Canopy machines

Canopy machines are difficult to set up. Typically, only a single row of products is cut at a time. As a result, the trim press cycles are far shorter than those of the thermoformer, meaning that frequent maintenance and punch and die interference alignment are often required. 

Fixed systems are those where movement of the hood or other changes to the system, except perhaps opening and closing of lids and doors, is not possible. One example is the hood with a sliding door surrounding a drilling or a milling machine another is the laboratory fume hood and another is the canopy hood above or the enclosure around a paper machine. 

Industrial-type Hazards—-with the objective of identifying hazard sources in electrical, mechanical, illumination, and non-emergency communication fields. Developments have included (a) advanced remote surveillance and communication systems, (hi portable-area illumination systems. Ic) trolley-phone wireless systems, and (d) protective canopies for use on underground low-coal machines. 

Figure 5 illustrates a vertical laminar flow canopy such as might be used for localized protection of a filling machine or the off-loading station from a sterilizer. Fixed ot portable versions of this type of unit are available and have a wide application in aseptic manufacture. 

The problem is where to measure the velocity The options are close to the filter face, in the working area, or at the extremities of the protected area (air exiting from, say, the curtains of a vertical laminar flow canopy). The resolution of where to measure may not be easy. For instance the filter face of a large vertical flow canopy shrouding a filling machine may be more than 1 m above the filling zone. By and large the pharmaceutical industry has chosen to measure air velocity close to the filter face. 

Under the tradename Copel LR Resin, silicone polycarbonates found applications ranging from oxygen enrichment membranes (including heart-lung machines), aerospace canopies and interlayers for bullet-proof glazing. They are prepared by the phosgenation of bisphenol A and chlorine terminated polydimethylsiloxane oligomer in methylene chloride with pyridine as a base acceptor (Eq. 7). 

Indoor ranges typically have specially constracted back walls or birllet traps, roofs, and side walls. Outdoor ranges may have concrete tubes to prevent stray shots (such as 10-m machine gun ranges), may lack a backstop to allow roimds to travel to their maximum range, or may be designed as fully or partially contained ranges (combination of side walls, bullet trap, canopy baffle, and... 

A cycle or cycle time is the elapsed time required for the injection-molding machine to complete the process of forming a part. It can be timed starting at any point of the cycle to the same point on the next cycle. Cycle times range from below 4 s for compact discs to hours for jet canopies, both made from polycarbonate. Machines have been made that can cycle in less than one second. 

For protection from the sun machine shouid be fitted with a canopy or cab. 

Figure 16.14 Sequence for off-machine but in-line thin-gauge canopy trimming machine often called punch-and-die trimmer.

The roof bolt machine, with its ATRS and canopy, is the critical piece of safety equipment. It should always be in proper operating condition before it is used. The proper bolting sequence, as defined in the roof control plan, must always be followed. Several fatalities have resulted when operators of singleboom machines installed bolts out of sequence and placed themselves under unsupported roof. 

Paper machine Canopy type 200-300 over face... 

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