DE202009017409U1 - Combination special drill for wood fiber insulation board façade bores - Google Patents

Abstract

Step drill for concrete / masonry fiberboard characterized in that the drill has two or more, different drill stages, each with different bore diameter, the second stage has a cutting geometry (cutting and clearance angle), Flächenanfräsung and a depth limiter.

Description

at private and public Building, Having the energy-saving exterior facades, it is up to date economically justified the facade later Efficient with thermal insulation panels to isolate.

For this represents the industry diverse Materials available (Example: Styrofoam, wood fiber, rock wool, polystyrene hard foam, cork).

In chose my case I use the wood fiber board, which in my opinion have the best insulation values.

At the Attaching these fiberboard panels to the facade is done first with glued to a diffusion adhesive and after the drying time additionally with Dowels attached.

For this It is standard, the insulation board with a stone drill (in length and diameter dependent from the chosen one Generic type) to pierce, and in the same operation the dowel hole to drill into the facade before getting the drill out of the borehole draws.

A Piercing wood fiber board with a stone drill inserts unsatisfactory result, since the hard metal plate of a stone drill the Fiber not cutting, but displaced pierced.

At the Pulling out the drill, the well and the, for the masonry certain, dowels let yourself difficult through the narrowed drill hole in the facade bore turn to finally in a further operation, the appropriate Screw in, which ultimately secure fixation the fiberboard at the original Facade wall granted.

At the piercing the fiberboard will be the last millimeter of the Fiber board through the hard metal plate of the stone drill wood fiber so displaced, that the hard metal plate of the drill when pulling out even more fiber material draws into the borehole and additionally narrows the borehole.

All Craftsmen bear the risk that the dowel to be collected breaks off, before reaching the masonry of the facade. Now, in the intermediate work the dowel only to be removed again and the bore of the fiberboard be enlarged by elaborate re-drilling.

This nerve-wracking and time-consuming drilling of the dowel holes let the spirit awaken in me and I came thus to the invention a special combination drill of both wood fiber boards (material A) as well as concrete / masonry (material B) drills optimally in a Bohrarbeitsgang.

Consequently is the problem described above and still exists today now completely eliminated (no kinking of the dowels, no time-consuming re-drilling).

A great gratitude will be expected of all who are constantly these Need to perform work.

again to mention is the cost savings due to the lower consumption of special dowels, as well the time / cost saving of re-drilling.

- Solution:

A special drill that is capable of optimally handling two different materials in one operation - both wood fiber boards with a desired drilling diameter Cutting (wood drill quality)
as well as the façade wall of concrete or masonry in the required dowel diameter impact drilling (stone drill quality)
so can pierce, so that through the two different holes the designated fixing dowel can be driven without kinking and without exerting force.

- Description of the drill:

Two-step drill / two Material drills (concrete / masonry) for standard dowel dimensions 8 mm and simultaneously cutting wood drill (wood fiber drill) with 11 mm diameter with a surface milling of 4 mm width and 2 mm depth for fixing the depth limiter which can be exchanged in different lengths.

Claims (6)

Step drill for concrete / masonry fiberboard characterized in that the drill has two or more, different drill stages, each with different bore diameter, the second stage has a cutting geometry (cutting and clearance angle), Flächenanfräsung and a depth limiter. Step drill according to protection claim 1, characterized in that the lengths of the first drilling step after the required minimum drilling depth of the anchor (manufacturer data) and the diameter of the first drilling step according to the diameter of the Dü bels (manufacturer data). However, this does not necessarily have to be the case. Step drill according to protection claim 1, characterized the cutting edge (S1) of the second drilling step is oriented 45 ° to the drilling axis are. However, this does not necessarily have to be the case. Step drill according to protection claim 1, characterized that is the length the second drilling stage according to the wood fiber board thickness and the diameter of the second drilling step after the dowel (manufacturer data) can. However, this does not necessarily have to be the case. Step drill according to protection claim 1, characterized that the position, length and the width of the Flächenanfräsung on the second drilling stage can be based on the claimant protection. Step drill according to protection claim 1, characterized that the position, the length and the diameter of the depth limiter after the protection claimant can judge.