BSD400B Shrink Tunnel Machine – Heat Shrink Wrapping Oven

Product Description

The SUNAURA BSD400B is a mid-range shrink tunnel machine designed for heat shrink wrapping applications. This machine uses hot air circulation to shrink film tightly around products that have been pre-sealed with an L-bar sealer or sleeve applicator. The BSD400B is part of the BSD series, which includes models BSD200, BSD350, BSD400, and BSD450 with increasing tunnel sizes and heating capacities to accommodate different product dimensions and throughput requirements.

The BSD400 model features a 6.5 KW heating system with a maximum temperature of 200 degrees C, providing sufficient heat for POF, PVC, and PE shrink films. The conveyor speed is adjustable from 0-10 m/min, allowing precise control over the shrink process for different film types and product sizes. The tunnel accommodates products up to 5 KG in weight, making it suitable for a wide range of consumer goods, food products, and industrial items. The insulated tunnel housing ensures energy efficiency and operator safety.

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Technical Specifications – BSD Series Comparison

Key Features of BSD400B Shrink Tunnel

• Hot air circulation system for uniform heat distribution and consistent shrink results
• Adjustable conveyor speed 0-10 m/min for precise shrink control on different films
• 6.5 KW heating system with maximum temperature of 200 degrees C
• Available in four tunnel sizes (BSD200/350/400/450) for different product dimensions
• PID temperature controller for precise temperature management within plus or minus 2 degrees C
• Insulated double-wall tunnel housing for energy efficiency and operator safety
• Stainless steel tunnel interior for corrosion resistance and easy cleaning
• Variable speed conveyor with adjustable height for different product sizes
• Compatible with POF, PVC, and PE shrink films
• CE certified with safety features and emergency stop

Applications of BSD400B Shrink Tunnel

• Food and Beverage: Shrinking film around food gift sets, beverage multipacks, canned goods, and boxed food products. The hot air system provides uniform shrink for professional retail presentation.
• Consumer Goods: Shrink wrapping for stationery sets, household items, toys, games, and gift bundles. The tunnel accommodates various product sizes and shapes.
• Cosmetics and Personal Care: Shrinking film around cosmetic sets, skincare packages, and personal care product bundles for tamper evidence and premium appearance.
• Pharmaceutical Products: Shrink wrapping medicine box sets and healthcare product bundles with tamper-evident film for product security.
• Electronics and Accessories: Shrink wrapping electronic accessory sets, cable packages, and small device bundles for retail display and protection.
• Print Materials: Shrinking film around book sets, magazine bundles, and printed material collections for protection during distribution and retail display.

How Shrink Tunnel Technology Works

A shrink tunnel uses controlled hot air to shrink thermoplastic film tightly around a product. The process begins with a product that has been pre-wrapped and sealed in shrink film (using an L-bar sealer or sleeve applicator). The sealed package is placed on the tunnel conveyor belt, which carries it through the heated tunnel chamber.

Inside the tunnel, hot air is circulated by a blower system, surrounding the package with uniform heat. The heat causes the thermoplastic film molecules to relax and contract, shrinking the film tightly around the product contours. The tunnel temperature and conveyor speed are adjusted based on the film type, product size, and desired shrink tightness. The package exits the tunnel with the film shrunk smoothly and tightly around the product.

The BSD400B uses a PID temperature controller to maintain precise tunnel temperature, and the hot air circulation system ensures uniform heat distribution throughout the tunnel chamber. The insulated double-wall housing retains heat within the tunnel for energy efficiency while keeping the exterior surface at safe temperatures for operator protection.

Frequently Asked Questions

Which BSD model should I choose for my products?

The BSD series includes four models with different tunnel sizes. The BSD200 is the smallest, suitable for small products such as cosmetics and pharmaceuticals. The BSD350 handles medium-sized products such as food boxes and consumer goods. The BSD400 is the standard model for most applications, handling products up to 5 KG. The BSD450 is the largest, handling products up to 10 KG with an 8 KW heating system. Choose the model based on your maximum product dimensions and weight. contact us with your product specifications for a recommendation.

Does the BSD400B include a sealer?

No, the BSD400B is a shrink tunnel only. It shrinks pre-sealed film around products but does not cut or seal the film. A separate L-bar sealer (such as our FQL450LA) or sleeve applicator is required to prepare the film-wrapped package before it enters the tunnel. We also offer integrated sealer and tunnel combo machines (such as the ASS450-AI) that combine both functions. For operations that already have a sealer, the BSD400B tunnel can be purchased separately and connected via a conveyor.

What shrink films are compatible with the machine?

The BSD400B is compatible with polyolefin (POF) shrink film, PVC shrink film, and PE shrink film. POF film requires a tunnel temperature of 150-180 degrees C and is the most popular for retail packaging. PVC film requires 140-160 degrees C and is economical for non-food applications. PE film requires 160-200 degrees C and is used for heavier products. The conveyor speed should be adjusted based on film thickness and product size for optimal shrink results.

How is the temperature controlled?

The BSD400B uses a PID (Proportional-Integral-Derivative) temperature controller for precise temperature management. The digital controller maintains the tunnel temperature within plus or minus 2 degrees C of the set point. The temperature is adjustable from room temperature to 200 degrees C. The hot air circulation system uses a blower to distribute heat evenly throughout the tunnel, ensuring uniform shrink results. The insulated tunnel housing minimizes heat loss for consistent temperature maintenance.

Can the machine handle products with irregular shapes?

Yes, the BSD400B can handle products with irregular shapes. Shrink film conforms to the product shape when heated, making it ideal for irregular, curved, or multi-item packages. For products with deep recesses or sharp corners, we recommend using perforated shrink film or adding vent holes to allow air escape during the shrink process. The conveyor speed can be reduced for complex shapes to allow longer heat exposure for complete film shrinkage.

What is the power consumption of the machine?

The BSD400 model has a power rating of 6.5 KW, which includes the heating elements and blower motor. The actual power consumption varies during operation: the machine draws full power during the initial heating phase (approximately 5-10 minutes to reach operating temperature), then cycles the heaters on and off to maintain the set temperature, resulting in average consumption of approximately 3-4 KW during continuous operation. The insulated tunnel housing minimizes heat loss for energy efficiency.

Can the tunnel be integrated with an existing sealer?

Yes, the BSD400B can be integrated with an existing L-bar sealer or sleeve applicator. The infeed conveyor height and speed can be adjusted to match the sealer output. We provide conveyor connecting hardware and technical support for integration. The tunnel can also be operated independently by manually placing pre-sealed products on the conveyor. For optimal results, the sealer and tunnel conveyor speeds should be synchronized for continuous product flow.