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Injection-Compression Analysis FAQ

Definition

Injection-Compression analysis simulates all major process control schemes for a total evaluation of candidate materials, part design, mold design, and process conditions. Processes can be simulated where polymer injection and mold compression occur simultaneously or sequentially. The compression phase can be programmed to begin before, during, or after polymer injection using timer controls built into the software.

What can an Injection-Compression analysis determine?

• Evaluate the flow front pattern resulting from both material injection and compression due to mold closing
• Evaluate molding feasibility of extremely thin-wall parts
• Determine injection pressure and clamp force requirements for proper molding machine selection
• Place gates to minimize injection pressure and clamp force
• Vary the initial mold open distance prior to the compression stage
• Control the time to begin compression of the mold cavities: before, during, or after the injection of polymer
• Profile mold closing speed and distance settings during the compression stage
• Simulate valve gate shut-off to avoid polymer back filling into the runner during the compression stage

What type of molding problems can an Injection-Compression analysis solve?

• Non-fills in very thin-wall applications
• Excessive clamp force requirements from conventional injection molding
• Reducing molded-in stress
• Controlling differential shrinkage and warpage

What information do you provide with an Injection-Compression analysis?

• All standard filling analysis outputs
• Mold open distance
• Compression (mold closing) profiles and timing