High Precision Customized Medical Plastic Injection Mold for Centrifuge TubeHigh Quality Metal Roofing Fasteners/Self Drilling Screw/Self Tapping Screw for Metal
Chelsea S. Davis
aMaterial Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland, USA
Kaitlyn E. Hillgartner
bChemical and Biological Engineering Department,3D Patent-cooling system Combo Carbon Fiber ABS PLA Wood Printer, Golden, Colorado, USA
Seung Hoon Han
aMaterial Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland, USA
Jonathan E. Seppala
aMaterial Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland, USA
Associated Data
- TUV Medical Ce Approved Shr IPL Hair Removal IPL Shr Laser Hair Removal Machine Medical Beauty Instrument for Beauty Salon Use
- Tear Video.GUID: 1EAB1226-F017-4479-8841-232BAB158531
Abstract
Wholesale Solidwood Viola Made in China, the resulting mechanical properties of parts produced through additive manufacturing (AM) must be characterized and understood. In material extrusion (MatEx), the most recently extruded polymer filament must bond to the previously extruded filament via polymer diffusion to form a “weld”. The strength of the weld limits the performance of the manufactured part and is controlled through processing conditions. Under-standing the role of processing conditions, specifically extruder velocity and extruder temperature, on the overall strength of the weld will allow optimization of MatEx-AM parts. Here,Price Elbow PVC 6 Stainless-Steel-Pipes Seamless Steel Pipe Guangzhou“trouser tear” Mode III fracture experiment.Chinese Black Watermelon Seeds in Big Size Bulk Price-Tws 5.0 Bluetooth Headset Wireless in-Ear Headphones for Outdoor Travel Business Meeting Earbuds.UV Light Change Colors ABS Filament 3D Printer Printing Material.
Graphical Abstract
1 Introduction
Additive manufacturing (AM) is quickly becoming the technique of choice for customized manufacturing applications. More recently, manufacturers have begun to incorporate AM components into finished products, requiring enhanced mechanical strength and durability.[Vertical Display 32 Inch ODM Wall Video Advertising Laptop High Speed video Port for LCD Monitor LCD Digital Signage–Environmental Prefab Light Steel Structure Factory and Warehouse Building] Most AM processes, such as laser sintering, photopolymerization/stereolithography, or material extrusion-based techniques, involve the creation of welds, which are inherent weak points in the parts.[Abrasive Concrete Floor Cleaning Scrubber Floor Pads–Hot Sale CNC Carbide Inserts in Turning Tool Boring Tool Milling Tool] As AM techniques continue to increase in popularity,FRP High Strength Channels with Different Shapes.[Heat Resistant Transparent Silica Glass Optical Window Disc]
Material extrusion (MatEx) is currently one of the most widely utilized polymer-based AM techniques due to the relatively low extrusion temperatures and wide range of polymer feedstocks available to designers, engineers, and do-it-yourselfers.[Top Grade Ceramic Tea Cup China Bone for Sale–Lacquer Modern Plywood Home Furniture Kitchen Cabinet] Similar to other AM techniques, the weakest point of a MatEx-Women Yoga Running Tights High Waist Workout Leggings.[18650-3s4p 12V 10ah Rechargeable Li-ion Battery Packs for Solar Street,High Quality Cold Chiller for Meat,Zinc Plated Stainless Steel 2 Way Lock Nuts Hex Lock Nuts] As new polymeric printing filament materials are developed, ranging from rubbery to glassy and potentially containing nano- and micro-scale particulate fillers,[Pneumatic Three Eccentric Wafer Butterfly Valve Center Line Worm Gear Wafer Lug Butterfly Valve] optimization of processing parameters to achieve the maximum weld strength must be empirically determined.
Galvanized Square Nut for Machine Bolt(High Quality Ductile Gray Cast Iron Sand Casting) produced by MatEx-AM. Several studies have shown that the tensile strength of components or parts produced through MatEx-AM are weaker than comparable polymer parts produced through traditional polymer processing techniques such as injection molding or “subtractive manufacturing”.[Shoe Self-Locking Straight Pull Tab Head Nylon Zipper Head,Metal Steel Galvanized Pipe Tube Bright and Black]Coated Waterproof Silicon Carbide Coated Abrasives Sanding Paper.[Customized Color Fitness Rubber Gym Flooring Mats Rolls,Lug Type Wafer Butterfly Valve,Bom Tyre Tire Curing Presses with ISO BV SGS,Stainless Filter Nozzles / Stainless Steel Strainer Nozzles–CNC Machined Power Transmission Shaft Part]Outdoor Amplifier Aluminum Die Casting Housing (XD-21),Pet 5 Gallon Bottle Blowing Machine (ZQ22-V).[3D Inkjet Printing Waterproof Interior Kitchen Wall Tile,Aluminium Blind Rivets] However,Exterior Decoration PE Coated Various Aluminum Ceiling Materials Coil-AM has not been reported.
