Precision Slitting

Precision slitting is a high-precision cutting process that cuts large rolls of material (such as metal, plastic, steel, aluminum, etc.) into smaller rolls of a specific width. This technology is widely used in various industries and, due to its high precision and efficiency, plays a crucial role in fields with extremely high requirements for quality and precise control.

Sage Intelligent Technology Co., Ltd. specializes in the production of plastic film materials such as PVA, WTP, IMD, and OMD, and provides precision slitting services, mainly for plastic film materials.

The precision slitting industry is broad, and different precision slitting machines are available for different applications to meet the needs of various industries. Sage specializes in providing precision slitting machines suitable for various types of plastic films. Below are some common applications of precision slitting.

• Electronics and Semiconductors:Used for precision cutting of optical thin films, conductive films for touch screens, flexible electronics, lithium battery foil, printed circuit boards (PCBs), thin-film transistors (TFTs), and sensor materials.
• Lithium battery materials:Precise cutting of the positive and negative electrode foils and battery separator of lithium batteries improves battery performance and safety.
• Photovoltaic industry:Used for cutting solar thin films, photovoltaic thin films, and protective films for photovoltaic modules to ensure their compatibility with photovoltaic modules.
• Optical and display technologies:Precision cutting of display protective films, lens films, optical films, polarizers, and LCD displays ensures high precision and quality.
• Medical field:Precise cutting of medical film materials, such as patches, breathable membranes, diagnostic reagent films, and medical devices, to ensure stability and safety.
• Packaging materials:Used for cutting flexible packaging materials such as food packaging film, cling film, aluminum foil, and plastic film to ensure they meet size and automated packaging requirements.
• Automotive Industry and Metal Materials:We can cut steel plates, aluminum alloys, interior films, battery modules, automotive window films, heat insulation films, metal foils, steel strips, plastic strips, aluminum plates, etc., to meet various shape and size requirements. They are widely used in construction, machinery, aerospace and other fields.
• Print and Media:Cutting printing materials and digital printing films (digital films) for use in the printing and media industries.
• Aerospace and Military:Precision cutting of aerospace materials and military equipment, with applications in the aerospace and military fields.

• Accuracy:Precision slitting requires high precision, typically controlled at the micrometer level, and is suitable for high-precision fields such as electronics and semiconductors. In contrast, ordinary slitting has lower precision and is suitable for general metals, plastics, and other materials.
• Materials and Applications:Precision slitting is often used for high-end materials, such as lithium battery foil and optical films, while ordinary slitting is mostly used for general metals and packaging materials.
• equipment:Precision slitting machines offer higher precision control and utilize advanced tension control systems and precision guides to ensure that each small roll has the same width, smooth edges, and perfectly matches the set size. Ordinary slitting machines are simpler and therefore find it more difficult to achieve the same level of precision and consistency.
• Cutting effect:Precision slitting produces smooth, burr-free edges, while ordinary slitting may result in rougher edges.
• cost:Precision slitting equipment and processes are more expensive, while ordinary slitting is less expensive.

Precision slitting is suitable for high-end products with high precision requirements, while ordinary slitting is suitable for cutting general materials.

Precision slitting machines can be categorized based on the material being slitted, including film slitting, paper slitting, metal foil slitting, and fabric slitting. Sage Chengfeng Intelligent primarily provides precision film slitting services. Precision film slitting is a highly accurate cutting process mainly used for dividing film materials, commonly found in the processing of plastic films, optical films, and electronic films. This process is characterized by its ability to cut large rolls of film material into smaller rolls or strips while maintaining high precision and consistency. Precision slitting typically requires precise control over the cut width, thickness, and edge smoothness, even down to the micrometer level.

Key features and process of precision thin film slitting:

• High-precision control:Precision slitting utilizes advanced equipment and technology, such as a high-precision tension control system, precision guide rails, and tool settings, to ensure that each cut film has a completely consistent width and smooth, flat edges.
• consistency:During slitting, it is ensured that the dimensions of each roll of film perfectly match the preset specifications, whether it is the width, thickness or length of the roll, which is especially important in high-precision applications.
• Application areas:Precision slitting of thin films is widely used in industries such as electronics, semiconductors, optics, lithium battery foil, medical, and packaging. Especially in fields with extremely high precision requirements (such as packaging films for electronic products and semiconductor process materials), precision slitting technology can effectively improve product quality and reliability.
• Cutting effect:Precision slitting can achieve smooth edges, no burrs, and no deformation, which is crucial for subsequent processing of thin film materials (such as lamination, printing, etc.).

