1, the pen cap is mainly made of polyester material, and the manufacturing process can be divided into molding, offset printing, assembly and other processes.
2. The pencil rod is mainly made of nitrocellulose pencil paint, ink, electrochemical aluminum foil, rubber head and aluminum hoop. The manufacturing process can be divided into pencil board, lead core, pencil rod, finished product decoration and other processes.
3. Pencil board processing: the logs are split and cut, sawed into wood blocks, and cut into pencil boards with a cutting machine after hydrothermal treatment. The plate is 184mm long, 73mm wide and 4.8 ~ 5.2 mm thick. After heating (60 ~ 120℃) and drying at high temperature (130 ~ 200℃), the pencil board becomes soft and easy to roll.
4. lead core processing graphite lead core is to prepare graphite and clay according to a certain proportion, mix them with a kneader and a three-roll machine, press them into a certain size lead core with a core pressing machine (for example, the lead core diameter of HB ~ 3h is 1.80 ~ 2. 10 mm), dry them, and heat them (50 ~150).
5. When the pencil rod is processed, the pencil board is planed into a grooved board with a thickness of 4. 1 ~ 4.2 mm and a core groove corresponding to the lead core diameter. Then the lead core and pencil board are bonded together with adhesive, heated (50 ~ 120℃) and dried 1 ~ 8 hours in a clamped state, and then processed into a certain length by a planer.
6. Appearance decoration: paint and print white pencils, cut lights, print trademarks, install glue heads, caps, etc. Make it a finished pencil with certain specifications, appearance color and pattern.