ES2223265B1 - IMPROVEMENTS INTRODUCED IN THE PATENT OF INVENTION P 200202498 PER MACHINE FOR THE MANUFACTURE OF TUBULAR BODIES. - Google Patents

Abstract

Improvements introduced in the invention patent 200202498 for "Machine for the manufacture of tubular bodies". Starting from a rewinder (1) for a plurality of bands (5) based on raw materials consisting of vegetable and / or synthetic fibers combined with melting polymers, bands designed to coil helically to configure the intended tubular and cylindrical body on a mandrel ( 10), prior to heating said bands (5) to a temperature that allows adhesion and heat welding between them, the improvements of the invention consist in heating the continuous bands (5) by means of a plurality of heat sources (9 ) that act directly and unitarily on each of these bands, shortening the heating time at the expense of a considerable increase in the working temperature of such heat sources, which allows a drastic reduction in the occupation of space given that, for example pressure blow nozzles established next to each continuous band (5) and in the vicinity of the mandrel (10), its they place a practically negligible space occupation in front of the heating tunnel provided in the main invention patent.

Description

Improvements introduced in the invention patent P200202498 by: "Machine for manufacturing bodies tubular. "

Object of the invention

The present invention relates to a series of improvements introduced in the invention patent 200202498, which specifically affect the heating system of the bands, heating necessary for softening of plastic material that participates in such bands, and the consequent fusion or heat welding between them to configure the chased tubular body.

The object of the invention is to achieve a drastic dimensional reduction in the machine or installation, with the consequences that this brings from the point of view of use of the cabin in which it is established said machine.

Background of the invention

In the invention patent 200202498 it is described a machine for manufacturing tubular bodies that it uses as raw material a plurality of bands based on materials raw materials consisting of combined vegetable and / or synthetic fibers with melting polymers, intended to coil helically to configure the intended tubular and cylindrical body. Specifically said machine incorporates a rewinder in which install a plurality of supply coils of those mentioned bands, mounted on respective axes independent of each other, establishing after said unwinder a tunnel of heating, assisted by a hot air generator in lateral and oblique arrangement, said bands accessing the anterior limb of a mandrel, fixed both angularly as axially, cantilever mounted on a support and to which these bands access tangentially and obliquely, being dragged by a flat belt that causes the bands to slide, partially overlapping, on said mandrel, which is cooled to facilitate rapid welding of the plastic and assisted by a softener liquid impregnator to facilitate the  sliding of the tubular body obtained on the mandrel.

Said tubular body is subsequently fragmented by a cutting device located beyond the end of mandrel outlet

The heating system for the bands provided in said patent makes said tunnel is of considerable length, to achieve that along it produce an appropriate heating of the bands, so that these reach at the exit of the tunnel, and consequently at the point of access to the mandrel, the plasticity necessary for its solid union, which in turn forces to distance very considerable the unwinder of the mandrel, with the consequent loss of space that this brings.

Description of the invention

The improvements proposed by the invention are oriented, as previously said, to a better use of this space, and consist of having the surroundings of said mandrel and in the situation of said tunnel, a plurality of heat sources, specifically one for each band at heat, so that keeping the bands properly distanced by an adequate guidance of them, despite its confluence on the mandrel, in the vicinity of it leave enough space for location between them of the spotlights calorific, with what the occupation of space generated by these last is minimal, practically negligible, and with what the mandrel can be located practically next to the unwinder

Each of the mentioned heat sources can materialize in a nozzle for high pressure air blowing temperature, elongated nozzle corresponding to the width of the band and arranged transversely with respect to the latter, in which case the pressurized air circuit can incorporate a coil housed inside a boiler, where it is produced air heating, up to temperatures that can reach 300ºC, so that the breath of pressurized air on the Continuous bands causes their instantaneous heating at the ideal working temperature.

Optionally the aforementioned air nozzles hot pressurized can be replaced by burners located directly in the vicinity of the continuous bands, either of gas or infrared.

