As our special advantage products,food screws used for inflating machines to make leisure food like rice bread,rolling snack,etc.

Screws for inflating food extruders

Double screw extruders: Dia30--85mm 

Single: Dia65--100mm

The compression ratio of the screw can be designed according to different products and mixtures.

Materials:  Alloy-steel of high quality

1)38 CrMoAlA(JIS SACM645)2)42 CrMo(AISI 4140)

Technical Index

1.Hardness after hardening and tempering: HB280-320 

2.Nitrided Hardness: HV850-1000

3.Nitrided case depth: 0.50-0.80mm

4.Nitrided brittleness: less than grade 2

5.Surface roughness: Ra 0.4

6.Screw straightness: 0.015 mm

7.Surface chromium-plating's hardness after nitriding: ≥900HV

8.Chromium-plating depth: 0.025~0.10 mm

9.Alloy Hardness: HRC50-65

10.Alloy depth: 0.8~2.0 mm

Materials & Processes

1.Quality 38CrMoAlA (JIS SACM645) 

2.Quality Duplex Stainless Steels

3.42 CrMo (JIS SCM440)

4.40Cr

5.GH113

6.SKD11

7.SKD61 (H13) 

8.Gr12MoV

9.Quality Powder Metallurgy Raw Materials

10.Cold/Thermal Spray Hard Metal Process

11.Advanced nitriding Process

12.Corrosion & Abrasion Resistance Bimetal Spraying Process

CNC Milling Machine

7.2 meters pit tempering furnace

7 meters pit nitriding furnace

Corner of the workshop

Quality Control

1.Management System:ISO9001:2008

2.Advanced quality inspection center

3.Digital vickers hardness tester

4.Portable’s hardness machine

5.Metal ultrasonic flaw detector

Packing

office building

Welcome your inquiry about any more info you like.

Welcome your inquiry about any more info you like.