Lost foam casting and V casting are not a concept
The sand box is evacuated by means of the film covering the sand box surface, and the mould is hardened under the action of atmospheric pressure. Mold release, vacuum suction box, remove the template adsorption on the film, and then the top mold, a mold, pouring off the box, box of sand.
Simply put, that is, the appearance of foam, combustion disappeared, so called lost foam casting, and now generally are using EPS foam as a look.V casting is to open a large number of air holes in aluminum shape on a hollow plate, when the vacuum effect, so that the plastic film to look; stretching rate, the rate of plastic deformation of plastic film with high softening heating, the heating temperature is 80 ~ 200 ~ 120 DEG C; 400mmHg vacuum suction, the film clings to the model surface; spraying paint and drying, the special sand box is covered in thin film model; the filling efficiency is good, the particle size is 100 ~ 200 to dry sand into the sand box, and then the micro vibration, the sand to high density. Open the gate cup, scrape the sand surface and cover with plastic film to close the sand box.
No, it isn't。EPC (also called EPC) is similar to the size and shape of casting wax or bond bubble model combined the cluster model, brush coating and drying, buried in the dry quartz vibration model, pouring under negative pressure, the model of gasification, liquid metal occupy model, a new method of casting casting the formation of solidification after cooling.
