Abstract: An automatically-returning mold ejection device and a casting mold comprising the same. The mold ejection device includes a lower-portion part and an upper-portion part and is wherein the lower-portion part comprises returning rod ejection columns fixed to a mold rack base plate; the upper-portion part comprises returning rods corresponding to the returning rod ejection columns, the top ends of the returning rods are fixed to an ejection rod pushing plate and penetrate through an upper mold connecting plate through returning rod flanges, and a lower mold core of a mold is fixed to the mold rack base plate through a screw. An embodiment of the device has the advantages that the self-returning structure is simple, easy to install and convenient to replace and maintain, and has very good practicability.

Abstract: A low-pressure mold for improving performance of spokes of an aluminum wheel. The mold is characterized in that cooling air holes in a bottom mold are moved for 10 mm outwards; heat-insulation grooves are formed in positions, 5 mm from the cooling air holes, of a back cavity of the bottom mold, and are 8 mm from the surface of a cavity; and the width of each heat-insulation groove is set to 8 mm. A circumference arrangement range of the heat-insulation grooves needs to be larger than the widths of the spokes, and the number of the heat-insulation grooves is defined by the number of the spokes. Heat-preservation asbestos is arranged in each heat-insulation groove, thereby further strengthening heat-insulation and heat preservation functions. One air hole is added based on the prior art, thereby increasing the cooling area and improving the cooling intensity.

Abstract: The present invention provides a device for measuring air tightness of an aluminum alloy hub or a tire and a method for measuring the air tightness of the aluminum alloy hub or the tire by using the device. The device includes a pressure measurement device mounted into a hub or tire to be measured, an inflation device in gas connection with an inside of a tire of a wheel to be measured, and a data acquiring and processing device; wherein the inflation device includes a flow measurement component.

Abstract: The disclosure provides a local extrusion device for high-pressing casting. The local extrusion device for high-pressure casting includes an extrusion core sleeve, an extrusion rod, an extrusion oil cylinder and an extrusion oil cylinder piston. The extrusion oil cylinder includes the extrusion oil cylinder piston, the extrusion oil cylinder piston is connected with the extrusion rod, the extrusion rod is positioned in the extrusion core sleeve, and the extrusion core sleeve and the extrusion oil cylinder are fixed.

Abstract: The present invention relates to a method for drilling in steering knuckles, which comprises locating a casted steering knuckle onto a drilling fixture for a steering knuckle, and aligning the center lines of the maching points of the left and right pieces of the steering knuckle. The method provided by the present invention can meet the requirement for simultaneously drilling the left and right symmetrical pieces of the steering knuckle when in use, and in the meantime, has outstanding advantages of advance technology, high positioning precision, firmness in positioning, high machining efficiency and the like.

Abstract: The invention provides an aluminum alloy hub positioning fixture. The aluminum alloy hub positioning fixture adopts an upper trapezoidal metal taper sleeve and a lower trapezoidal metal taper sleeve, the lower trapezoidal metal taper sleeve is in contact with the central hole of a hub, and the upper trapezoidal metal taper sleeve is in contact with the cap section of the hub; the lower trapezoidal metal taper sleeve is mounted on a hollow shaft, and a metal pipe is arranged in the middle of the hollow shaft. During working, the hub is positioned and mounted on the lower trapezoidal metal taper sleeve via the central hole, the upper trapezoidal metal taper sleeve is in vertical contact with the cap section of the hub under the action of a cylinder.