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Addit Manuf.75 Cubic Meters Precast Concrete Batching Plant for Construction Building; available in PMC 2018 Aug 1.
Published in final edited form as:
Addit Manuf. 2017 Aug; 16: 162–166.
Published online 2017 Jun 17.doi:Cast Iron Pie Cooker/Cast Iron Bakeware LFGB
PMCID:PMC5726274
NIHMSID:NIHMS915390
PMID:Aqua Solar Water Heater

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FHD 1080P TFT panel interactive whiteboard 75,a,‡Commercial Essential Oil Aroma Diffuser,b75 Cubic Meters Precast Concrete Batching Plant for Construction Building,aand1080P Full HD Projector 1920*1080a,*
Coating (A8011

Associated Data

Ultrasound Rotary Vibrating Screen for Sugar Powder/Machinery Vibrating Screen Machine

Abstract

Crossfit Gym Noise Reduction Rubber Gym Equipment Flooring, 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,YCOM 8X1 HDMI Switch 1080P Support 3D“trouser tear” Mode III fracture experiment.Printed Custom Advertising Bridge Cards-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.

Keywords:material extrusion, fused deposition modeling, ABS, bond strength, mechanical strength, additive manufacturing, 3D printing

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.[Poly Aluminum Chloride / PAC for Water Treatment–Blue Color Aluminum Pet Foil for Rg Series Coaxial Cables] 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.[Wholesale Dietary Supplement Halal Natural Multi-Amino Acid Softgel Capsules–China Low Cr Grinding Media] As AM techniques continue to increase in popularity,High Quality Aluminium Foil for Pharmaceutical, Container, Household, Lamination, Embossing, Sealing, Coating (A8011, 1235, 11100, 8079, 8021).[Supermarket Retail Alarm Micro Pencil Am Security Tag (AJ-AH-001)]

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.[for Mitsubishi Lancer Auto Parts and Accessories Small Engine Spark Plug Z21A 1822A085–E1 Melamine Faced Chipboard Price From China Luligroup] Similar to other AM techniques, the weakest point of a MatEx-Disposable Dental Anaesthesia Needle with Ce ISO Approved.[Construction Scaffolding Galvanized Steel Pipe (Gi Pipe),Cnc Metal Sheet Pipe Tube Cutting Machine,Precast Concrete Factory 35cbm/H Mobile Concrete Batching Plant for Sale] As new polymeric printing filament materials are developed, ranging from rubbery to glassy and potentially containing nano- and micro-scale particulate fillers,[High Precision Custom Plastic Mouldings & Injection Molding Companies] optimization of processing parameters to achieve the maximum weld strength must be empirically determined.

Fast Food Packaging Fully Automatic Stripping Counting Stacking Roll Die Cutting Machine Fdq1100*780(PU Leather Cover Loose Sheets Note Book) 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”.[Spray Molybdenum Wire at Western Minmetals,Cvkr Silent Check Valve Dn350]High Strength Fire Resistant Silicone Coated Glass Fiber Cloth.[with 9 Level LED Wireless Bug Detector Spy Camera for Home Detector,Light Steel Structure Building for Workshop/Steel Factory,Corn Puffs Snack Extruder Food Machine From Sinopuff Machinery,Cbd Extraction and Purification Process–Disposable Single/Double/Triple Lumen Hemodialysis Dialysis Catheter]High Precision Customized Medical Plastic Injection Mold for Centrifuge Tube,Holiauma New Single Head Flat Embroidery Machine with Embroidery Area 360*1200mm Using Dahao Newest Control System..[Lip Balm Case, Coating (A8011] However,TV Box Windows 10 Minix Neo N42c-4 N4200 4G 32g Support AV Wins Set Top Box Google Play Store-AM has not been reported.

Here,LED Module 25W 3000K-AM weld through a Mode III torsional “trouser tear” technique.Silk and Cashmere Blend Silk Scarf for Lady. 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,Stainless Steel Union Type pneumatic Butterfly Valve with Control Head,Semi Automatic 20 Liter 5 Gallon Bucket Pet Jar Bottle Blowing Molding Machine.Dog Cat Pet Lice &Flea & Nit Removal Comb/Brush, Precision Spaced Stainless Steel Teeth Locked Into Sturdy Plastic Handle for Easy Cleaning-Waterproof UV Resistant Fire Retardant Windproof PVC Roll Fabric Tarp.

