怎么做一支倒着用的圆珠笔

when you think of the ballpoint pen spare thought for its ingenious design how does it manage to write clean sharp lines without leaking ink all over the page inside a strong aluminum casing fifteen tiny， but tough parts work together a super hard one twenty fifth of an inch diameter tungsten carbide ball sits perfectly inside a precision engineered socket so the ink runs freely， but doesn't leak a hermetically sealed cartridge holds one tenth of an ounce of ink enough to write 300 thousand words while a spring loaded cam retracts the pen's nib in a split second these features make a pen so good it's hardly changed for over 75 years the tungsten carbide ball must roll over the page without leaking ink the pen smudge free lines depend on the way that workers in this nivata factory put its nib together i've been here i think 34 years right in there danny operates the machines that create the nibs what danny doesn't know about ballpoint pen nibs isn't worth knowing we take a coil of stainless steel wire and then it gets fed into a rotating head with two carbide cutting tools on it it comes out a solid blank that's what we start to process danny carves them out of these short lengths of steel using this ingenious machine it has 18 stations that transform the steel blank into a nib and position depends 25th of an inch ball inside it there's just enough flarence between the ball and the socket for it to rotate if you're not perfect then they can't go out the door the pen can draw clean continuous line of ink， but how does the nib pop in and out with just a click of the thumb when the pen clicks down it pushes on two interlocking mechanical parts as they slide down and push sideways the bottom piece locks into a slot on the side casing and holds the nib in place with the sentence complete another click unlocks the cam and releases a tightly coiled spring which pushes the nib safely back inside the pen's ink must flow freely to write smoothly on the page， but dry quickly so it doesn't smudge the runningness of the ink hinges on the way that workers put the ink cartridges together i've pretty much worked in every department other than actually making me caesar runs as factories day to day operations his number one priority is to keep the ink flowing through this machine and into the pen's cartridges we can make like 15 to 20 thousand refills a day the cartridges move on a conveyor between the machines eight stations the first station squirts ink in the most important thing about this machine is to have consistent pressure that way all the ink gets pushed out and used up the machine slides home the ballpoint nib squeezes in a dollop of glue and seals the cartridge shut with a brass plug when the ink is cold it's almost like a tar it's very gooey and gummy as a ballpoint turns it turns it into a more liquidy substance the pen's ink becomes running under pressure so when the ballpoint nib presses down on it the ink flows freely onto the paper caesar tests one nib in 25 these doodling machines check that the pen nibs roll smoothly and that the ink flows freely to pass the test the nibs must write non stop for more than two miles only when they make the grade can they leave the factory floor。

哈喽，小朋友们大家好，我是你最喜欢的爱玩斯坦，今天爱玩斯坦要做的实验呢，是用两支圆珠笔在不用胶带的情况下联合在一起，快来看看爱玩斯坦是怎么做的吧。 我们先撕一张长十厘米宽三厘米长的长方形纸条出来，然后将它包裹住两支圆珠笔，并把它卷紧。 我们在选两支圆珠笔的时候，一定要把两支圆珠笔卷的紧紧的，这样的话才能达成最终的实验效果。 当两只圆珠笔卷好之后，我们选任意一端用力的向下一搓， 爱瓦斯坦这次不够用力，所以实验失败了，我们再来一次吧， 我们重新把两只圆珠笔卷在纸卷内，注意我们还是要把它卷的紧紧的， 我真的很不错，我真的很不错，我真的 这次爱玩斯坦用力的快速的往下搓，神奇的事情发生了， 两支圆珠笔在不用胶带的情况下竟然粘合在一起了，并且还能挑起一个小小的电公交。这个实验是因为两 只圆珠笔在直卷的包裹下变得亲密无间，然后在快速剧烈的外力摩擦之下产生了大量的热量，使塑料做的圆珠笔接触面马上就融化了，并联合在一起。 仔细看，两根圆珠笔的接触面上居然还连着一根小塑料丝，这个塑料丝就是融化的时候塑料拉扯出来的丝，这根塑料丝还连在圆珠笔的两端呢。