Background technology
At present, in castings production process, because foundry goods local shape, wall thickness, thermal center etc. vary, aluminium alloy pours into after in mold cavity, for prevent due to metal pattern die cavity medium casting each position cooling velocity do not reach require and cause cast-internal to occur the casting defect such as shrinkage cavity and porosity, crackle.Traditional cooling means accurately cannot realize the different cooling required by each position of mold cavity medium casting, very easily causes keypoint part on foundry goods to occur the casting defect such as shrinkage cavity and porosity, crackle because cooling velocity is too fast or it is slow to cross.Need each position of metal pattern in castings production process to design a kind of cold air adjustment device, to adapt to the consistent requirement of foundry goods each position cooling velocity for this reason.
Summary of the invention
The object of the invention is to the some shortcomings that exist for prior art and a kind of on-the-spot highly versatile be provided, the throttle valve gear realizing different cooling for each position of metal pattern in casting process that the cooling of each position of foundry goods in mold cavity requires can be met.
Technical solution of the present invention is: a kind of throttle valve gear for each position of metal pattern in casting process, is characterized in that: comprise valve body and be arranged on inlet channel in valve body and be arranged on the suction nozzle of valve end, the outlet passageway arranged according to each position of metal pattern and the gas regulation mechanism be arranged between this each outlet passageway and inlet channel is also comprised in valve body, described gas regulation mechanism is made up of Compress Spring, valve rod tolerance adjusting head, valve rod fixed block, O RunddichtringO, locking nut, many group adjusting screw(rod)s, described valve rod tolerance adjusting head leading section is provided with an adjusting head circular hole, it is trapezoidal annular groove that back end cylindrical face is provided with cross section, valve design has a valve body circular hole corresponding with adjusting head circular hole, and the two ends of Compress Spring embed adjusting head circular hole and valve body circular hole respectively, valve rod tolerance adjusting head afterbody is designed with one for the O shape seal groove of mounting O-shaped sealing ring, locking nut is designed with internal thread, many groups adjusting screw(rod) is designed with corresponding external screw thread, the form that locking nut and many group adjusting screw(rod)s take internal and external threads to coordinate, reach the object precisely regulated, when screwing many group adjusting screw(rod)s, band ovable valve stem tolerance adjusting head moves forward, thus Compress Spring is compressed, cross section on valve rod tolerance adjusting head back end cylindrical face is that trapezoidal annular groove is connected with venthole place, along with the screw-in amount of many group adjusting screw(rod)s strengthens gradually, the area that annular groove is connected with venthole place also increases gradually, the tolerance of discharging from venthole also increases gradually, otherwise then tolerance reduces gradually.
The present invention is owing to adopting by valve body, Compress Spring, valve rod tolerance adjusting head, valve rod fixed block, O RunddichtringO, the throttle valve gear that locking nut and many group adjusting screw(rod)s are formed, wherein, inlet channel is provided with in valve body, the valve end of inlet channel is provided with suction nozzle, also outlet passageway is provided with according to each position of metal pattern in valve body, be provided with by Compress Spring between this each outlet passageway and inlet channel, valve rod tolerance adjusting head, valve rod fixed block, O RunddichtringO, the gas regulation mechanism of locking nut and many group adjusting screw(rod)s, thus in use, according to casting structure, shape, the difference such as thermal center point determines the different cooling required for each position, by turning clockwise, many group adjusting screw(rod)s realize left and right directions displacement, Compress Spring is made to produce different decrement, thus the gap length changed between valve rod tolerance adjusting head and air admission hole, reach the object of adjusting air inflow quantity size, according to the cooling velocity that each position requires, locking nut after the flow adjustment of output squeezing air is suitable, the refrigerating gas that air pressure is constant can be obtained, thus the stable cooling velocity realized mold cavity medium casting local location.The present invention have making and maintenance cost cheap, on-the-spot highly versatile, can realize arbitrarily the cooling velocity different to same metal pattern plurality of positions in set of device, convenient management, uses feature flexibly.The present invention is mainly used in the cooling of various metal die.
Detailed description of the invention
As shown in Figure 1, Figure 2, Figure 3 shows.The present invention is made up of valve body 1, Compress Spring 2, valve rod tolerance adjusting head 3, valve rod fixed block 4, O RunddichtringO 5, locking nut 6 and many group adjusting screw(rod)s 7.Be provided with inlet channel in valve body 1, this inlet channel is positioned at valve body 1 end and is provided with suction nozzle, is convenient to external cold duct.Also 3 outlet passageways are set according to each position of metal pattern in valve body 1, between this 3 each outlet passageways and inlet channel, are provided with gas regulation mechanism.Gas regulation mechanism is made up of Compress Spring 2, valve rod tolerance adjusting head 3, valve rod fixed block 4, O RunddichtringO 5, locking nut 6 and many group adjusting screw(rod)s 7.Outlet passageway number in valve body 1 can need to arrange according to casting structure, shape, thermal center point, realizes regulating the independence of whole metal pattern plurality of positions cooling velocity, foundry goods each position cooling velocity is consistent.