PT101853B - MACHINE FOR DRYING AND QUICK REACTIVATING OF TAILS - Google Patents

Description

DESCRIPTION

MACHINE FOR DRYING AND QUICK REACTIVATION OF GLUES

The invention relates to a machine for the rapid drying and reactivation of glues. More particularly, the present invention relates to a machine for the rapid drying and reactivation of glues based on neoprene, polyurethane and water used for the production of leather and / or natural or synthetic rubber products, such as footwear and similar type.

The machine of the present invention consists of polygonal trunnion type conveyors or conveyors with a horizontal belt or vertical circular circuit rails (type 0), with single or multiple supports, which by rotation or by step-by-step movement they transport the manufactured products, placed on them or supported by said supports, to the treatment posts. These treatment posts are made up of hoods that are firmly attached to said carriers or to the support structures of said simple or multiple supports. Under these conditions, a vacuum is formed inside the hoods and the environment is heated to carry out the drying treatment and / or a radiation treatment to quickly reactivate the glues.

In the most recent machines of the type mentioned above, manufactured products intended for treatment are placed on specific supports which, in turn, are supported by plates, frames or structures that are directly interlocked within hollow spaces or else on mobile bases aligned with the hollow spaces. These spaces are equipped with heating / radiant elements and it is possible to form a vacuum there.

The previous supports and vacuum chambers or hollow spaces where heating and / or radiation occur have different configurations, structures and movement systems, according to the type of machines and / or installations for which they have been designed and taking into account the needs for drying and reactivating glue treatments. Among the known structures, it is worth mentioning those that consist of trunnion-type conveyors with a circular circuit and a closed horizontal ring circuit, on which trays with supports for manufactured products are placed. Said trays have an alternating movement of advancement and alignment and have tilting lids that close tightly to said trays and form hollow spaces with them where the vacuum will be formed and where the drying and reactivation treatments of the glues will occur mentioned before.

There are other known structures consisting of fixed trays with support or closing lids identical to the cases or hinged trays with tilting openings, alignable with fixed or semi-fixed lids, or even flat mobile devices on the conveyor belts, alignable with the vertical clamps . The chambers or hollow spaces necessary for carrying out the aforementioned vacuum drying and glue reactivation treatments are achieved by means of a watertight combination of mobile devices with the vertical hoods, following the alternating advance movement of the said devices and the alternating movement descent of the bellows. To obtain a perfect alignment of the supports in relation to the covers or hoods for the formation of hollow spaces or chambers for the treatments of vacuum drying and reactivation of glues based on neoprene, polyurethane and water, or similar type used in the products manufactured from natural and synthetic leather and / or y y '' rubber, the known machines are equipped with movement and alignment systems that are structurally complicated and whose realization is not easy.

It is an object of the present invention to provide a machine for the rapid drying and reactivation of glues of the type mentioned above, provided with a simple movement and alignment device that is easily realized.

According to the present invention, it is possible to obtain other results that follow from the following description and that are achieved through the aspects characterizing claim 1.

The machine of the present invention will be better understood from the following detailed specification, with reference to the figures in the accompanying drawings, where some variants are shown as non-limiting examples of the present invention. Thus we have:

Figure 1 shows a side view and the corresponding plan view of a machine equipped with a belt movement device;

figure 2 shows a schematic perspective view of the vertical polygonal type trunnion machine;

figure 3 shows a schematic plan view of the same machine as figure 2, figure 4 shows a schematic perspective view of a machine with vertical longitudinal structural orientation, and figure 5 shows a schematic cross section of the machine coupled to a conveyor conventional chain with interchangeable pulleys.

The figures represent machines for the rapid drying and reactivation of glues used for the production of leather and / or natural or synthetic rubber products, in particular footwear.

