80 Church Road |
 |
Tel: +44 (0) 1642 671711 |
| Company Info | Contact Details | Mould Flow | Stress Analysis | Design Service | Trouble Shooting | Material Selection |
80 Church Road |
|
Tel: +44 (0) 1642 671711 |
This is the no-frames version of the PDS
Ltd website. |
| Example 1: Mould Flow Simulation of a Jar Lid |
| This is a very simplistic example of how easy it is to cause more problems for yourself during moulding by wrongly choosing one particular gating position over another. A Jar Lid is a very simple component, comprising of a flat uniform top and threaded side region. The mould tool will commonly comprise of many cavities (to produce many lids in one go) and so any problems (and their associated costs) are quite easily multiplied. |
| Centre
Gating - Ideal Injecting the Jar Lid in the centre produces the ideal flow front. The part is filled evenly without any surface blemishes. This filling method is also the most efficient, allowing for short cycle times and therfore reduced production costs. |
|||
10% |
30% |
60% |
100% |
 |
 |
 |
 |
| Side Gating
- Problematic Injecting the Jar Lid on the side could lead to gas entrapments occurring towards the end of flow. This is caused by the thicker 'threaded' region having lower resistance to flow than the relatively thinner lid top. Hence the flow front tends to lead around the sides of the cap and then backfill, causing short-filling, increased cycle time and material burning or surface blemishes on the finished product. |
|||
| 60% | 80% | 90% | 100% |
 |
 |
 |
 |