The Ultimate Guide for Stick Pack Machine Solving Inaccurate Cutting

Key Points

• The color mark detection system controls packaging film positioning, and the photoelectric eye is the first component to check when cutting deviations occur.
• The coordination between heat sealing and cutting depends on accurate color mark detection timing. Proper synchronization is essential to achieve precise cutting.
• The cutting knife position, blade condition, and adjustment method directly determine the final cutting performance and packaging consistency.

Quả sung 1. The varying sealing positions on products cut by vertical packaging machines lead to inconsistent finished product sizes, with rough burrs remaining at the seals.

Giới thiệu

Fully automatic stick packaging machines are widely used in the pharmaceutical, dinh dưỡng, đồ ăn, and daily chemical industries. GMP standard stick pack filling machine can automatically package various materials, bao gồm cả bột, hạt, chất lỏng, và bột nhão.

Trong quá trình sản xuất liên tục, deviation of the cutting position between connected stick packs may result in inconsistent pouch lengths, misalignment between sealing and cutting processes, and uneven finished products.

When single-lane or multi-lane stick packaging machines produce pouches with inconsistent lengths or inclined cutting lines, many users first check whether there is a problem with the cutting knife. Tuy nhiên, the cutting result is not determined by a single component. The accuracy of color mark detection on the packaging film and whether the heat sealing jaws clamp at the correct position also affect the final packaging quality.

Vì thế, solving inaccurate cutting problems in powder stick pack machine requires analysis and adjustment of the entire packaging process. This article will discuss three key factors affecting stick pack cutting accuracy: color mark detection, synchronization between the heat sealing system and cutting process, and cutting knife adjustment.

1. Abnormal Color Mark Detection Is a Major Cause of Cutting Position Deviation in Stick Sachet Packing Machine

For pharmaceutical powder sachet filler, the color mark detection system is mainly responsible for identifying positioning marks on the packaging film and controlling the machine to perform packaging and cutting according to the preset length. Vì thế, the accuracy of color mark detection directly affects the cutting precision of powder stick pack machine.

According to different client requirements, the color marks on packaging films can be designed on either one side or both sides of the film. It should be noted that no text or patterns should be printed between the two color marks, as this may interfere with the accuracy of the photoelectric detection.

When a sachet stick pack machine experiences cutting position deviation, the following points should be checked first:

1. Check Whether the Color Mark Position Meets Detection Requirements

• Whether the contrast of the color mark meets the detection requirements;
• Whether the printed patterns affect the detection area.

2. Adjust the Sensitivity of the Photoelectric Sensor

Both single and multi-lane stick pack machines are designed for different size of packaging film materials. The following colour mark adjustment factors should be measured during adjustment:

1. The actual distance between two color marks (mm);
2. The traveling distance of color mark.

Based on the measurement results, adjusting the color mark movement distance can help the machine complete subsequent heat sealing and cutting operations significantly more accurate, thereby producing finished products with consistent dimensions.

Different products may use different color mark designs. Ví dụ, back seal sauce packaging machines and three-side seal vertical granule packaging machines may use packaging films with different color mark layouts.

During machine commissioning, it is recommended to first complete parameter adjustment using empty pouches. After the basic settings are confirmed, adjustments can then be made with filled pouches. This method helps reduce packaging film and raw material waste during testing.

Quả sung 2. Different seal types demand different color mark layouts; proper commissioning with empty pouches ensures accuracy before production runs.

2. Color Mark Detection Position Adjustment Affects Heat Sealing and Packaging Consistency of VSSF packing machine

After completing color mark detection, the machine needs to control the subsequent heat sealing and cutting processes according to the detected signals. Vì thế, the adjustment of the photoelectric eye detection position directly affects the stability of the heat sealing process in sachet cartoning machine.

During stick pack production, the packaging film needs to complete a series of continuous operations, including film feeding, color mark positioning, niêm phong nhiệt, và cắt.

Since the heat sealing station position is fixed, the machine mainly adjusts the position of the photoelectric sensor to ensure that the color mark detection timing matches the heat sealing operation.

