Plastics Industry

 
 
Project:
Various plastic parts with different geometries and dimensions shall be printed with a two coloured manufacturer logo.
The customer's requirements regarding the printing system include an output of 1,100 parts/h, a maximum of flexibility regarding processable parts, as well as expansion possibilities (fully automatic feeders, 3rd printing position, camera system).

Project realisation:
For the printing of the plastic parts Tamponcolor chose a transfer system with 20 moving workpiece carriers. Part specific fixtures are mounted on these carriers to transfer the parts through the different processing stations. First process step is the plasma pre-treatment to prepare the surface of the polypropylene parts for the print. Two servo driven pad printing machines TAMPONCOLOR TC 80-100 T/servo are the next stations. Both are equipped with a fully automatic pad cleaning device . During the print the workpiece carriers are held in position by pneumatic indexing units. The drying of the workpiece is realized by a succeeding drying station with a short-wave IR radiation source.

The unloading of the workpieces is carried out by a servo axis handling. Depending on the part geometry the handling can be equipped with pneumatic grippers or vacuum suction cups.

The entire system is designed to be retooled for a new product and print image (about 50 different variants with 6 different prints) within a very short period of time.

This is achieved by the use of servo-electric drives for longitudinal and vertical positioning. Their position parameters can be stored and recalled component-specific in the PLC.

For the later expansion with an additional pad printing machine and the use of fully automated feeding systems, corresponding extension stations have been provided in the design.

Footprint ca. 11 x 3.5 m.

Customer benefits:
By the use of pad printing technology, the customer has the possibility to respond flexibly to customer requests and orders at a high volume for a great variety of parts with different geometries and dimensions.
Maximum output with minimum set-up times (≤ 5 minutes for the entire machine).