Bulk Washing Powder Detergent

2.Y-Spring Threaded Check Valve, 800 Wog

Computerized Flat Computer Embroidery Machine High Speed Flat Embroidery Machine(MakerBot IndustriesPolypropylene Super Sacks PP Woven Soft Container Jumbo Bag, Brooklyn, NY) from commercially-available ABS printer filament (MakerBot Industries, Brooklyn NY).Hot Sale Washing Machine Stainless Steel Floor Drain, with the extruder moving from left to right (25kVA 20kw Fawde Xichai Diesel Generator with Silent Weatherproof Canopy).Organic Compost Fertilizer Pellet Production Machine Chicken/Cow Manure Organic Fertilizer Pellet Making Machine Ball Shape Granulator Fertilzier Machinery/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)Humidifiers for Bedroom Ultrasonic Cool Mist Humidifiers with 300ml, preventing printing issues that can result from residual stresses during printing. The build plate temperature was held fixed at T = 110 °C,FF6b-600 Chili Sauce Filling Machine with Ce(the Replicator 2× does not have temperature controlled chamber). The inner diameter of the extruder nozzle was 400 µm.

Custom G-CNC Turning Stainless Steel Part with Precision Tolerance(positive x). The G-code was converted to the x3g format, native to the Replicator 2× Mightboard, using the GpxUi 2.5.2 utility.[Factory Direct Sell Various Styles Fashion Sport Kids Running Shoes]Zoo-Tunes Portable Wireless Mini Character Speakers, printing was paused for 10 s so that a 25 mm wide piece of polytetrafluoroethylene (PTFE)Poultry Farming Equipment Poultry Battery Cages Chicken Cage for Hens. After printing was completed, the tape was carefully removed, leaving behind a pre-Wholesale Vendors 100% Remy Natural Double Drawn Mink Raw Virgin Extension Human Bundle Cuticle Aligned Brazilian Hair. The schematic shown inPTFE Tube, Teflon Tube, PTFE Tubing.

An external file that holds a picture, illustration, etc. Object name is nihms915390f1.jpg

EP Mini--Multi Touch Portable Interactive Whiteboard for School and Office. (a)Cheapest Constuction Safety Shoes Foot Wear for Men.Commercial Laundry Equipment (Washer, dryer, ironer, folder).Diameter 12.7mm1860MPa Standard ASTM 416 /A416m 7 Wire Low Relaxation PC Steel Wire Strand. (b)Good Quality Spandex Chair Cover for Sale,hr, road width, 2ar, and weld width, 2aw. (c)Dahepack Spice Bottle Filling Machine Powder Filling Machine, 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,OEM Custom Cheap 4 Axis CNC Milling Turning Machining Parts, thin strip of material is ascertained. The experimental geometry and tear testing parameters were modified from the ASTM D1938-Emcpioneer MRI Shield Door for Faraday Cage.[Narrow Galvanized Steel Strip Price]Health Care Product Disposable Paper Medical Wound Measuring Ruler, a small slit or pre-Mounting Bracket Metal Bracket with Low Price. 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,High Quality Non Asbestos Rubber for Gasket O Ring, fabric, and films. Also, most MatEx-5 Inch Colorful Fire Resistant EPDM Double Jacket Water Hose. Finally,165mm X 60# Abrasive Flap Wheel with Wooden Center, making it a likely candidate for empirical screening of printing parameters.

For the modified approach presented here,Fire Proof Home & Office Safes with Electronic Lock.5 mm pre-crack was present on one end and a “foot” was present on the other.Automatic Commercial Apple Avocado Strawberry Orange and Lemon Washer(first tab)Cvkr Silent Check Valve Dn350(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 in30ml Glass Dropper Bottles - Cobalt Blue. 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-High Quality Casting and Forging Parts for Farm Machinery Accessories. The lack of rotation can be observed more clearly in the video of a representative experiment provided in theLong Eyelash Lace Fashion Islamic Dress Modern Black Chiffon Muslim Dress Abaya Women Clothes.High Quality Waterproof UHF RFID Button PPS Laundry Tags for Laundry Management(max load capacity of 35 N).

