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Blow molding is mostly used in thermoplastics. The tubular plastic blank obtained by extrusion of the plastic is placed in the split mold while it is hot, and the air is compressed in the blank immediately after the mold is closed to inflate the plastic blank and stick to the inner wall of the mold, and various hollow products are obtained by cooling and demolding. First, the molten plastic is placed in the mold, and under compressed air pressure, the plastic is blown up and pressed against the inner surface of the mold. It is washed and demolded into products. Blow molding is mostly used in the production of various hollow packaging containers, but also can produce films, flakes, etc. The quality of blow molding requires balanced thickness, uniform weight, consistent color, smooth surface, and complete compliance.
The effect of moisture on the product: When plastic blow molding is exposed to air, it will absorb moisture. The amount of moisture absorbed depends on the type of polymer, the humidity of the surrounding air, and other factors. If too much water is absorbed, it will affect the function of the processing machinery, the surface quality of the processed product, and even the physical and structural function of the product.
For most materials, a small amount of water will change the melt viscosity of the polymer, which in turn will affect the processing method of the polymer. When polymers such as polycarbonate and polyester are heated to temperatures above the melting point, at this point, a small amount of water inside or on the surface of the particles will cause a chemical reaction, which may degrade the polymer, changing its molecular weight, melt viscosity and mechanical strength, and more water will lead to the formation of bubbles, holes and streaks inside the product. Therefore, the drying process before molding is crucial.
The presence of plastic moisture will usually have a harmful effect on the performance of plastics and molding processing, and water will vaporize at high temperatures, so that products produce bubbles, spray marks, surface silver filaments and other defects, so plastic moisture content is an important factor affecting the processing technology of plastics, product appearance and product characteristics, drying links can not be ignored.
The dew point of the dehumidifier can reach -70 °C, shorten the drying time, improve the drying efficiency, and the residual moisture content can be less than 20ppm.
Domestic dryer with SCADA technology, remote control, adjustment of technical parameters according to the actual situation, online detection, and prediction of faults in advance.
Dew point switching technology can set different dew points according to the drying requirements of different materials, minimizing energy consumption.
Compared with the same output of honeycomb dehumidifier, Jinyue molecular sieve dehumidifier saves 18%-60% in energy consumption. (This is based on thousands of experimental reports and feedback from customers, testing real data)
Compared with the Jinyue standard molecular sieve dehumidifier, the Jinyue modular dehumidification dryer saves about 25% energy consumption.
| Production traceability | Remote after-sales service | Anticipate failures | Dew point switching | Energy consumption detection | Modular design |
|---|---|---|---|---|---|
| Restore production information, real report assured and reliable information real-time feedback. | The system automatically and manually analyzes to solve problems in a targeted manner. | Dozens of detection points, real-time detection, data abnormality, timely feedback, key locations, alarm reminders. | The minimum dew point reaches -70°C, and the dew point can be set flexibly, which is energy-saving and efficient. | Each device is equipped with electricity meters, mobile phones, computers, and equipment can be observed at the same time. | Multiple identical module dryers that work independently and do not affect each other. Multiple modules share an independent electronic control system, using Profinet communication, quickly connect to form a system. |
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