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 [...]
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 [...]
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 [...]
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 [...]
Parison Molds Individual parison mold blocks are normally fabricated from 1017 HRS or P-20 pre-hard steel for use with polyolefin molding resins. Molds for rigid resins, such as styrenics, nitriles, carbonates, etc.” are usually made [...]
Injection Molding In contrast with compression molding, this method is the most widely used for the forming of thermoplastic materials. With some modifications for a quicker adjustment of the temperature, some thermosetting materials, especially formulated [...]
The selection of the coloring technique is dependent on two factors and each must be considered before a decision is made. These factors are: Quality of color distribution Quantity of color required Quality Approximately 75 [...]
Alignment of Components Examination of Fig. 1 suggests some of the alignment problems encountered in assuring that the core rods are concentric to their respective cavities. It is usual practice to utilize individual cavity blocks [...]
BLOW MOLDED PRODUCT DESIGN Numerous standard rules apply to the blow-molded parts making and are valuable in preventing serious problems and complaints in the manufacture or use of the item. The unique features of the [...]
injection blow molding design and construction The design of tooling for injection blow molding as discussed herein is intended for equipment utilizing the horizontal rotary index method of core rod transfer. This principle has been [...]