Quick Answer
Common resin conveying problems include clogged filters, air leaks, excessive conveying velocity, material fines and angel hair, vacuum receiver issues, material source connection problems, and vacuum pump performance concerns. Identifying and addressing these challenges can help improve material flow, reduce downtime, increase system efficiency, and support consistent processing performance.
Resin conveying systems are essential for moving material efficiently throughout a plastics processing facility. However, even well-designed systems can experience performance issues that negatively impact productivity, increase maintenance requirements, and contribute to unnecessary downtime.
Understanding the most common conveying challenges can help processors identify issues earlier, improve system performance, and maintain consistent material flow. Below are seven common resin conveying problems and practical solutions that can help keep your material handling system operating efficiently.
1. Clogged or Dirty Filters
Filtration plays a critical role in the performance of any resin conveying system. Over time, filters can become clogged with dust, fines, and other contaminants that restrict airflow and reduce conveying efficiency.
When filters become dirty, vacuum pumps must work harder to move material, resulting in higher energy consumption and reduced system performance.
How to solve it:
- Establish a routine filter inspection schedule.
- Replace worn or damaged filter media.
- Verify filters are properly sized for the application.
- Consider specialized filter media when handling materials that generate excessive dust or fines.
- If the system includes automatic filter cleaning, regularly inspect all cleaning components to ensure proper operation. Verify that air pressure, filter pulse settings, and cleaning frequency are properly adjusted for the application.
Regularly cleaning or replacing filters helps maintain proper airflow, improve conveying performance, and reduce unnecessary strain on system components.
2. Air Leaks in the Conveying System
Even small air leaks can have a significant impact on conveying performance. Leaks allow unintended air to enter or escape the system, reducing vacuum efficiency and making it more difficult to convey material effectively.
Common leak locations include:
- Flexible hose connections
- Pipe joints
- Worn piping components
- Gaskets
- Receiver seals
- Filter housings
How to solve it:
- Regularly inspect hoses, gaskets, and seals.
- Replace worn components as needed.
- Verify clamps and connections are properly secured.
- Include leak inspections as part of preventive maintenance programs.
Addressing leaks can improve conveying efficiency while reducing energy consumption.
3. Excessive Conveying Velocity
Increasing conveying speed may seem like a way to move material more quickly, but excessive velocity often creates additional problems.
When resin travels through a conveying system at high speeds, material degradation, component wear, and excessive dust generation can occur. Certain materials may also generate streamers or angel hair that create additional maintenance challenges.
How to solve it:
- Evaluate conveying line velocity.
- Match conveying parameters to the material being processed.
- Review conveying line sizing, airflow, and pump settings.
- Optimize air-to-material ratios whenever possible.
The goal is to move material efficiently while minimizing unnecessary component wear and material degradation.
4. Material Fines and Angel Hair
Material fines, streamers, and angel hair can create recurring conveying issues throughout a facility. These byproducts often accumulate in filters, receivers, and conveying lines, reducing efficiency and increasing maintenance requirements.
Materials exposed to excessive friction, heat, or conveying velocity are more likely to experience these issues.
How to solve it:
- Reduce conveying velocity when appropriate.
- Evaluate piping layouts and eliminate unnecessary bends, flexible hose sections, or flow restrictions wherever possible.
- Minimize flexible hose lengths and eliminate unnecessary loops whenever possible.
- Inspect conveying lines for areas where material degradation may be occurring.
- Consider specialized conveying components designed to reduce material wear.
Preventing fines and angel hair can improve overall system reliability and reduce maintenance frequency.
5. Vacuum Receiver Performance Issues
Vacuum receivers are responsible for separating conveyed material from the airflow and delivering it to processing equipment. When receivers are not functioning properly, material flow can become inconsistent and production interruptions may occur.
Common symptoms include:
- Poor loading performance
- Excessive load times
- Inability to keep up with process rate
- Inconsistent receiver cycling
How to solve it:
- Verify that filters are clean.
- Inspect gaskets and seals for signs of wear.
- Confirm demand switches are functioning properly.
- Verify discharge assemblies are operating correctly.
- Monitor receiver loading and idle times for unusual changes and adjust settings as needed.
- Ensure the receiver type is appropriate for the material being conveyed.
Routine inspections can help identify developing issues before they impact production.
6. Improper Material Source Connections
Sometimes conveying issues are not caused by equipment failures but by material pickup problems.
Improper source connections, material pickup issues, line restrictions, or poorly configured take-off points can disrupt material flow and reduce conveying efficiency.
How to solve it:
- Verify source-to-destination connections.
- Inspect pickup devices and material wands to ensure proper material flow.
- Ensure material sources allow smooth material flow.
- Evaluate take-off points for restrictions or flow interruptions and make adjustments as needed.
Simple adjustments at the material source can often produce significant improvements in system performance. Selecting the appropriate material pickup device for the application can further enhance conveying efficiency and system reliability.
7. Vacuum Pump Maintenance Problems
The vacuum pump is one of the most important components in a resin conveying system. If pump performance declines, the entire conveying system can suffer.
Poorly maintained pumps may experience reduced capacity, increased energy consumption, and unplanned downtime.
How to solve it:
- Follow recommended maintenance schedules.
- Inspect belts, bearings, and wear components regularly.
- Monitor vacuum levels and system performance.
- Verify proper lubrication and oil levels where applicable.
- Track operating trends to identify performance changes early.
A well-maintained vacuum pump helps support reliable material conveying and long-term system efficiency.
Optimize Your Resin Conveying System with AEC
Many resin conveying problems can be prevented through proper equipment selection, system design, and routine maintenance. Whether you’re addressing filtration challenges, reducing material degradation, improving receiver performance, or optimizing overall conveying efficiency, having the right material handling solution can make a significant difference.
AEC offers a comprehensive range of resin conveying solutions, including vacuum loaders, receivers, central conveying systems, vacuum pump technologies, and intelligent controls designed to support reliable material handling throughout the plastics processing operation.
With decades of experience helping processors improve material flow and system performance, AEC can help identify solutions that reduce downtime, improve efficiency, and support long-term operational success.
