General Question

Jonathan_hodgkins's avatar

How to get the most out of plastic injection mold quotes?

Asked by Jonathan_hodgkins (656points) 1 week ago

I am looking to send a bunch of files to a contract manufacturer for quoting, however the parts don’t all have the correct draft. They can all be made but there are a couple spots with zero draft.

Should I update all of these parts before I get a quote? Will the quote be better if the draft angles are more correct?

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9 Answers

Tropical_Willie's avatar

Look here ! Will not go well, my background is in sand casting.

Jonathan_hodgkins's avatar

Yes, I know it won’t work for full production but will if effect the price of the quote? I just need a approximate quote and not to have it manufacture ready.

Tropical_Willie's avatar

Why spend money on “not a good design” ? ? ?

Jonathan_hodgkins's avatar

Not spending any money, just want a quote. I want to know if the quote will be better, if draft is slightly better. Parts are designed to be plastic injected molded right now, but they aren’t perfect.

Tropical_Willie's avatar

I should have the person giving you the quote ! They have to spend money and time.

Jonathan_hodgkins's avatar

This is not wasting anyone’s time. We need to determine the approximate cost in order to refine the product and design. This is something that contract manufacturers do all the time.

Tropical_Willie's avatar

I ‘d be yelled for asking the vendor to give quote for a “napkin drawing”, if you want costs between $30,000 to $45,000 just get a verbal ballpark or e-mail rather than a quote.

Jonathan_hodgkins's avatar

These are not napkin drawings, these are engineered CAD files. I am a mechanical engineer and I know how to properly design plastic parts. I would expect that the contract manufacturer has a program that they could input the CAD files into in order to get a quote, so not that much work. I just want to know if the quote changes if they have more acceptable draft. You aren’t really answering the question.

RocketGuy's avatar

I would caveat the RFQ with a note asking them to quote on this preliminary design, and that the final design would have drafts in additional new areas. Major dimensions would remain the same. Also, you could ask them for suggestions for reducing mold cost.

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