A Guide to Selecting Plastic Granule Packaging Scales

When choosing a granular packaging machine, it is necessary to comprehensively consider factors such as equipment performance, material characteristics, production requirements, and budget. The following are the key points summarized:

I. Clarify Core Requirements

Material characteristics

For free-flowing granular materials (such as rice and seeds), volumetric measurement can be selected, with an error of ±1% - 2%.

For materials with poor fluidity or mixed materials (such as powder and granule mixtures), it is recommended to use weighing or servo screw metering, with an accuracy of up to ±0.1%.

Special materials (such as Chinese herbal granules and corrosive chemicals) require custom-made stainless steel materials or sealed designs.

Output requirements

Small semi-automatic: 10,000 - 30,000 yuan, speed 50 - 90 bags per minute, suitable for start-up enterprises.

Medium-sized fully automatic: 50,000 - 100,000 yuan, speed 150 - 250 bags per minute, high cost performance.

Large fully automatic: 150,000 - 300,000 yuan, speed 300 - 420 bags per minute, suitable for high-output enterprises.

II. Core Parameter Comparison

Parameter selection suggestions

Sealing method: Three-side seal and four-side seal have high versatility, while back seal is suitable for irregular-shaped packaging. The heat sealing temperature should be compatible with the material (such as PE film).

Degree of automation: Fully automatic saves labor but is costly; semi-automatic requires manual bagging and is suitable for small batches.

For brand configuration, prioritize mature brands such as Strong Bull, Xinyuan, and Hengwei. The system will be more stable when equipped with imported servo motors/PLC systems.

III. Key Points to Note

Field test

Request the manufacturer to provide a trial run of the materials to verify the accuracy (for example, the error of 5g particles ≤ 0.2g) and speed.

Check whether the vulnerable parts (such as the heat sealing knife and the screw) are easy to replace.

Additional functions

Ink wheel coding machines are superior to ribbon coding machines, and hard stamping is suitable for simple batch numbers.

Dust removal design: Powder materials should be equipped with vacuum dust collection or closed discharge.

After-sales service

Confirm the warranty period (usually one year) and the response time for maintenance, and give priority to brands with local service outlets.

IV. Budget and Model Recommendations

Budget range Recommended models Applicable scenarios

10,000 - 30,000 yuan: Small semi-automatic volumetric type (such as PL50K), suitable for low-speed packaging of small bags of snacks, seeds, etc.

50,000 to 100,000 yuan, medium-sized fully automatic weighing type (such as DCS series), suitable for medium to high output of chemical particles, feed, etc.

For orders over 150,000 yuan, we offer custom multi-column models (such as SK900) for pharmaceutical and high-precision food-grade production.

V. Maintenance and Usage

Daily maintenance: Lubricate the bearings/gears monthly and clean the residue in the hopper; calibrate the sensors regularly.

Troubleshooting: If the sealing is not tight, adjust the temperature control (with ±1℃ accuracy). If the material feeding is stuck, clean the screw.

It is recommended to refer to detailed parameters from sources such as suggestions and comparisons, and contact the manufacturer to obtain a customized solution.