Vacuum interface, and sanding and vacuum equipment including such an interface
The suction interface addresses the issue of sander degradation from fine dust by efficiently extracting dust without passing through the sander, allowing cost-effective sanding on materials like plaster.
Patent Information
- Application Number
- FR2023000723
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2023-01-26
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2043-01-26
AI Technical Summary
Mechanical sanders struggle with rapid degradation due to fine plaster dust infiltration, especially in models lacking specific protection, leading to increased costs for dust-resistant models.
A suction interface interposed between the oscillating plate and abrasive sheet, featuring a hook and loop system with a flexible, deformable body that allows efficient dust extraction without passing through the sander, using high and low rigidity sections to transmit vibrations and facilitate detachment.
Enables mechanized sanding with dust extraction, protecting the sander from fine dust without the need for additional dust protection, reducing the risk of degradation and maintaining operational efficiency.
Smart Images
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Abstract
Description
Title of the invention: A suction interface, and sanding and suction equipment comprising such an interface
[0001] This disclosure relates to a suction interface, as well as to sanding and suction equipment comprising such a suction interface.
[0002] The present disclosure is further related to a sanding process implementing a suction interface according to the present disclosure. technical field
[0003] The present disclosure relates to the field of mechanical sanders, typically electric or pneumatic, which include an oscillating pad driven by a motor in the sander. In such a sander, the oscillating pad is configured to be removably attached to an abrasive sheet by means of a hook and loop system, which allows for easy replacement of the abrasive sheet when worn.
[0004] By use, the oscillating pad of the sander comprises a first part including hooks, and the abrasive sheet has a second part including loops configured to grip the hooks of the oscillating pad. The first part and the second part form the two parts of the hook and loop system. Previous technique
[0005] Sanding operations generate large quantities of sanding dust, and it is also known from the prior art of mechanical sanders equipped with a suction system configured to collect sanding dust through the oscillating plate of the sander, with a view to its evacuation to a storage system and according to a suction flow typically passing through the oscillating plate of the sander.
[0006] Such sanders make it possible to reduce the amount of dust suspended in the ambient atmosphere, but also to reduce the cleaning operations after sanding operations.
[0007] Mechanical sanders according to this prior art may, however, have certain limitations in use, particularly with regard to plaster dust. Due to their fineness, plaster dust can quickly infiltrate the components, especially electrical ones, and cause rapid degradation of the sander, even leading to its total failure.
[0008] It is thus commercially available: - a first group of mechanical sanders, without specific protection against plaster dust, the instructions for which explicitly prohibit its use on plaster, and - a second group of mechanical sanders, which allow such use because they include specific protections for plaster dust.
[0009] Because of these protections, the sanders in the second group are significantly more expensive than those in the first group.
[0010] According to the inventor's findings, there is a need for a mechanized, oscillating-plate sanding and dust extraction system suitable for sanding materials with very fine dust, such as plaster, at a lower cost. Summary
[0011] This disclosure improves the situation.
[0012] A suction interface is proposed, configured to be interposed between a mechanical sander comprising an oscillating plate and an abrasive sheet capable of being fixed by a hook and loop system having a hook and loop couple comprising, on the one hand, a first part having hooks, and on the other hand, a second part having loops, and wherein the first part having the hooks is integral with the oscillating plate and the second part having the loops is integral with the abrasive sheet, said suction interface comprising a body having a first surface, and a second surface, opposite the first surface and in which: - the first surface is provided with a third part of a self-gripping system comprising loops configured to grip the hooks of the first part attached to the oscillating plate and - the second surface is equipped with a fourth part of a self-gripping system comprising hooks configured to grip the loops of the abrasive sheet and in which the body includes an internal recess opening, on the one hand, onto a surface of the body other than the first surface and the second surface, at the level of a suction mouth intended to be connected to a suction source, and on the other hand, through one or more vents on the second surface, configured to allow the suction of sanding dust emanating from the fourth part when the abrasive sheet, attached to the fourth part, is set into vibration by the oscillating plate of the mechanical sander attached to the third part.
[0013] The suction interface according to the present disclosure advantageously allows the implementation of a mechanized sanding process for which the sanding dust sucked up by the suction interface is evacuated, without passing through the mechanical sander which is therefore protected from the dust.
[0014] It becomes possible to use any sander, even those that are not equipped with protection against fine dust such as plaster dust.