Precision slitting of thin films is not just a simple cutting process; it requires advanced technology and equipment to ensure precision, quality, and production efficiency, and is suitable for high-end materials and applications.

• Uneven or rough edges:This is usually caused by dull cutting tools, unstable tension control, or inaccurate guide rail alignment in the cutting equipment. Uneven edges will affect subsequent use and processing.
• Dimensional tolerances:The width of the slit film may vary, which is usually related to the tension control system, tool settings, or the characteristics of the material itself. Dimensional deviations can affect the automation of the production line and the adaptability of the product.
• Material wrinkling or deformation:This is caused by excessive tension on the material or improper equipment settings during the slitting process, which can lead to wrinkles or deformation of the film after slitting, affecting subsequent processing.
• Material tearing or breaking:When the film material is too fragile or the cutting tool is too dull, tearing or breakage can easily occur during the slitting process, which not only wastes material but may also cause machine failure.
• Surface damage:Thin film surfaces can be damaged by friction, poor contact, or equipment instability during the cutting process. This is especially important for applications requiring flawless surfaces, such as optical films.
• Unstable tension:Improper tension control system settings may cause excessive stretching or relaxation of the film during slitting, which will affect the cutting quality and consistency.
• Material rebound:Some materials exhibit springback after being cut, leading to dimensional instability. This is typically seen in thicker or stiffer thin film materials.
• Speed mismatch:If the slitting speed is not matched with the material properties or equipment capacity, it may cause uneven cutting or excessive wear, thus affecting the slitting effect.
• Static electricity buildup:In some plastic film slitting processes, static electricity buildup can cause materials to stick together, increasing the difficulty of slitting and potentially causing equipment malfunctions.

Solving problems in the slitting process requires precise equipment calibration, tool maintenance, a stable tension control system, and slitting parameter settings tailored to material properties. Sage utilizes precision-designed and high-efficiency customized machines, combined with cutting-edge technology, to achieve outstanding performance in precision control, stability, and adaptability.

Our equipment effectively addresses the needs for tension control, tool cutting, and static electricity management, significantly reducing defects during the slitting process and substantially improving production efficiency and product quality. Our machines are specifically designed for high-end applications, resolving technical challenges such as uneven edges, dimensional deviations, and material wrinkling, fully meeting customers' demands for precision slitting and high-quality products.

Controlling the slitting accuracy of a precision film slitting machine is crucial to ensuring the film maintains its standard and high quality during the slitting process. The methods for controlling slitting accuracy mainly include the following aspects:

• Tension control:In the film slitting process, tension stability is crucial for slitting accuracy. Using a tension control system, such as a servo motor-driven tension controller, the film tension can be adjusted in real time, preventing deformation or breakage due to excessive or insufficient tension. This maintains the uniformity and precision of the slitting process.
• Adjustment of slitting cutter:The cutters of a slitting machine should be set with good parallelism and cutting angle to ensure smooth, burr-free cut edges. The precision and sharpness of the cutters directly affect the slitting accuracy, therefore, regular inspection and maintenance of the cutters are necessary.
• Precise control of the transmission system:A sophisticated servo drive system ensures that the film passes through the slitting machine at a stable and accurate speed, avoiding slitting errors caused by uneven or excessive speed.
• Stability of the material feeding system:The material feeding system must be kept uniform to avoid positional shifts or wavy phenomena when the film enters the slitting machine, thus ensuring the accuracy of slitting.
• Fine-tuning of the slit spacing:The slitting gap of a slitting machine needs to be fine-tuned according to the thickness and material of the film; a gap that is too large or too small will affect the slitting accuracy. Precision slitting machines are usually equipped with precision adjustment devices for fine-tuning the gap between the cutters.
• Temperature control:Some film materials (such as PE and PVC) are quite sensitive to temperature. Therefore, controlling the ambient temperature and the working temperature of the film during the slitting process is very important for maintaining slitting accuracy.
• Image or fiber optic inspection systems:Modern slitting machines can be equipped with image recognition systems or fiber optic sensors to detect the position and edge accuracy of the slitting film, and ensure accuracy through an automatic correction system.

