Remedies to Bending in Injection Molded Parts
Introduction
Injection molded parts are essential components in the manufacturing industry. They come in a range of shapes and sizes to fit nearly any application. Despite the advantages of injection molded parts, they are also susceptible to bending when certain conditions are present during the injection molding process. Fortunately, there are several remedies for bending in injection molded parts. This article will discuss two of the most common remedies to bending in injection molded parts.
The First Remedy: Improve the Resin Properties
The first remedy to address bending in injection molded parts is to improve the resin properties. This can be done by either increasing the glass content or increasing the viscosity. Increasing the glass content will provide a stiffer and stronger molded part, reducing the risk of bending. Alternatively, increasing the viscosity of the resin will reduce the flow rate of the injection, resulting in a part with better regidity. However, it is important to note that increasing the glass content and viscosity also increases the cost of the injection molded part and may make them unsuitable for some applications.
The Second Remedy: Reduce Clamping Force
The second remedy to address bending in injection molded parts is to reduce the clamping force. Clamping force refers to the force applied to the mold to hold it together during the injection molding process. Excessive clamping force can cause bending in injection molded parts as the part attempts to move under pressure. To reduce the clamping force, the molds locking force must be adjusted. It is important to reduce the force gradually as not to overtax the molding machine as well as make sure that there is still enough force to keep the mold closed during the injection process.
Conclusion
Bending in injection molded parts can be a frustrating problem, but fortunately, there are several remedies to address it. The first remedy is to improve the resin properties, either by increasing the glass content or by increasing the viscosity. The second remedy is to reduce the clamping force of the mold by adjusting the locking force. Properly adjusting these remedies can help reduce or even eliminate bending in injection molded parts, ensuring that the finished product meets all specifications.
