The task is to develop a formula for the clamping force needed to hold the two halves of a mold together. To aid in this effort the cross sections of two different molds are shown in the sketch. In case 1 a circular cross section disk is being produced, e.g., a checker. In case 2 a spherical part is being produced, e.g., a plastic marble or ball. In each case the melt in the mold cavity is under a pressure of p = 30 MPa and the clamping force is represented by F.
An explanation of the action of the melt in the mold cavity and the calculation of the resulting clamping force is provided
HERE - Explanation