Metal Tube Filling and Sealing Machine

I. Structure and Working Principle

The metal tube filling and sealing machine employs a rotary design to achieve efficient and continuous filling and sealing operations.

Rotary and Clamping System: The core is a circular rotary mechanism with multiple material cups or clamping stations. These clamping components are precisely designed; for example, some machines use mounting bases with connecting frames and sliders that engage with grooves on the rotary table to ensure stable clamping and accurate positioning of the metal tube during high-speed rotation.

Precise Transmission: The rotary table is typically driven by a stepper motor or servo motor through a transmission system, achieving precise intermittent rotational motion and ensuring accurate completion of the corresponding operation when each station pauses.

Station Collaboration: Multiple stations are arranged around the rotary table according to the process flow, mainly including: automatic tube loading, label identification and positioning (e.g., using photoelectric sensors), filling, tail flattening, multiple folds (e.g., single, double, or even saddle-shaped folds), shaping, code printing, and automatic tube unloading.

Filling and Sealing Execution: Filling is mostly done by inserting nozzles deep into the bottom of the tube. Sealing the end is crucial. A robotic arm is used to fold and compact the flattened pipe end multiple times to ensure a firm seal.

II. Filling Performance

High Filling Accuracy: Excellent models can control filling accuracy to ≤±1%, which is crucial for cost control and quality assurance.

High Production Efficiency and Flexibility: Rotary automated operation with high speed. By changing a few parts, a single machine can often handle metal tubes of different specifications and achieve various sealing methods such as two-fold and three-fold sealing.

Stability, Reliability, and Intelligent Control: Modern equipment uses PLC program control, achieving a high degree of automation. It offers good stability and can operate continuously for extended periods.

III. Comparison with Tube Filling and Sealing Machines

This comparison focuses primarily on the differences between filling and sealing machines for metal tubes and those for non-metallic tubes (plastics, composite materials, etc.).

1)Packaging Container and Material Characteristics

Metal Tubes: Primarily aluminum tubes, offering excellent protection for contents (such as ointments, high-value cosmetics), completely light-proof, high barrier properties (oxygen-proof, moisture-proof), and good chemical stability. They have a premium feel but are easily corroded by the contents and cannot be resealed after opening.

Non-metallic Tubes: Such as plastics (PE, PP, etc.) or composite materials, offering **good flexibility, less prone to cracking, and diverse designs. However, they may be permeable to air and light, and their protection for sensitive ingredients is not as good as metal tubes.

2)Equipment and Process Differences

Sealing Method: Metal tubes use mechanical folding sealing (such as two-fold, three-fold, saddle-shaped folds). Non-metallic flexible tubes primarily employ heat-sealing (heating to melt the inner lining of the tube end and then applying pressure to bond it).

Filling adaptability: Metallic tube filling, due to its excellent barrier properties, is more suitable for products sensitive to oxygen and light (such as certain ointments and highly active cosmetics). Non-metallic flexible tube filling is widely used in daily chemicals, toothpaste, and cosmetics where barrier requirements are not high.

Equipment features: Both have similar core structures (rotary table, transmission, control), with the main difference lying in the sealing mechanism and its compatibility with specific packaging materials.

IV. Why Choosing a Metal Tube Filling and Sealing Machine

The selection of a metal tube filling and sealing machine is primarily based on a comprehensive consideration of product characteristics, packaging requirements, and production efficiency.

- When your product requires optimal protection (e.g., light- and oxygen-sensitive ointments, highly active cosmetics).

- When you seek a premium feel and classic image in your packaging.

- When your product requires rigid packaging (e.g., certain viscous pastes).

- When you require high filling accuracy and stable and reliable mechanized sealing.