Home > Products Information > Injection Molded NdFeB magnet
 


It is a mixture of resin (PA12, PPS) & the Molded NdFeB magnetic powder, after mixing together with the additive, injection produced the magnet is called Injection NdFeB magnet.

The size of Molded NdFeB magnet is small, the magnetic power is high, especially when there is a thin-wall magnetic ring, complex shape precision magnetic accessories etc.

For those precise sizes that cannot be produced by the compression and bonded NdFeB. Owing to the fact that the micro motor is becoming small and compact, especially the brushless motor, they are looking for very high standard of sizes requirements, magnetic power and reliability, therefore, the Injection Molded NdFeB magnet can best fit their requirements.
 
Magnetic Characteristics & other physical characteristics of Injection Molded NdFeb Magnet- END series
EARTH MAGNETS-EPF- END Series
Test method
Unit
END-352K
END-372K
END-392K
END-502K
END-392C
END-502C
END-602C
END-702C
END-364
END-374
END-
1102
www.earthmagnets.com
Magnetic power
-
-
Nd-Fe-B alloy
Base resin
　
　
PA12
MAGNETIC PROPERTIES
-
-
Isotropic
Anisotropic
Residual flux densityBr
　
mT
450
490
540
590
550
590
640
680
450
500
720
Coercive forcebHc
　
kA/m
310
330
350
370
340
370
390
410
290
310
477
Intrinsic coercive forceiHc
　
kA/m
680
680
670
690
690
690
690
690
710
710
987
Maximum energy productBHmax
　
kJ/m3
36
42
48
56
49
56
64
72
36
40
90
Thermal coefficientΔBr/Br
　
%/℃
-0.1
-0.1
-0.1
-0.1
-0.1
-0.1
-0.1
-0.1
-0.1
-0.1
-0.1
Thermal coefficientΔHc/Hc
　
%/℃
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
OTHER PROPERTIES
　
　
　
　
　
　
　
　
　
　
　
　
　
Tensile strength
ASTM D-638
MPa
46
42
40
37
45
43
37
35
42
35
-
Flexural strength
ASTM D-790
MPa
98
93
85
75
95
92
80
70
82
70
70
Flexural modulus
ASTM D-790
MPa
9500
12000
15000
17500
11000
12000
17500
19000
21000
22000
12859
Izod impact (with notch)
ASTM D-256
J/m
42
42
40
40
41
41
40
40
42
40
39
Rockwell hardness coefficient
ASTM D-785
R scale
105
108
110
110
108
110
110
110
117
120
108
Heat deflection temperature1.82Mpa
ASTM D-648
0 C
130
135
150
153
145
150
153
155
215
217
155
Specific gravity
ASTM D-792
-
4.7
5.0
5.4
5.7
5.0
5.4
5.7
5.9
4.6
5.0
5.3
Water absorption (230C 24 hrs in water)
ASTM D-570
%
0.06
0.05
0.04
0.04
0.04
0.04
0.04
0.04
0.01
0.01
-
Molding shrinkage coefficient　
DIC Method
%
0.5
0.5
0.5
0.4
0.5
0.4
0.4
0.4
0.4
0.4
0.4
Coefficient of thermal expansion
DIC Method
0 C
6.1X10-5
5.2X10-5
4.0X10-5
3.7X10-5
5.2X10-5
4.0X10-5
3.7X10-5
3.7X10-5
3.2X10-5
3.0X10-5
3.7X10-
5
Melt flow rate （2700C x 5 kg)  　
ASTM D-1238
g/10min
600
500
300
200
500
300
200
150
 -
 -
160
Melt flow rate （2700C x 10 kg)  　
ASTM D-1238
g/10min
 -
 - 
 -
 -
 -
 -
 -
 -
110
70
-