FAQ
What materials can you work with in CNC machining?
We work with a wide range of materials including aluminum, stainless steel, brass, copper, titanium, plastics (e.g., POM, ABS, PTFE), and specialty alloys. If you have specific material requirements, our team can advise the best option for your application.
What industries do you serve with your CNC machining services?
Our CNC machining services cater to a variety of industries including aerospace, automotive, medical, electronics, robotics, and industrial equipment manufacturing. We also support rapid prototyping and custom low-volume production.
What tolerances can you achieve with CNC machining?
We typically achieve tolerances of ±0.005 mm (±0.0002 inches) depending on the part geometry and material. For tighter tolerances, please provide detailed drawings or consult our engineering team.
What is your typical lead time for CNC machining projects?
Standard lead times range from 3 to 10 business days, depending on part complexity, quantity, and material availability. Expedited production is available upon request.
Can you provide custom CNC prototypes and low-volume production?
Can you provide custom CNC prototypes and low-volume production?
Hot Posts
The molding shrinkage rate of plastic products refers to the percentage reduction in the room-temperature dimensions of a plastic part after it is removed from the mold and cooled to room temperature, relative to its original uncooled dimensions.
Since shrinkage is not solely due to the thermal expansion and contraction of the resin itself but also depends on various molding factors, the shrinkage rate of the plastic part after molding is termed the molding shrinkage rate.
PC Series Molding Shrinkage Rate
Name and Description Molding Shrinkage Rate % Remarks
10% Glass Fiber Reinforced PC 0.3-0.5 PCG10
20% Glass Fiber Reinforced PC 0.3-0.5 PCG20
25% Glass Fiber Reinforced PC 0.2-0.4 PCG25
30% Glass-Fiber Reinforced PC 0.2-0.4 PCG30
20% Glass-Fiber Reinforced Flame-Retardant PC 0.2-0.4 Z-PCG20
25% Glass-Fiber Reinforced Flame-Retardant PC 0.2-0.4 Z-PCG25
30% Glass-Fiber Reinforced Flame-Retardant PC 0.2-0.4 Z-PCG30
20% Glass Fiber Reinforced Halogen-Free Flame Retardant PC 0.2-0.4 Z-PCG20
30% Glass Fiber Reinforced Halogen-Free Flame Retardant PC 0.1-0.3 Z-PCG30
20% Glass Bead Filled PC 0.3-0.6 PCM20
PC/ABS Series Molding Shrinkage Rate
Name and Description Molding Shrinkage Rate % Remarks
20% Glass-Fiber Reinforced PC/ABS 0.2-0.4 PC/ABSG20
Brominated Flame Retardant PC/ABS 0.3-0.6 Z-PC/ABS
Halogen-Free Flame Retardant PC/ABS 0.4-0.7 Z-PC/ABS
Weather-Resistant Grade PC/ABS 0.4-0.7 PC/ABS
35% PC 0.4-0.6 PC/ABS
65% PC 0.4-0.7 PC/ABS
85% PC 0.4-0.7 PC/ABS
PC/PBT Series Molding Shrinkage Rate
Name and Description Molding Shrinkage Rate % Remarks
10% Glass Fiber Reinforced PC/PBT 0.5-0.8 PC/PBTG10
20% Glass Fiber Reinforced PC/PBT 0.4-0.6 PC/PBTG20
30% Glass-Fiber Reinforced PC/PBT 0.3-0.5 PC/PBTG30
30% Glass-Fiber Reinforced Flame-Retardant High-Heat-Resistant PC/PBT 0.3-0.5 Z-PC/PBTG30
High-Impact High-Heat-Resistant PC/PBT 0.6-1.0 PC/PBT
ABS Series Molding Shrinkage Factors Affecting Plastic Product Shrinkage
Name and Description Molding Shrinkage % Remarks
20% Glass-Fiber Reinforced ABS 0.2-0.4 ABSG20
25% Glass-Fiber Reinforced ABS 0.2-0.4 ABSG25
30% Glass-Fiber Reinforced ABS 0.1-0.3 ABSG30
20% Glass-Fiber Reinforced Flame-Retardant ABS 0.1-0.3 Z-ABSG20
General Flame-Retardant Grade ABS 0.4-0.7 Z-ABS
General Injection Molding Grade ABS 0.4-0.7 ABS
Weather-Resistant Grade ABS 0.4-0.7 ABS
PP Series Molding Shrinkage Rates
Name and Description Molding Shrinkage Rate % Remarks
20% Talc-Filled PP 1.0-1.5 PPM20
30% Talc-Filled PP 0.8-1.2 PPM30
40% Talc-Filled PP 0.8-1.0 PPM40
20% Talc-Filled Toughened PP 1.0-1.2 PPM20
