In this case, adjusting the shrinkage does not solve the problem. The structure of such products determines the way and result of shrinkage. No matter how you adjust the shrinkage rate, this problem will always appear. In fact, it is deformed in the process of contraction, and the feet bend at the bifurcation, which leads to the head moving closer to the inside and the size becoming smaller. Your measurement of its root size is actually in line with the requirements.

To solve this problem, it is best to modify the product structure, which is obviously unrealistic for sub-processing. We can consider connecting the head, and when it shrinks by 80-90% (let it stand at room temperature for a day or two), the connecting part will be scrapped. This will increase the cost, so we have to do it. The most ideal method is that we design the two feet of the head to deviate from a corresponding angle in advance, and of course, the mold puts a unified shrinkage rate in the shrinkage deformation to offset the deformation angle.

Of course, there are other strange methods, but they are not necessarily desirable or realistic. Such as fixture fixation, hot water immersion, etc. No matter what method is used, we must first make sure that the injection molding process is possible.

I am a professional designer. I can modify your product drawings according to your product deviation, and I can also test the accuracy of your products, but there is a charge. (Interested contact: yingxiangdesign@ 163.com)