Cast wheel mold cavity exhaust device

Abstract

The invention discloses a cast wheel mold cavity exhaust device, includes a bottom mold, a side mold, a top mold, an upper exhaust pin and a lower exhaust pin. A boss is provided on the bottom mold corresponding to the window molding part of a wheel, a groove cavity is provided on the top mold corresponding to the boss, a step hole is provided on the boss of the bottom mold, and the lower exhaust pin is installed in the step hole.

1 . A cast wheel mold cavity exhaust device, comprising a bottom mold, a side mold, a top mold, an upper exhaust pin and a lower exhaust pin, wherein a boss is provided on the bottom mold corresponding to a window molding part of a wheel, a groove cavity is provided on the top mold corresponding to the boss, and a clearance is provided between fitting surfaces of the boss and the groove cavity;
 a first step hole is provided on the boss of the bottom mold, the lower exhaust pin is installed in the first step hole, the lower exhaust pin is configured as a cylinder and is connected with a mold body, a part, protruding a profile of the mold, of the lower exhaust pin is polished to be smooth, and flaky exhaust lines are arranged axially at a working part of the lower exhaust pin; vent grooves distributed divergently are provided in a profile of the boss by taking the lower exhaust pin as a center, and tail ends of the vent grooves extend to an outer edge of the boss;   a second step hole is provided in the groove cavity of the top mold, the upper exhaust pin is installed in the second step hole, the upper exhaust pin is a cylinder and is connected with the mold body, a part, protruding a profile of the mold, of the upper exhaust pin is polished to be smooth, and flaky exhaust lines are arranged axially at a working part of the upper exhaust pin; vent grooves distributed divergently are formed on a profile of the groove cavity by taking the upper exhaust pin as a center, and tail ends of the vent grooves extend to an outer edge of the groove cavity.   
     
     
         2 . The cast wheel mold cavity exhaust device according to  claim 1 , wherein the clearance provided between the fitting surfaces of the boss and the groove cavity is 0.2-0.5 mm. 
     
     
         3 . The cast wheel mold cavity exhaust device according to  claim 1 , wherein a quantity of the lower exhaust pin is 1-5, and a quantity of the upper exhaust pin is 1-5. 
     
     
         4 . The cast wheel mold cavity exhaust device according to  claim 1 , wherein a quantity of the flaky exhaust lines on the upper exhaust pin is 4-6, and widths of the flaky exhaust lines are 0.2-0.4 mm; a quantity of the flaky exhaust lines on the lower exhaust pin is 4-6, and widths of the flaky exhaust lines are 0.2-0.4 mm. 
     
     
         5 . The cast wheel mold cavity exhaust device according to  claim 1 , wherein depths of the vent grooves distributed divergently in the profile of the boss are 0.5-1.0 mm, and included angles are 60°-90°.