Thermal Expansion of Molds
Even the state of thermal expansion is extremely complex and it is very difficult to predict it by theory.
The method of supplying oil is modified, the contact surface area is reduced, and the amount of deformation is absorbed by providing an escape.
In addition, a technique is used of balancing the thermal bias by using additionally the temperature controlling function.
A cooling water flow path is provided near the heater or the manifold, or an air thermal insulation layer is provided, or a thermal insulation plate is provided.