Spindle
The spindle a should be large enough not to spring when being used, and long enough to conveniently clear the highest mold. A piece of 2-inch shafting is a handy size, for with it the sweeps may be made uniformly 1 inch less than the required diameter and placed snug to the spindle when set up, and the correct size of mold is ensured. This spindle should revolve smoothly in a step b. The step shown may be set at any convenient place on the floor. It has a long taper bearing, as shown in section A, capable of holding a 5-foot spindle without need of any top bearing. The three arms serve to make the step set firmly, and upon them any plate may be readily leveled up. Where a tall spindle is used, the spindle socket is more shallow; the step may be cast without arms and be bedded in the floor. The top of the spindle is steadied by the bracket c. This must carry a bearing box so designed that the spindle may be readily set in position or removed. And the bracket must swing back out of the way when any parts of the mold are to be handled by the crane. Sweeps. The sweeps are attached by means of the sweep arm d. The detail B shows one method of clamping the sweep arm to the spindle by using a key. The arm is offset so that one face hangs in line with the center of the spindle. Bolting the face side of the sweep to this brings the working edge in a true radial plane. Sweeps are usually made from pine about 1 1/8 inches thick. The working edge is cut to the exact contour of the form to be swept, and then is beveled so that the edge actually sweeping the surface is only about 1 inch. For very accurate work or when sweeps are to be much used, the edge is faced with thin strap iron to prevent wear
แกนหมุนThe spindle a should be large enough not to spring when being used, and long enough to conveniently clear the highest mold. A piece of 2-inch shafting is a handy size, for with it the sweeps may be made uniformly 1 inch less than the required diameter and placed snug to the spindle when set up, and the correct size of mold is ensured. This spindle should revolve smoothly in a step b. The step shown may be set at any convenient place on the floor. It has a long taper bearing, as shown in section A, capable of holding a 5-foot spindle without need of any top bearing. The three arms serve to make the step set firmly, and upon them any plate may be readily leveled up. Where a tall spindle is used, the spindle socket is more shallow; the step may be cast without arms and be bedded in the floor. The top of the spindle is steadied by the bracket c. This must carry a bearing box so designed that the spindle may be readily set in position or removed. And the bracket must swing back out of the way when any parts of the mold are to be handled by the crane. Sweeps. The sweeps are attached by means of the sweep arm d. The detail B shows one method of clamping the sweep arm to the spindle by using a key. The arm is offset so that one face hangs in line with the center of the spindle. Bolting the face side of the sweep to this brings the working edge in a true radial plane. Sweeps are usually made from pine about 1 1/8 inches thick. The working edge is cut to the exact contour of the form to be swept, and then is beveled so that the edge actually sweeping the surface is only about 1 inch. For very accurate work or when sweeps are to be much used, the edge is faced with thin strap iron to prevent wear
การแปล กรุณารอสักครู่..