DE329009C - Device for lifting the core box - Google Patents

Description

To remove difficult sand cores flawlessly from the core box, one is already required Series of mechanical core box lifting devices become known; this device ^ - However, they are complicated and unwieldy, so that they do not become naturalized in practice to have.

The device forming the subject of the invention features sieve in particular ίο in that the lifting device when not in use is above the work site is located and is designed like pliers so that it can grasp the core box from the side.

The drawing illustrates the new one Contraption.

α is the base plate, b is the guide column, c is the boom, which is designed as a guide sleeve at g. The round guide f is designed on the inside d as a rack in which the pinion k engages. The handwheel A sits on the gear shaft. At the lower end of the guide rod / is the gripper sleeve> in which the left and right-hand screw spindle k , which carries the handwheel I, is mounted. The grippers i are nut-like and enclose the screw spindle, m is a core box in which the sand core w is located. 0 is the so-called; o core board.

The working process for this device is as follows:

At the start of work is! the gripping device in the highest position. The core box is tamped on in the usual way and then smoothed off at the top. The core board 0 is then swept onto the smooth, leveled core box level, whereupon the core box including the core board is turned over. The gripping device is now lowered downwards with the grippers pulled apart by means of the handwheel h. The grippers i are then screwed together by the handwheel /, which now grasp the core box like tongs. Then, in order to loosen the core η in the core box m, tap the base plate α with a wooden hammer and at the same time move the gripping device upwards using the handwheel h. The gripping device is held in the maximum position by a built-in locking device, which is not shown in the drawing. Due to the completely vertical lifting of the core box, the core remains completely faultless on the core board, so that the so-called patching of the core is no longer necessary.

The device described above offers several advantages:

Since the guide elements are located completely above the work site, they are protected from falling core sand, which means that they have a long service life. The pincer-like gripping device also allows core boxes of different dimensions to be used alternately without having to change the device, ie without losing time; finally, the entire device ^{1 is} simple and clear.

Claims (2)

Patent Claims: Job, d ,. H. above the same be Find. 10 2. Execution of the device i. Device for lifting core | according to claim i, characterized marked box; characterized in that the clamping jaws (i) by a in the right direction necessarily guided screw spindle '^) in wager real direction Clamping jaws that can be moved along with their guidance and the when not in use, move out of the area of the | Grasp the core box from the side. 1 'sheet of drawings.