Jim R
SMF Supporter
Hi all
For my HMS Rodney build I needed to make resin castings to provide extra cargo freighters. I thought a simple "how to" may be of help to some people. I must confess here and now that most of my resin casting knowledge comes from Simon T who helped me no end a few years ago when I first had a go at casting.
This is what I wanted more of. From a set of 1/700 harbour boats.
![330786 330786](https://www.scale-models.co.uk/data/attachments/198/198855-7ddf577b94d4984e620ddb63c3a8c43d.jpg)
For casting you need to provide a casting block on the base. It will be sanded off the copies.
![330787 330787](https://www.scale-models.co.uk/data/attachments/198/198856-a65ea5db141e6011d3935c8d8284331c.jpg)
I make a suitable sized box using that waterproof card from milk or smoothie cartons. I stick it together with a cheap hot glue gun.
![330788 330788](https://www.scale-models.co.uk/data/attachments/198/198857-2a8c9f4ce26f23073bac40260c6f50f4.jpg)
![330789 330789](https://www.scale-models.co.uk/data/attachments/198/198858-2885628011dccb272bb2b9dc924a5787.jpg)
The original is stuck to the base of the box with double sided tape.
![330790 330790](https://www.scale-models.co.uk/data/attachments/198/198859-5d1f82d89ad2bf015c7b045175ecf71d.jpg)
The rubber for the mould is mixed by weight. I part catalyst to 20 parts rubber.
![330793 330793](https://www.scale-models.co.uk/data/attachments/198/198862-053c56d7644b1d9090689c824139b4d2.jpg)
![330792 330792](https://www.scale-models.co.uk/data/attachments/198/198861-7fd50000bd99ea979830e696f6595236.jpg)
Stir well. you have plenty of time as the rubber is slow to cure.
I use a scale to weigh out the rubber and catalyst.
![330794 330794](https://www.scale-models.co.uk/data/attachments/198/198863-f8479fbdf5d2c00eb7a3eee009f4c930.jpg)
Pour the rubber into the mould slowly and use a coffee stirrer or similar to gently prod around to dislodge air bubbles.
![330791 330791](https://www.scale-models.co.uk/data/attachments/198/198860-70d9c81291a6c9fd974bcb522481b9d0.jpg)
It says that the rubber will cure in between 8 and 24 hours. I leave it for the full 24 hours. I then cut down each corner of the card box to release the mould.
![330795 330795](https://www.scale-models.co.uk/data/attachments/198/198864-25e62786fd725bba77cb5b0fc067e20f.jpg)
This is what you get. Carfully wiggle out the master.
![330796 330796](https://www.scale-models.co.uk/data/attachments/198/198865-b50680a29346f0ca9e7fcbcd0bc2f085.jpg)
The resin I use has two parts. Mix 50/50 by weight. Now the resin, once mixed goes off quickly so don't hang about. Stir well but gently to avoid air bubbles as much as possible.
![330797 330797](https://www.scale-models.co.uk/data/attachments/198/198866-e2b86aaf1002bc5f923d212d8b52e96a.jpg)
Pour the resin into the mould and have a good prod around to try to get the resin into all the corners etc of the mould.
![330798 330798](https://www.scale-models.co.uk/data/attachments/198/198867-01fb303a2dbc746cd67c8615b8b7d0bd.jpg)
Leave for an hour or so and wiggle the casting from the mould and hey-presto - then there were two!![Hungry :hungry: :hungry:](/smiles/Hungry.png)
![330799 330799](https://www.scale-models.co.uk/data/attachments/198/198868-08258ab000778e86b9b67ea92c29f4eb.jpg)
I hope this may be of use to some people who haven't tried resin casting before.
NOTE - It is perfectly OK to make copies for your own use but you must not sell them.
Jim
For my HMS Rodney build I needed to make resin castings to provide extra cargo freighters. I thought a simple "how to" may be of help to some people. I must confess here and now that most of my resin casting knowledge comes from Simon T who helped me no end a few years ago when I first had a go at casting.
This is what I wanted more of. From a set of 1/700 harbour boats.
![330786 330786](https://www.scale-models.co.uk/data/attachments/198/198855-7ddf577b94d4984e620ddb63c3a8c43d.jpg)
For casting you need to provide a casting block on the base. It will be sanded off the copies.
![330787 330787](https://www.scale-models.co.uk/data/attachments/198/198856-a65ea5db141e6011d3935c8d8284331c.jpg)
I make a suitable sized box using that waterproof card from milk or smoothie cartons. I stick it together with a cheap hot glue gun.
![330788 330788](https://www.scale-models.co.uk/data/attachments/198/198857-2a8c9f4ce26f23073bac40260c6f50f4.jpg)
![330789 330789](https://www.scale-models.co.uk/data/attachments/198/198858-2885628011dccb272bb2b9dc924a5787.jpg)
The original is stuck to the base of the box with double sided tape.
![330790 330790](https://www.scale-models.co.uk/data/attachments/198/198859-5d1f82d89ad2bf015c7b045175ecf71d.jpg)
The rubber for the mould is mixed by weight. I part catalyst to 20 parts rubber.
![330793 330793](https://www.scale-models.co.uk/data/attachments/198/198862-053c56d7644b1d9090689c824139b4d2.jpg)
![330792 330792](https://www.scale-models.co.uk/data/attachments/198/198861-7fd50000bd99ea979830e696f6595236.jpg)
Stir well. you have plenty of time as the rubber is slow to cure.
I use a scale to weigh out the rubber and catalyst.
![330794 330794](https://www.scale-models.co.uk/data/attachments/198/198863-f8479fbdf5d2c00eb7a3eee009f4c930.jpg)
Pour the rubber into the mould slowly and use a coffee stirrer or similar to gently prod around to dislodge air bubbles.
![330791 330791](https://www.scale-models.co.uk/data/attachments/198/198860-70d9c81291a6c9fd974bcb522481b9d0.jpg)
It says that the rubber will cure in between 8 and 24 hours. I leave it for the full 24 hours. I then cut down each corner of the card box to release the mould.
![330795 330795](https://www.scale-models.co.uk/data/attachments/198/198864-25e62786fd725bba77cb5b0fc067e20f.jpg)
This is what you get. Carfully wiggle out the master.
![330796 330796](https://www.scale-models.co.uk/data/attachments/198/198865-b50680a29346f0ca9e7fcbcd0bc2f085.jpg)
The resin I use has two parts. Mix 50/50 by weight. Now the resin, once mixed goes off quickly so don't hang about. Stir well but gently to avoid air bubbles as much as possible.
![330797 330797](https://www.scale-models.co.uk/data/attachments/198/198866-e2b86aaf1002bc5f923d212d8b52e96a.jpg)
Pour the resin into the mould and have a good prod around to try to get the resin into all the corners etc of the mould.
![330798 330798](https://www.scale-models.co.uk/data/attachments/198/198867-01fb303a2dbc746cd67c8615b8b7d0bd.jpg)
Leave for an hour or so and wiggle the casting from the mould and hey-presto - then there were two!
![Hungry :hungry: :hungry:](/smiles/Hungry.png)
![330799 330799](https://www.scale-models.co.uk/data/attachments/198/198868-08258ab000778e86b9b67ea92c29f4eb.jpg)
I hope this may be of use to some people who haven't tried resin casting before.
NOTE - It is perfectly OK to make copies for your own use but you must not sell them.
Jim