"Dear S.Y.,
How are you? Great hearing from you. Indeed I remember your kind support in HK. I have commented
it to my team there and in my next trip to China we will for sure have a good chat while having dinner and drinks. Your kindness is such that is not very usual these days so a big thank you from me!
As for your request what your customer is requesting is for you to plan a draft reserve for a texture with 0,004 depth, with MT (Mold-Tech) reference number not yet defined. What is not clear is whether he is working in imperial or metric system and thus please make sure you confirm before proceeding.
Below the different draft recommendation for imperial and metric:
Texture depth vs draft:
1. If Imperial: 0,004 inches = 0,1 mm = aprox. 100 microns
Recommended draft in favorable shrinkage conditions:
9 degrees (1,5 degrees for natural demoulding + 1 degree per each 13 microns depth)
2. If metric: 0,004 mm = aprox. 40 microns
Recommended draft in favorable shrinkage conditions:
4,5 degrees (1,5 degrees for natural demoulding + 1 degree per each 13 microns depth)
Please check below sketch. It shows draft needs versus shrinkage conditions. If the part has a
geometry that shrinks on to the grained surfaces than our recommendation is to double the minimum recommended draft.
Hope to see you soon. All the best until then!
Paulo Vilaca, Mold-Tech, Standex Engraving Group"
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