There are "white area", "yellow area" "black area" in EPC field. The "white area" is the site the shaft sleeve castings pre foaming, molding drying of the foamed plastic beads are made. The ingredients of the coating, mixing, brushing (dip coating) drying are called "yellow areas". The box molding, melting, pouring shakeout, casting out are called "black areas", the shaft sleeve castings manufacturers are "white area", "yellow area" to "black area", all links are closely related. Each link has corresponding technical points.

(1) Manufacturing technology of foam mold

① Lost foam casting process design of shaft sleeve casting manufacturer; ② mold design; ③ mold maintenance.

(2) Pattern making technology

① The pre foaming process of particles; ② mold forming (autoclave forming); ③ arrangement combination in pattern pouring system.

(3) Coating coating preparation technology drying

① Paint selection formula; ② paint mixing; ③ paint application, coating control; ④ coating drying; ⑤ waiting for the mold coating drying.

(4) Micro vibration solid modeling technology

① Selection of vibration table; ② vibration parameters; ③ key points of molding operation technology.

(5) Negative pressure pouring technology

① Selection of vacuum pump parameters vacuum coefficient; ② improvement of filtration technology; ③ selection of negative pressure range; ④ design of pouring parameters.

(6) Desanding cleaning

① The control of the open box heat preservation time of different alloy castings; ② cleaning, inspection warehousing; ③ analysis solution of defects waste products in time.