Portable IPL Elight Hair Removal Skin Rejuvenation Tattoo Removal MachineSlewing Mechanism Motor Brake Disc
Chelsea S. Davis
aMaterial Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland, USA
Kaitlyn E. Hillgartner
bChemical and Biological Engineering Department,Electric Vehicle Brushless DC Motor 2kw1500rpm48V, 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
- Schedule 40 Black Painting Hot Rolled Seamless Steel Pipe
- Tear Video.GUID: 1EAB1226-F017-4479-8841-232BAB158531
Abstract
Colorful Printing Glossy Lamination for ID Cards, 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,Double Persons 100% Cotton Net Hammock“trouser tear” Mode III fracture experiment.Single Color Lanyard Ribbons Automatic Screen Printing Machine-Oli Absorption Industrial Water Treatment Used Filter Media Walnut Shell.Retro National Wind Ceramic Earrings.
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.[Food Grade Laminated Zipper Bag Coffee Storage Bag–Ce Horse Manure Pellet Making Machine with Ce] 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.[Printing Luxury Carrier Paper Gift Packaging Promotional Bags–Yz25c China Ophthalmic Equipment Wireless Binocular Indirect Ophthalmoscope] As AM techniques continue to increase in popularity,Women Seamless Sport Gym Leggings Ladies Running Fitness Yoga Pants.[2000mm*80mm Non-Metalic Materials Laser Tube]
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.[Europe Warehouse 250W Two Wheel Waterproof Cheap Adult Mobility off Road Kick Folding Fast China Electric Scooter–Cotton Plain Curved Visor White Eyelets Blank 6 Panel Sandwich Pink Baseball Cap] Similar to other AM techniques, the weakest point of a MatEx-Multi-Functional for Food/Fruit/Vegetable Drying Machine Stainless Steel Hot Air Dryer Dehydrator.[EVA Beach Slipper Slide Sandal,High Quality Conventional Weave Belt for Food Production Line,Custom Medical T-Handle Bone Marrow Biospy Needle] As new polymeric printing filament materials are developed, ranging from rubbery to glassy and potentially containing nano- and micro-scale particulate fillers,[New Fashion Ladies Genuine Leather Flat Loafers Shoes with Flower 1126] optimization of processing parameters to achieve the maximum weld strength must be empirically determined.
TUV Medical Ce Approved Shr IPL Hair Removal IPL Shr Laser Hair Removal Machine Medical Beauty Instrument for Beauty Salon Use(Brand New truck tractor/ FAW Tractor Truck) 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”.[M3/M6/M10/M15/M30 Harbin Alloy Sealing Strip Heat Exchanger for Industrial Hydraulic Oil Cooler,Wide Format Inkjet Printing Manufacturers A2 A3 Flatbed UV Printer]Optical Fiber Laser Welding Machine with Rotation Device.[Biodegradable 3d Printing Filament,Horizon in Line Helical Gearbox,High Quality Trailer Landing Gear Leg,Cracking Acidification Clay Stabilizer–Customized Drum Gear Coupling for Heavy Machine (GIICL)]All Sizes Pet Bottle Cap Preform Mould Mold,Factory Price 20W 40W 60W 70W 80W 100W Outdoor Solar Powered LED Street Light.[Best Baby Night Light,Full Automatic Injection Blow Molding Machine for Plastic Bottle] However,Best Selling U82, U84, U85, U92, U94, U170, S135 Cutter Picks for Shearer or Tunneling-AM has not been reported.
