Dependence of stacking direction on mechanical properties of gels and plastics formed by 3D printing

Ota, Takafumi; Okada, Koji; Saito, Azusa; Yoshida, Kazunari; Murasawa, Go; Kawakami, Masaru; Furukawa, Hidemitsu

doi:10.1299/transjsme.16-00567

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…For samples (b), (c), and (d) additional tests were performed in a direction parallel to the stacking direction (direction shown in Figure b). Since the stacked directional dependence of the strength of the printed gel is low, (a) and (e) were not tested by changing direction. The tests were performed five times on each sample type.…”

Section: Methodsmentioning

confidence: 99%

3D Printing of Tough Gels Having Tunable Elastic Modulus from the Same Pre‐Gel Solution

Ota

Saito

Tase

et al. 2019

Macro Chemistry & Physics

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A gel forming method with sections with different elastic modulus is developed. Gels with hardness distribution are formed from one base gel material by adjusting the crosslinking density of the polymer network using a 3D gel printer. It is confirmed that hardness is arranged as designed by using mixing rules of composite materials. Furthermore, as a prototype of a practical gel application, a gel finger model having a soft‐fleshy part and a hard‐bony part is printed. 3D printing of an organ model that reproduces a realistic feel that takes not only the shape of the organ but also the distribution of hardness into consideration may become possible.

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Section: Methodsmentioning

confidence: 99%

3D Printing of Tough Gels Having Tunable Elastic Modulus from the Same Pre‐Gel Solution

Ota

Saito

Tase

et al. 2019

Macro Chemistry & Physics

Self Cite

View full text Add to dashboard Cite

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Influence of 3D-printing conditions on physical properties of hydrogel objects

Ota

Yoshida

Tase

et al. 2018

Mechanical Engineering Journal

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In this paper, we present the relationship between printing parameters of a 3D gel printer "Soft and Wet Intelligent Matter-Easy Realizer (SWIM-ER)" and mechanical properties of the fabricated gel objects by SWIM-ER. The printer is able to fabricate hydrogel objects by scanning of ultra-violet (UV) light irradiation (photopolymerization). Various hydrogels objects were printed with different scanning velocity of UV light. We measured the water content and mesh sizes of gel objects utilizing Scanning Microscopic Light Scattering (SMILS). Furthermore, we also printed the gel objects with multiple scan rates with constant UV light irradiation energy, and measured sizes of gel objects, and performed the compression test. It was observed that the physical properties of printed hydrogel objects are strongly related with 3D printing parameters (scan velocity and number of scans-scan rate) due to difference in crosslinking density of polymer network.

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Development of Path Generation Method for Five-Axis 3D Printer

Nishikawa¹,

Morimoto²,

Hayashi³

2019

IJAT

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3D printers that use the fused deposition modeling (FDM) method are generally based on a three-linear-axis mechanism. However, because the posture of the workpiece is limited, the shape of the model that can be generated by this type of 3D printer is restricted. The 3D printer makes 3D models by stacking up materials on a plane. Because of this principle, a base to support the laminated material is necessary, and it is impossible to develop a model shape with an overhang without support parts. Although the problem is solved by making a foundation using a support material, it takes time to shape and remove the material. Therefore, this conventional method is time consuming. The purpose of this research is to laminate and make shapes that are difficult to laminate with a three-axis 3D printer without using support material. Therefore, a new five-axis 3D printer was developed with the FDM method, and its control program was designed. In addition, hardware consisting of the mechanical structure and the servo control system was developed, and the laminating path, which can exert the effect of the five-axis mechanism, was calculated. The posture of the workpiece can be controlled by mounting the B-axis, which tilts the lamination table, and the C-axis, which rotates the lamination table added on the three-axis configuration 3D printer. Furthermore, a five-axis synchronization control program was developed to control the motion of the five-axis synchronous motion. Furthermore, to correct the nozzle position due to the posture change of the workpiece, a mathematical model of shape creation theory was applied to derive the offset command value. As a result of the laminating experiments of the overhang shape model, the five-axis mechanism and laminating path were sufficiently effective, and the five-axis synchronous control of the 3D printer demonstrated the creation of the overhang shape. However, in experiments using a conventional three-axis mechanism 3D printer with the same lamination path, resins did not adhere and dripped, making shaping impossible. Because of these results, the machining time of the five-axis controlled 3D printers was shorter than that of conventional three-axis-controlled 3D printers. Here, the basic configurations and control system are reported.

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Dependence of stacking direction on mechanical properties of gels and plastics formed by 3D printing

Cited by 4 publications

References 10 publications

3D Printing of Tough Gels Having Tunable Elastic Modulus from the Same Pre‐Gel Solution

3D Printing of Tough Gels Having Tunable Elastic Modulus from the Same Pre‐Gel Solution

Influence of 3D-printing conditions on physical properties of hydrogel objects

Development of Path Generation Method for Five-Axis 3D Printer

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