Soy Sauce Cup Filling Machines

Our automatic soy sauce cup filling machines are designed for filling soy sauce into pre-made plastic portion cups for takeaway, foodservice and food delivery applications. Although soy sauce is a free-flowing liquid, it presents several filling challenges that differ from many other low-viscosity products.

Due to its relatively high protein content, soy sauce can generate significant foam during the filling process. Once formed, the foam often remains on the product surface for an extended period rather than collapsing immediately. This behaviour should be considered when designing the filling process, as excessive turbulence during dosing and unnecessary product movement before sealing can increase foam formation.

Selecting the right soy sauce cup filling machine involves more than matching the product’s low viscosity. Soy sauce is typically packed in small portion cups for takeaway, foodservice and meal delivery applications, where accurate dosing, reliable sealing and consistent production performance are essential. The filling system and overall machine configuration should therefore be selected according to the product behaviour, packaging format and production requirements.

Engineering insights

Considerations for Filling Soy Sauce

Foam Control During Filling

Due to its relatively high protein content, soy sauce can generate significant foam during the dosing process. Depending on the product formulation and filling conditions, the foam may remain on the product surface for an extended period after filling. Foam generation is primarily influenced by the level of turbulence created as the product passes through the filling system.

To minimise foam formation, the filling process should maintain stable product flow throughout the dosing cycle while limiting unnecessary air entrainment. Filling nozzle geometry, product flow characteristics and dosing parameters should be selected according to the product properties, required fill volume and production speed.

Optimise product flow to minimise turbulence during dosing
Reduce foam generation by limiting unnecessary air entrainment
Optimise filling parameters using the actual product
Select the filling nozzle according to the product characteristics

Splash Control During Filling and Cup Transfer

Due to its low viscosity, soy sauce can splash both during filling and while the filled portion cups are transferred between machine stations. During dosing, excessive product velocity or an excessive distance between the filling nozzle and the product surface may disturb the liquid inside the cup, increasing the risk of splashing. After filling, rapid acceleration or deceleration of the indexing system may cause further product movement before sealing.

To minimise splashing, the filling process should maintain controlled product flow throughout the dosing cycle. The distance between the filling nozzle and the product surface should also be considered, particularly when filling small portion cups. During cup transfer, smooth indexing motion helps minimise unnecessary product movement before the sealing station.

Control product flow during filling
Minimise the distance between the filling nozzle and the product surface where appropriate
Minimise product movement during machine indexing
Configure filling and indexing parameters according to the fill volume, cup geometry and production speed

Drip-Free Dosing

Because soy sauce is a low-viscosity product, the dosing system should provide positive product cut-off at the end of each filling cycle. Uncontrolled dripping may affect filling accuracy, increase the risk of product contamination on the cup sealing area, compromise seal integrity and reduce the appearance of the finished package.

The required cut-off performance should therefore be considered when selecting the filling system. Product contact components should also be manufactured from stainless steel grades suitable for handling high salt-content food products.

Prevent product dripping after dosing
Maintain accurate and repeatable fill volumes
Select a dosing system suitable for low-viscosity products
Use stainless steel grades suitable for salt-containing food products

Machine Range

Our Soy Sauce Cup Filling Machines

Semi-automatic cup filling and sealing machine for pre-made plastic cups and containers, ensuring accurate filling and secure sealing for dairy and food applications.

Equipment Selection

Recommended Machine Configuration

Standard Machine Configuration

Soy sauce is typically filled into small pre-made plastic portion cups for takeaway and foodservice applications. The final machine configuration should be selected according to the product characteristics, packaging format, required production capacity and packaging specification.

Automatic cup feeding
Automatic filling
Automatic pre-cut lid placement and heat sealing
Automatic finished cup discharge to an outfeed conveyor

Recommended Machine Modules

Most soy sauce applications are supplied with pre-cut lid placement as standard. Where required, the machine can also be configured with additional modules to meet specific packaging and hygiene requirements.

Roll-fed film sealing system (optional)
UV-C treatment of the inner cup surface
Integrated date coding systems for batch and expiry information

Dosing System Selection

Despite its low viscosity, soy sauce is typically filled using a volumetric piston dosing system, providing accurate and repeatable fill volumes for small portion cups. Depending on the application, the filling system may incorporate anti-drip filling nozzles to provide positive product cut-off at the end of each dosing cycle. Cup lifting or descending filling nozzles may also be incorporated to reduce the filling height and improve filling stability.

The final filling nozzle geometry should be selected according to the package format, fill volume, product characteristics and required production performance.

Volumetric piston filling system
Anti-drip filling nozzles
Cup lifting or descending filling nozzles
Filling and bypass valve design selected accordingly

Ultra-Clean Design

The required hygiene level depends on the production process, filling environment and intended shelf life. Standard hygienic machine construction is suitable for many soy sauce applications, while products requiring enhanced hygiene protection can be produced on machines configured with additional Ultra-Clean features.

UV-C treatment of cups and lids
Laminar flow box with HEPA filtration
Aseptic diaphragm valves
Optional dual-sided piston cleaning during CIP

Packaging Examples

Typical Soy Sauce Portion Cup Packaging

Soy sauce is typically packed in small pre-made plastic portion cups for takeaway, foodservice and condiment portions. The packaging format depends on the required fill volume, lid type and intended method of distribution. The examples below illustrate some of the packaging formats commonly used for soy sauce.

Get in touch

Planning a Soy Sauce Cup Filling Project?

Every soy sauce filling project has its own packaging and production requirements. Product characteristics, portion size, packaging format and required output all influence the final machine configuration. Tell us about your product and production requirements, and we’ll help specify the most suitable cup filling solution for your application.