According to a first variant shown in figure 1, the machine for drying and reactivating adhesives consists of one or more continuous conveyor belts (1) essentially made of flexible or rigid panels (2) linked together, provided with a peripheral edge continuous (3) and with a central support bed (4). The products to be treated are placed in each support bed, for example, soles or other components treated with glues based on neoprene, polyurethane and water or similar

similar. Being the products (5) placed on the beds in support (4), at straps continuous (1) they move forward, for example, in according to the direction arrows (6), with one

reciprocating step by step.

/

The machine consists sequentially of a first suction station (30), a treatment station consisting of vertical mobile bellows (7) and possibly a cooling station (31).

The panels (2) pass under the first solvent suction station (30) where the drying phase begins and are then aligned under the hoods (7). The bellows (7) descend until their peripheral edges (8) fit tightly with the edges (3) of said panels. Under these conditions, a vacuum is created in the chamber constituted by the coupling between the hoods (7) and the panels (2), thus generating the moisture suction activity existing in the water-based glues or the solvent suction contained in the glues. based on neoprene or polyurethane and a thermal and / or radiant activity is produced by means of

internal heating devices to accelerate evaporation and reactivate said adhesives.

Then the vacuum is canceled, the bellows (7) are raised and the conveyor belts are advanced towards the next stations where the products to be treated will be worked, sliding under any cooling fans (31) .

Alternatively, for greater and more effective activity on all parts of the products to be treated, the support beds (4) of the panels (2) can be equipped with a multiplicity of through holes or with a grid and the hoods (7) can possibly be coupled to covers (9) that close from below, which fit tightly with the bottom of the edges (3) of said panels (2). When using this machine for the treatment of shoes, the holes are made on the support beds (4) of the panels (2), these holes having sections or cleats corresponding to the shapes of the shoes to be treated which, in this case, are preferably placed with the sole facing upwards. In this case, the vacuum chamber for the treatment consists of a bell (7) and the opposite cover (9), fitting one another with the interposition of the flange (3) of the panel that is aligned with them.

According to another variant shown in figures 2 and 3, the machine for drying and reactivating the adhesives consists of at least one column or trunnion type conveyor (polygonal section), attached to a central vertical pin (11) and endowed with a rotating alternating step by step, with eventual return to the starting position. In correspondence with each side of the central polygonal column there is a vertical recess (12) where adjustable supports are located. In the type used for footwear or similar products, said adjustable support means are shelves (13), possibly rack shelves for soles, and forks (14) for fitted shoes.

At each rotation, in the direction indicated by the arrow (15), the soles and shoes fitted with vertical recesses are deposited on the front (12) of a post (16), with a corresponding side cam-cannula (17), which slides over lower rails (not shown) and over upper rails (18).

When sliding to close, the front peripheral edges (19) of the bell (17) mesh tightly with the peripheral edges (20) of the recess (12) that at that moment is aligned with said bell.

Inside the hood there are heaters / radiators (21).

watertight coupling of the bell (17) with each recess (12) will create the treatment vacuum chamber to dry and reactivate the existing glues in particular points of the footwear or similar products.

When the bell (17) slides to open, the polygonal column (10) is forced to rotate one step and the treated products are discharged from the recess that is appearing, while the next recess will be aligned with the bell for a new operational phase.

Instead of the polygonal column (10), the machine described above can be equipped, in alignment with the bell (17), with a closed circuit conveyor (10 ') made up of the upper and lower rails (32) between which they are several recesses (12 ¹ ) are practically identical to those described above. The forward movement step by step makes the bell (17) and the recess (12 ') face to face with the relevant load of the products to be treated and their watertight coupling is carried out

r '”r with the similar peripheral edges (19) and (20) which are in contact with each other.

For possible uses with reduced productions and only with the presence of a single operator, the column continues to rotate step by step, but in each two recesses instead of each individual recess, or the rotation occurs alternately forwards and backwards, loading and unloading on the same side.