If the detection timing is inaccurate, it may cause heat sealing position deviation and inconsistent sealing length, which will further affect the cutting result.

1. Adjust the Photoelectric Sensor Position to Match the Heat Sealing Process

• Photoelectric sensor detection position too far forward:
  The machine identifies the color mark earlier, and the subsequent heat sealing action will also occur earlier.
• Photoelectric sensor detection position too far backward:
  The machine identifies the color mark later, and the heat sealing action will be delayed accordingly.

By adjusting the photoelectric sensor position on sachet packing machine, the packaging film positioning, niêm phong nhiệt, and cutting processes can remain synchronized, reducing sealing position deviation and cutting errors.

2. Adjust Operating Parameters Through the Touch Screen

In addition to mechanical position adjustment, the VSSF packing machine are usually equipped with a touch screen control system(Siemens). Engineers can optimize machine operating sequences by adjusting relevant parameters.

During the commissioning process, adjustments should be made based on the following factors:

• Packaging film length;
• Distance between color marks;
• Actual heat sealing and cutting performance.

By adjusting the operating parameters on the touch screen, the coordination between color mark detection, niêm phong nhiệt, and cutting can be further optimized, ensuring that the sealing position matches the cutting position.

Stable heat sealing operation not only ensures sealing quality but also reduces packaging defects such as rough edges and uneven product sizes, caused by positioning deviations. Ensuring all stations function properly can significantly improve packaging consistency during long-term operation of powder stick pack machine.

3. Cutting Knife Adjustment: The Last Factor Affects Cutting Accuracy on Stick Pack Machines

The cutting knife is the key mechanism responsible for the final separation of packages in a sachet stick packing machine. Without a function able cutting knife the final product might be not separating completely or has rough edges, causing quality concerns:

• Cutting position deviation, resulting in inconsistent pouch lengths;
• Rough edges that may hurt hands
• Inclined cutting lines that do not meet the designed cutting requirements.

1. Adjust the Vertical Position of the Cutting Knife

The cutting knife of a granule sachet packing machine is usually adjusted by changing its installation position through adjustment screws, allowing movement in the vertical direction.

During adjustment, operators should check whether the sealing lengths at the upper and lower ends of the finished pouches are consistent.

If one side of the package is longer while the other side is shorter, the cutting knife position needs to be readjusted.

2. Solving the Cutting Inclination Problems

When the cutting line app ears inclined, in addition to checking the installation condition of the cutting knife, position compensation can also be performed by adding shims or copper sheets to ensure that the cutting knife reaches a more accurate horizontal position for single-lane stick pack machine and multi-lane stick pack machine.

Hơn nữa, during long-term operation of the stick pack packaging machine, blade wear and changes in cutting clearance may also affect cutting performance.

Vì thế, regularly checking the cutting knife condition and performing maintenance according to production requirements can effectively maintain the stable operation of sachet stick packing machine.

A short video presenting Sugar Stick Filling Packing Machine:

4. Stable Control System Ensures Long-Term Packaging Accuracy of Powder Sachet Packing Machine

In addition to color mark detection, niêm phong nhiệt, and cutting knife adjustment, the overall machine structure and control system also play an important role in maintaining the long-term stability of vertical packaging machines.

Taking the Ruida Packing RD-SPM 480 multi-lane vertical packaging machine as an example, this machine adopts a stable automatic control system and is designed for stick pack production requirements. It can achieve a production speed of up to 240 túi/phút.

During the packaging process, stable film feeding, precise positioning, and reliable heat sealing structures help reduce packaging deviation during continuous operation.

The RD-SPM 480 multi-lane vertical packaging machine is equipped with:

• Servo motor control system;
• Siemens touch screen from Germany;
• AirTac pneumatic cylinders from Taiwan;
• Omron thermo-couples from Japan;
• Schneider electrical components from France.

These components not only helps the machine maintain stable operation, but also can be purchase internationally. These improve parameter adjustment convenience, and meet the requirements for packaging consistency in industries such as pharmaceuticals, đồ ăn, daily chemicals, and nutraceutical.

