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Lubrication-free medicine dispenser

This medication dispenser works cleanly and precisely thanks to the lubrication-free drylin XY table.

This machine is used to remove medicines from their original packaging and then repackage them in smaller doses. This is done in one operation, thus saving 30% to 50% of the time required. Due to the contact with unpacked tablets, absolute freedom from lubricants is required. Therefore, the packages are moved with the help of a drylin SLW XY table.

Profile

  • What was needed: drylin SLW XY table
  • Requirements: A precise and completely lubrication-free positioning unit for blister packaging was sought.
  • Industry: Medical technology
  • Success for the customer: So far, the prototype has been used flawlessly for one year. The bearings enable completely lubrication- and maintenance-free operation.
Medicine dispenser

Problem

This machine can be used for pharmacies to take medicines out of their original packaging and pack them into standardised blisters.
After the tablet is removed from the packaging, it falls into a stainless steel hopper. At the bottom of the hopper, an optical system detects the passage of the tablet, which finally falls into the correct cell through correct positioning of the blister pack. Software then activates the movement of the motors so that the next set-down position is positioned under the hopper. At the same time, the hopper is lifted by a third motor by a few millimetres so that the tablet is not crushed. This work step is repeated until all cells are filled. Finally, the blister is completely returned to the starting position.
Normally, two work steps are required for the repackaging process: Unpacking the tablets or film-coated tablets and blistering them. This application, on the other hand, reduces these two operations to one. This results in a time saving of 30 to 50%, less contact with the medicines and increased safety during handling.
It brings a significant increase in efficiency without being too big and offers itself as a cost-effective alternative to the otherwise extremely space-consuming machines designed for larger capacities.

Solution

For the correct positioning and thus the filling of the blister, the designer relies on a drylin XY table (part number SLWS-XY-0630-R-320-210 with high helix thread 8 x 15). The positioning unit moves the blister pack under the steel hopper on a horizontal plane in the X and Y axes with precision so that the tablets always land in the respective cell with pinpoint accuracy. They are 100% lubrication-free, which was important in this application due to the direct contact with the tablets.
The XY table is driven by NEMA stepper motors (part no. 57HS13 NEMA 23, 1.8 Nm), which are controlled by self-programmed software via an InerpCNC electronic controller. For reasons of speed and convenience, this software runs on a PC with a touch screen.
The use of the drylin adjustment unit has proven to be a success for the customer. As a result, the original prototype has been in continuous use for over a year now without any problems.

Medicine dispenser
Medicine dispenser
Medicine dispenser

Pharmacie du Colombier, François Besvel, Lieusaint, France

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