When managing the production process of the paper bag machine, there are five management mechanisms that can help us, which is conducive to improving the quality of the paper bag machine. When making the paper bag machine, it must be made strictly in accordance with certain standards, and the production tools must be checked regularly. This not only improves the efficiency of the paper bag machine, but also avoids errors in the production.
The first point: Don’t make mistakes just because there are inspection tools. The inaccurate measurement of the inspection fixture will cause errors in the paper bags generated by all paper bag machines. To find a way to design your molds and fixtures so that workers can only place the workpieces to be processed in the only and correct way that you design and have no other choices. Let the mold or fixture control the operation of the worker, don't expect the worker to control the mold or fixture. Because no matter how many times you tell workers what to do, some people will listen, but most people won’t. Regarding the inspection of the machine and equipment of the calibration fixture every day as a work that must be done, a responsible person must be assigned, and a work that must be personally inspected by the department head, and records must be kept.
The second point: Don't guess in your daily management work, no matter when you ask what kind of questions, you will almost always get the appropriate answer, however, in fact, no one really knows the truth of the problem. Don't simply take the response you get as the correct answer. You must train your employees continuously and witness with your own eyes that they are doing things right. Internal audits must be conducted and a comprehensive internal audit system must be established to ensure that workers comply with the factory’s standard operating procedures. The laboratory test in the factory must be scientific and reliable, and the test record must be able to trace the parts and products on the production line according to the test date and batch number, otherwise, the test results of the laboratory are the same as the sample test Up. If they cannot reflect the quality level of mass production, the significance of testing will be lost, and the quality of mass production will lose its guarantee.
The third point: the perfect paper bag machine standard
Regardless of whether your customers require it or not, you should adopt high standards for yourself, and don't make excuses for your failure to make a "perfect" product. Even if some products are not 100% perfect due to hand-made reasons, if you use this reason to lower the standard, then everyone in your subordinates will lower their standards. If your goal is 100% perfection, and you work hard in accordance with this goal from all aspects, the quality of the final product will be more in line with the goal of 100% perfection. Pursue high standards, abandon low standards, start with you, from managers at all levels to ordinary workers, change their concepts, learn to set and pursue high standards
Fourth point: 5s work area standard
This is an old-fashioned problem. It separates the work areas that are prone to product dust from those areas that must be kept clean, and requires all workers to wash their hands after eating and going to the toilet before returning to work. Wear a hair cover or a work cap before starting to work to prevent hair from falling on the product. In certain specific processes, all workers, including management personnel, are required to wear gloves to ensure that the work area is free of rats and insects. Before the end of the work day, give workers 10-15 minutes to clean up their work area (cleaning time is included in working hours and paid). In this way, they can work in a clean environment when they go to work the next day, and they can develop good site cleaning management habits for workers.
Fifth point: A reasonable working environment will reduce staff errors
Don't expect workers to control the environment, and don't expect workers to obey. Appropriate methods are adopted to make workers’ work easier and easier, so as to improve product quality, enhance product process stability, reduce errors, and install pads on all work surfaces, carts, shelves, etc. Reduce damage to parts and products during online assembly and packaging. If the liner is worn out, it must be replaced in time. The liner must be protected where it is needed, and it cannot be found in some places, and in some places, it is necessary to do everything required and check it in place . Provide workers with suitable and good-quality tools so that they can do their work well, and ensure that workers’ workstations have good lighting so that they can see clearly what they are doing.
Sixth point: Excellent on-site feedback mechanism
This means that you should allow and encourage your workers to speak, provide opinions, point out problems, and don’t let employees think: "Only the boss can speak" or "The boss is always right." Encourage and reward your employees to provide opinions and suggestions to prevent problems instead of concealing and concealing problems when they are discovered. If employees help the factory reduce waste and rework labor losses, give them material rewards to praise And encourage them (her). Do not use intimidation, hierarchical management, or fines, abuse, insults and other typical Chinese management methods. In this way, there is no willingness to speak, and the willingness to express opinions, errors will continue, and problems will continue to occur. This open and non-open level management style can only be started from the top, and other levels of management must also learn this style.

