Injection Molding worked example
Cushion Percentage with cushion amount of 1.75 g: a worked example
This worked example runs the cushion percentage numbers for a tougher week than the baseline: cushion amount of 1.75 g instead of the typical 3.5 g. Calculate the screw cushion as a percentage of total shot size to verify consistent pack pressure transfer.
The inputs for this scenario
- Cushion amount: 1.75 g (the input this scenario stresses; the baseline uses 3.5)
- Total shot size: 52 g (held at the documented default)
Working through the calculation
- The calculation starts from the formula this tool documents: Cushion percentage = (Cushion amount / Total shot size) x 100.
- Rate works out to 3.37 % at these inputs, and this is the headline figure for the scenario.
- Gap to target works out to -3.37 points at these inputs.
- Affected count works out to 1.75 count at these inputs.
- Total count works out to 52 count at these inputs.
How this compares with the baseline
- Against the tool's baseline example, where cushion amount sits at 3.5 g and the headline result is 6.73 %, this scenario comes in 50% below the baseline at 3.37 %.
- Use it when validating a new process or monitoring a running job to confirm the cushion stays inside the 5%-10% target band. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.
Results at a glance
- Rate: 3.37 % (headline result)
- Gap to target: -3.37 points
- Affected count: 1.75 count
- Total count: 52 count
Run it with your numbers
- To rerun this with your own numbers, open the live Cushion Percentage calculator, set cushion amount to your actual value, and adjust the remaining inputs to match your operation.
Last reviewed 2026-05-12.