[0015] The features described in the following paragraphs may optionally be implemented independently of each other or in combination with each other:
[0016] - the body is a flexible, deformable body, configured so as to allow a de The loops of the third section, and the hooks of the first section attached to the oscillating plate, are progressively engaged by curving the first surface and the third section containing the loops. This arrangement advantageously limits the effort required to disengage the loop / hook pairs distributed between the first section attached to the oscillating plate of the sander, on the one hand, and the third section attached to the first surface of the interface body, on the other, compared to a situation where all the loop / hook pairs would have to be disengaged simultaneously, requiring a much greater effort.
[0017] - the body may comprise several sections of different rigidities, including at less than the first sections, of high rigidity, each extending from the first surface to the second surface, said first sections, of high rigidity, configured to transmit the oscillations / vibrations from the oscillating plate to the abrasive sheet, between which are intercalated, second sections of low rigidity, namely of less rigidity than the first sections, said second sections configured to permit the deformation of the body to ensure said curvature of the first surface.Such an arrangement advantageously ensures good transmission of vibrations from the first interface surface to the second interface (without significant damping) thanks to the high rigidity of the first sections, while allowing deformation of the interface and the first surface and therefore of the third part, to allow the progressive uncoupling of the hook / loop pairs, thanks to the lower rigidity of the second sections.
[0018] According to one embodiment: - the said first sections have a first density in particular between 35kg / m3 and 55kg / m3, such as 45 kg / m3, - said second sections have a second density lower than the first density, in particular between 15 kg / m3 and 35 kg / m3, such as 25 kg / m3.
[0019] According to one embodiment, the body having a Z-direction in thickness extending between the first surface and the second surface, a longitudinal X-direction extending between a third surface and a fourth surface and a transverse Y-direction between a fifth surface and a sixth surface, and wherein the first sections and the second sections are arranged alternately, along the transverse direction, preferably in a parallel manner with each other.
[0020] According to one embodiment, the body comprises one or more plastic foams, in particular urethane foam and / or polyethylene foam. Polyethylene foam may be chosen for the first sections with high rigidity, and urethane foam for the second sections with low rigidity.
[0021] According to one embodiment, the internal recess can extend along a central portion of the body, and the vents open onto a central area of the second surface and in which the fourth part comprises a base thick greater than 1 mm, the fourth part having a network of through grooves, configured to distribute the suction, the grooves extending from the central area comprising the vent(s), in radial directions, to the periphery of the central area.
[0022] According to one embodiment, said internal recess and the vent(s) are arranged in a central section of the body within one of the first high-rigidity sections. Such an arrangement makes it possible to limit the loss of rigidity associated with the presence of the recess and the vent(s).
[0023] According to one embodiment, the loops of the third part are distributed along the length and / or width of the third part, according to a plurality of discontinuous attachment zones, regularly distributed along the length and / or width of the third part. Such an arrangement advantageously limits the force required to detach the loop / hook pairs distributed between the first part attached to the oscillating plate of the sander, on the one hand, and the third part attached to the first surface of the interface body, on the other.
[0024] According to a second aspect, the present disclosure relates to sanding and dust extraction equipment comprising a dust extraction interface as described herein, and a flexible hose configured to connect to the dust extraction inlet, preferably by inserting the hose into the inlet. In such a case, the connection between the hose and the dust extraction inlet can be ensured by the insert, which is preferably an elastic insert, taking advantage in particular of the flexibility of the hose and / or the body of the dust extraction interface.
[0025] According to one embodiment, the equipment further comprises said mechanical sander including said oscillating plate.
[0026] This disclosure also relates, according to a third aspect, to a sanding process comprising: - the supply of a mechanical sander comprising an oscillating pad and the supply of an abrasive sheet capable of being fixed by a hook and loop fastening system having a hook and loop fastener comprising, on the one hand, a first part comprising hooks, and on the other hand, a second part comprising loops, and wherein the first part comprising the hooks is attached to the oscillating plate, and the second part containing the loops is attached to the abrasive sheet, - the provision of a suction interface according to this disclosure, - the attachment of the first surface of the suction interface body by hooking the loops of the third part to the hooks of the first part attached to the oscillating plate, - the second surface of the suction interface body is fixed by hooking the hooks of the fourth part onto the loops of the second part attached to the abrasive sheet, - a connection of the suction nozzle to a suction source, - an activation of the sander and a vibration of the oscillating plate, - a sanding of a surface, with a suction flow of the sanding dust generated by the oscillations of the abrasive sheet through the vent(s), within the internal recess, then through the connection to a dust storage area, without passing through the mechanical sander.
