Shot Weight & Barrel Check — Polycarbonate (PC)
Shot mass and barrel-capacity utilization for Polycarbonate (PC) (density 1.2 g/cm³).
PC's 0.6% shrink is reliable, but molded-in stress is the real dimensional enemy: parts machined or solvent-wiped later reveal stress cracking where packing was greedy.
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.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Shot mass and barrel-capacity utilization for Polycarbonate (PC) (density 1.2 g/cm³). A free injection molding cycle & process tool — no sign-up, no upload, instant results in your browser.
About Shot Weight & Barrel Check — Polycarbonate (PC)
Shot Weight & Barrel Check — Polycarbonate (PC) computes the governing relationship shot = V × ρ_melt; utilization vs PS-adjusted barrel rating (keep 20–80%) live as you type. PC's 0.6% shrink is reliable, but molded-in stress is the real dimensional enemy: parts machined or solvent-wiped later reveal stress cracking where packing was greedy. 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 Shot Weight & Barrel Check — Polycarbonate (PC)
- 1Enter your values — Part volume, Cavities, Runner volume, Melt density and more (sensible defaults are pre-filled).
- 2Read the live results: Shot weight, Barrel utilization.
- 3Check the "with your numbers" line to see shot = V × ρ_melt; utilization vs PS-adjusted barrel rating (keep 20–80%) substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Shot Weight & Barrel Check — Polycarbonate (PC)?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula shot = V × ρ_melt; utilization vs PS-adjusted barrel rating (keep 20–80%) with authoritative sources cited on the page (Rosato, Injection Molding Handbook, 3rd ed.; Resin supplier processing data sheets (per-grade values govern))
- ✓PC's 0.6% shrink is reliable, but molded-in stress is the real dimensional enemy: parts machined or solvent-wiped later reveal stress cracking where packing was greedy.
- ✓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 shot weight & barrel check — polycarbonate (pc) use?+
It evaluates shot = V × ρ_melt; utilization vs PS-adjusted barrel rating (keep 20–80%), exactly as published. Sources: Rosato, Injection Molding Handbook, 3rd ed.; 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?+
PC's 0.6% shrink is reliable, but molded-in stress is the real dimensional enemy: parts machined or solvent-wiped later reveal stress cracking where packing was greedy. 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?+
Shot mass and barrel-capacity utilization for Polycarbonate (PC) (density 1.2 g/cm³). A free injection molding cycle & process tool. PC's 0.6% shrink is reliable, but molded-in stress is the real dimensional enemy: parts machined or solvent-wiped later reveal stress cracking where packing was greedy. 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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