Browse Topic: Molding

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Numerical Investigation on Thermo-Mechanical Characteristics of Injection-Molded Thermoplastics using Anisotropic Material Properties2026-26-02801/16/2026
This paper presents a comprehensive numerical method intended at developing a coupled process structure simulation that integrates both elastoplastic and anisotropic material behavior for short glass fiber-reinforced injection-molded thermoplastics. Three engineering tools, namely Moldflow, Digimat, and ABAQUS are used in the current numerical methodology to assess material anisotropy and its influence on thermo-mechanical characteristics. The simulation incorporates fiber orientation concerns as well as potential injection molding defects known as weld lines, linking with thermo-mechanical simulations. The behavior of real injection-molded components is computationally represented by the ability to transfer data from injection molding software (Moldflow) to structural software (ABAQUS). Besides, integrating with multi-scale modeling software Digimat as an interface tool, the results of the Moldflow simulations, such as fiber orientations and weld-line properties transmitted directly
T, KALINGA, Yanamadala, Dharma Teja, Mattupalli, Venkata, Chirravuri, Bhaskara, Miller, Ronald
Development of a GUI-Based Pitch Sequence Optimization Tool for Tyre Noise Reduction2026-26-03301/16/2026
Minimizing tyre noise is essential for enhancing ride comfort, especially in electric vehicles where the absence of engine noise makes tyre-generated sound more prominent. This work presents the development of a GUI-based pitch sequence optimization tool to support tyre design engineers in generating acoustically optimized tread sequences. The tool operates in two modes: without constraints, where the pitch sequence is optimized freely to reduce tonal noise levels; and with constraints, where specific design rules are applied to preserve pattern consistency and manufacturability. This tool plays a pivotal role in the tire development process, serving as one of the key evaluation criteria for tread pattern approval before mould fabrication. By enabling engineers to generate balanced, low-noise pitch sequences that align with both acoustic targets and engineering constraints, the tool facilitates faster design iterations and smooth integration with downstream processes. Its successful
Sampathraghavan, Lakshmi, Ramarathnam, Krishna Kumar, Mantripragada PhD, Krishna Teja, Ramachandran, Neeraj
Evaluating the Suitability of ADC12 for Sand Casting: Filling, Solidification, and Mechanical Properties2026-26-02961/16/2026
This research investigates the applicability of ADC12 aluminum alloy in sand casting processes and compares its casting behavior and performance with that of conventionally sand-cast alloys such as A356 and AlSi10Mg. ADC12 is primarily utilized in high-pressure die casting (HPDC) and low-pressure die casting (LPDC) due to its excellent castability, pressure tightness, and favorable mechanical properties in thin-walled components. However, its use in sand casting is minimal globally, primarily due to the alloy’s high silicon and iron content, which can lead to poor feeding characteristics, increased porosity, and structural non-uniformity in non-pressurized molds. In this study, 3 mm thick test castings were produced using conventional sand casting methods, with particular attention to mold and core design to simulate challenging flow and solidification conditions. Comparative castings of A356 and AlSi10Mg were also produced under identical conditions to establish performance baselines
Subramani, Rajesh, Jichkar, Pawan
A numerical approach to optimize the flow characteristics for the enhancement of casting soundness of Al 6061 alloy die-casting2026-26-02841/16/2026
The optimization of flow characteristics such as filling time, flow velocity, viscosity and temperature play a vital role in the die-casting to enhance the casting soundness. Experimental trial and error methods for optimizing the flow characteristics of mold filling are costlier and time-consuming methods. A digital approach could significantly minimize the cost and time for the prediction of the flow characteristics of the casting. Z-Cast Pro is the casting simulation software used for simulating the whole casting process such as filling, solidification etc. This software basically utilizes the finite difference and finite volume approximation techniques to numerically unravel the molten metal flow and solidification equations. In this study, A 3D model of the valve housing is used to analyze the mold-filling behavior through high and low-speed plunger movement of the molten Al 6061 alloy using Z-Cast Pro software version 24. Higher-speed plunger movement required a total mold
