Signage Screen Printing Q&A (30-56)

30. What are the methods for coloring aluminum signs and panel oxide films? What are the types of dyes?
A: Oxide film coloring commonly used dyes are acid dyes, reactive dyes and dyes such as Yindi. There are two methods of dyeing: dyeing and dyeing. Printing and dyeing are subdivided into infiltrated printing and disperse dyes. After printing, they are heated and sublimated into the oxide film.

31. What are the methods of aluminum oxide plate and panel oxide sealing?
Answer: 1. Boiling distilled water sealing method;
2. Pressure steam sealing method;
3. Nickel salt, cobalt salt sealing method;
4. Mechanical white oil sealing hole method;
5. Room temperature sealing fluid, closed oxide film is a new material.

32. What are the commonly used chemical polishing and electrolytic polishing solution formulations?
A: Chemical polishing solution: 78% phosphoric acid, 11% nitric acid, and 11% sulfuric acid.
Electrolytic polishing solution: 1 phosphoric acid 78%, chromic anhydride 22%;
20% phosphoric acid, 10% glycerol.

33. What methods are commonly used for aluminum oxidation to produce signs and panel aluminum surface treatment?
Answer: 1. Sandblasting method: Use mineral sand or river sand.
2. Scrubbing method: The round copper wire brush rotates, and the aluminum surface on the conveyor belt can walk forward and left and right to get the sand surface.
3. Scrub method: Off-grinding machines that are eliminated by offset printing are also used to grind aluminum plates. However, they must be washed with water continuously to obtain fine-glossy sand surface effects.
4. Chemical sand surface treatment: There is a monopoly chemical sand surface treatment agent, through the chemical treatment, to obtain the effect of sand surface aluminum plate, requiring the aluminum plate crystal fine and uniform.

34. What is the current progress of aluminum oxidation signage process?
Answer: There are rapid oxidation method, electrolytic coloring method, infiltration and sublimation printing and dyeing method, low temperature sealing method, second oxidation electrophoretic paint replacement method, and different oxidation power supply.

35. What chemical materials are commonly used to make aluminum oxidation signs?
A: Metal degreasing agent, sulfuric acid, phosphoric acid, nitric acid, chromic acid, caustic soda, acetic acid, acid dyes, reactive dyes, penetrant and sublimation inks for printing, anti-blasting ink, resist ink, glycerine, boric acid, nickel acetate, Trisodium phosphate, sodium carbonate, insurance powder, tannic acid, etc.

36. What is the production situation of aluminum oxidation signs at home and abroad?
A: Shanghai No. 12 Machine Tool Plant has introduced a set of aluminum oxidation signage production lines from Japan. It mainly uses secondary oxidation methods to produce machine tool signages. Many professional sign manufacturers also have aluminum oxidation process equipment. Apart from Japan, South Korea also excels in the production of aluminum oxidation signs. In South Korea, a manufacturer named Fulin Yanghang exhibited many new aluminum oxidation signs at an exhibition in Beijing. In particular, multi-color printing and etching and etched signs did a good job. They were mainly used in entertainment venues and were very popular.

37. What is a high cursor?
A: The convex surface of aluminum and copper is cut with a diamond tool to obtain a high-finish surface. The sign made of this is called a high-angle sign.

38. How to make embossed words on aluminum and copper plates?
A: There are three methods for producing embossed characters: first, thick aluminum plates are used to press out embossed patterns with punches and punches, and secondly, thin aluminum plates are used to draw out the embossed words using punches and stamps, and the third method is etching. The embossed words are etched on aluminum or copper plates. In recent times, there has been a method of die casting high-browser embossed characters.

39. How is the background color of the aluminum and copper braille high-cursor cards produced?
Answer: The background color of aluminum can be used in different situations, such as spray painting, oxidation coloring, offset printing and screen printing, and film dyeing.
Braille copper background color is generally made by painting and filling paint.

40. Does the surface of the high-lighting high-gloss cutting need to be protected?
A: The aluminum surface after high-light cutting does not need to be protected because the surface after high-speed cutting has a layer of oxide film that can maintain its long-term luster. After the high-cutting copper surface needs protection, it is easy to rust and lose its luster. The protection method is to spray clear varnish or apply crystal glue, and bright NiCr or gold can also be plated.

