WO2009144340A2

WO2009144340A2 - Polyurethane sealing strip for a recessed joint, in the form of an irregular triangular prism, intended for the spray-application of a paint primer on adjacent surfaces

Info

Publication number: WO2009144340A2
Application number: PCT/ES2009/000292
Authority: WO
Inventors: Daniel CORTAVITARTE PÉREZ
Original assignee: Innoecor S.L.
Priority date: 2008-05-26
Filing date: 2009-05-26
Publication date: 2009-12-03
Also published as: WO2009144340A3

Abstract

The invention relates to a strip intended for the spray-application of primer on two adjacent surfaces separated by a recessed joint, said strip taking the form of an irregular right triangular prism with an isosceles-triangle-shaped base in which: two sides are equal and the remaining side forms the base, and the two inner angles formed by the base of the triangle with the two equal sides thereof measure between 65° and 75°, i.e. the angle of maximum penetration and maximum compression. The strip is made from expanded flexible polyurethane foam containing polyether with a regular fine-pore structure having a density of between 18 and 22 Kg/m³, enabling same to be produced using a blade cutting machine, and resistance to 40 % compression of between 3.8 and 4.8 kilopascals, thereby providing penetration and side compression force characteristics such that, for the above density, the strip can be held on the recessed joint without adhesives.

Description

9 000292

1 DESCRIPTION

Invention Title

POLYURETHANE HOLLOW SEAL CLOSURE BURLETE WITH IRREGULAR TRIANGULAR PRISM FORM FOR PRINTING BY PAINT RUNNING SPRAY ON ADJACENT SURFACES Technical sector

The proposed invention is intended for the industrial accessories industry for the preparation and painting of surfaces of all kinds of industrial appliances, vehicles, furniture and buildings. Prior state of the art

Within the traditional state of the art in the industry sector dedicated to spray painting, treatment or repair of surfaces such as car bodies, ships, vehicles, industrial appliances, furniture or buildings, it is necessary to use bands or tapes to avoid penetration of the primer of the paint rig or other treatment material inside the joint, but in the prior art or the joint covers produce the appearance of paint defects on the edges of the surfaces Adjacent that form the joint either have a high manufacturing cost or require a type of manipulation by the operator for their installation that significantly increases manufacturing costs by increasing their time dedication.

Sometimes the joints of all kinds of doors are covered by bands or adhesive tapes that prevent the penetration of the paint rig inside, but this requires a special treatment of the surface covered by the adhesive strip once removed to allow completing and finish the uniform finish of the paint or treatment rig to the edge, with the additional cost of labor and the defective finish that this entails.

WO02057024, PCT ES02 / 00022 (CORTAVITARTE) solves the problem with a flexible semi-rigid rubber wedge or weatherstrip with a precise polyhedral shape of hexagonal prism with lateral wings that snapped from the outside into the joint with the door closed and It is of high cost due to the nature of the rubber material it demands, so it is intended to be used either in treatments of higher quality and cost paint, or in those cases in which the joint is formed by two parallel planes of great thickness or length requiring the external introduction of a pressure

SUBSTITUTE SHEET (RULE 26) Weatherstripping with high compression and hardness. The proposed new invention solves the technical problem that until now. It involves the use of expanded low density polyurethane, so it differs substantially from WO02057024, PCT ES02 / 00022 (CORTAVITARTE) because it does not need to be made of a material with the characteristics of hardness, strength and flexibility of rubber, so It can be made of elastomeric materials such as the one now proposed that, in addition to their lower economic cost, have the advantage of being cut by hand by the operator in less time without using instruments, thus gaining speed and effectiveness in their placement and reducing costs Labor labor.

