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Blow Molding Parison Blow-Up Ratio (BUR) & Wall Thickness Calculator

Easily calculate and compute blow molding parison blow-up ratio (bur) & wall thickness calculator with accurate equations, live formulas, and expert guidance.

Maximum external diameter of blown hollow container.

Pre-pinch hollow extruded tube outside diameter.

Extruded tube initial scissored wall thickness.

Axial elongation ratio in stretch blow molding.

Calculated Result
3

Blow-Up Ratio (BUR)

Blow-Up Ratio (BUR)

3

Blow Up Ratio Bur

3

Final Average Wall Thickness Mm

0.853

Circumferential Hoop Strain Percent

200

Total Area Expansion Ratio

3.75

3

Calculation Breakdown

  1. Applied FormulaDetermines the blow-up ratio (BUR), circumferential hoop stretching, and resulting final wall thickness distribution in extrusion blow molding and stretch blow molding.\text{BUR} = \frac{D_m}{D_p}, \quad t_b \approx \frac{t_p}{\text{BUR} \cdot \lambda_z}

Parison Blow-Up Ratio Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.00.81.52.33.0Blow-Up Ratio (BUR)

What Is the Blow Molding Parison Blow-Up Ratio (BUR) & Wall Thickness Calculator?

This tool computes blow molding parison blow-up ratio (bur) & wall thickness calculator with high precision arithmetic.

How Does the Blow Molding Parison Blow-Up Ratio (BUR) & Wall Thickness Calculator Work?

Determines the blow-up ratio (BUR), circumferential hoop stretching, and resulting final wall thickness distribution in extrusion blow molding and stretch blow molding.

Blow Molding Parison Blow-Up Ratio (BUR) & Wall Thickness Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

BUR=DmDp,tb≈tpBUR⋅λz\text{BUR} = \frac{D_m}{D_p}, \quad t_b \approx \frac{t_p}{\text{BUR} \cdot \lambda_z}

Determines the blow-up ratio (BUR), circumferential hoop stretching, and resulting final wall thickness distribution in extrusion blow molding and stretch blow molding.

How to Use the Blow Molding Parison Blow-Up Ratio (BUR) & Wall Thickness Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Blow Molding Parison Blow-Up Ratio (BUR) & Wall Thickness Calculator Example

Input Values:

moldedBottleDiameterDm:90.0
extrudedParisonDiameterDp:30.0
parisonWallThicknessTp:3.2
axialStretchRatioSl:1.25
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required Blow-Up Ratio (BUR).

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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