The form of mouth bag in soft package
1. Bag form 1) flat bag: two layers of film, three sides sealed, leaving one side filled and then sealed. 2) Self supporting bag: two layers of film, heat sealing on both sides, bottom adding bottom, upper filling sealing, standing. 3) Penguin bag: both sides of the film are inserted and welded, the lower side is sealed, and the upper part is filled and sealed. It can stand. 4) Irregular bag: large irregular flat bag or self-supporting bag.
2. Mouth adding form: 1) the upper part of the flat bag (such as non PVC infusion bag) 2) the middle part of the flat bag (such as the bag in the box) 3) the mouth in the middle of the self-supporting bag and Penguin bag. 4) Self standing bag with mouth on the slant side.
Processing equipment: 1. Three side sealing bag making machine; 2. Self supporting bag making machine; 3. Special shaped bag making machine; 4. Self supporting bag mouth sealing machine; 5. Self supporting bag slanting edge mouth sealing machine; 6. Filling machine; 7. Bag making, mouth adding, filling and capping machine; 8. Bag making and mouth adding machine; 9. Mouth and filling machine.
There are four processing methods from bag making, nozzle adding and filling

(1) After film making, it is completed on the production line: unwinding, bag making, printing, nozzle adding, filling, capping or sealing after filling. In the first process, only one kind of equipment is used for bag making, printing, welding nozzle and filling after film making. This equipment has a lot of work to complete and integrates many functions into one machine, which can ensure the quality and cleanliness requirements of products. High degree of automation and high production efficiency. Suitable for fixed variety or single variety, mass production. The general bag form is a plane structure, similar to the four side sealed bag type, the pattern is simple, generally hot stamping or pad printing, with high requirements for mouth. This kind of machine is suitable for customers of final products. Such as food factory, daily chemical factory, pharmaceutical factory, such as non PVC infusion packaging machine. However, this kind of machine also has some factors, such as high price, difficult to match the productivity of various functions, complex maintenance, high requirements for the heat sealing performance and size consistency of the film and nozzle, large equipment, high cost of commissioning and shutdown, which limit its application. The key problem to be solved by this machine is the welding quality of the mouth and bag. (2) The film making, printing, bag making, mouth adding, filling, capping or filling and sealing are completed independently by different machines. The equipment used in the second process (film making and printing) includes bag making machine, nozzle adding machine and filling machine. Each completed a relatively simple, single function. It can be selected by different manufacturers. It can give full play to the functions and efficiency of various machines. The price is relatively cheap and easy to use and maintain. This is the most commonly used process at present, which can make mouth bags with exquisite printing and different shapes. This will be discussed in more detail later. (3) After film making and printing, it is completed on the production line: unwinding, bag making, nozzle adding, and then filling machine. The equipment used in the third process, in addition to film making and printing equipment, also uses bag making, mouth adding machine and filling machine. Among them, the bag making mouth adding machine is the key equipment, which can meet the requirements of high-definition cleanliness. This kind of machine can be selected by flexible packaging factory and food factory (or other factories). The typical representative of this kind of machine is bag in box plus mouth bag making machine. This kind of equipment is manufactured in Canada, Zhongshan, Guangdong, China and Shanghai.

