Technical Parameter:
1. Material is 38CrMOALA, tempering hardness: 260-290HBS, Metallurgical structure: More than 95% sorbite, crystal particle degree: 6-8 grade, Nitridation layer depth: 0.4-0.7, Nitridation rigidity on surface: 940-1050HV, brittleness less than 2 grade; Linear degree meet national rubber&plastic machinery industry standard; Roughness degree: The surface which is touched with material shall be processed with fine honing, and the fine polishing can reach Ra value of 0.4-0.2; The screw spray welding's nickel-base alloy+WC, thickness: 2.6-3mm; Hardness: HRC62± 2, without crack and flaw; Make bottom part nitridation treatment;
2. Material is 3Cr2W8V, H13(injection chamber), the whole body quenching hardness: HRC60± 2, nitridation hardness: 1050HV, inner hold for fine grinding Ra value 0.4
3. Material: Cr12molvl, the whole body quenching hardness: HRC60± 2, inner hole for fine grinding Ra value 0.4;
4. Diffluencece combing, backflow parts material: Imported SKD61 quenching hardness: Above HRC55 or double alloy structure;
5. Can proceed to plate hard chrome after nitriding screw surface; The thickness for chromeplate is 0.03-0.04mm;
6. The passagewaypart for all kinds of mould, the thickness for plating hard chrome is 0.05-0.08, Polishing fine-coarse degree reach Ra value 0.4-0.2;
Single screw & barrel
| Model |
SJ25 |
SJ35 |
SJ45 |
SJ55 |
SJ65 |
SJ75 |
SJ90 |
SJ120 |
SJ150 |
SJ180 |
SJ200 |
SJ250 |
SJ300 |
| diameter of screw (MM) |
25 |
35 |
45 |
55 |
65 |
75 |
90 |
120 |
150 |
180 |
200 |
250 |
300 |
| Ratio of L/D |
8:1, 25:1, 28:1, 30:1, 33:1 for optional |
Conical twin screw & barrel
| Model |
SJSZ51 |
SJSZ65 |
SJSZ80 |
SJSZ92 |
| Diameter of screw (mm) |
51 |
65 |
80 |
92 |
| Length of the screw (mm) |
105 |
132 |
156 |
188 |
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