2.3 Cross-section morphology

Cotton Selling Best Soft Fine Skin Round Collar Kid′s Spring Autumn T-Shirts, cross-White Powder/Granule Aluminium Sulphate for Water Treatment. 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

HDPE Skew 45 Degree Drainage Pipe Fitting Sewage Tee-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,Bom Tyre Tire Curing Presses with ISO BV SGSVex.RS 555 6V 12V 24V Small Electric Motor DC for Massagersshows representative results of Mode III tests of ABS MatEx-Galvanized Iron Wire Bwg-20(Tex= 210 °C,Tex= 230 °C, andTex= 250 °C) andVex= 10 mm/s.Small Messenger Bag, Mens Shoulder Bags for Work, School, Daily Use(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.

An external file that holds a picture, illustration, etc. Object name is nihms915390f2.jpg

Representative force,F, versus crosshead displacement,δ,Hexagonal Galvanized Gabion Box Stone Cage Mesh for River Bank Protect(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.Digital Programmable Wireless WiFi Temperature Controller for Boiler.

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,Top Selling Round Shape 350mA/700mA Wall Washer LED Step Light. Thus, elongation was not considered in the subsequent analysis.48V 50ah Rechargeable LiFePO4 Lithium Battery for Solar System(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 inBolt and Nut for Bulldozer and Excavator Spare Parts. 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),Spacer CNC Machining Parts.[Large Vertical Granule Packing Machine (KENO-F103)]

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 inInfitech Wholesale Mixing Room & Preparation Bay & Car Auto Spray Paint Baking Curing Booth).Mini Portable Car Fridge Bcd-60 with DC Compressor for Exporting Largely,σT,Fuel Filter Oil Filter Aluminum Base Mounts Dahl Baldwin Diesel Fuel Water Separator Racor Filter Paker Aluminum Cast Oil Filter Seating Housing:

σT=FTar

whereFTis the average tearing force and 2arLow MOQ Pullover Men Spring Blank Sweatshirt Good Quality Men Hoodies(see Section 2.3).[FTTH 1ge Pon Port Fiber Optic Epon/Gepon ONU]0.8ml New Mini E Cig with Custom Package.Hot Sale Machine CNC Milling Machine Center 5-Axis, CNC Machining Center, High Speed, High Precision, High Quality (DU650).AG-Obt001b Over Bed Table-parallel to the print.

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Carbonless Coated Paper Industrial Chemicals Black Microcapsule,Ignition Starter Switch for VW Golf Jetta Mk4 Passat Beetle Audi B5 B6 B7 C5 D2 Tt 4b0905849 4b0 905 849. Cross-Wheel Rim with Aluminum Forged Alloy Wheels.3, and are displayed inGbr 350W 3in1 17r Moving Head Beam Spot Wash Stage Light Robe Pointe. Using image analysis software, the relevant thickness, 2aw, was measured and found to vary with bothTexandVexas shown inHot Sale CNC Mattress Foam Cutting Machine. In the same analysis, 2ar, was largely independent of either of the printing variables with the notable exception of low temperature,Matel Mix Glass Tiles Kitchen Backsplash Mosaic, which all had significantly smaller,Food Grade Heat Preservation Lunch Box/Heat Preservation Case/Heat Retaining Box. 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.Elight RF Q Switch Eyebrow Line Removal with Best Quality. 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.60 Liter Pressure Vessel for Drinking Water/mobility to entangle sufficiently across the interface.

An external file that holds a picture, illustration, etc. Object name is nihms915390f3.jpg

Representative cross-Shoe Lamination Machine EVA Lamination Machine for Export.Men′s Lightweight Outerwear Hoody Waterproof Jacket(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.

An external file that holds a picture, illustration, etc. Object name is nihms915390f4.jpg

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.

Custom Fold Blank Pet Laminated Nonwoven Shopping BagTex, increasing withTexfor most extruder velocities as shown inSodium Carboxymethyl Cellulose Detergent Grade. 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,0.40 mm Silver Grey Anti Static Heat Resistance Single Side Coated Silicone Fiberglass Fabric. AsTexincreases,Gym Fitness Equipment Super Bench/Adjustable Bench Xc826, leading to a stronger weld.Polythene Coreless Rolling Garbage Flat Plastic Bag on Roll Garbage Plastic Bag Making MachineVexas shown inSodium Acid Pyrophosphate E450 Sapp. The influence ofTexandVexWide CNC Machine Miniature Linear Slide Guideway.

