High-temperature blow molding machine - a tool for hot beverage filling

As we all know, ordinary PET plastic bottles (such as mineral water bottles) encounter high-temperature liquids, will shrink deformation, and even produce odors, which to a large extent limit the development of hot-filled beverages. In order to solve this problem, many blowing equipment suppliers in the world are committed to the development of blowing equipment suitable for the production of PET heat-resistant bottles, and Magge Machinery is not far behind.

Recently, Maige Machinery made the MG-HR series two-step high-temperature blow molding machine specifically for the production of PET heat-resistant bottles based on the relevant technical demonstrations of the physical properties of heat-resistant bottles. The heat-resistant PET bottles are widely used in production. Juice, tea and other hot-filled beverage packaging. Compared with some foreign two-step heat-resistant bottle blowing equipment, MEGGER's HR series high-temperature blow molding machines can provide users with the most advantages from preform design, preform preparation to fully automatic stretch blow molding machines. Cost-effective, is the best choice of equipment for medium-sized beverage companies.

MG-HR Series Blow Molding Machine Can Well Realize Heat-resistant PET Bottle Production

As we all know, in the high-temperature filling process, long-term high temperatures can seriously affect the molecular structure of PET, resulting in deformation or discoloration of PET bottles. Magge's HR series high temperature automatic blowing machine is based on PET characteristics (with the crystallization The rise in heat resistance is correspondingly increased.) Specially designed and manufactured. It uses multiple blow molding techniques to reduce the memory residual stress in PET raw materials, ensuring that the produced PET bottles do not shrink or deform slightly during hot filling. At the same time, since the crystallinity of the PET bottle has good uniformity, the PET container molded by this method has better heat resistance and pressure resistance, and the time for storage is also increased accordingly.

In addition, for PET hot-fill bottles, hot-filling preforms is also an important factor. The preform injection cooling time requires strict control and the preform should be released as soon as possible. At present, there are two kinds of thread heads used widely in hot filling preforms: crystal thread heads and non-crystal thread heads, and the density of thread heads of relatively non-crystallized PET hot-filled bottles requires a little higher, and therefore a few years ago Grid Machinery has developed a PET preform mold for semi-pneumatic needle valves that are suitable for non-crystallized thread heads. At present, the Mage HR series blow molding machine adopts the patented loading preform method, which makes the preform into the drying tunnel faster and more reliable. Also, it is very easy to change the preform's diameter (change within a small range) as needed. This type of machine uses a blow-up design to maximize the quality of the preform after heating, and indirectly ensures the stability of the final molded bottle. The molded bottle can be directly transported to the hot filling line for hot filling. This saves production time, speeds up production, and increases production.

The new heat-resistant bottle production equipment adopts a multi-blow molding technology—a molding method of over-extension, heat-shrinking, and heat-setting, which makes the PET heat-resistant bottle produced by this machine stable and reliable. The equipment uses multiple processes to increase crystallinity and uses multiple blowing platform technologies, so it does not reduce the production speed of PET bottles and relatively more effectively controls production costs. The mechanical action of the equipment in synchronization with the process ensures a shorter molding time and higher production efficiency of the bottle. In addition, the product can be fully crystallized and has a high heat resistance. The product can be applied to hot filling at 92°C. (Theoretically it can exceed 100°C). It is worth mentioning that this series of bottle blowing machines can effectively change the crystallinity of PET bottles according to different shapes of mold design. With the increase of PET crystallinity, the high temperature capability of PET bottles can be increased to over 100°C.

The new generation of high-temperature blow molding machine from Maige has the following features:

1. When the output is equal to the ordinary type blowing equipment In order to ensure the heat resistance of PET bottles, the ordinary hot filling blowing machine requires a high pressure molding time to ensure the high crystallization rate of PET, and the use of the MAG series HR bottle blowing Multi-cavity design, the temperature control of each cavity, respectively, effectively reduce the high-pressure blowing time, but also to ensure a uniform high degree of crystallinity of PET bottles, so that the blow-blow the output of the same as ordinary blowing machine.
2. The use of advanced blowing mode Compared with the blowing mode, blowing mode has more advantages. Because the hot-filled preforms are relatively heavy, the preforms softened by the drying tunnel are less prone to deflection in the up-blowing mode, so that the preforms are heated evenly and the yield is improved.
3. Improved drying tunnel design Improved drying tunnel design reduces the heating gap between preforms. And the use of foreign imports of strong heat radiation lamp, shorten the heating time of the preform, the use of thermal energy to effectively improve, but also shorten the length of the corresponding drying tunnel. The automatic cooling system in the tunnel ensures a constant set temperature.
4. Relatively low air source requirements General PET heat-resistant bottle blowing requires the use of a circulating air blowing device and high-pressure heating to ensure the PET bottle is shaped, and the air consumption is relatively large. After the blow molding process is modified, multiple cavity blowing is used, and the temperature is low. System, high temperature crystallization, simultaneous mechanical action, reduce air consumption and reduce air pressure requirements.
5. New type PLC system The new generation of high temperature resistant series adopts domestic advanced PLC control, which simplifies the operation of the blowing machine and monitors the process of production tracking. Machine setup and maintenance, all automatic tracking, and can analyze the reasons for the shutdown, so that the system can be restored to run faster.
6. Shrinking the floor space The electric control system is built into the machine. The reduced preform drying path thus significantly reduces the original size of the blowing machine. The new loaded preform method makes the bottle blank into the drying tunnel faster and more reliable. The smaller device reduces the footprint of the device and allows the customer more room to set up additional devices.

Source: Packaging Machinery