Nylon Injection Molding
Services On Aria
Molded nylon components offer robust strength, along with resistance to temperature variations and a wide array of chemicals.
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What is Nylon Plastic?
Nylon is a kind of high performance thermoplastic engineering plastic, with good mechanical properties, wear resistance, chemical resistance and many other advantages, through injection molding can efficiently produce nylon products with complex shapes and accurate sizes.
Description
Full Name
Nylon (PA)
Process
Finishing options
Mold texturing，Pad printing，Laser engraving，Electroplating, Bead Blasting
Applications
Impact-resistant applications, Appliances, Housings, Toys
Prices
$$
Features
Appearance
Black, White, Transparent and all colors
Strengths
Good Heat resistance , Low friction coefficient, Lightweight
Tensile Strength
12,400 PSI
Elongation at Break
84%
Density
1.14 g/㎤
Subtypes Of Nylon Plastics
Property
Nylon 11
Nylon 12
Nylon 46
Nylon 66
Nylon 6630% GF
Density (g/cm3)
1.04
1.31
1.20
1.17
1.38
Linear Mold Shrinkage Rate (cm/cm)
0.0083
0.00694
0.0190
0.0139
0.00440
Rockwell Hardness (R)
107
98
95
114
117
Tensile Strength at Yield (MPa)
37.1
46.1
73.9
72.5
155
Elongation at break (%)
119
67.4
43.4
47.1
4.03
Flexural Modulus (GPa)
0.948
5.66
2.64
3.09
7.96
Flexural Yield Strength (MPa)
119
136
108
229
Drying Temperature (°C)
90
92.6
93.7
81
82.2
Melt Temperature (°C)
261
224
303
279
285
Mold Temperature (°C)
48.9
70.7
103
74.9
86.1
Advantages of Nylon Injection Molding
There are many benefits derived from Nylon plastic molding, Some of the advantages of the material include:
Good mechanical properties
Nylon products have high strength and toughness. It can withstand large external forces and is not easy to break.
Good thermal stability
In a certain temperature range, nylon injection molded products can maintain their mechanical properties and dimensional stability.
Low friction coefficient
Nylon material can reduce the friction between components, thereby improving mechanical efficiency and reducing energy loss.
Good insulation
Nylon has a high volume resistivity, which can effectively prevent the conduction of current and ensure the safe operation of electrical equipment.
Good weather resistance
Nylon injection molded products can maintain their color and performance basically unchanged for a long time,
Applications of Nylon Injection Molding
Nylon plastic can be easily processed and shaped, so the products made from this plastic are always diverse and rich, giving consumers many different choices.
Nylon Injection Molding Material Properties
Nylon Plastic Properties
Value
Tensile Strength (Yield) （MPa）
50.0 - 90.0
Flexural Modulus（GPa）
1.30 and 3.70
Maximum Service Temperature（℃）
100 –280
Chemical Formula
(C12H22N2O2)n
Glass Transition Temperature（℃）
47-70
Heat Deflection Temperature（℃）
95-100
Drying Temperature（℃）
80
Drying Time（hr）
2-3
Mold Temperature（℃）
50～90
Melt Temperature（℃）
260～290
Injection Pressure（MPa）
90～140
Injection Speed（ mm/sec）
HIgh
Cooling Time（S）
20～60
Scrap Quantity（mm）
3～8
Back Pressure（MPa）
2～6
Clamping Force（ton/in2）
4～８
Return Speed (rpm)
70～90
Shrinkage
0.6%
Nylon Injection Molding Design Guide
Wall Thickness
Generally, the recommended wall thickness for nylon parts ranges from 1 – 4mm. For example, a small nylon housing for an electronic component might have a wall thickness of 1.5 – 2mm to ensure proper filling of the mold and structural integrity.
Avoid sudden changes in wall thickness. If a change is necessary, use a gradual taper or a fillet to transition between different thicknesses. A fillet radius of at least 0.5mm should be used to reduce stress concentrations.
Radii
Nylon is stress-concentration sensitive at sharp corners. Thus, it’s vital to design parts with corner radii over 0.5 mm. Optimal performance is attained when the radii equal 75% of the nominal wall thickness.
Bosses Design
The height – to – diameter ratio of bosses should be carefully considered to prevent sink marks. A ratio of 2:1 or less is usually recommended to ensure good part quality.
Draft Angle
For nylon, a minimum draft angle of 1 – 2 degrees is recommended for internal features and 0.5 – 1 degree for external features.
Part Tolerances
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