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This three
day, total 24 hours, seminar is an advanced course, designed as a follow up to Seminar II "Injection Mold
Design". This seminar is recommended for mold design engineers, mold procurement
personnel, mold designers, moldmakers, mold maintenance personnel, technical
management and attendants who previously participated in Seminar II. This is an advanced
course. A knowledge of basic mold design and an understanding of the injection molding
process are a prerequisite.
At this seminar you
will.... Participate in an unique learning
experience, lectured by an instructor who has over four decades of injection molding,
mold making and mold design experience.
Enhance technical skills and
experience on mold filling and material flow analysis.
Expand awareness of alternatives
available when selecting mold components, programmed core pull or opening actions,
and learn to evaluate which design allows greater flexibility.
Gain an understanding of the
methods of construction.
Receive a comprehensive
custom-developed instruction manual, provided only to participants of this seminar, which
will serve as a valuable source in the future.
Seminar
Outline
I Mold
Engineering Principles Selecting the suitable molding
press.
Type of automation required.
Polymer flow into the mold.
Hagen-Poiseuille formula.
Computer aided mold filling
analysis.
Pressure monitoring.
Runner lay-out and gate
position(s).
II
Mold base; alignment and thermal expansion considerations Leader pin and leader pin bushings.
Parting line interlocks (lock plug,
taper bar, flat taper, straight side, etc.).
Guided ejector mechanism
Cavity and core alignments.
III
Mold Design Concepts Cam action activated by: angle pin,
angle block, finger cam, puller pin, etc.
Cam action activated by ejector
mechanism, internal cam, cam latch, lifters, jigglers.
Spring loaded cams, flexi cores.
Hydraulic activated cams, core pull
cylinders and self locking cylinders.
Heel block, slide and gib design.
Slide retainers and slide locking
devices.
Mechanical and helical spindles,
sliding devices. Post mold designs with hydraulic activated stripper plates.
Programmed ejection, latching techniques, accelerated knockouts, and other programmed actions.
Programmed guide rail ejections.
Interchangeable inserts.
Air-eject and vacuum breaks.
IV
Unscrewing, collapsible core and stack molds Unscrewing mold with: helical
spindle, rack and pinion, hydraulic motor and other unscrewing devices.
Collapsible core and collapsible
cavity mold: installation and mold base machining.
Stack mold: runnerless melt
conveying, opening and ejection sequence.
V Special
purpose molds Multi-shot molding and multi-shot
molds: (retracting core, over-molding transfer technology, non-rotating and rotating
molds, multi-shot hot manifold and coaxial needle valve).
Shuttle mold techniques (shuttle
and rotary)
Outsert or substrate molds, reel to
reel molding.
VI
Machining methods EDM, wire EDM, mold texturing, ARC spray, electro-forming
and nickel vapor deposition.
VII Hot
Runner MoldsHeating plastic channel to melt
temperature and controlling temperature of plastic channel.
Types of
heating elements and isothermal conditions. Seebeck effect and Thermocouple installation.
Annular and cylindrical flow channels.
Internal heating tube and
external heating manifold. Gate balance. Design concerns and gating
options.
Sequential valve gating.
VIII Mold Design
Checklist A systematic approach to check major categories such as:
Production requirements; Part requirements; Shrinkage and tolerances; Molding machine;
Mold base or frame; Cavity; Runners; Gates; Special actions; Venting; Ejector systems;
Guided ejector systems; Temperature regulation; Cylinders; Electrical; Lubrication;
Maintenance; Drafting, and Documentation.
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