2. Find the button of the mechanical pencil, hold it with your finger, slowly pull out the refill, take out the refill, open the lid of the refill box, and gently take out one refill. Close the lid again, place the pencil upside down on the table, hold it firmly, and slowly put the refill in slowly. ⒉Mechanical pencils always break the lead, how to pre vent it?
First of all, correct your strength and the length of the refill. The automatic refill is a very weak wooden body. If you are not careful, it is common for the refill to break. A common meal. Secondly, because of the length of the pen core, if you play with the normal pen core and make it as long as 30 minutes, the result of the pen core breaking is obvious to all. After correcting the above two problems, the problem of mechanical pencil lead breakage will no longer occur, and you will also find that one mechanical pencil has been used for a whole semester.
In fact, the refill of the mechanical pencil is made of graphite and clay mixed in a certain proportion. These two materials have very low strength after solidification and are prone to brittle fracture. The fracture situation is closely related to the stress of the lead core. When you use a mechanical pencil, you need to hold the pencil in your hand and apply a certain amount of pre ssure before the marks appear on the paper. At this time, the pen body receives force from our hands, and the force is transmitted through the pen body to the wire extending out of the pen head.
Assume that the lead has an acting force on the surface of the paper, but the surface of the paper has a reaction force of the same magnitude and opposite direction. If you master this situation, you will be a victorious general on the field. Moreover, the occurrence of automatic pen refill breakage will also be greatly reduced. But to be honest, there are a lot of black thin pens now. You can see if that kind of pen is suitable for you. Moreover, it is not easy to break, and it is durable and has a long life.
I don’t know if this answer has helped you, but for my suggestions, I hope you can take a good look at the election. After all, this is a matter related to your studies, and the answer is for reference only.