| Q & A Network - Toolingdocs.com - the process engineer and believe that you can't have too much venting. Our toolroom puts runner vents in all molds right away, but prefers to hold off on parting line vents until...
| |
| ABS TroubleShooting Check residence time of polymer in the barrel Vent cavity at point of air entrapment Vent runner system Increase gate dimensions Increase nozzle diameter Use a lower...
| |
| [pdf] Formolene clogging nozzle/gates * Melt flow variation in resin * Improper venting * Plugged gate, runner or vent * Undersized gates, runners or vents Shrinkage * Volume decreases as...
| |
| [pdf] CONSULTEK CONSULTING FOR PLASTICS INDUSTRY... to recut the runner, add a second gate positioned 180° apart (Illustration 1) and add vents at parting line. 3 Illustration 1 Sprue/Runner/Gate Issues As the material flows...
| |
| [pdf] AutoNoBleed_Letter.qxd to reduce pressure drop and promote shear. 5. Place vents at each 90º intersection and vent to atmosphere. 6. Hot runner molds are acceptable and should be sized by the...
| |
| Mastip - Support Clean all parting line vents. 2. Ensure there is adequate venting on the cavity, core & runners. 3.Resurface the part line to ensure vents have not hobbed into mould plates. 4....
| |
| GAIN TEchnologies - Self Venting Gas Pin with custom lengths (longer or shorter) available. Item Specifications: GGVP0001 Gas Vent Pin Length: 5.38" Standard GAIN the Advantage / GAIN Eliminates Hot Runners / The...
| |
| |
| |
|
|
| |
|
| Subgates & Venting in Nylon 6, Polyethylene... |
| Even without the plastic material type or part prints available, Bob Hatch the Troubleshooter shows how to cure the short shots in Nylon 6, Polyethylene & Polypropylene. |
| Gate Location: IDES - The Plastics Web® |
| I told him the swirls are usually associated with glass-filled nylon 6/6 that is not impact modified. Nylon 6 and 6/66 do not exhibit these surface swirls, and neither do glass-filled nylons with a rubber impact modifier—just straight 33% glass-filled nylon 6/6. I did my usual review of the part, starting with the runners and gates. |
| Injection Molding Q&A With Bob Hatch: IDES... |
| Although times and technology have changed, many of the problems Hatch sees today are the same ones molders and moldmakers struggled with back when he started writing this column. |
|
|