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The control system of sand-throwing machine PN-40

In a case of batch production, large-scale and mass production of castings to improve the quality and increase the productivity of labor machine methods of making molds are used. At the same time, along with molding machines in cast shops sand-throwing machines are used.

The sand-throwing machine is throwing molding machine, which throws a moldable mixture in the flask at the same time filling it and making compaction of the mixture. Usually, sand-throwing machine are used to stuff medium and large forms, since the size is too small flask obtained significant loss of molding sand, and since the size of the flask is too small there it can result significant loss of molding sand, because of missed sand while stuffing near the edge of the flask. The following types of sand-throwing machines are:

  • stationary two-armed;
  • movable console;
  • bridge;
  • outboard
  • Client JSC "Zaporizhstal"
  • Skills Automation
  • Website https://www.zaporizhstal.com
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The sand-throwing machine PN-40 is a bridge type sand-throwing machine designed for stuffing large forms molds. The sand-throwing machine design is similar to the design of the bridge crane, where instead of lifting mechanism the impeller head is installed, which is a rapidly rotating rotor with several paddles. These blades and throw out of the impeller head «packages» of moldable mixture at high speed straight down into the flask. For feeding the mixture into an impeller head there is a special system of two belt conveyors (one of which is fixed and the other moves). The productivity sand-throwing machine – 40 m3/h, the served area – 3,0h3,0 m, the number of rotation of the rotor impeller heads per minute – 1470.

LLC “Elektrotekhmash” developed control system has the following functions:

  • control of mechanisms of movement of the bridge and the trolley;
  • control of the drive of rotation of the impeller head;
  • control of the reclaimer;
  • padding of shapes of molds and rods in the automatic mode.

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