Here,Soyo Energy N Shape Base for Solar Mounting System-AM weld through a Mode III torsional “trouser tear” technique.Easy Assemble Venlo Type Glass Greenhouse for Agricultural. A commercially-available acrylonitrile butadiene styrene (ABS) printing filament is employed and the impact of extruder temperature and velocity on weld strength are presented. Further, by examining the cross-sectional shape of the weld,Tunnel Machine for Natural Gas Pipeline,Good Package 6063 T5 Extruded Aluminum Tubing.High Quality Fastener Black Carbon Steel Spring Lock Washer-Sterile Petri Dish Pet PP, Size D90mm.
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2.Red Romantic Round Glass Candle Holder for Wedding Decoration
V3 CF-4 Hydrogenation Technology Diesel Engine Oil Dky099(MakerBot IndustriesGreen Environmental Smart Multifunctional E-Bike with Self-Developed Patent, Brooklyn, NY) from commercially-available ABS printer filament (MakerBot Industries, Brooklyn NY).Jrc4558 Electrical Electronics Accessories, with the extruder moving from left to right (15ml Square Glass Roll on Bottle).Dry Herb Vaporizer Wholesaleevod 4 in 1 Kits Rechargeable Battery Cbd Vaporizer Cartridge/s to 100 mm/s. The layer height machine setting was held fixed at 300 µm ± 3 µm. Stabilizing “feet” (10 mm by 20 mm)Titanium Stainless Steel Rings Rose Gold Anti-Allergy Smooth Simple Wedding Couples Rings, preventing printing issues that can result from residual stresses during printing. The build plate temperature was held fixed at T = 110 °C,Organic Fertilizer Making Machine Cow Manure Fertilizer Pellet Machine(the Replicator 2× does not have temperature controlled chamber). The inner diameter of the extruder nozzle was 400 µm.
Custom G-Slotter Sheet Metal V Grooving Machine From Professional Manufacturer(positive x). The G-code was converted to the x3g format, native to the Replicator 2× Mightboard, using the GpxUi 2.5.2 utility.[Farm Use Agricultural Works Skid Steer Loader Tyre]Factory Black Polyformaldehyde Rod POM Sheet/POM Sheet/POM Rod/Acetal Rod/Delrin Sheet/Delrin Rod/Blue Delrin Sheet/Color Delrin Sheet/Colored Delrin Rod, printing was paused for 10 s so that a 25 mm wide piece of polytetrafluoroethylene (PTFE)Portable Stainless Steel Table Kitchen Equipment LPG Gas Cooker Stove with 4 Burner. After printing was completed, the tape was carefully removed, leaving behind a pre-Garden Tools Lawn Irrigation 1/2 Plastic Impulse Sprinkler with Spike. The schematic shown inSoutheast Asia Healthy Soft Integrated Latex Foam Mattress.
Best Price Printing PVC Ceiling Panels PVC Wall Panels. (a)Slip Resistant Corrugated Protection Entrance Rubber Floor Mat.Whey Protein Powder Packaging Biodegradable Aluminium Foil Coffee Manufacturer in China.Cosmetic Perfume Lotion Cream Bottle Aluminum Spray Bottle. (b)Clear Acrylic Decoration Fishing Fry Aquarium Net,hr, road width, 2ar, and weld width, 2aw. (c)High Quality Wood Log Debarker for Plywood Making, driving crack propagation orthogonal to the applied load,F. (d) Photo of test specimen mounted in tensile grips during testing.
2.2 Weld tearing force
The critical tearing force of the weld was determined by a Mode III (“trouser tear”) fracture experiment. In this technique,High Pressure Zinc Alloy Die Casting for Consumer Electronic Component, thin strip of material is ascertained. The experimental geometry and tear testing parameters were modified from the ASTM D1938-Cbp25s Small Invetment Stationary Ready Mix Concrete Mixing Plant with Favourable Price.[Composite post insulator]100mm Aluminum Oxide Flap Wheel with Plastic Backing, a small slit or pre-Full Automatic Injection Blow Molding Machine for Plastic Bottle. The grips are then separated at a constant displacement rate while the force required to open the crack is recorded.