Description of the drawings

To complement the description that is being performing and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization of it, is accompanied as an integral part of said description, a set of drawings where with character Illustrative and not limiting, the following has been represented:

Figure 1.- Shows a representation schematic plan of a machine for the manufacture of bodies tubular made in accordance with the improvements object of the present invention

Figure 2.- Shows a detail in perspective of the area of the machine of the previous figure on which they place the improvements of the invention.

Figure 3.- Shows, finally, a schematic representation in side elevation of the set represented in the previous figure.

Preferred Embodiment of the Invention

Figure 1 shows how in the machine participates, as the main patent, an unwinder (1), in the that on a support frame (2) a plurality of axes (3), independent of each other, intended to receive respective coils (4), suppliers of two continuous bands (5) based on vegetable and / or synthetic fibers combined with melting polymers mentioned above, counting each main coil (4) with at least one auxiliary coil (6) intended to remain in reserve to eliminate time machine dead when coil depletion occurs main (4), at which point at the terminal end of the band (5) it is fixed, for example by a double-sided adhesive, the initial end of the complementary coil (6).

Also as in the invention patent main, the bands (5), after undergoing a phase of heating with a mechanism that in schematic representation of figure 1 has been referenced with (9), they reach obliquely the mandrel (10), where they are offset axially, as note especially in figure 2, but mostly superimposed placing at this initial end of the mandrel (10) a drag device materialized on a flat belt (11), which acting externally on the bands (5) and constituting the mandrel (10) a static element, causes the sliding of said bands around the mandrel (10), with a parallel axial displacement thereof, due to its own inclination, that is to say causing a helical winding of the bands on the mandrel, with parallel axial displacement thereof to along the latter, thus configuring the tube (12) continuously that you want to get.

Well, according to a preferred example of practical embodiment of the invention, under each of the continuous bands (5) a nozzle (13) is established for blowing at high temperature air pressure, specifically at temperature suitable for the plastic material, specifically the polystyrene, which participates in the bands (5), is in thermal conditions of adhering both to another plate of polystyrene like any other layer of the complex, temperature which can reach 300ºC.

For feeding the nozzles (13) it has been planned the use of a boiler (14) in which establishes a coil (15) for air circulation that reaches the nozzles (13), pressurized by the fan (16), so that this boiler (14) can conveniently distance itself from the element heater (9) as a whole, that is to say of the nozzles (13), not impacting only on the occupation of space, since It allows a more rational use of it.

As previously said nozzles (13) for blowing hot pressurized air can be replaced by burners located directly next to the bands (5), such such as gas burners or infrared burners.

Claims (3)

1. Improvements introduced in the invention patent 200202498 for "Machine for the manufacture of tubular bodies", which with the purpose of reducing the dimensions of the machine in order to better utilize the available space, are characterized by replacing the heating tunnel for the continuous bands (5), with which these bands are brought to thermal conditions of adhesion between them, the use of a plurality of heat sources (9), one for each continuous band (5), which remain located between them and in a position of maximum proximity to the winding mandrel of such bands, the latter having been provided tangentially to access the mandrel (10) with a degree of angular offset sufficient to allow the location between them of said heat sources (9) ). 2. Improvements introduced in the invention patent 200202498 by "Machine for the manufacture of tubular bodies", according to claim 1, characterized in that said heat sources are materialized in pressure blown nozzles (13), which project air transversely with respect to the continuous bands (5) at high temperature, which can reach 300 ° C, said nozzles (13) being fed at the expense of a heating boiler (14) crossed by a coil (15) through which the air circulates, pressurized by a fan (16). 3. Improvements introduced in the invention patent 200202498 by "Machine for the manufacture of tubular bodies", according to claim 1, characterized in that optionally the heat sources (9) are materialized in two burners conveniently distanced from the continuous bands (5), burners They can be gas, infrared or similar.