WO2022032361A1

WO2022032361A1 - Anti-residue housing for edge melter with integrated pre-melting unit

Info

Publication number: WO2022032361A1
Application number: PCT/BR2020/050315
Authority: WO
Inventors: Peter WERNER BRILL
Original assignee: Werner Brill Peter
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2022-02-17
Also published as: BR212022015494U2

Abstract

An edge melter housing assembly that uses reactive polyurethane (PUR) hot-melt adhesives with a pre-melt system comprises two elongate vertical portions where the pre-melting unit is coupled. The upper and lower portions of the anti-residue housing are coupled mechanically, with no need for gaskets or adhesives. The construction engineering process using precision machining technologies guarantees a perfect flow of hot liquid adhesive in the upper and lower portions thereof to the glue applicator. The full equipment is fastened to the user's production line using a standard mechanical connection and can have different possible configurations, depending on the features of the production line, positioning the equipment to the left, to the right, or in the centre, in relation to the part that is to receive the adhesive.

Description

“ANTI-WASTE CASING FOR EDGE COLLECTION WITH INTEGRATED PREFUSER”

The present patent aims to protect the technology of the set of component parts (upper and lower parts) of the housing of an equipment for gluing edges used in the manufacture of furniture, doors and openings and more specifically, in gluing edges. The housing of this equipment, object of this patent application, has characteristics that inhibit the formation of residues inside it, hereinafter referred to simply as the "housing" of the equipment, applicable to the assembly of an edge collar (hereinafter referred to only as a 'collar' in order to to simplify the text) with an integrated nozzle and which was given original construction, with a view to improving its use and efficiency in relation to the housings of existing models.

This type of equipment (edge gluer) is widely used in the manufacture of furniture, doors and openings and, more specifically, in gluing the edges themselves. In this sense, edge bonding systems that use "Hot-Melt" Reactive Polyurethane (PUR) adhesive media have prefusion systems, which provide liquefaction of the adhesive medium (hereinafter called just 'adhesive' in order to simplify the text) for later transfer by inertia to the also heated adhesive application system, itself, to the surface that will receive the adhesive for bonding.

The conventional housing made of metal alloy is already known on the market, a component part of the edge gluer equipment, verticalized, hollow and equipped with an upper connection for the infuser and a lower connection for the adhesive applicator set, both with mechanical coupling to each other and to the system. user industry. However, it happens that these conventional housings, due to their internal structure of leakage of the adhesive medium combined with the machining (or casting) model applied in their construction, create "blind corners" in their internal structure and end up requiring short intervals of use. continuous interspersed with cleaning procedures (which can take several hours), in order to maintain the same flow of application of the adhesive medium in the production process. The applied technology that resulted in this patent document provides longer service intervals without the need for frequent maintenance and cleaning procedures.

Summary of the Invention

Patent for the housing assembly of an edge gluer that uses "Hot-Melt" Reactive Polyurethane (PUR) adhesives with an infusion system, comprising two elongated and vertical parts where the infuser is coupled. The upper and lower parts of the anti-residue housing are also perfectly coupled mechanically, without the need to use specific gaskets or adhesives. Its construction engineering process using negative machining and electro-erosion technologies, both precision, guarantee the perfect flow of the liquefied and heated adhesive inside the upper and lower parts to the adhesive applicator. The fixation of the complete equipment in the user's production line occurs through standardized mechanical connection and can have different configurations, according to the characteristics of the user's production line, positioning the equipment to the left, to the right or centralized in relation to the user's production line. to the part that will receive the sticker.

As the heated liquefied adhesive is transferred from the nozzle to the applicator system by inertia through the equipment housing that is coupled above the infusion system and below the application mechanism, it is a fact that after a certain number of hours of equipment use, in the conventional housing, there is the generation of adhesive residues that stick to the interior of the equipment housing, no matter how hot it is, compromising the flow of the adhesive that runs through its interior by inertia. In order to clean the parts that make up the collar of the collar, it is necessary to stop the use of the equipment (if the company has a spare collar, replace the equipment in use with the spare one in order not to completely stop the production line with the procedure cleaning) and wait for the necessary cooling time for its dismantling, to then carry out the aforementioned internal cleaning of the melter carcass. The equipment is reassembled and installed on the production line, which will need to be stopped again for its replacement.

