Screws and Cylinders
Energy at the Service of Your Future
There are two fundamental characteristics to have a high-performance screw, both in terms of product quality, productivity and economic sustainability: the choice of steel and the choice of profile. Koffer Technik is able to support the customer in choosing the best combination, based on the polymers transformed and production needs.
3-zone screws
barrier screws to
high plasticization
screws with mixer
PVC screws
custom screws based on
to the type of polymer
Our solutions:
OUR SCREWS up to 80mm diameter
| Name | Material | Treatment | Hardness | Abrasion resistance | Corrosion resistance |
| KS-W | 41CrAlMo7 | Nitriding | 950-1150 HV | 20% | 20% |
| KS-H100 | X155CrVMo12 | Temper at heart | 57-62 HRC | 60% | 40% |
| KS-P3 | Powder metallurgy | Temper at heart | 56-62 HRC | 80% | 80% |
| KS-P9 | Powder metallurgy | Temper at heart | 56-62 HRC | 100% | 40% |
OUR SCREWS over 80mm diameter:
For sizes larger than 80mm in diameter, we use our KS-W nitrided steel screw, to which we apply a coating over the entire propeller, to increase wear resistance.
| Name | Material | Treatment | Hardness | Abrasion resistance | Corrosion resistance |
| KS-W | 41CrAlMo7 | Nitriding | 950-1150 HV | 20% | 20% |
| Name | Material | Base | Hardness | Abrasion resistance | Corrosion resistance |
| KS-W12 | Stellite gr. 12 | Co | 44-48 HRC | 40% | 60% |
| KS-W5 | CastoTig 5 | Fe | 58-62 HRC | 80% | 40% |
| KS-W56 | Colmonoy 56 | Ni | 52-56 HRC | 60% | 80% |
| KS-W83 | Colmonoy 83 | Ni | 56-60 HRC | 100% | 80% |
The plastic materials on the market and their characteristics are constantly evolving, which is why we are constantly looking for innovative solutions. Our screw profiles are the result of years of experience.
Koffer Technik analyzes your production process and develops customized solutions: less waste, more productivity, better lamination.
All components of the injection unit are subject to wear: abrasive wear, corrosive wear, mechanical wear. Rapid wear is a cost, not only because of the need for new components, but also because worn components lead to an inefficient plasticizing process, with more waste and lower productivity.
COMPLETE TIPS
In addition to having a wide selection of complete tips, available from stock, for most European machines, KofferTechnik also offers specific solutions capable of counteracting wear phenomena and increasing resistance to abrasion and corrosion, using PVD coatings or sintered steels.
We also design and manufacture ball tips, mixing tips, quick-lock tips.
Our tip, with hardened valve and thrust washer and inserted fins, is available in stock for almost all European presses.
NOZZLES
Koffer Technik progetta e produce ugelli di vario tipo: ugelli diretti, ugelli con testina, ugelli speciali. Per contrastare fenomeni di usura, realizziamo ugelli con materiali sinterizzati o applichiamo rivestimenti PVD, in grado di garantire una maggior durata nel tempo.
BIMETALLIC CYLINDERS
The world of plastics today presents ever new materials, very often with highly abrasive and corrosive additives and mineral fillers. Koffer Technik offers top-quality bimetallic cylinders, produced in Germany.
In addition to the cylinders, Koffer Technik offers the necessary injection unit accessories:
– Nozzle holder heads
– Nozzles
– Mixing nozzles
– Filter nozzles
– Rings
OUR BIMETALLIC CYLINDERS
| Name | Base | Hardness | Abrasion resistance | Corrosion resistance |
| Kobral-K40 | Fe | 60-65 HRC | 50% | 50% |
| Kobral -K100 | Fe | 64-68 HRC | 60% | 60% |
| Kobral -K50 | Ni-Cro | 48-56 HRC | 20% | 100% |
| Kobral -K200 | Ni | 60-65 HRC | 100% | 80% |
DESIGN
In addition to the design and production of the injection unit, we also offer a complete service:
SERVICE
Plug and Play injection groups, wired and ready for installation Design special plasticizing groups with reduced diameter, based on the weight and dosing volume required by the customer Study of the customer’s plasticizing data and analysis of defective products to identify the causes and propose customized solutions.
QUALITY
Koffer Technik’s philosophy is to offer customers high quality spare parts with high added value. Only certified materials of Italian and German origin. Multiple quality controls during the production phases. Research and Development: continuous updating on the polymers present on the market and their critical issues, continuous research into cutting-edge technological solutions (from design to materials).
