Injection molding screws from GEM Technic are built for consistent end-product quality, along with high performance and wear resistance.
Feedscrews:
custom design screws: utilize our expertise to solve problems and help develop new products or processes. These screws are specifically designed to the customers process.
general screw design: uncomplicated designs for Nylon, PVC, high temp and GP profiles. These are typically designs that are process proven.
customer supplied screws: screws manufactured to your design and supplied drawing.
screw tips and endcap system: special tips, tip valves, mixers, fillters, nozzles, end-caps and barrel adapters.
Barrels: All size of barrels can be standard nitrided or with bimetallic liners.
Rebuilds: complete screw re-surfacing, repair, re-cutting and modifying

Standard base material for screws:
DIN 41CrAlMo7(DIN 1.8509)  Nitralloy 135M  GB 38CrMoAlA  JIS SACM645  BS EN41B  41CrAlNi7
DIN 31CrMoV9(DIN 1.8519)
DIN 34CrAlNi7(DIN 1.8550)  SAE 8550
DIN 42CrMo4(DIN 1.7225)  AISI 4140 HT, AISI 4340 GB 42CrMo  JIS SCM440
GEM Technic has invested in PTA welding technology allowing us to deposit a full range of alloys. Different hardfacing materials are available. We can discuss the benefits and draw backs with you to help select the correct material and to determine if hardfacing is a good idea for your application.
OD of flights are hard faced with:
Cobalt-based Stellite Alloys: Stellite #6, Stellite #12, Stellite #1
Nickel-based Colmonoy Alloys: Colmonoy #56, Colmonoy #57, Colmonoy #83, Colmonoy #86, Colmonoy #88
Additional hard facing can be provided as specified.
Other common base materials are:
Tool Steel: W.NR. 1.2379  DIN X155CrMoV121, X153CrMoV12(DIN 1.2379)  AISI D2  JIS SKD11 PM A11, etc.
W.NR. 1.2344, DIN X40CrMoV5-1(DIN 1.2344)     AISI H13    JIS SKD61
CPM-9V, CPM 10V, Vanadis 8, Vanadis 10, Böhler M390
Hastelloy C-276
Inconel 625, Inconel 718
Stainless Steel: 17-4 PH   DIN 1.4542  AISI 630
ion nitriding and gas nitriding
total carbide encapsulation
hard chrome plating(HCP): to protect the root diameter and sides of the screw flight from normal wear and corrosive conditions

Injection molding machine makes:
Haitian, Chen Hsong, Welltec, Yizumi, Tederic, Sound, 
CLF(Chuan Lih Fa), FCS(Fu Chun Shin)
Special engineering plastics:
PPS(halogen free)+50%GF, PA(halogen free)+65%GF, PA5T(halogen free), PA6T(halogen free), PA9T(halogen free), PA10T(halogen free), LCP(halogen free)+50%GF, PEEK, PEI, PPT, POM, PPO, fluoroplastic






Key words: schnecken und zylinder, šneků a komor, plastifikační jednotky, dodáváme šneky, komory a jiné plastifikační jednotky, šneky a valce, plastifikační válce a šneky, závitovky, Reparación y fabricación de conjuntos de extrusión, camisa y tornillo, punta válvula y asiento de inyección; máquinas para la industria plástica, componentes de la extrusora, 
viti di plastificazione, viti, cilindri, puntali, teste e ugelli, progettazione profili vite, iniezione, stampaggio materie plastiche, viti per iniezione, gruppi di plastificazione, viti con profilo speciale, viti nuove con puntali (complete), viti e cilindri di plastificazione, viti, cilindri, puntali vite e teste cilindro, camera di plastificazione, viti e cilindri e puntali vite, 
šneky, komory, RSP a ostatní příslušenství pro vstřikovací jednotky vstřikolisů