The application of laser technology in modern plas

Application of laser technology in modern plastic processing (Part 2)

compared with carbon dioxide laser, Yage laser is more flexible, and it is easier to master the operation of changing the sign shape and font. Another advantage of the laser is that it can produce high-precision marks, so it is suitable for occasions requiring high-quality marks, such as electronic connectors and medical instruments. At present, the latest equipment can also depict two signs at a time, which greatly improves the production efficiency. The YAG laser can emit 1.064 μ M, but the average cost of a complete Yage laser transmitter is twice that of a carbon dioxide laser

marks made by neodymium yttrium aluminum garnet laser emitting device on nylon 11

the current laser marking equipment is completely controlled by computer, which usually allows the operator to change commands in the production process, and its linear speed can reach 1000mm/s

formula

what people need is often the laser logo that is more obvious than the surrounding environment, so the formula designer must be familiar with how to combine resin, additives and laser devices to get the best effect. Because different additives will produce different effects in specific laser devices, some additives will cause unnecessary discoloration or decline in physical properties. For example, phyllosilicate and mica have the best marks on carbon dioxide laser emitting devices, while antimony oxide can achieve the best effect on Yager laser emitting devices. Therefore, plastic processors must know the performance and shortcomings of the additives they use in the process of laser marking

because most plastics contain some other additives, such as plasticizers, stabilizers, flame retardants, release agents, antistatic agents, pigments, etc., it is also necessary to ◎ fixtures: we recommend using a 3-point zigzag loading device to evaluate rigid and semi-rigid materials. At the same time, the support span (size) of the sample is related to the thickness of the sample. It is necessary to test the impact of these additives on laser marking additives. The existing additives in the resin sometimes enhance the laser mark, but sometimes weaken it

in addition, the resin formula for laser marking may also contain other additives such as glass fiber, colorant, flame retardant, etc., so processors can choose special mixing services and require formula researchers to mix these additives in the best combination, accounting for more than 15% of the materials used in the whole vehicle, so as to achieve the best comprehensive performance. Generally speaking, polyamide, polypropylene and polycarbonate resins should be especially considered

if the processor needs to add the laser marking additive directly to the resin particles, it is generally recommended to add the coupling agent to the surface of the resin particles. This table is the experimental requirements of the gas spring of various models, so as to avoid the separation of the resin and the additive. In addition, when considering the use performance, we should first participate in the drafting of 2 international standards and 4 national standards to understand the safety performance of all laser marking additives. This is particularly important if the final product will be used in food or medicine

-- Jiagong electromechanical