The high-speed automatic valve bottom paper bag paper tube machine is a linkage production line. The tube making machine is used to produce medium-sized stepped bottom bag tubes and straight-cut bag tubes. It needs to be used in conjunction with the bottom gluer to complete the entire valve bag. production process.

The bottom paste paper bag has low cost and high strength. It is widely used in the packaging of powdery and granular materials such as cement, chemical raw materials and grains. The paper tube machine is composed of multiple production control systems. Next, the paper tube machine manufacturer will introduce to you in detail what are its production control systems?

Features and functions of production control system of paper tube machine

1. Automatically correct the deviation of the paper

The paper feeding automatic deviation correction system is to make the paper edge of each layer of bag automatically run at the set position, to ensure the accuracy of the trapezoidal incision of the bag tube and the position of the glue, and it is an important automatic control function to ensure the quality of the bag tube and the glued bottom bag.

2. Automatic brake on paper break

When paper breaks occur at the paper holder, virtual cutting and the entrance of the main machine, emergency automatic braking is realized, which effectively avoids the phenomenon of traffic jam caused by untimely detection of paper breaks, shortens the processing time of paper breaks and reduces paper waste.

3. Bag cylinder output control

It realizes the automatic counting and grouping output of the bag tubes, and has the function of arranging the bag tubes, which lays a foundation for the bottom gluing machine to realize the fast bag tube feeding.

4. Printing coordination control

Coordinated with the start and stop of the main engine, the automatic ups and downs of the printing roller and the automatic switching of the ink distribution mode are realized to ensure the accurate and clear printing.

5. Frequency conversion speed regulation

The frequency conversion speed regulation makes the adjustment of the running speed of the equipment stable, fast, low noise and energy saving. The unique multi-point speed regulation control scheme allows the operator to operate the paper rack, printing machine and main engine in addition to the console. Carry out operations such as deceleration, parking and signaling to improve the operating efficiency of the equipment.

6. Automatic control of glue supply

After the paper bag is automatically glued by the layered virtual cutting and gluing system, the paper bag is formed into a bag tube shape.

7. Auxiliary control for paper roll replacement

Auxiliary control for paper roll replacement is provided, which can realize auxiliary replacement, add and supplement new paper rolls.

8. Automatic production statistics

The automatic output statistics can count the number of paper bags produced, which is convenient to understand the workload of the machine.

What are the production control systems of the paper tube machine? After reading the above content, you should have an understanding. The design of the production control system is concise and reasonable, and the operation is convenient and reliable. Personnel and power consumption ensure the high quality and low cost of the bottom bag product.

The valve bag made by the bottom paste machine has the characteristics of good moisture resistance, reasonable cost and high production efficiency. It is suitable for the packaging of various powdery colloidal products. effect.

Application scope of valve bag

1. Industrial aspects

It is a powder product packaging for building materials powder, chemical raw materials, pharmaceutical additives, cement, quartz sand, cellulose, polyvinyl alcohol, dispersible latex powder and other materials. Due to the particularity of the product, the packaging bag must meet the requirements of moisture-proof, moisture-proof, dust-proof, easy to stack, not easy to slip, not easy to damage, impact resistance and so on!

2. Agricultural products

The valve bag is an ideal packaging container for powder, granular, flake, flocculent and thick materials such as fertilizers and pesticides used in agricultural production. It is widely used in industrial and agricultural packaging. The valve bag can realize high-speed filling, flexible valve port, neat stacking, strong firmness, no dust leakage, packaging, moisture-proof and moisture-proof. It is a packaging that is particularly popular and widely used by businesses. The use of the packaging bag saves production time and reduces labor costs for enterprises.

3. Food industry

The food industry requires environmentally friendly packaging materials. The valve pocket can just meet the packaging requirements of different products, meet the requirements of environmental protection and import and export packaging requirements, and can also be produced according to food hygiene requirements. Standing packaging, suitable for automatic filling of packaging machinery.

The role of valve bags

1. Shell protection

Items stored in packaging bags need to avoid extrusion, impact, vibration, temperature difference, etc. Anti-leakage is also a necessary factor in packaging design. Paste bottom bag packaging can separate items from oxygen, water vapor, and stains.

