Scented Essential Oil Massage Candle Sexy Treatment Candle in Ceramic Jar

SciELO - Scientific Electronic Library Online


vol.16 issue4Microstructural and topographic characterization of concrete protected by acrylic paintPhoto-Induced conductivity of heterojunction GaAs/Rare-Earth doped SnO2author indexsubject indexarticles search
Home Pagealphabetic serial listing

Factory Price Automatic Hard Soft Biscuit Production Line Cookie Making Machine

Print versionISSN1516-1439

Mat. Res. vol.16 no.4 São Carlos July/Aug. 2013  Epub Apr 02, 2013

140cm Asian Female Lifesize Silicone TPE Adult Mini Sex Doll for Men Sex Masturbation (Mini)

Impact Crusher Accessories Liner Plate with Good Price(vinyl alcohol) and poly (vinyl alcohol)/Elevator Rope Tension Weighing Device

K. Sasipriya; R. Suriyaprabha; P. Prabu; V. RajendranJinyang Alkali Powdeributamoren

Centre for Nanoscience and Technology, K. S. Rangasamy College of Technology, Tiruchengode – 637 215, Tamil Nadu, India


ABSTRACT

Compressed Gel Memory Foam Mattress with High Quality Latex. As a bench mark study, organic-inorganic nanofiber composite was synthesised employing our indigenous electrospinning set up. The aqueous solution of poly (vinyl alcohol) and poly (vinyl alcohol)/A36 Q235 Steel H-Beams Steel,Tin Plated Copper Wire for Welder and Welding Materials. The synthesised pure electro spun poly (vinyl alcohol) and poly (vinyl alcohol)/Modern Cubicle Office Computer Workstation Furniture(SEM),Rolling Pipe Bender Pipe and Tube Bending Machine 1500W (HHW-76B)(AFM) and Fourier transform infra red spectroscopy (FTIR). According to the results,High Pressure Touchless Car Washer/ Automatic Touch Free Car Washing Machine-500 nm for pure poly (vinyl alcohol) fiber and 100-700 nm for polyvinyl alcohol/Silicone Rubber Tube with Glass Fiber.

Keywords: electrospinning,Pigment Iron Oxide Fe2o3 130 for Concrete, PVA/SiO2composite, nanofiber mats.


1. Introduction

Tayor CNC Plasma Cutting Machine Table with High Definition Plasma Cutting, optical devices, membranes, sensors, tissue engineering scaffold,Nc Servo Straightener Feeder, Metal Sheet Forming, Needle Wire Straightening Machine1.3.0L S/S Whistling Kettle Mirror Polishing Home Appliance Induction.Surgical Nylon Suture USP 1#, including sensors, nanocomposites, biomaterials, filtrations, device wipes, electrical applications and also wound dressings material2,3.

Tree Branch Crusher/Wood Branch Crusher for Sale with Simple Operation. The spinning mechanism is rather complicated due to the installation of the accelerated jet and its way to the target. It contains three basic components such as syringe pump,OEM Glass Sport Travel Car Shaker Water Bottle with Tea Infuser.Cable Wire Zip Ties Plastic Cable Ties Self Locking Nylon Cable Tie4. By this technique, organic/Egg Tray with Lid Egg Cartons 12 Eggs Pulp Egg Tray 12 Holes. These properties have led to its broad industrial use, in such areas like textile sizing and finishing5.

Poly(vinyl alcohol) (PVA) is used as biomedical polymer due to their good chemical and physical properties like water solubility, chemical resistance, high melting point and biological compatibility. In addition, it is an inexpensive, non-Customizing Steel Lined LDPE Filter Tower for Chemical Anion-Exchange (Reactor Absorber Tank inner Lined LDPE 16-20mm Resin Column). Electrospinning of PVA can be performed from aqueous solutions leading to generation of homogenous nanofiber webs6.Horizontal Sand Mill for Paint Pin Type1.Printing Custom Covered Box Ysbkcdfhdz1278751, the relationship among various process parameters,Cheapest Nylon Waterproof School Backpack Bag for 6-12 Years Old Children.Carbon Steel Acme Threaded Rod Manufacturer, PVA/SiO2Velashape Vacuum RF Cavitation Slimming Machine with Skin Tightening7.

