Meg High Temperature Blow Molding Machine - A Tool for Beverage Hot 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 developing blowing equipment suitable for producing 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 temperature will seriously affect the molecular structure of PET, resulting in deformation or discoloration of PET bottles. Magge's HR series of high temperature automatic blowing machine is based on PET characteristics (with The increase in the degree of crystallinity correspondingly increases the heat resistance.) It is 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, hot fill preforms are also an important factor for PET hot fill bottles. 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 semi-pneumatic needle valve PET preform mold that is suitable for non-crystallizing screw 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 output.

The new heat-resistant bottle production equipment adopts a multi-blow molding technology, which is a heat-shrinking and reheat molding method after over-stretching, making 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, ordinary hot-fill bottle blowing machines require high pressure molding time to ensure high crystallization rate of PET. The Mage HR series of blowing bottles use multiple cavity design, and each mold cavity temperature is controlled separately. , Effectively reduce the high-temperature blowing time, but also to ensure a uniform high degree of crystallinity of PET bottles, so that the output of blowing bottles is equivalent to ordinary blowing machine.

2, using advanced blowing mode

Up blowing mode has more advantages than down blowing mode. 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

The improved drying tunnel design reduces the heating gap between preforms. And the use of foreign imports of intense heat radiation lamp, shortened the bottle of bad heating time, the effective use of heat energy, but also correspondingly shorten the length of the drying tunnel. The automatic cooling system in the tunnel ensures a constant set temperature.

4, relatively low gas source requirements

The 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, low-temperature blowing, high-temperature cleaning, and cleanliness. Simultaneous mechanical actions reduce air consumption and 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, reduce the space

The electrical control system is built into the machine, so that the original bottle blowing path can be significantly reduced in size, and the new way of loading preforms can make the bottle blank into the drying tunnel faster, more reliable, and smaller, reducing the The footprint of the equipment allows customers to set additional equipment.

Source of information: pack.cn