Surface treatment process

1. Brushed metal

Metal wire drawing is a surface treatment method that forms lines on the surface of the workpiece by grinding products to achieve a decorative effect.

2. Shot peening

Shot peening is a cold working process that uses pellets to bombard the surface of the workpiece and implant residual compressive stress to improve the fatigue strength of the workpiece.

3. Sandblasting

Sand blasting is the process of cleaning and roughening the surface of the substrate by the impact of high-speed sand flow, that is, using compressed air as the power to form a high-speed jet beam to spray the blasting material (copper ore, quartz sand, emery sand, iron sand, Hainan sand) at high speed To the surface of the workpiece to be processed, the appearance or shape of the outer surface of the workpiece surface is changed.

4. Etching

Etching is a technique in which materials are removed using chemical reaction or physical impact. Generally referred to as etching is also called photochemical etching, which refers to the removal of the protective film of the area to be etched after exposure to plate making and development, and contact with chemical solutions during etching to achieve the effect of dissolving and corroding, forming unevenness or hollowing out.

5. Laser carving

Laser engraving is also called laser engraving or laser marking, which is a process of surface treatment using optical principles. The laser beam is used to carve a permanent mark on the surface of the material or the inside of the transparent material.

6. EDM

Electric discharge machining (EDM) is a special machining method that uses the electric erosion effect generated by the pulse discharge between the two electrodes immersed in the working fluid to ablate conductive materials. It is also called electric discharge machining or electro-erosion machining, abbreviated as EDM in English. Tool electrodes are commonly used electro-corrosion resistant materials with good conductivity, high melting point and easy processing, such as copper, graphite, copper-tungsten alloy and molybdenum. During the machining process, the tool electrode is also lost, but it is less than the amount of metal erosion of the workpiece, and even close to no loss.

7. Pad printing

Pad printing is one of the special printing methods. It uses steel (or copper, thermoplastic) intaglio plates and uses a curved pad printing head made of silicone rubber materials to dip the ink on the intaglio plate onto the surface of the pad printing head, and then Text, patterns, etc. can be printed on the surface of the desired object with a single press.

8. Screen printing

Screen printing is to stretch silk fabric, synthetic fiber fabric or metal mesh on the screen frame, and use the method of hand engraving paint film or photochemical plate making to make the screen printing plate. Modern screen printing technology uses photosensitive materials to make a screen printing plate (make the screen holes of the graphic part of the screen printing plate through holes, and the screen holes of the non-graphic part are blocked. live). During printing, the ink is transferred to the substrate through the mesh of the image and text by the squeeze of the squeegee, forming the same image and text as the original.

9. Direct thermal printing

Direct thermal printing refers to applying a thermal agent to the paper to make it a thermal recording paper. The thermal recording paper changes the physical or chemical properties of the substance (color developer) under the action of heat to obtain an image One way.

10. Heat transfer

The principle of thermal transfer is to print a digital pattern on a special transfer paper with a special transfer ink through a printer, and then use a special transfer machine to accurately transfer the pattern to the surface of the product at high temperature and high pressure to complete the product printing. system.

11. Lithography

As the graphic part and the non-graphic part on the lithographic printing are on the same plane, in printing, in order to make the ink distinguish the pattern part from the non-pattern part of the printing plate, the principle of separation of oil and water is used. The water supply device of the component supplies water to the non-graphic part of the printing plate, thereby protecting the non-graphic part of the printing plate from being wetted by the ink. Then, the ink supply device of the printing part supplies ink to the printing plate. Since the non-graphic part of the printing plate is protected by water, the ink can only be supplied to the graphic part of the printing plate. Finally, the ink on the printing plate is transferred to the nipple, and then the pressure between the squeegee and the impression cylinder is used to transfer the ink on the nipple to the substrate to complete a printing. Therefore, lithography is a kind of Indirect printing method.

12. Curved printing

Curved printing is to put the ink into the intaglio with engraved characters or patterns, then copy the characters or patterns onto the curved surface, and then use the curved surface to transfer the characters or patterns to the surface of the molded product, and finally make it through heat treatment or ultraviolet light irradiation. The ink is cured.

13. Hot stamping

Hot stamping, commonly known as “hot stamping”, refers to hot stamping text and patterns of materials such as colored foil on the front or back cover of the hardcover book cover, or embossing various embossed book titles or patterns by hot pressing. .

14. Water transfer

Water transfer printing is a kind of printing that uses water pressure to hydrolyze the transfer paper/plastic film with color patterns. The technological process includes the production of water transfer decal paper, decal soaking, pattern transfer, drying, and finished product.