Chongqing Chuke Intelligent Machinery & Equipment Co., Ltd., a certified manufacturer (ISO, CE, FDA, RoHS) of precision laser solutions, has successfully delivered two custom laser anodizing removal systems to a notebook computer component supply chain enterprise based in Tongliang, Chongqing. The customer, having witnessed similar machines deployed at a peer manufacturer's facility, placed an order for two units to serve a major notebook computer brand.
Industry Challenge: Balancing Lightweight Design with Manufacturing Precision
Modern notebook computers pursue increasingly lightweight designs, which places significant constraints on internal component layout and structural integrity. The housing wall thickness of typical notebook computers ranges from just 0.5 to 0.7 millimeters, leaving minimal margin for error during secondary processing operations. For magnesium aluminum alloy casings, the presence of an anodized layer can compromise welding quality, making precise removal of this insulating layer a critical manufacturing requirement.
The customer's application involves A side and C side inner surface cable routing areas of magnesium aluminum alloy housings. These are the precise locations where internal
Cables must pass through and make electrical contact, requiring complete removal of the anodized layer to ensure proper conductivity and reliable welding joints.
A Standard Optical Path with Specialized Thermal Control
The two systems delivered are not all in one multi function machines but rather single optical path conventional models. However, due to the extremely thin wall thickness of the notebook housings, thermal deformation presents a significant risk during laser processing. Any excessive heat input can cause warping, discoloration, or even burn through on the 0.5mm thick material. This seemingly standard application therefore carries highly specialized requirements for thermal management.
To achieve the required anodizing removal effect while protecting the ultra thin substrate from thermal damage, Chongqing Chuke deployed a GZTech high peak power series MOPA fiber laser. This
Laser Source delivers superior peak power performance compared to JPT's M8 series, enabling clean, precise removal of the anodized layer with minimal thermal input.
The high peak power characteristic is critical for anodized layer removal on thin walled magnesium aluminum alloy casings. Traditional nanosecond lasers operating at lower peak powers may require multiple passes or higher thermal input, risking substrate deformation or burn through on sub millimeter thick material. GZTech's high peak power lasers achieve single pass removal with exceptional efficiency, significantly reducing heat accumulation.
Ultra High Speed Scanning: Minimizing Heat Input
Complementing the laser source is a Jiatag ultra high speed scanning galvanometer capable of scan speeds exceeding 25,000 mm/s. This high speed scanning capability ensures that laser energy dwells on any given point for the absolute minimum duration, further reducing heat accumulation and thermal stress on the thin walled housing.
The combination of high peak power pulses and ultra rapid scanning achieves what is known as "cold processing" conditions. The anodized layer is vaporized before significant heat can conduct into the underlying magnesium aluminum alloy substrate, preserving the material's mechanical properties and preventing warpage or discoloration.
Air Assist and Fume Extraction: A Rare but Critical Combination
During the anodizing removal process, debris and particulate matter are generated as the laser vaporizes the anodized layer. To ensure a clean, flat surface suitable for subsequent welding operations, compressed air assist is employed to blow away these particles during processing. This prevents re deposition of debris onto the freshly processed surface, which could otherwise compromise weld quality.
However, airborne particles also present a concern for both the working environment and operator health. To address this, the customer opted for an enclosed cabinet configuration paired with a fume extraction system to actively capture and remove these particles from the workstation. The closed cabinet contains the debris within a controlled space, while the fume extractor creates negative pressure to draw contaminated air through filtration before releasing clean air back into the facility.
The simultaneous use of blowing (air assist) and exhaust (fume extraction) in laser marking applications is relatively rare. This combination is typically reserved for specialized applications such as precious metal
Laser Engraving , where surface cleanliness and environmental control are of paramount importance. For most
Industrial Marking applications, either air assist or passive filtration is considered sufficient. The customer's decision to implement both reflects an exceptional commitment to process quality and workplace safety, and Chuke's engineering team successfully integrated both features into the delivered systems.
Results: Precision Removal on Sub Millimeter Walls
The delivered systems have successfully met all customer requirements, including:
Substrate integrity: No deformation, warping, or heat affected zone damage on 0.5-0.7mm thick housings
Clean removal: Complete elimination of the anodized layer with no residue
Surface quality: Smooth, flat finish suitable for subsequent welding and assembly operations, enabled by effective air assist
Thermal control: No discoloration or burn through despite the ultra thin wall thickness
Environmental safety: Enclosed cabinet with fume extraction protects operator health and maintains a clean workspace
About Chongqing Chuke Intelligent Machinery & Equipment Co., Ltd.
Chongqing Chuke Intelligent Machinery & Equipment Co., Ltd. holds internationally recognized certifications including ISO, CE, FDA, and RoHS. The company specializes in the development and manufacture of
High Precision Marking and laser processing equipment, with core competencies in pneumatic dot peen marking systems, handheld and benchtop fiber laser markers,
Laser Cleaning systems, and custom engineered solutions for anodizing removal and surface processing.
Chuke serves clients across more than 100 countries and regions worldwide, with particular strength in the 3C electronics, automotive parts, motorcycle components, industrial gas, and aerospace sectors. The company's engineering team possesses deep expertise in laser material processing, enabling the development of custom solutions for challenging applications including ultra thin wall processing, selective coating removal, precision thermal management, and integrated air assist/fume extraction configurations for demanding environments.