[0027] According to one embodiment of the sanding process, the sanded surface is plaster. Brief description of the drawings
[0028] Other features, details and advantages will become apparent upon reading the detailed description below, and upon analysis of the accompanying drawings, on which: Fig. 1
[0029] [Fig. 1] is a view of equipment comprising a mechanical sander including an oscillating plate comprising a first part including hooks, an abrasive sheet including a second part including loops, and a suction interface interposed between the oscillating plate and the abrasive sheet. Fig. 2
[0030] [Fig.2] is an exploded view of the suction interface, comprising: - a body, roughly parallelepiped-shaped, presenting six surfaces (or sides) from the first to the sixth surface, - a third, upper part, comprising loops configured to grip onto the hooks of the first part attached to the oscillating plate, the loops of the third part distributed along several discontinuous attachment zones, - a fourth, lower part comprising hooks configured to grip onto the loops of the second part attached to the abrasive sheet, and a network of through grooves intended to distribute the suction over the surface of the abrasive sheet, from the vent(s) in the central part of the second surface of the body of the suction interface. Fig. 3
[0031] [Fig.3] is a cross-sectional view of the suction interface, illustrating the internal recess, opening, on the one hand, at the level of a suction mouth, intended to receive a flexible hose by insertion, and on the other hand, into one or more vents on the second surface of the body. Fig. 4
[0032] [Fig.4] is a view of the interface illustrating in particular different sections of the body, comprising first sections, with high rigidity, and second sections, with low rigidity. Fig. 5
[0033] [Fig.5] is a view of the fourth part, thick, preferably of thickness su greater than 1mm being provided with a network of through grooves, configured to distribute the suction, the grooves extending from the central area containing the vent(s), in radial directions, to the periphery of the central area, the three vents being respectively associated with through grooves of the fourth part which extend respectively, from the vents, over the central area, and to the periphery to distribute the suction over an area greater than the central area and preferably over a major part of the surface of the abrasive sheet. Fig. 6
[0034] [Fig.6] is a view of a second embodiment in which the body is in flexible foam such as polyethylene foam sufficiently rigid to ensure transmission of vibrations between the first surface and the second surface, while allowing slight deformation to permit the release of loops and hooks between the oscillating plate and the third part of the body of the suction interface. Description of the implementation methods
[0035] This disclosure relates to a suction interface 1 configured to be interposed between a mechanical sander PE comprising an oscillating pad PT and an abrasive sheet FA that can be attached by a hook and loop system. The mechanical sander may be an electric or pneumatic sander, providing vibration of the pad by a motor (typically pneumatic or electric).
[0036] The self-gripping system comprises a self-gripping couple comprising, on the one hand, a first part PI comprising hooks Cr, and on the other hand, a second part P2 comprising loops Bel.
[0037] The first part PI, comprising the hooks, is fixed to the oscillating plate PT, and the second part P2, comprising the loops Bel, is fixed to the abrasive sheet FA, so that it is conventionally possible to fix the abrasive sheet FA to the oscillating plate by hooking the loops of the second part onto the hooks Cr of the first part PI, and according to the state of the art well known in itself of such sanders.
[0038] Said suction interface 1 according to this disclosure comprises a body 10 having a first surface SI, and a second surface S2, opposite the first surface SI. The first surface SI is provided with a third part P3 of a self-gripping system having loops Bel configured to grip the hooks Cr of the first part PI integral with the oscillating plate and the second surface S2 is provided with a fourth part P4 of a self-gripping system having hooks Cr configured to grip the loops Bel of the second part P2 of the self-gripping sheet FA.
[0039] The interface body includes an internal recess 11 opening, on the one hand, onto a surface of the body, typically other than the first surface SI and the second surface S2, at the level of a suction mouth 12 intended to be connected to a suction source, and on the other hand, through one or more vents 131, 132, 133 on the second surface S2, the vent(s) configured to allow the suction of sanding dust emanating from the fourth part P4 when the abrasive sheet attached to the fourth part is vibrated by the oscillating plate PT of the mechanical sander, attached to the third part P3.
