CN1084173C - Machines that make glue dry and regenerate quickly - Google Patents

Abstract

A machine for rapid drying and regeneration of glue, comprising a polygonal trunnion conveyor with horizontal conveyor belts or vertical rails or chains, etc., with a simple or multiple support for the products to be treated and with at least one housing tightly engaged with said conveyor or said support by transverse sliding. The tight chamber thus achieved is provided with means for forming a vacuum and with heating elements. The machine is particularly suitable for drying and regeneration of neoprene, polyurethane and water-based glues used in the manufacture of artificial products made of natural or synthetic leather, generally soles or especially shoes.

Description

Machines that make glue dry and regenerate quickly

The invention relates to a machine for rapid drying and regeneration of glue. More specifically, this invention relates to machines for the rapid drying and regeneration of neoprene, polyurethane and water-based glues used in the manufacture of artificial products made of natural or synthetic leather and/or rubber, such as shoes class etc.

The machine of the invention consists of a trunnion-type polygonal conveyor or a conveyor belt with horizontal belts or vertical tracks or chains, etc., with simple or multiple supports, on which the conveyor belt will rest by turning or moving forward in steps Or the artefact supported by the support is transported to a processing station. Said processing stations comprise single or multiple enclosures tightly engaged with said conveyor belt or said simple or multiple supported support structures. Under these conditions, a vacuum is formed inside the enclosure, allowing the surrounding environment to be heated for drying and/or radiation treatment, enabling rapid regeneration of the glue.

In the latest machines of the type described above, the artefacts to be processed are placed on special supports, which in turn are supported by plates, frames, or on movable bases directly engaged in or aligned with hollow spaces. supported by the structure. The space is equipped with heating/radiation elements, the inside of which can be vacuumed.

According to the formation of the machine and/or the installation method required by the machine and the glue drying and regeneration process required, the above-mentioned support and the vacuum chamber or hollow space heated and/or irradiated inside have different shapes, structures and motion systems. Among the known structures, we recall those consisting of circular and closed, horizontal circular trunnion conveyors in which trays with artifact supports are placed. The tray makes alternate advancing and aligning movements. The tray has an inclined cover. When closed, the cover is tightly engaged with the tray and forms a hollow space with the tray. A vacuum is formed in the space and the above-mentioned Glue drying and regeneration treatment.

Other known structures include fixed trays with supported or suitcase-like closable lids, or hinged trays with angled openings aligned with fixed or semi-fixed lids, or even Consists of a flat movable unit on a conveyor belt aligned with the vertical enclosure. The necessary hollow spaces or cavities for achieving said vacuum drying and regeneration of the glue are obtained by the close combination of the mobile device with the vertical housing, followed by an alternating forward movement of said device or lowering of the housing. Vacuum drying and regeneration of neoprene, polyurethane and water-based glues, etc. The hollow spaces or cavities of known machines are equipped with movement and alignment systems which are complex in structure and not easy to realize.

The object of the present invention is to provide a machine for rapid drying and regeneration of glue of the above-mentioned type, with simple and easily realized movement and alignment means.

The machine according to the invention, comprising at least one vertically movable casing, which can move alternately, with internal heating/radiation means and means for creating a vacuum, and which also comprises at least one flexible table formed by placing them close to each other a continuous conveyor belt; the deck is provided with a continuous peripheral edge defining a central support table, the peripheral The edge closely engages the peripheral edge of the mantle, the advancement of the mantle being compatible with the advancement of each of the decks.

The machine of the invention, comprising at least one housing with a heater/radiator, also at least one housing with a vertical structure and lateral opening and closing movement and embedded on a central pin, can be made step by step or towards Polygonal uprights or trunnion conveyors with alternating front-to-back swivel motion; said uprights include vertical wells in which supports and shelves and/or forks are located; said wells include peripheral edges , the peripheral edge is aligned with the shell, and is tightly joined with the peripheral front edge of the vertical side opening of the shell.

The machine of the present invention, comprising at least one vacuum processing chamber with heaters/radiators, composed of equal or similar and engageable, oppositely arranged and aligned with respect to a vertical plane, can be horizontally positioned relative to a closed circular vertical track The casing is composed of alternating rectilinear movement of closing and opening in the transverse direction; the frame slides on the circular track, which can make a step-by-step forward movement, and the frame limits the support of the product to be processed: the frame, in relation to the The shells are aligned in a row in the middle and have a lip on which the shells fit snugly when closed.