The RD-SPM 480 six-lane vertical packaging machine can achieve different packaging styles by replacing forming molds, bao gồm:

• Back seal;
• Three-side seal;
• Four-side seal;
• Special-shaped seal.

Quả sung 3. The RD-SPM 480 six-lane packaging machine can achieve back seal, con dấu ba mặt, con dấu bốn phía, and special-shaped seals by simply changing the forming dies.

 

Phần kết luận

Insufficient cutting accuracy in vertical packaging machines is not always caused by the cutting knife alone. Thay vì, it is affected by the coordination of three key packaging processes in VSSF packing machine.

The color mark detection system on the stick pack machine determines the timing at which the machine identifies the positioning marks on the packaging film. The heat sealing station needs to match the detected timing and distance of the color marks, allowing the heat sealing jaws(sponges) to accurately clamp and seal the packaging film, release excessive air and seals the sachet.

Cuối cùng, the height adjustment of the cutting knife on the sachet cartoning machine determines the cutting position. The cutting knife should precisely cut through the heat-sealed area between individual packages to ensure consistent pouch separation.

For manufacturers requiring long-term stable powder or liquid sachet production, selecting a stick pouch packing machine with a precise control system and reliable structural design can reduce adjustment frequency, improve packaging efficiency, and ensure consistent product quality.

The Ruida Packing RD-SPM 480 six-lane vertical packaging machine provides stable stick pack packaging solutions for industries including pharmaceuticals, đồ ăn, daily chemicals, and nutraceutical through its stable control system, flexible packaging parameters, and reliable mechanical design.

Câu hỏi thường gặp

1. Why does a stick pack packaging machine have cutting position deviation?

Cutting position deviation in vertical packaging machines is usually related to abnormal color mark detection.

When this problem occurs, operators should check the color mark recognition performance, photoelectric eye parameters, and cutting knife installation position to identify the cause and make appropriate adjustments.

2. What products can be packaged by a sachet packing machine?

Vertical form fill seal stick pack machine including coffee powder stick pack machine and milk powder sachet packing machine can be used for automatic packaging of various products:

Pharmaceutical liquids	Traditional Chinese medicine liquids; Liquid pesticides; Herbicides and other pharmaceutical-related liquids.
Daily chemical liquids	Cosmetic liquids; Skin care liquids; Toners; Serums; Perfumes; Facial cleansers; Shampoos; Shower gels; Mouthwashes; Hand sanitizers; Disinfectants; Toilet cleaners; Fabric softeners.
Semi-fluid and paste products	Skin creams; Moisturizing lotions; Other semi-fluid cosmetic products.
Food products	Soy sauce; Sesame oil; Salad oil; Tomato sauce; Satay sauce; Fruit jams.
Powder products	Bột cà phê; Sữa bột; Bột đạm; Matcha powder; Cocoa powder; Seasoning powder; Collagen powder; Bột dược phẩm; Desiccant powders.
Granule products	Đường; Muối; Instant coffee granules; Granular medicine; Hạt giống; Millet; Sunflower seeds.

3. How does a sachet cartoning machine create tear notches?

Whether is a 4-side seal sachet machine or a 3-side seal powder sachet machine, during the horizontal sealing process, after heat sealing is completed, the tear notch cutting mechanism is driven by a pneumatic cylinder. The cutting blade moves inward at the sealing area to create a neat tear notch.

The tear notch mechanism is controlled by an air cylinder, and the pushing blade position can be adjusted left and right to control the size of the notch.

The cutting blade is manufactured from high-quality steel such as 45# steel and undergoes precision surface treatment to ensure smooth cutting performance without burrs or scratches.

According to different packaging requirements, the machine can be equipped with various cutting knife types:

• Flat cutting knife: Suitable for conventional powder packaging, such as coffee powder;
• Serrated cutting knife: Commonly used for puffed food packaging, such as potato chips;
• Arc cutting knife: Creates two small waste pieces at the sealing area, changing sharp corners into smooth curved edges to improve appearance and reduce the risk of scratching.