17
2014
04

Quality control introduction

  • Quality control introduction

  • ISO Quality control 

    Stainless Steel Woven Wire Mesh

    Stainless Steel Wire Mesh Filters

    Reverse Dutch Wire Cloth

     

    Loom Features

    Auto control warp wire feeding, high efficiency. Average

    speed: 80-100 spins/minute.

     

    What is your standard of checking finished products?

    We check quality of end products according to China National Standard GB/T17492-1998, equivalent ISO9044:1990, and our own standard. Send your inquiry to get a solution.

                            

    What is your standard of wire checking?

    We check the wire according to the national standard (GB5330-85) and our enterprise regulation about raw material defects and relative solution.

     

    What is your standard of checking finished products?

    We check quality of end products according to China National Standard GB/T17492-1998, equivalent ISO9044:1990, and our own standard.

     

    What is the major checking items of stainless steel wire mesh?

    First, we check the basic data: wire diameter, mesh counts, roll width and roll length.

    Secondly, the surface condition: opening, color, flat or not and defects.

    Thirdly, the edge of wire mesh should be neat and without defects.

     

    What is your checking standard of reed?

    The steel reed should be flat and clean, with correct wire going, the inside height, inside length and thickness should be correct.

     

    What is the stainless steel material your company usually uses?

    We mainly use SS304(0Cr18Ni9) SS304L(00Cr9Ni10) SS316(0Cr17Ni12Mo2)

    SS316L(00Cr17Ni14Mo2), also SS410, SS4101 and SS430 sometimes.

     

    What is the general packing requirement?

    Stainless steel woven wire mesh is rolled around paper tube first, moisture-proof paper outside or plastic fabrics. Customized packing available.

    What are the common wire mesh defects?

     

                                  1. Folding Marks:The stripe marks on wire mesh

                                  surface that cannot be erased.

                                   

                                  2. Broken Holes:

                                  Multi-pieces broken wires at same site to form a

                                  hole in the surface.

                                  

                                  3. Rusty Spots:

                                  Colored changed by corrosion. Color spots in the

                                  surface.

                                   

                                  4. Broken Wire:

                                  Broken of single wire.

                                   

                                  5. Wire Back:

                                  The wire coiled, tied or twisted into the mesh

                                  forms a protruding above surface. Weft wire tied

                                  up called dead coiling. These will mostly cause

                                  the opening exceeding maximum opening range, or

                                  the wire mesh surface protruding.

                                   

                                  6. Knot Bulging:

                                  Warp wire not well knotted causes bulging out of

                                  the surface.

                                   

                                  7. Weft Twisting:

                                  Weft wire twists.

                                   

                                  8. Wire Doubling:

                                  Two pieces of wire or more get into one. Where

                                  there should be only one weft or warp wire,

                                  inserted two or more wires.

                                   

                                  9. Mistaken Weaving:

                                  Some weft wire or warp wire are woven together in

                                  error. Easily happen for diamond wire mesh.

                                   

                                  10. Loosening of Wire:

                                  Twisting or moving of single or some pieces of

                                  warp wire or weft wire.

                                   

                                  11. Weaving In of Impurity:

                                  Non-woven materials woven in the fabric cause

                                  deformed opening or blocking to affect the

                                  neatness of surface. The soft stuff that cannot be

                                  moved, also not protruding, may remain as defects;

                                  the hard and protruding stuff must be picked out,

                                  otherwise it may damage the neighboring wire mesh.

                                    

                                  12. Flattened Wire: Weft or warp wire deformed by

                                  mechanical operation may cause deformed opening

                                  when woven into wire mesh.

                                  13. Density Error: Aperture density exceeding

                                  density scope causes unqualified mathematics

                                  average value of aperture.

                                  14. Weft Wire Backward: Weft wire backward may

                                  cause irregular aperture or even worse, to make

                                  the opening exceeding deviation allowance.

                                  15. Irregular Aperture: Regular big or small

                                  openings between weft wires. One big opening is

                                  followed with one small opening for Plain Woven

                                  wire mesh. For Twill Woven, usually two big

                                  opening then two small, or one big then three

                                  small, etc.

                                  16. Bulging Out: One site or some sites along warp

                                  direction bulges out, while the aperture does not

                                  change much. This kind of defect influences the

                                  surface quality of wire mesh.

                                  17. Cloud Shape Weaving: Cloud shape bulging

                                  formed in the surface of wire mesh. Caused by weft

                                  wire pressed in a different direction. Usually

                                  occurs during weaving of medium sized wire mesh.

                                  18. Roll loosening: The wire mesh has no intensive

                                  feeling, can be twisted along warp or weft wire at

                                  an angle of 45?

                                  19. Other defects: Including dirty surface,

                                  mechanical folding, rusty spots, extra roll width

                                  difference, insufficient roll length, breaking of

                                  wire mesh, etc.


« 上一篇 下一篇 »

发表评论:

◎欢迎参与讨论,请在这里发表您的看法、交流您的观点。