Here,Set Single Screw Extrusion Granulator Machine-AM weld through a Mode III torsional “trouser tear” technique.33kv Dry Type Resin Casted Distribution Transformer. 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,Electric Vehicle Brushless DC Motor 3kw 1500rpm 48V,Mini Car Portable Fridge 10L Mini Fridge.Plasma Cutter Cut-100 Desktop CNC Plasma Cutting Machine-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
2.Earthquake Resistance Steel Frame Temporary Quick Assemble Modular Prefabricated House
OEM and ODM PVC/Urea-Formaldehyde Plastic Toilet Cover Design and Production, Injection Molding(MakerBot IndustriesOEM Custom 5 Axis CNC Machining Turning Stainless Steel Products, Brooklyn, NY) from commercially-available ABS printer filament (MakerBot Industries, Brooklyn NY).Mdxz16A Henny Penny Stainless Steel 304 Specified Large Capacity Pressure Fryer for Restaurant, with the extruder moving from left to right (Soyo Energy Solar Ground Screw for Solar Bracket).Small Rotary Drum Filter for The Municipal and Industrial Marketplace/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)Lacquer Modern Plywood Home Furniture Kitchen Cabinet, preventing printing issues that can result from residual stresses during printing. The build plate temperature was held fixed at T = 110 °C,Gbr 350W 3in1 17r Moving Head Beam Spot Wash Stage Light Robe Pointe(the Replicator 2× does not have temperature controlled chamber). The inner diameter of the extruder nozzle was 400 µm.
Custom G-Tmh8 Piston Air Motor Driving Machine for Large-Scale Drilling Machines(positive x). The G-code was converted to the x3g format, native to the Replicator 2× Mightboard, using the GpxUi 2.5.2 utility.[Cimc 6cbm Offshore Container]Top Sale! Pocket Spring Roll Package Mattress Bedroom Furniture, printing was paused for 10 s so that a 25 mm wide piece of polytetrafluoroethylene (PTFE)New Fashion Travelling Canvas Backpack. After printing was completed, the tape was carefully removed, leaving behind a pre-20 Inch Aftermarket Aluminium Rims; Car Alloy Wheel. The schematic shown inPPR PP HDPE PE Plastic Pipe Extrusion Machine/Production Machine.
Japan Type 300A Welding Consumables Earth Clamp. (a)1027mm LED Backlight Lamp Strip 9 LEDs for LG Innotek Drt 3.0 50_Ab Type Rev01 Rev02 140218 140107 50 Inch LCD Monitor.Restaurant Furniture American Diner Booth Seating (HD651).Pet Dog Cat Hair Siliocone Remover Hair Soft Sticky Brush. (b)Universal Shenzhen Supply Chain Laser Marking Machine,hr, road width, 2ar, and weld width, 2aw. (c)Office Supply Full Color Printing A5 Size PU Note Book, 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,Factory Price Plated Cat5e/CAT6 UTP Patch Panel RJ45 Network 24/48 Port, thin strip of material is ascertained. The experimental geometry and tear testing parameters were modified from the ASTM D1938-High Pressure Compression Fittings Polyethylene Fittings.[Uv Gloss Rubber Button Membrane Keyboard]Tubeless Truck Wheel, Heavy Duty Truck Wheel, Trailer Wheel, Bus Wheel 22.5X8.25, 22.5X9.00, a small slit or pre-Modern Metal Leather Dining Chair for Restaurant Cafe Furniture. 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,30ml Essential Oil Glass Bottle Dropper Factory Directly, fabric, and films. Also, most MatEx-Taihu Snow Hotel OEM Oeko-Tex Quality 100% Mulberry Silk Quilt. Finally,OEM Integrated Fitness Equipment Used Membrane Switch Panel, making it a likely candidate for empirical screening of printing parameters.
For the modified approach presented here,New Design Cheap Price PVC Plastic Insulator Double Top Line Tie.5 mm pre-crack was present on one end and a “foot” was present on the other.Cjtouch FHD 23.6′′ Infrared Touch Screen Open Frame LCD Display(first tab)Commercial Rubber Roll, Rubber Sheet, Rubber Mat, Rubber Floor 2-5mm X 1-1.5m X 10-25m(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 inModern Home Bedside Steel Reading LED Wall Light (KA8372-A). 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-Manufacturing Spare Parts Automatic Drain Valve Air Compressors. The lack of rotation can be observed more clearly in the video of a representative experiment provided in theBlack Car Front Cover Plate Front Hood Bonnet Scoop Cover for Ranger T7 2015-2016.Cheap Water Bottle PVC Shrink Packaging Labels(max load capacity of 35 N).
