A sealing bar in a shrink wrapping machine is an important component that uses heat to join polyethylene (PE) shrink film around grouped products. In a dual-roll shrink wrapping machine, the upper and lower film layers meet at the sealing bar to form a film sleeve before the products enter the heat-shrink tunnel.
How a Sealing Bar in a Shrink Wrapping Machine Works
The KOMAL S-Series includes three automatic shrink wrapping machine models: S10, S15, and S20. All three models support multi-lane product infeed and are designed exclusively for transparent polyethylene (PE) shrink film.
Learn more about KOMALPACK S-Series automatic shrink wrapping machines, including the S10, S15, and S20 models.
Each model uses a dual-roll film feeding system and is suitable for packaging grouped products in small and medium-sized production facilities. Depending on the model, the maximum packaging speed ranges from 10 to 20 cycles per minute.
How the Dual-Roll Sealing System Works
The S-Series uses two rolls of transparent PE shrink film, with one roll positioned above the product conveyor and another below it.
The upper and lower films are joined to form a film curtain. When a group of products reaches the wrapping position, a pneumatic pushing mechanism moves the products through the film curtain.
The sealing bar then moves downward to heat-seal and cut the film, forming a film sleeve around the grouped products. At the same time, the film curtain is rejoined for the next packaging cycle.
This process creates a visible seal line where the two layers of PE film are joined.
Applications
The S-Series is suitable for shrink wrapping grouped products such as bottled beverages, cans, cartons, soap bars, toothpaste boxes, paper reams, and shoe boxes.
KOMAL S-Series Models
S10 – Automatic Shrink Wrapping Machine
The KOMAL S10 is an automatic shrink wrapping machine with 90-degree product infeed and multi-lane feeding capability. It is designed for lower-speed packaging applications, with a maximum packaging speed of 10 cycles per minute.
S15 – Continuous-Motion Shrink Wrapping Machine
The KOMAL S15 features continuous-motion operation, inline product infeed, and multi-lane feeding capability. It is designed for medium-speed packaging applications, with a maximum packaging speed of 15 cycles per minute.
S20 – Fully Automatic Inline Shrink Wrapping Machine
The KOMAL S20 is a fully automatic inline shrink wrapping machine with multi-lane product infeed and a dual-roll transparent PE shrink film feeding system. It is designed for higher-speed packaging applications, with a maximum packaging speed of 20 cycles per minute.
Technical Specifications
| Technical Specification | S10 | S15 | S20 |
|---|---|---|---|
| Film Type | Transparent PE Shrink Film | Transparent PE Shrink Film | Transparent PE Shrink Film |
| Film Feeding System | Dual-Roll | Dual-Roll | Dual-Roll |
| Product Infeed | Multi-Lane | Multi-Lane | Multi-Lane |
| Film Thickness | 0.03–0.15 mm | 0.07–0.10 mm | 0.07–0.10 mm |
| Shrink Tunnel Temperature | 160–260°C, Adjustable | 160–260°C, Adjustable | 160–260°C, Adjustable |
| Installed Power | 18 kW | 25 kW | 30 kW |
| Maximum Packaging Speed | 10 cycles/min | 15 cycles/min | 20 cycles/min |
| Maximum Pack Size (L × W × H) | 600 × 400 × 350 mm | 420 × 280 × 350 mm | 420 × 280 × 350 mm |
| Machine Dimensions (L × W × H) | 5050 × 3300 × 2100 mm | 8400 × 1250 × 2200 mm | 12000 × 1250 × 2200 mm |
| Machine Weight | 1200 kg | 2000 kg | 2500 kg |
Technical specifications are based on standard model configurations and may vary according to the final equipment configuration.
