Suction valve unit for evacuating gas from the mold
A technology of suction valve and valve device, applied in the field of suction valve device, can solve the problems of reducing machine reliability, influence of downtime manufacturing cost, increasing operating cost, etc., to reduce downtime, easy and economical maintenance and replacement, The effect of increasing reliability
Inactive Publication Date: 2016-06-29
V D S VACUUM DIECASTING SERVICE
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Problems solved by technology
This results in removal being performed through the control cavity
Disassembly at the level of the control chamber with joints and tolerances makes the repair process lengthy and complicated, drastically increasing the operating costs, taking into account the fact that the machine is idle during valve repair and repair
Machine downtime has a large impact on the cost of manufacturing castings
[0004] In traditional solutions, as described in patents US4691755 and US4997026, the axis of the piston of the valve is oriented parallel to the parting plane of the two parts of the mould, also with the need for a jack for the poppet valve device during the opening of the mould. The disadvantage of this jack is that the maintenance cost of this jack is high and reduces the reliability of the machine
Method used
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[0064] First refer to figure 1 , the die casting or injection molding system 1 includes a die casting or injection molding machine 2, a vacuum generating system 6 and an air suction valve device 4 installed on the machine 2 and communicating with the vacuum generating system 6 through an exhaust connection 24. The vacuum generating system 6 comprises a tank 14 forming a chamber with a larger volume than the gas in the mold to be sucked, which chamber is connected to a vacuum pump (not shown) which creates a partial vacuum inside the tank. The vacuum generation system may also include a main valve 16 which may be controlled to open and close the conduit connecting the valve arrangement to the tank 14 . The vacuum generation system evacuates the air from the mold very quickly before and during injection of the liquid material into the mold.
[0065] The die casting or injection molding machine 2 comprises a tank 8 having a chamber 5 for containing a liquid material 3 to be cast...
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Abstract
The invention relates to a valve device for a pressure injection or die-casting machine, said device comprising a body (18) having a valve chamber (21) containing a suction chamber and a control chamber, and a slide mounted in said valve chamber valve (20), said spool valve comprising a first portion (34) having a valve head (44) cooperating with a valve seat (22) on said body to open and close said valve, and comprising a (21a) inside the second part (35) of the piston (38). The control chamber is connected to a fluid control connection (26a, 26b) for applying pressure on said piston (38) for opening and closing of the control valve. The second valve part and the first valve part are coaxially aligned in the displacement direction of the spool valve, the first part and the second part of the spool valve being separable from each other and using detachable fasteners (36, 36') from each other connect.
Description
technical field [0001] The invention relates to a suction valve arrangement for evacuating gas from a mold, in particular from an injection mold for liquid metals or an injection mold for plastic materials. Background technique [0002] In European patent EP936009 a differential valve for venting gas from a liquid metal die casting mold is described. Liquidmetal die casting produces complex shaped molded parts in metal alloys such as aluminum, magnesium, zinc, zinc alloys or other injected materials. It is important to inject the still liquid metal into the mold very quickly to ensure complete filling of the mold with minimal metal solidification caused by contact with the mold wall and to ensure uniform properties of the injected material after it has solidified. The suction valve exhausts the gas contained in the mold before and during the injection of liquid metal into the mold, the valve is connected to the vacuum tank to create a partial vacuum in the mold cavity by su...
Claims
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IPC IPC(8): B22D17/14
CPCB22D17/145B22D17/14
Inventor 雷内·比格克里斯多夫·巴尼奥
Owner V D S VACUUM DIECASTING SERVICE