Table of Contents
- Why the Correct Ratio Is Important
- Fixed Ratio Dispensing Systems
- Why Manufacturers Choose Fixed Ratio Systems
- Variable Ratio Dispensing Systems
- Why Manufacturers Choose Variable Ratio Systems
- Fixed Ratio Vs. Variable Ratio Systems
- How to Decide Which Meter Mix System Is Right for You
- FAQs
Choosing the right dispensing system for two-component materials is critical for manufacturers. The wrong mix ratio can negatively affect the product’s performance and ultimately the business’s bottom line.
A bulk system can apply two-component materials accurately and efficiently. But do you need a fixed ratio or a variable ratio dispensing system? Our team explains how each system works and where each system performs best.
Why the Correct Ratio Is Important in Dispensing
The correct ratio is critical in dispensing two-component materials because it directly impacts how the material performs after application. Adhesives, sealants, and other reactive materials are formulated to cure, bond, and perform only when mixed at the manufacturer-specified ratio.
If the mix ratio is off, even slightly, the results can be detrimental. Manufacturers can see incomplete curing, weak bonds, cosmetic defects, or bond failure. These issues can quickly add up in costs. Consequently, the correct ratio can help reduce scrap, rework, and warranty issues while ensuring consistent quality across production runs.
The best way to ensure you have the correct mix ratio is to use the right equipment. A bulk meter mix dispensing system can improve accuracy, efficiency, and precision.
What Is a Fixed Ratio Dispensing System?
A fixed ratio dispensing system is designed to dispense two-component materials at a predetermined mix ratio. The ratio is set mechanically through pump sizing or drive configuration and remains constant throughout operation. Once configured, the fixed ratio dispensing equipment can deliver highly repeatable results for that particular ratio.
Fixed ratio dispensing equipment is generally best used in production environments where the same material formulation and ratio are always run.
The key benefits of fixed ratio dispensing systems over variable ratio systems include:
- Simple operation and setup
- Consistent ratio control for long production runs
- Reliable performance for continuous bead or shot dispensing
Why Manufacturers Choose Fixed Ratio Systems
For a lot of manufacturers, changing the ratio of their dispensing is unnecessary because they use the same material and the same ratio for the same application each time. Even if the specific material changes, it is likely that the new, comparable material will be the same ratio. In these cases, a fixed ratio dispensing system is perfectly fine for their needs.
Compared to variable ratio dispensing systems, fixed ratio dispensing systems are also simple in design and use. They can reduce unnecessary complexities for operation as well as training for staff.
Because the ratio never changes during operation, fixed ratio systems are well suited for manufacturers that prioritize throughput and simplicity rather than flexibility. Fixed ratio dispensing systems are commonly used in applications such as structural bonding, gasketing, and potting, where the formulation typically remains unchanged.
What Is a Variable Ratio Dispensing System?
A variable ratio adhesive dispensing system is designed to allow operators to easily adjust the mix ratio between materials. Rather than having to change pumps or hardware to adjust the mix ratio, variable ratio systems typically use a controller or a human-machine interface to allow operators to change the ratio or fine-tune other output parameters throughout production.
Variable ratio dispensing equipment is designed for production environments where needs frequently change. Operators can more easily switch between multiple materials, formulations, or product variations on the same line.
The key benefits of variable ratio dispensing systems over fixed ratio systems include:
- The ability to run multiple ratios on one system
- Reduced downtime for ratio changes
- Greater control over material properties
Why Manufacturers Choose Variable Ratio Systems
When manufacturers are looking for flexibility in their dispensing, they will often turn to variable fluid dispensing systems over fixed fluid dispensing systems. These systems trade mechanical simplicity for versatility.
Compared to fixed ratio dispensing meter mix systems, variable ratio dispensers allow for more variability and operator control. They can easily be adjusted to meet changing needs in production. For manufacturers producing multiple SKUs or custom formulations, this flexibility can significantly improve efficiency and reduce capital equipment needs.
Variable ratio dispensing systems are often used in electronics manufacturing, thermal management material dispensing, and contract manufacturing environments where the ability to tune ratios adds measurable value.
Fixed Ratio Vs. Variable Ratio Meter Mix Dispensing Systems
To clearly show how these systems differ, our team created a chart to compare fixed ratio meter mix systems and variable ratio meter mix systems.
| Feature | Fixed Ratio Dispensing Systems | Variable Ratio Dispensing Systems |
|---|---|---|
| Ratio control | One set ratio | Adjustable ratios |
| Ratio changes | Requires mechanical changes | Software or control adjustment |
| System complexity | Lower | Higher |
| Ideal production style | Long, consistent runs | Mixed or changing production needs |
How to Decide Which Meter Mix System Is Right for You
Selecting between fixed and variable ratio meter mix dispensing equipment becomes easier when you understand your production needs. Our team typically recommends considering the following.
1. Identify how often your mix ratio changes.
If you typically only run one formulation, a fixed ratio system is usually sufficient. If ratios change more regularly, consider a variable ratio metering and mixing machine.
2. Evaluate production volume and run length.
High-volume, continuous production favors fixed ratio adhesive dispensers over variable ratio adhesive dispensing systems. Variable ratio systems are better for shorter runs with more frequent changeovers.
3. Assess your operators’ skills and training.
Compared to variable ratio dispensers, fixed ratio systems are simpler to operate and require less training. On the other hand, variable ratio systems offer greater control.
4. Weigh your budget versus your long-term efficiency needs.
Another important consideration between fixed ratio and variable ratio meter mix systems is cost. Fixed ratio meter mix systems often cost less initially, but variable ratio systems may deliver long-term savings.
5. Consider your future production needs
If you expect to introduce new products or formulations, variable ratio systems can help avoid additional equipment purchases later.
These considerations can help you better understand your real production needs and align those needs with the right equipment.
Get a Personal Recommendation
Both fixed ratio and variable ratio dispensing systems can increase productivity and efficiency in manufacturing, but you will get better results when you choose the right system for your needs.
We offer a wide selection of meter mix dispensing systems, but if you have questions or want more guidance on your selection, you can speak with one of our dispensing experts.