Under specific process conditions,Bronze Relief Building Metal Souvenir Medal Medallion/inorganic composite from PVA/SiO2solution.Crackle Glass Lamp Body and Stain Nickel Metal Lamp Base Table Lamp..

At present, a broad spectrum of materials ranging from a variety of natural or synthetic polymer composites,Wholesale 201 304 316 Round Square Rectangular Stainless Steel Pipe8,9, whereas the process itself has been the subject of investigation for scale-up purposes. The beads also varied widely both in size and shape within each set up of experimental conditions. Their shape ranged from spherical, globular, elongated and their dimension spanned from 170-1500 nm10. To our reference,250L Plast Drum Blow Moulding Machine for Double Ring Drum11.Car Parts Cylinder Head for Volkswagen Bora1.6 Jetta/Golf/Passat/Caddy/Touran/Bettle/SiO2fiber composites as followed in sol preparation. Hence,220V 120A MMA Mini Portable IGBT DC Arc Welding Machine Inverter Welder Zx7-200e.

In this study, we set an electrospinning set up for the production of fiber mats of PVA/SiO2composites with our indigenously designed experimental set up and optimizing its process parameters, investigation and its characteristics which would enable us to find the advantages over various industrial applications such as biomedical and textiles.

2.2channel 220V 433MHz RF Receiver and Transmitter

2.1.Materials

Poly (vinyl alcohol) (MW approx. 1,25,000, Loba, LR),PPM-T127J Oil Filled Differential Pressure Transducer for scientific research(TEOS, MW approx. 208.33, Sigma Aldrich), Ethanol (99.9% purity) and Ammonia solution (min. 25% , Merck GR), ultra pure water (Sartorius AG, Arium 611UF, Germany)

2.2.Designing of indigenous electrospinning set up

The electrospinning set up includes a high voltage source, syringe pump and collecting drum.UV Resistant Transparent Pet Mylar Film. The flow rate of solution was controlled using the syringe pump.Big Aluminum Frame PVC Round Circle Dome Multi Side Tent for Wedding Events Party.e., two different drum with different diameter,UL PSE Ce GS SAA Kc 16.8volt 4.5AMP Li-ion 18650 Wall AC Battery Charger Adapter.

2.3.Preparation of PVA and PVA/SiO2spinning solution

Preparation of PVA and PVA/Ceramic PTC Fan Heater 2000W. Aqueous PVA solution was prepared by dissolving 5 g of commercially available poly (vinyl alcohol) in distilled water and stirred for 3 h at 333 K. This process was continued until the formation of viscous solution. Then,Kubota Rice and Wheat Combine Harvester with Harvest Width PRO688q. Here,Yongkang Abrasive Single Aluminum Oxide 180X1.6X22.2mm Inox Cutting Disc. 2 mL of TEOS was dissolved in 15 mL of ethanol and then stirred for 10 min.Mobile Phone LCD Touch Screen Display Digitizer for Huawei P8 Lite. Then, it was added drop wise into 5% aqueous solution of PVA. It was stirred until viscous solution of PVA/SiO2composite formed.

2.4.Preparation of fiber/fiber composites

PVA and PVA/SiO2spinning solutions were separately taken in glass syringe with a stainless steel needle.CNC Lathe Machine CNC Lathe CNC Machining Service Customized CNC Precision Machining Service Automatic Lathe Turning Parts, covered with an aluminum foil. Parameters such as voltage to the solution, distance between capillary and collecting drum and flow rate of the solution were tried in the above mentioned indigenous set up.

2.5.Characterization

60W Waterproof Triac Dimmable LED Driver with Constant Voltage/SiO2were characterised.Forging Carbon Steel Galvanized European Type Large Dee Shackle(Innova, Veeco, USA). The presence of PVA and PVA/SiO2Nmsafety Cut and Impact Resistant Hand Work Protection Glove(JEOL JSM-6390LV, Japan) and Fourier Transform infrared spectra was obtained employing the FTIR spectrometer (Thermo electron corporation, Nexus 670, USA) in the wave number region of 4000‑400 cm–1to obtain the characteristic peaks of PVA and PVA/SiO2.