The problems to be paid attention to and solved are the welding quality of the automatic nozzle and the deviation of the film after the nozzle is added. (4) After bag making, the production line is equipped with nozzle, filling, capping or filling and sealing. In addition to the bag making machine, the main equipment used in the fourth process is the nozzle, filling, capping machine or filling, nozzle heat sealing machine. This kind of machine is suitable for packing factory, and it is more common in foreign countries. 2. The following focuses on the various equipment involved in the second process and selection. (1) self supporting mouth bag making machine can be selected according to needs. Ordinary bag type equipment is general equipment. It has been produced by many domestic enterprises. There are various models and grades of products to choose from. The special-shaped bag making machine is more complex, and the domestic products are rare at present. It is said that some manufacturers use the ordinary bag making machine to install special-shaped heat seal and special-shaped die-cutting device to produce special-shaped bags for various market demands. This is also an economical and simple way. Foreign countries have a very mature special-shaped bag making machine for selection. But the price is more expensive, if the market needs, it can be regarded as a quick choice. (2) There are many factors restricting the selection of nozzle adding machine, and the most important one is the use. In order to use conveniently, can guarantee the quality (heat sealing quality, cleanliness) as the first priority, design should pay special attention to. At present, the common soft packaging bags with mouth on the market are summarized and analyzed as follows: 1) for CICI jelly products, the self-supporting bag with longer suction nozzle in the middle can be selected. Because most of these products are used in food, they need to be printed in large quantities. They require high quality and cleanliness of the nozzle. After filling, they need to be steamed and disinfected. Now basically, the second process mentioned above is adopted. This kind of welding nozzle machine can select the automatic welding nozzle machine with fixed suction nozzle and self-supporting bag for welding. There are two types of welding nozzle machines in Japan, i.e. linear type and rotary table type, with the production capacity of 30 per minute and 2 types of 60 nozzles. It is said that the effect is good. Zhongshan XINHONGYE Automation Industry Co., Ltd. has independently developed a straight mouth mouth mouth sealing machine nca1601-30, which is especially suitable for the self-supporting mouth adding bag for CICI jelly products. The suction nozzle of the packing bag is fixed, and the bag form and size have certain changes. The machine can complete the functions of automatic nozzle feeding, plastic nozzle preheating, automatic bagging, three position heat sealing, one-time cold setting, automatic offline, and automatic queuing of finished products to the plastic tank for filling machine. Compared with foreign machines, this machine has the following differences. A. The upper mouth system is simple and reliable. The plastic nozzle is horizontally positioned and clamped by a manipulator, and the plastic nozzle is vertically sheathed on the traveling nozzle seat. The nca1601-30 machine is directly lined up with a vibrating disc and positioned vertically. The plastic nozzle is pushed vertically onto the accompanying nozzle seat by the cylinder propulsion system. B. In view of the problem that the heating of plastic nozzle during welding needs to be carried out through the packaging bag, the heating speed is slow, and the bag is easily damaged. Nca1601-30 machine specially preheat the plastic nozzle before the heat sealing of the bag, so as to facilitate the better sealing in the following sequence. C. The offline design is more reasonable and reliable. The off-line part of nca1601-30 machine is designed as follows: the finished bag is detected by photoelectric eye, and the unqualified products are first discharged, and then the qualified products are pushed into a finished plastic track slot according to the required number. The plastic tank can also be automatically discharged and replaced, making the operation easier and convenient for automatic filling. Nca1601-30 machine has been used by dozens of customers at home and abroad for several years and several improvements made by manufacturers. At present, the machine can be used for processing various specifications of four side seal, self-supporting bag, Penguin bag and mouth bag with length of 100-200 mm and width of 70-130 mm. The plastic nozzle used in this machine is generally a long nozzle with a suction pipe or a half long mouth with a suction pipe. If a short nozzle without a suction pipe is used, the bag should not be too large, so as not to affect the surface quality after sealing due to insufficient rigidity in the processing process and make people feel that the sealing is not flat enough. If it is necessary to use a short mouth, the processing should be left and right guardrail, to improve its rigidity, or use a relatively strong bag. 2) Soft packing bag with angle and mouth. There are many specifications of this kind of soft packing bags, and the common ones on the market are: the length of 140 ~ 300 mm and the width of 90 ~ 200 mm. The mouth has a small mouth with thread. The diameter of the mouth of Manson series is 10 mm. At present, there are semi-automatic oblique nozzle sealing machine from Hansen company of Germany and full-automatic inclined nozzle welding machine of Japan tatani.

