What causes deformation during medical mould injection molding? Given the precision nature of medical moulds, it's crucial to capture all dimensions accurately and prevent excessive mould movement. For medical mould engineers, precise control over the dimensions of injection-molded parts and moulds is vital, guided by design drawings, production techniques, and molding technology. Additionally, appropriate shrinkage rates must be considered, taking into account the chosen materials and their varying shrinkage rates compared to others. For precision moulds, minimizing the difference between predicted and actual shrinkage is essential, placing stricter demands on designers. In summary, designing a medical mould without errors and avoiding deformation is challenging for non-technical personnel. So, how do we address such deformation issues?

Firstly, through analysis, it's clear that addressing deformation in medical mould injection molding cannot be solved solely by modifying equipment. The problem primarily lies in the design and control of the mould structure. Summarizing the main causes of deformation, the solutions include:

1. When deformation is caused by injection molding conditions, reduce injection pressure, increase mould temperature for uniform heating, raise resin temperature, or use annealing to reduce stress.

2. For deformation due to poor ejection practices, increase the number or total area of ejector pins, adjust ejection angles, etc.

3. For uneven cooling or insufficient cooling time, optimize the cooling mode and extend cooling time. Positioning the cooling circuit as close as possible to the deformation area can also improve the situation.

4. Considering deformation caused by moulding shrinkage during medical mould injection, it's necessary to adjust the mould design. Ensuring consistent product wall thickness is crucial. If necessary, the mould must be corrected in the opposite direction based on measured part deformation.