The machine according to the invention, also comprises at least one vacuum treatment chamber with a heating and/or radiation system consisting of enclosures which are equal or similar, or joinable, arranged opposite to a vertical plane and mutually Alignment, it can do linear movement of alternating horizontal opening and closing. In addition, the machine also has a chain transmission system, which consists of many brackets arranged in a straight line. On the top of the bracket, there is a motor-driven chain that supports the exchangeable trolley. Pulling the gears longitudinally, the trolley has a frame to support the product to be handled, the frame tightly engaging the edge of the hood when the hood is closed.

The machine of the invention will be better understood from the following detailed description, in which is illustrated the figures of the accompanying drawings, which represent several embodiments of the invention given by way of non-limiting example. In the picture:

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

Figure 2 shows a schematic perspective view of a trunnion-shaped vertical polygonal machine;

Figure 3 represents a plan view of the same machine as Figure 2;

Figure 4 represents a schematic perspective view of a machine with a vertical longitudinal structure orientation, and

Figure 5 shows a schematic cross-section of a machine connected to a conventional chain conveyor with exchangeable trolleys.

These figures represent a machine for rapid drying and regeneration of glue used for the manufacture of artefacts made of natural or synthetic leather and/or rubber, in particular footwear.

According to a first embodiment shown in FIG. 1 , the machine for drying and regenerating glue comprises one or more continuous conveyor belts ( 1 ) consisting of flexible or rigid pallets ( 2) Consists of a deck with a continuous peripheral edge (3) and a central support deck (4). The product to be treated is placed on each support surface, such as shoe soles or other components treated with neoprene, polyurethane or water-based glue. After the products (5) are arranged on the support table (4), the belt (1) is continuous. For example, it can move forward according to the direction of the arrow (6), while alternately making a step-by-step movement.

The machine comprises in turn a first suction station (30), a treatment station with a vertically movable housing (7) and possibly a cooling station (31). The platen ( 2 ) passes under the first solvent suction station ( 30 ), where the drying phase begins, and is then aligned under the hood ( 7 ). The shell (7) is lowered until its peripheral edge (8) tightly engages the edge (3) of the deck. Under these conditions, a vacuum is created in the cavity formed by the joint of the housing (7)-table (2), which creates suction. In water-based glue containing moisture or in neoprene or poly The action of the solvent contained in the urethane glue, and through internal heating means, generates heat and/or radiation action, which accelerates the process of evaporation and regeneration of said glue. Afterwards, the vacuum becomes zero, the hood (7) is raised, and the conveyor belt moves forward, towards the successive stations of products to be processed, sliding under possible cooling fans (31).

Alternatively, for a greater and more effective effect on all parts of the product to be handled, the support table (4) of the table (2) can have a number of through holes or a lattice, while the housing (7 ) is engageable with a closing cover (9) at the lower end, the cover (9) tightly engaging with the lower end portion of the edge (3) of the deck (2). When using said machine for the processing of shoes, through-holes are made on the supporting table (4) of the table (2), these holes have parts or imprints adapted to the shape of the shoes to be processed, in this case Next, the shoes are best placed with the soles facing up. Also, in this case, the vacuum chamber used for the treatment consists of a housing (7) and an oppositely placed cover (9) with an insert of the edge (3) of the platen aligned with it mesh with each other.

According to another embodiment shown in Figures 2 and 3, the machine for drying and regenerating glue comprises at least one column, or trunnion conveyor (10) of polygonal section, supported on a central vertical pin (11) on, and can do the alternate motion step by step of turning, can get back to initial position. Corresponding to each side of the central polygonal upright, there is obtained a vertical well (12) in which the adjustable support is placed. In the form used for footwear or the like, said adjustable support means is a shelf (13) for soles, possibly a trellis shelf, and forks (14) for travel shoes. In each turn, following the direction of the arrow (15), the soles and the travel shoes are placed on the above-mentioned vertical concave part (12) at the station (16), and accordingly, a lower rail ( Not shown) and the side shell cover (17) that slides on the upper track (18).

During the closing slide, the front peripheral edge (19) of the shell (17) tightly engages the peripheral edge (20) of the well (12) which is then aligned with said shell. Inside the enclosure there is a heater/radiator (21).

The tight engagement of the shell (17) with each well (12) forms the processing vacuum chamber required to dry and regenerate the glue on various parts of footwear and the like.

When the shell cover (17) is opened and slid, the polygonal column (10) rotates one step, and the processed product is unloaded from the concave part coming out, and at the same time, the next concave part is aligned with the shell cover for a new operate.

