Fundamental Manufacturing Processes, Plastic Injection Molding
Produced By Society of Manufacturing Engineers 
Program Outline
PLASTIC INJECTION MOLDING INTRODUCTION
Injection molded parts, Definition of plastic, Thermoplastics, Thermosets, Injection
molding process variables
THE INJECTION MOLDING MACHINE INTRO
The injection system, The reciprocating screw injection system, The hopper,
The heating bands, Thermocouples, The reciprocating screw, The feed zone, The
melt zone, The metering zone, The non-return valve, Injection of plastic into
the mold, Packing pressure, Material temperature, The two-stage screw injection
system, The clamping system, The hydraulic clamping system, The toggle clamping
system, Clamp tonnage, The injection machine platens, The stationary platen,
The movable platen, The rear stationary platen, Injection molding safety features,
Injection molding cycle modes
THE INJECTION MOLD INTRO
Mold manufacturing, Mounting the mold, The sprue bushing, The runner system,
The gating system, Mold vents, The cooling system, The knockout system, Mold
designs, The cold runner two plate mold, The cold runner three plate mold, The
hot runner mold, The insulated runner mold
INJECTION MACHINE CONTROLS INTRO
Functions of machine controls, Computer use in mold design & construction
REVIEW OF VIDEOTAPE
Study Guide
A PDF version of the video's
study guide.
Abstract
Injection molding is the most common method of producing parts out of plastic
material. It is an extremely versatile process that is capable of producing
parts with a wide range of attributes. Using shop floor footage and animated
sequences this video focuses on the injection molding machine and the injection
mold to illustrate the injection molding process. The injection machine section
covers in detail both the machines' injection system and the clamping system.
In step by step progression, plastic material is followed from it's raw material
state through the melting process and onto it's injection into the mold. Throughout
the sequence, various components of the injection machine are explained. The
mold section continues this examination, allowing clear definition of mold terms
as the molten material is formed, cooled, and ejected as the final part. also
featured in the mold segment are the common mold types, including the two-plate
cold runner mold, three-plate cold runner mold, the hot runner mold, and the
insulated runner mold. this tape concludes with a section on injection machine
controls. Here, the role of computers in daily shop floor activities is augmented
with an examination of computer aided injection mold and part design.
Product Information
1998, 25 Minute Video Tape
Sample Video Clip (size = 3.69 mb)
Note: This avi clip plays best on Microsoft's Windows Media Player
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