Impurity analyzer

Calpas plastic raw material appearance black spotsImpurity analyzer

Rotary disc typeCalpas-RIntroduction

Especially for opaque colored particles andHigh transparency particledesign

Industry background

1. SH/T 1541In recent years, manual identification of particle appearance will be upgraded to instrument based approval. The original standard specifies the definitions of black particles, black spot particles, and color particles, and specifies the number of tests to be conducted1Kilogram sample. It is very difficult to detect black spots with so many samples. The efficiency and accuracy of one person completing a quantity of one kilogram are unacceptable.

2. Introduction to Instrument Method: Taking1Kilogram particle sample, analyzed for heterochromatic aberration using a simple particle scanning deviceThe analysis results are more accurate than manual color selection methods, and the mainstream methods currently on the market are:

1. Single sided single lens+Surrounding lighting+Vibration groove. When particles pass through the vibration zone, the vibrator cannot guarantee the particles360°Rolling, so when passing under a single lens, black spots and mixed colors on the surface of particles facing away from the lens cannot be monitored. Due to the characteristics of opaque particles, the optical properties of their shadows (appearing gray) are very similar to those of black dots, causing mutual interference;

2. Single sided single lens+Stereoscopic lighting (back light source)+Conveyor belt. Removing shadows is the highlight of this method, but it still cannot guarantee that the surface where the black dot is located will be illuminated by the probe. However, the probability of one side of a particle going up or down is predictable, so ensuring that shadows do not affect the measurement and ensuring repeatability is the original intention of the design of this method, which is the method of this device;

3. Double sided dual lens+Stereoscopic lighting+Conveyor belt. This is a sophisticated method, where particles are fed into a hopper and transported to a conveyor belt, where they rotate relatively stably along with a transparent turntable. The transparent turntable has probes at its upper and lower ends, designed to illuminate the entire body of the particles as 100% as possible. See the end of this article.

Working Principle:

CALPASMainly composed of high-resolution high-speed cameraslongscorchedCameraall-roundAVIDOM照明系unify(Full angle with backlight,specially designed forTransparent and opaque particlesdesign）, threeWeivibrateMove inMaterial seriesunifyAnd it can also be usedcomeanalysisimpurityblack dotdifferentColor anddifferentformalAIsoftdocumentconstituteCheng.

method①：Use regular LED lighting (circular lighting or lighting from several directions).

The instrument forces the algorithm in the software to determine the color of the shadow (blackness, grayscale, chroma),RGBWhat is the range of various methods for describing optical colors? The software tells the system that these shadows are normal, and when the system issues a report, it will automatically remove similar shadows or black spots (considered as normal samples). The actual situation is that the impurity colors in these particles match the shadow colors and will also be treated as normal samples. However, it has been proven that this method can cause serious omissions or misjudgments.

method②Stereoscopic lighting system.

In the field of appearance inspection, "uniform illumination without shadows" is a very difficult optical combination problem.The position and angle of the light source, as well as the strength of the backlight, can all cause the intensity of refraction.Calpas-RThe combination of light sources has been specially set and obtained the "specializedliMinimized the shadow effect caused by the angle of light as much as possible.

image. Eliminating the influence of shadows

Figure Opaque particles

If ordinary circular lighting technology is used, opaque particles can easily form shadows between two particles, and the detection of black spots can be easily misjudged by the instrument360°The three-dimensional lighting system can evenly illuminate the surface of opaque particles and eliminate shadows through backlighting to ensure image quality,Detecting genuine impurities.

The problem of black spots in holes with holes on the cross-section is quite complex, and it cannot be guaranteed that 100% of the light will cover and form a shadow free effect, and the measurement cannot be satisfactory.

Detection range:

• Ordinary particles (e.gPPThePETheABS）Impurities in the material, including black spots and discoloration;

• Foreign impurities;

• Highly transparent or highly reflective particles (e.gPC/PMMA）Black spots, heterochromatic spots, gel spots, etc;

• Opaque modified particles can be in various colors such as white, gray, red, etc;

• The size and shape of the particles themselves.

The main components include:

• High performance high-speed camera（CCDOr users);

• A three-dimensional lighting system with adjustable illumination intensity;

• A three-dimensional vibration feeding system with adjustable feeding speed;

• Analysis software (standard analysis software andAIIntelligent software).

• Automatic sorting device

• Automatic cleaning device for feeding track

• Whole machine dust prevention device, etc

• If users have special application requirements, customization can be made to meet their detection needs.

CalpasEasy to operate, user-friendly software interface, one click fully automatic operation for automatic feeding, testing, and generating testing reports. The software can be installed on ordinary home computers, with low noise, fast speed, high repeatability during the testing process, and equipped withCalpasThe standard board is used for regular calibration of instrument detection size data.

Key Features:

• Rotating disc type, where particles are stationary relative to the disc;

• Stereoscopic Lighting Specialtylitechnology-Obtained, almost eliminating the shadow of particles;

• Small impurity sizes can be detected10µm；

• It can detect black spots, white spots, various impurity points of transparent materials, and eliminate the influence of black lines caused by the lighting mode of the light source;

• Modularization, currently measuring particle coloration. In the future, if you want to measure anomalies, you can simply add a module without having to buy any additional instruments! If you want to increase the hopper and change the light source, you don't have to buy any more instruments!

• Can detect and record all impurity information;

• Chinese software can be installed on commercial computers, with custom settings for impurity names, color ranges, size, and statistical analysis to help customers identify the cause.

Technical Specifications:

• System Name:Calpas plastic raw material appearance black spotsImpurity analyzer-Rotary disc type

• System function: A set of systems to detect particle discoloration and anomalies.

• Sample status: transparent, semi transparent, opaque

• Analysis time:0.5~5min/kgparticle

• Analysis method: Static&Dynamic overall analysis

• Particle size:10~30,000Mm

• Particle shape:10~30,000MmGrading interval

• Particle chromaticity user-defined, automatic&manual calibration

• Light source: Stereoscopic lighting, eliminating the influence of shadows.

• Feeding system: 3D vibrating groove, customizable width, adjustable feeding speed

• Camera Resolution: Resolution1280×960Or above.

• repetitivenessSD.＜0.5%(repeated measurement)SD.＜1%(Quick measurement)SD.＜5%（mean rel.SD）

• Hopper capacity:1-5Kg.

• Hardware control: The hardware control part automatically connects to software drivers.

• Test report: Automatically generate a test report after the test is completed.

• Regular data cleaning: Automatic data cleaning cycles can be set according to requirements, such as1Months3Months6Wait for a month.

• Noise: Large noise less than65Decibel.

• Material trough self-cleaning system: equipped with self-cleaning system.

• Testing software includes computer: operating systemwin7orwin7Above, the hardware meets the requirements of the testing software, real-time image processing, and the computer is a commercial machine.

Introduction to Dual Probe Rotary Black Spot Impurity Detector

Product Features

• Dual probe detection system

• Analysis of Alien Colors

• Variable lighting control

• Stable and convenient operation

• The device can move freely

• Automatic balancing device

• Industrial computers are efficient and stable

• Fully automatic ionized air cleaning system

• Small detection size: 20 µ m

• Detection speed: 200kg/1 hour