German-Imported Valve Bag Production Machinery: Technical Advantages, Brand Selection, and Industry Application Guide

In today's modern industrial packaging field, valve bags have become one of the mainstream choices for packaging powdery and granular materials, widely used in industries such as cement, chemicals, food, and pharmaceuticals. Among the global suppliers of valve bag production equipment, German manufacturing has always been at the world's leading position due to its outstanding technical craftsmanship, reliable and stable performance, and innovative design concepts. This article will comprehensively introduce the technical characteristics, brand advantages, and application fields of German-imported valve bag production machinery, providing professional references for relevant enterprises in equipment procurement.

I. Basic Composition and Technical Characteristics of Valve Bag Production Equipment

The fully automatic valve bag production line is a complex systematic project, usually consisting of multiple components such as a feeding device, a folding device, an inner lining laminating device, and a valve forming equipment. German-imported equipment demonstrates particularly exquisite technical handling in these aspects.

The feeding device adopts a non-intermittent transmission design, including a machine shell, a feeding mechanism, and a cutting mechanism. The feeding mechanism is composed of a fixed transmission roller assembly and a movable transmission roller assembly that swings up and down. A transition mechanism and a monitoring mechanism for monitoring the operation of bag materials are also installed between the feeding mechanism and the cutting mechanism. This design ensures the continuous supply and precise cutting of materials, greatly improving production efficiency.

The folding device includes a placement table for receiving the cut individual bags and a feeding table for conveying the bags. On both sides of the feeding table, starting from the feeding end, there are sequentially arranged a first moving mechanism for moving the bags onto the feeding table, a first folding mechanism for performing the first-step folding on both ends of the bags, a cutting mechanism for cutting openings on the top sides of the bags, a second folding mechanism for performing the second-step folding on both ends of the cut bags, and a sealing mechanism for heat-sealing both ends of the bags. The entire process features a high degree of automation, requiring almost no manual intervention.

The valve forming equipment is a key link in the production line, and its structure includes a support table, a driving machine, a testing machine, a conveyor belt, a controller, a processing machine, and a cooling mechanism. German equipment adopts a unique cooling mechanism design in this aspect: a linked rotating wheel is installed under the conveyor belt to link with the rotating shaft of the conveyor belt, driving the rotating shaft to rotate. This causes the convex plate to squeeze the pressure rod on the air-blowing mechanism, making the pressure rod move reciprocally left and right, thereby pushing the gas to be discharged through the flow-dividing rod on the connecting shell to cool the valve bags. This innovative design effectively solves the problem that the valve needs to wait for cooling due to incomplete shaping caused by residual temperature when it is just formed and conveyed out, significantly improving production efficiency.

II. Major Brands and Technical Advantages of German Valve Bag Production Machinery

Germany is home to a number of world-renowned enterprises in the field of valve bag production equipment manufacturing, and each enterprise has its unique technical advantages and product characteristics.

1. Windmöller & Hölscher (W&H)

W&H is an outstanding enterprise in the flexible packaging machinery manufacturing industry. Its equipment not only features stable performance but also continuously commits to providing customers with various solutions for increasing output and reducing energy consumption in film manufacturing, printing, and bag making. The company's CONVERTEX automatic square-bottom valve bag making production line is specially designed for the production of AD proTex® valve bags, capable of producing valve bags of excellent quality with unparalleled speed and efficiency.

The CONVERTEX series equipment includes multiple models such as SL 100, SLC, and CL 140. The bag width range varies from 35-60 cm (for SL 100 and SLC) to 44-51 cm (for CL 140), and the bag length range ranges from 45-91 cm (for SL 100 and SLC) to 44-65 cm (for CL 140). The maximum production speed can reach 140 bags per minute (for the CL 140 model), depending on factors such as the bag design and processing materials.

2. Heidelberg

As a global leader in printing machinery manufacturers, Heidelberg produces valve bag packaging machines with outstanding performance and reliability. Its products are widely used in fields such as food, pharmaceuticals, and chemicals.

3. Other German Brands

German companies such as Focke & Co and Siegwerk are also important players in the field of valve bag production equipment. They have excellent performance in terms of equipment performance and quality, and their products are widely used in multiple industries.

The common technical advantages of these German brand equipment include:

• High degree of automation: Adopting advanced PLC control technology and LCD touch screen interface, enabling simple and intuitive operation.
• Exquisite manufacturing craftsmanship: Using high-quality stainless steel materials and precision parts to ensure long-term stable operation of the equipment.
• Excellent energy-saving effect: Optimized power design and energy management system, effectively reducing production costs.
• Flexible adaptability: Capable of processing multiple materials (such as PP, BOPP, PE, paper, etc.) and producing valve bag products of different specifications.
• Intelligent monitoring system: Equipped with an advanced monitoring mechanism, including a first monitoring component installed at one end of the transition table and a second monitoring component installed between the adjustment component and the tensioning component, ensuring stable and reliable production processes.

III. Application Fields and Successful Cases of German Valve Bag Production Machinery

Relying on its outstanding performance, German-imported valve bag production machinery has been widely used worldwide, including but not limited to the following fields:

• Construction materials industry: Used for packaging products such as cement and gypsum powder;
• Chemical industry: Used for packaging various powdery and granular chemical raw materials;
• Food industry: Used for packaging flour, sugar, food additives, etc.;
• Pharmaceutical industry: Used for packaging pharmaceutical raw materials and intermediates;
• Feed industry: Used for packaging various animal feeds.