2. Physical protection

Some packages include desiccants or deoxidizers to extend the shelf life. Keeping food clean, fresh and safe during the shelf life is the primary function of the packaging bag. Vacuum packaging or removing the air from the packaging bag is also the main food packaging method.

3. The same package

Packing small items of the same kind into one package is a great way to save space. Powders and granular objects need to be encapsulated.

The above is the introduction of the application scope and function of the valve bottom paste machine. Since its establishment, our company has been focusing on automatic paper bag making machine, valve bottom paste machine, valve pocket bag making machine, valve bottom paper bag R&D, manufacturing and sales of complete sets of equipment and valve-to-bottom bags.

The valve bag square bottom machine is the main production equipment for the production of valve bags. Its purpose is to replace the manual mass production of a valve bag production equipment. With the wider use of valve bags and the increasing demand, people urgently need to use automated production equipment to replace manual production methods. Then the manufacturer of the square bottom machine will introduce you to the purchase method of the valve bag square bottom machine. .

1. Select as needed

When purchasing a valve bag square bottom machine, we need to choose according to the type and style of the actual product produced. Now there are square bottom machines on the market that produce plastic products, non-woven bags, and kraft paper bags. They are in The knives and sealing processes used in the production process are also different, so we need to choose a square bottom machine according to the material we actually produce the valve bag.

2. Select according to equipment parameters

We need to choose according to our production needs. Among the similar square bottom machines, we select the parameters to be compared, including production speed, accuracy, capacity size, accessories, materials, after-sales service, etc. In terms of expansion, it is the same price. The faster the production speed and the greater the production capacity, the greater the economic benefits. In addition to the speed, the accuracy and reject rate in the production process of the equipment, the quality of the equipment and the services that can be provided all affect the experience of our equipment, and they are all things we need to consider.

3. On-site visit

The direct way to understand the production strength of a product is to visit the manufacturer on the spot, observe the scale of the manufacturer, the level of production technology, the production site of the employees, etc. Of course, it also includes on-the-spot observation of the operation and production capacity of the equipment, which is also the process of purchasing large-scale equipment. an important aspect. Seeing is believing is more intuitive than what we know from salespeople or brochures.

4. Understand the equipment

It mainly depends on the functional configuration and materials of the machine. When you go to the factory to see the machinery, you must first look at the functional configuration of the square bottom machine, whether it suits your needs, and understand the working principle of the square bottom machine; secondly, you should look at the electrical components of the square bottom machine and various working mechanical parts. If the square bottom machine is equipped with good electrical components, then the machine can generally be used for several years or even longer; another is to look at the frame structure of the square bottom machine, whether it is made of thick and durable good steel , whether the paint is good (anti-rust).

5. Understand after-sales service

Good manufacturers, their after-sales service must be in place. The perfect after-sales service has a formal purchase contract to protect the interests of customers, including quality assurance, on-site technical training and guidance for customers, on-site installation and commissioning for customers, technical support after customers are officially put into production, and propose solutions. and many more. A good after-sales service can solve many problems encountered in actual production for customer service, and protect the rights and interests of consumers to the greatest extent.

The above is the introduction of the purchase method of the valve bag square bottom machine, which also includes some matters that we need to pay attention to in the purchase process. Our company, as the production and research organization of bottom paste machine and square bottom machine, has rich experience in equipment purchase, use and maintenance. If you need it, please feel free to inquire.

At this stage, valve bags are still very few in the field of wheat flour applications. The key factor is that valve bags are more expensive than packaging bags, but valve bags have waterproof, anti-corrosion, unilateral air permeability, good airtightness, environmental protection and biodegradation. , suitable for high stacking, long-distance shipping container transportation and other advantages, some baking powder, chicken powder, high-grade wheat flour use valve bag packaging.

Types of valve bags

Paper composite valve bag: It is made of woven bag (commonly known as acupuncture non-woven fabric) as a board, and is made of a composite type by casting method (cloth/film/paper composite type is three-in-one).

Packaging paper valve bag: It is made of kraft paper, (the packaging paper is mainly divided into imported kraft paper and domestic packaging paper). The number of superimposed layers of packaging paper varies from one layer to six layers according to the main purpose, and the middle can be coated or Add PE plastic film.

PE valve bag: alias heavy bag valve bag, made of poly-Zene plastic, the wall thickness of the film is generally in the middle of 8-20 silk.

