国产av不卡一区二区_欧美xxxx做受欧美_成年人看的毛片_亚洲第一天堂在线观看_亚洲午夜精品久久久中文影院av_8x8ⅹ国产精品一区二区二区_久久精品国产sm调教网站演员_亚洲av综合色区无码一二三区_成人免费激情视频_国产九九九视频

以色列一位自動生產線設計師設計的純紙板自行車即將在數月內開始大量生產，車身僅重9公斤，售價不超過20美元。據這位設計師介紹，他經過四年的時間研究如何消除紙板材料的結構弱點，同時還花了一年半的時間研究如何折疊紙板才能做出結實的自行車。自行車雛形完成后，還要用有機材料制成的混合材料對紙板進行防水和防火處理。最后進入生產程序的自行車將不使用任何金屬零件，連剎車系統、車輪以及腳踏板都是由可循環材料制成的。除公開銷售以外，紙板自行車還可作為大公司的廣告載體免費發放到消費者手中。據悉，紙板系列的三個自行車款和一個輪椅款將于數月內在以色列開始生產，并在一年內開始銷售。

A bicycle made almost entirely of cardboard has the potential to change transportation habits from the world's most congested cities to the poorest reaches of Africa, its Israeli inventor says.

A bicycle made almost entirely of cardboard has the potential to change transportation habits from the world's most congested cities to the poorest reaches of Africa, its Israeli inventor says.

Izhar Gafni, 50, is an expert in designing automated mass-production lines. He is an amateur cycling enthusiast who for years toyed with an idea of making a bicycle from cardboard.

He said during a recent demonstration that after much trial and error, his latest prototype has now proven itself and mass production will begin in a few months.

"I was always fascinated by applying unconventional technologies to materials and I did this on several occasions. But this was the culmination of a few things that came together. I worked for four years to cancel out the corrugated cardboard's weak structural points," Gafni said.

"Making a cardboard box is easy and it can be very strong and durable, but to make a bicycle was extremely difficult and I had to find the right way to fold the cardboard in several different directions. It took a year and a half, with lots of testing and failure until I got it right," he said.

Once the shape has been formed and cut, the cardboard is treated with a secret concoction made of organic materials to give it its waterproof and fireproof qualities. In the final stage, it is coated with lacquer paint for appearance.

In testing the durability of the treated cardboard, Gafni said he immersed a cross-section in a water tank for several months and it retained all its hardened characteristics.

Once ready for production, the bicycle will include no metal parts, even the brake mechanism and the wheel and pedal bearings will be made of recycled substances, although Gafni said he could not yet reveal those details due to pending patent issues.

"I'm repeatedly surprised at just how strong this material is, it is amazing. Once we are ready to go to production, the bike will have no metal parts at all," Gafni said.

Gafni owns several top-of-the-range bicycles which he said are worth thousands of dollars each, but when his own creation reaches mass production, it should cost no more than about $20 to buy. The cost of materials used are estimated at $9 per unit.

Nimrod Elmish, Gafni's business partner, said cardboard and other recycled materials could bring a major change in current production norms because grants and rebates would only be given for local production and there would be no financial benefits by making bicycles in cheap labor markets.

"This is a real game-changer. It changes ... the way products are manufactured and shipped, it causes factories to be built everywhere instead of moving production to cheaper labor markets, everything that we have known in the production world can change," he said.

Elmish said the cardboard bikes would be made on largely automated production lines and would be supplemented by a workforce comprising pensioners and the disabled.

He said that apart from the social benefits this would provide for all concerned, it would also garner government grants for the manufacturers.

Elmish said the business model they had created meant that rebates for using "green" materials would entirely cancel out production costs and this could allow for bicycles to be given away for free in poor countries.

Producers would reap financial rewards from advertisements such as from multinational companies who would pay for their logo to be part of the frame, he explained.

Elmish said initial production was set to begin in Israel in months on three bicycle models and a wheelchair and they will be available to purchase within a year.

The bicycles are not only very cheap to make, they are very light and do not need to be adjusted or repaired, the solid tires that are made of reconstituted rubber from old car tires will never get a puncture, Elmish said.

A full-size cardboard bicycle will weigh around 9 kg (about 20 lbs) compared to an average metal bicycle, which weight around 14 kg.

相關閱讀

飛機和火車應設兒童隔離區？

自動駕駛汽車在美國上牌

新技術：開燈就有無線寬帶

(Agencies)

（中國日報網英語點津 Helen ）