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Control method for 3D printing wire forming quality

A 3D printing and control method technology, applied in the field of 3D printing wire forming quality control, can solve the problems of poor material quality, low extrusion temperature, poor extrusion stability, etc., to reduce the high cost of use and improve the extrusion efficiency. , The effect of high extrusion stability

Inactive Publication Date: 2019-04-12
SHAANXI HENGTONG INTELLIGENT MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the traditional wire extrusion has a single extrusion raw material (unable to mix materials), low extrusion temperature (low extrusion temperature, insufficient extrusion capacity for high melting point materials), poor extrusion stability, and poor extrusion quality and other shortcomings
PEEK and PEI are materials with a high melting point. Traditional equipment can only be prepared by injection molding, molding, blow molding and other processes. This preparation process is complicated and the preparation cycle is long, and the quality of the prepared materials is poor. More importantly, the application range is narrow. And at the same time, it cannot take into account the preparation of various high melting point materials, and the follow-up processing cost and complexity are high, which limits the application and promotion of materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, a kind of control method of 3D printing wire material forming quality, comprises the following steps:

[0022] 1) Put the high-melting point extrusion material PEEK pellets in the material tray, then put the material tray into the drying oven to heat and dry, the drying temperature is 150 ° C, and the drying time is 4 hours to remove the moisture existing in the PEEK pellets;

[0023] 2) Place the dried PEEK pellets in a vacuum box to prevent secondary entry of moisture;

[0024] 3) Extrude the wire with a parallel twin-screw extruder:

[0025] 3.1) Add the PEEK pellets to the feeding container of the parallel twin-screw extruder;

[0026] 3.2) Adjust the extrusion process parameters. The extrusion process parameters include: use 7-stage extrusion zone temperature to be set as zone 1: 350°C, zone 2: 345°C, zone 3: 345°C, zone 4: 345°C, zone 5 Zone: 345°C, zone six: 342°C, die extrusion zone: 343°C; feeding speed 4.0r / min, screw extrusion speed 19r / min, a...

Embodiment 2

[0031] Embodiment 2, a method for controlling the molding quality of 3D printing filaments, comprising the following steps:

[0032] 1) Put the high-melting point extrusion material PEI pellets in a tray, then put the tray into a drying oven to heat and dry, the drying temperature is 150°C, and the drying time is 6h to remove the moisture present in the PEI pellets;

[0033] 2) Place the dried PEI pellets in a vacuum box to prevent secondary entry of moisture;

[0034] 3) Extrude the wire with a parallel twin-screw extruder:

[0035] 3.1) Add PEI pellets to the parallel twin-screw extruder feeding container;

[0036] 3.2) Adjust the extrusion process parameters. The extrusion process parameters include: use 7-stage extrusion zone temperature to set respectively as zone 1: 341°C, zone 2: 336°C, zone 3: 330°C, zone 4: 330°C, zone 5 Zone: 322°C, zone six: 336°C, die extrusion zone: 332°C, feeding speed 3.4r / min, screw extrusion speed 20r / min, air cooling flow rate 3L / min, tract...

Embodiment 3

[0040] Embodiment 3, a kind of control method of 3D printing wire material forming quality, comprises the following steps:

[0041] 1) Put the high-melting point extrusion material carbon fiber + PEEK material into the tray with a mass fraction ratio of 1:20, then put the tray into a drying oven to heat and dry, the drying temperature is 150°C, and the drying time is 5h, remove the carbon fiber + PEEK moisture retained in the material,

[0042] 2) Place the dried carbon fiber + PEEK material in a vacuum box to prevent secondary entry of moisture;

[0043] 3) Extrude the wire with a parallel twin-screw extruder:

[0044] 3.1) Add the dried carbon fiber + PEEK material to the V-type mixer for full mixing, set the speed of the V-type mixer to 50r / min, mix for 6 hours, and mix the dried carbon fiber + PEEK material Add to feeding container;

[0045] 3.2) Adjust the extrusion process parameters. The extrusion process parameters include: use the 7-stage extrusion zone temperature...

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Abstract

A control method for the 3D printing wire forming quality comprises the steps that extrusion materials with high melting point are put into a tray, then the tray is put into a drying box to be heatedand dried, and the dried extrusion materials with high melting point are put into a vacuum box; a wire is extruded out through a parallel double- screw extrusion machine; extrusion process parametersare adjusted, and the stable, controlled and continuous wire is extruded out; and finally, the extruded wire is printed through 3D printing equipment, a printing process is adjusted, and a needed model is printed and finally applied. The control method achieves qualified 3D printing of the materials with high melting point, greatly improves the preparation efficiency and reduces the preparation cost.

Description

technical field [0001] The invention relates to the technical field of FDM fused deposition 3D printing, in particular to a method for controlling the molding quality of 3D printing filaments. Background technique [0002] Wire extrusion is an important part of 3D printing. With the wide application of polymer materials, polyether ether ketone (polyether-ether-ketone, peek), polyimide (polyimide, PI) compared with traditional ABS , PLA and other 3D printing materials have excellent mechanical properties, heat resistance, fatigue resistance, creep resistance, radiation resistance and weather resistance, and have been used as a lightweight high-performance material with great potential to replace Metal materials are used in various fields. [0003] However, the traditional wire extrusion has a single extrusion raw material (unable to mix materials), low extrusion temperature (low extrusion temperature, insufficient extrusion capacity for high melting point materials), poor ex...

Claims

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Application Information

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IPC IPC(8): B29B13/06B29C48/05B29C48/40B29C48/92
CPCB29B13/06
Inventor 康小青王阳涛石长全郝睿婷
Owner SHAANXI HENGTONG INTELLIGENT MACHINE
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