Can One Salt Packaging Machine Pack Both 500g and 2kg Bags?
For salt manufacturers and food processing factories, producing different package sizes is a common requirement. Some customers need 500g salt bags for retail sales, while others require 2kg bags for supermarkets, wholesale distribution, or household use.
Can one automatic salt packaging machine handle both 500g and 2kg packaging?
Yes. The Soonkpack SK-L420 salt packaging machine can be configured to pack both 500g and 2kg edible salt bags using two different sets of rotary measuring cups. By changing the measuring cup set and adjusting the packaging parameters, the same machine can switch between these two target package weights.
In this article, we explain how the SK-L420 handles different salt package weights, what needs to be changed when switching between 500g and 2kg, and how to choose the correct bag-forming components.
1. How Does the SK-L420 Pack Both 500g and 2kg Salt?
The SK-L420 uses a rotary measuring cup dosing system to measure and dispense salt before packaging.
Instead of using one fixed measuring cup for both weights, Soonkpack configures two separate sets of measuring cups:
- 500g packaging: Uses one set of rotary measuring cups designed for the 500g target quantity.
- 2kg packaging: Uses another set of rotary measuring cups designed for the 2kg target quantity.
When changing between the two package weights, operators replace the corresponding measuring cup set and adjust the machine according to the new packaging requirements.
The rotary measuring cup system measures salt by volume. The actual filling weight depends on salt particle size, bulk density, moisture, and flow characteristics. Therefore, each measuring cup set should be tested and adjusted with the customer’s actual salt material to achieve the required target weight.
This configuration allows one SK-L420 packaging machine to serve two different packaging weight requirements without purchasing two separate complete machines.
2. What Needs to Be Changed When Switching Between 500g and 2kg?
When changing from 500g to 2kg salt packaging, or from 2kg back to 500g, the required adjustments mainly involve the dosing system and bag-forming configuration.
2.1 Change the Rotary Measuring Cup Set
The most important difference is the dosing volume.
The 500g and 2kg packages require different measuring volumes, so the SK-L420 uses two separate sets of rotary measuring cups.
Switching procedure:
- Stop the machine safely.
- Remove the currently installed measuring cup set.
- Install the measuring cup set for the new target weight.
- Adjust the dosing parameters and test the filling quantity.
- Confirm the actual package weight before starting continuous production.
Using separate measuring cup sets makes switching between the two packaging weights more convenient and helps maintain consistent dosing after proper adjustment.
2.2 If the Bag Width Stays the Same: Adjust the Bag Length on the Touchscreen
If the 500g and 2kg salt bags have the same bag width, there is no need to replace the bag-forming unit just because the package weight changes.
For example:
- 500g salt bag: Same bag width, shorter bag length.
- 2kg salt bag: Same bag width, longer bag length.
In this situation, operators can change the bag length directly through the touchscreen control system.
The machine adjusts the film feeding length according to the new parameter, allowing the package to become longer while retaining the same bag width.
This is a convenient way to switch between different package sizes while reducing changeover work.
2.3 If the Bag Width Changes: Replace the Forming Collar
If the 500g and 2kg salt bags require different bag widths, the corresponding forming collar (bag former) needs to be replaced.
The forming collar determines the width and shape of the bag during the film-forming process.
For example:
- 500g salt: Narrower bag width.
- 2kg salt: Wider bag width.
When the required bag width changes, operators need to install the corresponding forming collar and adjust the machine settings.
The final forming components should be selected according to the required bag dimensions and packaging structure.
3. Comparison: 500g vs. 2kg Salt Packaging
| Packaging Item | 500g Salt Bag | 2kg Salt Bag |
|---|---|---|
| Target Package Weight | 500g | 2kg |
| Dosing System | Rotary Measuring Cup | Rotary Measuring Cup |
| Measuring Cup Set | 500g Set | 2kg Set |
| Bag Width | According to requirement | According to requirement |
| Bag Length | Adjust on touchscreen | Adjust on touchscreen |
| Forming Collar | Same if bag width is unchanged | Replace if bag width changes |
| Packaging Machine | SK-L420 | SK-L420 |
The main point is that the SK-L420 can use the same packaging machine for both applications. The measuring cup set is changed according to the target weight, while the bag-forming components depend on the required bag width.