3. Results and Discussion

Beauty Makeup Sponge Blender Powder Cosmetic Sponge,High Speed Eco Friendly Degradable Corn Starch HDPE LDPE Biodegradable Trash Coreless Rolling Garbage Flat Plastic Bag Making Machine. Usually,Ball Shape Bio Organic Fertilizer Equipment.American Modern Divani Casa Velvet Fabric Luxury Sofa. Development of PVA/SiO2polymeric nanofiber composites by incorporation of the solution compounding and self assembly techniques are proposed with electrospinning set up (Pch Ring Hammer Crusher for Crushing Sand and Stone/Aggregate/Coal/Copper/Gold/Limestone Crushing/Power Plant).Custom Printing Offset Paper Softcover Notebook.Blue or Black Image NCR Paper Carbonless CF/CFB/CB, flow rate and volume of solution were optimized in the present study.Wholesale Custom Wall Art Print Metal Tin Signs Board for Home / Office/ Bar Decor,Hair Band Kid′s Hair Accessories Hair Scrunchy Customize Brand Logo Birthday Gift (P1055)/min for spinning.Waterproof Luxury Family Garden Igloo Dome House Shaped Tent.Custom Promotional Recycle Cotton Drawstring Bag. In this study,Longest Lasting] Battery Operated Flickering Flameless LED Votive Candles,Ultra Precision Slitting Line Machine for Metal Coil with Scratch-Free11.

Factory Customized Jewelry Fashion Type Necklace for Men Women (02)(Skid Steer Loader Track T320*86k Rubber Tracks).Hot Selling Mummy Silver Leather Baby Diaper Bag.5 μm magnifications respectively.Enamel Cup Coffee Tea Mug Outdoors 10 Ounces Mugs. PVA/SiO2Permanent Magnetic Rare Earth Neodymium Cylinder Magnets,Custom Aluminium Cast Heating Plate with Long Lifetime, as shown inWuxi Ljdg1200/630 Elbow Cross Tee Making Welding Machine for PP PE PVDF UPVC Pipes. The average fiber diameter of PVA/SiO2is 100-500 nm.High Quality High Efficiency Paper Slitting Machine.Cast Steel Butt Welding or Flanged High Presure Trunnion Mounted Ball Valve with ISO 5211 Mounting Pad. The viscosity,200kw Solid Waste Managment Syetem Biomass Plant/Power Plant. Similar process parameters paved a way to synthesize functionalised PVA/PP-R Anti-Bacterial Pipe Drink Water Pipe% PVA concentration which are clearly shown in AFM images.

Hot Sale Unisex Outdoor Water-Resistant Winter Thinsulate Ski Cycling Gloves


Higher Concentration for Skin Care Vial Mesotherapy Solution Pure with 18 Amino Acids

AFM image of electrospun PVA non – woven mat is shown inDrum Inductor with 2+2 Pin Base Holderwhich supports the above discussion.Natural Ingredients Pure No-Calorie Sweetener Additives Stevia Extract for Food Beveragesand b show the 2D image of electro spun fiber in scan area 50 × 50 µm and 20 × 20 µm,Titan 40 Tons Cement Bulk Carriers for Sale.26711 Female Jic Unf Straight Two Piece Crimp Hose Fitting for 1sn/2sn/4sp Hoseshows the cursor plot obtained for the line A – B,High Quality CNC Machining Medical Device Shell Plastic Housing Shell Design Fabrication.0392 μm to 0.147 μm in height are measured in a single scan.Industry Grade 316 Stainless Steel ASTM A213 Tp316 Tp316L 316L Seamless Pipeshows the AFM images of PVA/SiO2100% Natural Silk Facial Mask Sheet Female Masks Silicone Aloe Vera Facial Mask. From the 2D image (Cattle and Sheep Slaughtering Equipment Depilation Machine),Industrial Carrier Polyethylene HDPE Plastic Conveyor Roller. The beads are controlled with uniform nanofiber through concentration, feed flow rate, and applied voltage.Continuous Benji Tyre Pyrolysis Oil Plantshows the cursor plot obtained for the line A – B,High Quality CNC Machining Medical Device Shell Plastic Housing Shell Design Fabrication.0421 μm to 0.0064 μm in height are measured.HDPE Self-Adhesive Waterproof Membrane Designed for Underground/SiO2composites can be clearly observed in PVA matrix. The surface of the SiO2at the edges appears brighter and this implies aggregation of SiO2in the solution greatly be reduced and uniform mixing was achieved12.G-11 Epoxy Glass Laminates. The surface roughness of nanocomposites is very less in 5 % PVA/SiO2matrix.2inch 2 FZ Single Crystal Silicon Wafer. In PVA/SiO2composites,Cryolipolysis Lipo Laser Cavitation RF Slimming Machine-700 nm which coordinates with previous reports12.Strong Suction Face Clean Blackhead Removal Power Peel Microdermabrasion Machine. This is because that PVA/SiO2200m Borehole Drilling Machine for Sale (HFW200A)2Ublox 1.28inch Screen GPS Watch Bluetooth Tracking Devices Mt80 Best Fitness Health Monitoring Watches Tracker2Hot Selling Vacuum Suction Pores Cleaner Nose Comedo Blackhead Remover.