Each has its own characteristics, but the common feature is that the bag clamp is placed flat and welded with nozzle. This kind of welding nozzle equipment is most suitable for products with large bag and large plastic nozzle. Suitable for market detergents, clothing softener products. The characteristic of this kind of products is that most of them are daily consumer goods, which are granular or viscous liquids. It is suitable for filling from the unsealed side. It is not convenient to fill from mouth. The mouth is added at the oblique angle to facilitate dumping and repeated use. This kind of mouth bag is generally designed to screw the cover in advance. After welding with the bag, the upper part of the bag is not sealed for filling. After filling, seal the mouth. The welding nozzle machine at the oblique angle is also produced in China. There are now three categories of products. The first type is manual welding nozzle machine, which has the advantage of low price. The operation is simple, the investment risk is small, and the variety change is flexible. The disadvantage is that it is difficult to adjust the temperature and pressure to a very suitable point, and the sealing strength cannot be guaranteed. Another disadvantage is that it is difficult to accurately locate and clamp the bag and mouth during sealing, and the position of the nozzle is not easy to ensure. Secondly, the efficiency is relatively low. According to statistics, it is about 6 / min, which is difficult to meet the requirements of mass production. In addition, people take part in a lot of actions such as opening bags, plugging mouth, holding bags and welding, which is difficult to ensure the hygienic requirements of food packaging. It also limits its application. However, after the production practice of various manufacturers in recent years, there are also some good methods, which are put forward for everyone to share today. A. Preheat the plastic nozzle before heat sealing. The usual method is to make a heating ring or directly use an incubator to preheat the plastic nozzle to a certain temperature, wear gloves to take out the sealing part of the bag, and weld as soon as possible. This can improve the welding quality. B. Position and clamp the bag and bag mouth to ensure the welding position. C. The heat sealing knife is made into a single acting form, and the stationary side is silica gel. The moving side is a copper part to compensate for the inconsistency of welding nozzle size. The heat sealing is repeated twice to improve the heat sealing quality. To sum up, the manual welding nozzle machine is suitable for the situation of small batch, many varieties and less stringent requirements. Such as solid flower fertilizer, fish feed, etc. The second type of oblique angle welding nozzle machine is semi-automatic machine, which is characterized by strong applicability, good quality assurance and fast speed. It can be easily changed. It is especially suitable for special-shaped bags, large and small bags. But it is a pity that there are no mature products at home and abroad, which are left to be developed by equipment manufacturers. The third type of oblique angle welding nozzle machine is fully automatic, with bag filling, corner cutting, nozzle loading, welding, cold sealing and finished product counting. This kind of machine has been very mature in China. Nca1620-30 welding nozzle machine produced by Zhongshan XINHONGYE company is an example. Compared with foreign machines, the upper part of the machine is more simple, the angle of the mouth is more convenient to adjust, and the range is wider. The angle of the nozzle can reach 17 ° to 45 ° and can be added in the middle if necessary. The maximum bag size is 320 × 220mm (L × w). Bag clamping operation is more scientific. Magnetic belt clamping, reliable clamping, servo motor drive, more stable and accurate walking. The quality of three times heat seal, one time cold seal and heat seal is more reliable. The speed can reach 30 or more per minute. But at present, the same problems still exist in this kind of machine at home and abroad: 1) it can't process relatively large bags, and the largest bag processed is 300 × 250mm with 45 ° nozzle.
② It is required that the mouth bag should have a certain degree of straightness and smoothness, and should not be too soft, otherwise the incoming line and heat sealing of the bag will be affected.
To sum up, the automatic welding nozzle machine is suitable for the welding nozzle work of large bags with large batch and constant nozzle position and angle. Special attention should be paid to the fact that the cap is usually screwed first, while the side of the heat sealing bag is not sealed, so as to carry out the welding of pulling mouth and nozzle and subsequent filling.
With the development of the market, the demand of consumption is more and more diversified. The special-shaped bag has attracted the attention of some people with its unique shape and distinctive personality. In recent years, some special-shaped mouth bags have appeared in the market, and it is obvious that some development has been made. However, some large color printing factories in China have the manufacturing capacity of special-shaped bags. It is necessary to solve the problems such as many varieties, not too large quantity and difficult to add mouth into the bag. At present, the existing full-automatic straight nozzle sealing machine and beveled edge nozzle adding machine at home and abroad can not solve these problems. At present, manufacturers can only use hand motor for production. However, due to the well-known reasons, it can not guarantee the quality and quality of the products and can not meet the needs of the market. Zhongshan XINHONGYE company has newly developed a special-shaped bag semi-automatic welding nozzle machine nca1621-25. It is characterized by: using a long mouth or a short mouth with a bayonet, manually inserting the mouth into the bag sealing place, hanging horizontally on the accompanying mouth seat, and placing the bag on a follow-up belt. The second heat sealing and the first cold setting are carried out in turn. Count and send out finished products. It can solve the welding nozzle of special-shaped bag very well.
Conclusion to sum up, the selection of mouth bag equipment, to follow the following principles, first of all, to study the use of the product. The more important the product is, the more careful we should be. We must ensure the product quality and requirements as the first choice point. Secondly, it depends on the batch size of the product. The larger the batch size of the product, the higher the requirement of automation level. The reliability of equipment and production is the most important consideration for the selection of equipment. If the output is not large, hand motor can be used. Finally, we should consider the price of the product, the higher the price, we can consider the high-end equipment. On the contrary, we should be cautious. It is possible that the product will be updated. The equipment with low value should be selected at this time.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
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