Choudhary, Chandan, Subramaniam, Anand, Karle, Manish, Karle, Ujjwala
Multi-objective Optimization of Rotorcraft Blade Structure with Multi-disciplinary ConstraintsF-0081-2025-03385/20/2025
We extend the previously developed integrated VABS (iVABS) framework for rotor blade structural optimization with an enhanced cross-section template for practical manufacture considerations; these include the introduction of curved spar corners, a continuous wrap-around skin, trailing-edge tabs and a conformal non-structural mass. The added fidelity is exercised on a UH-60A-based outer mold line through three multi-objective optimization case studies, including a case where the cross-sections are optimized independent of each other, and two cases where all the cross-sections are optimized simultaneously with manufacture considerations. It was found that the latter cases produce straight spars that are relatively more practical to manufacture when compared to the first case, while achieving significant reduction of up to 80% in the mismatch of stiffness values, inertia properties, and shear center locations, when compared to the prior work. A subsequent sensitivity analysis of the
Song, Jiwoo, Zhang, Jianhua, Smith, Edward, Haehnel, Robert, Huang, Daning
Improving the Sound Transmission Loss of Wire Harness Pass Throughs2025-01-01185/5/2023
Abstract Improving the Sound Transmission Loss of Wire Harness Pass Throughs For years the NVH community has known that openings in the dash sheet metal, such as holes to pass wire harnesses through, create an acoustical weak point that limits the potential noise reduction of the dash insulation system. These pass throughs can also be a source of water leaks into the vehicle’s interior. With the combustible engine and now electric inverter power plants, the need to seal this area is vital. By molding a lightweight barrier that draws through the fiber/absorber interior decoupler and dash sheet metal which mates to a secondary seal molded into an outer engine dash decoupler, the two opposing molded barriers meet in the engine compartment and compress together forming a seal around the wire harness. This male/female molded seal replaces the conventional snap in grommet and eliminates noise/water leaks. The system Sound Transmission Loss (STL) is equivalent to similarly insulated sheet
Check, James, Moritz, Charles
New system for the measurement of sound-insertion loss on small samples: a comparison with ASTM-E2611 and ASTM E90 test procedures2025-01-01165/5/2023
This article follows a companion article presented at the SAE NVC 2021, in which a new system for the measurement on small samples of the normal-incidence Insertion Loss (IL) of multilayers used for the manufacturing of automotive sound package parts was first introduced. In addition to simplifying the evaluation of the sound-insulation of multi-layers used to produce sound-package components, the system aims to overcome the limitations of the test procedure based on the ASTM E2611 standard. In this article, the latter point is demonstrated by comparing the insertion loss results obtained with the new system with those obtained with the test procedure based on the ASTM E2611 standard on a few multilayers commonly used for the manufacturing of automotive sound package parts. Results indicate that the results obtained by means of the newly developed system are more meaningful, practically usable and less prone to edge-effects, compared to those obtained according to the ASTM E2611 test
Ruggeri, Giulio, Bertolini, Claudio
An Integrated Approach for Simulation of the RTM Process2022-01-03873/29/2022
In the preform preparation stage of the RTM process, the fabric is draped on the mold along the geometry. Before the filling and warpage analysis, the draping analysis will be performed to get the fabric orientation. Due to the anisotropy of the fabric material, the main direction of the material has a significant influence on the overall flow behavior and warpage of the product. In this study, the advanced simulation approach for the RTM process is demonstrated. The filling and warpage analysis integrate with the draping simulation result from AniForm. The influences of fabric shearing and fiber orientation on the resin flow and warpage in RTM process is studied. With more accurate fabric orientation prediction methods, the accuracy of predicting fabric ply orientation is improved and more accurate infusion and product warpage simulation results can be obtained.
