Improving the quality of biopolymer (poly lactic acid) with the addition of bentonite as filler

Evaluating the Hole Quality Produced by Vibratory Drilling: Additive Manufactured PLA+

10.21203/rs.3.rs-161608/v1 ◽

2021 ◽

Author(s):

Mohammad Baraheni ◽

Mohammad Reza Shabgard ◽

Saeid Amini

Keyword(s):

Lactic Acid ◽

Surface Quality ◽

Thrust Force ◽

Quality Parameters ◽

Poly Lactic Acid ◽

Hole Quality ◽

Chip Type ◽

Ultrasonic Drilling ◽

Important Study

Abstract Improving the surface quality of additive manufactured parts like poly lactic acid (+) is an important study that is currently being carried out by researchers. To reach the high quality, different conventional and non-conventional methods are applied. In this study, the capability of ultrasonic vibration in drilling of an additive manufactured poly lactic acid (+)was examined. The process was implemented in two methods: conventional and vibratory drilling. Then, thrust force and chip type were analyzed and the effect of them on surface roughness, delamination, circularity, and cylindricality have been investigated. As a result, it was indicated that lower thrust force and broken chips, which were generated in ultrasonic drilling, caused the surface quality parameters to be improved compared to the conventional method.

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Drilling of Additive Manufactured Poly Lactic Acid Modified byDrilling of Additive Manufactured Poly Lactic Acid Modified by Ultrasonic Vibration Ultrasonic Vibration

10.21203/rs.3.rs-805507/v1 ◽

2021 ◽

Author(s):

Mohammad Baraheni ◽

Mohammad Reza Shabgard ◽

Saeid Amini

Keyword(s):

Lactic Acid ◽

Ultrasonic Vibration ◽

Cutting Tool ◽

Poly Lactic Acid ◽

Drilling Process ◽

Manufacturing Method ◽

Ultrasonic Drilling ◽

Chip Adhesion ◽

The Stability

Abstract Complex geometries can be produced by using additively manufacturing method (AM). As usual, the AM parts have rough surfaces in which post processing operations are needed. One of the useful operations is ultrasonic drilling process. In this process, an additional movement is added to the cutting tool to improve the machinability factors. In this study, poly lactic acid(+) was selected as workpiece where the quality of the holes generated by ultrasonic drilling, were investigated. The examination parameters were delamination, circularity, and cylindricality. As a result, it was shown that UD process could properly improve the examination parameters. It was explained that harmonic movement of drill bit in UD improved the stability of the process by a decrease in cutting forces and chip adhesion. Moreover, a significant reduction was observed in delamination factor by using ultrasonic vibrations.

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Evaluating the deposition quality of parts produced by an open-source 3D printer

Rapid Prototyping Journal ◽

10.1108/rpj-05-2016-0078 ◽

2017 ◽

Vol 23 (4) ◽

pp. 796-803 ◽

Cited By ~ 6

Author(s):

Leonardo Santana ◽

Carlos Henrique Ahrens ◽

Aurélio da Costa Sabino Netto ◽

Cassiano Bonin

Keyword(s):

Lactic Acid ◽

Process Parameters ◽

Poly Lactic Acid ◽

Processing Conditions ◽

Mass Measurements ◽

Content Type ◽

Factors Affecting ◽

Flexural Tests ◽

Feedstock Material

Purpose The purpose of this study is to analyze the factors affecting the deposition of parts manufactured in poly(lactic acid) with variations in print speed and extrusion temperature. Specimens were analyzed through optical microscopy, mass measurements and flexural tests. The extruder-head evaluation consisted of monitoring the feedstock material displacement on entering the system during deposition under different processing conditions. Design/methodology/approach To analyze the factors affecting the deposition, parts were manufactured in poly(lactic acid) with variations in print speed and extrusion temperature. Specimens were analyzed through optical microscopy, mass measurements and flexural tests. The extruder-head evaluation consisted of monitoring the feedstock material displacement on entering the system during deposition under different processing conditions. Findings The results showed low repeatability in the manufacturing of parts, as significant variations in the evaluated responses were found for specimens built under the same process parameters. The main cause for this effect was deposition failure, owing to filament slippage in the extruder head hobbed pulley. Practical implications The results found should alert users to the fact that performance tests need to be carried out on every subcomponent of the equipment before conducting experiments on printing parameters. The components of the equipment can influence the final quality of the parts obtained as much as the building parameters and this influence can be significant enough to overlap with that of the process parameters. Originality/value The effect of slippage on the deposition quality was quantified and the command loss in the machine control board was identified.

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STRATEGI IMITASI DAN MANAJEMEN PENGETAHUAN DALAM PENGEMBANGAN INOVASI PLA (POLY LACTIC ACID) PADA AGROINDUSTRIKEMASAN BIODEGRADABEL DI INDONESIA

JURNAL TEKNIK INDUSTRI ◽

10.25105/jti.v3i2.1574 ◽

2013 ◽

Vol 3 (2) ◽

Author(s):

Fitry Filianty

Keyword(s):

Knowledge Management ◽

Lactic Acid ◽

Raw Materials ◽

Raw Material ◽

Poly Lactic Acid ◽

Product Imitation ◽

Imitation Strategy

Indonesia has the potential for development of PLA (Poly Lactic Acid) as biodegradable packaging agroindustry due to the availability of raw material, such as tubers as a source of starch and lignocellulose as a source of cellulose, but Indonesia has limitations in terms of its technology. This was due to the intensity and quality of the research that has not been adequate. For that condition, imitation strategies can be developed for PLA (Poly Lactic Acid) agroindustry in Indonesia and the level of product imitation strategies is knockoff or cloning. At that level, PLA agroindustry to be developed completely replicate existing products but have other brands. With this strategy, the PLA agroindustry is expected to produce a cheaper price product because of the availability of raw materials in Indonesia that easy to fine. Raw material for PLA that can be selected from cassava tubers beacause its easy in cultivation and cheaper among other types of bulbs. To improve competitiveness, the company who built the imitation strategy needs to be managed with the application of knowledge management in order to be able to last long existence.

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