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Definitions (52)
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family mold
A multiple cavity mold which produces non-identical parts simultaneously.
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feed section
The section of the screw just under and slightly forward of the feed hopper. Fill Pattern The contour the melt takes sequentially as it fills the cavity. The mold should fill with a straight flow fron [..]
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finish
The surface texture of a finished article.
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fisheyes
Describes a very small void which has not blended completely with the surrounding material. Usually caused by a minute quantity of silicone, oil or other surface contaminate on the surface of the subs [..]
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flash
Resin that is forced out of the mold cavity area and onto the parting line or into the vents of the mold. A very thin film of cured resin attached to the molded part. Flash Pockets Flash pockets provi [..]
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flow
The ability of the molten resin to move or travel during injection. Flow can be influenced by temperature, part design, process conditions and tool design. Flow Balancing Modifying flow paths, particu [..]
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flow leader
A small area in the mold (usually no more than 0.200" to 0.300" wide) which locally thickens the wall to allow material to flow into outer areas more smoothly. A molders "tr [..]
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injection or fill time
Time required to fill the cavity or mold. Injection Compression Molding A method of molding where the plastic is injected into a partially open cavity with injection pressure typically 50-75% lower th [..]
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knockout pin
A pin that ejects a molded article from the mold. Land Area The area of surfaces of a mold which contact each other when the mold is closed.
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land
Gate dimension parallel to the direction of melt flow. L/D Ratio Extrusion Barrel length divided by the diameter of the barrel
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