Rancang Bangun dan Simulasi 3D Printer Model Cartesian Berbasis Fused Deposition Modelling

<p><em>The process of designing and manufacturing a Cartesian 3D printer model based on Fused Deposition Modelling (FDM) is carried out to produce a 3D printer machine that can perform the printing process accurately and quickly. In this research, the process is divided into three stages, namely designing using Computer-Aided Design (CAD) software, printing and assembling components of a 3D printer machine, and analysing the mechanical structure of a 3D printer machine. This 3D printer is designed to carry out the printing process with an area of 180x180x150 mm. Some components of 3D printing machines use Polylactic Acid (PLA). The simulation results based on the Finite Element Method show that the 3D printer engine is feasible to produce printing with a mass of 40% of the maximum possible load.</em></p>

A Novel Suction-and-Irrigation Laparoscopic Surgical Instrument: Internal Design and Preclinical Performance Evaluation

Objective: Laparoscopic instruments with suction and irrigation functions often lead to tissue damage during removal of the aspirated tissues, owing to the presence of aspiration into the side holes of their catheters. To address this problem, we designed a novel irrigation-and-suction catheter and assessed its preclinical efficacy. Methods: We made structural improvements to the irrigation-suction catheter to prevent tissue aspiration through its side holes. We ran a simulation program to perform experimental assessments before printing out the catheter tip models using a three-dimensional printer. Model 1 was the control, and Models 2, 3, and 4 were the improved models. Using these, we performed 10 repetitions of 15-s suction followed by 15-s irrigation, for a total of 5 times per model. We recorded the number of aspirations that occurred through the side holes and analyzed each model using nonparametric methods. Results: Models 2 and 3 showed fewer aspirations because the velocity and pressure around their side holes were lower than those of Model 1; this was statistically significant. On the other hand, Model 4 had a lesser preventive effect against aspiration due to higher velocity and pressure around its side holes. Conclusion: We confirmed that side-hole aspiration can be prevented with an internal structure that completely separates the irrigation and suction paths. Even if the irrigation and suction paths are not completely separated, adding a septal structure at the distal end of the catheter may prevent aspiration.

DESAIN PROTOTY PE PART DENGAN 3D PRINTER MODEL FDM DIMENSION SST 1200ES

Tingginya persaingan antar produk-produk industri menuntut dikembangkannya sistem produksi yang tepat waktu, efisien dan mampu menghasilkan produk yang berkualitas. Ketersediaan suatu produk baru dipasar ternyata merupakan faktor penentu eksistensi produk tersebut. Dengan mempercepat waktu perealisasian konsep desain menjadi bentuk prototipe sebelum masuk dalam sistem produksi masal merupakan salah satu terobosan untuk memperkuat daya saing produk industri. Pengaplikasian teknologi printer 3D merupakan alasan untuk mereduksi c y cle tim e dalam produksi. Salah satunya pembuatan prototipe menggunakan mesin 3D Printer Fused Deposition Modeling (FDM) Dimension SST 1200ES. Tujuan dari penelitian ini adalah untuk mendesain prototype part dengan 3D Printer FDM Dimension SST 1200ES. Hasil penelitian menunjukkan, pengoperasian mesin 3D printer FDM Dimension SST 1200ES ini sangatlah mudah karena mesin ini mempunyai software khusus untuk pengoperasiannya yaitu CatalystEX yang digunakan untuk setting prototipe yang akan dibuat sesuai dengan kebutuhan. Keuntungan membuat prototipe dengan menggunakan mesin 3D printer ini adalah hasil prototyping kuat, stabil, presisi, efisien dan biayanya murah.

Research, study, design and development of an artificial ear splint model by using a 3D printer

The aim of this research study centers around the design and development, using a three-dimensional model of an ear-splint. This study results from the need of a non-invasive method, as the current techniques used in otoplasty have succeeded in reducing the risk of complications, but without drastically reducing the rate of postoperative deformity. Indeed, stick out ears present a deformity that occurs in 5% of the population. Factors such as psychosocial impact and intimidation lay the foundations for the need for such a method. This paper essays to create, through 3D printing, a case customized into the ear of any person of all ages. The splint was made on Zortrax M200 3D printer model, equipped with the V3 Hotend head, and the material used for printing was 16 grams of Z-FLEX. It is noted that the creation of the case is innovative and original. After putting the ear-splint into test, by applying it on a human ear, two conclusions emerge. First, it is very light, weight, just 16 grams, and second, it offers comfort and convenience to the user. In order to get results for its practicality, a clinical rehabilitation study is recommended.

Experimental Determination and Comparative Analysis of the PPH030GP, ABS and PLA Polymer Strength Characteristics at Different Strain Rates

Nowadays the field of application of products made from polymer materials is constantly increasing. These products find their wide application in the most high-tech industries such as automotive, aerospace and medical industry. Modern trends in the development of the automotive industry predicts that 75 % of the total car mass will be replaced with polymer materials by 2020 and other industries demonstrate similar trends. Regarding to this information, engineering companies that design parts of the automotive industry should have polymer material characteristics over an entire range of deformations up to destruction for their performance prediction. However, strength characteristics of products from polymers are different and depend not only on a polymer grade but also on technology used for part production. Existing literature review on this problematic area is rather rare. The purpose of this paper is to determine and analyze mechanical characteristics of widely used PPH030GP polymer obtained by extrusion and ABS, PLA polymers applied while manufacturing samples using an additive method (3D-printing) depending on the rate of high-elastic deformation. All the samples have been made according to the requirements of GOST 11262–80 and subjected to uniaxial stretching on a tensile machine UIT STM 050/300 at different speeds of clamp expansion. According to experimental results, stretching diagrams in conditional coordinates s–e have been obtained up to the point of failure for different rates of clamp expansion. It has been shown that while using the additive method, a direction of layers and adhesion between them, which depends on 3D-print parameters, have a significant effect on the part strength. Printing settings are indicated in accordance with the selected mode and a 3D-printer model. As a result of data processing, strength characteristics of PPH030GP polymer and ABS and PLA polymers have been determined to a sufficient extent, depending on the direction of printing layers and rate of high-elastic deformation. These data can be used to calculate strength of products by numerical methods and a finite element method in various software products.

Science Family skills: An Alexa Assistant Tailored for Laboratory Routine

ABSTRACTVoice User Interfaces such as Amazon Alexa and Google Home are already widely available and used for personal purposes. These services could be used to improve experimental biology laboratory routine, facilitate troubleshooting and increase efficiency. Till date, no applications that are tailored to enhance laboratory routine have been made available. Here, we present a set of free-to-use, open source tools adapted to Alexa for application in the laboratory environment, with prospects of enhancing productivity and reducing work-related stress. All skills, 3D printer model and source codes are freely available in the Alexa app store and in GitHub.