A three station shaftless center winding device for foldable OCA optical adhesive film

1、 Basic concepts

OCA Optical Clear Adhesive is a highly transparent double-sided adhesive film used for optical component bonding, widely used in bubble free lamination processes in display panels, touch screens, and other fields.

2、 Structural composition

Composed of release film (protective layer), optical adhesive layer (liquid optical adhesive or solid adhesive film), substrate (PET/COP, etc.), partially containing anti blue light/anti glare functional layers.

3、 Application Fields

Smartphone/tablet touch screen fully integrated, LCD/OLED display module, in car central control screen, AR/VR optical components, electronic paper, and smart wearable devices.

4、 Core Features

• Light transmittance>92%, haze<1%
• Refractive index 47-1.51 (matching glass/ITO)
• Temperature resistance -40 ℃~85 ℃, humidity 95% RH
• Peel strength 5-15N/25mm

5、 Development Trends

Ultra thin (below 25 μ m), low dielectric constant (Dk<3.0), flexible and foldable OCA, integrated quantum dot/microprism, VOC free environmentally friendly formula.

6、 The present invention is a three station turret type central winding device that achieves non-stop three station winding. Due to the characteristic performance requirements of the material, traditional dual station winding has curling, jerking, and adhesion. It is specifically designed for flexible and foldable OCA optical adhesive film curling, using a shaftless method instead of traditional mechanical and pneumatic shafts, and directly achieves central winding with paper tubes or tube walls.

1. The rack is formed by welding square tubes.
2. Rotary tower mechanism (turntable, drive motor, positioning device)
3. Drive system (main motor, reducer, transmission shaft)
4. Tension control device (tension sensor, magnetic powder brake)
5. Guiding mechanism (guide wheel, correction device)
6. Roll up station (3 sets of independent reels)
7. Control system (PLC, human-machine interface)
8. Safety protection device (protective cover, emergency stop switch)
9. Pneumatic/hydraulic system (cylinders, solenoid valves)