Bearing housing

1) Determination of the manufacturing process
Casting mechanism and analysis of its casting process, the bearing housing is used to clamp the bearing, thus supporting the shaft and the parts on the shaft.
The weight of the casting is about 10Kg
Parts material is HT200
Outline size (215X80X146)mm
Production program: mass production
2) Due to the small casting, it is advisable to use a veil and a wet type with a back yarn.
3) Modeling method: whole mold, live block, two-box model
4) Determination of the parting surface
The whole shape of the bearing seat is divided into sections, and wood is used as the sand core of Φ62.5, and basically all are in one plane. Therefore, the entire shape of the bearing is selected as the parting surface, so that the entire cavity is in the down shape, so that The type is also easy to safely pour the riser.
5) Determination of the location of the riser
The casting part is HT200, the volume shrinkage rate is small, but the casting part is a thick solid part, so attention should be paid to the occurrence of shrinkage hole defects, so the position and direction of the introduction of the inner runner is very important, according to the structural characteristics of the casting, the orientation is adopted. The principle of solidification, the inner runner should be introduced from both ends of the base, so as to prevent the sand type of Φ62.5 from being damaged, and the contact hot runner can be reduced by pressing the gate of the press edge, that is, the contact hot section of the gate and the casting can be reduced. Moreover, the overheating of the thick portion in the middle can be avoided, and the solidification time can be shortened, which is advantageous for obtaining qualified castings. In addition, since the crimping gate has a good feeding effect, the casting member does not need to be provided with a feeding riser to prevent the generation of the pores. An venting position of Φ8-Φ10mm can be set at the position of the top middle edge.