Thimble is one of the most important mould accessories. So, what is the best material to use for the mold thimble?
Mould thimble generally adopted high speed steel, after heat treatment is required. The current brand many, commonly used have SKD61, SKH51. Its hardness in 50-55 degrees. Surface hardening and nitriding treatment. There is also a kind of common high speed steel thimble, used in place of request is not high. Thimble market prices vary considerably, famous manufacturers price is higher, the dongguan male scene hardware model provide mould thimble is cheap and fine.
Die thimble breaks easily during die stamping. What is the reason? Zhuochang mold accessories for your analysis
Broken needle must be stamping resistance is too large, beyond the mold thimble bearing limit. Firstly, check whether the hardware has strain and deformation, and improve the slope of the mold. If there is still no improvement, change from the die thimble, such as increasing the diameter of the die thimble, or adopt the better material SKD61 heat treatment for the die thimble. As well as can improve from the craft aspect and so on consideration.
The thimble ejector was really a ~ just met when doing the mold to design the deeper the pillars of fear at the top of the ejection time not to come out, enough (location design general thimble), ejector pin will be used to solve the problem ~ which the ejector in the mold and moving thimble, and middle of ejector, and a small needle, that was a ejector pin, it is not moving, general fixed to the floor. The drum is generally lower than the PL surface of the mold.