The above-mentioned machine can also be provided with a closed endless conveyor belt (10 '), which is aligned with the shell (17) and replaces the polygonal column (10); the closed endless conveyor belt (10 ') consists of upper and lower rails (32) Composition, there are many concave parts (12') between the rails, and the concave parts (12') are exactly the same as the above-mentioned concave parts. The step-by-step forward movement brings the housing (17) facing the well (12'), the product to be processed (5) is properly mounted, and the housing (17) and well (12') A tight fit is achieved, with similar peripheral edges (19) and (20) touching each other. In order to be possible for use with smaller production volumes and only one operator, the column is still turned step by step, but one step per two wells instead of one step per single well, or alternatively Rotate forward and backward so that installation and removal are done on the same side.

According to another embodiment shown in Figure 4, the vacuum processing chamber preferably consists of two casings (22), which are equal or similar and in any case joinable, oppositely arranged At the same time, for example and preferably, the alignment with respect to the vertical plane formed with respect to each other is guaranteed by the peripheral edges of the frame (23), which limit the support (24) of the product to be processed, such as soles, shoes, etc. , 25).

The frame (23) is fixed on a vertical circular track (26), suitably used in a continuous duty cycle, with conveyor belts (27, 28) arriving and starting, for the central processing station (29) There are also installation and removal stations.

A track (26) is arranged substantially in the center of the conveyor belts (27, 28) and on two opposite front ends of the track the frame (23) is provided with supports (24, 25). Thus, the machine has a double front end, which can be used on both sides simultaneously, which significantly increases productivity, the intervals the machine has are equal.

The frame (23) may comprise a closed bottom in the central part, or opposite bottomless double supports (24, 25). The frame (23) supports the product (5) to be processed on the closed circular track (26), slides step by step, behind the shell (22), sequentially connects and places hot air or radiant air ducts ( 100) etc. In this case, the product (5) placed on the frame (23) is first processed by the vacuum enclosure (22), in order to receive subsequent operations, such as connecting the parts by pressing the regenerated glue , before, maintaining a fixed and proper temperature, the product (5) passes through the air duct (100) sequentially.

According to yet another embodiment shown in FIG. 5, the vacuum processing chamber (22') is also composed of two oppositely placed housings (33, 33'), which engage each other by means of a compound rectilinear movement (34) and separate. In this case, the treatment chamber (22') is connected to a chain conveyor system (35) consisting of a number of racks (36) arranged in a line, on top of which there are longitudinal pullers (37) , the pulling member consists of a motor-driven chain including a hook device (38), which is embedded in an auxiliary connection device (39) on the exchangeable trolley and pulled along the auxiliary connection device.

Said trolley is of the usual form, comprising a support shelf (41) placed outside the two enclosures (33, 33') and a lower support (42, 43) suitable for supporting the product (5) to be worked or handled. ). The support is embedded in a frame (44) suspended from a trolley (40).

Dolly is connected with longitudinal track (45) by sliding caster (46). The connection between the devices (38, 39) allows each trolley to be embedded on the conveying system between the different workstations arranged in sequence with each other, along the support (36) and the traction system arranged in a straight line and arranged in series. The corresponding horizontal expansion of the chain (35) pulls the trolley along the predetermined path, and according to the continuous closed loop organization, the station at the end can be reversed and returned. When the forward movement is intermittent and timed the carriage (40) is stopped and aligned with the vacuum processing chamber (22'), the two oppositely configured housings (33, 33') approach and engage each other, snapping tightly Close to the corresponding frame (44), after which the drying and regeneration process begins, as previously described.

Although the invention has been described according to several embodiments given by way of non-limiting examples only, it will be clear to the skilled expert that various modifications can be made in the structure, shape, size, general characteristics and orientation of the constituent elements, without exceeding its scope of protection.

