Weighcheckers are the Electronic Inspectors conceived to measure the weight of packs, clusters and cartons into Food and Beverage Packaging Lines. They exist in several types but we’ll consider in the following just a particularly simple version based on:
- constant speed motor;
- no one encoder;
- one trigger;
- four load cells;
- open pack safety.
Refer to the figure on side showing one of these devices. It does not uses Shifting-Register principles: only one pack has to exist on top of the (green colour) conveyor). This implies that a prior, (here not shown) Conveyor always has to exists before the measurement area shown in the picture on side, before its trigger. Purpose of this faster additional Conveyor being the separation of the incoming packs, so to assure only one of them shall infeed following inspection area.
One of the simplest, economic and efficient designs for a Weigh Checker (FT-System srl). The model shown on side has a constant speed motor, no Encoder and 4 load cells, whose independent measurements are combined and evaluated to derive the pack weight
Four independent weight measurements are executed, by 4 load cells interposed in between the (green-colour) conveyor and the base plate, after a delay time counted after a pack starts to obscure the trigger photocell. Results averaged to derive a single value representing pack’s weight. An additional photocell, over the trigger one, acts as “open pack safety”, forcing the reject of the pack if encountered too high, i.e. due to non closed sides. Rejectors are mono-cylinder type, on a conveyor immediately following the Weighchecker, controlled by a 24 VDC output. For a model like the one shown above, the standard deviation of the measurement results around 3 grams, when referred to packs weighing 7000 grams whose speed is 800 mm/s. Then, precision results so high that a pack (3 x 4) of 12 containers 500 ml each, where only one is semi-filled (lost product), can be safely identified and rejected. These inspectors are not second checks for fill level or content: their main purpose is to verify:
- completeness of the pack, after a Carton Packer machine;
- liquid content of the pack, considering that a container can be always damaged after the
last fill level inspection and before the ending phases of the Packaging Line.
Links to other pages:
We start here a section of particular relevance for the safety of the Food and Beverages: the inspection of returnable and non-returnable glass empty bottles. Technological field where Graphene™ staff has 21 years of continued direct experience. …
Links to the pages: OverviewIn the video below two adiacent high-speed Aseptic PET Bottling Lines. Visible two Full Container Inspectors with inspections for Asepticity directly in-the-Machines (Filler and Closer). …
EMPTY CANS ARE EXTREMELY FRAGILE AND PRONE TO DEFORMATION. In the one-way conveyors before infeeding the Filler Machine, they reach speed < 5 m/s. Interposed along their journey from the Depalletiser til the Filler a twist, like the one visible here, one more source for deformations and jams (…
Successful operation, Quality and Production, of all the PET Bottling Lines requires PET bottles exempt by deformations which can damage the Filler Machine parts, straight bottles without holes nor objects into, with a perfect sealing area, etc. …
Water drops influence negatively the final performances of the Cap Inspection enacted by mean of camera systems. Refer to the figure on right side, where a green colour scanning line intercepted a water drop scanning, and measured its distance to the bottle’s plastic, greater than toward the closure top surface: a wrong distance.
Cap inspection before the CloserLinks to other pages:  This website has no affiliation with, endorsement, sponsorship, or support of Heuft Systemtechnik GmbH, MingJia Packaging Inspection Tech Co., Pressco Technology Inc., miho Inspektionsysteme GmbH, Krones AG, KHS GmbH, Bbull Technology, Industrial Dynamics Co., FT System srl, Cognex Co., ICS Inex Inspection Systems, Mettler-Toledo Inc., Logics & Controls srl, Symplex Vision Systems GmbH, Teledyne Dalsa Inc., Microscan Systems Inc., Andor Technology plc, Newton Research Labs Inc., Basler AG, Datalogic SpA, Sidel AG, Matrox Electronics Systems Ltd. …
This website has no affiliation with, endorsement, sponsorship, or support of Heuft Systemtechnik GmbH, MingJia Packaging Inspection Tech Co., Pressco Technology Inc., miho Inspektionsysteme GmbH, Krones AG, KHS GmbH, Bbull Technology, Industrial Dynamics Co., FT System srl, Cognex Co., ICS Inex Inspection Systems, Mettler-Toledo Inc., Logics & Controls srl, Symplex Vision Systems GmbH, Teledyne Dalsa Inc., Microscan Systems Inc., Andor Technology plc, Newton Research Labs Inc., Basler AG, Datalogic SpA, Sidel AG, Matrox Electronics Systems Ltd.