Another problem that can occur is that, with the deposit of residues in the region where the upper and lower parts of the melter housing are fitted, if the maintenance technician of the company that uses the equipment does not take due care in its disassembly, compromise the fit of the component parts, causing future sealing problems or even rendering the equipment housing unusable.

In view of these problems and in order to overcome them, while seeking to bring greater practicality to the use of the equipment by users and, also, seeking to obtain the longest possible time interval between maintenance for cleaning, the housing was developed anti-residues for edge melters using "Hot-Melt" Reactive Polyurethane (PUR) adhesives, object of the present patent, which consists of a new project for the internal structure of the melter carcass in order to eliminate the problem of residue of sticker inside. The new internal design, built with precision negative machining processes and internal finishing carried out with precision electro-erosion, provides perfect flow of the liquefied adhesive by heating the infuser, illustrated by Fig. 4 and Fig. 5, which are mechanically coupled together and precisely. In the upper part of Fig. 4 it is possible to visualize the mechanical coupling of the adhesive infuser and in its lower part, through a small positive chamfer obtained through micrometric precision machining, it is coupled to Fig. 5, which is the lower housing, in fitting area with edge obtained through a milling process with micrometric precision, which provides a perfect mechanical fit between the parts. In the lower housing, the adhesive is driven by a slight curve with a positive trend and continuous flow to the applicator system, which transfers the adhesive to the piece that receives the liquefied and heated adhesive for the respective bonding. The lower housing is attached to the user's industrial equipment where the melter set will be used.

The unprecedented layout applied to the inside of the gluer housing, where the liquefied adhesive by heating moves through inertial movement, solves the inconveniences discussed above, since it prevents the formation of the aforementioned adhesive residues and practically eliminates the need for cleaning after certain hours. of use of the gluing equipment in the production line, as with the conventional carcass model. In this conventional model, according to the number of hours of use, there is a specific type of cleaning that needs to be carried out.

On the other hand, the preventive maintenance procedures foreseen according to the manufacturer's manual become much simpler because, since there are no adhesive residues deposited inside the equipment's housing, its preventive maintenance will be much faster. In addition, the possibility of a technician damaging the equipment housing with dismantling tools is reduced to practically zero, since it will not offer resistance to the decoupling of its mechanically coupled parts due to the fact that it does not have adhesive residues in the connections.

The following figures seek to exemplify the component parts of the equipment. As shown in the figures above, the anti-residue carcass model for edge gluer that uses "Hot-Melt" Reactive Polyurethane (PUR) adhesives, object of this patent, consists of an elongated, vertical and divided structure in two parts, both built with precision negative machining processes and internal finishing carried out with precision electro-erosion, which gives them perfect flow of the liquefied adhesive by heating through the nozzle.

Fig.1

[Fig. 1] Illustrates the edge gluer equipment that uses "Hot-Melt" Reactive Polyurethane (PUR) adhesives.

Fig.2

[Fig. 2] It brings, specifically, also for illustrative purposes, the two parts of the equipment housing also mechanically coupled, whose target of this patent is an improved model that does not accumulate adhesive residues inside, a situation that occurred until then with all carcasses of equipment models in this category.

Fig.3

[Fig. 3] The exploded view of the equipment is observed, where it is possible to visually identify the two component parts of the mechanically coupled housing highlighted, demarcated with an asterisk (*).

Fig.4

[Fig. 4] In the upper part of this figure, it is possible to visualize the mechanical coupling of the adhesive infuser and in its lower part, through a small positive chamfer obtained through micrometric precision machining.