US 5939173 (VOSS) patent consists of an amorphous adhesive elastomeric filler body that is inserted into the joint and adheres to the frame to prevent penetration of paint into the joint but does not allow profiling of the paint rig in the edges or of the door or frame adjacent to the hollow joint. WO 9521700 (HILLS) patent consists of an amorphous elastomeric filler body that is inserted into the joint itself by being held by an elongated portion to the inner face of the door, but which does not produce the profiling or contouring of the paint on the outer edge of the frame nor in the outer edge of the door edge, because being amorphous does not produce an intersection with the. edge. In the invention that the isosceles triangular prism is proposed in addition to being supported without adhesives on the joint and closing it, when it protrudes it produces the effect of profiling or contouring the primer of the paint rig on the outer edge of both the frame and the door. The PCT patent ES2006 / 000484 (CORTAVITARTE) is a specific sealing weatherstrip for painting, not for priming paint rigs, with a higher economic cost of manufacture and a higher labor cost for its use than the patent now proposed, as the The previous patent allows the painting to be finished to the inner edge of the door edge by painting the door edge itself as required by the final finish of the paint while the proposed invention only prints the outer surface to be rigged to the outer edge. of the edge what is essential in the weatherstrip for the paint rig because the primer layer of the rig has to be delayed with respect to the edge of the subsequent paint layer so that the primer layer is then effortlessly and without additional time covered by paint and is not seen and it is therefore essential that in the primer or rigging the gasket that covers the hollow joint prevents the penet Ration of the rig not to the inside edge but

SUBSTITUTE SHEET (RULE 26) on the outside edge of the door and the frame, thus reducing the costs of grinding labor that are unavoidable in another case for sanding and cleaning the excessively sprayed rig, which is resolved by the patent that is now proposed, which by also using a single prismatic piece of homogeneous polyurethane instead of two pieces and it does not need to be glued to the wall of the hollow joint but it comes under pressure, it also reduces manufacturing costs and labor costs in its use. Patent US 005128176 (SCHMIDT) contemplates the shape of an equilateral triangular prism with an adhesive coating by which it adheres to the walls of the joint, in which case the material and the design could be indifferent for its fixation but that increases the dedication of time of the operator to fix the adhesive with the consequent cost of labor and although it provides in the abstract the possibility that an adhesive is not necessary in certain cases, however, in practice in the prior art there is no known material Lightweight, low cost and density like expanded polyurethane with chemical and physical properties and the exact design of the angles to penetrate the joint manually from the outside keeping their faces flat on the joint and thereby preventing its detachment or fall ensuring it time the lateral compression necessary for its support on the hollow joint and the cited patent does not define the material of which if the weatherstrip is constructed, nor its physical characteristics in case of being expanded polyurethane, nor does it determine its density and hardness, nor the necessary angles at the base of the triangle of the base of the prism so that it does not come off and at the same time have the lateral compression necessary to produce the closure of the hollow joint, so that it lacks characterizing elements to solve the technical problem with the polyurethane that arises in the current triangular prismatic weatherstrip when no adhesives are used and if they are used would increase costs of labor in manufacturing. Disclosure of the invention

After a research process of several years for the study and testing of the characteristics of the polyurethane material to be used, the present invention aims to solve the technical problem posed so far by the polyurethane for use as a polyhedric gasket for manual pressure installation without adhesives with non-amorphous flat geometric faces. intersection with the edges of a hollow joint to make it possible to profile your primer as a preliminary step to painting the adjacent surfaces of the joint. In fact, the flexible expanded polyurethane has had a great development in recent decades, is low cost and allows manual cutting

SUBSTITUTE SHEET (RULE 26) by the operator to adapt its length to the desired one, reducing the labor time for its application, but its use as a hollow gasket closure gasket has always been limited so far to use it as an amorphous filling material that does not allow profiling the priming of the rigging on the edges of the two surfaces of the joint by means of a polyhedral design with flat faces and has been used by adhering it to the walls of the joint not by pressure but by means of an adhesive because due to its low hardness and compression it has not been possible nor apply it under pressure on the joint maintaining the structure of the polyhedron with flat faces, nor use it to profile the edges of the hollow joint at the time of application of the primer layer of the paint, which requires that after applying the spray of The rigging layer is always necessary with a high cost of labor, the action of sanding the excess of the rig on the surface or sticking and then Apply adhesive tapes that prevent the primer from exceeding the edge of the edge or edge to be primed. The present invention is a sealing strip of a hollow joint for paint rig consisting of a longitudinal closing body susceptible to manual cutting without tools manually embedded in the joint without adhesives made of irregular triangular straight prism shaped whose base is a isosceles triangle in which the base of the triangle is that of its three sides unequal to the other two that are equal to each other, in which the two interior angles formed by the base of the triangle with the two remaining sides equal, must measure between 65 degrees and 82 degrees, to adapt to different types of joint without detaching, maintaining the necessary balance between penetration, - which is facilitated by a more acute angle - and lateral compression, - which requires a less acute angle -, constructed in foam of polyurethane expanded flexible polyurethane with regular fine pore structure with density between 18 and 22 Kilograms per cubic meter, dense d necessary to allow its production by knife cutting machines that do not produce dust in the factory discarding other type of thread machines that produce dust while satisfying the needs of penetration and lateral compression on the joint and with a hardness or resistance at 40% compression between 3.8 and 4.8 kilopascals to ensure the lateral compression force that makes it possible to lift without adhesives on the hollow joint, and the base of the base triangle having a length between 4 and 14 mm of the prism and a variable height according to the interior angle chosen for the base of the triangle of the base of the prism Io that determines that due to its shape and the physical properties of the matter thus defined, when introduced by the operator in the hollow joint by the vertex of the weatherstrip angle

