一、要便于制造模型、芯盒和造型：

First, to facilitate the manufacture of models, core boxes and styling:

1)小型混合机、 U形混合机铸件的内腔应该力求铸造时不用或少用型芯，当采用型芯时，应该方便其支撑、固定及排气出砂，必要时应该设有足够的工艺孔;

1) small cavity mixing machine, U type mixing machine castings should be less or no core to cast, when the core, should facilitate its support and fixation and exhaust out of the sand, when necessary, should be equipped with adequate technological hole;

2)对于铸件内外侧面及加强肋等结构，应该在起模方向设有一定的结构斜度;

2) there shall be a certain structural inclination in the direction of the die for the structure of the inner and outer sides of the casting and the stiffeners;

3)铸件上的凸台部分与铸件本体不应该相差过大，最好取同一高度，同一面上的距离较近的几个凸台，最好连成整体的凸起部分。

3) the projection part on the casting shall not be too different from the casting body, so it is better to take the same height, and a few convex columns with the same distance on the same side, preferably the whole raised part.

4)铸件的外形应该力求简单，以便于起模，应该尽量使铸造分型面为平面，且数目最小;

4) the shape of the casting should be simple, so as to facilitate the die casting, the casting parting surface should be as flat as possible, and the minimum number;

二、要减少产生铸造缺陷的倾向：

Two, reduce the tendency to produce casting defects:

1)应该尽量避免铸件内具有大的水平面;

1) the large surface of the casting shall be avoided as much as possible;

2)铸件平面壁上的铸孔，应该用凸边加固，以减少壁厚;

2) cast hole casting plane wall, should be used to reduce the thickness of flange reinforcement;

3)铸件结构应该尽可能使其冷却时能无阻碍地收缩;

3) the casting structure shall be as free as possible to allow it to shrink without cooling when it is cooled;

4)铸件内水路、气路等大面积的夹层腔，应该有若干连接柱。

4) a large area of sandwich cavities, such as water, air and road, shall be provided with several connecting posts.