What are the processing speed requirements for plastic moulds?

The process index of processing speed is very important in the injection moulding process because it is not only related to the processing time of the product, but also determines the processing cost of the product.

EDM machining speed is the mass and volume of the workpiece eroded away within certain pulse parameters and the same unit time, which can be expressed in terms of mass machining speed and volume machining speed respectively.

The maximum machining speed generated relative to the electrical pulse at the time of electrode loss on a mould steel with the same surface finish is an important indicator of the technical performance of the EDM and the machine tool. Generally, the manufacturer will provide the maximum machining current to ensure that the highest machining speed can be achieved at the optimum machining condition of the mould. In practice, however, machining conditions and chip evacuation can vary from the ideal and the size and shape of the workpiece can change so that the machining speed is often below the machine's maximum speed specification.

The size of the crater and the amount of material removed is proportional to the energy of the pulse, i.e. the higher the pulse energy, the more heat is transferred to the workpiece and the more material is removed. In theory, the speed of EDM processing is proportional to the individual pulse energy and discharge frequency, but in practice, the function of the individual pulses is not reflected individually, but is the result of multiple pulses. Since the pulse power supply is continuous and the transfer of energy through the pulse state to the machining gap is very complex, machining speed is a multivariate function related to pulse discharge time, pulse interval, pulse discharge current, pulse waveform, object properties, electrode material and chip removal conditions.