Low-temperature FDM (fused deposition modeling) 3D printing material and preparation and application thereof

A 3D printing, low-temperature technology, applied in the direction of additive processing, manufacturing auxiliary devices, processing data acquisition/processing, etc., can solve the problems of high requirements for 3D printing equipment, complex implementation methods, low melt strength, etc., and achieve selectivity Wide, simple preparation method, good printing performance

Inactive Publication Date: 2018-01-30
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a 3D printing material, pure PCL has problems such as slow solidification, low melt strength, and difficulty in molding. As a result, there is currently no PCL material that can be used for FDM 3D printing.
For example, the PCL / β-TCP composite material developed in Patent Publication No. CN106334217A "A 3D Printing PCL / β-TCP Composite Material and Its Preparation Method, Application, and Printing Method" has realized the 3D printing of PCL, but its use The traditional slurry printing method has high requirements on 3D printing equipment, and the price is quite expensive, and its implementation method is also relatively complicated, the steps are cumbersome, difficult to operate, and poor in promotion

Method used

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  • Low-temperature FDM (fused deposition modeling) 3D printing material and preparation and application thereof
  • Low-temperature FDM (fused deposition modeling) 3D printing material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 88g of PCL masterbatch and place it in a 250mL beaker, then weigh and add 0.1g graphite, 3g EBS, 3g SiO 2 and 4.9 g magnesium stearate. Use a mixer to mix it well.

[0029] Put the mixture in a twin-screw extruder, and fully blend the PCL and the filler by means of melt blending. Set the temperature of zone 1, zone 2, zone 3 and zone 4 of the twin-screw extruder to 50, 75, 100 and 75°C, respectively. Set the screw speed at 20 rpm. After the blending is completed, the prepared materials are pulverized and granulated.

[0030] The prepared pellets are melted and extruded by a single-screw extruder, and pulled by a tractor to form a wire with uniform size. Set the temperature of the first zone and the second zone of the single-screw extruder to 80°C and 85°C respectively, the screw speed to 30rpm, and the wire size to 1.70-1.75mm.

[0031] When printing with an FDM 3D printer, set the 3D printer parameters as follows: nozzle temperature 85°C, base plate temperat...

Embodiment 2

[0033] Weigh 89g of PCL masterbatch and place it in a 250mL beaker, then weigh and add 1.1g graphite, 3g EBS, 3g SiO 2 and 3.9 g magnesium stearate. Use a mixer to mix it well.

[0034] Put the mixture in a twin-screw extruder, and fully blend the PCL and the filler by means of melt blending. The temperatures of the first zone, the second zone, the third zone and the fourth zone of the twin-screw extruder were respectively set to 60, 75, 90 and 75°C. Set the screw speed at 20 rpm. After the blending is completed, the prepared materials are pulverized and granulated.

[0035] The prepared pellets are melted and extruded by a single-screw extruder, and pulled by a tractor to form a wire with uniform size. Set the temperature of the first zone and the second zone of the single-screw extruder to 80°C and 85°C respectively, the screw speed to 30rpm, and the wire size to 1.70-1.75mm.

[0036] When printing with an FDM 3D printer, set the 3D printer parameters as follows: nozzle...

Embodiment 3

[0038] Weigh 90g of PCL masterbatch and place it in a 250mL beaker, then weigh and add 2g of graphite, 3g of EBS, and 2g of SiO 2 and 3 g of magnesium stearate. Use a mixer to mix it well.

[0039] Put the mixture in a twin-screw extruder, and fully blend the PCL and the filler by means of melt blending. Set the temperature of zone 1, zone 2, zone 3 and zone 4 of the twin-screw extruder to 50, 70, 90 and 75°C, respectively. Set the screw speed at 15 rpm. After the blending is completed, the prepared materials are pulverized and granulated.

[0040] The prepared pellets are melted and extruded by a single-screw extruder, and pulled by a tractor to form a wire with uniform size. Set the temperature of the first zone and the second zone of the single-screw extruder to 80 and 85° C., the screw speed to 40 rpm, and the wire size to 1.70-1.75 mm.

[0041] When printing with an FDM 3D printer, set the 3D printer parameters as follows: nozzle temperature 85°C, base plate temperat...

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PUM

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Abstract

The invention belongs to the field of FDM ((fused deposition modeling) 3D printing and discloses a low-temperature FDM 3D printing material and preparation and application thereof. The material is prepared from PCL (polycaprolactone), graphite, EBS, SiO2 and magnesium stearate. A preparation method includes steps: subjecting PCL masterbatch to melt mixing with filler such as graphite, EBS, SiO2 and magnesium stearate according to a certain proportion through double screws, crushing, granulating, extruding through a single screw, and stretching to obtain wires uniform and appropriate in size. By adoption of the process, the problem of failure in 3D printing of PCL according to an FDM method is solved, and simplicity, feasibility, low preparation cost and high printing precision are realized. Due to high selectivity and low 3D printing equipment requirements, the low-temperature FDM 3D printing material can be applied to normal domestic FDM 3D printers and has important values and significances in the field of FDM 3D printing.

Description

technical field [0001] The invention belongs to the field of FDM 3D printing, and in particular relates to the preparation of a low-temperature FDM 3D printing material. Background technique [0002] Fused Deposition Modeling (Fused Deposition Modeling, FDM) rapid prototyping process is a molding method that melts various filaments (such as engineering plastics ABS, polycarbonate PC, etc.) The material is melted into a liquid state by high temperature, solidified after being extruded through the printing head, and finally arranged in a three-dimensional space to form a three-dimensional object. Fused deposition modeling is a kind of 3D printing technology, which plays a vital role in the field of 3D printing. This is due to its relatively simple molding method, high molding precision, good hardness of the printed model, strong promotion, does not rely on laser as the molding energy, and the cost of printing equipment is low, so it has become the most popular 3D printing tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K13/02C08K3/04C08K3/36C08K5/098C08K5/20B33Y70/00B29C47/00B29C47/92B29C64/393B33Y50/02B29C48/92
Inventor 杨济豪徐福建段顺
Owner BEIJING UNIV OF CHEM TECH
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