SK-L420 Salt Packaging Machine with Rotary Measuring Cup

1.Product Video: 2 kg Edible Salt Automatic Packaging

In the demonstration video, the SK-L420 packages 2 kg of edible salt using a rotary measuring cup dosing system.

First, salt is manually loaded into the feeding equipment and automatically conveyed into the machine’s storage hopper. For actual production applications, the feeding system can also be connected directly to the salt production line’s discharge outlet, depending on the factory layout and feeding requirements.

Once the salt enters the storage hopper, the rotary measuring cup system measures the material according to the preset quantity. The measured salt is then discharged into the packaging machine.

At the same time, the SK-L420 automatically forms bags from roll film, prints the production date, fills the measured salt, seals and cuts the bags, and outputs the finished packages.

Finally, the finished salt bags are transported away from the bottom of the packaging machine by the finished product conveyor for collection or subsequent handling.

This automatic process helps reduce manual weighing and bagging, improve packaging efficiency, and maintain consistent package quantities.

Automatic Salt Packaging Process

Salt Feeding → Automatic Conveying → Storage Hopper → Rotary Measuring Cup Dosing → Bag Forming → Date Printing → Product Filling → Heat Sealing → Bag Cutting → Finished Bag Conveyor

2. Key Features and Advantages of SK-L420

2.1 Rotary Measuring Cup Dosing System

The SK-L420 uses a rotary measuring cup system for quantitative dispensing of small granular products such as edible salt and granulated sugar.

The measuring cups rotate to complete product measurement and discharge, supporting fast and continuous packaging.

The measuring volume can be adjusted according to the required package weight and product characteristics. Actual package weight and dosing accuracy depend on product density, particle size, flow characteristics, and machine adjustment.

2.2 Servo Double Film Pulling System

The packaging machine adopts a servo-driven double film pulling system to ensure smooth and stable transmission of packaging film.

This helps maintain consistent bag forming, improve packaging appearance, and support continuous machine operation.

2.3 Reliable Pneumatic Sealing System

The machine uses imported-brand pneumatic cylinders to provide stable sealing pressure and clear sealing lines.

The sealing system helps produce secure package seals, reduce the risk of air leakage, and minimize defective bags when the machine is properly adjusted and compatible packaging film is used.

2.4 Multilingual Operating System

The machine is equipped with a multilingual operating system, making operation more convenient for customers in different countries and regions.

Available language configurations can be confirmed according to customer requirements.

2.5 External Film Roll Mounting Structure

The external film roll mounting mechanism makes packaging film replacement more convenient.

Operators can replace film rolls more easily, simplifying routine operation and helping reduce film-changing downtime.

2.6 Fully Automatic Packaging Process

When connected with the feeding and rotary measuring cup systems, the SK-L420 automatically completes the main packaging operations, including:

• Product feeding
• Quantitative measuring
• Bag forming
• Date printing
• Product filling
• Heat sealing
• Bag cutting
• Finished bag output

The integrated system helps reduce manual handling and improve production automation.

2.7 Optional Packaging Functions

According to different product and packaging requirements, the SK-L420 can be configured with optional functions, including:

• Punching Device: Creates holes in the packaging bag for specific packaging requirements.
• Connected Bag Device: Produces connected bags according to the required bag arrangement and machine configuration.
• Air Exhaust Device: Removes part of the air from the bag before sealing.
• Nitrogen Flushing System: Introduces nitrogen into the bag before sealing to help reduce oxygen exposure and support product freshness.

Please confirm the required functions when requesting a quotation so the appropriate configuration can be evaluated.

3. Technical Specifications of SK-L420

Note: Actual packaging speed and dosing accuracy depend on product characteristics, target package weight, bag dimensions, packaging film, and machine adjustment.

4. Suitable Applications

The SK-L420 rotary measuring cup packaging machine is suitable for edible salt and other compatible small granular products.

Salt Products

• Table salt
• Fine edible salt
• Granulated salt
• Other compatible granular salt products

Sugar and Seasoning Products

• Granulated white sugar
• Brown sugar granules
• MSG (monosodium glutamate)
• Chicken seasoning granules
• Other granular seasoning products

Other Small Granular Products

• Compatible food granules
• Small plastic granules
• Other free-flowing granular materials

Different materials have different particle sizes, bulk densities, and flow characteristics. The rotary measuring cup system is suitable for products with relatively consistent bulk density and flow characteristics.

The actual package weight should be confirmed through product testing and machine adjustment.

5. Packaging Bag Types and Film Options

5.1 Back-Seal Bag (Pillow Bag)

A back-seal bag, also known as a pillow bag, is formed by sealing the packaging film longitudinally along the back to create a tube. The machine then fills the product and seals the top and bottom to produce individual packages.