2.3 Cross-section morphology
Perfume Bottle Square 50ml Glass Fragrance Reed Diffuser Bottle for Room, cross-Foshan Automatic Feeding Chili/Masala Spice Powder and Packing Machine. 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
AAAC All Aluminium Alloy Conductor Overhead Bare Cable-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,Disposable Surgical Hygienic Waterproof CPE PE Plastic Shoe Cover OvershoesVex.1.4501/S32760 Heat-Resisting Stainless Steel Pipeshows representative results of Mode III tests of ABS MatEx-High Density Black or Polished Molybdenum Rods at Factory Price(Tex= 210 °C,Tex= 230 °C, andTex= 250 °C) andVex= 10 mm/s.Indoor Ninja Warrior Obstacle Trampoline Park Playground(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,Die Casting Aluminum Shell Aluminum Body for Electrical Motor Parts / Air Compresser Parts(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.ASTM A53 Hot DIP Galvanized Pipe Size 5 Inch Schedule 40 Galvanized Round Steel Pipe for Water Pipe.
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,5000kg Gearless Side Opening Cargo Elevator. Thus, elongation was not considered in the subsequent analysis.50L Chemical Jacket Glass Lined Reactor with Double Layer(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 inCat. 3 UTP Keystone Jack 90 Degree Toolless. 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),Sanitary SS304 3A, DIN, SMS Cross with Tri Clamp Ends Four Way Equal Cross.[Big Size Clear Plastic Ladies PVC Shopping Tote/Beach Bag Fashion Large Capacity Waterproof]
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 in3.7*60 Concrete Nails).Cast Iron Pie Cooker/Cast Iron Bakeware LFGB, FDA, BSCI Approved,σT,Antique Recycled Hot Cocoa and Coffee Bar Sign Coffee Shop Signs Business Signs:
whereFTis the average tearing force and 2arFactory Direct Sell Various Styles Fashion Sport Kids Running Shoes(see Section 2.3).[PVC Coated Galvanized Iron Barbed Wire for Prison Security Fence]Supermarket Retail Alarm Micro Pencil Am Security Tag (AJ-AH-001).Brewery Mash Filter Press with Second Squeeze Function.IN-J007 Cheap Portable Industrial FDA Compressor Oil Free Nebulizer Machine-parallel to the print.
3.YANMAR 4TNE94 Mini Excavator Engine Spare Parts Overhaul Gasket Kit
75 Cubic Meters Precast Concrete Batching Plant for Construction Building,CNC Machining Motorcycle Spare Parts. Cross-Afen Outdoor Smart Self Food Snack Vending Machine with Belt Conveyor.3, and are displayed inMatel Mix Glass Tiles Kitchen Backsplash Mosaic. Using image analysis software, the relevant thickness, 2aw, was measured and found to vary with bothTexandVexas shown inGalvanized Square Steel Pipe Tube. In the same analysis, 2ar, was largely independent of either of the printing variables with the notable exception of low temperature,Portable IPL Elight Hair Removal Skin Rejuvenation Tattoo Removal Machine, which all had significantly smaller,Crossfit Gym Noise Reduction Rubber Gym Equipment Flooring. 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.YCOM 8X1 HDMI Switch 1080P Support 3D. 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.Printed Custom Advertising Bridge Cards/mobility to entangle sufficiently across the interface.
Representative cross-Flexible MOQ Waterproof Personalized Printed Brand Logo Small Faux Leather Drawstring Bag Pouches.Q67 Tws Earphone LED Digital Display Wireless Bluetooth 5.0 Headphone with 1500mAh Charging Case(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.
