Truck hood

Heavy truck hood, roof and door assemblies... 

A low profile, high heat distortion DCPD resin for applications such as the manufacture of truck hoods, c. 450-500cps e. 30-40/21... 

Tool quality can also affect the surface quality and over time, the tool itself can become porous. Replacing tools generally must be done as the wear will impact part quality to the point of rejection to most OEM standards. Tool hfe varies but 1000 parts is a common figure used to estimate lifetime tool costs. Tool cost is relatively inexpensive, since it is soft tooling. However, multiple tools are generally needed to meet OEM demands. As an example, a truck hood that is from the HSU process may need 6-10 molds to meet a demand of 10,000 units per year. All this can make for an overall expensive program. Figure 1 provides a cost comparison. 

Figure 1 Lifecycle cost analysis for a truck hood utilizing different processes...

Transportation Body panels, under the hood components, truck cabs, tractor components, structural elements... 

Heavy trucks and farm tractors are using RIM parts made with poly-dicyclopentadiene (P-DCPD). This material went from industrial applications to heavy-vehicle exterior components competing with fiber glass reinforced polyester (FRP) (Chapter 15) and aluminum. The big breakthrough in the heavy truck arena came in 1996 with the Kenworth T2000 18-wheeler, which had 14 exterior components of P-DCPD varying in size from an 80 lb roof fairing to smaller parts of 10 to 15 lb each. In the past couple of years P-DCPD RIM has made its mark in the hood of Class 8 heavy trucks. 

Air Point source emission stack, vent (e.g., laboratory hood, distillation unit, reactor, storage tank vent), material loading/unloading operations (including rail cars, tank trucks, and marine vessels). Fugitive emissions pumps, valves, flanges, sample coUection, mechanical seals, relief devices, tanks. Secondary emissions waste and wastewater treatment units, cooling tower, process sewer, sump, spill or leak areas. Equipment wash solvent or water, lab samples. 

Regularly check fume hoods for proper airflow. Ensure that fume hood exhaust is not drawn back into the intake for general building ventilation. Secure compressed gas cylinders at all times and transport them only while secured on a hand truck. 

Such glass fiber-reinforced composites based on the unsaturated polyester thermosets are usually fabricated as sheet molding compounds (SMC) and bulk molding compounds (BMC). These are widely used in various metal replacement applications because of their cost-effectiveness, rigidity, light weight, and corrosion resistance properties particularly useful in transportation (cars and trucks), constmction, pipe, and tank applications. Automotive and tmck body panel and strucmral component applications of SMC include doors, hatchbacks, hoods, front grilles, etc. Some nonautomotive applications of SMC and BMC include sanitaryware (bathtubs, shower stalls, sinks), appliances, business machine, and electrical components. 

Figure 7-86. This 4,000-ton compression press is here fabricating truck and coach hoods, as well as fenders of glass-fiber-TS polyester. This view shows a hood that has been molded, with its separately molded grill attached. 

Weather-Protection Equipment. This equipment (Fig. 4.59) consists of devices to seal or cover the loading-dock area. Truck-dock seals used in conjnnction with flush docks are popular. They have flexible construction and are often inflated. The arriving truck backs into the seal surrounding the door to effect the seal. Also available are hood-type seals which are mechanically activated. Made of flexible material, the hood extends out from the dock and conforms to the shape of the truck or railcar. 

D. aj-C,Hj-0 CH2-COOH. Umiled laboratory tests indicate that dilute aqueous solutions of 2. 4-D caused mild attack of 3003 alloy at ambient temperature. 2, 4-D has been handled in aluminum alloy sprayers and piping. CAUTION. See "Hak>-genated Hydrocarbons. Sec also Ref (3) p. 127. DAIRY PRODUCTS. Aluminum allays have been used for milk pails, milk cans, storage tanks, truck tankers, pasteurizers, coolers, butter chums aud tubs, foil hoods, and powdered milk driers. See also Ref (3) p. 204. (6) p. 11. 

Transportation. Both wrought and cast aluminum have found wide use in automobile construction. Aluminum sand, die, and permanent mold castings are critically important in engine construction. Cast aluminum wheels are growing in importance. Aluminum sheet is used for hoods, tnmk decks, bright finish trim, air intakes, and bumpers. Because of weight hmitations and desire to increase effective payloads, manufacturers have intensively employed aluminum cab, trailer, and truck... 

Operator restraint system The term used for the components on lift trucks that restrain the operator of the lift truck, primarily consisting of the seat belt and hip restraint. It also includes seat mounting, hood, and hood hardware where applicable and instructional material such as warning decals and the operator s manual. 

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