Anti-leakage 3D printing extrusion head and using method thereof

Abstract

The invention discloses an anti-leakage 3D printing extrusion head and a using method thereof. The anti-leakage 3D printing extrusion head comprises an automatic reset type anti-leakage internal plugging mechanism, a pressure induction type discharging control mechanism, a self-adaptive anti-leakage module clamping mounting device and a sealed extrusion head body. The invention belongs to the technical field of 3D printing extrusion heads, and particularly relates to a leakage-proof 3D printing extrusion head and a using method thereof. By means of the automatic reset type anti-leakage internal plugging mechanism and the pressure induction type discharging control mechanism, extrusion of an external feeding mechanism on a solid material wire serves as driving force, when the external feeding mechanism stops feeding, a self-adaptive lifting plugging column blocks a discharging opening in the bottom of a shell again under the elastic force effect of an automatic reset spring, and therefore the discharging opening in the bottom of the shell is blocked again. Leakage is prevented; under the condition that no independent driving device exists, the technical effect of passively controlling opening and closing of the discharging opening in the bottom of the shell is achieved through an ingenious mechanical structure, and the technical problem that a control valve cannot be placed in a high-temperature and narrow space is solved.

Description

technical field [0001] The invention belongs to the technical field of 3D printing extrusion heads, and specifically refers to a leak-proof 3D printing extrusion head and a method for using the same. Background technique [0002] It is a technology based on digital model files, using bondable materials such as powdered metal or plastic, to construct objects by layer-by-layer printing. At present, the most common printing method is to melt the rolled solid consumables Print layer by layer. [0003] The steps of this printing method are mainly to heat and melt the solid filament by electric heating, and then extrude it through the extrusion head. However, since the feeding mechanism is far away from the extrusion head, even when not feeding, as long as the extrusion The filament in the head is heated to the melting temperature, and it will drip from the extrusion head, which is mainly reflected in the following stages: [0004] A: It happens during the preheating stage. Befo...

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Problems solved by technology

[0008] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a leak-proof 3D printing extrusion head and its use method. The conventional idea to prevent the leakage of consumables is to block the extrusion head, but due to the small size of the extrusion head And the working temperature is high, and the active control valve cannot be installed in it. Therefore, based on the self-service principle, the present invention creatively proposes an automatic reset type anti-leakage internal sealing mechanism and a pressure-sensitive blanking control mechanism. The extrusion of the solid wire is used as the driving force. When feeding, the frustum-shaped retaining ring is controlled to leave the cone at the bottom of the shell, so that the consumables can flow out smoothly. When the external feeding mechanism stops feeding, the self-adaptive lifting blocking column automatically resets the spring Under the action of elastic force, the discharge port at the bottom of the shell is blocked again to prevent leakage; without any independent driving device, the technical effect of passively controlling the opening and closing of the discharge port at the bottom of the shell is realized through an ingenious mechanical structure, which overcomes the Solved the technical problem that the control valve cannot be placed in the high temperature and narrow space

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