This specification covers a corrosion and heat-resistant nickel-chromium-iron-molybdenum-alloy in the form of pre-alloyed powder manufactured by atomization in an inert gas.

AMS F Corrosion Heat Resistant Alloys Committee

Design for Manufacturing: Tips for Molding Components in Silicone

TBMG-3356001/01/2019

Device functionality is usually the starting point when designing devices. Another element that needs to be considered when designing devices and their subsequent components is their manu-facturability. Part design should also be focused on the ease of manufacturing because it can help reduce cost and lead to a robust and reliable process. Several aspects should be considered regarding manufacturabil-ity: part geometry, location, and size and shape of critical surfaces, among others. These may seem like more obvious characteristics, but there are a few others that can be overlooked, but should be considered just as important. These are material selection, dimensioning/tolerancing, and the selection of critical dimensions. To better understand the impact of these factors, this article explores each characteristic in detail.

SAE International Journal of Sustainable Transportation, Energy, Environment, & Policy

E-JOURNAL-1301/01/2019

Call for Special Issues – SAE International Journal of Sustainable Transportation, Energy, Environment, & Policy Call for Papers for Special Issue on Mobilizing Sustainable Transport Solutions Using Lightweight Material Call for Papers for Special Issue on Advances in Green Driving and Sustainable Energy Practices Call for Reviewers Watch discussion about the Journal with Editor-in-Chief Srikanth Pilla Editor-in-Chief: Dr. Srikanth Pilla, Clemson University, Robert Patrick Jenkins Endowed Professor; Founding Director, Clemson Composites Center; International Center for Automotive Research, USA Indexed in CNKI Engineering Village (Ei Compendex) IET Inspec Author Resources Call for Papers Library Recommendation Form Published Volumes Aims and Scope The SAE International Journal of Sustainable Transportation, Energy, Environment, & Policy is a new peer-reviewed journal that provides a forum for the exchange of novel, innovative, and transdisciplinary ideas on incorporating and enhancing

Compression Molding Press

TBMG-3336312/01/2018

Beckwood Press Company Fenton, MO 636-343-4100

MIM and 3D Printing: Precision Cleaning and Product Finishing of Medical Devices

TBMG-3325111/01/2018

As the miniaturization trend continues to take the medical device world by storm, manufacturing with metal injection molding (MIM) and additive processes such as 3D printing are gaining widespread acceptance, allowing designers more options for creating parts economically that would otherwise be impossible to manufacture. In many instances, these state-of-the-art MIM and 3D printed processes are not possible without the use of special cleaning and or solvent-based process treatments.

Research Collaboration Could Reshape Injection Molding

TBMG-3308810/01/2018

As Ralph Colby peers at the microscope image in front of him, he thinks he can make them out — “shish kebabs,” as polymer scientists call them. Nobody knows for sure what they are, but these shapes that appear at seemingly unpredictable times when certain plastics cool have a big impact on the overall properties of plastics. It's not a big deal when a plastic fork breaks, but if a bearing cage on an airplane were to break, it could put people in danger.

Ensuring Injection Molding Quality for Medical Devices

TBMG-3308910/01/2018

Plastics are incredibly versatile. There are thousands of types available to satisfy a myriad of medical applications. Yet, certain plastics present special challenges during the injection molding process that — if not properly addressed — can impact product quality and ultimately preclude medical devices from meeting exacting specifications. The medical device or component cannot — and must not — fail. To do otherwise increases the risk of recall, warranty claims, and litigation. In worst-case scenarios, failure may prove lethal.

Two-Component Molding Can Solve Medical Design Challenges and Reduce Costs

TBMG-2892505/01/2018

Device manufacturers count on their supply chain partners for answers. What can be adjusted, how can we add value, and what methods can be used to streamline manufacturing processes, reduce SKUs, and improve part quality? One way is by moving from single-component molding to two-component molding.

Carbon Fiber/Epoxy Mold with Embedded Carbon Fiber Resistor Heater - Case Study

05-11-02-001104/07/2018

The article presents a complete description of the design and manufacturing of a Carbon Fiber/epoxy mold with an embedded Carbon Fiber resistor heater, and the mold performances in terms of its surface temperature distribution and thermal deformations resulting from the heating. The mold was designed for manufacturing aileron skins from Vacuum Bag Only prepreg cured at 135°C. The glass transition temperature of the used resin-hardener system was about 175°C. To ensure homogenous temperature of the mold working surface in the course of curing, the Carbon Fiber heater was embedded in a layer of a highly heat-conductive cristobalite/epoxy composite, forming the core of the mold shell. Because the cristobalite/epoxy composite displayed much higher thermal expansion than CF/epoxy did, thermal stresses could arise due to this discrepancy in the course of heating. Therefore, to lower these stresses, the Carbon Fiber/epoxy faces were separated from the cristobalite/epoxy core containing the

