Before it is processed into a pen tip, it is a complete thin tube. Using precision instruments, three concave points are punched out at the front end of the thin tube from three directions to form the bowl seat of the ball, while the thin tube at the back forms a triangular oil groove. The ink flows out through the oil tank and is brought out by the rolling of the ball, thus completing the writing process. Needle tube type is suitable for manufacturing thinner pen heads.
Generally, there are 0.30MM and 0.25MM pen tips on the market, and the pen tip of the half needle tube is mainly between the bullet and the needle tube. The nib can be as thin as a needle tube and the tail can be as big as a bullet. The half needle tube can be used as a thinner nib, generally 0.48MM and 0.35MM nib.
Extended data:
Precautions:
1, when using a ballpoint pen, be careful not to use oil and wax to write on paper, otherwise the oil and wax will be embedded in the copper bowl of the ballpoint pen steel ball, which will affect the oil production of the ballpoint pen and make it impossible to write.
2. At the same time, avoid the impact and exposure of the ballpoint pen during use, which will affect the use time of the pen.
3. When using a ballpoint pen, avoid the impact and exposure of the pen. When not in use, be sure to cover the pen cap to prevent the deformation of the pen tip and pen holder and the oil leakage of the pen core from polluting objects.
If you don't use the pen for a long time, or when it is cold, you can soak the pen tip in warm water for a while, and then draw the pen tip on the paper, so you can write easily.
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