Tuesday 24 June 2008

The final model.






Gorgeous.

Rivet and rivet nib





To make the rivet to join the scissors together, I hammered an aluminium pole to create the exact same rivet but double the size.






Original rivet next to my hand made rivet, apologies for the poor quality photo.

It worked alot better than I expected it to. I finished off the rivet with wet or dry paper.



The original nib for the end of the rivet, I made one from wood and then sprayed it black.

Taking off the masking tape.




Second time lucky with spraying. All scratches have gone.


Moment of truth, taking off the masking tape.



There were only some minor leaks through the masking tape, caused by the different pieces of tape overlapping. The small black leaks were sanded off.

Spraying the handles



I covered off the areas that needed to stay yellow with masking tape prior to spraying.


I used black satin spray on the handles.



However, once the paint had set I wasn't completely satisfied with the finish. There were still some noticable scratches from sanding it down on the handles. I sanded off the paint then used an even finer wet or dry paper to remove the last of the scratches.

Gluing




I filled any gaps from the join of the resin with araldite. I then finely sanded down the resin so it was ready to spray.




Clamped tight in the vice for the glue to set.

The resin cast handles.



Sadly, this was the only way I could persuade the resin to leave the mould.



The casting process worked really well dispite losing the mould.





Resin casting


I cut out and attached my moulds to a scrap piece of wood so they stayed flat when I poured the resin.


I had to cover a small part of the mould with masking tape incase the resin decided to leak. This was where the plastic became quite thin from the vacuum forming stage, also due to the sharp corner slight webbing occured. Thankfully the resin did not decide to leak.



Left the resin to set overnight after pouring.

Vacuum formed mould.

I could have easily finished up the wood and sprayed it to replicate the scissors but I wanted to experiment with resin casting. I chose to vacuum form the wooden moulds (what they were intended for) to create a female mould suitable for pouring the resin into.







I chose to make the resin mould include space for the blades. This meant after I poured the resin the blades would be stuck to the handles permanently and it would give a nice clean join.

Blades in the wooden mould




The blades fit into the handles perfectly.


Starting to look more like the final piece, but still got a long way to go.

Making the blades fit the wooden mould.




I used the router to make the slots to fit the blades in to each handle.

Making moulds for the handles

I decided to make MDF moulds to vacuum form over. This giving me a mould to pour resin into to create my plastic scissor handles.




I started off cutting out the basic shape of the handles.




My scaled up wooden mould next to the original scissors.



The wooden moulds ready to be vacuum formed.

Making the blades


This was one of the first stages I went through making the blades, cutting out the basic outline using the bandsaw.

I then cut away most of the waste from the cutting edge and used a series of files to replicate the two cutting edges on each blade.

Drilling the holes for the joining rivet to make sure they are the same size when joint together.



The final cutting edge.