Key features:

• Longitudinal back seal
• Top and bottom heat seals
• Suitable for automatic quantitative filling
• Available in different bag widths and lengths within the machine’s configuration range

5.2 Back-Seal Gusseted Bag

A back-seal gusseted bag features a longitudinal back seal and gussets that allow the bag to expand and provide additional packaging space.

Key features:

• Longitudinal back seal
• Gusseted bag structure
• Additional package space
• Suitable for selected granular products

The exact gusset structure, bag dimensions, and finished appearance should be confirmed using a sample bag or packaging drawing before machine configuration.

5.3 Packaging Film Specifications

The SK-L420 supports the following packaging dimensions:

• Bag width: 80–200 mm
• Bag length: 80–300 mm
• Packaging film width: 180–420 mm
• Maximum film roll diameter: 360 mm
• Film thickness: 0.04–0.08 mm

The machine uses roll film compatible with its forming and heat-sealing system. Film material, barrier properties, printing requirements, and sealing compatibility should be confirmed before ordering.

5.4 Optional Bag Functions

The machine can also be evaluated for optional punching, connected bag production, air exhaust, and nitrogen flushing configurations.

Customers can provide a sample bag, packaging film specifications, or a bag drawing so Soonkpack can evaluate the appropriate forming and sealing configuration.

6. Manufacturing, Testing, and Shipping Process

Soonkpack provides packaging machinery manufacturing and customized configuration services for customers in different industries.

Production Process:

Requirement Confirmation → Machine Configuration → Mechanical Assembly → Electrical Installation → Machine Testing → Packaging Trial → Customer Confirmation

Packing and Shipping Process:

Final Inspection → Machine Cleaning → Protective Packaging → Export Wooden Case Packing → Shipping Arrangement → Global Delivery

Installation guidance, operating instructions, and technical support are available according to the agreed service arrangements.

7. Frequently Asked Questions (FAQ)

Q1. What is the SK-L420 salt packaging machine?

The SK-L420 is an automatic vertical packaging machine equipped with a rotary measuring cup dosing system. It is designed for quantitative packaging of edible salt and other compatible small granular products.

Q2. What package weight is shown in the demonstration video?

The demonstration video shows the SK-L420 packaging 2 kg of edible salt per bag. Other target weights should be evaluated according to the material characteristics and rotary measuring cup configuration.

Q3. How does the rotary measuring cup dosing system work?

The rotary measuring cups measure a preset volume of product and discharge it into the packaging machine. The actual product weight depends on the material’s bulk density, particle size, and flow characteristics.

Q4. Can the machine connect directly to our salt production line?

Yes. The feeding system can be designed to connect with the discharge outlet of your salt production line, subject to the factory layout, outlet height, and material conveying requirements.

Q5. What bag types can the SK-L420 produce?

The machine can be configured for back-seal bags (pillow bags) and back-seal gusseted bags. The final bag structure should be confirmed according to the required bag sample and forming system.

Q6. Can the machine add nitrogen flushing?

Yes. A nitrogen flushing system can be added as an optional configuration. Please inform us of your requirements when requesting a quotation.

Q7. Can the machine produce connected bags or add punching and air exhaust functions?

Yes. Connected bag production, punching, and air exhaust can be evaluated as optional configurations. Please provide your required bag style and packaging method before ordering.

Q8. What is the packaging speed?

The specified packaging speed is 5–80 bags per minute. Actual output depends on the target package weight, product characteristics, bag dimensions, packaging film, and operating conditions.

Q9. Is Soonkpack a factory or a trading company?

Soonkpack is a source manufacturer of packaging machinery with 18 years of factory manufacturing experience. We provide machine design, manufacturing, assembly, testing, and after-sales support.

We welcome customers to visit our factory in Foshan, Guangdong, China.

Factory Address:

Block 5, No. 3 Xiangtai Nan Road, Dawo Village, Danzao Town, Nanhai District, Foshan City, Guangdong Province 528216, China.

Q10. What is the warranty period?

Soonkpack provides a one-year warranty for the complete machine, subject to the agreed warranty terms.

Q11. What should I do if a problem occurs during machine operation?

Our after-sales team will first provide remote assistance through video calls to help identify and troubleshoot the problem. If the issue cannot be resolved remotely, on-site service can be arranged when necessary, subject to the service agreement and location.

8. Contact Soonkpack for a Salt Packaging Solution

To receive a suitable recommendation and quotation, please provide:

• Product: Salt, sugar, MSG, seasoning granules, or other materials
• Target package weight: For example, 2 kg or another required weight
• Bag style: Back-seal bag or back-seal gusseted bag
• Bag dimensions: Width and length
• Optional functions: Nitrogen flushing, air exhaust, punching, or connected bags
• Required production capacity: Bags per minute or bags per hour

Contact Soonkpack Packaging Machine Manufacturer in China for machine details, configuration recommendations, and a quotation.

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