Speaking of which, this was Owen's first time trying glassblowing.

Before the temperature cools down and the glass transforms into a brittle solid, blow the liquid glass into the shape you want.

After that, the formed glass is knocked off the blow tube and put into the annealing kiln for annealing treatment. This is to eliminate the cold explosion phenomenon.

Glass undergoes severe temperature changes and shape changes during the molding process, which will leave thermal stress inside the glass.

This thermal stress can reduce the strength and thermal stability of glass products.

If it is cooled directly at room temperature, it is likely to break on its own during the cooling process or during subsequent storage, transportation and use. This is a cold explosion phenomenon.

Annealing is to maintain or slowly cool down within a certain temperature range for a period of time to eliminate or reduce the thermal stress in the glass to the allowable value.

Only through the above steps can the final glass product be obtained.

Originally thinking that the blowing process would be easy, Owen underestimated this skill.

The glass bubbles he blew were not symmetrical, crooked, and the glass walls were unevenly thin and thick.

No matter how Owen adjusted it, in the end the glass still fixed its shape, and a failed product was obtained, even the next step of annealing was avoided.

This failed work looks like some kind of indescribable filth excreted from the human body.

Looking at the glass products he blew, Owen fell into silence. It seemed that glass blowing still required certain skills.

Maybe you should ask Gita to make a glass mold first, and it would be easier to blow the finished product in the mold.

Don’t be too arrogant and try moldless blowing right away.

Fanny came over to take a look, forced herself to put on a calm face, and said, "Okay, Lord, I believe you, the glass is indeed made of sand."

"Pfft! Hahaha -" she couldn't help laughing after all, "But what kind of look are you bragging about? This is so funny! Hahaha -"

Seeing this, Mapel frowned and retorted displeasedly: "Fanny, what do you know? This is a work of art! Lord Owen made it look like this on purpose!"

The reason why she said this was because she remembered that she had once seen a strange-shaped glass product sold as a work of art at an auction, and was finally bought by a rich man at a very high price.

Okay, Mapel, thank you for defending me like this, Owen felt moved in his heart.

"Ahem!" Owen pretended to cough, "Fanny, please melt it again later. Do you still remember the magic output at that time?"

"Of course I remember." Fanny nodded.

Owen knocked the failed product off the blowpipe, put it back into the crucible in the kiln, and then gave it to Fanny.

Since there is no mold, Owen is not going to continue the challenge of moldless blowing. It is a waste of time. He wants to find someone who is good at glass blowing.

When Irving remelted the glass at home and planned to make it into experimental equipment, he asked someone to help him blow it.

The guy only tried it once and quickly found a way to blow out the desired shape easily and make it into a qualified experimental equipment.

It was also that time that gave Owen the serious misconception that glassblowing seemed to be easy to master.

Taking Mapel with him, Owen hurried to the machine tool room.

When she learned that the lord was coming, Gita hurriedly stopped what she was doing and came over to greet him.

"Lord, what are your orders this time?"

"I want to borrow someone from you."

"I need to borrow someone again."

Hearing this, Gita showed a troubled expression and reached out to grab her messy hair.

"Huh? Don't you have enough manpower here?" Owen said, "Didn't I ask you to recruit a few more apprentices?"

In this regard, Gita explained: "I have recruited several new apprentices, but their skills are not yet skilled enough, and most of the people you want to borrow are apprentices who have been with me for a long time. Once they leave, my work will

It will slow down."

Having said that, it's true. Not long ago, two apprentices were borrowed to operate the machine that makes warheads and cartridge cases, which has already caused a certain impact on Gita.

"Ah, this..."

Owen thought for a while and then said: "Gita, my new task here is quite important. You can give the new apprentices more opportunities to practice. It doesn't matter if they are slower. When they become proficient, their speed will naturally increase."

"Alas -" Gita sighed helplessly, "Okay then, Lord, who do you want to borrow this time?"

"Rob."

"Please wait a moment."

After saying that, Gita turned around and shouted inside: "Rob! Come here quickly!"

"Oh——! I'm coming!"

A young man with freckles on both sides of his cheeks trotted over quickly.

When he saw Owen, he bowed solemnly and said, "Hello, my lord."

"Rob."

Gita patted Rob on the shoulder and warned: "The Lord has an important task for you, you must do it well."

"Yeah, yeah." Rob nodded repeatedly like a chicken pecking at rice, "I will definitely do it."

"Then come with me quickly, Rob." Owen urged.

The three of them hurried back to the glass melting furnace. At this time, Fanny had remelted the failed product made by Owen, and a uniform, bubble-free glass liquid was formed in the crucible.

"Lord, you are finally back. Come and see if you are okay?" Fanny asked anxiously.

Owen went over to take a look, nodded and said, "Okay."

Hearing this, Fanny withdrew her magic with confidence and stepped aside.

Owen picked up the hollow iron pipe, handed it to Rob, and said, "I'll leave it to you, Rob."

After taking the iron pipe, Rob saw the glass liquid in the kiln and suddenly said: "Oh! So you asked me to blow glass. It's that simple."

The same as the previous operation, the iron pipe is inserted into the crucible to pick out the material, and then the ladle is rolled.

Before starting to blow, Rob turned to look at Owen and asked: "Excuse me, Lord, what do you want the glass to look like?"

"Then let's use a flat-bottomed flask," Owen responded.

"OK."

After nodding his head, Rob took a deep breath and began to blow at the other end of the iron pipe, turning it while blowing. The rotation speed was very smooth, and the blown glass bubbles were uniform in thickness and in a perfect spherical shape.

Immediately afterwards, he continued to rotate the iron pipe at a constant speed, and used an iron clamp to quickly squeeze out the shape of a bottleneck at the end. Then he quickly dipped some water into the end of the bottleneck to cool down the glass at the end quickly, and then knocked it off immediately.

, pinch out the shape of a bottle mouth.

Then use iron clamps to clamp the mouth of the bottle, slowly stretch the neck of the bottle, and the shape of the flat-bottomed flask is basically determined.

Finally, knock the flat-bottomed flask off the blow tube, press the bottom of the bottle on the rolling plate to flatten it, and then put it into the annealing kiln for annealing treatment.
Chapter completed!