How to inspect stainless steel thermos cup?

Hello everyone, "Dong Dong Talks About Cups" is here. Recently, the editor has encountered some confusing things. In business, some customers do not know how to accept stainless steel thermos cups. There are two main manifestations of this situation. http://www.zhanyict.com/en/ProductsDetail-VB-10408.htmlOne is that there is really no experience in accepting stainless steel thermos cups, so they accept them according to their own ideas; the other is that they know the acceptance standards for stainless steel water cups but pretend not to understand them. Today, the editor will share with friends how to accept stainless steel thermos cups? What are the standards that should be referred to?

For the purchaser's QC or ordinary consumers (except those with severe obsessive-compulsive disorder and perfectionism), the points that need to be paid attention to when accepting stainless steel thermos bottles are the same. http://www.zhanyict.com/en/ProductsDetail-VB-10408.htmlThis includes inspection of appearance, size, touch, material and functionality. Of course, inspection of the accessories and auxiliary materials of the water bottle is also essential.

Appearance inspection includes whether the water cup is deformed, bumped, whether the paint (plastic powder) is unevenly sprayed, rough, or has too many colors. At the same time, it is also necessary to observe whether the pattern printed on the surface of the water cup is clear and complete. For the purchaser's QC, it is necessary to put the already sprayed water cups together for color difference comparison, but it is not necessary for ordinary consumers. http://www.zhanyict.com/en/ProductsDetail-VB-10408.htmlRegarding the surface of the water cup with noisy colors or spots, according to the most stringent water cup quality implementation standards at present, if there are 1-2 spots on one surface when observed by human eyes at a distance of 50 cm, and the maximum diameter of the spots does not exceed 0.3 mm, it is a qualified product.

The size inspection includes whether the size of each position of the finished water cup is consistent with the design requirements. This is mainly required by the purchaser's QC acceptance. Ordinary consumers do not need to check this because they have no reference. Is the water cup out of round? Is it serious? http://www.zhanyict.com/en/ProductsDetail-VB-10408.htmlThe out of roundness of the water cup is also clearly stipulated in the quality implementation standards. Is the mouth of the water cup flat? Does it affect the sealing function? Is the bottom of the cup flat? Is there any tilt, etc.?

The touch inspection includes all spare parts related to the function and use of the water cup, including the cup body, cup lid, handle, lifting ring, shoulder strap, lifting rope, etc. http://www.zhanyict.com/en/ProductsDetail-VB-10408.htmlThe touch inspection is to see if there are any burrs, protrusions or places that are rougher than specified. The touch inspection also includes the smell inspection to see if the finished water cup and accessories have any peculiar smell or severe irritating odor.

The material inspection also includes the materials of all accessories related to the function of the water cup. Are the materials in contact with water food grade? http://www.zhanyict.com/en/ProductsDetail-VB-10408.htmlAre other materials not in contact with water harmful? Are they resistant to wear and corrosion?

Functional inspection includes the sealing, heat preservation and integrity of the accessories of the water cup. The sealing inspection method is to fill the water cup with water, close the lid and turn it upside down for 15 minutes. If there is no leakage, it is qualified. http://www.zhanyict.com/en/ProductsDetail-VB-10408.htmlThe heat preservation performance and the integrity of the accessories should be tested according to the design requirements.

In addition to the above-mentioned acceptance methods, the industry also has implementation standards, which I will not introduce here, http://www.zhanyict.com/en/ProductsDetail-VB-10408.htmlbecause the implementation standards are implemented by production factories like my factory on the one hand, and by the purchaser's QC on the other hand.