Comparative detection of automobile lamps with three-dimensional scanner
one   Industry status
  The customer's product is the car lamp. It is difficult to scan the lamp. Because many places on the lamp are transparent, and the laser of the scanner is transparent, it is difficult to scan.
two    Limitations of customers' current testing methods
  For this car lamp, the customer doesn't have any effective measurement means, and then the customer comes to us. We use hscan handheld 3D laser scanner to help them scan and measure. During the scanning process, we will spray white powder on the transparent part of the object, and through processing, present the data required by the customer completely, and submit the comparison results to the customer.
  Firstly, quickly paste the positioning mark point on the scanned air conditioner, spray the lamp with white powder, and then scan the tested part as a whole through non-contact three-dimensional laser scanning, and carefully scan the details. Finally, compare and adjust the obtained data, and make a test report.
two   Required instrument and model
   Hscan handheld 3D laser scanner Prince series.
three   Scanner working hours
  It takes 2 minutes to paste the marked points;
  Data post-processing and comparison report for ten minutes.
1 scan data
For this kind of car lamp, the hand-held three-dimensional laser scanner has incomparable advantages: first, the point non-contact scanning has no limit on the size of the measured workpiece; Secondly, hand-held scanning, the workpiece does not need to be fixed, and there is no need to specially design the detection fixture, so it can be inspected on arrival. By using our three-dimensional scanner, customers shorten the detection cycle and reduce the detection cost.
Reverse / comparative product display
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By JOHN HOLUSHAAUG. 28, 1991 This is a digitized version of an article from The Times's print archive, before the start of online publication in 1996. To preserve these articles as they originally appeared, The Times does not alter, edit or update them. Occasionally the digitization process introduces transcription errors or other problems. Please send reports of such problems to . As complex plastics increasingly replace metals in cars and appliances, recycling these products becomes a larger problem. Attention is now turning to a high-temperature process called pyrolysis that breaks down plastics into burnable oil and gas.Auto makers and plastic suppliers hope to demonstrate within a few years that this technique has great commercial potential. Environmental advocates question whether pyrolysis is truly recycling, but backers of the technique say it is far better than throwing the plastic away.Pyrolysis breaks materials down by heating them at high temperatures in the absence of air. Because no oxygen is present, plastics and rubber left over from cars do not burn, as they would in an incinerator. Instead, the heat, about 1,300 degrees Fahrenheit, breaks the complex hydrocarbons down into simpler molecules, producing a liquid resembling heating oil and a combustible gas, along with some ash. Potential for PollutionBecause nothing except the fuel for the pyrolysis reactor is burned, the technique may cause less air pollution than incinerators. But if the gas produced by pyrolysis is used to heat the reactor once it reaches operating temperature, as most plans envision, pollution will result from plastic and rubber that contain chlorine or sulfur, said Raymond Machacek, of A. D. Little, a consulting firm.AdvertisementVinyl plastics contain chlorine, and sulfur is used in the vulcanization of rubber. The chlorine and sulfur atoms tend to form hydrochloric and sulfuric acids, which are toxic pollutants, Mr. Machacek said.AdvertisementThe growing amount of plastic in automobiles causes grumbling among metal recyclers, because it results in more worthless material that must be disposed of in landfills, at additional cost. Unlike plastic soda bottles, which can easily be reprocessed, most of the plastics left after cars are shredded and the metals extracted are composites of materials that have been further contaminated by paint and adhesives."Very often you will have incompatible plastics glued together," said Richard L. Klimisch, an environmental specialist at the General Motors Corporation's Technical Center here. In addition, many of the plastics are a type known as thermosets, which cannot be melted down and used again, like the material in soda bottles.A car on exhibit at the technical center, cut away to display new sound-deadening insulation materials, also inadvertently illustrates how difficult these new materials might be to recycle. Several of the insulating materials are simply labeled, "Complex blend of various stuff."Researchers at the G.M. Technical Center are running perhaps the largest pyrolysis trials, but an association that includes several major plastic and rubber makers, including Goodyear Tire and Rubber, Dow Chemical, Eagle-Picher, Allied-Signal and Owens-Corning Fiberglas, is also experimenting with the technique.Industry trends make it clear that metal recyclers are going to have to find ways to cope with more plastic. "Cost is driving the industry to greater use of plastic," said Irvin E. Poston, a plastics specialist at G.M.He notes that plastic body parts are lighter than steel, requiring less costly tooling to shape and improving fuel economy. The entire outer body of G.M.'s new line of mini-vans, like the Chevrolet Lumina APV, is made of composite plastic. Pyrolysis