"Chief, the gas station said it can deliver gas..."

"Okay. You can have someone bring it to you." Xiao Bailang put on his sunglasses and walked to the gas nozzles that had just been installed. There was a row of yellow copper nozzles. He waved his hand: "Let's get started."

Several workers unscrewed the valve, and red flames immediately spurted out from the combustion head. Xiao Bailang put on his thick labor protection gloves and carefully adjusted the flames until blue flames spurted out.

"Prepare the interface!"

Huang Zhongshan hurriedly brought over the two glass bottle preforms, one large and one small, that had just been blown from the annealing kiln with pliers. Xiao Bailang first burned the bottom of the large bottle and the neck of the small bottle with gas, and then used a blade to clean them.

Then he put the small bottle into the large bottle and filled three small pieces of cork between the large and small bottles.

Formally speaking, asbestos particles should be used, and the Works and Energy Commission can only temporarily use substitutes. Its function is to maintain an equal gap between the inner and outer bottles so that they will not shake. Another function is to strengthen the bottles.

Structural strength of the bladder. After the bladder is made, the only connection between the inner and outer bottles is the bottle mouth. After filling with water, the bottle mouth is easy to break. After inlaying asbestos, it is equivalent to adding three additional support points.

Then he heated the large bottle into the small bottle over the gas fire until it was in a semi-melted state. This critical step was about to arrive. With a serious look, Xiao Bailang pulled up the pliers to grab the semi-molten glass liquid, and carefully closed the gap at the bottom.

. This process seems simple, but it requires certain technical requirements for manual operation. It not only requires that the bottom of the bottle be sealed smoothly and tightly, but also a thin glass tube must be left. Modern thermos bottle companies use automatic bottom pulling machines.

Finish.

Xiao Bailang tried several times, but failed. His face was red from the gas fire. He put down the pliers and took a few breaths, and asked others to try. After struggling a few times, he finally sealed the bottom as required.

.

Next comes the silver plating process. The thermos bottle bile is plated with silver nitrate. The silver plating agent is injected into the bile wall through the small glass tube reserved at the bottom of the bottle. With the basic supply of three acids and two alkali, this is basically

It didn't matter. After pouring out the residual liquid, a layer of bright silver was left on the entire wall of the glass bottle, which was as shiny as a mirror.

The workers let out a surprised sigh. In fact, they had already seen the "secret skills" of the time travelers when making mirrors. There were some greedy eyes in the crowd looking at the residual liquid poured out of the bottle.

After silver plating, the workers poured distilled water into it, washed it and dried it. Xiao Bailang used a gas fire to burn the glass tube at the bottom of the bottle and then inserted it into the air extraction pipe - this simple air extraction machine.

The machine is designed and manufactured by Zhong Lishi. It is a very simple pumping type and can barely reach the level of rough vacuum.

While pumping the gas, use a gas fire to heat the outer bottle to promote the expansion of the gas so that the gas can be quickly pumped out. Of course, the home-made air pump cannot determine the status of the air pumping. Xiao Bailang had to use the most primitive method and try again and again.
Chapter completed!