Fig.5

[Fig. 5] Lower housing, in a fitting area with an edge obtained through a milling process with micrometric precision, which provides a perfect mechanical fit between the parts. The lower housing is attached to the user's industrial equipment where the melter set will be used. It also contains the adhesive applicator.

Fig.6

[Fig. 6] Upper casing equipment - detailed internal view where it is possible to observe its internal design that provides adhesive flow without possible residue deposits

Fig.7

[Fig. 7] Lower housing of the equipment - detailed internal view where it is possible to observe its internal design that provides adhesive flow without any residue deposits

The equipment object of this patent is a component part of the edge gluer equipment that uses adhesives of the "Hot-Melt" Reactive Polyurethane (PUR) type specifically, not being compatible with other bonding technologies that use other types of adhesive media.

The present patent refers to the sector of machinery for manufacturing furniture, doors and openings and, more specifically, the modality of manufacturing equipment for gluing edges in the manufacture of parts for furniture, doors and openings, intended for use in homes. , offices, factories and buildings of different types, aiming to simplify the edge bonding systems, optimizing the consumption of the electrical energy network and the space occupied by the equipment.

In this sense, edge bonding systems that use "Hot-Melt" Reactive Polyurethane (PUR) adhesives use prefusion systems, which provide a liquefaction of the adhesive medium for subsequent transfer to the heated adhesive application system itself, to the surface that receives the finishing edge of the sides of the sheet.

Effectively, the present invention aims to protect the gluer's anti-residue carcass, which will work with better performance than the usual ones, as frequent interruptions will not occur. As the wooden pieces pass through the gluer applicator, the prefuser will have brought the adhesive to the exact temperature for application, which, in turn, liquefied and heated, descends by inertia through the anti-residue housing and goes to the adhesive applicator, where it is deposited in exact amount on the part in a specific place and the production process follows its course.

The housing with such construction can be obtained with different configurations, according to the user's need, since different equipment and production lines may require the housing to position the gluer applicator to the left, right or centralized in relation to the part that will receive the sticker. This configuration will vary depending on the user's production line configuration.

Not applicable.

Patent Literature

This patent application is an innovation of a component part of the patent application already filed with the Brazilian National Institute of Industrial Property (INPI) of the same ownership of this application.

BR 10 2016 001031 4

Non-Patent Literature

Not applicable

Claims

The anti-residue casing of edge gluer with integrated nozzle, comprising the upper part where the nozzle for "Hot-Melt" Reactive Polyurethane (PUR) type adhesives is mechanically coupled (1), where in its lower part (2), through small positive chamfer (7) obtained through micrometric precision machining, it is also mechanically coupled to the lower housing of the equipment (3) in a fitting area with an edge (9) obtained through a milling process with micrometric precision, which provides a perfect mechanical fit between the parts, without the need to use any gaskets or secondary adhesives for the correct mechanical coupling and sealing. The lower housing has a structure for connection (4) of the gluer with the equipment of the user's production line, as well as the system for applying the adhesive used (5). The anti-residue housing is characterized by the fact that the internal structure (6) of both parts of the melter housing (upper and lower) were developed using non-traditional machining technologies that allow construction without sharp corners such as negative precision machining and finishing. internally carried out through precision electro-erosion, allowing the correct flow (6) of the liquefied adhesive medium by heating through the infuser, as exemplified by the detailed internal views of the upper housing in Fig. 6 and of the lower housing Fig. 7. After the HotMelt adhesive medium Liquefied and heated Reactive Polyurethane (PUR) enters the cavity of the upper casing in (6), it will descend by inertia, passing the lower window (2) of the upper part of the casing, and which gives access to the lower part of the anti-residue casing of the gluer, which is mechanically coupled to the lower housing, where the liquefied and heated adhesive is driven by a slight curve (8) with a positive trend and flow c to the applicator system (5), which transfers the adhesive to the piece that receives the liquefied and heated adhesive for the respective bonding.