Research of 3D Printing Modes of Feedstock for Metal Injection Molding

2020 ◽  
Vol 992 ◽  
pp. 461-466
Author(s):  
A.Yu. Korotchenko ◽  
D.E. Khilkov ◽  
M.V. Tverskoy ◽  
A.A. Khilkova
Keyword(s):  
3D Printing ◽  
Injection Molding ◽  
Metal Injection Molding ◽  
Small Scale ◽  
Print Quality ◽  
Scale Production ◽  
Fused Filament Fabrication ◽  
Factors Affecting ◽  
The Cost

In this work, to reduce the cost of production of parts using injection molding metal technology (MIM technology), it is proposed to use additive technologies (AT) for the manufacture of green parts. The use of AT allows us to abandon expensive molds and expand the field of use of the MIM of technology in single and small-scale production. For manufacture of green parts, the technology of manufacturing fused filament (Fused Filament Fabrication – FFF) is offered. The original composition of the metal powder mix (feedstock) and the filament manufacturing modes for 3D printing have been developed for the FFF technology. The cost of filament is much lower than its analogs. The factors affecting the print quality of green part are considered. All factors are divided into two groups depending on the possibility of their change during printing. The research of the influence of the coefficient filament supply on the geometry of green parts during 3D printing is presented.

scholarly journals Methods and Principles of Product Design for Small-Scale Production Based on 3D Printing

2019 ◽  
Vol 1 (1) ◽  
pp. 789-798
Author(s):  
Jure Salobir ◽  
Jože Duhovnik ◽  
Jože Tavčar
Keyword(s):  
3D Printing ◽  
Development Process ◽  
Product Development Process ◽  
Small Scale ◽  
Systematic Research ◽  
Scale Production ◽  
Design Time ◽  
The Cost ◽  
Assembly Operations ◽  
Insight Into

AbstractTechnology of 3D printing is opening the possibility for small-scale production in quantities between ten and several hundred pieces. The technology of adding material enables the production of complex and integrated functional concepts in a single-pass process, which consequently potentially reduces the need for assembly operations. Design approaches and manufacturing processing are not mastered well because of a constant stream of new materials and manufacturing options. Well-designed products need to consider attributes of 3D printing as early as the conceptual phase. The cost of the product can be reduced with a systematic research and considering principles for small-scale production. In a cheaper, alternative production process the quality range of products is often lower. It has to be compensated with appropriate construction solutions which are less tolerance-sensitive. Therefore, in order to support the designer, to reduce the costs and design time of the product, a computer program was created to provide the user with an insight into the appropriate 3D printing technology. For simplifying the use, the program is also integrated into the product development process.

3D Printed Injection Molds Using Various 3D Printing Technologies

2020 ◽  
Vol 1005 ◽  
pp. 150-156 ◽  
Author(s):  
John Ryan Cortez Dizon ◽  
Arnaldo D. Valino ◽  
Lucio R. Souza ◽  
Alejandro H. Espera ◽  
Qiyi Chen ◽  
...  
Keyword(s):  
3D Printing ◽  
Injection Molding ◽  
Polylactic Acid ◽  
Dimensional Accuracy ◽  
Damage Mechanism ◽  
Molding Machine ◽  
Fused Filament Fabrication ◽  
Commercial Software ◽  
3D Printed

This paper explores the possibility of using different 3d printing methods and materials in the production of polymer molds for injection molding applications. A mold producing a cube was designed using a commercial software. Following the standard 3d printing process, injection molds which could produce a cube were printed using different 3d printing materials and 3d printing technologies. The 3d printing technologies used were Stereolithography (SLA), Polyjet and Fused Filament Fabrication (FFF). A bench-top injection molding machine was used to inject polylactic acid (PLA) in these molds. The quality of the injected parts in terms of dimensional accuracy has been investigated. In some cases, the damage mechanism of the polymer molds has also been observed.

