It is divided into two parts: pencil cap and lead holder: pencil cap decorative materials are mainly polyester materials, and the manufacturing process can be divided into molding, offset printing, assembly and other processes to complete it. Lead holder decorative materials mainly include Nitro fiber pencil Paint, printing ink, electrochemical aluminum foil, rubber head and aluminum hoop, etc. The manufacturing process can be divided into pencil plate, pencil refill, lead holder, finished product decoration and other technological processes.
Pencil plate processing will open and cut logs, cut them into wood blocks by square sawing, and cut them into plate cutting machine through pencil plate after hydrothermal treatment. Length of panel 184mm, 73mm wide, 4.8~5.2mm thick. After heating (60 ~ 120℃) drying and high temperature (130 ~ 200℃) denaturation treatment, the pencil plate can be softened and easily rolled.
Pencil refill processing graphite pencil refill is made up of graphite brickearth in a certain proportion. After kneading machine and three roll mill mixing, pencil refill of a certain size (such as HB ~ 3H pencil refill diameter 1.80~2.10mm) is extruded by core pressing machine, and heated (50~150 ℃) drying and roasting at high temperature (800 ~ 1100℃) make it have certain mechanical strength and hardness, and finally it is made by oil immersion treatment. Color pencil refill processing is similar to graphite pencil refill, but sintering is not required. There are two processing methods: brickearth talc powder, adhesive,
pigment, after the grease and wax are mixed evenly, they are made by molding and drying, which is called mixing method; The other is
china clay, talc powder. After mixing evenly, the pigment and adhesive are extruded into pencil refill or the dried pencil refill is placed in a oil core container to fully absorb grease at a certain temperature, which is called
immersion method.
Lead holder the processing uses slot shaping machine to cut pencil plate into pencil refill with a thickness of 4.1~4.2mm and a core groove suitable for the diameter of trough plate, and then uses binder to glue pencil refill and pencil plate, after heating (50 ~ 120℃) in the clamping state for 1~8 hours, the white penholder pencil with length of 178 ~ 180mm is machined through the planing rod.
Appearance decoration processing paint and white penholder printing decoration pencils, as well as cutting, printing trademarks, loading rubber head, cap of a pen and other processing, making them finished pencils with certain specifications, appearance colors and patterns.
