Signage Screen Printing Q&A (57-64)

57. How does the plastic Braille signage be made?
A: Use ABS plastic pellets or PC plastic pellets, use injection molding machines and molds to inject plastic bumper signs. In order to ensure quality, it is best to have a mold temperature controller. The molds used to make high quality plastic embossed signs are now made by electroforming to ensure that the embossed surface has a high degree of finish. The injection molding machine is also highly accurate, and the computer controls the temperature, pressure, and time to ensure the quality of the injection molding.

57. How to choose hot stamping foil?
A: According to different materials, different types of hot stamping foils are used. Hot Stamping Braille plastic marking plate is commonly used in hot stamping foils, and most of them are selected by Kurz company of Germany. There are Kurz sales offices in Shanghai and Tianjin. A wide variety of hot stamping foils are available in electro-aluminum foils, chrome foils, lacquer foils, and wood-grain foils. The surface colors include electro-aluminum products such as light gold and silver, matt gold and silver, and brushed gold and silver. There are different brands, each with its own characteristics. Such as highly wearable anodized aluminum, rapidly stripped anodized aluminum, etc., suitable for different needs. In the selection of hot stamping foils, hot stamping foils from domestic joint ventures or hot stamping foils from other countries may also be used. However, both hot stamping and quality assurance must be conducted before mass production can be used.

58. How to choose the hot stamping stamping machine?
A: Hot stamping machines for Braille plastic signs include flat stamping stamping machines, hot stamping machines, and hot stamping machines that will climb the slope. There are two manual and mechanical options for flat irons. The hot stamping machine is suitable for mass production of hot stamping signs. The gilding machine, which will climb the slope, is suitable for hot stamping with curved plastic embossed signs.

59. How to choose the silicone rubber stamping Braille plastic signage?
Answer: The silicone rubber heating plate for stamping braille plastic signs has different thicknesses, such as 0.8mm, 1.6mm, 3.2mm, etc., of different specifications. Hardness is generally 70 ~ 80 ° Shore, the bottom lining is aluminum, thin, thin lines use a thin silicone rubber plate, large thick lines with thick silicone rubber heating plate.

60. What are the requirements for hot stamping plastic embossed signs on injection molded parts?
Answer: It is required that the surface of the injection molded part be clean, free of oil, and no release agent, otherwise it will affect the binding force of the hot stamp foil and plastic. In addition, it is required that the surface of injection molded parts be smooth, flat, free from pits, no lines, and no blisters.

61. How to choose the hot stamping stamping temperature, pressure and time?
A: There is a range of hot stamping temperature. To achieve a firm bond between the adhesive and the plastic parts on the hot stamping foil, it is necessary to complete the peeling of the hot stamping film. Hot stamping is the combined result of heat and pressure. The temperature, pressure and time must be well coordinated. The principle of the workpiece is not deformed. The word cannot be thickened, the line cannot collapse, and the time should be as short as possible. Stress and time.

62. How to make hot stamping metal Braille stamping?
Answer: Commonly used copper plates are deeply etched to make bronzing plates. There is a special non-powder etching machine and a special etching solution (ferric chloride solution + hydrochloric acid + side corrosion inhibitor), and the corrosion depth is 0.5-0.6 mm.
Now it is also useful to use electrolytic etching machines to make bronzing plates, and the results are good. About electrolytic etching machine, Qinhuangdao City, Baoding City, etc. are available for sale.

63. How to make hot stamping on the surface of hot stamping plastic embossing?
A: PC plastic convex surface, high-speed cutting can be used diamond tools, processed diagonal. The thickness of the texture is related to the geometric angle of the diamond tool. After the diamond cutter cuts the surface of the plastic embossed surface, it can be stamped with electro-aluminum foil and a hot stamping machine.

64. What are the quality requirements for stamping plastic Braille tags?
A: The appearance quality requires clear and complete writing, straight lines, clean surfaces, uniform color, no discoloration, and no blisters, blisters, etc., that affect the appearance of defects.
Regarding the intrinsic quality requirements, different users have different requirements. Generally, such requirements as bonding force, abrasion resistance, ethanol resistance, salt water resistance, surface hardness, and heat resistance can be checked and determined according to the user's corporate standards.

Source: China Screen Printing Technology Professional Network