The successful case of Wenzhou Detai Plastic Industry Co., Ltd. in China fully demonstrates the outstanding performance of German equipment. In 2007, the company introduced the AD PLASTIC SL fully automatic plastic valve bag making machine from W&H (Germany), which became the first fully automatic production line in Zhejiang Province. Then, in 2012, it invested over 100 million yuan to introduce multiple advanced equipment such as the AD2360 multi-purpose full-paper bag making machine and the AM2160 multi-purpose paper bag tube making machine from W&H (Germany). In 2018, it further introduced heat-sealed valve bag production lines from W&H (Germany) and Starlinger (Austria).

With the help of these advanced German equipment, Detai Plastic Industry has won the titles of "Provincial Science and Technology Enterprise" and "National High-Tech Enterprise". Its products are sold to more than 100 countries around the world, and its customers include Fortune 500 companies and industry-leading enterprises such as Dow Chemical, Saint-Gobain, and Sinopec.

IV. Technical Considerations for Purchasing German Valve Bag Production Machinery

When selecting German-imported valve bag production machinery, the following key technical parameters need to be considered:

• Production speed: The production speed of different models of equipment varies greatly. For example, the production speed of the CONVERTEX series ranges from 100 bags per minute to 140 bags per minute, while the output of the VALVOMAT automatic valve bag placing machine is as high as 1,000 bags per hour.
• Packaging specifications: Appropriate packaging specifications need to be selected according to product requirements. For instance, the packaging specification of the AT-DGS-50FK valve bag packaging machine is 10-50 kg, and the weighing capacity can reach 100 kg.
• Weighing accuracy: A high-precision weighing system ensures packaging accuracy. For example, the dual-sensor weighing method can achieve an accuracy of ±0.2%.
• Power configuration: Equipment power and energy requirements. For example, a general valve bag packaging machine is equipped with a power of 2.2 kW, a frequency/voltage of 50 Hz/380 V, and a power supply method of three-phase five-wire.
• Equipment size: Appropriate equipment size needs to be selected according to the workshop space. For example, the common overall dimensions are 1000 (length) × 1000 (width) × 2200 (height) mm.
• Material adaptability: It is necessary to consider whether the equipment can process multiple materials, such as PP, BOPP, multi-layer paper, PE, paper-plastic composite materials, etc.

V. After-Sales Service and Technical Support

When choosing German-imported valve bag production machinery, in addition to the performance of the equipment itself, it is also necessary to consider the after-sales service and technical support provided by the supplier. German manufacturers usually provide the following support:

• Installation and commissioning: Professional technicians conduct on-site installation and commissioning to ensure the normal operation of the equipment;
• Operation training: Comprehensive training for equipment operators and maintenance personnel;
• Technical consultation: Continuous provision of technical consultation and process improvement suggestions;
• Spare parts supply: Ensuring the timely supply of original spare parts to reduce downtime;
• Modification and upgrading: Providing equipment modification solutions to bring existing equipment up to the latest technical level.

It is worth noting that companies like W&H also provide modification solutions, which can upgrade existing equipment to the most advanced level through modernization modifications. This is a cost-effective way of equipment upgrading.

VI. Future Development Trends

With the increasingly strict environmental protection requirements and the continuous development of intelligent manufacturing technology, German-imported valve bag production machinery is also constantly innovating and upgrading. The future development trends mainly include:

• Energy conservation and environmental protection: Adopting more energy-saving technologies and environmentally friendly materials to reduce equipment energy consumption and environmental impact;
• Intelligence: Integrating more sensors and Internet of Things (IoT) technologies to realize real-time monitoring of equipment status and predictive maintenance;
• Flexible production: Improving the flexibility and adaptability of equipment to quickly switch between producing products of different specifications;
• Material innovation: Adapting to new environmentally friendly materials and production processes, such as degradable plastics and recycled materials;
• High speed and high efficiency: Continuously improving production speed and work efficiency to reduce the cost of individual products.

German-imported valve bag production machinery, with its outstanding technical performance, reliable stability, and innovative design concepts, has become the preferred equipment in the global valve bag production industry. Whether it is the high-speed CONVERTEX production line of W&H or the high-precision equipment of Heidelberg, they all represent the highest level of current valve bag production equipment.

When enterprises choose German-imported valve bag production machinery, they need to comprehensively consider factors such as production needs, technical parameters, after-sales service, and investment budget to select the equipment that best suits their own needs. At the same time, they should make full use of the technical support and services provided by German manufacturers to ensure that the equipment is always in the best operating state, thereby creating maximum economic benefits for the enterprise.

With the continuous advancement of technology and the increasing diversification of market demand, German-imported valve bag production machinery will continue to innovate and develop, providing more advanced, efficient, and environmentally friendly solutions for the global packaging industry. Chinese manufacturing enterprises should seize the opportunity, actively introduce, digest, and absorb advanced foreign technologies, continuously improve their own production levels and competitiveness, and occupy a more important position in the global packaging market.