Laser Technology 
What is Degating?
Degating / cutting of injection sprues is a critical process in the production of injection molded plastic components. It involves the precise removal of feed channels and injection points that remain attached to molded parts. This step is essential in industries like automotive and electronics, where precision, efficiency, surface quality, repeatability, and automation are crucial.
During injection molding, molten plastic flows into the mold through channels called sprues or gates. Once the part solidifies, these sprues must be removed carefully to prevent burrs, warping, residual stress, or surface damage. Poorly executed degating can compromise both the function and appearance of the part, making advanced solutions like laser cutting essential for consistent, high-quality results.
Traditional Methods of Degating
Traditional methods, whether manual, pneumatic, mechanical, thermal, or ultrasonic, have limitations that affect efficiency, quality, and consistency:
As automation advances and production demands increase, handling complex part geometries, particularly in the automotive sector, requires more precise and reliable degating solutions. In this context, laser cutting has emerged as a modern, non-contact technology that is easily integrated into production lines while meeting industrial precision standards.
Advantages of Laser Cutting for Degating
Laser cutting has become one of the most significant advancements in the degating process for injection-molded plastic components. It introduces a fully non-contact, digitally controlled method that delivers exceptional cutting speed and repeatability. The technology integrates seamlessly with automation systems and adapts effortlessly to the demanding requirements of modern industrial production.
Laser systems allow precise adjustment of speed, power, frequency, vector path, and focus based on part geometry and surface. This ensures clean, burr-free cuts and tight tolerances, even for complex geometries, with full repeatability across production batches.
With no physical contact, laser cutting eliminates the risk of mechanical deformation, residual stress, or surface damage. This is essential for technical plastics, thin parts, or high-value components where imperfections can compromise performance and appearance.
Laser systems are fully compatible with robotic arms and Cartesian axes, enabling compact, intelligent production cells. They support continuous operation at high throughput, with minimal maintenance and no tool wear, significantly reducing production downtime.
A single laser system can handle different polymers, part thicknesses, and geometries with simple software adjustments. Changing parts or models requires only reprogramming, without replacing tools. Compatibility with CAD/CAM software and vision systems enables cutting of 3D parts or complex paths while maintaining full quality control.
Laser cutting is a dry process that requires no oils, fluids, chemicals, inks, or consumables. Precision reduces material waste, and the process does not contaminate parts, facilitating recycling and reintegration into the production cycle. This contributes to a circular economy and reduces environmental impact.
Although initial investment may be higher, the total cost over the system’s lifetime is lower than traditional methods. Reduced maintenance, higher productivity, lower defect rates, and no consumables make laser cutting a highly cost-effective solution in the medium and long term.
Customized Solutions: When the Laser Adapts to Your Production Process
While standard laser solutions and OEM systems exist for integration into injection cells, many projects require fully customized setups. Each part may have unique geometries, hard-to-reach cutting areas, high production rates, or require full integration with existing lines.
Portlaser specializes in developing tailored laser solutions from the ground up, fully adapted to each client’s project. Solutions range from compact models for integration into single injection cells to multi-head laser systems capable of cutting multiple parts simultaneously.
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