Manufacturers can pack products well by using paper bag machines, so paper bag machines are very important for manufacturers. When using the paper bag machine, in order to be able to more clearly understand its importance, we can first understand its development process, which will help us to better play the role of the paper bag machine.
The papermaking technology invented by China has historically provided conditions for the production of paper packaging. In 1850, the world price of paper plummeted, and paper packaging began to be used for food. In 1852, Wally in the United States invented the paper bag machine, and thus paper products machinery appeared. In 1861, Germany established the world's first packaging machinery factory, and in 1911 produced a fully automatic forming, filling and sealing machine.
The United States began to produce liquid filling machines in 1890, and gravity filling machines were produced in 1902. At the beginning of the 20th century, Durand in England used metal containers to store food, and various canned foods appeared.
Since the 1960s, new materials have gradually replaced traditional packaging materials, especially after the use of plastic packaging materials, packaging machinery has undergone major changes. The rise of supermarkets has put forward newer requirements for the packaging of goods. In order to ensure the fast and safe transportation of goods, containers were born, and the size of the container body has gradually realized standardization and serialization, which promotes the further improvement and development of packaging machinery.
The role of packaging machinery
Packaging is a necessary condition for products to enter the circulation field, and the main means to achieve packaging is to use packaging machinery. With the development of the times and technological progress, packaging machinery is playing an increasingly important role in the packaging field.
Its main functions are as follows:
(1) It can greatly improve labor productivity. The mechanical packaging of the sliding table blister sealer is much faster than manual packaging. For example, for candy packaging, manual sugar can only be wrapped in a dozen pieces per minute, while candy packaging machines can reach hundreds or even hundreds of pieces per minute. Thousands of dollars, increasing efficiency dozens of times.
(2) It can effectively guarantee the quality of packaging. Mechanical packaging can obtain packaging with the same specifications according to the requirements of the packaged goods, according to the required shape and size, but manual packaging cannot be guaranteed. This is particularly important for export commodities. Only mechanical packaging can achieve the standardization and standardization of packaging and meet the requirements of collective packaging.
(3) Able to realize operations that cannot be achieved by manual packaging. Some packaging operations, such as vacuum packaging, inflatable packaging, skin packaging, and isobaric filling, cannot be achieved by manual packaging and can only be achieved by mechanical packaging.
(4) It can reduce labor intensity and improve labor conditions. The labor intensity of manual packaging is very large. For example, manual packaging of large and heavy products consumes energy and is not safe; for light and small products, due to the high frequency, Monotonous actions can easily cause workers to get occupational diseases.
(5) Labor protection that is beneficial to workers. For certain products that seriously affect health, such as severely dusty, toxic products, irritating, and radioactive products, manual packaging will inevitably endanger health, while mechanical packaging can be avoided, and Can effectively protect the environment from pollution.
(6) It can reduce packaging costs and save storage and transportation costs. For loose products, such as cotton, tobacco, silk, hemp, etc., compressing and packaging using a compression packaging machine can greatly reduce the volume and reduce packaging costs. At the same time, because the volume is greatly reduced, the storage capacity is saved, and the storage cost is reduced, which is beneficial to transportation.
(7) It can reliably ensure that the product is hygienic. Some products, such as the packaging of food and medicine, are not allowed to be manually packaged according to the Sanitation Law because they will contaminate the product. Mechanical packaging avoids direct contact with food and medicine by human hands. Hygiene quality.
(8) Packaging machinery is a comprehensive science that can promote the development of related industries. It involves many disciplines such as materials, technology, equipment, electronics, electrical appliances, and automatic control. It requires all related disciplines to develop in a synchronized and coordinated manner. The problems will affect the overall performance of packaging machinery.
Therefore, the development of packaging machinery will effectively promote the progress of related disciplines. In addition, in order to meet the needs of high-speed packaging by packaging machinery, the related front and back processes are bound to adapt to it, which promotes the simultaneous development of related processes.

Paper bag is a kind of necessity in our daily life. It can pack food or other items well. The paper bag machine is a device that can produce many types of paper bags. It is very convenient to operate, and it has high safety and environmental protection, so it is very important.