According to another variant shown in figure 4, the vacuum treatment chamber preferably consists of two bellows (22), the same or similar, and in any case attachable, opposite and aligned with each other in relation to a constituted vertical plane, for example and preferably, by a peripheral edge of the frame (23) that supports the supports (24, 25) of the products to be treated, such as soles, shoes and the like.

The frames (23) are fixed to rails that form a vertical ring circuit (26), which can be used properly in continuous work cycles with the arrival and departure of the conveyor belts (27, 28), with loading stations and discharge to the central treatment station (29).

The rails (26) are practically aligned with the center of the conveyor belts (27, 28) and there are frames (23) with supports (24, 25) on the two opposite fronts. Therefore, the machine has a double front, with simultaneous use on both sides, which significantly increases the production capacity, with equal space available.

The frames (23) may possibly consist of a closed bottom in the central part or double opposing supports (24, 25) with no bottom.

With regard to the closed loop circuits (26) in which the frames (23) which support the products (5) to be treated slide, step by step, it is also possible to couple hot air or radiation or type tunnels similar (100), placed sequentially after the bellows (22). In this case, the products (5) placed in the frames (23) and which were previously subjected to the treatment in the vacuum hoods (22), pass sequentially through the tunnels (100) in order to maintain a stable and adequate temperature, before to be subjected to subsequent operational phases such as applying the parts with reactivated glues, by compression.

According to another aspect shown in figure 5, the vacuum treatment chamber (22 ') also consists of two opposing bellows (33,33') that interlock and disengage from each other, by combined translation movements (34) . In this case, the treatment chamber (22) is coupled to a chain conveyor system (35) which consists of a multiplicity of aligned platforms (36) in whose upper part there is an element of 'longitudinal drag (37), consisting practically of a driving chain, having hooks (38) that engage and drag along the complementary coupling means (39) existing in the exchangeable pulleys.

Said pulleys, of a conventional one, have shelves located outside the two types of support (33, 33 ') supports products lower pulley supports (42, 43) suitable for (5) being produced or being produced. are attached to suspended frames (44) (40).

endure treaties.

the

Those of

The pulleys are attached to the longitudinal rails

The coupling between the system (45) by means of sliding casters means (38,39) engages each transport, which will allow (46).

pulleys its drag between the different workstations, sequentially one another, along a path predetermined by an aligned configuration of platforms (36) and by the corresponding horizontal development of the drag chain (35), with eventual posts for movement inversion and return in accordance with a continuous closed cycle work organization.

When a pulley (40), whose forward movement is intermittent and timed, stops in line with the vacuum treatment chamber (32 '), the two opposing bellows (33, 33') approach and engage each other, engaging perfectly in the corresponding frame (44); then, the drying and reactivation treatment begins, as described above.

Although the present invention has been illustrated and described according to some variants presented only as a non-limiting example, it is evident to those skilled in the art that it is possible to introduce several changes in the structures, configurations, proportions, general characteristics and orientation of the components, without departing from its scope of protection.

Lisbon, March 22, 1996

Claims (11)

