the moulded pallet size is listed below:
- 400 x 300mm
- 600 x 400mm
- 800 x 600mm
- 1200 x 800mm
- 1200 x 900mm
- 1200 x 1000mm
- 1200 x 1200mm
- 1140 x 1140mm
- 1300 x 1100mm
- 1400 x 1400mm
How to Figure Out Plastic Pallet Mould Runner configurations
The runner design layout or configuration chosen by the Plastic Pallet Mould company should exhibit the following attributes:
- encourage equal pressure transmission to each mould impression;
- utilise the shortest possible flow route to each impression;
- be ejected with ease from the pallet mould;
- be of the lowest possible shot weight while functioning adequately
Two basic design groups of runner configuration exist: one of balanced pressure transfer design, the other of unbalanced design .
The choice of configuration to adopt is usually dependent on the required quality of the pallet moulding to be produced. The unbalanced configuration tends to favour the cavities nearest to the sprue entry point during the initial filling of the pallet mould. In such cases overpacking of the pallet mouldings nearest the sprue may occur, whereas underpacking of the mouldings at the extremities of the feed system may also be apparent.
The resultant pallet mouldings would invariably suffer from unequal individual shot weights and a chance of size variation will occur. Long-term control of flash about the component split lines may prove difficult due to the unbalanced filling nature of the tool which becomes more apparent as the tool beds in with age. In the case of a mould which exhibits an unbalanced filling profile, the individual cavity pressure drop can be compensated for by altering the individual gate dimensions, or probe position in the case of runnerless moulds ，until a filling balance is achieved.
With respect to all runner system designs，all runner branch junctions or intersections should be curved and blended with radii where possible in order to minimise the pressure drop induced by the flow of the molten polymer through the system. The addition of cold traps at runner end junctions serve to reduce the clogging effects of chilled slugs of polymer formed at the front of the melt flow as it progresses through the system.