A low-cost method of conveying castings from the molding shakeout to the cleaning room uses metal container's or tubs transported by forklift trucks or roller conveyors.
Another method of conveyance from the shakeout is by truck alone but is practical only when the casting size is such that other methods are insufficient.
If trolley conveyors, using hanging baskets or buckets, have been used to transport small to medium sized castings from the shakeout, the basket or bucket can be emptied into a tumble blast loader or transferred directly through a cabinet blast with a minimum of manual handling.
In addition to the benefits provided by an efficient shakeout operation (see Part 10 of this series, modern casting, Oct 1989, p 45-47), other benefits are afforded in the finishing room.
Getting castings from shakeout to the cleaning room can be done several ways, the proper method depending on production rate, casting shape and size and the justifiable foundry cost.
Distance from shakeout to cleaning, casting sizes, cooling requirements and cost are the operative selection parameters.
A low-cost method of getting castings from shakeout to the cleaning room uses containers, or tubs, transported by forklift or roller conveyors.
If overhead basket or bucket conveyors are used to deliver castings from shakeout, they can be emptied directly into a tumblast loader.
To accomplish this, most modern foundries use a vibratory or rotary shakeout system.
Ideally, a shakeout operation should accomplish the following:
Again, the ideal shakeout would accomplish each of these.
In addition, the shakeout operation has to meet production requirements without damaging the casting, and generate a minimum amount of dust and noise.