Container/Cap Inspection

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MD Packaging is now a preferred distributor for FT System for both sales and service in Canada.

FT Label Inspection
FT Systems Container and Cap Inspection
FT Systems Cap and Container Inspection
FT High Frequency

HF – HIGH FREQUENCY

Used to measure changes in the fill level.

The system uses high frequency technology to detect changes in an electromagnetic field caused by variations in the fill level region of the container. As the container passes through the sensor the container acts as a dielectric and the electromagnetic field is altered. The change in the electromagnetic field is proportional to any variation liquid level.

FT Xray Fill Level

RX – X-RAY

Used to measure changes in the fill level.

The system uses a low energy x-ray beam to measure the density of the product in the fill level region of the container. The X-ray beam passes through the container and is attenuated by the product blocking the beam. The amount of energy attenuated by the product is proportional to the amount of product in the fill level region. The X-ray beam is received by a linear diode array that measures the energy of the beam across the full width of the container. This analog data is used to calculate the fill level.

SE – OPTICAL SENSORS

Used to detect the presence of elements such as caps, labels or in the detection of colour accuracy.

IR – INFRARED

Used to determine fill level and to backlight products when non-transparent to visible light.

The system utilizes a infra-red emitter/receiver with a wavelength tuned to the absorption band of water.
The infra-red beam penetrates the side of the container in the expected area of the fill level. A receiver is positioned on the opposite side of the container to detect the beam after it passes through the container. If the liquid is in the path of the beam, the infra-red light will be blocked.

LS – LASER

The laser technology is also used for pressure measurement by means «Spectroscopy». The system uses a tunable diode laser absorption spectroscopy technique. Certain molecules, when in the gaseous state, have a particular and unique frequency where they absorb light. This allows the measurement of the presence and quantity of a specific gas with an optical method. The laser emits a beam at a specific frequency on one side of the container and a receiver measures the beam after it has passed through the headspace of the container. The patented technology gives to perform the measurement independent of the colour or material of the bottle.

PX – PROXIMITY

Used to measure shapes and profiles distances in order to control positioning or pressure.

The system uses an inductive proximity sensor that measures the profile of the closure or can end. As the container passes through the system, the sensors takes multiple readings across the top of the can end or closure. These readings are combined and a profile of the can end or closure is generated. Containers with internal pressure will have a convex profile and containers with vacuum will have a concave profile. Containers that have lost pressure or vacuum will have a wrong profile. The amount of internal pressure or vacuum can often be detected by the height of the convex profile on pressurized containers or the depth of the convex profile on containers with internal vacuum.

Used also (inductive sensor) to detect the presence of metallic objects such as closures or foreign object in the containers.

FT Artificial Vision

VA – ARTIFICIAL VISION

Used to inspect caps and labels positioning.
We analyze integrity and correspondence of surfaces even with 3D reconstructions. We use many different models (depending on the inspection needs) of industrial cameras. Each camera incorporating a microprocessor for the direct analysis and an optical industrial optimized for the type of analysis to be carried out. Typically the camera is associated to a specific light system.

AS – ACOUSTIC SOUND

Used to check the closures by means of sonar principles (twist-off and crown caps).

The acoustic inspection is performed using sonar technology. As a container passes under the sensor, the system emits high frequency sound pulses. When the pulses contact the metal cap, the cap reacts with a sound at a specific frequency depending on the tension of the cap generated by the internal pressure of the container. A microphone inside the sensor detects the return signal and analyzes the frequency.

Containers that have an internal pressure that is below the minimum threshold will generate a frequency that is distinctly different from a container with the correct internal pressure. Any container generating a frequency that falls outside the acceptable limits will be rejected. According to the resonance frequency of the cap and analyzing the waveform returned it is possible to detect containers that have low internal pressure. System can also be used to inspect internal vacuum on plastic containers with composite closures.

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