Czarnocki, Piotr, Boczkowska, Anna, Frączek, Wojciech, Chabera, Paulina, Kubis, Michał, Marjanowski, Jędrzej

Microextrusion Tubing Advances Help Push Medical Device Boundaries

TBMG-2852003/01/2018

Over the past five years, technological advances have enabled product applications for microextrusion to penetrate into the medical OEM arena. Simply speaking, micro now really means micro. Years ago, when an OEM was asking for micro tubing, they typically were looking for ranges between 0.060 and 0.100 in. OD with 2-4 lumens. Now micro range dimensions are down to 0.024 in. OD with up to 6 lumens, including an ID range as low as 0.003 in.

Optimizing Performance and Value of Medical Devices with the Right Plastic Processing Technology

TBMG-2797612/01/2017

Application of Six Sigma Methodology to Improve Product Quality in Injection Molded Parts at Supplier End in Motorcycle Industry

2017-01-501109/29/2017

Process Parameters play a vital role in product quality of Injection Molded components. Variation in process parameters will lead to Injection Molded manufacturing defects like Sink Mark, Flow Mark, Silver Streak, Flash, Warping, Weld lines, Jetting, voids, Short Shot & Bubbles. This manuscript is innovative because suppliers (Tier 1 and Tier 2) do not use DoE for standardization of their process parameters in Injection Molding and High Pressure Die Casting. They do trial and error method to arrive at the process parameters which is error prone and time consuming. The variation of process parameters can be optimized using Six Sigma approach, a structured methodology which is Process focused & data driven approach. The purpose of this paper is to present through a case study how the concepts of Design of Experiments, which is a part of Six Sigma Methodology can be used for improving the Injection Molding Process at supplier end reducing defects & hence improving Quality at supplier

Shankaranarayana, Raviprakash

Dr. Keiko Munechika, Manager, Nanofabrication, aBeam Technologies, Hayward, CA

TBMG-2740708/21/2017

Dr. Munechika — along with Alexander Koshelev and Giuseppe Calafiore at aBeam Technologies, and Stefano Cabrini at the Molecular Foundry at Lawrence Berkeley National Laboratory — is developing a process that would enable widespread adoption of nano-optic technology. The team perfected a technique for fabricating a Campanile probe, whose tapered, four-sided shape resembles the top of the Campanile clock tower on UC Berkeley’s campus. The probe focuses an intense beam of light onto a much smaller spot than is possible with current optics.

Linear Fresnel Spectrometer Chip with Gradient Line Grating

TBMG-2729108/01/2017

NASA's Langley Research Center has built a very small spectrometer by integrating a differential linear Fresnel lens onto an imaging chip. NASA is using the lens/chip in a very small spectrometer that will be mounted on the tires of a rover to analyze soil on the Moon or Mars. The spectrometer is useful for space-constrained applications. It combines good resolution with small size and potentially reduced manufacturing costs. The ultra-compact integration of the spectrometer is enabled by the use of an optimized Fresnel grating. Since Fresnel imaging works as valid focal points of spectrum within the short optical distance, the shorter optical path length required (compared to a traditional Fraunhofer lens) enables the small size. Further, the evolution to a differentially linear Fresnel lens (instead of circular Fresnel) avoids the need for aperture slit driver electronics and moving parts, and simplifies manufacturing. The linear Fresnel gratings lend themselves to mass production

Adam Sidor, NASA Research Fellow, Georgia Institute of Technology, Atlanta, GA

TBMG-2710206/20/2017

Thermal Protection Systems (TPS) — heatshields — form the outer surface of spacecraft and provide protection as the vehicle plunges through planetary atmospheres. Conformal ablative materials are currently being developed to improve TPS performance. Adam Sidor is developing a fresh approach to designing and manufacturing these materials to produce larger tile sizes while reducing labor, cost, and waste.

Polyimides Derived from Novel Asymmetric Benzophenone Dianhydrides

TBMG-2685105/01/2017

NASA's Glenn Research Center invites companies to license or establish partnerships to develop its patented high-temperature, low-melt imide resins for fabrication of automotive components. Produced by a solvent-free melt process, these resins exhibit high glass transition temperatures (Tg = 370 to 400 °C), low melt viscosities (10 to 30 poise), long pot-life (1 to 2 hours), and can be easily processed by low-cost RTM and vacuum-assisted resin transfer molding (VARTM). These RTM resins melt at 260 to 280 °C, and can be cured at 340 to 370 °C in 2 hours without releasing any harmful volatile compounds.

