[0001] The invention refers to a method for the production of angled concrete roofing tiles,
with the aid of an angled profiled under mould, which must form the underside of the
tile and which will be placed in a worktable.
[0002] For roofs, whereby in one roofside different pitches of the roof are in line with
each other, one uses so-called angled roof tiles. These roofs, e.g. mansardroofs are
much less in use with modern building methods, but with renovation of existing roofs
they appear frequently.
[0003] Though it is possible to construct the connection between the two different roofpitches
in other ways, e.g. with a profile in zinc, preference will be given to a continuous
roofcovering, whereby the angled roof tile is used. This solution is better looking
and besides cheaper too.
[0004] These angled roof tiles were made up till now as handmade fittings, of which the
quality not always was constant and the costs of production per unit were relatively
high. The normally small quantities required do not justify large investments.
[0005] The invention intends to create a method, which facilitates a more mechanized production
with small investments, with as advantages a better product with lower labour costs.
[0006] The method according to the invention can achieve this in that the upper side of
the roofing tile will be formed by a profiled roller rotating around a horizontal
axis, which axis is moved parallel to itself at a certain distance from the mould,
following the angled shape of the mould.
[0007] The invention refers also to the apparatus for carrying out this method, comprising
an angled and profiled undermould places in a worktable, which apparatus is characterized
in that a profiled roller rotating around a horizontal axis, is placed in one end
of a balance, of which the horizontal tilting axis is movable over a fixed flat plane,
while the other end of the balance will be guided by a guiding rail containing two
inclined straight parts.
[0008] The invention will be explained more detailed with reference to the drawings, in
which:
Fig. 1 is a front view of an angled rooftile, made with the method and the apparatus
mentioned;
Fig. 2 is a longitudinal section over the line II-II of fig. 1;
fig. 3, 4 and 5 are some schematic views of the apparatus according to the invention
in different stages and
Fig. 6 is a sideview of an upper roller.
[0009] The angled roof tiles 1 (fig. 1 and 2) have an inclination angle (fig. 2), which
usually is less than 180°, but can also be more than 180°, thus having an angle upwards
instead of downwards. This would not be a mandardroof, but a leanto roof like with
farmbuildings or similar.
[0010] The following description refers to an angled roofing tile 1 with an angler which
in normal practice will be based on 140°.
[0011] The apparatus will produce with little effort and costs angled roof tiles with other
angles, provided the moulds, on which these angles roof tiles are to be made, are
of the right model and form.
[0012] The apparatus according to the invention exists of a worktable with placed on it
a profiled mould 2, which forms the underside and the edges of an angled roof tile
1 to be produced. The profiled mould 2 will have the same shape as the connecting
planes 3 and 4 of the worktable. These planes 3 and 4 will be profiled like the surface
of the mould 2, but these planes taper gradually to the surface of the profile of
the tile 1.
[0013] On the mould 2 with the connecting planes 3 and 4 fresh mortar will be placed in
a simple way. This mortar can be batched as well as placed with simple means, by which
the mortar roughly is spread evenly over the mould and connecting planes.
[0014] The compaction of the mortar is carried out in a similar way as the normal concrete
roofing tile production, namely with a rotating profiled roller 5, but without the
extrusion profile (slipper) as used in normal production of concrete roofing tiles.
This profiled roller 5, of which an embodiment is shown in fig. 6, can rotate in both
directions, also depending on the direction of movement over the tile 1.
[0015] The profiled roller 5 driven by a motor is part of a mobile mechanism, which means
the roller 5 is placed at the end of the - balance 6. This mobile mechanism moves
over a set of rails 7, on which a set of wheels 8 rests. In 8 we find also the turning
point of balance 6 and at the other end of the balance 6 we find a set of guiding
wheels 9.
[0016] These guiding wheels 9 guide the position of the profiled roller 5 via a curved rail
10, of which the deepest point corresponds with the highest point of the angled tile
1.
[0017] The profiled roller 5 will be pressed onto the tile to be shaped, via the guiding
wheels 9, in such a way that a sufficient compaction in a correct profile height and
shape is obtained, provided there is enough mortar placed on the areas to be compacted.
[0018] The movement of the set of wheels 8 will be made by means of hydraulic or pneumatic
(double action) cylinders, spindle motor or direct drive (not indicated on the sketches).
Starting from the begin position (fig. 3) the mechanism will move to the position
according to fig. 4 and further to the position according to fig. 5. At the first
cycle over the entire tile the places, where mortar has to be added become clear and
after about 3 cycles in both directions together with the necessary mortar additions,
the angled roofing tile is ready.
[0019] To protect the operator a handle on both sides of the roller 5 is placed, while the
roller 5 is protected on its topside by a hood. If one presses the handle, the drive
of the profiled roller 5 will stop.
[0020] After the angled roofing tile has been completed this will be cut at its both ends
near the planes 3 and 4 with a profiled knife, which is provided at both ends with
a peg. These pegs fit into a guiding bush, which guarantees the cutting in the right
position and direction.
[0021] The angled roofing tile 1, now cut free, will be lifted out of the worktable together
with the mould, either with hydraulic or pneumatic cylinder, or by means of a mechanical,lever.
Hereafter the angled roofing tile 1 will be carried off for further eventual finishing
(e.g. finishing with slurry and granules) and curing. In the same way, but with adapted
moulds 2, one can produce also left and right hand angled roofing verge tiles as well
as half angled roofing tiles.
1. Method for the production of an angled roofing tile, with the aid of an angled
profiled undermould, which must form the underside of the tile and which will be placed
in a worktable, characterized in that the upperside of the roofing tile will be formed
by a profiled roller rotating around a horizontal axis, which axis will be moved parallel
to itself at a certain distance from the mould, following the angled shape of the
mould.
2. Apparatus for carrying out the method according to claim 1, comprising an angled
and profiled undermould placed in a worktable, characterized in that a profiled roller
(5) rotating around a horizontal axis is placed in one end of a balance (6), of which
the horizontal tilting axis is movable over a fixed flat plane (7), while the other
end of the balance (6) will be guided over a guiding rail (10) containing two inclined
straight parts.