Twin Welding
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 25 Foot Twin Line WELDING HOSE Cutting Torch Oxygen Acetylene Oxy $30.88 Time Remaining: 15d 3h 34m Buy It Now for only: $30.88 |
 100 FT Oxygen Acetylene Twin Welding Hose Welder Brass Industrial Quality Long $74.39 Time Remaining: 8h 49m |
 25 FT 300PSI Oxygen Acetylene Twin Welding Hose Welder Brass Industrial Type $27.95 Time Remaining: 3d 13h 30m Buy It Now for only: $27.95 |
 25 FT X 1 4 ID Oxygen Acetylene Twin Welding Hose 300PSI Home Business Welder $31.99 Time Remaining: 17d 13h 23m Buy It Now for only: $31.99 |
 25 FT 300PSI Oxygen Acetylene Twin Welding Hose Welder Brass Industrial Type $27.65 Time Remaining: 9h 9m |
 25 FT OXIGEN ACETYLENE TWIN WELDING HOSE TOOL W 025 $25.64 Time Remaining: 18d 9h 29m Buy It Now for only: $25.64 |
 CTD 37670 Cobalt Spot Weld Twin End Drill Bit 80mm $17.95 Time Remaining: 12d 10h 20m Buy It Now for only: $17.95 |
 100 FT OXYGEN ACETYLENE TWIN HOSE WELDING TOOLs1 $69.34 Time Remaining: 19h 16m Buy It Now for only: $69.34 |
 100FT X 1 4 ID Oxygen Acetylene Twin Welding Hose 250PSI Home Business Welder $79.49 Time Remaining: 1d 13h 11m |
 100FT X 1 4 ID Oxygen Acetylene Twin Welding Hose 300 PSI Commercial Welder $84.99 Time Remaining: 17d 14h 57m Buy It Now for only: $84.99 |
 SIAMEEZ TWIN WELDING HOSE BRASS HOOK UPS VICTOR 25 FEET LONG $29.99 Time Remaining: 4d 13h 18m Buy It Now for only: $29.99 |
 25 FT X 1 4 ID Oxygen Acetylene Twin Welding Hose 200PSI Home Business Welder $27.49 Time Remaining: 1d 12h 33m |
 50 FT X 1 4 ID Oxygen Acetylene Twin Welding Hose 300PSI Home Business Welder $47.98 Time Remaining: 17d 13h 35m Buy It Now for only: $47.98 |
 CTD 37660 Cobalt Spot Weld Twin End Drill Bit 65mm $14.95 Time Remaining: 12d 10h 21m Buy It Now for only: $14.95 |
 Twin Welding Hoses 1693 $27.99 Time Remaining: 15d 11h 18m Buy It Now for only: $27.99 |
 100FT X 1 4 ID Oxygen Acetylene Twin Welding Hose 300 PSI Commercial Welder $84.49 Time Remaining: 2d 7h 18m |
 Twin Welding Hose 1 4 x 50 GY 03 1125 Goodyear $68.01 Time Remaining: 29d 14h 37m Buy It Now for only: $68.01 |
 100FT X 1 4 ID Oxygen Acetylene Twin Welding Hose 250PSI Home Business Welder $79.95 Time Remaining: 17d 14h 47m Buy It Now for only: $79.95 |
 25 FT X 1 4 ID Oxygen Acetylene Twin Welding Hose 300PSI Home Business Welder $31.49 Time Remaining: 2d 11h 2m |
 25 FT X 1 4 ID Oxygen Acetylene Twin Welding Hose 200PSI Home Business Welder $27.95 Time Remaining: 17d 15h 7m Buy It Now for only: $27.95 |
 100 FT Oxygen Acetylene Twin Welding Hose Welder Brass Industrial Quality Long $74.95 Time Remaining: 3d 12h 12m Buy It Now for only: $74.95 |
 50 Ft TWIN LINE WELDING HOSE Oxygen Acetylene Oxy Weld $42.88 Time Remaining: 15d 9h 39m Buy It Now for only: $42.88 |
 100FT X 1 4 ID Oxygen Acetylene Twin Welding Hose 300 PSI Commercial Welder $84.49 Time Remaining: 4d 13h 17m |
 CTD 37680 Cobalt Spot Weld Twin End Drill Bit 100mm $24.95 Time Remaining: 12d 10h 22m Buy It Now for only: $24.95 |
 1 4 x 25 Twin Line Welding Hose FPW1412 0021 BRAND NEW $54.44 Time Remaining: 22d 13h 17m Buy It Now for only: $54.44 |
 50 FT X 1 4 ID Oxygen Acetylene Twin Welding Hose 300PSI Home Business Welder $47.49 Time Remaining: 5d 12h 1m |
 Twin Welding Hoses 1694 $44.99 Time Remaining: 15d 11h 21m Buy It Now for only: $44.99 |
 GY 03 1125 Goodyear Twin Welding Hose 1 4 x 50 $74.95 Time Remaining: 19d 11h 12m Buy It Now for only: $74.95 |
Twin Welding
Single Screw Extruder With Long Wearing Surfaces
A method of extending the life of a single screw extruder by affixing tiles of wear-resistant material along the crest of the twin screw extruder flighting threads, and optionally grinding the hardened material to remove any sharp edges. In another configuration of the present sheet production extruder, plates of wear-resistant material are secured to the leading edges of the extruder screw threads to further prolong the life of the extruder screw.