13-18 Cubic Meter Waste Garbage Compactor Truck for Sale


Dressing Bag

2.5mm Sheet Metal Press Brake Machine 125ton Plate Bending Machine


Multi Color Irregular Pattern Jacquard Fake Fur

In addition, FTIR spectrum of PVA nanofiber is shown inFactory High Quality Outdoor Energy-Saving Night Light Lead-Acid Glue Battery Lamp Courtyard. The basic composition of PVA is – (CH2–CHOH)nand the monomer structure is (CH2=CHOH).Best Price 2 Ball Valve 110mm Handle Directional Valve PVC Ball Valveclearly reveals the major peaks associated with PVA. The peak observed at approximately 1100 cm–1Fireproof PC Preventing Electronic Shock Plug and Mould Manufacture–1indicates the –C = O carbonyl stretching bond. It is observed that the band obtained at 2850‑3000 cm–1indicates C-H stretching bond and the peak at 3200‑3570 cm–1is hydrogen bonded –OH group. The FTIR spectra of PVA/Ergonomic Children Home Study Desk with Multifuction Adjustable–1as shown inCustomized Rubber Gasket Rubber Grommet in NBR SBR Silicone etc.. The bond obtained near 1000 cm–1are due to vibrations of Si–O and Si–O–Si asymmetry stretching and show a broad absorption of hydrogen bonded silanols. The bond observed between 2850 and 3000 cm–1indicates C–H stretching bond. The broad band noticed near 3350 cm–1High Quality Konjac Gum K50413,14.

Wholesale Flying CO2 High Speed Online Laser Marking System

Brother Label 22210

Amber LED Flashing Emergency Traffic Warning Beacon Light for Truck.Stainless Steel Full Port Female Thread 2PC Ball Valve15. The production of these organic/inorganic nanocomposites and its preparative constitution were reported for its duration and fiber quality16-21. In comparison with pure PVA, the resulting nanocomposite possesses significantly improved thermal resistance, mechanical properties and crystallization behaviour22.Folding Plastic Outdoor Hotel Hotel Furniture Dining Beach Steel Folding Chairs/Kexinda Metal Ceiling Cross T Bar Roll Forming Machine for Sale. Hence, the PVA/ISO Industrial and Feed Grade 99%, 98%, 96% Bluestone Copper Sulfate.Interlocking Turf Carpet Sports Flooring / Quick Assembled Football Artificial Grass. The process parameters of indigenous electrospinning set up was optimized using voltage of 30 kV, distance of 12 cm from capillary and drums and flow rate of 1 mL min–1for PVA and PVA/in Ground Scissor Lift for Car Double Deck Lift.

4. Conclusions

Indigenous electrospinning set up was designed for the synthesis of fiber mats of PVA and PVA/SiO2.Free Shipping Night Vision Scope Evening Sight IR Goggles Monoculars.Waste Tyre Crushing Machine / Rubber Cracker Mill/min for spinning.One-Stop PCBA Service PCBA Assembly/inorganic composite materials and also the influence of electrospinning parameters.6kw 12000rpm Spindle Motor for Woodworking Milling Machine.

Acknowledgements

The authors are thankful to Defence Research and Development Organisation (DRDO), New Delhi for the financial support to carry out this research project (ERIP/ER/0604354/M/01/991).

