Parting surface is moving, or module interface, also open the mold to take out the plastic parts or pouring system of material surface. When design the plastic molding mold, the design of parting surface selection is an important content, the parting surface selection is reasonable, the die structure is simple, easy to forming, and plastic pieces of high quality. If points type selection is not reasonable, the structure of the mould is complicated, plastic molding difficult, and the quality is poor, therefore, the selection of parting must give enough attention.

The parting surface representation method are:

1). Each separate

2). One-way separately

3). Order separately

The parting surface classification are as follows:

1). According to the number of the parting surface, a single parting surface, parting surface and three points type surface.

2). According to the relation with the direction of the open mold parting surface, with open mold direction parallel to the parting surface, mould opening and the main direction of vertical parting surface, and mould opening direction with a certain Angle of inclined parting surface, etc.