Pre blow in extrusion blow molding

Pre Blow - The injection of a medium into a closed parison before the molds close.

Injection machine platen speed

Platen Speed - The closing/opening speed of a platen movement in inches per second (or cm/sec).

Injection molding machine platen daylight

Platen Daylight - Open - Maximum and Minimum open distance; closed - Maximum and Minimum shut distance.

Injection molding machine platen

Injection molding machine platen - The plates on which the mold assembly is mounted. Large metal blocks on clamping ends of a molding machine used to support the mold.

Plastic Shut Off Valve

Plastic Shut Off Valve - A valve used to shut off plastic flow, usually mounted in a manifold.

Screw pitch

Screw pitch - Distance in an axial direction from the center of a flight at its periphery to the center of the next flight. In a single flighted screw “pitch” and “lead” will be the same, but they will be different in a multiple flighted screw.

Pinch off

Pinch off - Those sections of a parison which are not taken within the cavity of a mold, and which are removed after blowing.

Pin (Mandrel) and Bushing (Die) Banks

Pin (Mandrel) and Bushing (Die) Banks - The maximum pin (mandrel) size and minimum bushing (die) size supplied unfinished.

Plastic parting line

Parting line - Line, visible on the molded part, where the mold separates to release the molded part from the cavity.

Multi-cavity plastic mold

Multi-cavity mold - A mold with two or more cavities.

Moving Mandrel Die Head

Moving Mandrel Die Head - A die head whose mandrel of die pin can be moved vertically so as to vary the orifice opening.

Plastic mold frame

Plastic mold frame - Series of metal plates which support mold components.

Plastic mold components

Plastic mold components - Parts that make up a mold and determine how a mold will be operated.

Metering section of screw

Metering section of screw - A relatively shallow portion of the screw at the discharge end with a constant depth and lead, usually three to four turns of the flight in length, at which the melt is advanced at a uniform rate to the screw tip.

Mold matte finish

Matte finish - A surface which displays no gloss when observed at any angle.

Guide pins & rods

Guide Pins - Devices to maintain proper alignment for molds.
Guide Rods - Rods which guide the platens but take no clamp force.

Draft plastic molding

Draft - The degree of taper of a side wall or the angle of clearance designed to facilitate ejection of parts from the mold.

Die adjustment extrusion blow molding

Die Adjustment - Means for moving the die relative to the die pin ( lower mandrel).

Die head extrusion blow molding

Die head - The structure which holds the die.

Die body extrusion blow modling

Die body - The main structure of the die head excluding the ring and pin.