1. According to the different uses of the paper bag, the material of the packaging bag should have resistance to moisture, water vapor, gas, light and heat, etc., and also need to have a certain impact strength, vibration strength and packaging humidity, etc., and must be The packaged items have a certain ability to protect. In this way, people's requirements for packaging bags can be met.
2. When selecting materials, the toxicity of packaging materials should be small, especially food packaging bags, which must not release poisons, otherwise it will affect the promotion and application of paper bags, and have certain anti-microbial properties. The material for the packaging bag made by the paper bag machine is made of paper, which can meet this condition.
3. The packaging materials can be produced on a large scale, which can meet people's daily needs, reduce the price of the materials, facilitate mechanization and automation, can adapt to printing, and can also print logos and trademarks on packaging bags.
4. The resources are relatively abundant, and the materials are easy to obtain, and the cost is relatively low. The used packaging bags can be recycled and will not cause environmental pollution. This is one of the fundamental reasons for eliminating plastic bags.
In general, the production materials of paper bags need to meet the requirements of people's daily life, and have high safety and environmental protection.

A good packaging can make our products more valuable and obtain high economic benefits. Therefore, the paper bag machine has the function and effect of promoting consumption. In order to improve the production efficiency and quality of the paper bag machine, we must use innovative technology to improve it, so that not only can the paper bag machine gain new vitality, but also promote the development of my country's packaging industry.
Due to the limited purchasing power of some small and medium-sized enterprises, most of them use medium and low-end packaging equipment. Many packaging companies buy second-hand imported packaging equipment, and many small-scale companies use old-fashioned packaging equipment. Compared with these small and medium-sized enterprises, the equipment of some large packaging companies is more advanced, with complete functions, high degree of automation and stable performance. This weak and strong current situation shows the lack of overall strength of my country's packaging industry.
It is true that low labor efficiency is determined by many factors. On the one hand, it depends on the technological innovation and transformation of enterprises, and on the other hand, it depends on the overall improvement of the quality of employees. But judging from the reality of my country's paper bag machine equipment packaging industry, it needs to go through a relatively long process.
For this reason, facing the development of the industry in the future, the industry should pay attention to the issue of polarization, and promote the healthy and orderly development of my country's paper bag machine equipment manufacturing technology in the spirit of scientific development. Now is an era where various technologies are advancing by leaps and bounds. Only continuous innovation can keep up with the pace of the times and meet the needs of the market.

1. Heat sealing temperature
The choice of the heat-sealing temperature of the composite film is closely related to the performance and thickness of the composite substrate, the model, speed, and heat-sealing pressure of the bag making machine, which directly affects the strength of the heat-sealing.
The initial sealing temperature of the composite film is determined by the viscous flow temperature Tf (or melting temperature Tm) of the heat sealing material, and the maximum temperature of the heat sealing cannot exceed the decomposition temperature Ta of the heat sealing material. The temperature range between Tf (Tm) and Ta is the heat sealing temperature range of the heat sealing material. It is a key factor affecting the quality control of heat sealing. The wider the heat sealing temperature range, the better the heat sealing performance, and the easier and more stable the quality control.
At the same time, the heat sealing temperature of the composite film cannot be higher than the heat setting temperature of the printing material. Otherwise, it will cause shrinkage and wrinkling of the heat-sealed part, reducing the heat-sealing strength and the impact resistance of the bag. Printing materials have good heat resistance, such as PET, ONY, etc., in production, the heat sealing temperature can be increased for rapid production; printing materials have poor temperature resistance, such as BOPP, try to use a lower heat sealing temperature, but by increasing Pressure, reduce vehicle speed or choose low temperature heat sealing material to ensure heat sealing strength.
The setting of the heat sealing temperature should be within the heat sealing temperature range of the heat sealing material, generally 15℃～30℃ above the viscous flow temperature Tf (or melting temperature Tm) (if within this range, the heat sealing layer cannot be truly sealed We must try to improve the pressure, speed, and mechanical properties. The greater the pressure, the better. If the pressure is too large, it will damage the welding edge and cause root breakage. "Supplementary discussion"). The heat sealing material is melted and extruded, reducing the thickness of the heat sealing, and increasing the thickness and unevenness of the welding edge. Although the apparent heat seal strength is relatively high, it will cause root breakage and greatly reduce the impact resistance of the seal (prone to break the bag, "replenishment") and sealing performance. (This analysis is very reasonable.) The heat-sealing temperature is lower than the softening point of the heat-sealing material, and increasing the pressure and extending the heat-sealing time cannot make the heat-sealing layer truly sealed.
