Song Jin did not bring out her big guns in this competition. She had already had the idea in her mind when she was in class some time ago.
She prepared the design drawings of the expansion screws.
When everyone discussed it before, almost everyone mentioned a problem, that is, some nails and screws cannot be driven into the wall. Even if they are driven in with force, they will quickly loosen and even damage the wall, causing a big hole in the wall.
But there is no better way at the moment.
When Song Jin heard this, he thought of expansion screws.
Expansion screws achieve fixation by generating friction through the inclination. When the nut is tightened, the screw will move outward through the thread, and the expansion tube and the composite cable on the periphery will generate positive pressure, and the wall, expansion tube and cone will achieve a fixing effect.
Since the content and requirements of the competition were announced in advance, everyone was only given three days this time.
On the morning of the third day, everyone sat in the auditorium. After numerous rounds of screening and elimination, only the top thirty contestants remained.
Others were either eliminated early or gave up on their own. More gave up in this round because they thought they could not design anything.
In order to avoid the appearance of identical drawings and designs, the format of this competition was announced first.
After the host calls out his name, he goes on stage and shows his drawings to everyone, and then all the factory leaders pass the drawings around to look at them together.
During the viewing process, the contestants told everyone the source of their creative inspiration, their creative ideas, why they wanted to do this, what the function of this thing is, etc.
Finally, all factory leaders will comment and score together.
Song Jin's number was drawn very late, so it was indeed afternoon.
But she has also been looking at other people's works. Some of them are very creative, such as modifying steam engines, trying to build windmills, and modifying car engines. Song Jin has to admit that there are always people better than you.
When asked how to make and use some parts, most people still said that there is currently nothing suitable in the country.
It was finally Song Jin's turn in the afternoon. When she said her work was an expansion screw, no one reacted because they didn't know what it was.
Then Song Jin handed over the drawings and began to explain.
Hearing that the source of the creation came from the problems raised during the discussion, she silently took notes and then worked hard to solve the problems. The leaders of each factory looked at Director Lin with a bit of envy.
Everyone was obviously very interested in this, and then asked how it would be used once it was built, including where it could be applied.
Song Jin spoke eloquently: "First, choose a drill bit suitable for the expansion screw, drill a hole in the wall, and insert the entire expansion screw kit into the hole. Don't rush to unscrew the nut at this time, otherwise it will be difficult to remove it later; tighten the nut, and when it feels tight, unscrew it; then align the fixing of the object with the screw and install it, and finally tighten the nut."
After a pause, he continued:
"The screw has a threaded end and a taper at the other. It's wrapped in a sheet metal (or sometimes a steel pipe), with several cutouts on one half of the sheet metal cylinder (steel pipe). They're inserted together into a hole drilled in the wall, and then a nut is tightened. The nut pulls the screw outward, pulling the taper into the sheet metal cylinder, which expands and secures it tightly to the wall. It's commonly used to fasten guardrails, awnings, air conditioners, and other items to cement, brick, and other materials. However, its fixing isn't very reliable. If there's a large vibration under load, it can come loose, so it's not recommended for installing ceiling fans, etc."
Everyone present was amazed. This girl was amazing. Not only was she not at all stage-frightened, but she also spoke very clearly.
In the end, there was no suspense and Song Jin won the first place in the competition.
A commendation meeting will be held in the auditorium tomorrow morning.
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