Fully automatic paper bag making machine: an efficient solution for environmentally friendly packaging production

With growing global environmental awareness and the implementation of plastic bans across the globe, demand for paper bags as an environmentally friendly packaging material is rapidly growing. Paper packaging, due to its recyclable and biodegradable properties, has become a valuable alternative to plastic bags. As the core equipment for paper bag production, paper bag making machines have therefore garnered widespread attention. This article will comprehensively introduce modern paper bag making machines, including their technical principles, equipment classifications, features, advantages, and application areas.

The working principle of paper bag making machine

Paper bag making machine is a kind of automated equipment specially used to process roll paper into various paper bags. Its working principle is to process the original color or printed roll paper into finished paper bags through a series of precisely coordinated processes.

The entire process includes edge gluing, folding into tubes, tube cutting, bottom creasing, bottom gluing, bottom forming, and finished bag delivery.1 These steps are completed continuously on a single machine, significantly improving production efficiency. The machine utilizes an advanced PLC servo control system and a touchscreen human-machine interface, allowing operators to monitor the production process in real time and adjust parameters as needed.

Main types of paper bag making machines

According to different production processes and final products, paper bag making machines can be divided into many types:

1. Sheet-fed paper bag making machine

This equipment automatically produces paper bags using 70-200g/㎡ single-sheet paper, laminated film or roll paper as raw materials. It has the advantages of stable production, low noise, high yield, fast production speed and easy operation.

2. Paper bag forming machine

It uses 128-300g/㎡ hard paper as raw material, and uses hot melt adhesive, various OPP, varnish, lint, glossy glue and other auxiliary materials to realize automatic paper feeding, gluing, tube pasting, accordion folding and other processes. It has the advantages of fast drying time, strong viscosity, and no glue overflow or leakage.

3. Roll-type square bottom paper bag machine

It uses 70-170g/㎡ roll paper as raw material and is made through processes such as roll making, gluing, forming, creasing, bottom pasting, and output. It is mainly used to produce food bags, handbags, small grain packaging bags, and dust bags.

4. Food paper bag machine

This equipment is specially used for producing paper bags for food packaging. It also uses roll paper as raw material and is made in one process of folding, forming, bag cutting, gluing, bottom folding, bottom gluing and finished bag output. It is an ideal equipment for producing environmentally friendly paper bags such as shopping bags, clothing bags, snack food bags, bread bags, vomit bags, dried fruit bags, etc.

Technical characteristics of modern paper bag making machines

Contemporary advanced paper bag making machines incorporate a variety of technological innovations, which are mainly reflected in the following aspects:

1. Intelligent control system : The use of PLC servo control system and touch screen human-machine interface makes the operation more intuitive and simple. The operator can set the length of the bag arbitrarily within a certain range, which greatly improves the flexibility and adaptability of the equipment.
2. Constant Tension Control : A truly fool-proof, fully automatic constant tension control system uses a high-precision controller to ensure that tension remains stable from start to finish. This ensures consistency in the production process and improves product quality.
3. Automatic deviation correction system : Dual photoelectric sensors limit automatic deviation correction control system, stable correction, energy saving, long service life. The integrated unloading automatic deviation correction system uses dual photoelectric switches to limit correction, and the correction motor does not need to work frequently, which increases its service life.
4. Modern paper bag machines feature a variety of non-stop adjustments, including simultaneous adjustment of the thumb and bottom cut positions, indentation position, hub side clamp and nozzle, and bottom flip adjustment. These features significantly reduce downtime and improve production efficiency.
5. Precise color mark tracking system : ensures the accuracy of the cutting position of each printed pattern on the paper bag. The automatic color mark registration function eliminates the need to readjust the cutting position after changing paper rolls, paper breaks, or power outages, greatly reducing the scrap rate.
6. Environmentally friendly gluing system : The lower gluing tank allows for direct use of purchased glue without the need for thickeners to increase viscosity. This effectively reduces wrinkling on the bottom of bags coated with high-viscosity glue. It also eliminates glue leakage during shutdown or low-speed operation of the upper gluing tank.

