poor flow
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8/18/2019 Poor flow
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Rotational Molding Troubleshooting
Problem : Poor flow - into mold
recesses
Poor mold design.
- Increase radii at the corners or recesses
- Use a width to depth ratio at least 4 to 1 for all ribbed or closelyspaced areas
- Increase heat transfer around narrow features or other complexareas using air flow amplifier, heat deflectors or thermal pins
Improper mold rotation - Adjust the ratio and/or speed of rotation
Probable Cause Possible Solutions
Too low melt index - Use a resin with a higher melt index (e.g. MFI 7).