Extrusion is a well-known process that is used in many industries. A variety of products from foods to optical fibers, plastics and metals are produced by extrusion. In the extrusion process, the materials to be extruded are fed into the extruder, a type of giant mixer. The materials are mixed, heated if appropriate, and fed into a barrel that contains an internal rotating screw. The screw moves the liquid or viscous material being extruded (the " extrudate"), out the end of the extruder.
It has been found that the outside edges of the screw threads in the extruder, which mix the extrudate and push it out the end of the extrusion barrel, tend to be more subject to wear than other parts of the screw threads. When the outside edges of the screw threads wear sufficiently, extrudate flows between the screw threads and the barrel, which interferes with the normal extrusion process. To this end, steps have been taken to extend the durability on those parts of the screws that see additional wear. Such steps have included applying a coating of various liquid substances that harden on the screw or applying an additional layer of solid wear-resistant material to the portions of the extruder screw subject to wear. However, it has been found that materials that project out from the surface of the screw are subject to shear during use, and the materials can experience fatigue cracks. Subsequently, pieces of the material can break off and end up being incorporated in the extrudate being mixed. Often this necessitates the disposal of batches of extrudate which are contaminated with pieces of wear-resistant material or coating.
Another solution has been to cut grooves in the crests of the extruder screw threads, and insert other materials, such as molybdenum, in those grooves, as shown in U.S. Pat. No. 5,135,378 to Catton ("Catton"). The Catton process is, however, very complex, involving cutting a groove, laying in a first material along the sides and at intervals as bridges across the width of the groove, then laying in a second material in a liquid state that hardens to form a mechanical bond with the extruder screw. The added material is then ground to form a smooth surface.
Another solution, as disclosed in U.S. Pat. No. 6,346,293 to Douris et al. ("Douris"), is to weld a bead of a hardened material along part of the width of the crest of the extruder screw threads, and then weld beads of a different hardened material along either side of the first bead of hardened material. Subsequently, the hardened materials are ground to the required tolerances.
Therefore, a method and/or apparatus for twin screw extruder the life of extruder screws is needed by making them more resistant to wear wherein the method does not compromise the structural integrity of the screw, nor produce fragments that contaminates the single screw extruder, and is not overly complex, involved or expensive.
This news from here: http://www.giant-extruder.com/news/item_5849.html
About the Author
putting a new engine in, need some advice?
i have a 1998 yamaha v-star with a air-cooled,SOHC, 2-valve, 70°, V-twin 650cc dry slump with 5 speed trans, and a drive shaft too boot!
ok, this is what i want to do i want to take the 650 out and put a 2009 1100cc in, the bike engines look the same,i would have to look up some spec's, my question is would the frame hold it being made for a 650? the frame is made out of steel, it's a heavy sob weighing in at 690lbs(not the frame the whole bike)
1:can the new engine fit on the stock frame
2:would i have to move mounts, and if i did would it be better to make a frame from new metal then welding on new mounts?
3:what kind of metal would you reccomend for this, if i was to make a new frame?
I am not sure that the 1100 would fit onto a 650 frame. I know that with the old Virago line the 750 and 1100 frames were identical, but the difference in weight between the 2 engines was only 5 pounds!
If you have a source for the 1100 motor, then I would suggest going to a salvage yard and buy a good 1100 frame with a title. Sometimes these can be found on ebay as well.
The reason is that you may find it is more than just the motor mounts, it could be differences in electronics -CDI box etc. I do not have a current Yamaha parts swap book, but there are more issues than just the frame supporting the additional weight.
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