[0040] The interface according to this disclosure advantageously enables the implementation of a sanding process comprising: - the supply of a PE mechanical sander comprising an oscillating plate PT and the supply of an abrasive sheet FA capable of being fixed by a self-gripping fastening system having a self-gripping couple comprising, on the one hand, a first part PI comprising hooks Cr, and on the other hand, a second part comprising loops Bel, and in which the first part PI comprising the hooks is integral with the vibrating plate PT and the second part P2 comprising the loops Bel is integral with the abrasive sheet FA, - the provision of a suction interface as described in this disclosure, - a fixing of the first surface SI of the body 10 of the suction interface by gripping the loops Bel of the third part P3 to the hooks Cr of the first part PI integral with the oscillating plate, - a fixing of the second surface S2 of the body 10 of the suction interface by hooking the hooks of the fourth part P4 to the loops Bel of the second part P2 which is integral with the abrasive sheet FA, - a connection of the suction nozzle 12 to a suction source, - activation of the sander and vibration of the oscillating plate, - sanding of a surface, with a suction flow of sanding dust generated by the oscillations of the abrasive sheet FA through the vent(s) 131, 132, 133, within the internal recess 11, then through the connection to a dust storage area, without going through the mechanical sander.
[0041] Thus, the suction interface according to the present disclosure and the method implemented allows the implementation of mechanized sanding by the vibrations of the sander, and the implementation of a dust suction flow, and its evacuation to a storage area, without the dust flow passing through or crossing the mechanical sander.
[0042] The suction interface and the sanding process find particular application when the surface being sanded is plaster. It then becomes possible to sand plaster with dust extraction, even with a mechanical sander model that does not have any protection to shield the internal components of the sander (i.e., electric motor or other) from plaster dust.
[0043] According to one embodiment, the internal recess 11 extends along a central portion of the body, and the vents 131, 132, 133 open onto a central area of the second surface S2.
[0044] According to one embodiment, the fourth part P4 comprises a thick base, preferably with a thickness greater than 1 mm, the fourth part P4 being provided with a network of through grooves Ra, configured to distribute the suction, the grooves extending from the central area containing the vent(s) 131, 132, 133, in radial directions, to the periphery of the central area. Thus, in [Fig. 5], it can be seen that the three vents 131, 132, and 133 are respectively associated with through grooves of the fourth part P4 which extend respectively, from the vents, over the central area, and to the periphery to distribute the suction over an area larger than the central area and preferably over a major part of the surface of the abrasive sheet.
[0045] According to one embodiment, the interface body is a flexible, deformable body, configured so as to allow a progressive detachment of the loops Bel of the third part P3, of the hooks Cr of the first part PI attached to the oscillating plate PT, by a curvature of the first surface SI and of the third part P3 comprising the loops Bel.
[0046] Such a curvature of the first surface SI, typically initially flat in its rest position, ensures a gradual disengagement of the loops and hooks between the first part PI and the third part P3, namely that different loop / hook pairs detach one after the other, and not all simultaneously. The force required to disengage the interface from the oscillating plate by such a gradual disengagement is significantly less than the force required to disengage the interface from the oscillating plate when the loop / hook pairs are disengaged simultaneously. It becomes easier for the user to disengage the suction interface from the oscillating plate which is typically a rigid element.
[0047] According to such an embodiment, the body 10 of the suction interface 1 can comprise several sections of different stiffnesses, including at least first sections Sell, Sel2, Sel3, with high stiffness, each extending from the first surface SI to the second surface S2, said first sections configured to transmit the oscillations / vibrations from the oscillating plate PT to the abrasive sheet FA, between which are intercalated, second sections Se21, Se22 with low stiffness, of less stiffness than the stiffness of the first sections, configured to allow deformation of the body to ensure said curvature of the first surface SI, and of the third part P3.
[0048] According to one embodiment, said first sections Sell, Sel2, Sel3 have a first density, in particular, between 35 kg / m3 and 55 kg / m3, for example 45 kg / m3, and said second sections Se21, Se22 have a second density, lower than the first density, between 15 kg / m3 and 35 kg / m3, for example 25 kg / m3. The first and second sections may be made of the same material, in particular a plastic foam, having different densities, or of different materials, in particular several plastic foams.
