Plastic Bottle Thickness Inspection Dilemma

In the wave of modern packaging industry development, plastic bottles as widely used in food, beverage, daily chemical and many other areas of containers, its quality control is critical, and thickness testing is one of the key link. However, the traditional measuring tools in the face of plastic bottle thickness inspection, but seems to be unable to do. Ordinary calipers, micrometers and other tools that rely on physical contact and mechanical measurement principles are facing operational adaptation problems.

1. Plastic bottles are relatively soft and elastic, forcibly clamping the measurement can easily lead to deformation of the bottle, making the measurement data deviate greatly and fail to reflect the real thickness.

2. The special physical structure of plastic bottles poses a greater challenge, as its high transparency causes the light to be refracted and reflected when passing through the bottle, which interferes with the accurate judgment of the traditional optical measurement methods on the boundary and thickness information;

3. The center of the hollow structure of the conventional ultrasound measurement means in trouble, ultrasound signal in the hollow part of the wall and the complexity of the reflection pattern of the solid wall, it is difficult to accurately differentiate and analyze the corresponding bottle wall thickness data, all the limitations make the plastic bottle thickness inspection for a long time lack of efficient, accurate and universal solutions.

Plastic Bottle Thickness Inspection Program

1、Accurate optical focusing and measuring principle advantage: based on advanced spectral confocal technology, the sensor emits multi-wavelength composite light, which is focused on the surface of the plastic bottle and the internal layers of the structure by a special optical system. Based on the differences in the reflection characteristics of different depth locations for specific wavelengths of light, the bottle wall internal and external surfaces are accurately localized, and the deviation of the reflected light wavelengths from the emitted light is precisely calculated, which is converted into a thickness value. This process gets rid of the dependence on physical contact, skillfully circumvents the deformation of soft plastic bottles, and ensures the measurement of the true thickness in the original state.

2、To cope with the challenges of transparent materials and complex structures: For the high transparency of plastic bottles, the spectral confocal technology, with its unique wavelength resolution, effectively filters out the interference of stray light brought about by refraction and scattering within the transparent material, and focuses clearly on the interface of the bottle wall, accurately capturing the thickness information. For hollow structures, the sensor can scan and measure different positions of the bottle wall in sequence, distinguishing between hollow chambers and solid wall thickness areas, realizing accurate detection of multi-layer bottle walls (including the inner and outer walls and possible functional layers in the middle) one by one, giving a complete and detailed distribution of the thickness data, and building up a solid data foundation for the comprehensive assessment of the quality of plastic bottles.

3、Efficient inspection and production line adaptation: In modern packaging production lines, speed and precision need to go hand in hand. POMEAS spectral confocal sensors have high-speed detection capability, and can quickly complete multi-point, multi-area thickness measurement when plastic bottles are flowing in the production chain at high speed, which can meet the quality control requirements under the rhythm of large-scale mass production. With its compact size and flexible installation, it is easy to be integrated into automated inspection equipment and assembly lines, realizing full online monitoring, and providing immediate alarm and feedback once the thickness is abnormal, so as to ensure that defective plastic bottles are effectively intercepted at the source.