recovers the energy content of plastic after its useful life is finished, he said.Please verify you're not a robot by clicking the box.Invalid email address. Please re-enter.You must select a newsletter to subscribe to.View all New York Times newsletters.Plastics suppliers say they may be able to use the ash produced in pyrolysis as well, particularly if the feedstock is uncontaminated scrap from the production process. Since some of the composites used in auto body panels consist of 50 percent inert filler, clean ash might be substituted for the limestone used now. But it is less likely that ash from shredder residue contaminated with other substances could be used.Industry officials have been quick to label pyrolysis a form of recycling, but some environmentalists say it is similar to incineration, because the material is destroyed and some energy is used. "We do not consider incineration as recycling on this side of the environmental fence, and a lot of people put pyrolysis in the same category," said Lisa Collaton, a solid-waste specialist at the Environmental Action Foundation in Washington.AdvertisementAdded John Ruston of the Environmental Defense Fund in New York, "Pyrolysis is not recycling; it is pyrolysis."Mr. Poston said G.M. and some plastic suppliers had run pyrolysis tests on shredder residue at two operations for processing old tires. He said that once the material reached operating temperature, it gave off enough gas to be self-sustaining without external fuel. The recovered oil is available for sale.He said the company and its suppliers planned larger-scale tests to see if the approach was technically and economically feasible in commercial quantities. "We have done 5,000 pounds; now we are going to do a run of 50,000 pounds so we can see the true economics," Mr. Poston said. More Plastic in CarsA group of plastic parts suppliers predicts that the amount of thermoset materials going into cars will almost double by 1995, to 423 million pounds, from 242 million pounds in 1990. That is in addition to thermoplastic materials, which can be melted and used again.Officials involved in recycling say pyrolysis may have a place in materials disposal, after more valuable plastic parts of old cars and appliances have been pulled out for recycling. "Pyrolysis can be part of the waste-management approach, but we should not give up on recovering various plastic streams for re-use," said Michael Fisher, a technical director at the Council for Solid Waste Solutions, a plastics industry group.Noting that it took metal recyclers several decades to refine techniques for separating different metals and alloys, he said that the plastics industry was just beginning the process. "There are 20 different types of plastic on an automobile," he said. "Some will be recycled, and some will go for pyrolysis."Herschel Cutler, executive director of the Institute for Scrap Recycling Industries, said the institute was interested in pyrolysis, despite economic, technical and pollution problems with some other experiments. "There have been some plants in the past that were dismal failures," he said.Nevertheless, he said, with the amount of plastic in cars rising, "we are still looking at it." He added, "We may see a new generation of pyrolytic activity that really can convert materials to oil, gas and carbon black."A version of this article appears in print on August 28, 1991, on Page D00009 of the National edition with the headline: . Order Reprints| Today's Paper|Subscribe

Choosing the wrong combination from the vast collection of glues and plastics can result in a weak bond or even sometimes damage the object you ought to repair. You need to have an insight about glues and plastics in order to select the best glue for the plastic at hand. In this article, I have shared some of the best glue for plastic that exist in the market near you. Top 5 Glues for PlasticsLet's discuss them step by step in detail.This package of glue for the plastic comes with everything you need for your repairs. It comes with thick and thin adhesives, a booster with a spray and two structural composites. The booster is there to facilitate fast curing and micro application to allow for precise application. The bottle has a long nozzle for precise application. It comes with a single, four or twelve-pack package. The glue is made with an extra strong formula which makes it suitable for strong and tough repairs. The glue can be able to bind several types of plastics, glass, ceramic, metal, wood and PVCs. It also has a low viscosity which makes it the best for bonding of close-fitting. Most of the people who have used this glue give comments that it is the strongest one that exists for small plastic parts. It can also be used for several other purposes such as bonding wood, glass, PVCs, ceramic, Metal, and acrylic. The package comes with everything that you may need for the application. It has a preparation pad that you are supposed to use for prior cleaning of the surface of application. This cement has been rated as the best in the market for bonding ABS plastics and Polystyrene. You can use it to repair kitchen items and for model kits. The package comes with 4 precise glue tips to make the task easier. Another thing to note is that this product is not a glue but it is plastic cement serving the same purpose as the glues. This package comes in two parts. The mixing ratio of the two parts is 1:1. It can be used to bond stainless metals, concrete, thermal set and thermoplastics among many more. The glue dries ton and therefore you should use it on places you are planning to paint.

