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Screw
Screw Selection
we supply all types of screw as per our clients requirement, you will get precisely what you need from raw material to the finished one. we are specialized in supplying most different type of screws. the processing technology and advantages of designed the screws are used in used in general processing of all kinds of thermoplastic and rubber materials in extrusion and injection molding.
Manufacturing SIze
| SIZE | OUTER DIA | LENGTH |
|---|---|---|
|
MIN > |
Ø30 |
800 |
|
MAX > |
Ø125 |
3200 |
Material Selection
| GRADE | MATERIAL | HEAT TREATMENT | HARDNESS HRC | HARDENING DEPTH |
|---|---|---|---|---|
|
AISI 4140 |
42CrMo4 |
HARDENING |
48-50 |
Thru |
|
En24 |
34CrNiMo6 |
HARDENING |
58-60 |
Thru |
|
En41b |
41CrAlMo7 |
GAS NITRIDING |
60-65 |
0.4-0.6mm depth |
|
H13 |
X40CrMoV51 |
HARD – GAS NITRIDING |
58-65 |
Thru / 0.4-0.5mm depth |
Benefits Of HARD-CHROME Plating
For screw plating, the coating is typically about 0.001 in. thick and does not materially affect the geometry of even the most critical dimensions. additionally, it has a bond strength of approximately 6000 psi when properly applied,
General Purpose Design
General-purpose screws are primarily used in injection molding, which makes sense as there are backpressure adjustments for melting quality in this process,
BarrierDesign
Barrier screws increase melting efficiency and eliminate solid bed break up, allowing for more control and stability. a feed screw designer cannot simply add a barrier section and expect superior performance.
Maddoack Design
Spiral maddock section performs the similar function as barrier screws, at the fraction of the cost. those screws run very well with resin families that are not difficult to feed and flow easily.