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 of an oil-hardening steel (A-2…
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 alkyds, may also be injection…
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 per cent of color distribution…
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 and locate these via key…
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 blow-molding process eliminate the need…
