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The door is designed for high-speed and dynamic detection of product weight on the assembly line.

Working Principle:

Product transportation: The product enters the weighing scale area through a conveyor belt (usually a belt).

Dynamic weighing: When a product passes through a high-precision weighing sensor (usually a strain gauge sensor), the system captures the weight signal of the product in a very short time. This is different from weighing on a static electronic scale, as it requires handling interference such as vibrations caused by product movement.

Data comparison: The built-in processor (or connected PLC/industrial computer) compares the measured weight in real-time with the preset qualified weight range (such as upper and lower limits).

Result judgment and sorting: The system immediately makes a judgment (qualified, overweight, underweight) and triggers the corresponding executing mechanism.

Key components:

Weighing platform/scale body: The core weighing part is equipped with high-precision sensors.

Conveyor system: usually a belt to ensure smooth passage of products.

Control system: Industrial computer or PLC, responsible for data processing, logical judgment, and human-computer interaction.

Human computer interface: touch screen, used for setting parameters, viewing data, and statistical reports.

Sorting/removal device (optional, but usually): Based on the judgment result, unqualified products are automatically removed from the assembly line.

2、 Common types of dynamic weighing scales based on different sorting methods

The sorting method is an important consideration when selecting equipment, mainly depending on the characteristics of the product (shape, material, fragility) and the speed of the production line.

Push rod/toggle type removal

Description: Unqualified products are laterally pushed away from the main conveyor line by a push rod or swing arm driven by a cylinder.

Applicable: Suitable for packaging with stable flat surfaces such as boxes and bagged products, with moderate speed.

Swing arm/lifting baffle type removal

Description: Install a baffle at the diversion port. When qualified products pass through, the baffle should be retracted, and when unqualified products pass through, the baffle should be raised to guide them into the defective product channel.

Applicable: Suitable for various packaging forms, especially for products that are heavy or prone to rolling.

Air blowing removal

Description: Use a compressed air nozzle to blow off defective products from the conveyor belt with precise short airflow.

Applicable: Suitable for products with light weight and small volume (such as small medicine bottles, small bags of seasonings, electronic components), very fast speed, non-contact, and no physical impact on the product.

Falling/valve type removal

Description: There is a valve at the bottom of the weighing area. When qualified products pass through, the valve closes, and when unqualified products pass through, the valve opens instantly, allowing them to fall into the defective box below.

Applicable: Suitable for products that will not be damaged by free fall, such as screws, nuts, candies, etc.

Split flow exclusion

Description: By dividing the conveyor belt into two or more strands and using guiding devices to guide non-conforming products into different channels.