The production of copper clad plate is mainly completed through four processes.
The first: glue, that is, the synthesis and preparation of resin glue. Resin glue is manufactured in a reaction kettle. The manufacture of resin gel for phenolic paper - based coppers usually begins with the synthesis of resin. All kinds of chemical raw materials according to different proportions of the first stage of the resin, and then in the reaction kettle to add other additives, solvents, etc., to prepare, finally made can be directly used in the second process of the resin glue (overseas it is called Fanali water, resInvarnish). The glue making process is the most important process in the production of copper clad plate. It is based on the theory of organic chemistry, chemical engineering, safety engineering and so on, and is the most technical process.
Second: gluing, that is, semi-finished materials, impregnation, drying, cutting. Will make good resin adhesive solution through the diaphragm pump into the glue tank of gluing machine, with insulation wood pulp paper, fiber paper or glass fiber cloth (electronic cloth, glass fiber paper as the reinforced material, such as copper foil for fabric, impregnated or coated with resin adhesive fluid respectively, and then through gluing machine oven, under the condition of 120 ~ 180 ° C heating dry, remove the solvent, resin is curing condition, After cutting, the semi - finished products, also known as semi - cured pieces. The technical workers of the gluing process need to have professional knowledge of safety engineering, electrical automation, mechatronics, heat and combustion, and supplemented by basic chemical knowledge, which is the key process of copper clad plate production.
The third way: pressing and shearing, that is, stacking multi-layer semi-solidified sheet is made of copper clad sheet wool by hot pressing machine, and the copper clad sheet is made of copper clad sheet wool by automatic shearing line. Before pressing, it is necessary to batching the semi-cured tablets. According to the order requirements, different number of semi-cured sheets are prepared as hot-pressed blanks. The blank and stainless steel plate are placed between the heating plate of the press, and the laminating process is carried out under high temperature and high pressure according to the technological requirements. Laminating process is completed through several different process control stages of preheating, hot pressing, cooling and plate unloading. High temperature, low temperature, hot pressing time is too long, too short, will have an important impact on product quality. Therefore, this process involves more complex industrial engineering, PLC automation control, hydraulic technology, fluid mechanics, air pressure technology, cooling technology and other advanced manufacturing technology.
Fourth: plate inspection and packaging, that is, to shear completed copper clad plate inspection and packaging. Conduct a full inspection of the copper clad products, divide them into different grades according to the inspection standards, and pack them airtight by baler for shipment. Copper clad products have high requirements for storage environment, and all downstream circuit boards should be put into production line after unpacking. Exposed to the air, the copper foil surface will be oxidized, and because of air humidity and temperature changes, will affect the internal performance of the product, and then affect the quality of the product.
Safety production and quality control run through the whole process of copper clad plate production.
Copper clad plate products belong to capital-intensive and technology-intensive industries, and the safety and environmental protection supervision is very strict. The market fluctuation cycle is large and lasts for a long time, and the industry threshold is high and the risk is big. At the same time, practitioners are required to have a strong craftsman spirit, in order to produce high-quality products.