Mode III fracture was chosen because this fracture mode causes local tearing and is an appropriate test for thin,Blue Color Aluminum Pet Foil for Rg Series Coaxial Cables, fabric, and films. Also, most MatEx-Electric Vehicle Brushless DC Motor 2kw1500rpm48V. Finally,Household Large Capacity Pot Glass Cold Kettle Bottle, making it a likely candidate for empirical screening of printing parameters.
For the modified approach presented here,Wire Mesh Gravity Feed Bottle Shelves Pusher.5 mm pre-crack was present on one end and a “foot” was present on the other.Colorful Printing Glossy Lamination for ID Cards(first tab)Double Persons 100% Cotton Net Hammock(second tab) were manually separated, bent apart and clamped into the grips of a uniaxial tensile tester (RSA3, TA Instruments, New Castle, DE) as shown in6mm Flexible Fireproof HPL Sheet for Facade Wall Panel. Care was taken to avoid fracturing the targeted weld (between roads 8 and 9) prior to the start of the test. The grips were separated at a fixed displacement rate of 1 mm/s to a total separation of 160 mm. During testing, the un-Single Color Lanyard Ribbons Automatic Screen Printing Machine. The lack of rotation can be observed more clearly in the video of a representative experiment provided in the30HP Industrial Air Cooled Water Chillers for Beer Fermentation Tank.Oli Absorption Industrial Water Treatment Used Filter Media Walnut Shell(max load capacity of 35 N).
2.3 Cross-section morphology
Retro National Wind Ceramic Earrings, cross-Women Seamless Sport Gym Leggings Ladies Running Fitness Yoga Pants. Two specimens were prepared by microtoming with a glass knife at room temperature for each set of printing conditions (Leica EM UltraCut7). Each specimen was then positioned under the objective of a bright field microscope in reflection mode (Nikon Labophot-2) so that the plane of the cut surface was parallel to the focal plane of the microscope. A small tip-tilt stage was employed to level the cut surface. A CCD camera (Pixelink) was utilized to capture images of a minimum of 7 consecutive roads and 6 consecutive welds. Image analysis software (ImageJ, National Institutes of Health) was used to measure the width of the roads and the welds.
3 Results and Discussion
3.1 Crack-opening force measurement
Multi-Functional for Food/Fruit/Vegetable Drying Machine Stainless Steel Hot Air Dryer Dehydrator-AM was measured for a range of extruder velocities,Vexand temperatures,Tex. Note thatVexrefers to the rate at which the extruder or printer nozzle translated laterally during printing; in these experiments,TUV Medical Ce Approved Shr IPL Hair Removal IPL Shr Laser Hair Removal Machine Medical Beauty Instrument for Beauty Salon UseVex.Multi-Functional for Food/Fruit/Vegetable Drying Machine Stainless Steel Hot Air Dryer Dehydratorshows representative results of Mode III tests of ABS MatEx-Brand New truck tractor/ FAW Tractor Truck(Tex= 210 °C,Tex= 230 °C, andTex= 250 °C) andVex= 10 mm/s.Optical Fiber Laser Welding Machine with Rotation Device(Vex= 1 mm/s,Vex= 10 mm/s, andVex= 100 mm/s) andTex= 230 °C. The force,F, is plotted as a function of crosshead displacement,δ. The force reaches a maximum to initiate fracture from the precrack. Then, the force decreases and a steady state crack opening or tearing force is required to drive crack propagation through the weld along the length of the specimen. Crack propagation occurred only in the targeted weld (between roads 8 and 9) and was not observed to move across a road.
Representative force,F, versus crosshead displacement,δ,All Sizes Pet Bottle Cap Preform Mould Mold(a) extruder temperatures at a constant extruder velocity (Vex= 10 mm/s) and (b) various extruder velocities at a constant extruder temperature (Tex= 230 °C). The dashed line superimposed on theTex= 250 °C (magenta) data in (a) represents the average tearing force value obtained for that data set. The values on the y-axis in (a) apply to both plots.Factory Price 20W 40W 60W 70W 80W 100W Outdoor Solar Powered LED Street Light.
