DE2125000A1 - Injection core for injecting dowels into masonry - Google Patents

Description

^D ATE MTAM WA LTH

DIPL.-ING. GÜNTHER KOCH DR. TINO HAIBACH

8 MUNICH 2, ₁₉ . _M ai 1971 OUR SIGN: 12 9 ^ 6 -

Tox-DUbel-Werk R. Vi. Heckhau sen KG, 7762 Ludwigshafen / Bodensee Injection core for injecting dowels into masonry

The subject of the main patent No. 15 09 562 is a process for fastening objects to masonry by means of plastic dowels arranged in pre-drilled holes, in which with an injection molding gun known per se, a dowel compound made of plastic material, due to the arrangement one with the spray nozzle of the injection molding gun cooperating core achieved leaving a central, axially extending core Insert holes are injected directly onto the pre-drilled dowel hole and the fastening means after the dowel compound has solidified is inserted into the insert hole.

After the embodiment is described in the main patent the core is arranged in the spray nozzle of the injection molding gun and its shape is adapted to the shape of the fastening means, that the insertion of the fastener takes place with spreading of the dowel compound. This training with fixed on the spray gun The core enables very simple handling, but requires that the core is constantly at a high temperature during spraying is exposed and remains at this temperature.

The invention is based on the object of the dowel method To be able to use a core that is at a lower temperature. According to the invention this object is achieved

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solved that the structurally separate core from the spray gun is provided with a handle, which creates the possibility of the core within the dowel hole in the correct position hold while the spraying compound is pressed into the dowel hole using the spray gun «,

The core is expediently equipped with a core holder in the form of a plate, which is positioned above the dowel opening comes to rest and in connection with a cone adjoining downwards a favorable centering and holding of the core guaranteed when applying the spray gun. The core holder is designed to further facilitate the application of the spray gun Expediently provided on the top with a nozzle receiving recess which is adapted to the outer shape of the nozzle. According to a further embodiment of the invention, a channel or a plurality of channels essentially lead from this recess axially parallel through the cone to allow the spray compound to enter the dowel hole after the spray gun has been attached.

Because the core is separated from the spray nozzle or the spray gun, the core can move between two successive ones Cooling spray processes, which means a favorable solidification of the dowel compound and a removal of the core from the solidified Dowel compound is an advantage. If necessary, several Cores are used alternately in order to ensure adequate cooling, these cores being also different from one another Can be core shape, can be interchangeably inserted into a handle provided with a holder.

An exemplary embodiment of the invention is described below with reference to the drawing. The only figure in the drawing shows a core formed according to the invention with a spray gun nozzle inserted into a dowel hole.

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In a dowel hole 10 of the masonry 12, a core 14 designed according to the invention is inserted, which consists of the rod-shaped mandrel Ιό, a conical transition and centering cut l8 and a core holder in the form of a plate 20 to which a handle 22 is attached. The core holding plate 20 has a recess 24 coaxial with the mold core 16, the shape and size of which is adapted to the nozzle 26 of the spray gun 28. From this recess 24 a channel J> 0 leads through the conical section Lö of the core to the interior of the dowel hole, so that the injection molding compound can flow directly into the dowel hole from the nozzle 26 when it is inserted into the recess 24. Instead of the single channel JO , several channels can be arranged running essentially axially parallel.

The procedure is carried out in such a way that the The core detected on the handle 12 is inserted into the dowel hole 10, with self-centering taking place via the cone 18. Then the nozzle 2o of the spray gun is in the nozzle receiving recess 24 is used and the spraying process can proceed. The still relatively cold core can then be removed from the solidified dowel compound can be removed relatively easily.

Claims;

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BATH

Claims (5)

- 4 patent claims: [l.y injection core for carrying out the fastening method of objects on masonry by means of plastic dowels arranged in pre-drilled holes, in which with one per se known injection-molding gun an existing plastic dowel compound under due to the arrangement of a with the spray nozzle of the injection molding gun cooperating core achieved leaving a central, axially extending insert hole injected directly into the pre-drilled dowel hole and the fastening means after the dowel compound has solidified is inserted into the insert hole according to patent no. 15 09 562, characterized in that the core which is structurally separated from the spray gun (28) (14) is equipped with a handle (22). 2. Injection core according to claim 1, characterized in that the core (14) with a core holder (20) in the form of a Plate is provided on which the handle (22) attaches. 3 «injection core according to claims 1 or 2, characterized in that between the core mold (l6) and the core holder (20) a conical centering section (l8) is arranged. 4. Injection core according to Claims 1 to 3> characterized in that there is a recess on the top of the core holder (20) (24) is arranged for the use of the spray nozzle (2β). 209850/0032 -. 5 - 5. Injection core according to claims 1 to 4, characterized in that one or more injection channels (30) between the nozzle recess (24) and dowel hole in the transition section (l8) are arranged to run. 209850/00 3 2 Blank page