[0049] The function of the first sections Sell, Sel2, Sel3 is to transmit the oscillations / vibrations from the oscillating plate PT to the abrasive sheet FA: for this purpose, these first sections Sell, Sel2, Sel3 have a greater rigidity than the second sections in order not to dampen vibrations transmitted from the first surface SI to the second surface S2. Such damping would impair the efficiency of the mechanical sanding.However, such rigidity is too great to ensure easy and effortless deformation of the first surface SI for the purpose of progressively disengaging the loop / hook couples between the oscillating plate PT and the first surface SLA. Conversely, the rigidity of the second sections Se21, Se22 is not optimal in itself for ensuring the transmission of mechanical vibrations between the first surface SI and the second surface S2, but allows the body to be easily deformed with less effort to ensure the progressive disengaging of the hook / loop couples.
[0050] According to one embodiment, the suction interface having a Z-direction in thickness extending between the first surface S1 and the second surface S2, a longitudinal direction X extending between a third surface S3 and a fourth surface S4 and a transverse Y-direction between a fifth surface S5 and a sixth surface S6. The body of the suction interface may be a parallelepiped, as a non-limiting embodiment.
[0051] It is noted that the first sections Sel 1, Se 12, Se 13 and the second sections Se21 and Se22 can be arranged, preferably in parallel, alternately along the transverse direction Y as illustrated in Figures 1, or along the longitudinal direction X according to an example not shown. For example, in the embodiment illustrated in the figures and more generally: - the first sections Sel 1, Sel2, Sel3, with high rigidity, are three in number, and include a central section Sel2, and two lateral sections Sel, Sel3, distributed on either side of the central section Se 12, - the second sections Se21, Se22, with low rigidity, are two in number, with a first section Se21 with low rigidity interposed between the central section Se 12, and a first, marked Sell, of the two lateral sections with high rigidity, and a second section Se22, with low rigidity, interposed between the central section Se 12, and a second marked Sel3n of the two lateral sections with high rigidity.
[0052] According to one embodiment, the body may comprise one or more plastic foams, in particular one or more foams, in particular urethane foam and polyethylene foam. Polyethylene foam may be used for the first sections Sel 1, Sel 2, Sel 3 with high rigidity, for example with a density of 45 kg / m³, and urethane foam for the second sections Se 21, Se 22 with low rigidity, for example with a density of 25 kg / m³.
[0053] According to one possible manufacturing method, the body having the first sections Sell, Sel2, Sel3 and the second sections Se21, Se22 can be obtained by alternating layers of material, bonded together, of different densities (in particular, said first density and second density). The body can be obtained by cutting along cutting planes perpendicular to the bonding surfaces between the layers. The material can be a plastic foam, in particular a urethane foam.
[0054] According to one embodiment, said internal recess 11 and the vent(s) 131, 132, 133 are arranged in a central section Sel2 among the first high-rigidity sections Sell, Sel2, Sel3. The size of the internal recess 11 is thus limited to one of the central sections, so as not to reduce the rigidity of the body as much as possible.
[0055] According to one embodiment, the loops Bel of the third part P3 can be distributed in particular regularly along the length and / or along the width of the third part P3, along a plurality of discontinuous attachment zones Za, in particular regularly distributed along the length along the X direction and / or along the width of the third part along the Y direction, with loop interruptions present.
[0056] Generally, and particularly as illustrated in [Fig.2], it can be noted that the attachment zones Za can be interrupted, alternately, for example regularly according to: - the longitudinal X direction by first bands B1 devoid of loops Bel, said first bands B1 spaced in particular regularly along the transverse Y direction, - the transverse Y direction by second bands B2, devoid of loops Bel, said second bands B2 spaced in particular regularly along the longitudinal X direction.
[0057] Loop interruptions facilitate the gradual unwinding of the loops Bc of the third part P3. Such a means can be used alone, or in combination with the flexible deformable body configured to ensure a curvature of the first surface SI to ensure such gradual unwinding.
[0058] According to one embodiment, the interface body may be made of the same material, for example, a polyethylene foam, in particular with a density of 45 kg / m³ or more generally between 35 kg / m³ and 55 kg / m³, substantially rigid and offering little flexibility, as shown in [Fig. 6]. According to the embodiment, the loops Bel of the third part P3 may be distributed in several longitudinal strips, oriented longitudinally along the X direction, spaced transversely, namely along the Z direction, to facilitate the detachment of the third part P3.
