The Blow Up Ratio (BUR) Calculator is a specialized tool used in the plastic film manufacturing industry. It helps determine the relationship between the diameter of the blown film and the diameter of the die used during the extrusion process. This ratio is crucial for understanding and controlling the film's mechanical properties, such as thickness, strength, and flexibility. The Blow Up Ratio is essential for manufacturers to optimize the production process and ensure consistent quality in the final product.
Formula of Blow Up Ratio Calculator
The formula to calculate the Blow Up Ratio is straightforward:
Detailed Calculation Steps:
- Measure the Diameter of the Blown Film (D_bf): This is the diameter of the film after it has been expand by air during the manufacturing process.
- Measure the Diameter of the Die (D_d): This is the diameter of the die from which the molten plastic is extruded.
- Divide D_bf by D_d: The Blow Up Ratio is calculated by dividing the diameter of the blown film by the diameter of the die.
By following these steps, manufacturers can accurately determine the Blow Up Ratio, which is vital for controlling film properties during production.
Conversion Table
To assist with quick calculations, here is a table showing common die diameters and their corresponding blown film diameters, along with the calculated Blow Up Ratio:
| Diameter of Die (D_d) | Diameter of Blown Film (D_bf) | Blow Up Ratio (BUR) |
|---|---|---|
| 100 mm | 200 mm | 2.0 |
| 100 mm | 250 mm | 2.5 |
| 150 mm | 300 mm | 2.0 |
| 150 mm | 375 mm | 2.5 |
| 200 mm | 400 mm | 2.0 |
| 200 mm | 500 mm | 2.5 |
This table is a quick reference for common blow-up ratios use in the industry, allowing professionals to verify or adjust their process parameters efficiently.
Example of Blow Up Ratio Calculator
Let’s go through an example to illustrate how the Blow Up Ratio Calculator works.
Suppose a manufacturer is working with a die that has a diameter of 120 mm and produces a blown film with a diameter of 300 mm:
- Diameter of the Die (D_d): 120 mm
- Diameter of the Blown Film (D_bf): 300 mm
- Blow Up Ratio (BUR): 300 mm / 120 mm = 2.5
In this example, the Blow Up Ratio is 2.5. Indicating that the blown film is 2.5 times the diameter of the die used during production. This ratio helps in controlling the film's thickness and other properties.
Most Common FAQs
The Blow Up Ratio is crucial in determining the final properties of the plastic film. Such as thickness uniformity, strength, and flexibility. It also affects the film's suitability for various applications.
A typical Blow Up Ratio ranges from 1.5 to 4.0. Depending on the desired film properties and the specific requirements of the production process.
Yes, a high Blow Up Ratio can lead to thinner films, which may affect the film's strength and durability. It is important to balance the ratio to achieve the desired film characteristics.