Process Monitoring of 3D Metal Printing in Industrial Scale

2018 ◽  
Author(s):  
Mohammadhossein Amini ◽  
Shing Chang
Keyword(s):  
3D Printing ◽  
Process Monitoring ◽  
Numerical Study ◽  
High Reliability ◽  
Factors Affecting ◽  
Main Metal ◽  
Metal Printing ◽  
Metal 3D Printing ◽  
Using Data

Metal 3D printing is one of the fastest growing additive manufacturing (AM) technologies in recent years. Despite the improvements and capabilities, reliable metal printing is still not well understood. One of the barriers of industrialization of metal AM is process monitoring and quality assurance of the printed product. These barriers are especially much highlighted in aerospace and medical device manufacturing industries where the high reliability and quality is needed. Selective Laser Melting (SLM) is one of the main metal 3D printing methods where it is known that more than 50 parameters are affecting the quality of the print. However, the current SLM printing process barely utilize a fraction of the collected data during production. Up to this point, no study to the best of our knowledge examines the correlation of factors affecting the quality of the print. After reviewing the current state of the art of process monitoring for metal AM involving SLM, we propose a method to control the process of the print in each layer and prevent the defects using data-driven techniques. A numerical study using simulated numbers is provided to demonstrate how the proposed method can be implemented.

scholarly journals FAKTOR KEPUASAN WISATAWAN PENGGUNA TRANSPORTASI LAUT DARI BALI KE GILI TRAWANGAN

Jurnal IPTA ◽  
2018 ◽  
Vol 6 (2) ◽  
pp. 124
Author(s):  
Syukriyan Abrar Syah ◽  
Ni Gusti Ayu Susrami Dewi ◽  
Putu Agus Wikanatha Sagita
Keyword(s):  
Quality Of Service ◽  
Dominant Factor ◽  
Sea Transport ◽  
Marine Transportation ◽  
Factors Affecting ◽  
Cost Factor ◽  
Level Of Satisfaction ◽  
The Cost ◽  
Selection Of

This research aims to analyze factors affecting the satisfaction of tourists in the use of marine transportation from Bali toward Gili Trawangan. The benefits of this research useful to the company in improving the services for tourists who will use the services of a crosswalk leading to Gili Trawangan.The respondents in this research totalled 190 respondents, the selection of the sample using the method of purposive sampling, the data in this study were analyzed using the analysis factors that help by statistikal program SPSS version 17.0 for windows. The results of this study are: 1) the satisfaction of tourists in the use of sea transport in general are at a level of satisfaction. 2) there are three factors that affect the satisfaction of tourists formed i.e. factors quality of maids, the cost factor & ease factors and product quality. Quality of service factor is the most dominant factor influencing the satisfaction of travellers with variable reliability as the dominant variables, and the variable availability schedule is a variable that must be improved.

Innovative Metal Injection Molding (MIM) Method for Producing CoCrMo Alloy Metallic Prosthesis for Orthopedic Applications

2014 ◽  
Vol 879 ◽  
pp. 102-106
Author(s):  
Noorsyakirah Abdullah ◽  
Mohd Afian Omar ◽  
Shamsul Baharin Jamaludin ◽  
Nurazilah Mohd Zainon ◽  
Norazlan Roslani ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Injection Molding ◽  
High Performance ◽  
Slip Casting ◽  
Plastic Injection Molding ◽  
Metal Injection Molding ◽  
Powder Injection ◽  
Powder Metallurgy Process ◽  
The Cost ◽  
Plastic Injection

Powder injection molding (PIM) is a powder metallurgy process currently used for the production of complicated and near net shape parts of high performance materials [. This technique basically combines the advantages of plastic injection molding and the versatility of the conventional powder metallurgy technique. The process overcomes the shape limitation of powder compaction, the cost of machining, the productivity limits of isostatic pressing and slip casting, and the defect and tolerance limitations of conventional casting [1, 2, . According to German and Bose [, the technology of metal injection molding (MIM) is more complicated than that of the plastic injection molding, which arises from the need to remove the binder and to densify and strengthen the part. The process composed of four sequential steps: mixing of the powder and organic binder, injection molding, debinding where all binders are removed and sintering [1, 2, 3, 4]. If it necessary, secondary operations such as heat treatments after sintering can be performed [1, 2, 3, 4, .