Bora, Anand
Ultra High Pressure sensor with MEMS sensor element mounted on the measurement membrane manufactured by MIM2022-01-02823/29/2022
This paper presents a ultra high pressure sensor composed the measurement membrane manufactured by MIM(Metal Powder Injection Molding). The membrane should be sufficiently deformed within the measuring pressure range and not be broken at the burst pressure. Therefore, in general, the high pressure sensor membrane made of metal using machining methods such as milling and drilling [1]. However, it requires additional process to assembly with other parts and is difficult to make complex structure such as screw. Thus, in this paper, we propose the product and design of the measurement membrane using the MIM method. We have developed the ultra-high pressure sensor capable of measuring to 900 bar.gauge. Figure 1 shows the ultra-high pressure and measurement part. The measurement membrane thickness is 900 ㎛ and diameter is 3.2 mm. The MEMS sensor element mounted on the measuring membrane surface outputs an electrical signal according to the pressure. The electrical circuit with ASIC
Jeon, Myounggun
Impact of chemical blowing agent on polypropylene properties2021-28-020310/1/2021
Weight reduction and material saving goals in automotive applications have led to the processing of thermoplastic polymers by foam injection molding. The density of the foamed polymer can be reduced up to 20%. Whilst, work has been reported on the weight reduction of the foamed polymer by using different types of blowing agent technologies, there has been limited studies in the areas of the sound transmission loss and material dampening properties of these materials. The present study is intended to understand the effect of chemical blowing agent (CBA) on the properties of polypropylene. The molded specimens were characterized against the density, Tensile property, flexural property, Izod impact, heat deflection temperature, differential scanning colorimetry (DSC), thermogravimetric analysis (TGA), Fourier transform infra-red spectroscopy (FT-IR), sound transmission loss (STL) properties as per standard test protocol and cell structures by stereo microscope. Obtained results indicates
Shukla, Sandeep Kumar, Balaji, K V
MOLD IN COLOR PIANNO BLACK PC MATERIAL FOR AUTOMOTIVE EXTERIOR APPLICATION2021-26-02429/22/2021
Aesthetics contribute significantly to the customer buying decision of an automobile. This is traditionally achieved through painting. Sustainability and cost challenges have led automakers to look at substituting painting through molded-in color polymers in decorative bezels like pillar appliques. These appliques and bezels have a unique mix of material requirements that include color tone, gloss, stiffness, scratch resistance and weathering. Polycarbonates are an interesting class of polymers that has potential to meet these challenging requirements. This paper reports the work done in evaluating a polycarbonate compound in piano black shade to meet the functional and aesthetic requirements. The results prove that the material can substitute painting thereby resulting in significant cost savings.
Govindaraj, Karthik, Vimalathithan, Murukesan, Balaji, K V, Samir, Gandhi, hebbar, vinayak
Bars, Rods, and Shapes Produced from Unfilled Polyamide-Imide (PAI) MaterialAMS3670/1C (Current)5/19/2021
This specification covers an unfilled polyamide-imide plastic in the form of molded or extruded bar, rod, and shapes. This is designated as Grade 2 material per AMS3670.
AMS P Polymeric Materials Committee
Painless Paper Patch Test for Glucose Levels Uses MicroneedlesTBMG-386413/1/2021
Patches seem to be all the rage these days. There are birth control patches, nicotine patches, and transdermal medicinal patches, just to name a few. Now, a team of researchers at the Institute of Industrial Science, The University of Tokyo, have developed a patch of needles connected to a paper sensor for diagnosing conditions such as prediabetes. Luckily, this patch doesn't multiply the pain and discomfort of a single hypodermic needle. In fact, these microneedles are painless and biodegradable.
4D Printing of Morphing StructuresTBMG-384942/1/2021
Soft robots and biomedical implants that reconfigure themselves upon demand are closer to reality with a new way to print shapeshifting materials. Researchers have developed a method to print objects that can be manipulated to take on alternate forms when exposed to changes in temperature, electric current, or stress.
Linking Materials May Transform Robots Made of RobotsTBMG-385012/1/2021
A method was developed that unifies the construction of varying types of mechanical metamaterials using a discrete lattice, or LEGO-like system, enabling the design of modular materials with properties tailored to their application. These building blocks and their resulting materials could lead to dynamic structures that can reconfigure on their own; for example, a swarm of robots could form a bridge to allow troops to cross a river. This capability would enhance military maneuverability and survivability of warfighters and equipment.
Painless Paper Patch Tests Glucose LevelsTBMG-383451/1/2021
Researchers have been trying to develop a practical way to use microneedles — tiny needles less than 1 mm in length — for routine at-home medical monitoring. Microneedles are so short that they stay within the skin and do not make contact with any neurons, meaning that they cause no pain. Rather than extracting blood, they draw up fluid in the skin that contains most of the important biomarkers that blood tests look for. Several types of microneedles exist but until now, making a practical device that quickly analyzes the fluid has proved elusive.
4D Printing of Morphing StructuresTBMG-373948/1/2020
Soft robots and biomedical implants that reconfigure themselves upon demand are closer to reality with a new way to print shapeshifting materials. Researchers have developed a method to print objects that can be manipulated to take on alternate forms when exposed to changes in temperature, electric current, or stress.
Engineers Design a Reusable, Silicone Rubber Face MaskTBMG-373598/1/2020
Researchers at MIT and Brigham and Women’s Hospital have designed a new face mask that they believe could stop viral particles as effectively as N95 masks. Unlike N95 masks, the new masks were designed to be easily sterilized and used many times.