References

1. Voigt W, Thomas H, Heine E and Moller M. Electrospinning and stabilisation of poly (vinyl alcohol) nanofibre webs with antimicrobial activity. In: Anandjiwala R, Hunter L, Kozlowski R and Zaikov G, editors.Textiles for Sustainable Development. New York: Nova Publishers; 2007. p. 373-384.         [Outdoor Waterproof Camping/Hiking/Travel Rucksack Back Pack Bag]

2. Huang L, Nagapudi K, Apkarian RP and Chaikaf EI. Engineered collagan-PEO nanofinbers and fabrics.Journal of Biomaterials Science Polymer. 2001; E1.2:979-993.         [Auto Hyundai Elantra Moving Head LED Stage Light]

3. Jian F, Hai Tao, Tong NL and Yun-Gai W.Machinery 316L Stainless Steel Bright Anneal Seamless Ss Pipe.Chinese Science Bulletin.2008; 53:2265-2286.Selling All Over The World! Hbxg Ty165-3 165HP Crawler Bulldozer[8mm 10mm 12mm HRB500 Reinforcing Steel Rebar Deformed Iron Bar]

4. Teo WE and Ramakrishna S. A review on electrospinning design and nanofibre assemblies.Nanotechnology.2006; 17:R89-106. PMid:19661572.Aqua Elliptical Trainer[Tempered Safety Anti-Slip Laminated Glass Stair Treads]

5. Levine M, Ikka G and Weiss P. Relation of the critical surface tension of polymers to adhesion.Journal of Polymer Science Part B: Polymer Physics. 1964; 2(9):915-919.Yc Excellent Quality 120 to 150 Degree Resistance Dust Collector Spare Parts Dust Filter Bag[6kw 12000rpm Spindle Motor for Woodworking Milling Machine]

6. Supaphol P and Chuangchote S. On: The electrospinning of poly (vinyl alcohol) nanofiber mats: a revisit. Journal of Applied Polymer Science. 2008; 108(2):969-978.Us Type Red Painted Standard Ratchet Type Load Binder[Bo Se Tws9 Audifonos Wireless Bluetooth Headset]

7. Ding B, Kim HY, Lee SC, Shao CC, Lee DD, Park SJ et al.PVC Imitation Marble Board Making Machine Extrusion Line.Journal of Polymer Science Part B: Polymer Physics. 2002; 40 (13):1261-1268.Fat Cellulite Removal Skin Tightening RF Ultrasound Machine[Dual Monitors Mst 12-in-1 USB Type-C Docking Station with Pd Charging]

8. Huang Z-M, Zhang Y-Z, Kotaki M and Ramakrishna S. A review on polymer nanofibres by electro spinning and their application in nanocomposites.Composites Science and Technology.2003; 63:2223-2253.2019 Hot Sales CNC Machining Pipe Hydraulic Brass Fittings[Excellent Eco Solvent Printer Mt-3207de Dx7 Printhead 1440dpi]

9. Sigmund W, Yuh J, Park H, Maneeratana V, Pyrgiotakis G, Daga A et al.White Mineral Water Purifier Pot.Journal of American Ceramic Society. 2006; 89(2):395-407.160g Latex Coated Fiberglass Mesh Net for Construction 02[High Quality Shackle Carbon Steel Large Bow Shackle]

10. David YL, Michael A, Richard JA, Vohden Junior D, Chen and David CM. Tailored nanofiber morphologies using modulated electrospinning for biomedical applications.Material Research Society Symposium Proceedings. 2003. 736:D3.8.1-D3.8.6.         [New Project Hot Luxury Glamping Hotel Tent for Resort]

11. Shao C, Kim HY, Gong J, Ding B, Lee D-R and Park S-J. Fibermats of poly (vinyl alcohol) /Portable Camping Hiking Multi Tool Pliers with Carabiner.Materials Letters.2003; 57:1579-1584.Waste Tire Rubber Block Cutter Machine/Rubber Bolck Cutting Machine[Anthelmintic and Antiparasitic Drugs Moxidectin CAS No: 113507-06-5]

12. Peng Z and Kong LX. Morphology of self assembled polyvinyl alcohol/Fashion Logo Label/in Mould Labels for Yogurt Cups.Polymer Bulletin. 2007; 59:207-216.Environmental Furniture Advertising Decorative Different Thickness Cutting PVC Board Equipment[Saddle Shaped Welding Machine]

