Rubber Extrusion Die Swell Compensation Factor Model Calculator

Quick Answer

Calculate Rubber Extrusion Die Swell Compensation Factor Model

Result Interpretation

Rubber Extrusion Die Swell Compensation Factor Model Calculator computes Die Swell Compensation Factor in 1 using the defined engineering formula and the input values provided.

Worked Example

Verified calculation

Given:

Rubber-Specific Swell Coefficient = 0.32
Shear-Thinning Exponent for Swell Sensitivity = 0.45
Reference Shear Rate = 50
Measured Die Swell Ratio (D_exit / D_die) = 1.25
Actual Shear Rate at Die Exit = 80

Expected Result:

Die Swell Compensation Factor = 1.0647494367379

Engineering Interpretation:

Under the given input conditions, the calculated result is: Die Swell Compensation Factor = 1.0647494367379.

The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.

Formula / Method

die swell compensation factor = 1.0 + (rubber-specific swell coefficient * pow((reference shear rate / actual shear rate at die exit), shear-thinning exponent for swell sensitivity)) * (D_exit / D_die - 1.0)

Formula family: formula_rubber_extrusion_die_swell_compensation_designer

Variables

Symbol	Label	Role	Description
shear_rate_actual	Actual Shear Rate at Die Exit	INPUT	Actual Shear Rate at Die Exit
shear_rate_ref	Reference Shear Rate	INPUT	Reference Shear Rate
expansion_ratio	Measured Die Swell Ratio (D_exit / D_die)	INPUT	Measured Die Swell Ratio (D_exit / D_die)
k_sw	Rubber-Specific Swell Coefficient	INPUT	Rubber-Specific Swell Coefficient
n_sw	Shear-Thinning Exponent for Swell Sensitivity	INPUT	Shear-Thinning Exponent for Swell Sensitivity
die_swell_compensation_factor	Die Swell Compensation Factor	OUTPUT	Die Swell Compensation Factor

Calculation Steps

Enter the actual shear rate at die exit in s^-1.
Enter the reference shear rate in s^-1.
Enter the measured die swell ratio (d_exit / d_die) in 1.
Enter the rubber-specific swell coefficient in 1.
Enter the shear-thinning exponent for swell sensitivity in 1.
Step 1: Compute die swell compensation factor.
Read the die swell compensation factor (1) from the results.

Engineering Summary

Calculate Rubber Extrusion Die Swell Compensation Factor Model

Frequently Asked Questions

What does this calculator calculate?

The Rubber Extrusion Die Swell Compensation Factor Model Calculator estimates Die Swell Compensation Factor based on the input parameters you provide

Why is actual shear rate at die exit important in this calculation?

actual shear rate at die exit is directly proportional to die swell compensation factor. When you enter actual shear rate at die exit in s^-1, the calculator uses it in the engineering formula to compute the output

How should I interpret the result die swell compensation factor?

The calculator outputs die swell compensation factor. The result is computed directly from the input values using the defined engineering formula

What units should I use for the inputs?

Enter each value in the units shown next to the input field: Actual Shear Rate at Die Exit (s^-1), Reference Shear Rate (s^-1). Make sure all inputs use the specified units for consistent results

What assumptions does this calculator use?

This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment