Neck Finish Specifications The effectiveness of a plastic bottle as a container depends on the creation of a seal between the bottle and its closure to keep the contents from escaping, while permitting easy opening and resealing of the closure.…
Injection molding is a major part of the plastics manufacturing industry and is a big business worldwide, consuming approximately 32 wt% of all plastics. It is in second place to extrusion, which consumes approximately 36 %. the United States alone…
venting for plastic mold making Air in the empty cavities must be displaced by the melt as it flows into the mold during injection. Unless removed quickly, trapped air may actually compress enough to ignite and leave a characteristic burn…
Design of the Molded Part The following factors can significantly influence the design of the molded part: Flow properties of the melt, Solidification behaviour, Pressure transfer in the cooling-down melt, Molecular and fiber orientation, Shrinkage and its dependence on process…
PET preform mould for plastics materials (PET) have been made in some manner for centuries. Some of these PET preform moulds were fine works of art, as, for example, the moulds used by craftsmen in glass. The coming of the modern plastics…