20% Calcium Carbonate-Filled PP 1.2-1.6 PPM20
10% Glass Fiber Reinforced PP 0.7-1.0 PPG10
20% Glass Fiber Reinforced PP 0.5-0.8 PPG20
30% Glass Fiber Reinforced PP 0.4-0.7 PPG30
20% Glass Bead Filled PP 1.2-1.6 PPM20
30% Glass Bead Filled PP 1.0-1.2 PPM20
Brominated Flame Retardant Grade PP 1.5-1.8 PP
Halogen-free flame-retardant PP 1.3-1.6 PP
High-flow, high-rigidity PP 1.5-2.0 PP
General impact-modified PP 1.5-2.0 PP
Medium impact-modified PP 1.4-1.9 PP
Super impact-modified PP 1.3-1.8 PP
Heat-resistant aging PP1 1.5-2.0 PP1
Heat-resistant aging PP2 1.5-2.0 PP2
Heat-resistant aging PP3 1.5-2.0 PP3
Impact-resistant weathering PP4 1.5-2.0 PP4
High impact-resistant weathering PP5 1.5-1.8 PP5
20% Talc-Filled PP6 1.0-1.2 PP6
30% Talc-Filled PP7 0.9-1.1 PP7
40% Talc-Filled PP8 0.8-1.0 PP8
PA6 Series Molding Shrinkage Rates
Name and Description Molding Shrinkage Rate % Remarks
15% Glass Fiber Reinforced PA6 0.5-0.8 PA6G15
20% Glass Fiber Reinforced PA6 0.4-0.6 PA6G20
30% Glass Fiber Reinforced PA6 0.3-0.5 PA6G30
40% Glass-Fiber Reinforced PA6 0.1-0.3 PA6G40
50% Glass-Fiber Reinforced PA6 0.1-0.3 PA6G50
25% Glass-Fiber Reinforced Flame-Retardant PA6 0.2-0.4 Z-PA6G25
30% Glass-Fiber Reinforced Flame-Retardant PA6 0.2-0.4 Z-PA6G30
30% Glass Fiber Reinforced Halogen-Free Flame Retardant PA6 0.2-0.4 Z-PA6G30
Halogen-Free Flame Retardant PA6 0.8-1.2 Z-PA6
30% Mineral Filled Halogen-Free Flame Retardant PA6 0.5-0.8 Z-PA6M30
30% glass microsphere-filled PA6 0.8-1.2 PA6M30
30% glass fiber-mineral composite-filled PA6 0.3-0.5 PA6M30
40% Glass Fiber Mineral Composite Filled PA6 0.2-0.5 PA6M40
30% Mineral Filled PA6 0.6-0.9 PA6M30
40% Mineral Filled PA6 0.4-0.7 PA6M40
PA6 General Injection Grade 1.4-1.8 PA6
PA6 Rapid Prototyping 1.2-1.6 PA6
PA6 General Impact Modifier 1.0-1.5 PA6
PA6 Medium Impact Modifier 0.9-1.3 PA6
PA6 Ultra Impact Modifier 0.9-1.3 PA6
MoS2 Filled Wear-Resistant PA6 1.0-1.4 PA6
PA66 Series Molding Shrinkage Rates
Name and Description Molding Shrinkage Rate % Remarks
15% Glass Fiber Reinforced PA66 0.6-0.9 PA66G15
20% Glass Fiber Reinforced PA66 0.5-0.8 PA66G20
25% Glass-Fiber Reinforced Oil-Resistant PA66 0.4-0.7 PA66G25
30% Glass-Fiber Reinforced PA66 0.4-0.7 PA66G30
30% Glass-Fiber Reinforced Hydrolysis-Resistant PA66 0.3-0.6 PA66G30
40% Glass Fiber Reinforced PA66 0.2-0.5 PA66G40
50% Glass Fiber Reinforced PA66 0.1-0.3 PA66G50
25% Glass Fiber Reinforced Flame Retardant PA66 0.2-0.4 Z-PA66G25
30% Glass Fiber Reinforced Flame Retardant PA66 0.2-0.4 Z-PA66G30
30% Mineral Filled Halogen-Free Flame Retardant PA66 0.2-0.4 PA66M30
Halogen-Free Flame Retardant PA66 0.8-1.2 Z-PA66
30% Mineral-Filled Halogen-Free Flame-Retardant PA66 0.4-0.7 Z-PA66M30
30% Glass Bead-Filled PA66 0.8-1.2 PA66M30
30% Glass Fiber/Mineral Composite-Filled PA66 0.2-0.5 PA66M30
30% Mineral-Filled PA66 0.6-0.9 PA66M30
40% Mineral-Filled PA66 0.4-0.7 PA66M40
General Injection Molding Grade PA66 1.5-1.8 PA66
Rapid Prototyping PA66 1.5-1.8 PA66
General Impact-Modified PA66 1.2-1.7 PA66
Medium Impact-Modified PA66 1.2-1.6 PA66
High Impact-Modified PA66 1.2-1.6 PA66
MoS2-Filled Wear-Resistant PA66 1.2-1.6 PA66
Conclusion
Accurate knowledge of molding shrinkage rates for various plastics and reinforced materials is vital for optimizing injection molding processes.
By accounting for material type, filler content, flame retardancy, and glass fiber or mineral reinforcement, manufacturers can better predict dimensional changes, improve mold design, and achieve consistent part quality.
Leveraging these shrinkage benchmarks across PC, ABS, PP, and PA series plastics ensures enhanced production efficiency, reduces trial-and-error adjustments, and supports the fabrication of high-precision, durable plastic components for diverse industrial applications.