Plastics bumpers

It is briefly reported that, with its factories running at full capacity in the production of expandable PP beads used in core material of automobile bumpers, JSP International recently started building a new plant in Tullahoma, Tennessee. The new plant, with an annual production capacity of 2,800 tons, is scheduled to start operations next July. With a 75% share of the US plastic bumper market, the company is currently capable of producing 14,000 t/y of expandable PP beads. 

The antenna window for the millimeter-waves is a lens of plastic material, which can be heated by wires in order to increase the availability in the winter season. The whole sensor is mounted in air cooling slots of the vehicle front end or behind plastic bumper material by means of a model-specific bracket. 

Fixture weight is limited by conveyor and drive capabilities. The transfer conveyor must be able to carry the fixtures. And because fixture bases get rough treatment, include replaceable wear strips where they contact the conveyor. Replacing wear strips is cheaper than replacing bases. In addition, plastic bumpers cut wear, noise, and shock. 

Ford Sierra featured the first all-plastic bumper in Europe, and the Ford Taurus and Sable featured the first of these bumpers in the United States. The bumper is molded from GE s Xenoy polycarbonate (PC)/polybutylene terephthalate (PBT) blend. The high impact strength of PC, combined with the resistance to gasoline and oil and the processing ease of PBT, has boosted the use of PC/PBT blends in car bumpers. Bayer s PC/PBT blends are called Makrolon PR. They are used for several automobile impact-resistant parts. 

Engineers and designers should select equipment for installation which has low vibration and noise characteristics. They can require permissible maximum noise levels in specifications for new equipment. They can determine whether an operation, process, or piece of equipment that is noisy can be avoided or eliminated by use of a quieter one. Equipment that might vibrate should be mounted on firm, solid foundations. If equipment vibrates, they can determine whether or not its characteristics can be changed by use of devices such as dynamic dampers, rubber or plastic bumpers, flexible mountings and couplings, or resilient flooring. Where vibrations of fixed equipment cannot be eliminated, mount the equipment on vibration isolators to prevent transmission of motion. 

Wheel house liner- recycled from TPO plastic bumpers... 

Eollowing the success story of the plastic bumpers, for automobiles, which commercially replaced the heavy metallic bumpers, the plastic fuel tanks are making inroads to replace metallic fuel tanks. The plastic tanks offer weight reduction, freedom from corrosion, and ease of fabrication. 

The watershed , when for the first time there were more models being manufactured with partly or wholly plastic bumpers than with wholly steel ones probably occurred in 1979, which was also the year when the 4km/hr legislation was introduced. From this point on, the ultimate ambitions for bumpers began to take shape the idea of a completely integrated front and rear end, suitably colour matched, and totally damage resistant at 4km/hr. 

Waste automotive plastic bumpers - plastic can be recycled but the paint has to be removed first. 

Figure 9.12 Structural bonding application for a reinforced plastic bumper assembly for a truck. The equipment dispenses a two-component structural adhesive onto the bumper assembly before it is integrated into the truck. In production, this is typically done robotically with a manual backup system (shown). The system being used is a See-Ro 488 meter/mix system the dispense gun in the picture is model 2200-250-000 dual-spool Snuf-Bak dispense valve that utilizes a No-Rush disposable static mixer nozzle. (Photo provided by Sealant Equipment and Engineering, Inc.)...

The ability of a painted plastic part to withstand the impact of foreign objects such as small stones and gravel has been extensively reviewed by Ryntz et al. (11,12). Test methods range from the simple projectile of small stones at cold substrate (e.g., SAE J400) to the more precise impact tests described by Ryntz and others. In a fully painted plastic bumper, chip damage can occur ... 

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