Shoot core machine, shell core mechanism of core/shell mold manufacturing method

Skip and blowing sand method. Skip method is suitable for the shell mold production, while blowing sand method used for shell core production. Sand blowing method can be divided into the bottom blowing shell core machine type and item type two kinds big. Bottom blowing type core shell core mechanism, core sand from blowing at the bottom of the core box, the blowing pressure of 0.4 ~ 5 mpa, blowing sand for 15 ~ 35 s. Owing to the core sand blowing at the bottom of the core box, fill is ideal as basic type, is generally applicable to simple shell core shape. Ld type core shell core mechanism, core sand blowing in from core box top filling condition is good, but the machine has complicated structure and commonly used in more complex shell core manufacturing structure, the blowing pressure of 0. L ~ 0.3 MPa, blowing sand time is 3 ~ 8 s. Shell core manufacturing process is as follows: the core box heating to 210 ~ 250 ℃, blow into the coated sand, the resin coated sand at this time after heated to melt, crusting, flip 180 DHS, make the core box automatically from side to side several times, emissions from not cured sand, skip reset, continue to hardening of the core/shell type 2 ~ 3 min, can good core/shell mold ejection system.