| 1 |
narrow slot leading from the cavity |
| 2 | venting channel |
| 3 | ejector pin with ground venting grooves that also lead directly out of the plate |
Function:
When filling a mold with a plastic melt, the entrapped air in the runners and cavities must get a chance to get out.
In order to do this you have to build in air vents at the spots where the air otherwise would have been trapped.
Risk:
- If the venting is inadequate there is a risk of filling problems of the cavities.
- Surface burns may also occur on the parts where the compressed air is trapped.
- reduce physical properties at weld lines
Design:
