3 results about "Vacuum assisted" patented technology

The invention refers to a venting device (20) for vacuum die casting. The device comprises: an input port (15) meant to be fluidly connected to a die casting mould cavity, an output port (10) meant to be fluidly connected to a vacuum source, a gas evacuation channel (19) fluidly communicating the input port (15) with the output port (10), a cooling channel (18) fluidly communicating the input port (15) with the output port (10), a valve member (17) arranged to open and close the passage between the input port (15) and the gas evacuation channel (19). Preferably, at least a section of the cooling channel (18) has a wavy configuration. The venting device (1) optimizes the efficiency of the mould venting by means of the two channels (18, 19) to discharge the gases from the mould cavity (2).

The present application relates to the ground treatment technology, especially to the weak ground treatment technology with high water content, in particular to a vacuum-assisted composite rigid drainage device and a drainage method, which solves the problem of poor bearing capacity improvement effect of the weak ground with high water content after dehydration in the prior art, and the need for secondary reinforcement treatment, and realizes rapid dehydration through the rigid vertical drainage assembly, the rigid horizontal drainage assembly and the vacuum-assisted device. After dehydration, the vertical drainage unit is left in the soil to directly improve the bearing capacity of the soil body for the large machinery to enter. The rigid vertical drainage assembly comprises a plurality of vertical drainage units inserted into the weak ground, the vertical drainage unit comprises a rigid plate-shaped part, the plate surface of the rigid plate-shaped part is provided with vertically distributed drainage ropes, and the outside is wrapped with a water-permeable geotextile; the rigid horizontal drainage assembly comprises a rigid drainage support layer covering the surface of the weak ground, the upper surface of the rigid drainage support layer is provided with a flexible sealing layer, and the flexible sealing layer is provided with a drainage port.