Metal Injection Molding Offers OEMs Edge and Safety with DisposablesTBMG-371176/1/2020
Medical instruments used in surgery today often require more elaborate features and added functionality than they did in the past, largely due to the growth in minimally invasive surgery. For this reason, greater attention to detail is critical in product design and development. To meet the demand for small, complex, lightweight surgical products, medical device original equipment manufacturers (OEMs) are increasingly opting for disposable surgical tools and product offerings, which provide flexible, off-the-shelf single-use sterile solutions to surgeons and hospitals.
Micromolding: Achieving Exacting Medical Device Manufacturing RequirementsTBMG-369295/1/2020
It is undoubtedly fair to say that one of the key sectors driving innovation in the area of micromolding is the medical device industry. Demand for minimally invasive curative and diagnostic procedures is growing exponentially, and because of this, medical device manufacturers have been designing (and seeking to manufacture) smaller and smaller components, with thinner walls, and complex and miniature features. Couple this with the overarching demand from patients and healthcare providers to rationalize the costs associated with medical treatment, and medical device OEMs are constantly on the lookout for cost-effective and efficient manufacturing processes.
Moving metal AM forward20TOFHP04_034/1/2020
Additive-manufacturing system providers still see technical and throughput challenges, but significant developments and market inroads will be made in 2020. The global 3D-printing metals market was estimated to be US $774 million in 2019, according to a recent research report by MarketsandMarkets. The research company projects the market to reach more than US $3.1 billion by 2024, at a compound annual growth rate of 32.5% from 2019 to 2024. Driving this growth is the increasing demand for 3D-printed metals from aerospace & defense and automotive end-use industries, low manufacturing cost, and reduction in lead times, the report says. Another key factor that will influence growth is quality assurance: metal additive manufacturing (AM) machines must be able to consistently produce a high level of repeatable quality parts.
Gehm, Ryan
Q&A: Solid Silk - A Biocompatible, Sustainable, Degradable Building BlockTBMG-361753/1/2020
David Kaplan, Stern Family Professor of Engineering at Tufts University’s College of Engineering, and his team have developed a unique and practical method for processing silk into solid form for products such as rods and plates for medical implants.
JLR tackles weight with structural electronics20AUTP03_103/1/2020
Ashutosh Tomar, electrical research technical manager at Jaguar Land Rover (JLR) said he has absolute confidence in the potential of structural electronics (SE) now being pioneered by the company. Dubbed LESA (Lightweight Electronics in Simplified Architecture), the technology is expected in upcoming JLR models, though its use in the next-generation Jaguar XJ to be launched in 2020 has not been confirmed. JLR is completing a successful R&D program into printed SE, initially to introduce curved dashboard screens. The company claims an industry first that has the potential to radically alter vehicle interiors, with other applications forthcoming. SE is not a new technology. Decades ago the aerospace industry was considering it as part of aircraft-surface morphing capability to adapt to varying flight conditions.
Birch, Stuart
Reducing Risk with Geometric Transition ExtrusionTBMG-3549811/1/2019
In an effort to design smaller, more intricate and complicated medical devices without running afoul of increasingly stringent national and international regulations, many designers are looking to geometric transition extrusions manufactured of high consistency rubber (HCR) silicone. This process reduces total cost of ownership for the original equipment manufacturer while improving part quality and greatly enhancing the types of devices being sought by healthcare providers.
Customer Challenges Lead to Innovative SolutionsTBMG-3533610/1/2019
Contract manufacturers have an increasingly critical role in medical device manufacturing. For original equipment manufacturers (OEMs) that choose to outsource manufacturing operations, a successful contract manufacturing organization (CMO) partnership can help ensure that a new product will reach the market sooner, achieve financial success, and deliver high-quality innovation to end users.
Polyamide Type 6-6, Plastic Moldings and ExtrusionsAMS3617F (Current)6/13/2019
This specification covers one type of Polyamide Type 6-6 (nylon) thermoplastic resin in the form of moldings and extrusions.
AMS P Polymeric Materials Committee
Model Gives Robots a Better Feel for Object ManipulationTBMG-345766/1/2019
A new learning system improves a robot’s ability to mold materials into target shapes and make predictions about interacting with solid objects and liquids. The system, known as a learning-based particle simulator, could give industrial robots a more refined touch and may have applications in personal robotics.
Why Reel-to-Reel Molding Might Be Right for Medical ComponentsTBMG-344485/1/2019
Reel-to-reel insert molding can prove a more efficient process for design engineers when it comes to lowering assembly costs. The process is best suited for products that require dimensional stability and need to function in harsh environments, such as drug-delivery device parts and components.
