7- Polytec: low pressure machine for air and oil filter

This unit was specifically designed for the production of air and oil filters.
The unit can be also connected with carrousel plant with automated recognition of the moulds so to adjust the dispensing accordingly: this allows producing many different size and type of filters at the same time.

6- Polytec 1772: low pressure machine for heavily filled epoxy resin

This unit for was designed for the mixing of a very special epoxy resin used in the oil & gas field for casting joints of flexible pipes connecting the offshore industry to the subsea oil and gas field.
We designed special resin pumps capable to handle an extremely thick chemicals with viscosity higher than 100.000cps and heavily filled, being 70% of alumina inside and with a great variety in size.
For this reason, mass-flow meters were used to instantly monitor the output of the pumps and controlled in a close-loop so to immediately adjust the pumps’ speed to keep the correct ratio, which this materials is extremely sensitive for.
Furthermore this system is extremely sensitive to temperature with a viscosity drop of half every 5°C: for this reason we adopted a very special control so to grant a maximum gap of temperature of only 0,5°C.
The joints must resist to 500bar, so no air bubble must be inside the casting: for this reason a special care was taken to the vacuum, the stirrer and the recycling systems so to avoid any air entrapment and facilitate the escape of air.

5- Polytec 1810: low pressure machine for reparation of wind blades

This unit was designed under specifications of Siemens Wind Power for dispensing of a special formulation for the reparation of their wind blades.

4- Polytec PT/3M: machine for automated dispensing polyurethane paste for modelling

This unit was designed to dispense a two-component thixotropic polyurethane paste used to cover EPS blocks for modelling connected to a robot for its automated dispensing.
This is a new technique for the production of moulds and prototypes.
First a rough milling of EPS blocks is done to give a gross shape of the parts. Then the paste is dispensed over the EPS to give strength, generally in 3cm thickness.
Then a fine milling is done to finely shape the part to its final dimensions.
The advantages of this technique are a lot:
– mould dimensions stability, compared with wooden mould generally used
– fastest process: this process is much faster than the traditional one
– less skilful technicians required: this technique allows hiring a less skilful operators compared to the traditional system
– fully automated system allowing cutting production costs and granting the highest quality of the mold.

3- Polytec PT/3M: machine for dispensing polyurethane paste for modelling

This unit was designed to dispense a two-component thixotropic polyurethane paste used to cover EPS blocks for modelling.
This is a new technique for the production of moulds and prototypes.
First a rough milling of EPS blocks is done to give a gross shape of the parts. Then the paste is dispensed over the EPS to give strength, generally in 3cm thickness.
Then a fine milling is done to finely shape the part to its final dimensions.
The advantages of this technique are a lot:
– mould dimensions stability, compared with wooden mould generally used
– fastest process: this process is much faster than the traditional one
– less skilful technicians required: this technique allows hiring a less skilful operators compared to the traditional system

2- Polytec 1828: low pressure machine for adhesive for flocked materials

Tec Mac was requested to design a very special machine tailored for the mixing of a special adhesive used in the production of flocked materials by one of the biggest company in this field. The main issue was the chemicals used for this application: it is a very reactive formulation so the tank were put under nitrogen blanket and the whole machines was designed to match the ATEX specification being used DMF (di-methyl-formate) as solvent in the B component. Furthermore, in-line flow meters were mounted to constantly check the output and the ratio, using the close-loop technology to instantly change the speed of the pump. Of course, in case of out-of-ratio, the machine generates an alarms and stops the production not to face a quality problem at the end of the line.

1- Polytec 1547: low pressure machine for molding

Low pressure machine used for molding small parts, generally in rigid or flexible polyurethane foam. To speed up the production, the unit is connected with a carrousel and thanks to the highly automation used, with automated recognition of the moulds so to adjust the dispensing accordingly: this allows producing many different size and type of parts at the same time.
This machine is generally used for the molding of flexible polyurethane foam parts like arm rests, pillows, head rests and similar equipment.
The unit can be also be equipped with hot water washing for a more environmentally friendly cleaning of the mixing head.