In recent years, with the continuous improvement of the industrial level, the requirements for packaging in various industries are also increasing. Whether it is the packaging of foods and pharmaceuticals that are closely related to the public life, or the packaging of hardware and building materials and industrial equipment that are indispensable in the industrial field, the market calls for a better preservation and more material-saving packaging form, so it is a new one. Technology - vacuum packaging came into being. Although the development of this technology is gradually diversified, the general workflow is still the following: (2) Medical vacuum packaging machine: The above picture is an exquisite aseptic packaging machine, which adopts special vacuum system and exhaust device, which is especially suitable for purification in electronics, food, medicine and other industries in dust-free aseptic workshops, etc. Use in higher places. At the same time, the form of vacuuming is more conducive to the preservation of such products for a longer period of time, without contact with air, to completely eliminate secondary pollution. At the same time, such equipment can also be applied to food packaging with aseptic requirements, achieving good results. (3) According to the product demand, the corresponding function increase: Because the application of vacuum packaging has a clear purpose: anti-mildew, dustproof, moisture-proof, quality assurance, etc., when dealing with products of different natures, the composite function should be increased. For example, when the food is vacuum packed, the cooling system should be added as recommended above; when the medicine is packaged, it is equipped with a sterilization system; when the electronic product is packaged, it is equipped with moisture-proof and anti-oxidation control; for textile packaging, attention should be paid to its fine cotton fiber. and many more. In addition, the inflating function has been basically accepted and applied by the industry. Functionality similar to this type should also be developed. These are just some of the immature views of the individual. I hope that I can communicate with you through simple analysis. In the face of the complicated vacuum packaging machine market, both enterprises and consumers need a step-by-step process. A small suggestion when purchasing: Users should not only distinguish the vacuum packaging machine from the model, but also pay attention to the following aspects: the sealing length of the packaging machine, the double row spacing, the maximum available height of the vacuum chamber, and the production efficiency of the whole machine. High and low and so on. I believe that this will definitely be able to choose a satisfactory device.
In fact, as early as the 1940s, vacuum packaging technology was born in the laboratory, but as many new things have not been taken seriously when they first appeared, people once doubted whether it has the necessity of existence. Fortunately, with the entry of composite materials such as polyester and polyethylene around 1950, this technology ushered in its own spring and quickly developed.
1. Vacuum: The vacuum chamber is closed, the vacuum pump works, the vacuum chamber starts to vacuum, the vacuum inside the packaging bag, the vacuum gauge pointer rises, reaches the rated vacuum (controlled by the time relay ISJ), the vacuum pump stops working, and the vacuum stops. While working under vacuum, the two-position three-way solenoid valve IDT works, heat seals the chamber vacuum, and the hot press holder remains in place.
2. Heat sealing: IDT is broken, the outside atmosphere enters the heat sealing chamber through the upper air inlet hole, and the pressure difference between the vacuum chamber and the heat sealing chamber is utilized, and the heat sealing chamber is inflated and expanded to be placed under the hot pressing frame. Move, press the bag mouth; at the same time heat seal the transformer work, start sealing; at the same time, the time relay 2SJ works, after a few seconds, the heat seal is over.
3, return air: 2/2-way solenoid valve 2DT pass, the atmosphere enters the vacuum chamber, the vacuum gauge pointer returns to zero, the hot press frame is reset by the return spring, and the vacuum chamber is opened.
4. Circulation: Move the above vacuum chamber to another vacuum chamber, that is, enter the next working process, and the left and right chambers work alternately and reciprocate.
Among the 100 packaging machine manufacturers in the country, the types of vacuum packaging machines are also varied. The following is a simple analysis by purpose:
Food vacuum packaging machine
(1) Food vacuum packaging machine: Most of today's packaging machines in China are servo motor drives, and more advanced ones will be equipped with color screen touch for easy operation. At the same time, because such products have high requirements for preservation, the temperature should be controlled before vacuum packaging, and the equipment has its own cooling system; sometimes it is equipped with an inflation system based on vacuum, which can be filled with inert gas such as nitrogen. To achieve better quality results.
Sterile vacuum packaging machine
Electronic vacuum packaging machine
(3) Electronic product vacuum packaging machine: The above picture is a typical electronic product packaging machine, suitable for electronic products, such as semiconductors, crystals, PCBs, can play the role of internal metal processing parts moisture, oxidation and discoloration, etc. effect. Vacuum packaging reduces packaging volume and saves logistics costs. At the same time, it is also possible to vacuum the large and fluffy objects such as cloth wool textiles. In addition, this type of machine can also make the finished product have anti-shock characteristics, thus protecting the precision instrument.
Although these mechanical devices have been greatly improved in terms of functional technology, I believe that it should be improved in the following aspects:
The first is the functional improvement of the overall device:
(1) Improve efficiency: Most of the companies that are known are in the efficiency of 3 to 4 times per minute. This is naturally also due to the complexity of the vacuuming process. But in the face of the industrial efficiency of today's high-speed operation, it really seems to "can not keep up with the pace." So this should be the direction for industry manufacturers to improve over time.
(2) More adaptability: Since the volume of packaged items sometimes varies greatly, it requires better compatibility of vacuum packaging and can meet the needs within a certain range. Naturally, users will be more willing to purchase such products from an economic perspective.
Followed by the specific needs of the equipment:
(4) Application of related high-tech technologies such as automated electrification: The author believes that this is an industrial trend, no matter which modern industry is “all reasonableâ€. This technology also brings another benefit in the vacuum: safety and hygiene. In some of the products of the prophetic enterprise, the operation of programmable control (PLC), color touch operation, and servo motor has been “aboundâ€. If the business is not aware of this, then in the near future it will be going to fall behind until it is eliminated.
Finally, some small household products should be developed to meet a wider range of needs:
(5) Work hard on household packaging machines: I have found that many vacuum cleaners with small size, functional and easy operation are available in the market (see the figure below), and their appearance meets people's daily lives. Requirements: such as saving food, saving bedding, etc. Especially for the preservation of cotton and linen fabrics, it greatly saves space after vacuuming, and is very popular among users. Only such products have not been paid special attention by the public, but they should be a good development direction.
Household vacuum packaging machine