Tinplate box uses

Mainly used in the production of food packaging iron boxes and cans, because tinplate combines the strength and formability of steel with the corrosion resistance, solderability and beautiful appearance of tin into one material, which is corrosion-resistant, non-toxic, High strength and good ductility.

Tinplate box thickness

The commonly used thicknesses of tinplate iron materials are 0.23mm, 0.25mm, 0.28mm, 0.30mm and 0.35mm. Smaller iron cans, such as tea tin boxes, stationery tin boxes, etc., can use 0.23mm iron material. For larger ones, such as gift tin boxes, hand-held tin boxes, chocolate tin boxes, etc., you need to use tinplate with a thickness of 0.23, 0.25mm or 0.28mm or above.

Tinplate box implementation standards

1. Inspection standards for welding seams and coatings on iron cans:

Circular iron can welding sewing tape should be smooth and uniform, completely covering the welding seam and the empty part of the paint, and curing completely without large bubbles or iron spots. Inspect the paint on the inner wall of the iron box to see that there is no peeling off, leakage of glue or iron sulfide, and no serious vulcanization spots or oxidation rings. The welds of circular iron boxes should be smooth and beautiful, with even overlaps and uniform welding points. There should be no poor welding or breakdown. The misalignment on both sides of the weld should be less than 0.5mm, and the tailing of the weld end should be less than 0.5mm. 

2. Appearance inspection standards for iron cans:

The pattern and text content of the circular tin box should be consistent with the sample, and there should be no overprinting or missing printing. The pattern and text of the circular tin can should be overprinted accurately, and the overprinting inaccuracy should not be greater than 0.5mm. The body of the tin box should not have edges or burrs, and the patterns and text on the surface of the tin box should have no serious scratches or scratches. The surface of the round iron box must be smooth and clean, without obvious foreign matter or debris. The patterns, text, and ink color on the surface of the packaging tin box must be of correct hue, uniform and bright, the pattern mesh should be clear and layered, and the printed pattern and text should be clear and complete, without deformation, without burrs, bubbles, uneven paint and other undesirable problems. 

3. Iron box material inspection:

The material of the round iron can is tin-plated thin steel plate. The content and specifications of the tin-plated material should comply with the quality requirements of the "National Tin-plated Thin Steel Plate" (GB2520)

4. Iron box shape inspection standards:

The crimping part of round iron cans shall not have sharp edges, false curls or large sagging edges. There shall not be incomplete crimping, crimping teeth, iron tongues, skipping seals, crimping fragments, extruded fillers, sharp edges, or sags. Lips, double lines and other defects caused by the failure of the press head and the metal can curling roller. The tin layer on the wall edge of the circular tin box and the sealing curling edge should be complete. There should be no accumulation of tin or rough tin paths. There should be no obvious scratches and rust on the tin. There should be no leakage caused by blisters. The shape of the tin should be complete. , there should be no deformations such as flat cans or protruding corners.