41. What is the principle of high-light cutting?
A: The cutting edge of the diamond cutting tool is sharp, highly wear-resistant, and high in hardness. The surface that it processes is smooth and bright. When the diamond cutter is cutting, the built-up edge is not formed at the cutting edge, and the chips are easily removed, so that the brightness is guaranteed.

42. What machine tool is used for high-light cutting?
A: You can use lathes, milling machines, milling and milling machines, or special high-gloss machine tools, which require the machine to have good precision, low vibration, and smooth rotation. Special cutters with different diameters are required.

43. What are the geometric parameters of high-cut diamond cutting tools?
A: The commonly used parameters of diamond tools are: 120°, 140° of tool tip angle, 0～5° of rake angle, and 3～6° of relief angle. When purchasing and processing tools, they should be discussed with tool makers. Generally, they are rich. Experience will use geometric parameters that are more suitable for use.

44. Where to buy diamond tools?
A: Shanghai, Tianjin, and Wuxi all have special diamond tooling factories that can purchase their products. They can also use blunt tools to allow them to grind them. They can also buy diamond tools imported from Japan through foreign companies.

45. What should you watch out for when using diamond tools?
Answer: 1 The tool is clamped positively and smoothly, and the workpiece must be clamped positively, flatly, tightly so as not to damage the tool.
2 The knife depth should be small, about 0.1mm, to prevent the knife from being damaged by the knife too deep.
3 To turn on the knife after starting the machine, stop after the knife is retracted.

46. ​​How to obtain a twill and checkered surface when cutting?
Answer: The size of the cutter head and the position of the workpiece should be selected to obtain the ideal twill, and the thickness of the texture is related to the angle of the tool tip. To get a square grid, the workpiece is cut once before and after the cutter head.

47. What is the process of high-gloss cutting labels?
A: 1 bottom layer processing → stamping molding → high light cutting (draw)
2 stamping molding → bottom treatment → high light cutting (cold extrusion)
3 Etching Emboss → Underlayer Processing → High-Light Cutting (Etching)

48. How many signs can a diamond cutter process?
Answer: Take the TV trademark as an example: cutting and printing convex signs can reach more than 50,000 pieces, and cutting aluminum oxide coloring marks is about 1 to 20,000 pieces of tools. If it is not sharp, it should be sent to the diamond tool factory for repair.

49. How is the embossed sign fixed during cutting?
A: After cutting on a lathe, you can make a disc clamped on the chuck, flatten the surface, and then affix the label on the side of the disc with double-sided tape.
Processing and cutting on the milling machine can be fixed with flat pliers, or a vacuum sucker can be used to fix the plate.

50. When stamping embossed signs, the thickness is inconsistent, how high-cutting?
Answer: A hard alloy roughing tool should be added to the cutter head to cut and level the tool first, then the diamond tool is cut. This also protects the high-light tool from damage, and the hardness alloy tool also plays a balancing role when the cutter head rotates.

51. How to fix the high cursor on the whole machine?
A: In order to integrate well, you should use high-quality Nitto 500# double-sided tape. Or squeeze out two legs behind the extruded embossed sign to fix it after perforation.

52. Is it possible to screen-print the surface of highlights?
Answer: Yes. Seeing such signs abroad, there is a transparent red ink printed on the embossed surface, which is also very beautiful.

53. What are the new uses for high-gloss cutting?
A: Use different cutting tools and machine tools to process bright lines, bright edges and bright holes on the signage panel. It is also useful for vertical machine tools to do special tooling on the work surface to engrave various patterns and patterns on the workpiece.

54. What are the types of commonly used diamond tools?
A: Two kinds of flat knife and sharp knife are commonly used.

55. What are the advantages of hot stamping and what are the uses?
A: The current hot stamping signs are different from the past hot stamping signs. The quality has been greatly improved, the surface is very smooth and smooth, the lines are straight, see the corners, do not collapse, show the modern finishing technology, there is a modern . Hot stamping foils are also available in many varieties, including bright gold, bright silver, gold, silver, brush, chrome foil, and pigment foils. Hot stamping signs are used on modern home appliances and instruments.

56. What plastic is used to make plastic Braille signs?
Answer: Commonly used ABS plastics, it is a copolymer of styrene, butadiene and acrylonitrile. Because it has good mechanical strength, it is often called engineering plastics. Another common plastic is PC plastic (polycarbonate), which is more suitable for making high-quality hot stamping signs.