After trimming process make triangle mei triangle product size is smaller, the more complex topography, the difficulty of the trimming is higher, more waste. By mastering technology means and methods of cultivation is a xiao way to save costs. Trimming process is the guarantee of triangle, neat appearance, beautiful necessary process, but the trim is often time-consuming, Labour, for strict product, taken when trimming that may waste time, is so need to be treated with caution. Triangle method of manual trimming zui, original. Low efficiency and difficult to guarantee the quality, especially for complex configuration, the product with high precision is hard to be thorough, in the net, and it's easy to damage and product ontology connects to the edge of the overflow. In order to improve the quality of xiao rate and, in the mechanical trimming. Common is special trimming electric machines with rotating blades. Mechanical machining accuracy than manual beveling, efficiency has doubled, particularly for more than a mold cavity of the product, can according to the arrangement and distribution of products, designed to match the cutting tool. The mechanical processing precision than manual beveling, efficiency has doubled, particularly for more than a mold cavity of the product, can according to the arrangement and distribution of products, designed to match the cutting tool.