Nanotubular Toughening Inclusions

TBMG-2688205/01/2017

NASA's Langley Research Center has developed an extensive technology portfolio on novel methods for effective dispersion of carbon nanotubes (CNTs) in polymers. The technology portfolio extends from making stable dispersions of CNTs in polymer resins to processes for making composite CNT/polymer films and articles. The technologies apply to a range of polymer types, enable low or high CNT loadings as needed, and can be used with a variety of standard polymer processing methods, including melt processing. Currently, the technology is being used commercially for electrically conductive polymer films for components in electronic printers and copiers.

Fatigue Life Prediction of Injection Molding Tool

2017-01-034003/28/2017

Injection molding tools are expensive and the fatigue failure during production would result in very costly rework on the tool and downtime. Currently, mold designs are mostly based on expert experience without a careful stress analysis and the mold tool life cycle relies largely on rough estimates. The industry state of the art applies averaged temperature change and peak pressure load on the mold tool. The static analysis is then performed. Mold temperature history and thermal shock are not considered in the durability analysis. In this paper, a transient thermal analysis of the tool is performed in conjunction with the injection molding process simulation. The spatial and temporal variation of temperature, pressure and clamping forces are exported from Moldflow simulation. These histories of temperature and pressure are converted to appropriate loading curves and mapped into Abaqus FEA model. A transient FEA simulation is performed in Abaqus for the length of the cycle time with

Lu, Li, Zhou, Jane, Iyer, Ram, Webb, Jeffrey, Woods, Derren, Pietila, Thomas

Study on Cycle Time Reduction of Injection Molding Using CAE

2017-01-048903/28/2017

Cost reduction is an important issue in the intense competition automotive industry. Interior parts which are mainly consist of plastic have same issue. The manufacturing main processes of plastic products are injection and assemble and the cost of injection depends on injection cycle time. Therefore many studies for the reduction of injection cycle time have been implemented. However the researches based on engineer's experiences have limits so, nowadays many studies utilize CAE. In this paper, the study for the reduction of cycle time focused on injection molding design. To satisfy appearance quality with the reduction of cycle time, the design of injection molding was optimized by using CAE. The result of CAE showed many causes and effects of problems. The optimization of injection molding design improved the quality with the reduction of cycle time. Finally, the product based on CAE showed good quality and cycle time reduction in comparison with previous products.

Jo, Hyunkwon, Kim, Jongsoo, Park, Jaemin, Yang, Heeseung, Park, Hyunmin

CABLE ASSEMBLY, EXTERNAL ELECTRIC POWER, AIRCRAFT 28 VOLT DC, OPERATING POWER

AS90347A (Historical)11/12/2016

AE-8A Elec Wiring and Fiber Optic Interconnect Sys Install

Methods to Improve the Surface Quality of Microcellular Injection Molded Parts - A Review

2016-36-022410/25/2016

The microcellular foam injection molding process is being widely applied by the thermoplastics industry. This process consists in a melted polymer injection mixed with a processing solvent, that is an inert gas in the supercritical state, usually CO2 or N2 producing a microcellular foam. This technique offers many advantages such as weight reduction, dimensional uniformization and less warpage. Besides that, it offers a satisfactory property like acoustic and thermal insulation. On the other hand, the parts from this process have an inferior mechanical property like ductility and toughness if compared with solid injection molded parts. Nevertheless, the main issue for this process is the poor appearance quality. This paper presents a review of some existing methods for surface quality improvement as Co-injection process, where a skin is injected over the microcellular part, and Heat & Cool that consists in a control of mold temperature. All the processes addressed were effective in the

Lima, Carla, Andrade, Filipe, Kawakami, Cristina, Gonçalves, Cristiane, Peraro, Walmir

Composite and Bonded Structure Engineers: Training Document

AIR5278 (Current)

10/13/2016

This document provides recommendations concerning the minimum knowledge and analytical skill guidelines for a composite and metal bond repair design engineer. Teaching levels have been assigned to this curriculum to define the knowledge, skills and abilities needed to design appropriate repairs. Minimum hours of instruction have been provided to ensure adequate lecture and laboratory coverage of all subject matter. These minimums may be exceeded, and may include an increase in the total number of training hours and/or increases in the teaching levels.

AMS CACRC Commercial Aircraft Composite Repair Committee