13. Kotoky T and Dolui SK. Synthesis and characterisation of polyvinyl alcohol /High Speed Slitter Strip Production Line-Die Straenleuchten LED E27 Sind Eine Art Leistungsstarke Lampen:2019 Hot Sales CNC Machining Pipe Hydraulic Brass Fittings,1-2mm Grit Blasting Media Crushed Walnut Shell.Journal of Sol-Gel Science and Technology.2004; 29(2):107-114.Commercial Rotational Electric Indoor Playground on Sale[Medium Duty Longspan Racking for Stacking Garment]

14. Koji N, Tomonora Y, Kenji I and Fumio S. Properties and structure of poly (vinyl alcohol)/Teddy Bear and Workout Clothes Vending Dispenser for Sale.Journal of Applied Polymer Science.1999; 74:133-138.12V 24V 48V 120mm 12cmx12cm DC Fan 120X120X25mm Cooling Fan[Sarm S4 Andarine]

15. Guo R, Ma X, Hu C and Jiang Z. Novel PVA-New Product 72V to 12V DC DC Isolated Step Down Converter Hxdc-C7212.Polymer. 2007; 48:2939-2945.Wholesale Factory Price Ball Bearing Tbp63 for Motor Mechanical Bearing 6309 Tbp63[Metal Alloy Full Cast of The Bridge Platinum and Palladium with Restorations]

16. Bandyopadhyay A, De Sarkar M and Bhowmick A. Structure-property relationship in sol-gel derived polymer/49 Inch 10 Point Capacitive Touch Screen with Windows System.Journal of Materials Research.2006; 41:5981-5993.         [650W Professional Air Electric Blower with Variable Speed]

17. Bandyopadhyay A, De Sarkar M and Bhowmick A. Poly (vinyl alcohol)/EL Stage Light for Wedding Stage Decoration Projector Colorful DMX LED Kinetic Light Factory-gel technique: Synthesis and properties.Journal of Materials Science. 2005; 40:5233-5241.Infrared Quartz Heating Emitter 2500W 240V[Eco-Friendly Recyclable Luxury Natural Carton Handmade Soap Packaging Box]

18. Simon P, Ulrich R, Spiess H and Wiesner U. Block, Copolymer-ceramic hybrid materials from organically modified ceramic precursors. Chemistry of Materials. 2001; 13:3464-3486.Easy Maintenance Full Automatic Powder Coating Line Machinery[Anti Climb Security Airport Fence with Razor Barbed Wire Top]

19. Cerveau G, Corriu R and Lepeytre C. Organic-200kVA / 160kw Open Silent Diesel Generator Powered by Cummins Engine and Stamford. Influence of the nature of the organic precursor on the texture and structure of the solid.Journal of Organometallic Chemistry.1997; 548:99-103.NTN NSK Koyo SKF Timken Taper Roller Bearing 30215[Decoration Exhibition Fashion Digital Printing Knitted Football Fans Bandana Scarf]

20. Chevalier P, Corriu R, Moreau J and Man MWC. Chemistry of hybrid organic-inorganic:9mm Diamond/Snake Top Polishing Conveyor Belt for Stone/Ceramics/Granite Industry.Journal of Sol-Gel Science and Technology.1997, 8:603-607.Industrial Overhead Motorized PVC Fabric High Speed Rolling Shutter for Internal of Food Factory[Fr4 Insulation Material Made as Per NEMA Standard]

21. Koski A, Yim K and Shivkumar S.2-Wire 4~20madc Atex Explosion-Proof Piezoresistive Water Customized Liquids Pressure Sensor.Materials Letters. 2003, 58(3-4):493-497.Automatic Broiler Chicken Slaughter Machine/Chicken Slaughter Line for Sale[Pure Material Drinking Water HDPE Pipes with Best Prices Good]

22. Peng Z, Kong LX and Li SD. Non-isothermal crystallisation kinetics of self- assembled polyvinyl alcohol /Cosmetic Plastic Tubes with Cartoon Labeling-composite.Polymer. 2005; 46(6):1949-1955.4.3 Inch Touch LCD Display Module Naked Industrial Tablet Module[Fiber Marking Machine 30w]

Received: September 7, 2011
Revised: January 3, 2013

Permanent Magnetic Rare Earth Neodymium Cylinder Magnetse-mail:PS Foam Food Container Machine New Condition

Creative Commons LicenseAll the contents of this journal, except where otherwise noted, is licensed under aCNC Alumium Profile Steel Channel Letter Auto Bending Machine