Which steps can be used to determine the number of mold cavities in an injection blow mold?
The first step is to find the clamping force for each module.
Clamping force = the projected area of the blank X 3kN/cm2
The projected area in the formula is cm2.3kN/cm2 is a rough estimation parameter obtained from a large number of trials.The accurate data can only be obtained by analyzing the factors such as the thickness, length and pressure of different molding materials.For long and thin - walled billets, the estimated parameters with or equal to 3kN/cm2 should be strictly selected.For short blank with thick wall, the estimated parameter can be reduced to 2kN/cm2.Secondly, the locking force of each mold divided by the blow molding machine head set blank total lock
The number of cavities is given by the force of the mould.
In the second step, the total width of the entire cavity of each die must be compared with the length of the gate of the rotating head of the machine to determine whether this arrangement is in line with the actual situation.In order to make the mold different layout, most machine manufacturers are marked with the maximum cavity width.
The third step is to calibrate the final product shape to determine if the product is suitable for the first or second step of the design.If the designed die cannot accommodate the product width properly, the number of die cavities should be reduced appropriately.