Low melting point valve bag: made of low melting point poly-Zene plastic, the wall thickness of the film is generally in the middle of 8-20 silk, suitable for large-scale production and application in chemical factories on production lines, which can reduce environmental pollution and reduce employee labor efficiency.

Composite valve bag: It has the printability of printing paper and the waterproof and firmness of plastic. It is a new material.

The working principle of valve bag packaging machine

1. The valve bag packaging machine uses the motor as the power source to drive the impeller in the discharge seat to rotate smoothly to achieve uniform feeding;

2. The sensor measures the weight of the material in the bag and inputs the measurement signal into the microcomputer. When the filling weight requirement is met, the microcomputer outputs the signal, and the sealing cylinder extends into the working state to seal the discharge port;

3. At the same time, the pull rod of the electromagnet moves up, and the material bag falls, so as to realize quantitative and rapid packaging of loose materials;

4. The material enters the dividing wheel from the outer silo, and enters the ash hopper from the feed port on the machine base. The material is evenly sent to the discharge port through the smooth rotation of the impeller, insert the packaging bag, and lightly touch the travel switch on the right side of the feed nozzle. , the sealing cylinder shrinks;

5. The discharge nozzle is unobstructed, the filling starts, and the material falls into the bag smoothly;

6. With the increase of materials in the bag, the signal input by the sensor to the microcomputer is also constantly changing. When the weight of the material reaches the set requirement, the microcomputer outputs a signal, the sealing cylinder is extended, and the discharge port is sealed. Move, the material bag falls, so as to achieve the automatic packaging requirements of automatic measurement and automatic bag drop.

The above is all about the application of valve bag packaging machine in the flour industry. If you have any questions during use, please feel free to contact us for discussion.

The most important function of packaging is to protect the quality of all packaged goods, that is, to ensure that the goods will not be damaged, lost, leaked and spoiled.

This requires that the seal must have a certain strength and sealing performance in the process of bag making, and can withstand the pressure of a certain weight of content to ensure that the product does not crack or leak during the circulation process, so as to achieve the purpose of protecting the product. And bag making is the last production process before delivery to users, and quality control is more important.

Material selection

Surface material

Most of the non-heat-sealable materials are used, and materials with good heat resistance and small thermal deformation should be considered, such as BOPA, BOPET, BOPP, paper, etc.

Inner material

That is, the heat-sealable material can be heat-sealed at a temperature 30°C lower than the heat-deformation temperature of the surface-layer material. If the temperature is low, the sealing fastness is poor and cannot meet the requirements. In order to improve the sealing fastness, the temperature is raised. Because the thermal deformation temperature difference between the inner and outer layers is too small, the surface material is easily scalded.

For the same heat-sealing material, its heat-sealing strength will increase as the thickness of the heat-sealing material increases. Therefore, the inner layer material of the back sealing bag and the stand-up bag should be more than 30μm thick. If the inner layer material is too thin, it will affect the sealing of the finished bag.

Zipper

A zipper seal with a lower heat-sealing temperature should be used, generally 5~10°C lower than the heat-sealing temperature of the inner layer material, such as the PE L-101 zipper seal of Zhongshan Zhongcheng Packaging Materials Co., Ltd. Its PE LL-201 is about 10 ℃ lower, which can be selected when making bags with different PE inner layer materials, so as to achieve the best state of heat sealing with the inner layer material.

Preparation before bag making

1. Ensure that the composite layer of the composite film is completely cured, otherwise it will easily cause the deformation of the heat-sealed edge after bag making, which will affect the appearance of the bag;

2. Select an appropriate heat seal according to the requirements, and clean it up to ensure that the heat seal knife surface is flat, and check whether the heat insulation cloth is intact and flat;

3. Check the status of each part of the bag making machine, pre-set the pressure-sealing temperature according to experience (refer to the previous production conditions of similar materials), preheat, and start the formal production after reaching the preset temperature for 20 minutes. It should be noted that reaching the preset temperature does not mean that the heat seal has reached the preset temperature, and there needs to be a process of heat conduction to achieve equilibrium;

4. Adjustment of bag making process conditions Temperature, pressure and time (speed) are the three indispensable elements of heat sealing and the most important conditions for process parameters. Temperature, pressure and time (speed) need to be adjusted according to each other to achieve the best state.

