Purpose: In order to ensure the safety and reliability of food tin boxes and iron rods produced by our company, in accordance with the relevant standards and requirements for green production and production, formulate standards for inspection procedures for tin tin boxes and tin cans; this standard applies to round tin plates made of tin plate The quality requirements, inspection methods and inspection rules of shaped cans are stipulated. Strengthen the supervision and management of the quality of tin boxes and cans to improve the quality level; clarify product quality responsibilities; protect the legitimate rights and interests of consumers; maintain social and economic order;

 Appearance inspection standard of iron box:

1. The printing color, text content and logo color of the iron box are consistent with the sign board (if there is a color difference, the upper and lower limits of the customer sign are the inspection standards);

2. The surface of the tin-plated iron box is smooth and clean, the product is clean, there should be no dirt, there should be no debris in the product, and the product has no serious irritating smell, mildew and other similar problems;

3. The winding wire of the tin-plated iron box must not have a scratching feel, the body of the iron box must not have edges, corners, and burrs, and the patterns and characters on the surface of the tin box should be free from severe scratches or scratches. The length of the scratch on the front of the product must not be >5mm, the side must not be >10mm and the bottom surface must not be >15mm, and only one piece of 50cm2 is allowed. There must be no scratches that affect the recognition of text and barcode;

4. The tin box has clear dots, complete, no ghosting, and no deformation. The pattern, text, and ink color on the surface should be correct, uniform and bright. The pattern and mesh should be clear and layered. The printed pattern and text should be clear and complete, not deformed, free of burrs, bubbles, uneven paint and other undesirable problems;

5. The iron box pattern has no overprinting or missing printing. The iron can pattern and text are overprinted accurately, and the overprinting inaccuracy is not more than 0.2mm.

2. The inspection standard of the shape of the tin box: the coil of the product must not have a scratching feel. The tin layer on the wall and the sealing edge of the round gift tin box should be complete, free of tin piles and tin road roughness, no obvious scratches and tin cans Rust phenomenon, no leakage caused by sand holes, etc., the shape of the iron box should be complete, and there should be no deformation such as collapsed cans or sharp corners. The paint film adhesion force is not lower than ll grade after the paint film comes off after the tape is pulled. When the weight increased to 600g, the paint film was not scratched to the substrate layer. It will not fade, fall off, or wrinkle after cooking.

3. The inner wall paint of iron cans must be tested and submitted according to the corresponding standard according to the paint type and the sanitary inspection report (for example, when using epoxy phenolic paint, the inspection and report must be submitted according to GB4805).

Inspection standard for tinned iron cans

Scope: It is suitable for all the tinned sheet steel round cans of different specifications and varieties used by our company.

Material: The round tank is made of tin-plated steel sheet. The tinned steel sheet should meet the quality requirements of "Tinned Steel Sheet" (GB2520).

Tin can appearance size

The surface of the round tank must be smooth and clean, and no obvious foreign matter or debris should be attached. The can body must not have edges, corners and burrs.

.The patterns and characters on the outer surface of the round tank should be free from severe scratches or scratches.

The ink color of the pattern and text on the surface of the round tank should be correct, uniform and bright. The pattern and mesh should be clear and layered. The pattern and text should be clear and complete, not deformed, free of burrs, bubbles, uneven paint and other undesirable problems.

.The pattern and text content of the round tank should be consistent with the sample plate, and there should be no overprinting or missing printing. The overprinting of the pattern and text should be accurate, and the overprinting inaccuracy should not exceed 0.5mm.

.The tin layer of the round tank wall and the sealing edge should be complete, free of tin piles and roughness of the tin road, no obvious scratches and rust, and no leakage caused by blisters.

.The curling part of the round can shall not have quick mouth, false curling and large collapsed edges, and there shall be no incomplete curling, curling teeth, iron tongues, jumping seals, curling chipping, filling extrusion, sharp edges, and hanging Lips, double lines and other defects caused by the failure of the indenter and curling roller.

.Round cans are required to be evenly marked, and there is no phenomenon that the lid cannot be opened due to poor marking or the easy-open ring is welded. The easy-open ring of the can should be in the same horizontal plane as the lower edge line of the easy-open lid curling, and shall not exceed. 3.2.8 The welding seam of the circular tank should be smooth and beautiful, the overlapping joints should be uniform, the welding joints should be evenly connected, and there should be no poor welding and breakdown. 0.5mm.

.The repair coating tape for circular tank joints should be smooth and even, completely cover the welds and the empty parts of the coating, and cure completely without large bubbles and iron dew points.

.The paint on the inner wall of the round tank should not fall off, glue, iron sulfide, serious vulcanization spots and oxidation rings.

.The shape of the round tank should be complete, and there should be no deformation such as flat tanks or sharp corners.

.The shape and size of the round tank should meet the requirements of the contract or purchase order.

.Round tank size tolerance range

Weight deviation, tank weight ≤100g

Height deviation ±1mm

Diameter deviation ±1mm

Thickness deviation ±0.01mm

.Physical and mechanical properties

Request item

Weld overlap: tank diameter ≤110mm, overlap ≤0.6; tank diameter>110mm, overlap ≤0.7mm

Weld thickness: not more than 1.5 times the thickness of tinned steel sheet used for can making

Empty tank pressure performance: tank diameter <401mm, no deformation under 1.8kg/cm2 pressure, no air leakage under 2.1kg/cm2 pressure;

Tank diameter=401mm, no deformation under 1.0kg/cm2 pressure, no air leakage under 1.8kg/cm2 pressure;

Tank diameter> 401mm, no deformation under 0.5kg/cm2 pressure, no air leakage under 1.0kg/cm2 pressure.

Hemming overlap rate (OL%) ≥50%

Crimping tightness (TR%) ≥50%

Joint cover tin integrity rate (TJR%) ≥50%

Conclusion: Our factory was established in 2006 and has a professional quality inspection team for tin boxes and tin cans. The inspection is carried out in strict accordance with the established testing standards to ensure that our company's food tin boxes and cans are safe, reliable, and environmentally friendly. Our factory is an enterprise specializing in the creative design of tin box packaging and the specialized production and operation of tin box packaging. We have rich experience in tin box and tin can manufacturing. We take quality as the concept and strive to create refined and high-quality iron Box packaging provides customers with packaging design, manufacturing and sales services with years of high-quality services in the industry, and creates highly competitive packaging solutions for customers. If you encounter any problems in the process of ordering tin cans, please let us know. We will answer your questions in the form of emails. Welcome to consult and order!