polytetrafluoroethylene pipe I, a resin spray head, a resin throat pipe, a polytetrafluoroethylene pipe II, heating rods and temperature sensors. A bonding effect of rein and fiber can be improved, and the spray heads can be prevented from being blocked and can be cleaned conveniently. The spray heads are detachably connected to the lower end of the inner cavity; the heat conduction blocks are sleeved on the spray heads; the heating rods and the temperature sensors are nested on the heat conduction blocks; the cover cap is detachably connected to the upper end of the inner cavity; the fiber throat pipe and the resin throat pipe are detachably connected onto through holes of the cover cap; the resin spray head is also detachably connected onto the through hole connected with the resin throat pipe; the polytetrafluoroethylene pipe I is sleeved in the fiber throat pipe; the fiber spray head is detachably connected to the lower end of the fiber throat pipe; the polytetrafluoroethylene pipe II is sleeved in the resin throat pipe; and the inner cavity and the cover cap are connected to form a cavity.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and more specifically relates to a nozzle suitable for additive manufacturing of continuous fiber reinforced composite materials. Background technique [0002] Additive manufacturing technology is an emerging technology that is rapidly developing in the field of manufacturing. It is called "manufacturing technology with important symbolic significance for the third industrial revolution", and major developed countries have listed it as a key technology for strategic development. At present, additive manufacturing technology relies on cutting-edge technologies in multiple disciplines, and has been applied in aerospace technology, automobile and home appliance manufacturing, biomedicine, food processing and other fields. Compared with traditional manufacturing technology, additive manufacturing 3D rapid prototyping manufacturing technology omits the processing and manufacturing of product mold...

AI Technical Summary

Problems solved by technology

[0004] However, the current continuous fiber reinforced composite material additive manufacturing technology research is less, still in the research and development stage, there are many problems

For example, the resin cannot fully enter the interior of the fiber ribbon, and the fiber filaments cannot be bonded together by the resin, thus forming a cavity inside the printed workpiece, which seriously reduces the mechanical properties of the workpiece

In addition, the additive manufacturing of continuous fiber-reinforced composites is prone to clogging, resulting in the inability of fibers to come out or resin overflowing from the inside of the nozzle

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