SUBSTITUTE SHEET (RULE 26) formed by the two equal sides, it is supported on the joint by compression with the fair elasticity necessary so that while maintaining the simplicity of design that reduces its manufacturing cost, fill the gap to the bottom depending on the height of the triangle of The base of the prism with the necessary lateral compression so that it does not fall or detach from the joint unless it is removed by the operator and so that having precisely that density and hardness the lateral faces of the prism in contact with the edges of the hollow joint absorb the paint that is applied by spraying and prevent that density and hardness from passing the paint inside the joint allowing a regular cut or profile of the primer layer of the rig at the edge of the joint with a slight spray sprayed at the vertex retracted or delayed with respect to the edge at which the back coat of finished paint is to be finished, if necessary, that slight spray Very easy and fast to sand. The weatherstrip is introduced manually by pushing it towards the inside of the hollow joint leaving on the outside the side face of the prism that corresponds to the base of the triangle of its base, being possible to include as a handhold a semi-rigid band of cardboard, plastic or similar split in the central axis of the side face of the prism that is outside the joint to facilitate its penetration and its manual removal by means of that handle that facilitates the manipulation of penetration and adjustment of the weatherstrip in the hole. The prism may have made instead of the handle a cut in the central axis of the side face that is outside the joint to a point close to the angle or vertex formed by the two equal side faces that form the isosceles triangle in the base of the prism, so that after a first use of the weatherstrip the operator can manually open that slit and turn around the two bodies that are formed that will be clean of paint rig on its inner face to allow a second use of the weatherstrip on the board. Description of the drawings

Figure 1 shows the section of the irregular triangular straight prism of the elastomeric closure body of the joint (1), 1st door or plane perpendicular (2) to the inner face of the frame, the frame (3), the outer edge of the frame (4), the outer edge of the door (5) and the inner edge of the door (7).

DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION The best embodiment of the invention consists of a sealing strip of a hollow joint consisting of a longitudinal filling body without polyurethane adhesives in the form of an irregular triangular straight prism whose base is a triangle

SUBSTITUTE SHEET (RULE 26) isosceles in which the base of the triangle is that of its three sides unequal to the other two that are equal to each other, in which the two interior angles formed by the base of the triangle with the two remaining sides equal, measure 74 °, in whose case is adapted to 90% of the hollow joints that are observed in the primer of paint surfaces of the automobile sector, although the invention is not limited to it, since that is the angle that ensures maximum penetration in the joint under the manual thrust and at the same time the maximum compression with the described material, built in flexible polyurethane foam expanded in polyether base with regular fine pore structure with density between 18 and 22 Kilograms per cubic meter, density necessary to allow its production by Blade cutting machines in the factory while satisfying the needs of penetration and lateral compression on the joint and with a hardness or resistance to the 40% compression between 3.8 and 4.8 kilopascals to ensure the lateral compression force that makes it possible for the previous density to lift without adhesives on the hollow joint, and having a length of 9 millimeters the base of the triangle of the base of the prism which produces at the same time the sufficient different height in the triangle of the base of the prism which determines that due to its shape and the physical properties of the matter thus defined, when introduced by the operator in the hollow joint by the vertex of the angle of the weatherstrip formed by the two equal sides is supported on the joint by compression with the fair elasticity necessary so that while maintaining the simplicity of design that reduces its manufacturing cost, fill the gap to the bottom in order to . the height of the triangle of the base of the prism with the necessary lateral compression so that it does not fall or detach from the joint unless it is removed by the operator and so that the lateral faces of the prism in contact with the edges of the hollow joint they absorb the paint that is applied by spraying and prevent precisely because of that precise density and hardness the passage of the paint absorbed by the weatherstrip into the joint allowing a regular cut or profile on the outer edge of the joint, - not interior-, with a light spray at the vertex easy and quick to sand. Form of industrial exploitation The proposed patent is susceptible of industrial exploitation in the painting, varnishing and surface spray treatment sector.

