(1) Process introduction.
Indentation refers to the use of steel wire, through embossing, to press out marks on the paper or leave groove marks for bending.
Steel knives and steel wires are arranged into templates, and the surface of the printed matter is processed into traces that are easy to fold under the action of pressure.
For paper over 200g, even including 157g of single color ink with very thick prints, when it needs to be folded, cracks often appear at the folding, which affects the quality of the printed product. It can be solved by indentation.
2) Process principle.
1) Periodic indentation is due to the presence of protrusions in the finished hole or the front hole of the finished product, the straightening roller, the moving guide plate of the outlet roller, the guide roller, etc.;
2) The foreign body falls on the rolled piece and falls off after rolling;
3) The product is pressed against hard objects or the product itself is pressed against each other during transportation and storage.
3) Process application.
Printing industry: indentation can be applied to paper, packaging materials, gift boxes, etc., to increase the texture and aesthetics of products, and enhance the added value of products.
Leather goods: Indentations can be used to make leather goods such as belts, wallets, shoes, etc., adding to their uniqueness and artistic sense.
Home decoration: indentation can be used on the surface of furniture, walls, floors, etc., to increase the decorative effect and make the product more artistic and three-dimensional.
Automotive interior: Indentation can be applied to interior parts such as car seats, steering wheels, and dashboards to enhance their comfort and sense of luxury.
Electronics: Indentation can be used on electronic product parts such as mobile phone cases, laptop cases, keyboards, etc., to enhance the texture and appearance of products.
Cosmetic packaging: Indentation can be applied to cosmetic packaging boxes, bottles, etc., to increase their sense of quality and uniqueness.
4) Professional vocabulary.
1) Indentation hardness
Definition: Indentation hardnessThe hardness of the indentation is evaluated by the indentation depth or the area of the indentation surface when the indentation is pressed into the surface of the material under a specified static test force. Hardness refers to the ability of a material to resist the intrusion of external mechanical forces such as engraving, pressing, grinding, etc. As early as ancient times, human beings had an understanding of the hardness of materials--- and the people of the Stone Age chose stones with high hardness to make hunting tools.
In 1822, the Austrian mineralogist Friedrich Mohs (1773-1839) established the Mohs hardness scale using scratch testing. This scale is the use of talc, gypsum, calcite, fluorite, apatite, orthoclase 10 minerals carved with each other, quartz, topaz, corundum and diamond ten kinds of minerals, leaving marks on the minerals indicate low hardness, according to this method to set the degree of hardness as 10. Subsequently, in 1900, the Swedish metallurgist Johan August Brinell (1849-1925) proposed the Brinell hardness test method at the Paris International Exhibition. This test method uses a very hard standard steel ball to press a certain load into the surface of the test piece, so that the test piece leaves a spherical indentation. At this time, the added load is divided by the spherical surface area of the indentation, and the quotient obtained is the Brinell hardness. After Brinell proposed the Brinell hardness, Rockwell, Vickers, Knoop and others also established other hardness standards using indentators with different geometries such as cones, triangular pyramids, etc. Brinell, Rockwell and Vickers hardness are widely used hardness test standards in the industry.
2) Depth of indentation
Definition: Indentation depth is the distance from the surface of the weldment to the bottom of the indentation. The measurement of the indentation depth uses a unique automatic zero-alignment table, which eliminates the measurement error caused by manual zeroing. The application, holding, and removal of the total test force are automated, eliminating errors caused by manual operation.