I have the task of building pupa boxes for over wintering insect
cocoons and chrysalides. The boxes measure ~18"x~18"x36" tall. The
side panels will be of fibreglass screen. Built one and used battens
and staples to hold the screen - don't care for it. I would like to
use standard vinyl screen spline for others. Don't want to spend a
hunk of changes on this either, so it has to be done with tools on
hand. This includes a spline tool and a 1/8" router bit.
Never having cut splines for a screen, and not having an example to
study, I'm assuming the groove for the spline is a standard 1/8" wide
(for .120" spline) groove with straight sides, about 3/16" deep.
Or does the screen spline groove have a special shape?
Google didn't turn up much in the 'dimensions' department...
Sorry -- watch for wrap on that one. I googled on screen spline
dimensions - about the 4th link down.
Here's the relevant quote: (they are making wooden frames)
8. Clamp frame securely to a work surface, and use the router to cut a
groove for the frame spline around the perimeter of the frame. Adjust
router to go a quarter-of-an-inch deep, and use a bit that corresponds
with the size of the spline being used to anchor the screen in the
This matches my recollection of making some aluminum screens for windows
-- the channel for the spline was just a rectangle in cross section - no
specific shape. The ribs in the spline hold it in place.
That's the one. Spline grips on the sides. You may want a touch wider
groove to try and pack two thicknesses of fiberglass screen and the spline.
I used a 1/4 bit and the 3/16 for the ones on the food stand, if memory
Butterflies are a great project. Friend of mine bought caterpillars every
spring for her first grade. Kids fed them, watched them through the entire
metamorphosis, then took them on a picnic and released them.
Guess I'll have to see what spline diameters are available locally
before finishing this - and try a test fit or two. I don't want to
have to buy new router bits just for this project - the _real_ router
bit store is very far away, and we don't want to wait on UPS.
BTW, here are some past lep projects that were documented.
(Clicking the insect picture brings up a new page.)
Complete life cycles - from eggs to adults, and back to eggs.
Pages are out of date, perhaps we'll have time this winter to update.
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