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Method for solving spray head blocking based on FDM technology

A solution, nozzle technology, applied in the direction of additive processing, etc., can solve problems such as nozzle clogging, achieve the effect of solving clogging, expanding the application field, and being easy to operate

Inactive Publication Date: 2017-05-10
SHANDONG NON METALLIC MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: when preparing the printing material, add a material component with shear thinning properties compatible with the printing material, so that when 3D printing is performed, the printing material is subjected to shear thinning, thereby solving the problem of nozzle clogging and achieving the purpose of the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Select PLA material as printing material.

[0014] Preparation of PLA materials for printing: set the model as QM-15 ball mill with a speed of 300r / min and a working time of 60min. Weigh 90 parts by weight of PLA, 1 part by weight of dispersant Soplus D540, 4 parts by weight of plasticizer PLACIZER, 5 parts by weight of organic bentonite and 5% absolute ethanol with the total weight of the above raw materials added to the ball mill, start Ball mill, which mixes the mixture inside. After the work of the ball mill is completed, the mixture is taken out and granulated by a twin-screw extruder model AK53; the granules are placed in an oven and dried at 120° C. for 24 hours. After drying, it was processed into filaments with a diameter of 1.75mm using a desktop 3D printing consumable extruder model named Wellzoom B.

[0015] Place the prepared PLA filament material in the place where the 3D printer holds the material.

[0016] Start the 3D printer and preheat the print he...

Embodiment 2

[0021] Select PLA material as printing material.

[0022] Preparation of PLA materials for printing with high fiber content:

[0023] Put 5g of coupling agent KH560 into a beaker filled with 1000ml of deionized water and mix, then weigh 50g of glass fiber powder with a length of 120μm and add it to the beaker. After mixing evenly, divide the mixture into five beakers and place In the KQ500 ultrasonic cleaning tank, at room temperature, after ultrasonication at a frequency of 45kHZ for 30 minutes, the beaker was taken out and filtered to remove the solvent, and then dried to obtain a fiber reinforced material with a modified surface. Set the model as QM-15 ball mill with a speed of 400r / min and a working time of 90min. Weigh 11 parts by weight of the fiber reinforced material prepared above, 79.5 parts by weight of PLA, 6 parts by weight of fumed silica, 3.5 parts by weight of plasticizer PLACIZER and 5% of the total weight of the above-mentioned materials Add to the ball mill...

Embodiment 3

[0030] Select PLA material as printing material.

[0031] Preparation of PLA materials for printing with high fiber content:

[0032] Add 1.5 grams of coupling agent KH570 to a beaker containing 1000ml of deionized water, then weigh 30 grams of carbon fiber powder with a length of 300 μm and add it to the beaker. After mixing evenly, divide the mixture into five beakers and place In the KQ500 ultrasonic cleaning tank, at room temperature, after ultrasonication at a frequency of 45kHZ for 30 minutes, the beaker was taken out and filtered to remove the solvent, and then dried to obtain a fiber reinforced material with a modified surface. Set the model as QM-15 ball mill with a speed of 350r / min and a working time of 100min. Weigh 21.5 parts by weight of the fiber reinforced material prepared above and 70 parts by weight of PLA, 5 parts by weight of polyethylene wax, 1 part by weight of plasticizer PLACIZER, 4 parts by weight of toughening agent A-6641 and the total weight of th...

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Abstract

The invention discloses a method for solving spray head blocking based on an FDM technology. By adding a material component with a shear thinning characteristic and compatible with a base material during preparation of a printing material, when the equipment spray head bears a shear acting force due to the conical structure or the existence of impurity particles in a 3D printing process, the viscosity of the printing material is reduced, the fluidity is improved, and the phenomenon of printing spray head blocking is effectively solved; and after being extruded out of the spray head, the printing material does not bear the shear action, the viscosity quickly recovers to an initial state, and thus the surface quality of the printed product is not influenced in a solidification process. By adopting the method disclosed by the invention, a high-content reinforcing fiber material also can be added into the printing material, the strength of the printed product is improved, and the application field of the printed product is expanded. Moreover, the method disclosed by the invention also has the advantages of simple production technology, easiness in operation, convenience for industrial production and the like.

Description

technical field [0001] The invention belongs to the field of fiber-reinforced polymer composite materials, is suitable for 3D printing, and in particular relates to a solution to clogging of 3D printing nozzles. Background technique [0002] FDM, fused deposition printing technology, is the most widely used 3D printing technology on the market. The process is to melt the thermoplastic material by heating it at a temperature slightly higher than the melting point of the printing material, extrude it from the nozzle, and print the finished product layer by layer under computer control. [0003] At present, when using the FDM process to print products, the nozzles of the printing equipment are often clogged, which is caused by the high viscosity of the printing materials used and poor fluidity, or the presence of impurity particles in the printing materials. Moreover, the current 3D printing products are not strong enough to be widely used. For this reason, Chinese patent CN 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K3/34C08K9/06C08K7/14C08K3/36C08K7/06C08L23/06C08L55/02C08K7/10B33Y70/00
CPCC08L67/04B33Y70/00C08K3/346C08K3/36C08K7/10C08K7/14C08K9/06C08K2201/004C08L55/02
Inventor 陈以蔚徐井利秦贞明李树虎王丹勇魏化震
Owner SHANDONG NON METALLIC MATERIAL RES INST
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