How to get curved walls of small irregular dish.

[supertom44]

I want to make the below, it's a dosing tray to weigh and transfer coffee beans.

The bowl bit I'm fine with I can make a template and route out the inside.

The bit I can't figure out is how to make the sides curve down to the base.

Only way I can think is to use a bandsaw and make a serious of angled cuts then sand smooth, or use a hand plane and plane the corners down.

Is there an easier way?

 

[Stigmorgan]

If you have a lathe you could do the 3 corners first then route the inside and finally plane the outside to match the corners

 

[Stigmorgan]

If you have a lathe you could do the 3 corners first then route the inside and finally plane the outside to match the corners

 

[Dee J]

There's many ways, but a flap wheel in an angle grinder will soon get that to shape. Even quicker if you can get the basic shape in flat surfaces with a bandsaw first.

 

[supertom44]

If you have a lathe you could do the 3 corners first then route the inside and finally plane the outside to match the corners

Interesting I hadn't considered the lathe due to the triangluar shape, well that and the fact that I suck at using the lathe haha.

 

[supertom44]

There's many ways, but a flap wheel in an angle grinder will soon get that to shape. Even quicker if you can get the basic shape in flat surfaces with a bandsaw first.

Hmmm I might look into treating myself to an angle grinder for xmas.

 

[Stigmorgan]

Interesting I hadn't considered the lathe due to the triangluar shape, well that and the fact that I suck at using the lathe haha.

Shame you're so far away, I'd say come over and we could try it out.

 

[--Tom--]

Saw close to shape, then a coarse rasp, then a finer rasp or file and finally sand smooth.
The Shinto rasps work well and are reasonable.

 

[Graham F]

I use one of these: Axcaliber Dish Carving Cutter

 

[johnkiatt]

I'll second the "Shinto" rasps. They have a coarse side for removing material quickly and a finer side for smoothing.
see here: Shinto

 

[Richard_C]

Assume you are starting with a rectangular pieces, work it out and cut the spout-like curve at the front on the Bandsaw while it's still rectangular so easy to control. Then cut the rest. ( I've been making coffee and grinding beans for 15 years and never found a need for a dosing tray)

 

[supertom44]

Assume you are starting with a rectangular pieces, work it out and cut the spout-like curve at the front on the Bandsaw while it's still rectangular so easy to control. Then cut the rest. ( I've been making coffee and grinding beans for 15 years and never found a need for a dosing tray)

Need a dosing tray, absolutely not my grinder has a dosing cup that works perfectly fine, however I thought these looked nice and wanted to have a go at making one.

 

[Jacob]

Outside:
Shape the outline precisely.
Then gauge mark faces and sides all round for two 45º bevels (with 3rd bevel left between them).
Then take off the 2 bevels with plane, spokeshave, bandsaw, whatever, precisely, so that you are in control.
Then freehand shape/sand what's left, starting by spokeshaving along the gauge lines, or arrisses.
Similar process for rounding off and shaping odd curved shapes like windsor chair arms. Getting the flat bevels spot on keeps it under control, before you start rounding off freehand.