Whether burrs will appear after film slitting depends on several factors, including the slitting machine settings, the properties of the film material, and the condition of the cutting tools. Key influencing factors include the following:

• Tool status:A sharp blade ensures clean cuts and reduces burrs. Worn blades result in rough edges and require regular maintenance.
• Slit gap:If the gap is too large, the cutting will be incomplete; if it is too small, it will be over-compressed. Precise adjustment of the gap is therefore very important.
• Material properties:Softer or thinner films (such as PVC) are prone to burrs, while harder films may crack.
• Operating conditions:Cutting speed and tension that are too fast or unstable can cause material deformation. Therefore, it is important to maintain a moderate speed and stable tension.
• Cooling measures:A proper cooling system can reduce the temperature during the cutting process and improve edge quality.

By maintaining the cutting tools, precisely adjusting parameters, and ensuring stable operation, burr formation can be effectively reduced, thus improving the quality of film slitting.

The maximum cutting thickness and width of a precision slitting machine can vary due to a number of factors, primarily including machine design, cutter configuration, slitting machine technical parameters, and the characteristics of the film material. Below are some common ranges and influencing factors:

• film thickness
  • General precision slitting machine:Materials ranging from 10 micrometers (μm) to 500 micrometers (μm) can be processed by some advanced equipment, with some advanced equipment capable of handling materials from 500 micrometers (μm) to 1 centimeter (mm) or thicker.
  • Sage Intelligent uses the Changqing EG-7003AT slitting machine:The maximum film thickness can reach 400 micrometers (μm), making it suitable for most thin film applications.
• Membrane width range
  • General precision slitting machine:1 meter (m) to 2.5 meters (m), special equipment can reach 3 meters (m) or more.
  • Changqing EG-7003AT Slitting Machine:The maximum membrane width can reach 1300 cm (mm).
• Influencing factors
  • Tool settings:The blades of a precision slitting machine need to be selected according to the thickness and material of the film. Thick films require stronger cutting force and sharper blades, while thin films require more precise blades and smaller cutting gaps.
  • Mechanical structure:Wide-width films require a large slitting machine for support, and must have a high-precision drive and positioning system to ensure uniform and accurate slitting.
  • Film material properties:Different membrane materials have different requirements when slitting. Brittle films (like plastic films) are not suitable for cutting too thick or too wide, while flexible films (like thin aluminum foil) require precise tension control.

The film slitting process generates waste materials such as scraps, cutting debris, and burrs. The following are common waste disposal methods:

1. Recycling and reuse of scrap materials
   • Scrap material recycling:Plastic or metal scraps generated during the slitting process can be recycled and reprocessed, reducing material waste.
   • Automatic recycling device:Modern slitting machines are equipped with automatic waste collection and compression systems, which facilitates later processing and reuse, improving overall efficiency.
2. Debris and burr removal
   • Debris collection system:The debris generated during the cutting process is collected into a dust collection device through a vacuum or airflow system to prevent fine particles from spreading into the air.
   • Deburring equipment:Burrs are removed through tool fine-tuning or edge trimming systems to ensure the quality of subsequent processing.
3. Waste sorting and sorting
   • Material classification and processing:Classifying films according to their material (such as plastic film or metal film) facilitates different recycling methods.
   • Avoid cross-contamination:For high-end thin film materials (such as semiconductor thin films and electronic thin films), precise classification is required to ensure that they can be reused or safely disposed of.
4. Environmental protection treatment and waste reduction measures
   • Reduce waste generation:Through the precise design and cutting optimization of the slitting machine, material utilization is improved and waste is reduced.
   • Environmentally friendly recycling technology:Waste materials may undergo multiple processes during recycling, such as washing, compression, and melting, before being made into recycled materials or used for other industrial purposes. This helps reduce environmental impact and meets the requirements of modern enterprises for sustainable development.
5. Reuse and Safe Disposal of Waste
   • Waste recycling:Plastic film waste can be melted and modified for use in the production of new products, thus achieving resource recycling.
   • Safe disposal of waste:Waste that cannot be recycled must be incinerated or landfilled in accordance with environmental regulations to avoid pollution.

Waste management in the film slitting process includes collection, sorting, recycling, and environmentally friendly treatment. This not only improves production efficiency and reduces waste, but also mitigates environmental impact and lowers business operating costs.

