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Oct 16, 2021
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How to make a device for cutting a corner groove of a foam joint

Polyfoam, expanded polystyrene and polystyrene foam with a milled quarter allows you to do the joining of sheets without cold bridges, getting a single rigid plane. However, when trimming, we remove the quarters, so the trimmed pieces are no longer suitable. Having made a cutter of the proposed design, you can cut a quarter on the scraps, thus using them without a trace.

How to make a device for cutting a corner groove of a foam joint

Materials:

  • Plywood or MDF;
  • self-tapping screws for wood;
  • joiner’s glue;
  • blades for a mounting knife – 2 pcs.

All kinds of cutters on Aliexpress with a discount – http://alii.pub/612ag8

Cutter manufacturing process

For the manufacture of the device, you will need to select plywood or other material, the thickness of which is equal to half the section of the sheet of the existing foam or polystyrene foam. Then you need to cut 3 blanks 200 mm long and 100, 60 and 40 mm wide.

How to make a device for cutting a corner groove of a penoplex joint

First we make the widest one, and cut it under the trapezoid. Only you need to cut not from the corner, but with an offset of 10 mm to get a hexagon.

How to make a device for cutting a corner groove of a foam joint

On the second piece, 60 mm wide, a longitudinal line should be marked. It is drawn with an indent from the edge by half the thickness of expanded polystyrene and polystyrene foam. We put a large blank on it along the mark, and mark the corners along the edges in order to cut them off.

How to make a device for cutting a corner groove of a foam joint

We also apply a large one on a narrow workpiece, equal it at the beginning of the oblique ribs. Then we mark along them, and cut off the corners. We sand the details so that they are smooth.

How to make a device for cutting a corner groove of a foam joint

The large and medium blanks need to be connected, aligning along the wound of the line made. Lubricate them with glue, and tighten them with self-tapping screws.

How to make a device for cutting a corner groove of a foam joint
How to make a device for cutting a corner groove of a foam joint

A narrow strip is required to be screwed on the side of the formed quarter. Be sure to drill before this, so as not to split the part.

How to make a device for cutting a corner groove of a foam joint

Now you need to screw 2 blades onto the cutter body. Each is fixed with three self-tapping screws with a wide head. The blades are at an acute angle.

How to make a device for cutting a corner groove of a foam joint

We apply the resulting cutter to the foam or expanded polystyrene, and cut a quarter away from us. Everything is done very easily in one pass. When the cutter is dull, change the blades and it will cut like clockwork again.

How to make a device for cutting a corner groove of a foam joint
How to make a device for cutting a corner groove of a foam joint

Watch the video

Warming of floors with penoplex and OSB sheets – https://sdelaysam-svoimirukami.ru/5338-uteplenie-polov-penopleksom-i-listami-osb.html

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