The heat sealing temperature setting of continuous automatic filling equipment is often higher, because it is easily affected by the contamination, extrusion, and cooling speed of the contents during heat sealing.
2. Heat sealing pressure
At the heat-sealing temperature, the heat-sealing material begins to melt, and pressure is applied to the bonding surface to make the corresponding heat-sealing materials contact, permeate and diffuse with each other, and also promote the escape of gas on the surface of the film to make the molecules on the surface of the heat-sealing material The distance between them is reduced, resulting in greater intermolecular force, thereby increasing the strength of the heat seal. (Add heat sealing theory)
The heat sealing pressure is provided by the spring on the bag making machine. For thin and light packaging bags, the heat sealing pressure should be at least 1.96N/cm. The size of the heat sealing pressure is related to the structural properties, thickness, and heat sealing width of the composite film.
The heat-sealing material has a higher activation energy, and the increase in temperature has a greater influence on the decrease of its viscosity. The required heat-sealing pressure is small to prevent the molten material at the heat-sealing part from being extruded and reducing the heat-sealing effect. PE and PP are non-polar heat-sealing materials with very low activation energy and high pressure required, which is beneficial to heat-sealing strength and interface heat-sealability. (How to understand this paragraph, it should be the heat sealing material with higher activation energy and the heat sealing material with lower activation energy in the heat sealing material. PE and PP are commonly used heat sealing materials, and the general type of PE should be referred to here. , PP materials are heat-sealing materials with low activation energy, and heat-sealing materials such as mPE, EVA, EAA, EMAA, Surlyn, etc., are copolymerized, blended and modified, or special catalytic, ionic resins, etc. A heat-sealing material with a higher activation energy. I wonder if this is the right way to understand it?)
The heat-sealing pressure increases as the thickness of the composite film increases. If the heat-sealing pressure is insufficient, the heat-sealed C-layer film will be difficult to heat, and it will be difficult to exhaust the bubbles sandwiched between the welds; if the heat-sealing pressure is too high, the molten material will be squeezed away. Damage the welding edge and cause broken roots. When calculating the heat sealing pressure, the width of the required heat sealing rod (refers to the heat sealing width rather than the entire width of the rod) and the actual surface area (refers to the heat sealing contact area) should be considered. The wider the width of the heat sealing rod, the greater the pressure required. If the width of the heat-sealing rod is too wide, it is easy to entrain bubbles in the heat-sealed part, and it is difficult to heat-seal firmly. Generally, a hollow heat sealing rod is used to strengthen the heat sealing fastness in the last letter. For heat-sealing rods of the same width (heat-sealing width), if the surface is engraved, the actual contact area is greatly reduced, and the pressure per unit area increases accordingly. This is beneficial for heat-sealing bags with larger widths.
3. Heat sealing speed
The heat sealing speed reflects the production efficiency of the bag making machine, and is also an important factor affecting the heat sealing strength and appearance. The faster the heat-sealing speed, the higher the heat-sealing temperature should be to ensure that the heat-sealing strength and heat-sealing state reach the best value; under the same heat-sealing temperature and pressure, the slower the heat-sealing speed will lead to the fusion of the heat-sealing material It will be fuller and stronger, but it will not cause root breaking.
On domestic bag making machines, the length of heat sealing time is mainly determined by the speed of the bag making machine. To increase the heat-sealing time, the bag-making speed must be reduced and the efficiency of manual production must be reduced. If an independent frequency conversion motor is used to control the lifting and feeding of the heat sealing rod, and the heat sealing time is independently adjusted without changing the bag making speed, it will greatly facilitate the operation and quality control of the bag making machine. (Several domestic manufacturers can produce this kind of bag making machine, using three frequency conversion motors and one independently controlling the heat sealing time. The currently purchased Smick 600 bag making machine belongs to this type, not the domestic one mentioned above The bag making machine controls the heat-sealing time and the output is determined by the speed.)