A common problem on bumper covers is that the tabs that attach the bumper to the car get broken. This is critical, as this is what secures and aligns the bumper cover. Many times, a broken tab is all that is wrong with the bumper cover. With the cost of these plastic parts $200 to $700, the replacement cost can break the bank.In this tutorial you are going to learn a few simple steps to repair a broken tab to as good as new at a fraction of the cost.Depending on location of the tab, the bumper may need to be removed. However, many times this repair can be made with the bumper cover still attached to the car.Step 1: Wash with Soap and WaterStart the repairs with a good wash to remove contaminates on the bumper cover. This will assure all silicones are removed which will provide a quality repair.Step 2: Grind TabWhere the tab broke, use a 50 grit roloc disc to grind the repair area to a point. This will provide the correct shape to maximize adhesion. When grinding plastic, use a slow RPM.Step 3: Sand TabUsing 80 grit by hand or 80 grit on a dual action sander, sand the repair area to assure all areas the adhesive will come in contact with is sanded. Do not apply adhesive on an un-sanded surface.Step 4: Drill HolesDrill holes on repair location using a 1/8 inch drill bit. This will allow the adhesive to flow from one side of the repair to the other side providing a rivet like effect.Step 5: Clean Repair AreaUsing compressed air, blow the repair area clean. Do not use any type of solvent cleaner, as this can absorb into the plastic, which will cause problems.Step 6: Adhesion PromoterSpray a light coat of adhesion promoter to the repair area. This is important so the adhesive adheres to the repair. Allow the adhesion promoter to dry for 5 to 10 minutes.Step 7: Cut Plastic and Apply AdhesiveCut a piece of plastic from the package the tab repair adhesive came in to shape the adhesive. Support the bottom of the plastic using a spreader. Apply adhesive to the plastic, then lightly press the adhesive to the backside of the repair. Next, wrap the plastic around the tab location. Make sure the plastic extends past the original length of the plastic tab. Lastly, lightly apply pressure using a spreader on the top of the adhesive to shape the tab. Do not apply too much pressure, as this will build a tab that is too thin. Allow to set-up 30 seconds to one minute. The release pressure on spreaders and allow to finish drying.Step 8: Precut TabAfter a minute or two, before completely drying, precut the tab a little larger than the tab size. Then allow to finish drying about 5 minutes.Step 9: Sand TabOnce the tab is fully hardened (about 5 minutes) remove plastic from around the tab and shape the tab using the 50 grit roloc disc, followed by 80 grit by hand or on a dual action sander.Step 10: Drill HoleThe last step is to drill the hole for the clip or bolt to go through to attach it to the vehicle.That's It!You normally will not see the tabs once secured to the vehicle. However, you may choose to repaint the tab before attaching to the vehicle..Warning!You only have about 30 seconds work time with this tab repair adhesive. So be sure you have everything you need before applying the adhesive to tab location. Be sure to watch the video for additional information and how to purge the adhesive cartridge before usingProducts Used in This Tutorial50 Grit Roloc Grinder Disc80 Grit Sandpaper3M 04747 Super Fast Repair Adhesive3M 05907 Adhesion Promoter