4. Why Choose One SK-L420 for Different Salt Package Weights?
For manufacturers producing multiple package sizes, using one configurable packaging machine can provide several practical advantages.
One Machine for Two Packaging Weights
The SK-L420 can handle both 500g and 2kg salt packaging through two dedicated measuring cup sets, reducing the need to purchase a separate complete packaging machine for each weight.
Convenient Weight Changeover
Operators can change the measuring cup set according to the target weight. When the bag width remains the same, the bag length can be adjusted directly through the touchscreen.
Flexible Bag Dimensions
Different bag lengths can be configured through the control system. If a different bag width is required, the corresponding forming collar can be replaced.
Reduced Equipment Investment
For factories producing both 500g and 2kg salt packages, one SK-L420 with the appropriate interchangeable components can be a practical equipment investment.
Automatic Packaging Operation
The machine automatically completes bag forming, date printing, filling, heat sealing, cutting, and finished bag output, helping reduce repetitive manual packaging work.
5. What Information Should You Provide Before Ordering?
To configure the SK-L420 for both 500g and 2kg salt packaging, please provide the following information:
- Product: Fine salt, table salt, granulated salt, or other salt products.
- Target Weights: 500g and 2kg.
- Bag Width: Required width for each package size.
- Bag Length: Required length for the 500g and 2kg bags.
- Bag Style: Back-seal bag or back-seal gusseted bag.
- Production Capacity: Expected bags per minute or bags per hour.
If the two bag sizes have the same width, the machine can retain the same forming collar and adjust the bag length through the touchscreen. If the widths are different, the corresponding forming collar should be prepared.
Our team can evaluate your bag dimensions and salt samples to recommend the appropriate measuring cup sets and machine configuration.
6. Frequently Asked Questions
Q1. Can one SK-L420 machine pack both 500g and 2kg salt?
Yes. The SK-L420 can be configured with two separate rotary measuring cup sets, one for 500g and another for 2kg salt packaging.
Q2. Do I need to buy two complete packaging machines?
No. One SK-L420 can be used for both packaging weights with the corresponding measuring cup sets and suitable bag-forming components.
Q3. Do I need to change the forming collar when switching from 500g to 2kg?
It depends on the bag width. If both bags have the same width, the forming collar can remain unchanged. If the bag width changes, the corresponding forming collar needs to be replaced.
Q4. If the bag width is the same, how do I change from 500g to 2kg?
After replacing the measuring cup set, operators can adjust the bag length directly through the touchscreen control system. The machine can then produce longer bags according to the new settings.
Q5. Why does the machine need two different measuring cup sets?
The 500g and 2kg target weights require different dosing volumes. Separate measuring cup sets are prepared for each target weight and adjusted according to the actual salt density and flow characteristics.
Q6. Can the SK-L420 pack other granular products?
Yes. The machine can also be evaluated for compatible products such as granulated sugar, MSG, chicken seasoning granules, and other small granular materials. The measuring cup configuration should be selected according to the product characteristics.
7. Contact Soonkpack for Your Salt Packaging Solution
Looking for one automatic salt packaging machine that can handle both 500g and 2kg bags?
The Soonkpack SK-L420 rotary measuring cup salt packaging machine can be configured with two separate measuring cup sets to meet different target package weights.
Whether your two bag sizes have the same width or require different forming collars, our team can help evaluate the appropriate machine configuration.
Please send us your salt sample, target package weights, and bag dimensions.
Contact Soonkpack Packaging Machine Manufacturer in China to discuss your 500g and 2kg salt packaging requirements and request a customized quotation.
