the material additive processes lead fastest to moldings
the material additive processes lead fastest to moldings and are therefore the most promising. These also include new and further in RP. Examples of such techniques are laser sintering, […]
introduction to mold lifting
Safety must be a primary consideration of the mold designer. How can a mold, or any heavy mold part, handled safely? No person should repeatedly lift parts heavier than 20KG or any part which is awkward to handle, regardless of weight, without some mechanical assistance, such as a hoist. […]
Introduction to rapid tooling
Time and cost are becoming more and more important factors in the development of new products. It is therefore extremely important for the injection molding industry to produce prototypes that can go into production as quickly as possible. […]
introduction to polishing
Polishing is essentially the removal of metal by the action of free abrasive grains carried to the work piece by a tool. The difference between these methods is only the degree of removal. […]
Polishing may achieve special optical properties in a product
Polishing may achieve special optical properties in a product. When enlight beams pass through the product wall( compact discs, mirrors, etc.), any major unevenness or waviness will distort the light and result in poor performance of the product.
Polishing may enhance the appearance of the product
Polishing may enhance the appearance of the product. This is the most common requirement in plastic molding. It should be noted, however, […]
Polishing may facilitate ejection
Polishing may facilitate ejection. This applies generally to the finish of the core, including side cores, in cases where the product has projections produced by deep recesses in the cavity or where there is little draft angle specified, the cavity must also be free of any roughness that prevent easy ejection.
Polishing may prevent stress risers in a product
Polishing may prevent stress risers in a product. Any sharp indent or corner in hardened mold steel, usually created during grinding, will increase the risk of breakage caused by stress concentration. Such corners must be polished to remove the shape “ gouges”.
cutting by spark erosion with traveling-wire electrodes
This is a very economical process for cutting through-hole of arbitrary geometry in workpiece. The wall of the openings may be inclined to the plate surface. Thanks to the considerable efficiency of this process, some cavities are increasingly being cut directly into mold plates. […]
the introduction of planetary electric discharge machining
In plain vertical eroding, the eroded configuration is already dimensionally determined by the shape and dimensions of the electrode. Machining of undercuts is not feasible. […]