Technical parameters of paper bag making machine

Different types of paper bag making machines have their own specific technical parameter ranges. The following are some typical parameters:

Parameter Type	Parameter range
Bag cutting length	150-460 mm
Bag making speed	Up to 400 pieces/minute
Applicable paper weight	30-170 g/m²
Paper bag width	80-450 mm
Machine power	6-18.5 kW
Machine weight	3000-10500 kg

These parameters will vary depending on the equipment model and production requirements. When purchasing equipment, users should choose the appropriate model based on their product requirements.

Application areas of paper bag making machines

Paper bags produced by paper bag making machines are widely used in many industries:

• Food packaging : snack food bags, baking bags, nut frying bags, supplementary food bags, fruit bags, baby product bags, etc. These paper bags need to meet food hygiene standards and are usually made of materials such as greaseproof paper or laminated paper.
• Retail shopping : Shopping bags used in shopping malls and specialty stores must not only have a strong load-bearing capacity but also have an attractive appearance to promote the brand.
• Gift packaging : high-end packaging bags used for gifts such as candy, tea, and wine usually require exquisite design and good feel.
• Industrial packaging : cement paper bags, starch paper bags, tea paper bags and chemical raw material paper bags, etc. These paper bags generally require higher strength and specific protective properties.
• Special packaging : such as medicine bags, cosmetic bags, clothing bags and other special packaging, each has different special requirements.

Considerations for choosing a paper bag making machine

When choosing a suitable paper bag making machine, there are several factors to consider:

1. Production capacity requirements : Choose equipment with the appropriate speed and degree of automation based on projected production needs. Production capacity includes both the speed and output of the machine, and the appropriate model should be selected based on the company's needs.
2. Product material range : Different equipment has different adaptability to paper materials and weights. You need to choose the appropriate machine based on the characteristics of the paper you plan to use.
3. Equipment stability : Choose machines with high-quality components and strong stability to ensure production continuity and stable quality. Equipment reliability and durability are key factors affecting long-term production efficiency.
4. Ease of operation : Modern paper bag machines usually have intelligent control systems, but the operating interface and debugging difficulty of different equipment are still different, and the operator's technical level and training needs should be considered.
5. After-sales service : The equipment supplier's technical support capabilities and after-sales service quality are also important considerations. Especially for highly automated equipment, timely technical support is crucial.

The future development trend of paper bag making machines

With the improvement of environmental protection requirements and technological progress, paper bag making machines are also constantly developing and innovating:

1. Higher speed and efficiency : By improving mechanical design and control systems, the production speed of paper bag machines is still increasing, and higher production efficiency is expected to be achieved in the future.
2. Intelligent production : Paper bag making machines will be more deeply integrated with technologies such as the Internet of Things and artificial intelligence to achieve automation and intelligence in the production process, including functions such as automatic detection, automatic adjustment and preventive maintenance.
3. Flexible production capacity : In order to adapt to the market demand for small batches and multiple varieties, the paper bag machine will have faster mold change and adjustment capabilities to improve the flexibility and adaptability of the equipment.
4. Energy saving and environmental protection : Paper bag making machine manufacturers will pay more attention to energy conservation and emission reduction, adopt more environmentally friendly materials and processes, and reduce energy consumption and waste generation during equipment operation.
5. Integrated production : Future paper bag production lines may combine printing, die-cutting, bag making and other processes more closely, achieving one-step forming from raw materials to finished products, further reducing intermediate links and improving production efficiency.

As a key piece of equipment in environmentally friendly packaging production, paper bag making machines are becoming increasingly important as global environmental awareness grows and market demand expands. Modern paper bag making machines integrate multiple technologies, including mechanics, electronics, and control, to achieve efficient and precise paper bag production. Choosing the right paper bag making machine not only improves production efficiency and quality, but also provides a competitive advantage for businesses while contributing to environmental protection.

With the continuous advancement of technology, paper bag making machines will continue to develop in the direction of intelligence, efficiency, and flexibility, providing more complete solutions for the packaging industry. When purchasing equipment, companies should fully consider their own needs, market trends, and technological developments to make wise investment decisions.