The production of bicycles is not very difficult, so Chen Chen quickly drew the drawings, and now Dongshui also produces steel, so the production of bicycles is not a problem. (8) (1) 中┡文网*.ん81.

It's just that there doesn't seem to be any rubber to make tires, and it seems that rubber needs to be produced, otherwise tires are difficult to make and wheels are difficult to run.

"Come on, bring the leader of Wei to this king." Chen Chen made the drawings, because there was no rubber, so he had to ask Commander Wei to send someone to collect it.

After a while, Commander Wei came to Chen Chen: "See Your Majesty!" ”

Chen Chen smiled slightly: "It's not a big deal to come to you today, you have been training in the forest recently, so have you ever seen a rubber tree?" ”

"Rubber trees?" Commander Wei couldn't help but be stunned when he heard Chen Chen's question.

Looking at Commander Wei's blank eyes, Chen Chen knew that it seemed that he didn't know the situation, and he was the only one who went out in person.

"It seems that you don't know about rubber trees, so well, let's go in person, and you can find me a few men in the army." Chen Chen quickly packed up the drawings, got dressed, and said to Commander Wei.

"Yes, but why is Your Majesty looking for this?" Commander Wei said in confusion.

Chen Chen smiled: "Ah yes, I plan to produce new means of transportation, and now that there is steel, there is a rubber tire, so I have to find this thing, and then make rubber tires." ”

"It seems that Your Majesty has a new understanding, and the minister will wait and see." Commander Wei said in surprise that all kinds of small products that have been popular on the market recently are all the handiwork of His Majesty, and these products are very popular among the people, and it seems that this product will be even more eye-catching this time.

Chen Chen finished his meal quickly, and then went straight to the forest with Commander Wei and his men.

"Your Majesty is looking for a plant today, everyone should keep a snack, if you find it, Your Majesty will have a lot of rewards." Commander Wei looked at the soldiers with puzzled expressions and explained to them.

The soldiers were extremely excited when they heard this, and they swept away the dejected expressions on their faces, thinking that they would continue training when they came to the forest, but they didn't expect to help His Majesty find a tree, just look for it, as long as you don't need training, then it's fine.

Everyone began to look for them in the forest, but Chen Chen stopped them and said, "Okay, don't look around, when will the vast forest sea find the leader?" Let me plan for you. ”

"Rubber trees like high temperature, high humidity, quiet wind and fertile soil, requiring an average annual temperature of 26~27C, in the range of 2O~3OC can grow and produce rubber normally, not cold-tolerant, and suffer from frost damage below the temperature of 5C. The average annual precipitation is required to be 115o~25oo mm, but it is not suitable for planting in low humidity places. It is suitable for the growth of deep, fertile and moist acidic sandy loam soils with good drainage. Shallow roots, the branches are fragile, the adaptability to the wind is poor, and the susceptibility to wind cold and reduce the amount of rubber produced. ”

Chen Chen explained to the soldiers well, and the soldiers immediately understood: "It turned out to be in this place!" That's great, we always pass through these places when we train, and we have seen such a plant in these places, and the trees have milky sap, and these saps become a soft thing in the air for a long time. ”

When Chen Chen heard this, he said excitedly: "Yes, then go over quickly." ”

Everyone took Chen Chen to this place quickly, Chen Chen looked up and saw that the trees in front of him were big trees, up to 3o meters high, with rich milk.

finger-like compound leaves with 3 leaflets; petioles up to 15 cm long, with several glands at the apex; leaflets elliptic, 1o-25 cm long, 4-1o cm wide, apex short-pointed to acuminate, base wedge-shaped, entire, glabrous on both sides; lateral veins 1o-16 pairs, reticulated veins distinct; The petioles are 1-2 cm long. Inflorescences axillary, conical, up to 16 cm long, covered with grayish-white pubescence; wooden; The seeds are oval, pale grayish-brown, marked, and indeed a rubber tree.

Looking at the sap on the trunk again, Chen Chen reached out and touched it, and sniffed it with his nose: "Hahaha, it's really a rubber tree, come on, collect it quickly." ”

Everyone was stunned in place, how to collect this rubber, they won't.

"Cut a small longitudinal spiral groove from the rubber tree pole, install a diversion nozzle at the bottom of the groove, and place a collection vessel under the deflector. In this way, a viscous white liquid flows out of the cut trough and falls into the collection vessel through the guide nozzle. That's how rubber is collected! Chen Chen said to his entourage.

"Yes, Your Majesty." The soldier understood the method, and immediately began to do as instructed, and soon collected several buckets of rubber.

After preparing the rubber, Chen Chen took the rubber back and began to make rubber tires, which is still more troublesome to make and requires several processes.

Process 1: Mixing process

The mixing process is to mix carbon black, rubber, oil, additives, accelerators and other raw materials together, and process them in the internal mixer to produce rubber compound, the composition of rubber material depends on the requirements of tire performance, and at the same time, the change of rubber composition also depends on product requirements, which mainly come from traction, driving performance, road conditions and the requirements of the tire itself. All compounds are tested before they are released before they can be released before they can be tested before they can be put into the next process.

Process 2: Preparation of glue parts

The glue part preparation process consists of 6 main sections. In this process, all the semi-finished rubber parts that make up the tire are prepared, some of which are preliminarily assembled.

The six sections are:

Section 1: Extrusion

The compound is fed into the extruder head and thus the different semi-finished rubber parts are extruded: the tread, the sub-mouth and the triangle strip.

Section 2: Calendering

The raw cord passes through the calender and a thin layer of rubber is hung on both sides of the cord.

Section 3: bead forming

The bead is made of many steel wires after hanging glue winding, the rubber material used for the bead has special properties, when the vulcanization is completed, the rubber material and the steel wire can be tightly bonded together.

Section 4: Cord cutting

In this process, the cord is cut to the appropriate width and fitted with joints.

Section 5: Paste triangular rubber strips

In this process, the triangular strip extruded by the extruder is manually attached to the bead.

Section 6: Belt layer forming

This process is used to produce the belt layer. In the spindle room, many steel wires come out through the threading plate, and then pass through the mouth plate at the same time with the rubber compound to make the steel wire hang glue on both sides. After hanging glue, the belt layer is cut to the specified angle and width. The width and angle size depend on the tire size as well as the construction requirements.

Process 3: Tire building process

The tire building process is to assemble all the semi-finished products on the molding machine into green tires, which here means that they have not been vulcanized. After the green tire is inspected, it is transported to the vulcanization process.

Process 4: Vulcanization process

The green tires are loaded onto a vulcanizing press and subjected to the right amount of time and conditions in the mould to be cured into finished tires.

Process 5: Final inspection process

In this area, the tires are first visually inspected, followed by a uniformity test, which is done by means of a "uniformity testing machine". The uniformity testing machine mainly measures radial force, lateral force, cone force and fluctuation situation. After the uniformity test, a ****** test is done.

Process 6: Tire Testing

In the process of designing new tire specifications, extensive tire testing is a must.

This time, in order to make tires, Chen Chen also spent a long time and effort and financial resources to upgrade the facilities of the factory again. (To be continued.) )