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Post by cravenbiker on Apr 5, 2020 7:09:06 GMT -5
Hi there
so, i need to make a mould of a water housing port which is basically a cylinder with an external thread at one end and a seating for a class disc or lens at the other end. this will screw on a housing for a dslr camera and will house the lens of the camera. what i wish to do is be able to extend the mould by cutting the two ends off and putting another cylindrcal mould between the two pieces to connect them thus allowing the length of the lens to be increased. what cant quite work out is a way of dong this withought damaging the orignal piece to be moulded. has anyone got any ideas or can anyone guide me in the directon of any instructons to create something like this? plan to use a silcon mould and pour with Polyurethane resin eventually
my man concern is creating something that would be relatively accurately constructed so the lens would be parallel to the port\port lens.
thank you and sorry if my description is not clear
thank you Tristan
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Post by notoes on Apr 5, 2020 11:35:59 GMT -5
Can you attach a picture of what you're molding? I'm pretty certain silicone won't damage the original piece but I'm not exactly sure I'm getting a good idea of what you are trying to make so I'm not sure how to best help you on how to make a mold of it.
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Post by Brian on Apr 5, 2020 11:40:56 GMT -5
.....Here's what I have done with similar situations in the past ...i.e the original needs to be modified with out causing any damage at all to the original. 1) Make a new original by molding/casting the piece that you have. The original remains as it is and you now have a new piece to work with. 2) Since you now have a mold and a copy of the original, you can modify the copy as needed and also pour more pieces if needed to facilitate what is needed to complete your project. I use CA (Cyanoacrylate) glue when attaching my resin parts and pieces. Brands such as Gorilla Super Glue, Loctite, etc. are available at your favorite hardware or home improvement stores. And, since hardware and home improvement stores have been deemed essential businesses during the china flu, you should have no issue at all picking up some if you don't already have any. |
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Post by cravenbiker on Apr 5, 2020 15:06:48 GMT -5
hey Guys, did actually think of that a couple of hours ago, make a donor peice and then chop that up and make my final mould from using the pecies of that. i think from looking through various sources available on the internet that that is the only option. obviously will involve a bit or precison cut and stitchng like you said but im sure that would be fine using the right glue and resin to fill the gaps. and it will be a lot more robust that trying to stitch peices of silcon mould together. i think that you have confirmed my answer. thank you very much for your time.
Tristan
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