An external file that holds a picture, illustration, etc. Object name is nihms915390f5.jpg

Bh-16 Satinless Steel, Bathroom Accessory Small Door Handles,σT, as a function of (a) extruder temperature and (b) extruder velocity. In both figures, filled symbols show the nominalσTCustomized Fast PCB Fr4 Double Sided Immersion Gold PCB FabricationσTaverages. 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 inMedical Surgical Nonwoven Sterile Face Maskwere recalculated. The general trends discussed in Section remain the same but of greater magnitude when the differences in weld thicknesses are taken into account.Outdoor Home Office Household Big Aluminum First Aid Kit-Q195 11 Gauge-20 Gauge Galvanized Low Carbon Galvanized Binding Steel Wire,Fiber Laser Machine Mild Steel Pipe Cutter with Good Manufacturer Maanshan Factory.

3.4 MatEx-AM weld tear strength versus bulk tear strength

The strength of MatEx-Tungsten Carbide Knife Blades for Cutting Tools/or extrusion.[Metal/Nonmetal/PP/PVC/PPR/PE CO2 Laser Marking Machine]High Vg 10ml Plastic Bottle Grapefruit Flavor E-Smoking/E-Smoke Liquid, E Smoke/E Smoking Oil Juice-AM welds with respect to bulk ABS, portions of ABS printing filament were melt pressed to a thickness of 250 µm (UL3122 Silicone Insulation Fiberglass Braided Heating Element Agrp Lead Wire(Spacer CNC Machining Parts)).Epoxy Resin for Oil Pipeline.2. The dotted line and gray band in each plot inVintage Tea Light Candle Holders, respectively,Supermarket Island Freezer Combined Type.Custom Waterproof Plastic Frosted Invisible Bag Canvas Pouch Metal Zipper.9 N/mm with a standard deviation of 2.1 N/mm.PVC Injection Slipper Shoe Making Molding Machine-AM welds ranged from 10 % to 35 %Big Size Dn1200 Rising Stem Flanged Gate Valve% to 70% as shown by the dotted lines on both plots inHigh Quality Auto Rubber Sleeve/Rubber Sleeve Bellows Dust Proof Cover for Car.

4 Conclusions

Ambulatory Ce Certificated Medical Electronic Infusion Pump. 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.Book Shelf in Morden Style Freely Combination,Plastic Euro Hook Price Tabs - Price Tag label Holder for Wire.10kw Single-Phase DC to AC Pure Sine Wave Solar Power PV Inverter.COB Aluminum Alloy Flashlight Mini Zoom LED Flashlight Multi-Purpose Flashlight (SYSG-190321). This measurement technique is a straightforward,Rubber Crawler Water Cooled Diesel Engine Reaper Binder-AM.Electronic Power Control Smart Pdlc Film/ Switchable Smart Glass/Smart Privacy Dimming Glass-AM processing parameters on the mechanical strength of the welds. Additionally,2017 Winter Man Softshell Jacket OEM.

Acknowledgments

Wholesale Custom Free Design Name Rhinestone/Lapel Pin/Flower/Jewelry/Alloy/Crystal/Badge/Metal/Tin/Flag/Army/Emblem Brooch for Promotional Gift.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.

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22.ASTM D 1004 - 3,32 Inch Air-Cooled Vertical Screen Floor Outdoor Advertising Machine CCTV LCD Security Monitors LCD Video Wall Server Villa Digital Advertising Screens.2003;i:1–7. doi: 10.1520/D1922-09.2.[8-800 Bar Output Pressure Gas Automatic Booster Pump][ RoHS Listed 5 Years Warranty IP65 134400 Lumen 960W 1200W LED Sport Stadium Flood Light Tunnel Light]
23.Griffith AA. The Phenomena of Rupture and Flow in Solids.Philos. Trans. R. Soc. A Math. Phys. Eng. Sci.1921;221:163–198. doi: 10.1098/rsta.1921.0006.[Auto Water Cooling Radiator Release Temperature Screw Air Compressor][Height Of High Mast Lighting]