The relationship between the dimensions of the stone mold and the injection machine used is related to the maximum injection volume, clamping force, the size of the mold part, etc. The overall structure of the curb stone mold is simplified, minimizing the number of parting faces, and using the straight parting surface as far as possible. We should also consider whether the molds are easy to process and facilitate the removal of finished products, and the parting surface should be chosen on the top of the product. Guide part: to ensure accurate alignment of the moving die and the fixed die, guide parts are located on the middle surface. The use of the road along the stone mold has changed. Many customers reflect the die removal of the road along the stone. In fact, the die removal method is very simple. It is to apply the waste oil to the inside of the mold and increase the smooth degree of the inside of the mold. For the whole mold, the cement products need to be completely dried, and it is beneficial to the mold release or the selection. The demoulding machine is produced to reduce the productivity of labor better. At the same time, if the die is chosen, the die can be disassembled to reduce the labor production. With the improvement of our own R & D capacity, the quality competition advantage in the future medium and high quality mould is made, and the price advantage will also reduce the cost with the improvement of technology. The growth of the national economy and the increasing demand for mould will enlarge the rapid development of the mould industry in China.