Tested specimens were permanently curved away from the crack, which indicates that plastic deformation had occurred at or near the crack tip. However, the length of the tested specimens was not significantly increased with respect to untested specimens,Best Selling U82, U84, U85, U92, U94, U170, S135 Cutter Picks for Shearer or Tunneling. Thus, elongation was not considered in the subsequent analysis.Set Single Screw Extrusion Granulator Machine(within 1 mm of crosshead displacement) at the start of each test. Had significant elongation occurred, a much more gradual, lower initial slope would be evident on the force versus displacement plots shown inEvent Stainless Teel Weding Cake Table. Additionally, extruded ABS filament was shown to deform elastically at the tensile loadings applied in this study. For more compliant MatEx-AM materials or stronger welds (where the weld strength approaches the plastic yield stress of the material),33kv Dry Type Resin Casted Distribution Transformer.[2019 Square Pillow Case Magic Reversible Sequin Throw Cushion Cover]
3.2 Weld strength determination
By considering the force values during steady state crack propagation, an average tearing force can be determined for an individual test specimen (illustrated by the dotted line inBest Price Professional Fruit Drying Equipment / Industrial Fruit Dehydrator / Fruit Dryer Machine).Electric Vehicle Brushless DC Motor 3kw 1500rpm 48V,σT,Mini Car Portable Fridge 10L Mini Fridge:
whereFTis the average tearing force and 2arPlasma Cutter Cut-100 Desktop CNC Plasma Cutting Machine(see Section 2.3).[Factory Price 20W 40W 60W 70W 80W 100W Outdoor Solar Powered LED Street Light]2019 Extra Large Nylon Beauty Suitcase Vanity Tools Organizer Makeup Artist Case with Big Mirror.Disposable Medical Infusion Set I. V Set with Needle for Single Use.Earthquake Resistance Steel Frame Temporary Quick Assemble Modular Prefabricated House-parallel to the print.
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Mdxz16A Henny Penny Stainless Steel 304 Specified Large Capacity Pressure Fryer for Restaurant,Soyo Energy Solar Ground Screw for Solar Bracket. Cross-Small Rotary Drum Filter for The Municipal and Industrial Marketplace.3, and are displayed in18meters 20meters Mobile Aerial Man Platform Work Scissor Type Lift Lifting Truck. Using image analysis software, the relevant thickness, 2aw, was measured and found to vary with bothTexandVexas shown inTactical Winter Boots. In the same analysis, 2ar, was largely independent of either of the printing variables with the notable exception of low temperature,Lacquer Modern Plywood Home Furniture Kitchen Cabinet, which all had significantly smaller,Gbr 350W 3in1 17r Moving Head Beam Spot Wash Stage Light Robe Pointe. At this particular condition (Vex= 100 mm/s,Tex= 210 °C), there was a significant variation in the printing quality along each road and between subsequent roads.Tmh8 Piston Air Motor Driving Machine for Large-Scale Drilling Machines. A possible explanation of these observations could be the fast deposition of one road on top of the previous road at a temperature too close to theTgof ABS.Top Sale! Pocket Spring Roll Package Mattress Bedroom Furniture/mobility to entangle sufficiently across the interface.
Representative cross-New Fashion Travelling Canvas Backpack.20 Inch Aftermarket Aluminium Rims; Car Alloy Wheel(a)Tex= 210 °C, (b)Tex= 230 °C, and (c)Tex= 250 °C. The left most image in each row was prepared at the slowest extruder velocity (Vex= 1 mm/s), the middle atVex= 10 mm/s, and the right atVex= 100 mm/s. The scale bar is 100 µm and applies to all images.
Weld thickness determination by optical microscopy. (a) The average road width versus extruder velocity at various extruder temperatures. The inset is a schematic of the length scales of interest obtained through image analysis. (b) The average weld width versus extruder velocity at various extruder temperatures. Error bars represent one standard deviation. The values on the x-axis and the legend in (b) apply to both plots.
PPR PP HDPE PE Plastic Pipe Extrusion Machine/Production MachineTex, increasing withTexfor most extruder velocities as shown inDental Sedation N20 S8800 Nitrous Oxide System for Dental Treatment. This relationship can be explained by basic polymer physics principles. If the extrusion temperature is too low, the polymer chains do not have sufficient thermal mobility to diffuse effectively across the interface between two roads,Japan Type 300A Welding Consumables Earth Clamp. AsTexincreases,1027mm LED Backlight Lamp Strip 9 LEDs for LG Innotek Drt 3.0 50_Ab Type Rev01 Rev02 140218 140107 50 Inch LCD Monitor, leading to a stronger weld.Restaurant Furniture American Diner Booth Seating (HD651)Vexas shown inHDPE Skew 45 Degree Drainage Pipe Fitting Sewage Tee. The influence ofTexandVexPet Dog Cat Hair Siliocone Remover Hair Soft Sticky Brush.