To ensure quality control and dimensional accuracy in precision slitting, the following aspects can be managed and inspected:

1. Choose high-precision equipment
   • High-precision slitting equipment should be used, which should have stable operating performance and fine-tuning functions to ensure accuracy in each slitting process.
   • The equipment needs to be maintained and calibrated regularly to ensure it is in good working order and to avoid affecting the slitting quality due to equipment failure or wear.
2. Inspection of raw materials
   • Before slitting, the raw materials undergo a comprehensive inspection to ensure that their thickness, width, surface quality, and other characteristics meet the requirements. This helps ensure that the slitting products maintain consistency and stability.
   • For example, the uniformity and flawlessness of materials such as metals and plastics are crucial to the quality of slitting.
3. Precision measurement and monitoring
   • Precision measuring tools, such as laser rangefinders, electronic calipers, and image inspection systems, are used during the slitting process to inspect the dimensions and shape of the slitting material in real time.
   • An automated inspection system can be set up to identify and alert on dimensional deviations in real time during the slitting process.
4. Process (step) setting and adjustment
   • During the slitting process, it is crucial to control various process parameters, such as cutting speed, tool pressure, and tension, as these parameters directly affect the slitting accuracy.
   • The process needs to be adjusted regularly, and the slitting process parameters should be adjusted according to the characteristics of different materials.
5. Strict quality testing standards
   • Establish clear quality inspection standards to ensure that every batch of slitting products meets the customer's size and surface requirements.
   • Regularly conduct random sampling inspections of samples and record all test data to promptly identify and correct any problems.
6. Data analysis and feedback mechanism
   • By leveraging big data and intelligent systems, we collect and analyze various data points during the stripping process, and continuously improve the system based on data feedback.
   • A robust feedback mechanism is in place to quickly adjust the production process and prevent problems from escalating when quality fluctuations are detected.
7. Operator training and experience accumulation
   • Provide professional training to operators to improve their operational skills and quality control awareness.
   • Experienced operators can promptly identify and address any anomalies during the slitting process, ensuring consistent product quality.
8. Quality Records and Traceability
   • Establishing complete quality records and traceability data, and clearly labeling each batch of slit products, enables us to trace the source of problems and handle them quickly when quality issues arise.

These combined measures can effectively ensure quality control and dimensional accuracy in precision slitting, achieving a stable and efficient production process.

The processing speed and delivery time of precision slitting of thin films depend on the following factors:

• Thin film types and thickness
  Metal films and high-performance plastic films are difficult to cut, which affects the processing speed; the thinner the film, the faster the slitting, but too thin a film will also increase the difficulty of slitting.
• Slitting equipment performance
  Advanced equipment can improve speed and accuracy, while older equipment may require more human intervention.
• Slitting width and precision requirements
  Wide-width slitting requires more time to ensure accuracy; micron-level accuracy requires a slower speed and more meticulous adjustments.
• Processing and Quality Inspection
  High-precision slitting requires more time for detailed inspection (dimensional accuracy, surface defects, etc.).
• Delivery period
  Standard delivery time: approximately 3 to 7 days, depending on the processing difficulty; Rush orders: approximately 1 to 2 days, usually requiring additional fees.

Processing speeds range from several meters to tens of meters per minute, while delivery times vary depending on order quantity, materials, and precision. For accurate delivery dates, please contact Sage Chengfeng, providing product specifications and requirements. We will provide a more precise delivery time estimate based on the specific circumstances.

• Thickness uniformity:The film thickness must be uniform to ensure consistent quality in each slit. Uneven film thickness can affect slitting accuracy and result in products that do not meet dimensional requirements.
• Surface finish:The surface of the film should be smooth and free of defects, avoiding unevenness or air bubbles, as these will affect the stability during the slitting process and subsequent use.
• Tensile strength and ductility:The film should have sufficient tensile strength and ductility to prevent cracking or tearing during slitting. Insufficient tensile strength will affect the stability and accuracy of slitting.
• Bending and flexibility:The film should have moderate flexibility and bendability to prevent breakage during slitting due to excessive stiffness or brittleness. Appropriate flexibility ensures the film remains stable after slitting and can be adapted for subsequent processing.
• Surface adhesion and cleanliness:The surface of the film should be kept clean and free of oil, dust, and other contaminants. These contaminants can affect the operation of the slitting machine and may also affect the post-processing results of the film.
• Physical and chemical stability:The film needs to have a certain degree of physical and chemical stability to withstand the mechanical forces and environmental changes during the slitting process, such as fluctuations in temperature or humidity, so as to avoid the degradation of the film's performance after slitting.

These quality requirements ensure a smooth film slitting process and guarantee the quality of the final product.