Injection moulding is a versatile manufacturing process used to create a variety of products across industries. Despite its efficiency, it is susceptible to several defects that can impact product quality and production efficiency. Understanding these common defects and their causes is crucial for maintaining high-quality standards in injection moulding processes.
Sink marks are depressions on the injection moulded part's surface caused by the shrinkage of material during the cooling process. Common causes include inadequate packing of material, improper cooling, and excessive melt temperature. Proper gate design and material selection can help alleviate this issue.
Warping occurs when there is non-uniform cooling of the part after ejection from the mould, leading to dimensional distortions. Factors such as part design, mould temperature, and cooling rate influence warping. Implementing uniform cooling strategies and optimizing part geometry can mitigate warping defects.
Short shots happen when the mould doesn't completely fill with material, resulting in incomplete parts. Causes include insufficient injection pressure, incorrect temperature settings, or blocked vents. To prevent short shots, ensure proper machine calibration, optimize processing parameters, and maintain mould cleanliness.
If you need custom machined parts with complex geometries, or get end-use products in the shortest possible time, sigma technik limited is good enough to break through all of that and achieve your idea immediately.
Equipped with 3-4-5 axis CNC milling and CNC turning machines, which enable us to handle even more complex parts with high precision.
Low investment, fast lead time, perfect for your start-up business.
Our talented sheet metal engineers and skilled craftsmen work together to provide high quality custom metal products.
We offer SLA/SLS technologies to transform your 3D files into physical parts.
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Sigma Technik Limited, as a prototype production company and rapid manufacturer focusing on rapid prototyping and low volume production of plastic and metal parts, has advanced manufacturing technology, one-stop service, diversified manufacturing methods, on-demand manufacturing services and efficient manufacturing processes, which can provide customers with high-quality, efficient and customized product manufacturing services and help customers improve product quality and market competitiveness.
CNC machining is a versatile manufacturing technology that can be used for a wide range of applications. Common examples include components for the aerospace, automotive, medical industries and etc.
Automotive components
Aerospace components
Medical components
Metal and plastic processing
Clear optical prototype for CNC machining
Get the support you need on CNC machining and engineering information by reading the FAQ here.
It may be caused by unstable processing equipment or tool wear and other reasons, so it is necessary to check the equipment and tools in time and repair or replace them.
It may be due to severe wear of cutting tools or inappropriate cutting parameters, which require timely replacement or adjustment of cutting tools or adjustment of machining parameters.
It may be caused by programming errors, program transmission errors, or programming parameter settings, and it is necessary to check and modify the program in a timely manner.
It may be due to equipment imbalance or unstable cutting tools during the processing, and timely adjustment of equipment and tools is necessary.
The quality and usage method of cutting fluid can affect the surface quality of parts and tool life. It is necessary to choose a suitable cutting fluid based on the processing materials and cutting conditions, and use it according to the instructions.
It may be due to residual stress in the material and thermal deformation during processing, and it is necessary to consider the compatibility between the material and processing technology to reduce part deformation.
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