Heat sealing temperature

The heat sealing temperature has the most direct influence on the heat sealing strength, and it is the main basis for selecting the optimal viscous flow temperature state. The heat sealing temperature should be set according to the material, thickness and processing speed of the composite material. In the actual production process, due to the influence of various factors such as heat sealing pressure, bag making speed and the thickness of the composite substrate, the heat sealing temperature is often higher than the melting temperature of the heat sealing material.

If the heat sealing temperature is lower than the melting temperature of the heat sealing material, even if the pressure is increased and the heat sealing time is prolonged, the heat sealing layer cannot be truly sealed; if the heat sealing temperature is too high, it is easy to damage the heat sealing material at the seal. Greatly reduces the sealing strength.

Sealing pressure

Under normal circumstances, pressure is the first parameter to be adjusted and determined. Generally, there is no pressure indication in the equipment. It is suitable for the pressure end of the heat sealing knife to be about 3mm. The pressure balance (left and right or front and rear) is very important. It is difficult for the heat cover to be truly fused together, resulting in poor local heat sealing, and sometimes the phenomenon that the air bubbles caught in the welding seam cannot be removed cleanly.

If the compression is too large, the pressure will be too high, which will cause the heat sealing and the traction to be out of sync, and when the heat sealing temperature is high, the material at the sealing will be in a semi-molten state. If the pressure is too high, it is easy to squeeze out part of the heat sealing material. , so that the edge of the seal is in a half-cut state, causing the material at the seal to become thinner and brittle, and the heat sealing strength is reduced.

Sealing time (speed)

The sealing time not only affects the heat sealing strength but also the appearance flatness of the composite packaging bag. When the heat-sealing temperature and heat-sealing pressure are fixed, the longer the heat-sealing time is, the more fully the heat-sealing layer is fused, the stronger the bond, and the higher the sealing strength. Wrinkling affects the appearance smoothness.

Cool down

The cooling process is to use a lower temperature to shape the weld just after melting and heat sealing. The cooling temperature should be the lowest temperature at which the cooling knife does not accumulate condensed water. The cooling water should be circulated smoothly. If there is no condition to use the cooling water, the water flow should be increased as much as possible to ensure the cooling effect. If the cooling of the sealing edge after heat sealing is not enough, resulting in insufficient shaping, the internal stress cannot be eliminated, and the heat sealing strength and appearance will be affected.

Heat sealing times

The more times of heat sealing, the higher the strength of heat sealing. Generally, the number of times of heat sealing is required to be at least two times. The number of longitudinal heat sealing depends on the ratio of the effective length of the longitudinal heat sealing knife to the bag length; the number of transverse heat sealing is determined by the number of sets of transverse heat sealing devices in the bag making machine.

Process control

In the production process, the quality of the finished product should be continuously checked. In addition to the size and appearance visual inspection, the sealing strength and sealing performance should also be checked. Find problems and adjust them in a timely manner, and make detailed records. Taking the production of three-side sealing zipper bags as an example, the following items should be checked:

1. Heat sealing strength;

2. The size, flatness, appearance quality of the bag, front and rear alignment of the bag and other requirements of the customer, such as the position of the tearing opening, etc.;

3. The internal and external opening force of the zipper, the internal opening force of the PE zipper is generally required to be ≥50N/50mm, and the internal opening force of the PP zipper is generally required to be ≥60N/50mm. The PE LL-201 of Zhongshan Zhongcheng Packaging Materials Co., Ltd. can reach ≥ 70 N/50mm, PE Q501 can reach ≥80 N/50mm, the external opening force has different requirements according to the customer’s usage habits;

4. The sealing performance of the bag can be tested by spraying a dye-added penetrant into the seal to see whether it penetrates or not, or by filling the bag with water and hanging it upside down for 24 hours to see whether it seeps.

5. The flatness of the bag zipper. Heat sealing bag making is a heat transfer process, and its process is relatively uncomplicated, but there are many factors that affect its quality.

In addition to some of the above points, the peel strength of the composite film, the heat resistance of the printing ink, the precipitation of additives in the heat-sealing layer, the width of the heat-sealed edge, and the thickness uniformity of the composite film are all related to the final quality of the composite film bag. Comprehensive consideration should be taken in the production process.