[0001] The invention refers to a steel canalization for modular bimetallic heating radiators,
such a canalization can be carried out with no weldings and installed by screwing
down the rectilinear pipe tracts, which constitute its horizontal pipes, into the
laying ducts of a fixed part body of the modular elements where the couples of the
mouths of the pipe tracts, which form the connection duct, are situated. The above
stated horizontal pipes are the residual working part of a preliminary structure integrated
inside an aluminium covering during the radiator working process by high-pressure
die-casting, subsequently tapered onto terminals by means of shearings which allow
the heat to reach the above stated ducts. If compared to the heating radiators which
have an only element and are manufactured by pressing, bimetallic modular radiators,
which feature a canalization sector integrated into an aluminium structure have the
advantage that both the size and the shape of the radiator can be adjusted to the
users' specific needs with lower costs of production, control and assembling owing
to their compositive simplicity, lower weight and minor overall dimensions. Moreover,
as the modular elements have a structure formed by an aluminium covering that can
be manufactured through a high-pressure die-casting process, both their model and
composition can be varied according to the house interior decoration and furnishing.
The monobloc-type steel pipes now in use consist of a counterposed pair of horizontal
pipe tracts that can be jointed in different ways; therefore, they can be manufactured
either by pressing down or welding the pipe tracts, or even they can be put together
by jointing the successive pipe tracts coaxially. The first system has the disadvantage
of high operative costs caused by the welding process and by the risk of breakages;
as regards the second system, though no welding operations are requested, the assembly
procedure is rather complex as the pipe fittings must be rapported on pipe tracts
which are located outside the main structure of the basic element. The drawbacks of
the second system are caused by the fact that for the heating the radiator modular
parts must be installed with interposition devices such as reducing pipe joints on
fixed stabilizers, or equipped with locators set on runners. If compared to the working
technologies now in use and here described, the invented system for realizing canalization
improves the sector in particular way as: a) a very essential composition can be carried
out during the radiator unit installation only by screwing down a pair of pipe tracts,
which are part of the horizontal duct, into the ducts of the aluminium covering of
the radiator element itself, where the mouths of the jointing pipe tracts are positioned
in such a way to fit with the corresponding position of the pipe-fitting tracts owing
to the original manufacturing system featured by the present invention; b) a cheaper,
lighter heating element of smaller dimensions is featured as it can be manufactured
with a minimum quantity of steel pipe tracts and through a pressure die-casting manufacturing
process, which can be entirely carried out by an automatic cycle; c) the canalization
assembling and installation can be made even by non-specialists, as they can be carried
out by mnemonic comparison; d) a safety canalization is obtained as no weldings are
necessary and also because the steel pipe tracts are connected on a thread line which
ensures the pipe-fitting compacting: e) as no external joints are featured, this kind
of canalization allow that only the aluminium covering elements necessary to the installation
of the radiator structure and fitting with the house interior decoration and furnishing
are produced. The manufacturing system features a modular element with an aluminium
structure body 1 having on its ends couple of ducts 2 with screw threads 3 having
centrally the mouths 4 of a couple of parallel steel pipes 5 symmetrically convergent
at their ends; said couple of steel pipes integrated into the aluminium structure
itself and forming fitting carrier pipe of the canalization. The modular element with
aluminium body 1 can be carried out starting from a preliminary steel structure 6
to be placed in a pressure die-casting mould to obtain the working bodies where the
end parts 7 of the preliminary structure 6 come out centrally from the smooth wall
ducts 2. Then, on the working line 8 with an intermediate feed, the above stated working
bodies stop in a sequence one after the other in the shearing station 9, on a bearing
10, where a couple of oleodynamic cylinders 11 let simultaneously progress the shearing
tools 12 into ducts 2 cutting the end parts 7 and discharge them through the openings
13. A working body is thus formed having in the ducts 2 the mouths of the steel fitting
carrier pipes. On the working line 8 the bodies thus obtained reach another working
station where the screw thread 3 is operated in the ducts 2. The canalization to be
completed during the assembling of the heating elements by screwing down parts of
steel horizontal pipe - with an external thread in relation with the screw thread
3 - into the sequence of couples of ducts 2. Said parts consist of horizontal pipe-fitting
tracts 14 with openings 15, to be sent to mouths 4 of the starting modular element
of the series to be connected and so on until the last but one of them, and of pipe
tracts for initial position 16 and for end position 17, the last tract with openings
18 to be conveyed onto the mouths 4 of the last modular body 1, both of them featuring
a sealing crown 19 and an external holding part for the tool. The preliminary steel
structure 6, shunting from a couple of duct tracts 20, provides parallel intermediate
tracts converting on fixing extremities assembled by means of watertight weldings
21 to prevent that the melted aluminium comes into it during the moulding phase of
the structure body 1. The heating units to be installed by placing two or more modular
unit with an aluminium structural body 1, in a preliminary fixing condition, by previously
interposing O ring 24 between their semiseats in a pendant position 22 and 23, then
completing their assembling by screwing down one or more pipe-fitting tracts 14 -
which form the horizontal duct- into ducts 2, until their openings 15 have come onto
the mouths 4 of the steel pipes 5. The installation is then completed by screwing
down a pipe tract for initial position 16 into the duct initial part and, at the end,
a pipe tract for end position 17 letting that the openings 18 come onto the mouths
4 of the last modular element. Working realization of the present invention and assembly
phase are illustrated by way of example in the drawings of sheets 1, 2 and 3. In sheet
1 fig. 1 is front view of the duct tracts 20 which can be used to make the preliminary
steel structure. Fig. 2 is front view of the preliminary steel structure 6 with its
parallel pipes held on terminals, which are centrally convergent and assembled with
weldings 21 on their fixing borders. Fig. 3 is side view of a working element, carried
out by means of a pressure die-casting process, to show the end parts 7 emerging from
ducts 2. Fig. 4 is side view of a structural modular body 1, made of aluminium, obtained
by shearing the pipe end parts 7 and by screw threading 3 the ducts 2. Fig. 5 is longitudinal
section view of an end part of the working body coming from the casting to show a
duct 2 with the emerging end part 7. Fig. 6 is longitudinal section view of the same
structural modular body 1 with duct 2 screw threaded 3, to show one of the mouths
4 of the couple of steel pipe tracts 5. In sheet 2 fig. 7 shows the shearing of a
radiator element to be worked according to the predetermined setting plan of a pair
of ducts 2, such an element to be worked reaches the working line 8 by an intermitted
feed, and places itself exactly near a bearing 10 standing behind. A couple of oleodynamic
cylinders 11, with shearing tools 12 in an initial position, as well as a couple of
end parts 7 to be removed and emerging from the ducts 2 are here illustrated. Fig.
8 is transversal section view of the same working process with a view of one of the
shearing tools 12 in progress along a duct 2. Fig. 9 is transversal section view of
the end part 7 already taken away to form the couple of mouths 4 of the steel pipes
5. In sheet 3, fig. 10 is partial view of the assembling of a radiator unit consisting
of two modular bodies 1. It is to be noted a pipe-fitting junction tract 14 in its
operative as well as the end pipe tract for initial position 16. Fig. 11 is partial
prospectic view of the end part of the modular body 1 with a cutaway of duct 2 with
thread 3 and, axially, an exploded drawing of the junction pipe tracts 14 and the
pipe tract for initial disposition 16. Fig. 12 is a sectional transversal view of
an end part of the modular element 1, showing the coinciding system between the openings
15 and the mouths 4. Fig. 13 is a prospectic view of an heating unit composed of two
modular elements with the pipe tract for end position 17.
