At Ruicheng, we understand the importance of continuous professional development and the need to stay ahead of industry challenges. This commitment to excellence is reflected in our comprehensive training programs designed for our team and partners. One of our key training modules focuses on identifying and analyzing common surface issues in injection molded parts.
Training Overview
Our “Common Surface Issues in Plastic Parts” training program aims to enhance the technical skills of our employees and partners. This training is crucial for ensuring the high quality of our products and maintaining our reputation as industry leaders. The session will be conducted by our senior engineer, Mr. Chen.
Main Training Content
Our training content is divided into two parts: one focusing on surface defects (which do not require the use of instruments) and the other on dimensional and structural defects (which require the use of instruments).
Part One: Surface Defects Identification and Cause Analysis
1.Sink Marks:
Phenomenon: Small depressions on the surface of the molded part.
Cause: Uneven cooling, insufficient packing, or inadequate cooling of thick sections.
2.Flow Lines:
Phenomenon: Streaks, patterns, or lines on the surface of the part.
Cause: Improper gate location, flow imbalances, or inappropriate injection speed.
Phenomenon: Lines formed when two flow fronts meet but do not fully bond.
Cause: Low mold temperature, insufficient material flow, or poor venting.
4.Blush Marks:
Phenomenon: Glossy areas or discoloration near gates or on the surface.
Cause: Excessive injection speed, high melt temperature, or poor mold design.
5.Jetting:
Phenomenon: Lines or ripples caused by the high-speed injection of molten plastic.
Cause: High injection velocity, narrow gates, or improper nozzle design.
6.Bubbles and Voids:
Phenomenon: Air or gas pockets trapped within or on the surface of the molded part.
Cause: Moisture in the material, high melt temperature, or poor venting.
Part Two: Dimensional and Structural Defects Identification and Cause Analysis
1.Dimensional Variations:
Phenomenon: Actual dimensions differ from the design dimensions.
Cause: Mold manufacturing errors, incorrect material shrinkage rates, or inappropriate processing parameters.
Tools: Vernier calipers, micrometers.
2.Deformation and Warping:
Phenomenon: The molded part deviates from the design shape, exhibiting bending or twisting.
Cause: Uneven cooling, inconsistent injection pressure, or poor mold design.
Tools: Ruler, flatness measurement tools.
3.Uneven Wall Thickness:
Phenomenon: Inconsistent wall thickness in the molded part, leading to localized weakness.
Cause: Mold design defects or inappropriate injection molding parameters.
Tools: Ultrasonic thickness gauge.
Phenomenon: The molded part is prone to cracking or breaking during use.
Cause: Rapid cooling or inherent material stresses.
Tools: Stress tester.
Conclusion
Our training program on identifying and analyzing common surface issues in injection molded parts enhances the knowledge and skills of our team, ensuring the production of high-quality products. Understanding the root causes and implementing effective solutions enables us to consistently provide superior plastic products to our clients.
Through continuous learning and improvement, Ruicheng remains committed to excellence in the injection molding industry. If you have any questions about our training programs or would like to learn more about our services, please feel free to contact us.