Claims (12)

1. A machine for rapid drying and regenerating of glue, comprising at least one vertical movable housing (7), which is movable alternately, with internal heating/radiation means and means for generating a vacuum, characterized in that , which comprises at least one continuous conveyor belt (1) consisting of flexible decks (2) placed close to each other; the decks (2) are provided with continuous peripheral edges (3), which define a central support deck (4) , when the housing (7) is in the lowered and closed condition, the conveyor belt alternately moves forward with each step, and the peripheral edge (3) is tightly connected to the peripheral edge of the housing (7) (8) engagement, the advancement of the housing (7) is adapted to the advancement of each of said decks. 2. Machine according to claim 1, characterized in that the support table (4) constituting the table (2) of the conveyor belt has a flat structure and constitutes a product made of synthetic or natural leather treated with glue, subjected to drying and regeneration support. 3. The machine according to claims 1 and 2, characterized in that the support table (4) of the flexible or rigid table (2) of the conveyor belt (1) is provided with many holes or lattice through-through structures or imprints, for placing The upper shell (7) is engaged with the cover (9) located below the lower surface of the conveyor belt: when the shell (7) is in the lowered and closed condition, the rigid or flexible table The peripheral edge (3) of (2) is in tight engagement with the peripheral edge (8) of the casing (7) and the peripheral edge of the lower lid (9). 4. A machine for fast drying and regeneration of glue, comprising at least one housing with heater/radiator, characterized in that it also comprises at least one housing (17) with vertical structure and lateral opening and closing movement ) and embedded in the center pin (11), which can be used step by step or alternately rotate forward and backward polygonal column or trunnion type transmission device (10); said column (10) includes a vertical concave part (12), in which a support and shelf (13) and/or a fork (14) are provided in the recessed part (12); Said casing (17) is aligned, and the peripheral front edge of the vertical side opening of the casing (17) is closely engaged. 5. Machine according to claim 4, characterized in that the side casings (17) slide on upper and lower parallel rails (18) and that said casings (17) are aligned with the recesses of said polygonal uprights (10) The lower part (12) closely fits to form a vacuum processing chamber with a heater/radiator (21) for the product to be processed placed on the support (24, 25), wherein the housing (17) and the The alignment of the lower part (12) is done alternately. 6. Machine according to claim 4 or 5, characterized in that the polygonal columns are replaced by a closed circular conveyor system (10') sliding on upper and lower parallel rails (32); said system consists of a number of recesses (12') constituted, these recesses (12') are aligned with the housing (17) for tight engagement by contact of the associated peripheral edges (19) and (20). 7. Machine for rapid drying and regeneration of glue, comprising at least one vacuum treatment chamber with heater/radiator, characterized in that at least one vacuum treatment chamber is made of equal or similar and can be joined, arranged opposite to a vertical plane Aligned with each other, it can be closed and opened in the horizontal and transverse direction with respect to the closed circular vertical track (26), the shell cover (22) is formed; the frame (23) slides on the circular track, and can make a One-step forward movement, the frame (23) limits the support (24, 25) of the product to be processed: said frame (23), in an intermediate position relative to said housing (22), is arranged in a row and have a lip on which the casing fits snugly when closed. 8. Machine according to claim 7, characterized in that the closed circular vertical track (26) of the supporting frame (23) is connected to the casing (22) and is connected to the arrival and output conveyors of the continuous working cycle. 9. The machine according to claim 7 or 8, characterized in that the closed circular track (26) is arranged in the middle with respect to the arrival and output conveyor belts (27) and (28), and moves forward by alternating step by step , supporting and driving the frame (23), the frame (23) has supports (24) and (25) for the products to be processed, the frame (23) is placed on two opposite front ends, inserted into the middle closed bottom. 10. The machine according to claim 7 or 8, characterized in that the closed circular track (26) is arranged in the middle with respect to the arrival and output conveyor belts (27) and (28), and moves forward by alternating step by step , supporting and driving the frame (23), the frame (23) has supports (24) and (25) for the products to be processed, the frame (23) is placed on two opposite front ends, not inserted into the middle closed bottom. 11. Machine according to claim 7 or 8, characterized in that a hot water or radiant air duct (100) is provided, which is connected to a closed circular track (26) next to the vacuum treatment shell (22 ), the air duct is supported by the frame (23), and the temperature of the product (5) coming out from the processing shell (22) is fixed. 12. Machine for rapid drying and regeneration of glue, comprising at least one vacuum treatment chamber (22') with a heating and/or radiation system consisting of a casing (33, 33'), the casing (33, 33' ) are equal or similar, or can be joined, characterized in that the shells are arranged opposite to the vertical plane and aligned with each other, and can perform linear movements of alternating horizontal opening and closing, and the machine also has a Chain transmission system (35), it is made of many supports (36) that are arranged in a straight line, there is the motor-driven chain type longitudinal pulling gear that supports exchangeable trolley (40) at the support top, and trolley (40) has frame (44), for supporting the product (5) to be processed, the frame (44) tightly engages the edge of the enclosure (33, 33') when the enclosure (33, 33') is closed.

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