Cooling Time — Polystyrene (GPPS)
Theoretical cooling time for a Polystyrene (GPPS) part from wall thickness and temperatures (Wübken plate model).
GPPS is the easiest material on this list — low pressure, fast cycle, water-clear. Its brittleness is the design constraint, not the process. Cooling scales with thickness SQUARED — the 0.5 mm a designer adds 'for strength' costs every cycle forever.
Formula
Note: Starting-point process values — the resin grade's datasheet and an in-mold study govern. Verify with a gate-seal study and a cooling-time ladder on the actual tool.
Theoretical cooling time for a Polystyrene (GPPS) part from wall thickness and temperatures (Wübken plate model). A free injection molding cycle & process tool — no sign-up, no upload, instant results in your browser.
About Cooling Time — Polystyrene (GPPS)
Cooling Time — Polystyrene (GPPS) computes the governing relationship t = h²/(π²α) · ln[(4/π)·(T_melt−T_mold)/(T_eject−T_mold)] live as you type. GPPS is the easiest material on this list — low pressure, fast cycle, water-clear. Its brittleness is the design constraint, not the process. Cooling scales with thickness SQUARED — the 0.5 mm a designer adds 'for strength' costs every cycle forever. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use Cooling Time — Polystyrene (GPPS)
- 1Enter your values — Max wall thickness, Melt temperature, Mold (coolant) temperature, Ejection temperature and more (sensible defaults are pre-filled).
- 2Read the live results: Cooling time, Share of a typical cycle.
- 3Check the "with your numbers" line to see t = h²/(π²α) · ln[(4/π)·(T_melt−T_mold)/(T_eject−T_mold)] substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Cooling Time — Polystyrene (GPPS)?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula t = h²/(π²α) · ln[(4/π)·(T_melt−T_mold)/(T_eject−T_mold)] with authoritative sources cited on the page (Osswald & Hernández-Ortiz, Polymer Processing — Modeling and Simulation; Resin supplier processing data sheets (per-grade values govern))
- ✓GPPS is the easiest material on this list — low pressure, fast cycle, water-clear.
- ✓SI ⇄ Imperial toggle converts your inputs in place, so you can work in the units your drawings use
Frequently asked questions
What formula does the cooling time — polystyrene (gpps) use?+
It evaluates t = h²/(π²α) · ln[(4/π)·(T_melt−T_mold)/(T_eject−T_mold)], exactly as published. Sources: Osswald & Hernández-Ortiz, Polymer Processing — Modeling and Simulation; Resin supplier processing data sheets (per-grade values govern). The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
GPPS is the easiest material on this list — low pressure, fast cycle, water-clear. Starting-point process values — the resin grade's datasheet and an in-mold study govern. Verify with a gate-seal study and a cooling-time ladder on the actual tool.
When is this calculator the right tool for the job?+
Theoretical cooling time for a Polystyrene (GPPS) part from wall thickness and temperatures (Wübken plate model). A free injection molding cycle & process tool. Its brittleness is the design constraint, not the process. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Does it support both metric and imperial units?+
Yes — the SI ⇄ Imperial toggle converts the values already in the fields, preserving the physical quantity, so you can flip mid-calculation without re-entering anything.
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