The ratio is called the mold shrinkage ratio. For example, if the shrinkage ratio of ABS is 4/1000 to 9/1000, it means that an overall length of 1000 mm will shrink by 4 to 9 mm.
Therefore, when creating a mold, it is necessary to make it larger than the dimensions of the product.
In other words, if you want to make a 1000 mm molded product from ABS, you need to design the mold size to 1004 mm to 1009 mm.
Nevertheless, actual molding may or may not shrink more than expected depending on the fiber orientation and molding conditions.
So, before actually making a mold, it is necessary to measure the shrinkage rate of the resin to be used with a test piece or other molded product to obtain the shrinkage rate of the resin to be used.
We can acquire shrinkage measurement data more committed to the molding site by using a dedicated shrinkage measurement flat plate to perform the entire process from molding to measurement.
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