Pneumatic valve double pneumatic butterfly valve plate casting process design

our company is domestic production of industrial automatic control of pneumatic valve enterprise. One of the important parts - — Pneumatic valve plate ( Figure, because of its overall size and minimum wall thickness only ~ mm, parting difficulties, My company USES Japan imported VRH - CO vacuum hardening process modelling) , thus, the positioning pin can't install pneumatic valve plate defects such as deformation, dislocation, casting the shape, size accuracy cannot be guaranteed. To this end, we groped after repeated, finally USES the leakage process, successfully produced out of the pneumatic valve butterfly double pneumatic valve plate castings.

figure double pneumatic valve plate structure diagram

leak molding design drip molding process, as shown in the figure parting surface in the center of the pneumatic valve plate. Due to leakage model is adopted, model the actual thickness of the greatly improved, and practice, on the basis of good quality plywood 20, its crisscrossed the bonding of wood, make a model of entity, and install the appropriate positioning pin; Fake rice also USES plywood, 20 at the bottom of the fixed installation on double gate, with a few pins. This method got more reasonable model thickness, to avoid the model selects the advanced materials and complex process.

figure draw process diagram

use effect according to the above process to make model, because the actual thickness increasing, the deformation ability to strengthen, the service life of the model greatly improved. Modelling, puts false box bottom plate. Using positioning cone and fixed pin to fake box fixed plate, and then the model with the positioning pin is fixed on the plate, the parting surface of the ground after modelling, cavity shape, size and accurate. A few batch of casting test results show that the process of casting the pneumatic valve plate, the shape, dimensional accuracy and surface quality are meet the requirements of parts design, avoid the happening of the defects such as deformation, dislocation.

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