How to solve a catheter burr problem?

Here are some suggestions for solving catheter burr problems:

1. Select key parameters
Determine which parameters may have an effect on burr. Typical injection molding process parameters include:

– Push pressure
– Push speed
– Holding time and pressure
– Heating temperature
– Mold temperature
– Cooling time and temperature

2. Single-variable tests
In the beginning, a single-variable test can be used to see how each parameter change affects the results. In other words, change one parameter at a time while keeping the other parameters constant and observe how the change in this parameter affects the formation of burrs.

3. Parameter Adjustment
Adjust the parameters according to the test results:
– Reduce the pushing pressure : Reduce the pressure inside the mold to reduce the chance of the material squeezing into the separation surface of the mold.
– Adjust the speed : Try to reduce the push speed to reduce the rate at which the material pushes into the mold and forms a burr on the separation surface.
– Adjust Holding Phase : Optimize the holding time and pressure to ensure that the plastic fully fills the mold cavity without creating excessive internal pressure.
– Adjustment of the mold temperature : Ensure that the mold temperature is uniform and appropriate to avoid burrs caused by uneven heat.

4. Multi-parameter Optimization
After single-variable testing has provided initial understanding, multi-parameter optimization can be used. For example, a combination of injection speed and mold temperature adjustments to find the best process window.

5. Record and analyze data
Keep detailed records of the results of each test and use statistical analysis software or tools to analyze the data to better understand how each parameter affects molding quality.

6. Iterate the cycle
Iterative optimization based on test results may require multiple rounds of experiments to find the best configuration.

7. Confirmation test
After finding the parameter setting that solves the problem, confirmatory tests are conducted to verify the repeatability and stability of the results.

8. Long-term monitoring
Even if a solution is found, the process needs to be monitored over time to ensure that the solution is effective and that it is adjusted in time to cope with any changes.

When conducting process optimization tests, it is important to remember to vary one parameter while keeping the others constant so that the effect of each variable on the results can be clearly seen. It is also vital to maintain the stability and repeatability of the production process.

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