Digital Manufacturing Helps Medtech Firm's Goal to Improve Patient OutcomesTBMG-342614/1/2019
As often happens in the medical industry, innovative ideas hatched in university research settings spawn innovative companies, which create innovative products. A case in point: HemoSonics. The Charlottesville, VA-based medical device company was started in 2005 by two professors and a post-doctoral research student at the University of Virginia School of Medicine's Bio-Medical Engineering program — Bill Walker, Mike Lawrence, and Francesco Viola, respectively. The trio identified a method for measuring the stiffness of blood clots by using ultrasound imaging technology and created a system built around that technology aimed to improve patient outcomes and reduce costs.
Interactive Software Simplifies Complex Mold DesignTBMG-336812/1/2019
Molding is a popular method for the mass production of objects. Essentially, two (or more) mold pieces are fit together, leaving the shape of the desired object as a hole. During fabrication, a fluid is introduced into this cavity and is allowed to harden. Once the fluid has solidified, the pieces of the mold are removed, leaving behind the molded object. While the process is fairly simple, creating the mold to produce an object is extremely difficult, and a multitude of considerations go into its creation.
Nickel Alloy, Corrosion and Heat-Resistant, 47.5Ni - 22Cr - 1.5Co - 9.0Mo - 0.60W - 18.5Fe Powder for General Applications including Metal Injection Molding and Additive Manufacturing without Special Powder Manufacturing ControlsAMS5924 (Current)1/14/2019
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
Nickel Alloy, Corrosion and Heat-Resistant, 47.5Ni - 22Cr - 1.5Co - 9.0Mo - 0.60W - 18.5Fe Powder for General Applications including Metal Injection Molding and Additive Manufacturing without Special Powder Manufacturing ControlsAMS5924-TEST-REC (Historical)1/14/2019
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 SiliconeTBMG-335601/1/2019
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, & PolicyE-JOURNAL-131/1/2019
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 PressTBMG-3336312/1/2018
Beckwood Press Company Fenton, MO 636-343-4100
Metal Tubing Offers Flexibility for Disposable DevicesTBMG-3325811/1/2018
Traditional handheld surgical tools continue to provide benefits where surgeons need instruments to be more rigid and have strong holding power to withstand complex procedures. The majority of these small handheld devices include tubing technology. Those made with metal can be formed to meet specific needs. Base tubing can be created from drawn tubing or from flat sheets of metal in a patented technique known as rolled-tube technology, which is ideal for creating high volume disposable devices.
MIM and 3D Printing: Precision Cleaning and Product Finishing of Medical DevicesTBMG-3325111/1/2018
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 MoldingTBMG-3308810/1/2018
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 DevicesTBMG-3308910/1/2018
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.
Tests Prove Immersion Method of Production of Implantable Devices is EffectiveTBMG-328189/1/2018
Healthcare-associated infections (HAI) are a major, yet often preventable threat to patient safety, and they can have a significant impact on the survival rate of patients who undergo procedures and treatments. In particular, catheter-associated infections are difficult to prevent, even when products are made of silicone, due to their inherent positioning both inside and outside of the body.
Material Advances for Additive Manufacturing of Bioresorbable Polymeric Medical DevicesTBMG-289185/1/2018
Although we’ve heard a lot about the promise of additive manufacturing (AM), the reality is that this technology has not yet caused a revolution in medical device manufacturing. But there is a slowly forming niche of AM medical devices that relies on the combination of advanced design, processing, and innovative materials to create customized solutions.
Two-Component Molding Can Solve Medical Design Challenges and Reduce CostsTBMG-289255/1/2018
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 Study05-11-02-00114/7/2018
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 BoundariesTBMG-285203/1/2018
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.
Vote for Medical Design Briefs Annual Readers' Choice AwardsTBMG-2807012/7/2017
Each month, the editors of Medical Design Briefs choose a Product of the Month that has exceptional technical merit and practical value for MDB’s design engineering readers.
Vacuum System Powers Modular Soft RobotTBMG-2794012/1/2017
Researchers at the Ecole Polytechnique Federale de Lausanne (EPFL) have created the first functional robot powered entirely by vacuum. It is made of soft building blocks that move by having air sucked out of them. The robot can be reconfigured to perform different tasks, like climbing vertical walls and grabbing objects.
Optimizing Performance and Value of Medical Devices with the Right Plastic Processing TechnologyTBMG-2797612/1/2017
Application of Six Sigma Methodology to Improve Product Quality in Injection Molded Parts at Supplier End in Motorcycle Industry2017-01-50119/29/2017
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, CATBMG-274078/21/2017
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 GratingTBMG-272918/1/2017
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
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