Making a smooth mould from a grainy plastic part

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Making a smooth mould from a grainy plastic part

Making a smooth mould from a grainy plastic part

Author	Message
Jess8bit	Jess8bit posted 13 Years Ago HOT Topic Details
Group: Forum Members Posts: 133, Visits: 566	Hello, I'd like to CF-copy some automotive parts like rear diffuser, side skirts, etc. which are made of rough plastic with a grainy surface. I may not sand the surface since I've to give the part back to its owner as is. Do I need to wax the surface first ? How to polish it ? What is the process to build a glossy mould from these kind of parts, in order to build aesthetic CF parts from it ? I'd like to buy the materials from EC as soon as I know how to proceed Thank you all French guy here
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Jess8bit	Jess8bit posted 13 Years Ago HOT Post Details
Group: Forum Members Posts: 133, Visits: 566	up !
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Warren	Warren posted 13 Years Ago HOT Post Details
Group: Administrators Posts: 214, Visits: 782	spray with 2k filler primer then sand smooth and polish up.
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Jess8bit	Jess8bit posted 13 Years Ago HOT Post Details
Group: Forum Members Posts: 133, Visits: 566	Warren (11/11/2012) spray with 2k filler primer then sand smooth and polish up. Thank you Warren That's an seductive idea, but how do you restore the "filled" part after having finished ? regards, Jess
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Warren	Warren posted 13 Years Ago HOT Post Details
Group: Administrators Posts: 214, Visits: 782	ahh i missed that bit lol. use tons and tons of wax and build it up in layers until its smooth. Will take you hours and hours though.
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Jess8bit	Jess8bit posted 13 Years Ago HOT Post Details
Group: Forum Members Posts: 133, Visits: 566	Warren (13/11/2012) ahh i missed that bit lol. use tons and tons of wax and build it up in layers until its smooth. Will take you hours and hours though. ok noticed it will be long... so no need to spray any filler eventually ? thank you again Warren
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NikCFC	NikCFC posted 13 Years Ago HOT Post Details
Group: Forum Members Posts: 61, Visits: 871	Use wax and pva to ensure that the part will demold without getting damaged and then sand flat and glossy the molds.
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Jess8bit	Jess8bit posted 13 Years Ago HOT Post Details
Group: Forum Members Posts: 133, Visits: 566	NikCFC (13/11/2012) Use wax and pva to ensure that the part will demold without getting damaged and then sand flat and glossy the molds. Hey Nik thank you So it's better/simpler/faster to smooth the mould afterwards, than wasting time by working on a solution that would produce a smoother mould
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NikCFC	NikCFC posted 13 Years Ago HOT Post Details
Group: Forum Members Posts: 61, Visits: 871	Ideally the plug should have a perfect surface but because most of the times you have to return the parts in their original state it's better to mold it as it is and then sand and polish the mold.
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Jess8bit	Jess8bit posted 13 Years Ago HOT Post Details
Group: Forum Members Posts: 133, Visits: 566	NikCFC (13/11/2012) Ideally the plug should have a perfect surface but because most of the times you have to return the parts in their original state it's better to mold it as it is and then sand and polish the mold. okidoki ! regards
	Reply Like 3