France developed a new giant tunnel excavator

Bouygues Construction and NFM Technology of France jointly designed a tunnel excavator with a diameter of 14.87 meters and a length of more than 7,000 meters. Its main features are less damage to the environment, low construction costs, strong project schedule control, and excellent safety.
According to reports, the excavator is like a submarine and its direction has always been controlled by a laser-sensing navigation device. The data recorded by all the work of this giant tunnel excavator will be transmitted to the ground computer in time, and about 600 pieces of data will be transmitted through the optical fiber network every second.
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The working principle of an injection molding machine is similar to that of a syringe used for injection. It uses the force of a screw (or plunger) to inject a plasticized molten state (ie, viscous flow state) into a closed mold cavity. After curing and setting, the process of the product is obtained.
Injection molding is a cyclic process, and each cycle mainly includes: quantitative feeding - melt plasticization - pressure injection - mold cooling - mold removal. Remove the plastic parts and then close the mold for the next cycle.

Injection molding machine operation items: Injection molding machine operation items include control of the keyboard operation, electrical control system operation and hydraulic system operation in three aspects. The injection process, the feeding action, the injection pressure, the injection speed, the ejection type selection, the temperature monitoring of each barrel section, the injection pressure, and the back pressure adjustment were performed.

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