Fourth, the cooling situation
The cooling process is a process of shaping the welds that have just been melted and sealed with a lower temperature under a certain pressure to eliminate stress concentration, reduce the shrinkage of the welds, improve the appearance of the bag, and increase the strength of the heat seal. The cooling water of the bag making machine is generally tap water or circulating water at about 20°C. If the water temperature is too high, the pressure of the cooling rod is not enough, the cooling water circulation is not smooth, the circulation is not enough, etc. will lead to poor cooling, and the strength of the heat seal will be affected.
Five, heat sealing times
In continuous automatic filling equipment and some bag making machines, longitudinal heat sealing generally adopts the welding method of ring-shaped steel strip coated with PTFE, and the transverse heat sealing adopts the hot plate welding method. However, most of the longitudinal and transverse heat sealing of the bag making machine use hot plate welding, the number of longitudinal heat sealing depends on the ratio of the effective length of the heat sealing rod to the bag length, and the number of transverse heat sealing is determined by the number of heat sealing devices on the machine.
Good heat sealing generally requires more than two heat seals. Most of the transverse heat sealing devices are three groups. In order to meet the heat sealing requirements of the wide side, transverse heat sealing devices are often added, and the number of heat sealing is increased to reduce the heat sealing temperature and reduce the shrinkage phenomenon. For packaging bags of longer specifications, multiple feeding technology can be used to reduce the length of each feeding to one-half or one-third of the bag length, thereby increasing the number of heat sealing and improving the heat sealing effect, but it will reduce production Efficiency, so some bag making machines increase the length of the longitudinal sealing rod to increase the number of heat sealing and ensure the quality of heat sealing.
Six, heat sealing rod gap
The gap of the heat-sealing rod refers to the application distance of the predetermined heat-sealing pressure to the heat-sealing surface when the upper heat-sealing rod contacts the bottom plate. With the same film thickness and the same heat sealing speed, the gap between the heat sealing rods is small and the heat sealing time is relatively short, and the heat sealing strength of the product will be reduced. Generally, the gap of the heat-sealing rod is set at 1～1.5mm, which is related to the film thickness, transfer performance, and bag making speed. (If an independent variable frequency motor is used to control the lifting and feeding of the heat sealing rod, and the heat sealing time is independently adjusted, the bag making speed does not matter.)
Seven, tension control
The tension control device is used to keep the film flat, easy to fold, uniform intermittent feeding, and reduce shrinkage and warpage of the heat-sealed part of the bag. The tension of the bag making machine is generally 1～1.5㎏/㎝?. (The role of tension control and the difference between good and bad needs to be added after discussing with Fan Gongliu.)
to sum up
1. The heat-sealing quality of composite flexible packaging bags is mainly to evaluate appearance inspection, heat-sealing strength, compressive strength, impact strength, etc. In the professional standards, there are some deficiencies in terms of heat sealing strength and pressure time. (Where is the lack, it needs to be contacted or supplemented by checking information.)
2. Process factors such as heat-sealing temperature, heat-sealing pressure, heat-sealing speed, cooling system, heat-sealing times, heat-sealing rod gap, tension control, etc. are all important factors that affect heat-sealing strength and appearance.
3. The quality of heat sealing depends on the selection of heat sealing materials and the determination of the production process, but at the same time other factors that affect the strength of heat sealing should be paid attention to: the structure and material of the composite film, the composite strength between layers, printing and layout, layout design (Ink area), heat resistance of ink and adhesive, etc.
This procedure is applicable to the bag-making process. This procedure is divided into five major parts: preparation before starting up, adjustment, sampling and testing, starting up and running, and shutting down and cleaning.
1. Preparation before starting:
1.1 Collar composite film: According to the requirements of the production task list, determine the composite film to be processed, and pick up the composite film in the maturation room or the specified location.
1.2 Precautions for the composite membrane: check the maturation time and composite strength of the composite membrane, and check whether there is a "process transfer order" on the composite membrane according to the serial number of the "process transfer order"