According to the statistics of China mould industry association, in 2016, the scale of China's mould market reached 223 billion yuan, supporting the related product manufacturing industry of about 25 trillion yuan. As the "mother of industry" and "benefit amplifier", mould has played a great role in the transformation from "made in China" to "made in China". Mold manufacturers also have many factors about mold design that may affect shrinkage. Cooling channel design, gate type and gate size may have a variety of effects. For example, a small gate such as a tubular gate cools much faster than a conical gate. Premature cooling at the gate will reduce the filling time in the cavity and increase the probability of shrinkage marks.