In general, plastic molding parts work size respectively referred to as the cavity size, the size of the core size and center distance, the three types of size, respectively, using three different methods to design and calculation.
1. Products using one-way negative deviation of dimension, the basic size for maximum; And at the same time of the cavity size by ChanXiangZheng deviation, basic size to the minimum.
2. The products on the inside size using ChanXiangZheng deviation, the basic size of the minimum; And at the same time of the cavity size using one-way negative deviation, basic dimensions for the maximum.
3. The products and the center distance on the mould adopts two-way equivalent positive and negative deviation, the basic size is average.
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