1. A machine for the rapid drying and reactivation of glues, consisting of at least one horizontal movable hood (7), alternating movement, with internal heating / radiation devices and devices for creating a vacuum and at least one belt continuous conveyor (1) consisting of flexible panels (2) adjacent to each other and provided with a continuous peripheral edge (3) that circumscribes the central support bed (4), said peripheral edges (3) being firmly coupled with the edges peripherals (8) of said bellows (7), when placed in conditions of lowering and closing, in each alternate step of advancement of said conveyor belt, with a progression corresponding to the progression of each of said panels. Machine according to claim 1, characterized in that the support beds (4) of the panels (2) that make up the conveyor belts have a flat structure and constitute the supports for products made of synthetic or natural leather treated with glues subjected to a drying and reactivation treatment. Machine according to claims 1 and 2, characterized in that the support beds (4) of the flexible or rigid panels (2) of said conveyor belts (1) are provided with a plurality of through holes or a grid structure, or molds, and the overlapping hoods (7) are attached to covers (9) located below the descent level of said belts, the peripheral edges (3) of said flexible or rigid panels (2) being attachable with the two peripheral edges (8) of these hoods (7), when placed in situations of descending and closing, and with the peripheral edges of the underlying caps (9). 4. A machine for the rapid drying and reactivation of glues, characterized by the fact that it consists of at least one bell (17) with heaters / radiators, which has a vertical structure and a transverse opening and closing movement, and a conveyor (10) in polygonal column or a trunnion type, coupled to a central pin (11) with an alternating rotary movement step by step or forward and backward, said column (10) constituted by vertical recesses (12) where there are supports and shelves (13) and / or forks (14), in which said recesses (12) have peripheral edges (20) which, aligned with said bell (17), engage firmly with the peripheral edges of their opening vertical side. I Machine according to claim 4, characterized in that said bell (17) slides over parallel rails (18), upper and lower, and in that the watertight coupling of said bell (17), with alternating alignment, with the recesses (12) of said polygonal columns (10) constitute the vacuum treatment chamber, equipped with heaters / radiators (21) for the products to be treated when placed on the supports (24, 25). Machine according to claim 4 or 5, characterized in that the polygonal column is replaced by a closed loop conveyor system (30) that slides over parallel tracks (30), lower and upper, said system consisting of a multiplicity of recesses (12 ') which, aligned with the bell (17), mesh tightly through the contact of the relevant peripheral edges (19) and (20). 7. Machine for the rapid drying and reactivation of glues, characterized by the fact that the vacuum treatment chambers equipped with heating and / or radiation devices are made up of the same or similar hoods (22) but always connectable, opposite and aligned with each other the other in relation to a vertical plane, with an alternating translation movement of opening and closing in a horizontal transverse direction, in relation to the arrangement of the vertical rails (26) in closed circuit on each side, with a forward movement step by step, by frames (23) that support the supports (24 and (25) of the elements to be treated, the said frames (23) being aligned in an intermediate position in relation to the said bellows (22) and constituting the rim on which the said ones bellows, when closed, engage in a watertight manner. 8. Machine according to claim 7, I characterized 9. due to the fact that closed circuit clamps support the (22) are frames (23) attachable with coupled to the belts the conveyors on arrival continuous work. in the discharge of cycles of Machine according to claims on rails (26) 7 or 8, characterized by the fact that they are centrally aligned in a circuit with respect to (28) on arrival and through a movement of conveyor belts (27) and unloading and support and activate, from alternating advance step to constituted by the supports (24 ) and (25) for the products to be treated, located on two opposite fronts, with or without interposition of a central closed bottom. Machine according to claims 7, 8 and 9, characterized by the fact that, coupled to the closed circuit rails (26) and sequentially with the vacuum treatment hoods (22), hot water or radiation tunnels (100 ) which keep the temperature of the products (23) supported by the frames (23) fixed and leaving the treatment hoods (22) fixed. 11. Machine for the quick drying and reactivation of glues, characterized by the fact that it is a heating chamber (22 ') and / or (33,33') equal or attachable, opposite to an alternate translation plane of constituted radiation treatment , similar by vacuum, formed in line or with at least one with a bell system in any shape and the other in vertical, opening with one and closing in the horizontal movement, and with a chain transport system (35) consisting of a multiplicity of aligned platforms (36) on whose upper part there is a longitudinal drag mechanism of the driving chain that supports an exchangeable pulley (40), the latter having a frame (44) to support the products to be treated (5 ), which meshes tightly with the edges of the hoods (33.33 ') at the time of opening. 12. Machine for the rapid drying and reactivation of glues, in particular glues based on neoprene, polyurethane and water, used to produce industrial products made of leather and / or natural or synthetic rubber such as footwear and the like, as described and illustrated in the attached drawings.