Embossed small size copper strip rolling technologyIt is a combination of precision rolling and surface microstructure forming technology and is widely used inReflective copper tape,Light-catching copper tape, electromagnetic shielding materials, decorative copper tape, functional conductive copper tape and other high-end manufacturing fieldsIts technical threshold is higher than that of ordinary flat copper strips, involving the coordinated optimization of multiple links such as equipment, molds, and process control.
1. Analysis of technical difficulties
1. Small size is difficult to control
- Small-sized copper strips (such as 0.05-0.3mm thickness and 2-8mm width) are prone to edge warping, deviation, uneven embossing, etc.
- The dimensional accuracy tolerance must be controlled to ±0.01mm, especially after embossing, which is more prone to errors due to elastic rebound.
2. High embossing pattern precision requirements
- The embossing pattern is very deep (usually 3-10μm), which requires high processing precision of the roller mold;
- Any axis deviation or pattern roller installation error may cause pattern deformation and misalignment of repeated patterns.
3. Copper ductility and springback control
- Small-sized copper strips have large springback after rolling. If the ratio of springback to plastic deformation is not well controlled, the embossing depth will be shallow and the texture will be blurred.
- Especially for highly conductive copper or soft copper strip, the reduction rate and lubrication state need to be precisely controlled.
4. Compatibility of rolling tension system
- The tension system of small and wide strips responds slowly. Once the tension is unstable, it will cause cracking or deformation of the grain.
- Usually it is necessary to configure a high-sensitivity tension feedback device and an automatic deviation correction mechanism.
2. Analysis of key technical points
| Technical aspects | Technical requirements | Critical Control Points |
|---|---|---|
| Flower roller engraving | Laser/etching/CNC engraving, accuracy ±0.005mm | Pattern consistency and even depth distribution |
| Press down control | The reduction rate needs to be precise, usually 3%–10% | Avoid crushing, deformation and blurred lines |
| Tension control | High-precision tension tensioner (constant tension system) | Avoid belt breakage, edge bending and misalignment |
| Lubricating oil system | Micro oil/atomized lubricant for embossing | Prevent roller sticking and reduce surface scratches |
| Material selection | High ductility copper, oxygen-free copper, T2, etc. | Soft and hard state matching different pattern effects |
| Automatic correction | CCD visual correction system | Ensure that the belt runs in the center |
| Temperature control system | Maintain constant temperature of the roller | Prevent thermal expansion and contraction from affecting embossing accuracy |
3. Suggestions on technical configuration of embossing equipment
| Device Type | Recommended Configuration |
|---|---|
| Embossing machine type | Double or multi-roller small size embossing machine |
| Flower roller material | Chrome-plated steel roller, ceramic composite roller |
| Control System | PLC+touch screen automatic adjustment system |
| Lubrication system | Automatic oil supply atomization lubrication system |
| Rewinding and unwinding tension control | Servo motor closed loop control |
| Correction system | Photoelectric or CCD tracking correction device |
4. Performance improvement advantages of embossed small-size copper strips
| project | Improvement effect |
|---|---|
| Reflective properties | Can increase the surface reflectivity by more than 20% |
| Adhesion | Stronger bonding with conductive adhesive and thermal conductive adhesive |
| Mechanical fatigue resistance | Surface strengthening to reduce fatigue cracks |
| Appearance recognition | Customized patterns enhance brand recognition |
| Functional integration | Possessing comprehensive optical, electrical and mechanical properties |
Application Examples
- Photovoltaic light-harvesting copper strip:promoteSolar CellsReflection efficiency
- Reflective busbars: Combines welding and reflective functions
- Electromagnetic shielding copper tape：Surface texture regulates the reflection path of electromagnetic waves
- Electronic decorative panel: Beautiful, anti-fingerprint, conductive and compatible
- Car/3C conductive shrapnel: Conductive, scratch-resistant and fatigue-resistant
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