Internal cooling device of tubular thin film production equipment

Abstract

An internal cooling device of tubular thin film production equipment comprises a mold, a cold air inlet pipe and a hot air exhaust pipe, wherein the cold air inlet pipe and the hot air exhaust pipe are arranged in the mold; and the device further comprises a cold and hot air reversing element and a freezing water pipe. The cold air inlet pipe is sleeved with the hot air exhaust pipe, and the hot air exhaust pipe is arranged in the mold; the cold and hot air reversing element is arranged on the mold and is communicated with the cold air inlet pipe and the hot air exhaust pipe, so that inner pipe cold air inlet and external pipe hot air exhaust are achieved; and the freezing water pipe is spirally arranged inside the cold air inlet pipe. Through improvement of the structure, the internal cooling device has the beneficial effects of being simple and reasonable in structure, excellent in performance, low in manufacturing cost, easy to produce and implement, good in cooling effect, high in production efficiency, uniform in thickness of a produced thin film, high in transparency and the like, and practicability is high.

Description

technical field [0001] The invention relates to a tubular film production equipment, in particular to an internal cooling device of the tubular film production equipment. Background technique [0002] Tubular film production equipment is a production equipment that heats and melts plastic particles and then blows them into films. Therefore, the film needs to go through a cooling and shaping process before winding. If the cooling of the film is natural cooling at room temperature, since the room temperature is relatively high, generally around 20°C, and has certain fluctuations, the cooling of the film at room temperature is actually neither complete nor uniform. The shrinkage coefficient of the film after rolling is far beyond its theoretical value, resulting in serious uneven thickness of the film after the final shrinkage, which is the so-called NG (nogood) product, so a special treatment for the film is required. Cooling cooling unit. [0003] At present, the main cooli...

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Problems solved by technology

If the cooling of the film is natural cooling at room temperature, since the room temperature is relatively high, generally around 20°C, and has certain fluctuations, the cooling of the film at room temperature is actually neither complete nor uniform. The shrinkage coefficient of the film after rolling is far beyond its theoretical value, resulting in serious uneven thickness of the film after the final shrinkage, which is the so-called NG (nogood) product, so a special treatment for the film is required. cooling unit for cooling

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