Characterization of Fabricated Feedstock Using Nano Powders and a Water-Soluble Binder in Micro Metal Injection Molding

2013 ◽  
Vol 25 ◽  
pp. 174-180
Author(s):  
Rajabi Javad ◽  
Norhamidi Muhamad ◽  
Abu Bakar Sulong ◽  
Aziz Hasyimah ◽  
Abdolali Fayyaz ◽  
...  
Keyword(s):  
Injection Molding ◽  
Water Soluble ◽  
Metal Injection Molding ◽  
Small Scale ◽  
Powder Size ◽  
Capillary Rheometry ◽  
Shear Rates ◽  
Different Temperatures ◽  
A Minor ◽  
Stainless Steel 316

Micro metal injection molding has become the promising method in powder metallurgy research in order to fabricate small-scale intricate parts in an influential process and competitive cost of mass production. Stainless steel 316 L powders with powder size of 150 nm and 5 μm were mixed with a binder with a water soluble component which consisted of a major fraction of water soluble Polyethylene Glycol (PEG), a minor fraction of polymethyl-methacrylate (PMMA) and some stearic acid has been used as a surfactant. This work aims to investigate the rheological properties of a feedstock which are efficiently characterised by capillary Rheometry to measure apparent viscosities at different temperatures and shear rates. Results obtained by the varying feedstock characteristics, when viscosity decreases by increasing of shear rate at certain temperature feedstock should have a pseudoplastic behaviour. Melt viscosity of the feedstock was decreased by adding nanoscale powders. The reduced (n) values at high temperature with addition of nanoparticles indicated a possible increase in the shear-thinning behavior.

Titanium Metal Injection Molding - A Commercial Overview

2016 ◽  
Vol 704 ◽  
pp. 107-112 ◽  
Author(s):  
Matthias Scharvogel
Keyword(s):  
Injection Molding ◽  
Production Method ◽  
The United States ◽  
Production Equipment ◽  
Metal Injection Molding ◽  
Product Portfolio ◽  
High Expectations ◽  
Research Activities ◽  
Sporting Goods ◽  
The Cost

Metal Injection Molding (MIM) of Titanium and its alloys has been the topic of many scientific research activities and presentations for many years. By now there are several companies that focus on applying the gained knowledge for producing Titanium MIM components in production quantities. This is only possible since Titanium powder in repeatable quality is available in production quantities and the specialized production equipment was developed over the recent years. Two ASTM standards for Titanium MIM implants have published and several Titanium MIM components have received approval around the globe, including approval by the Food and Drug Administration (FDA) for the United States. Based on this foundation, several large Medical Technology companies started developing next generation implants using MIM as the preferred production method in order to use the design advantages and / or reduce costs. The aerospace industry also started recognizing the advantages of Titanium MIM. There are several Titanium MIM parts that are already being used in commercial airplanes in production quantities. Additional applications in order to replace other materials, reduce costs or use the design advantages of MIM are currently being developed. The cost reduction related to Titanium MIM allows the usage of this great material in other industries like for sporting goods, outdoor equipment or luxury products. The Titanium MIM industry is slowly maturing and large companies started applying the great advantages into the product portfolio. It will be imperative that the relatively small Titanium MIM companies perform according to the high expectations of the large potential customers that would like to use the technology for future products.

Pad printing of polymeric silver ink conductors on thermoplastic foils

Circuit World ◽  
2016 ◽  
Vol 42 (4) ◽  
pp. 170-177 ◽  
Author(s):  
Teija Laine-Ma ◽  
Pekka Ruuskanen ◽  
Satu Pasanen ◽  
Mikko Karttunen
Keyword(s):  
Curing Temperature ◽  
Print Quality ◽  
Content Type ◽  
Factors Affecting ◽  
Silver Ink ◽  
Excellent Adhesion ◽  
Pet Film ◽  
Electrical Conductors ◽  
Printing Parameters

