What is a bottle blowing machine

A blow molding machine is a device that uses blow molding technology to make plastic particles into hollow containers. Currently, common models include:usePPandPEA hollow extrusion blowing machine for one-time molding, usingPET、PCorPPTwice molded injection-pull-Blow molding machines and newly developed multi-layer hollow extrusion and stretch blow molding. At present, most bottle blowing machines are still two-step blowing machines, which means that the plastic must be made into a preform first, and then blown. The commonly used ones nowadays arePETEnvironmentally friendly plastic material.

Production process of blow molding machine

In the production of blow molding machines, it is well known that thermoplastic resins are extruded or injection molded into tubular plastic preforms. While they are hot (or heated to a softened state), they are placed in a split mold. After the mold is closed, compressed air is immediately introduced into the preform to blow it and make it tightly adhere to the inner wall of the mold. It needs to be cooled and demolded to obtain various hollow products. In order to make the product smooth without water bubbles and achieve aesthetic appearance, and to increase the quantity of products.

Requirements for refrigeration in the production of bottle blowing machines

Cooling of preform mouth:In the preheating stage of the preform, the preform is irradiated by an infrared high-temperature lamp, and the body of the preform is heated and softened. In order to maintain the shape of the bottle mouth, the preform mouth does not need to be heated, so a certain cooling device is needed to cool it;

Compressed air drying:Blowing bottles requires clean and dry compressed air, and the use of chilled water provided by industrial chillers as a cold source can remove moisture from the compressed air;

Mold cooling:The chiller can accurately control the temperature of the mold,Timely absorption of heat, rapid reduction of mold cavity temperature, acceleration of product shaping, improvement of product quality, and enhancement of production efficiency; Failure to cool down in a timely manner can result in a decrease in product quality: defects such as lack of fullness, uneven wall thickness, dull color, and inability to form.

What bottle blowing machinery is used with a chiller:Guangzhou Lingjing Refrigeration Equipment Co., Ltd. specializes in producing a bottle blowing cooling equipment-The specialized chillers for bottle blowing machines are commonly known as freezers, coolers, chillers, ice water machines, and refrigeration machines.

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The principle of using a chiller for a bottle blowing machine:According to the principle of refrigeration system, the low-temperature and low-pressure liquid refrigerant exchanges heat with the surrounding water in the evaporator. The evaporator absorbs the heat of water and evaporates into a low-temperature and low-pressure gas state. During the evaporation process, the temperature of the refrigerant remains unchanged. The low-temperature and low-pressure gas refrigerant enters the compressor, which compresses it into a high-temperature and high-pressure gas state. Then it enters the condenser and exchanges heat with the indoor medium in the condenser. Part of the heat of the high-temperature and high-pressure gas state is absorbed by the medium, and the medium temperature increases. The refrigerant releases heat and the condenser becomes a high-temperature and high-pressure liquid state. The condenser process temperature remains unchanged, and then enters the expansion valve for throttling. Throttling is a rapid cooling process, and the refrigerant becomes a low-temperature and low-pressure liquid state. After this process, the refrigerant enters the evaporator for heat exchange and evaporation, thus realizing the refrigeration system. The entire process, This cycle is continuous, allowing water to cool continuously; (Simply put, it is the conversion of thermal energy using refrigeration or cooling. The refrigerant (refrigerant, snow) in the evaporator of a chiller absorbs the thermal energy of water, and the compressor provides power to the refrigerant (refrigerant, snow). The refrigerant (refrigerant, snow) flows to the condenser of the chiller, and the thermal energy of the refrigerant is carried away by the cooling water (water-cooled chiller) or wind (air-cooled chiller).)