Loading/unloading station

Load/Unload Stations Load/unload stations are employed to clamp/fixture parts on pallets before entering the system, and remove finished parts after their process cycle has been completed. These stations can employ human operators or robots to accomplish the task. 

The clamshell type of rotational molder utilizes an enclosed area that serves as both the oven and the cooling station (Fig. 3). This machine employs only one arm heating, cooling, and loading-unloading stations are all in the same location. 

The most commonplace type of rotomolder is the carousel machine (Fig. 9.4) that has three stations or positions. It has a loading/unloading station, heating station (usually an oven), and cooling station. Cooling usually takes place in an enclosed compartment. The mechanism, as the name indicates, resembles that of a carousel. One or more spindles are connected at one end to a turret or central hub, and to one or more molds at the other end. 

A typical carousel can rotate a full circle freely. The spindles, or arms, are motorized and their motions are controlled independently of the central hub or the oven temperature and dwell time. Individual arms are simultaneously undergoing different phases. One arm is in the loading/unloading station, the second arm is rotating in the oven, and the third arm is in the cooling station. At the end of each cycle, the turret rotates 120° to move each mold to the next cycle. This means that no arm is idle at any time. Some units have more than three arms to increase productivity. More than one arm/ mold can be in the oven with a multiple arm machine. 

The manufacturing cell occupies about 600 sq. ft. area and is comprised of two CNC machining centers (a mill and a lathe), a vision/inspection station and a Load/Unload station(Dock). These four stations and four assembly stations are connected by a conveyor system. The two closed loop conveyors are placed end to end in an L shape configuration. Figure 1 shows a schematic of the entire facility. The main conveyor loop connects the four... 

Truck unloading stations, barge, ship, or railcar loading and unloading stations grain and rack dryers and handling operations. Source Pahl, D., /. Air PoIIut. Control Assoc. 33, 468-482 (1983). 

A commercial rotary, resistance-heated vertical reactor system for semi-continuous operation (Rotox-60) is sold by Unicorp, Inc., CA. It features premixed gas input through four tubes inside the conical deposition chamber for uniform distribution, and has separate stations on a carrier disk for wafer loading/unloading, preheating, deposition, and cool-down. As many as seven 5 cm wafers can be accommodated per station. The maximum oxide deposition rate is 1,700 A/min, with a conservatively estimated overall uniformity of 5% (Kern, 1975). 

Process time from loading station to unloading station 40 minutes ... 

An important reason for preparing study reports is to determine the capital expenditure (investment) of a project [Muthmann, 1984, Prinzing 1985, DAdda 1997]. This is made up of the location-independent ISBL (inside battery limits) process plant costs such as investment in the production plant and the associated control rooms, laboratories, employee facilities, tank farms, and loading and unloading stations, as well as the location-dependent OSBL (outside battery limits) costs of all the service facilities. 

Considering that the belt conveyor is moving at a constant speed Vbc [m/min], the time needed for going from the loading to the unloading station is... 

All piping and valves at the loading or unloading station should be of material that is resistant to MC and should be carefully inspected prior to connection to the transport vehicle and periodically during the operation. 

The system is for semi-automatic arc welding and consists of two stations xi/hich are used alternately by a central welding robot while work is being loaded/unloaded from one station the robot is welding at the other (Figure 1). All control functions (eg sliding door operation, control of the rotating tables etc) are carried out by the robot control system. 

Hardly any batch-type oilseed extractors remain, and modern solvent extractors mainly are of two basic designs. In shallow bed-type extractors, a 0.5- to 1-meter-thick layer of collets or flakes is pulled across a linear screen (Fig. 8.6), or conveyed on a woven belt, and repeatedly percolated with solvent. Deep bed extractors mainly are constructed as carousels with pie-shaped cells (baskets), that are alternately filled (2-3 meters deep), extracted, and unloaded. In some designs, the baskets rotate between the loading, extraction, drainage, and unloading stations (Fig. 8.7) in others, the baskets are stationary with the various stations revolving (Fig. 8.8). Solvent flow always is countercurrent to the direction of... 

Fig. 8.7. Cutaway drawing of Rotocell Solvent Extractor. A carousel with deep-bed baskets rotates by a series of collet/flake loading, solvent extraction, drainage, and unloading stations. (By permission of Davy-Dravo, Inc., Pittsburgh, PA.)...

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