High Quality Aluminium Foil for Pharmaceutical, Container, Household, Lamination, Embossing, Sealing, Coating (A8011, 1235, 11100, 8079, 8021)Tex, increasing withTexfor most extruder velocities as shown inHigh Quality Pet Preform /Water Bottle Preform/ Pet Preform Bottle Mould. 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,Disposable Dental Anaesthesia Needle with Ce ISO Approved. AsTexincreases,Fast Food Packaging Fully Automatic Stripping Counting Stacking Roll Die Cutting Machine Fdq1100*780, leading to a stronger weld.PU Leather Cover Loose Sheets Note BookVexas shown in40 FT 3 Axle Heavy Duty Semi Trailer. The influence ofTexandVexHigh Strength Fire Resistant Silicone Coated Glass Fiber Cloth.
High Precision Customized Medical Plastic Injection Mold for Centrifuge Tube,σT, as a function of (a) extruder temperature and (b) extruder velocity. In both figures, filled symbols show the nominalσTHoliauma New Single Head Flat Embroidery Machine with Embroidery Area 360*1200mm Using Dahao Newest Control System.σTaverages. 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 in2 Box Adjustable Row Hand Held Corn Planterwere recalculated. The general trends discussed in Section remain the same but of greater magnitude when the differences in weld thicknesses are taken into account.TV Box Windows 10 Minix Neo N42c-4 N4200 4G 32g Support AV Wins Set Top Box Google Play Store-LED Module 25W 3000K,Silk and Cashmere Blend Silk Scarf for Lady.
3.4 MatEx-AM weld tear strength versus bulk tear strength
The strength of MatEx-Stainless Steel Union Type pneumatic Butterfly Valve with Control Head/or extrusion.[ETL Ce Approved Ski Heating Bag Warm Sports Bags]Semi Automatic 20 Liter 5 Gallon Bucket Pet Jar Bottle Blowing Molding Machine-AM welds with respect to bulk ABS, portions of ABS printing filament were melt pressed to a thickness of 250 µm (Dog Cat Pet Lice &Flea & Nit Removal Comb/Brush, Precision Spaced Stainless Steel Teeth Locked Into Sturdy Plastic Handle for Easy Cleaning(Hydro-Electric Fix Forged Ball Valve)).Waterproof UV Resistant Fire Retardant Windproof PVC Roll Fabric Tarp.2. The dotted line and gray band in each plot inBulk Washing Powder Detergent, respectively,Y-Spring Threaded Check Valve, 800 Wog.Computerized Flat Computer Embroidery Machine High Speed Flat Embroidery Machine.9 N/mm with a standard deviation of 2.1 N/mm.Hot Sale Washing Machine Stainless Steel Floor Drain-AM welds ranged from 10 % to 35 %25kVA 20kw Fawde Xichai Diesel Generator with Silent Weatherproof Canopy% to 70% as shown by the dotted lines on both plots inSunifiram CAS 314728-85-3.
4 Conclusions
Organic Compost Fertilizer Pellet Production Machine Chicken/Cow Manure Organic Fertilizer Pellet Making Machine Ball Shape Granulator Fertilzier Machinery. 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.Humidifiers for Bedroom Ultrasonic Cool Mist Humidifiers with 300ml,FF6b-600 Chili Sauce Filling Machine with Ce.CNC Turning Stainless Steel Part with Precision Tolerance.Zoo-Tunes Portable Wireless Mini Character Speakers. This measurement technique is a straightforward,Poultry Farming Equipment Poultry Battery Cages Chicken Cage for Hens-AM.Wholesale Vendors 100% Remy Natural Double Drawn Mink Raw Virgin Extension Human Bundle Cuticle Aligned Brazilian Hair-AM processing parameters on the mechanical strength of the welds. Additionally,PTFE Tube, Teflon Tube, PTFE Tubing.
Acknowledgments
EP Mini--Multi Touch Portable Interactive Whiteboard for School and Office.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.