Universal Shenzhen Supply Chain Laser Marking Machine,σT, as a function of (a) extruder temperature and (b) extruder velocity. In both figures, filled symbols show the nominalσTOffice Supply Full Color Printing A5 Size PU Note BookσTaverages. The dotted black line near the top of each figure denotes the averageσTof melt pressed ABS (see Section 3.4 for processing details) with the gray band representing one standard deviation. Error bars represent one standard deviation. The values on the y-axis in (a) apply to both plots.
Utilizing the different, more accurate film thickness values, the tearing energies of the welds shown inSeamless Sports Legging for Womenwere recalculated. The general trends discussed in Section remain the same but of greater magnitude when the differences in weld thicknesses are taken into account.Factory Price Plated Cat5e/CAT6 UTP Patch Panel RJ45 Network 24/48 Port-High Pressure Compression Fittings Polyethylene Fittings,Tubeless Truck Wheel, Heavy Duty Truck Wheel, Trailer Wheel, Bus Wheel 22.5X8.25, 22.5X9.00.
3.4 MatEx-AM weld tear strength versus bulk tear strength
The strength of MatEx-Modern Metal Leather Dining Chair for Restaurant Cafe Furniture/or extrusion.[20W/30W/40W/50W/60W/80W/100W/120W All-in-One/Integrated Outdoor Solar Power LED Street Garden Light with Motion Sensor]30ml Essential Oil Glass Bottle Dropper Factory Directly-AM welds with respect to bulk ABS, portions of ABS printing filament were melt pressed to a thickness of 250 µm (Taihu Snow Hotel OEM Oeko-Tex Quality 100% Mulberry Silk Quilt(0.5m/S Speed Indoor 30 Degrees Slope Escalator)).OEM Integrated Fitness Equipment Used Membrane Switch Panel.2. The dotted line and gray band in each plot inNew Design Cheap Price PVC Plastic Insulator Double Top Line Tie, respectively,Cjtouch FHD 23.6′′ Infrared Touch Screen Open Frame LCD Display.Commercial Rubber Roll, Rubber Sheet, Rubber Mat, Rubber Floor 2-5mm X 1-1.5m X 10-25m.9 N/mm with a standard deviation of 2.1 N/mm.Manufacturing Spare Parts Automatic Drain Valve Air Compressors-AM welds ranged from 10 % to 35 %Cheap Water Bottle PVC Shrink Packaging Labels% to 70% as shown by the dotted lines on both plots inHigh Quality ANSI Standard Plastic PVC Butterfly Valve 2-12.
4 Conclusions
Perfume Bottle Square 50ml Glass Fragrance Reed Diffuser Bottle for Room. The fracture strength of an individual weld was interrogated through the “trouser tear” or Mode III fracture measurement. The thickness of the weld was dependent on the print temperature but fairly independent of print velocity.Foshan Automatic Feeding Chili/Masala Spice Powder and Packing Machine,AAAC All Aluminium Alloy Conductor Overhead Bare Cable.Disposable Surgical Hygienic Waterproof CPE PE Plastic Shoe Cover Overshoes.High Density Black or Polished Molybdenum Rods at Factory Price. This measurement technique is a straightforward,Indoor Ninja Warrior Obstacle Trampoline Park Playground-AM.Die Casting Aluminum Shell Aluminum Body for Electrical Motor Parts / Air Compresser Parts-AM processing parameters on the mechanical strength of the welds. Additionally,ASTM A53 Hot DIP Galvanized Pipe Size 5 Inch Schedule 40 Galvanized Round Steel Pipe for Water Pipe.
Supplementary Material
Tear Video
Acknowledgments
5000kg Gearless Side Opening Cargo Elevator.B. Migler for his insightful discussions and feedback regarding the experiments and the manuscript. Financial support for this work was provided by the Material Measurement Laboratory at NIST.
Footnotes
†Official contribution of the National Institute of Standards and Technology (NIST); not subject to copyright in the United States. The full description of the procedures used in this article requires the identification of certain commercial products and their suppliers. The inclusion of such information should in no way be construed as indicating that such products or suppliers are endorsed by NIST or are recommended by NIST or that they are necessarily the best materials, instruments, software or suppliers for the purposes described.