SUBSTITUTE SHEET (RULE 26)

Claims

1. POLYURETHANE HOLLOW JOINT CLOSURE BURLETE WITH IRREGULAR TRIANGULAR PRISM PRINT FORM FOR PRINTING PAINT SPRAYING IN ADJECTIVE SURFACES consisting of a closing seal of a hollow joint formed by a flat surface perpendicular to another of the type of a door that closes on a frame or the like essentially characterized by being formed by an elastomeric closing body that is a longitudinal closing or filling body of polyurethane that is installed on the manually pressed joint without adhesives in the form of an irregular triangular straight prism whose base is an isosceles triangle in which the base of the triangle is that of its three sides uneven to the other two that are equal to each other, in which to ensure its support on the pressure joint the two interior angles formed by the base of the triangle with the two remaining sides equal, measures between 65 ° and 75 °, because that is the angle that ensures the maximum maximum penetration in the joint under manual thrust and at the same time the maximum compression with the described material, making it possible to lift on the joint without adhesives and which is constructed for this purpose in expanded polyurethane foam expanded in polyether base with structure regulate of fine pore with density between 18 and 22 Kilograms per cubic meter, density necessary to allow its production by cutting machines by knife in the factory that do not produce dust while satisfying the needs of penetration and lateral compression on the joint and with a hardness or resistance to compression at 40% between 3.8 and 4.8 kilopascals to ensure the lateral compression force that makes it possible for the previous density to support without adhesives on the hollow joint, and having a length between 4 and 14 mm the base of the triangle of the base of the prism with whose properties when introduced by the operator in the hollow joint one more gaskets according to the size of the gasket by the vertex of the angle formed by the two equal sides, the gasket is supported without adhesives on the compression gasket being manually applied to reduce labor costs, with the fair elasticity necessary for while maintaining the simplicity of design that reduces its manufacturing cost, close or fill the hole to the bottom depending on the height of the triangle of the base of the prism and at the same time have the necessary lateral compression so that it does not fall or detach from the joint unless it is removed by the operator and to ensure that the lateral faces of the prism in contact with the edges of the hollow joint absorb the primer of the paint applied by spraying

SUBSTITUTE SHEET (RULE 26) and prevent by its density and hardness the passage of the paint to the interior of the joint allowing a regular cut or profile on the outer edge of the joint with a light spray at the vertex easy and quick to sand.

2. POLYURETHANE HOLLOW SEAL CLOSURE BURLETE WITH IRREGULAR TRIANGULAR PRISM FORM FOR PRINTING BY PAINTING SPRAYING IN ADJECTIVE SURFACES according to the first claim essentially characterized in that the lateral face of the prism which is the base of the isosceles triangle base The prism has a slit in a straight line on its axis in which a semi-rigid band of a material such as cardboard, plastic or similar is firmly inserted and adhered, to manually facilitate the penetration of the weatherstrip into the hollow joint and its extraction.

3. POLYURETHANE HOLLOW SEAL CLOSURE BURLETE WITH IRREGULAR TRIANGULAR PRISM FORM FOR PRINTING BY PAINTING SPRAY IN ADJECTIVE SURFACES according to the first claim essentially characterized by having the central axis of the lateral side of the prism corresponding to the base from the triangle of each base of the prism a cut or groove to a point near the vertex of the angle formed by the two isosceles sides of the triangle, so that after a first use of the weatherstrip the operator can opt for reuse by opening the weatherstrip in two bodies and reversing the side faces that have penetrated the hollow joint in the previous use by two other rigging or paint cleaners.

SUBSTITUTE SHEET (RULE 26)