Abstract:Aiming at solving the expensive cost, low efficiency and poorquality of existing auto filter injection mould, a new type of mould with one die and two cavities layout was developed. The cavity was fixed on the fixed mould plate, and the core along with the added board was fixed on the movableplate. Combinative core, which was combined by core, large side core and small side core, formed the shape of the inner surface of plastic parts. Large side core in its corepulling direction could be separated from the small side core. Under the action of slanted guide pillar, small side core was also used as side slide block, and the small side core would follow the guide chute of added board to realize side corepulling with angled. The small side core was fixed on the added board. The added board, which was an independent structure, was fixed on the movableplate. And there was a guide chute on the added board. The result shows that the layout of the injection mould has overcome the disadvantages of high cost and inconvenience in repairing. It can make the manufacture and repair of largescale mould more convenient, and reduce production cost, ensure precision of plastic parts, enhance productivity, improve the service life of mould.