OneBoxVision Blog

3 ways to perform defect visualization in a 100% inspection system



Let's talk about defect visualization and how to use it in 100% inspection solutions,when performing inspections on any material there is always a desire to visualize the defects that are found. This is important as it enables an engineer to answer questions about defects found during inspection.

Topics: Plastic film inspection 100% Inspection ImageFlow

Two new features - web edge detection and multiple algorithms

A short video showing how to use ImageFlow to auto track edges and how to use multiple algorithms.

Topics: Print inspection systems Plastic film inspection ImageFlow

100% inspection tool for process control

Often it's difficult in high speed manufacturing to get good feedback on what you would consider obvious issues. Opacity measurement, color reflectivity in plastic film processing, textiles, coating variations for converters, formation analysis for non woven inspection and other visual measurements that change during a long run are not normally measured in real time and 100% inspection vision systems usually target defects that are visually obvious, ignoring the slow moving process issues that cost you dearly in the long run.

Topics: Machine Vision Plastic film inspection Plastic film processing Non-woven Inspection

What needs to be measured in plastic film?

Looking at the plastic film industry from the point of view of an inspection supplier can be quite narrow. This article focuses on measurement requirements often ignored.  

Topics: Surface inspection systems Plastic film inspection Plastic film processing

Inspecting plastic film with perforations while doing a 100% optical inspection on the complete width

Inspecting plastic film with perforations

Often extruders are now perforating their substrate to enable produce to breath or other niche requirements. The issue for the manufacturer is how to inspect the film and perforations without alarming every hole. If the area is simply masked then if the perforations are not present or expand the extruder will never know.

Here is what we have done at OneBoxVision. We have built an application that can run all of the following at the same time.

Topics: Plastic film inspection 100% Inspection

Adaptive surface inspection improves quality

What is adaptive surface inspection?

Adaptive inspection is the process a vision system can use to update it's segmentation parameters automatically. This is the key to inspecting substrates that have a natural variation in appearance but there is still the requirement to detect low contrast defects.

Topics: Plastic film inspection 100% Inspection Non-woven Inspection

Block statistics to measure opacity, fiber direction and coating uniformity

Why Block statistics?

We are always looking to build novel measurement tools. The more we learned  about the requirements for measuring opacity, we saw a need for a  tool we called block statistics. We break down the web or sheet into programmable discrete sections and then apply a variety of algorithms that depend on the optical configuration deployed. 

Topics: Plastic film inspection Non-woven Inspection

Plastic film defect segmentation

Roll defects versus film defects

There are so many sources of defects in plastic film processing. By  segmenting according to roll or film, root causes can be addressed. The  table below looks at providing an exhaustive list for the both blown and it can also be applied to cast processes also.

Topics: Plastic film inspection 100% Inspection Plastic film processing

Beginners guide to cast film extrusion

 Cast Film Extrusion Technology

 The cast film extrusion process  is gaining increased popularity and enjoying sustained growth worldwide.  New lines are being installed in a significant number and the market segments penetrated by this technology are on the rise.  This article identifies the main components of a cast extrusion line and presents the fundamental aspects that require consideration when approaching cast film technology.

Topics: Plastic film inspection 100% Inspection Plastic film processing

Collapsing the bubble in blown film

Why we do it?

As we design inspection systems for the plastics industries, I am always searching for great knowledge bases on the cause of defects and problems in the extrusion and printing processes. The goal for OneBoxVision is to provide information to our clients that will help them improve. I came across a great paper from LyondellBasell.  The following blog entry and supporting document is a mix of info from that white paper and some other sources. Hope you find it useful.

Topics: Plastic film inspection Plastic film processing