Addressing B Pump Crystallization in Polyurethane Dispensing: An Innovative Solution

Addressing B Pump Crystallization in Polyurethane Dispensing: An Innovative Solution

Polyurethane dispensing systems are critical in various industries, offering versatility and performance in adhesive applications. However, a common challenge encountered with these systems, particularly with the B pump, is internal crystallization. This issue primarily arises from the polyol component in polyurethane hardeners, which is prone to crystallization when exposed to low temperatures and humid air. At Guangzhou Daheng Automation Equipment Co., Ltd. (D&H), we have developed an innovative solution to address this crystallization issue, significantly enhancing the longevity and efficiency of our dispensing systems.

Understanding the Crystallization Challenge

The crystallization of hardeners within the B pump poses significant operational challenges. Polyol components in polyurethane hardeners crystallize under specific environmental conditions, leading to blockages and reduced efficiency in the dispensing process. This crystallization not only hampers the fluid flow but also increases the frequency of maintenance, thereby escalating operational costs and downtime.

Innovative Sealing Structure: A Solution to Crystallization

To combat the crystallization issue, D&H has improved the sealing structure of our plunger pump. The core of this innovation lies in the integration of a flume connected to a DOP (Dioctyl Phthalate) oil cup. This flume system serves a dual purpose:

1. Creating a Protective Liquid Membrane: The flume ensures a continuous layer of DOP oil forms around the plunger pump. This liquid membrane acts as a barrier, isolating the hardener from moisture and preventing the formation of crystalline layers. By covering the hardener part with this protective membrane, we can significantly reduce the likelihood of crystallization.

2. Extending Maintenance Cycles: The primary benefit of this improved sealing structure is the extension of the machine's maintenance cycle. By minimizing crystallization, the interval between necessary maintenance activities can be extended from one month to several months. This not only reduces downtime but also lowers maintenance costs and enhances overall productivity.

Maintenance Best Practices for Prolonged Efficiency

While our innovative sealing structure addresses the core issue of crystallization, proper maintenance practices are equally vital to ensure the long-term efficiency and durability of the B pump. Based on our extensive experience, we recommend the following maintenance steps:

1. Daily Cleaning and Lubrication: It is crucial to keep the protective cover open when the equipment is not in use. At the end of each workday, the plunger rod should be wiped clean with a suitable cleaning solvent to remove any residual hardener. After cleaning, applying grease to the plunger rod will further protect against crystallization and wear.

2. Regular Inspection of DOP Oil Levels: Ensuring that there is an adequate amount of DOP oil in the B pump is a necessary daily operation. Regular checks and refills of the DOP oil will maintain the integrity of the protective liquid membrane, thereby preventing moisture ingress and crystallization.

3. Understanding Hardener Properties: Different polyurethane adhesives have varying crystallization properties. Operators should be aware of the specific characteristics of the hardeners they are using and adjust maintenance routines accordingly. Monitoring and adapting to these properties will help in preemptively addressing potential crystallization issues.

Conclusion

The crystallization of polyurethane hardeners within the B pump is a significant challenge that can impact the efficiency and lifespan of dispensing systems. At D&H, our innovative sealing structure with a flume connected to a DOP oil cup offers a robust solution, creating a protective liquid membrane that isolates moisture and prevents crystallization. Combined with diligent maintenance practices, this solution extends the maintenance cycle and enhances the overall performance of our equipment. By adopting these strategies, industries can achieve greater operational efficiency, reduced downtime, and prolonged equipment lifespan, ensuring sustained productivity and cost-effectiveness in their adhesive applications.