history of the invention of graphite pencils is rooted in the distant sixteenth century, when the English shepherds found in the ground not far from his village a strange black mass, which is very similar to coal, but for some reason does not want to burn.Soon, the new material is still found application - from him began to make thin sticks that can be used for drawing, as they left a good clear traces on canvas or paper.However, these sticks are not widely used because they were not very practical: they often broke and soiled fingers.That changed only when in 1863 in Germany, the world's first wooden pencil was made, the form of which has hardly changed over the centuries and preserved to this day.
How do pencils
production process on the modern pencil factory consists of dozens of separate technological operations.For the manufacture of a pencil used about a hundred different kinds of consumables, and the time it takes at least ten days.
What made pencil
main materials for the manufacture o
The second, equally important component of each pencil - a wooden shell reliably protects the stem from mechanical damage, and our hands - from the graphite dust.Not every timber is suitable for such a responsible matter.Pencils are made only from alder, basswood, pine and cedar.
how to make a pencil: pencil production
production of any pencil begins at a sawmill where the timber is cleaned of bark and make lumber.Then short cut lumber pieces, each of which is then sawn into boards of given thickness.
Planks sort, cull non-standard, stacked appropriate, and load them into the autoclave.There plank finally dried, and then impregnated with paraffin.
thus prepared tablets coming next plant wherein they are passed through a complex machine that simultaneously grinds the surface and makes them therein with one side parallel to the long and thin grooves.These recesses are subsequently stacked rods future pencils.
Meanwhile, in another workshop has made writing rods.Make a mixture of graphite and clay are pulverized into superfine powder.The powder is then mixed with water and formed into bars, forcing the resulting "dough" through thin openings at special stamp, about the same as making spaghetti.Then dried semifinished bars, after which they were baked at a temperature of about one thousand degrees in a special electric furnace.
After annealing bars impregnated with fat.This is done so that the rods could then write.
Finished rods are sent to the assembly plant, where the machine will stack them in already carved grooves in the plank, and then will be placed on top of the second plank smeared with glue so that the edges of the grooves at the top and bottom of exactly the same.The resulting pencil "sandwiches" are stacked and pull together their clamps to glue good "grab" and the two halves tightly adhered to each other.
Pile dried for several hours at a temperature of 40 degrees, then remove the clamps and plates are transported to the machine that they have already divided into individual pens.There's also the usual pencils will give us a round or hexagonal shape, and will shorten the ends neatly.
Ready "naked" pencils then go for painting.To new pencils were Gorny and shiny, their color not once, but three or even four times, and then a few more times lacquered.Also in the paint shop to be marked with pencil and logo of the company.
bright, shining, smelling of fresh paint pencils transported to the packing workshop, where they were laid out on cardboard boxes, which are then packed into large boxes and sent to stores.