In the soft packaging production industry, the non-stretchable bag making machine is the core equipment for producing high-precision color printing bag, aluminum foil bags and food bag. Compared with ordinary bag-making machine, the production pain points such as film stretching, bag body deformation, graph and text deviation and uneven edge sealing are solved completely. Many manufacturers only pay attention to price and production speed when purchasing, but do not understand the identification and process configuration of core performance, resulting in high scrap rates, substandard accuracy and poor post-production adaptability. To accurately select and avoid procurement pitfalls, scientific judgments must be made from three dimensions: core performance, critical processes, and adaptation scenarios.
The core of the selection focuses on the performance of non-tensile feedstock, which is the core value of the equipment and the key to distinguish between high and low quality models. Ordinary bag making machine can only rely on a single set of rubber rollers for drawing and feeding, and in production process, it is necessary to rely on tension to pull out the film, which is very easy to cause tensile deformation of the film material. High-quality unstretched flat bag machine adopts a dual servo or three servo synchronous control system with dual group rubber roller clamping feeding structure. During ironing and cutting, the film material is fixed and clamped throughout the process, with no instantaneous tension or tension fluctuations. In the selection, the closed-loop constant tension control system is given priority, which can achieve synchronous and uniform feeding, heat pressure and discharge in the whole process, completely eliminate the tensile deformation of thin soft composite film and color-printed aluminum foil film, and ensure uniform bag size and neat graphics and text.
Secondly, the key is the configuration of the heat sealing process, because the quality of heat sealing directly determines the sealing performance and the final product qualification rate. The high-end model adopts the design of the upper and lower separation thermostat, with high temperature control precision and uniform pressure. According to PE film, composite film, aluminum foil film and other different materials can independently adjust the temperature and pressure, effectively avoid the membrane material virtual sealing sealing, leakage, thermal cracking, sealing wrinkle. High-quality hot knife with high temperature, anti-bonding coating, long-term continuous production of non-easy to accumulate carbon, non-binding material, edge sealing smooth and compact, no bubbles or burrs. Poor quality equipment temperature control accuracy is low, heat knife pressure is not uniform, in the production of sensitive materials such as foil aluminum foil bags easy to appear problems such as sealing edge air leakage, cannot meet the high standards of food preservation and sample moisture.
Positioning cutting process is the key index of high precision packaging production, especially for the production of color printed packaging bags. High-quality equipment equipped with a high-sensitivity photoelectric tracking system, response speed is fast, positioning error small. It can accurately capture the printed cursor, to ensure that each batch of packaging bags uniform graphic position, neatly cropped. At the same time, it is equipped with a high-precision flying knife cutting structure. It adopts the process logic of ironing front and back, forming first and cutting later, so as not to exert tension on the sealing position and ensure that the bag is flat and not deformed from the source. At the time of selection, field machine testing can be conducted to observe if the bag length, graphic position, cutting edge is smooth and burrless under high speed production conditions.
Matching machine models with production material is the key to avoid equipment adaptation failure. Basic Stretchless Pocket Machine is suitable for mass production of ordinary thickness films and ordinary unprinted flat bags. It has high value for money and meets the needs of basic packaging production. The dual servo high-end model is suitable for flexible film, high-definition color printing printing film, pure aluminum foil film, etc. It is important to note that this equipment is specifically designed for flat bag production and should not be used blindly to process irregular bags such as self-holding bags, organ bags bags, etc., in order to avoid equipment wear and product scrap.
The structure and intelligent configuration of the equipment determine the long-term production stability and operation and maintenance costs. Preference is given to thickened, stable racks that operate at high speed without shaking or distortion, ensuring long-term production accuracy. With intelligent PLC touchscreen control system, parameters are saved and quickly switched, greatly improving material exchange and adjustment efficiency and reducing downtime losses. At the same time, check the equipment's correction and buffer storage structure. Automatic correction function can effectively prevent the deviation of thin film material, adapt to the production of wide film, further reduce the waste rate.
In summary, when choosing a non-stretch flat bag bagging machine, not only price, but also production capacity. The servo synchronous feeding system, precise constant temperature heat sealing process and high-precision photoelectric cutting positioning are the three core selection standards of equipment. Combining with its own production materials, bag precision and mass production requirements, it matches the model, and also takes into account stability and intelligent configuration of the equipment. It selects high-quality equipment with high adaptability, high output, durability and stability, effectively reduces production costs and improves the quality and market competitiveness of packaging products.
