Do you know how to make a pencil sharpener? What are the automatic manufacturing methods of pencil sharpener? This thing, called pencil sharpener, is a necessary stationery for primary school students. As long as you turn it a few times easily, you can cut a sharp pencil tip. Let's take a look together.

first, the blade is the most important part in the production of pencil sharpener. The material used is generally high carbon steel. The steel coil is unwound by horning machine, and then sent to punching machine to cut out the original shape of the blade. The assembly hole is punched in the center of the blade and the trademark is printed. With the emergence of modern machine tools, more than 1, blades can be produced in an hour, and the efficiency is tens of thousands of times faster than that of 15 years ago. After cutting, the blade will be sent to the oven. At the high temperature of 815 degrees Celsius, the high carbon steel will be rotated and heated for 2 minutes. The heated blade will be taken out and cooled in oil. At this time, the blade will lose its luster, but it will become harder.

second, the cooled blade will be put into the hollow drum for oil dragging. The next step is polishing, which generally uses a mixture of dried corn and polishing paste. The blades are stirred for six hours by the rapid rotation of the drum, and the blades slowly regain their luster. The blades are put on with metal bars, and then all the blades are unsealed, and the blades are made. Next, the shell of the pencil sharpener is made. The main material used is usually several magnesium strips. First, the magnesium strips are cut into suitable lengths, and then the trademark is printed on the printer. Next is the opening. Drill a pencil-sized hole in the main body with a conical drill, and then drill another hole on the main body, which is where the blade is fixed.

Third, soak the pencil sharpener body with five kinds of chemical solutions, so as to make the pencil sharpener body brighter. Then, after removing the residues left by the chemical solutions by the dryer, the blade can be mounted. Using a special machine to screw the blade and the main body, these pupils' favorite pencil sharpeners are ready. The automatic manufacturing method of pencil sharpener is the above.