Purpose The aim of this study was to evaluate the feasibility of pad printing for producing electrical conductors and to define the factors affecting the print quality of polymeric silver ink conductors. Design/methodology/approach Polyethylene terephthalate (PET) film and polyphenylene oxide (PPO) compound film were used as substrate materials. Three different polymeric silver inks, marked A, B and C, were used and tested. Findings The results indicated that the important factors in the pad printing of silver ink conductors are the printing parameters and characteristics of the ink, pad, cliché and substrate. The interactions of these factors should be considered on a case-by-case basis. The sheet resistances of triple-pressed ink conductors varied between 20 and 110 mΩ/sq for 5.7- to 8.5-μm-thick conductors. Ink (B) had a higher sheet resistance than Ink (A) because of its lower silver particle content but also because of the shorter curing time and lower curing temperature. Ink (A) showed excellent adhesion on PET, and Ink (B) had moderate adhesion on PET without corona or plasma pre-treatments, but both inks adhered weakly on PPO compound. Both corona and plasma treatments raised adhesion of these two inks on all test substrates to the highest classification value, 5B. Originality/value This paper contains a survey and preliminary testing of the pad printing of polymeric silver ink conductors on flexible thermoplastic foils. Finally, the paper introduces the advantages and drawbacks of the technique.

scholarly journals Teachers’ motivation and its influence on quality education: A study at a center for foreign languages in Vietnam

2020 ◽  
Vol 12 (3) ◽  
Author(s):  
Luu Nguyen Quoc Hung
Keyword(s):  
Common Factors ◽  
Quality Education ◽  
Foreign Languages ◽  
Small Scale ◽  
Group Discussions ◽  
Factors Affecting ◽  
University Teachers ◽  
Level Of Motivation ◽  
Relationship Of

Teacher is one of the most important elements in education. The quality of education is largely determined by the teacher’s quality. Few would argue against the view that motivated staff are a central resource for the success and quality of an organization, and thus attention needs to be given to examining teachers’ motivation as a key to guaranteed quality education. At the Center of Foreign Languages, Can Tho University, teachers are always recognized as key factors for the success of the institution. This small-scale study was conducted with 42 teachers of English of the Center for Foreign Languages with the aim to examine common factors affecting teachers’ motivation and their perceptions towards quality education. The results of the survey revealed the most common factors for teachers’ motivation and the findings from focus group discussions indicated the positive relationship of teachers’ level of motivation with quality education.

scholarly journals Pandemic-Driven Development of a Medical-Grade, Economic and Decentralized Applicable Polyolefin Filament for Additive Fused Filament Fabrication

Molecules ◽  
2020 ◽  
Vol 25 (24) ◽  
pp. 5929
Author(s):  
Felix Burkhardt ◽  
Carl G. Schirmeister ◽  
Christian Wesemann ◽  
Massimo Nutini ◽  
Stefano Pieralli ◽  
...  
Keyword(s):  
3D Printing ◽  
Large Scale ◽  
Cost Benefit ◽  
University Hospital ◽  
Digital Data ◽  
Patient Treatment ◽  
Great Promise ◽  
Scale Production ◽  
Fused Filament Fabrication ◽  
Medical Standards

A polyolefin with certified biocompatibility according to USP class VI was used by our group as feedstock for filament-based 3D printing to meet the highest medical standards in order to print personal protective equipment for our university hospital during the ongoing pandemic. Besides the chemical resistance and durability, as well as the ability to withstand steam sterilization, this polypropylene (PP) copolymer is characterized by its high purity, as achieved by highly efficient and selective catalytic polymerization. As the PP copolymer is suited to be printed with all common printers in fused filament fabrication (FFF), it offers an eco-friendly cost–benefit ratio, even for large-scale production. In addition, a digital workflow was established focusing on common desktop FFF printers in the medical sector. It comprises the simulation-based optimization of personalized print objects, considering the inherent material properties such as warping tendency, through to validation of the process chain by 3D scanning, sterilization, and biocompatibility analysis of the printed part. This combination of digital data processing and 3D printing with a sustainable and medically certified material showed great promise in establishing decentralized additive manufacturing in everyday hospital life to meet peaks in demand, supply bottlenecks, and enhanced personalized patient treatment.

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