Clamp Force — ABS
Required clamp tonnage for a ABS part from projected area and cavity pressure.
ABS is the molder's all-rounder: amorphous (low, uniform shrink), tolerant melt window, paints and plates well. Splay from skipped drying is its signature defect. Under-clamping flashes the parting line; chronic 20% over-clamping crushes vents and wears the platens — size the machine to ~80% of its rating.
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.
Required clamp tonnage for a ABS part from projected area and cavity pressure. A free injection molding cycle & process tool — no sign-up, no upload, instant results in your browser.
About Clamp Force — ABS
Clamp Force — ABS computes the governing relationship F = A_projected × p_cavity × (1+margin) live as you type. ABS is the molder's all-rounder: amorphous (low, uniform shrink), tolerant melt window, paints and plates well. Splay from skipped drying is its signature defect. Under-clamping flashes the parting line; chronic 20% over-clamping crushes vents and wears the platens — size the machine to ~80% of its rating. 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 Clamp Force — ABS
- 1Enter your values — Projected area (part), Cavities, Runner projected area, Cavity pressure and more (sensible defaults are pre-filled).
- 2Read the live results: Required clamp, Per cm² (sanity).
- 3Check the "with your numbers" line to see F = A_projected × p_cavity × (1+margin) substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Clamp Force — ABS?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula F = A_projected × p_cavity × (1+margin) with authoritative sources cited on the page (Rosato, Injection Molding Handbook, 3rd ed.; Resin supplier processing data sheets (per-grade values govern))
- ✓ABS is the molder's all-rounder: amorphous (low, uniform shrink), tolerant melt window, paints and plates well.
- ✓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 clamp force — abs use?+
It evaluates F = A_projected × p_cavity × (1+margin), 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?+
ABS is the molder's all-rounder: amorphous (low, uniform shrink), tolerant melt window, paints and plates well. 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?+
Required clamp tonnage for a ABS part from projected area and cavity pressure. A free injection molding cycle & process tool. Splay from skipped drying is its signature defect. 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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