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Pencil Characteristic

The second feature of the pencil is that sometimes we have to stop and cut it with a pencil. Although this will make pencils suffer, but after the cut, it will become more sharp. So children, Pencil you must learn to endure pain and sorrow, because they can make you a better person. "

The third feature of the pencil is that it always allows us to use eraser to erase the error. That is to say, it is not a bad thing to correct some of the wrong things we have done. Pencil It can help us take the right path. "

"The fourth feature of the pencil is that the really useful is not the appearance of a beautiful pen, but inside the lead, so pay attention to your inner world.

Finally, in any case, Pencil it will always leave its own imprint. The same reason, Pencil you should also understand that in the life of the journey, you do anything will leave a mark. So, in the future no matter what you do, we must first consider the consequences. "

Now the pencil does not contain lead, but made of graphite and clay, Pencil the reason why this is called, is due to its historical evolution caused.

Ancient Greece and Rome have made lead rods of metal pencils. They are mostly conical, with other objects after leaving the traces of lead, used to mark the mark.

In the 14th century, there was a similar pencil in Europe.

In 1565, the United Kingdom began to graphite as a refill, Pencil hand-made the most original wooden pencil.

In 1662, Germany built the world's first pencil factory.

1790 ~ 1793, the French Kant used clay will be made of graphite refills, laid a modern pencil industrial base. In the pencil pen on the usually have a hardness mark, h said hard pencil, Pencil the greater the number of the front of the greater hardness: b that soft pencil, the front of the larger number of the more soft core. Hb is a soft and hard pencil, suitable for daily writing purposes.

Divided into pencil cap and pencils in two parts: pencil cap appearance of the main decorative materials for the polyester material, the production process can be divided into mold, Pencil offset, assembly and other processes to complete. Pencil poles The main decorative materials are nitrocellulose pencil paint, printing ink, foil, rubber and aluminum hoop, and so on. Production process can be divided into pencil panels, Pencil lead, pencils, finished products such as decorative process. Pencil plate processing will open the wood, cut off, open the side saw into a wooden block, after the heat treatment by cutting machine into a pencil plate. Plate length 184mm, width 73mm, thickness 4.8 ~ 5.2mm. And then heated (60 ~ 120 ℃) dry and high temperature (130 ~ 200 ℃) denaturation treatment, Pencil so that the pencil plate to soften the degree of easy to roll. The lead core processing graphite lead is made of graphite and clay according to a certain proportion, the kneading machine, three-roll machine after mixing, through the pressure die extrusion of a certain size (such as HB ~ 3H lead diameter of 1.80 ~ 2.10mm) lead, Pencil by heating (50 ~ 150 ℃) drying and high temperature (800 ~ 1100 ℃) roasting, it has a certain mechanical strength and hardness, and finally made by oil immersion treatment. The color lead is similar to graphite lead, but does not require sintering. There are two kinds of processing methods: one is clay, talc, adhesives, colorants, greases and waxes and other mixed evenly after forming, drying and made, known as the mixing method; the other is the clay, talc , Pigment and adhesive, Pencil etc. are mixed evenly after extrusion into lead or the dry lead core placed in the oil core container, at a certain temperature to make it fully absorb grease and made, known as oil immersion method. The pencil bar is machined with a pencil planer and cut into a groove plate with a thickness of 4.1 to 4.2 mm and a core groove adapted to the diameter of the lead core. Then, Pencil the adhesive is used to bond the lead and the pencil sheet together. (50 ~ 120 ℃) after drying for 1 to 8 hours, the workpiece was machined into a white rod pencil with a length of 178 to 180 mm. The appearance of decorative processing will be white pole pencil paint and printing decoration, and cut light, print trademarks, rubber and other processing, Pencil and finally fitted with pencil cap, making it a certain size, appearance color and pattern of finished pencil.


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