Forward Filter Manufacturers Co.,Ltd.
Forward Filter Manufacturers Co.,Ltd
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Durable Perforated Filter Tube For Enclosures , Partitions , Sign Panels , Guards , Screens
| Material | Sheet thickness |
| zinc-dipped steel galvanized steel stainless steel aluminium | 2 and 2.5 mm depending on demand 1.5 and 2 mm 2 and 2.5 mm |
| R raster pitch manufacture lengths L widths B heights H edge folding tbub | 125 mm n x R, max. 6000 mm 250, 300, 400 mm 50, 75, 100 mm approx. 10 mm |
Materials for Perforated metal sheet: low carbon steel plate, stainless steel plate(SS430,SS302,SS304,SS316), brass plate, aluminum plate, titanium plate;
Thickness of Metal: 0.3-12.0mm ;
The standard Size of Sheet: 1220*2440mm,1200*2400mm,1000*2000mm or customized;
Perforations: round, square, diamond, rectangular, octagonal cane, Grecian, plum blossom OR Customized; The Min. Hole size is 0.08mm(0.0032″);
Surface Treatment: PVC coated,Powder coated,Anodized,Paint, Fluorocarbon spraying,Polishing;
Perforated Metal Finished Process: Leveling, Shearing, Circle Shearing, Bar Coding, Labeling, Custom Packaging, Degreasing, Deburring, Forming, Blanking, Annealing Painting, Powder coating, Anodizing, Welding, Polishing, Joining, Bending, rolling.
Spacing of Perforations: Spacing for large perforations will be designated be either Center of perforations, or by the Open Area required. Spacing for small perforations will be designated by either Centers, or Open Area, or if more practical, by the Number of Perforated to the Square Inch.
Pattern of Perforations: Staggered Perforations, both Round &Square: Direction of the stagger will normally be the short dimension of the sheet. Straight row of hole is normally parallel to long dimension of sheet.
Slotted Perforations: The long dimension of the slots can be finished with either the width or length of the sheet in most cases.
Margins: Perforated Stock Size Sheet & Plates: The long sides of the sheet will be supplied with minimum margins. The short sides of the sheet will have either minimum margins or no margins.
Sheets & Plates Re-sheared after Perforating: Special margins are available to specifications but the must carry a tolerance within the limits of the perforating tool.
Unfinished end pattern is standard in the industry.
Flatness of Sheet & Plates: In the majority of requirements, perforated sheets or plates can be furnished to AISI flatness tolerances. Before ordering any of the following special requirements, discuss then with our sales department:
Perforated sheets with extra wide margins.
Blank areas required within the perforated area.
Perforated sheets with very large percentage of open area.
Heavy page metal in relation to the size of the perforation.
Special alloys.
Stretcher leveled sheets.
Guidelines for Minimum Hole Size/Minimum Space: The rule of thumb for perforating is that the hole diameter should not be less than the thickness of the material. The closer to a 1-to-1 ratio, the higher the probability of tool failure and the greater the precautions necessary to avoid it. Modifications can be made in certain instances at additional costs. For stainless steels and similar higher strength materials, it is perforable to specify at least three thickness gauges thinner than hole diameter.
The same general rule applies to space. The space should be greater than material thickness because of the increased number of punches and therefore, increased perforation tonnage. The space width can be adjusted at increased costs.