[0059] According to the other embodiment, in particular in [Fig.2], the loop interruptions can be combined with the flexible body comprising the first sections Sel 1, Sel2, Sel3 with high rigidity, for example made of polyethylene foam, in particular with a density of 45 kg / m3, configured to transmit vibrations and the second sections Se21, Se22, with low rigidity, made of urethane foam, in particular with a density of 25 kg / m3, configured to bend the third part P3, in order to reinforce such a progressive decoupling.
[0060] The present disclosure is further related to a sanding and suction equipment comprising a suction interface according to the present disclosure, and a flexible hose configured to connect into the suction mouthpiece, typically by inserting the hose into the mouthpiece.
[0061] The cooperation between the hose and the mouthpiece can be achieved through a tight fit between the hose and the preferably flexible material of the body. The hose is preferably held in the mouthpiece by a simple, tight fit, particularly by taking advantage of the elastic flexibility of the hose and / or the body of the suction interface. Alternatively, the connection can be made by means of a connection device as described in this Applicant's document FR 2 913 087, which comprises a flexible washer, for example made of foam, placed elastically around the end of the hose, and which ensures the connection with the mouthpiece face by the vacuum created when the hose is connected to the source. suction.
[0062] According to one embodiment, the suction interface according to this disclosure can be applied to non-mechanized, purely manual sanding. For this purpose, the equipment may include a gripping system comprising a handle and a fifth part provided with hooks configured to removably grip the loops Bel of the third part P3, in particular in place of the hooks of the oscillating pad of the mechanical sander. List of reference signs
[0063] - PE. Mechanical sander, - PT. Oscillating platform, - 1: Suction interface, - 10. Body (aspiration interface) - 11. Internal obsolescence, - 12. Suction nozzle, - 131, 132, 133. Events, - SI, S2, S3, S4, S5, S6. First surface, second surface, third surface, fourth surface, fifth surface and sixth surface, - Sell, Sel2, Sel3. First sections, with high rigidity, - S21, S22. Second sections, with low stiffness. - Ra. Through grooves, Hook and loop fastening system: PI. First part (brackets), P2. Second part (loops) P3. Third part (loops), P4. Fourth part (brackets), Beautiful (loops), Cr. Crochet
Claims
Demands
1. A suction interface (1) configured to be interposed between a mechanical sander (PE) comprising an oscillating plate (PT) and an abrasive sheet (FA) capable of being fixed by a hook and loop system comprising, on the one hand, a first part (PI) comprising hooks (Cr), and on the other hand, a second part comprising loops (Bel), and wherein the first part (PI) comprising the hooks is integral with the vibrating plate (PT) and the second part (P2) comprising the loops (Bel) is integral with the abrasive sheet (FA), said suction interface (1) comprising a body (10) having a first surface (SI), and a second surface (S2), opposite the first surface,and wherein: - the first surface (SI) is provided with a third part (P3) of a self-gripping system having loops (Bel) configured to grip the hooks (Cr) of the first part (PI) integral with the oscillating plate and - the second surface (S2) is provided with a fourth part (P4) of a self-gripping system having hooks (Cr) configured to grip the loops (Bel) of the abrasive sheet (FA) and wherein the body includes an internal recess (11) opening, on the one hand, onto a surface of the body other than the first surface (SI) and the second surface (S2), at the level of a suction inlet (12) intended to be connected to a suction source, and on the other hand, through one or more vents (131, 132, 133) onto the second surface (S2),configured to allow the aspiration of sanding dust emanating from the fourth part (P4) when the abrasive sheet (FA) attached to the fourth part (P4) is vibrated, by the oscillating plate (PT) of the mechanical sander attached to the third part (P3).
2. Suction interface according to claim 1, wherein the body is a flexible, deformable body, configured so as to allow progressive detachment of the loops (Bc) of the third part (P3), of the hooks (Cr) of the first part (PI) attached to the oscillating plate (PT), by curving the first surface (SI) and the third part (P3) comprising the loops (Bel).
3. A suction interface according to claim 2, wherein the body (10) comprises several sections of different stiffnesses, comprising at less than the first sections (Sell, Sel2, Sel3), with high rigidity, each extending from the first surface (SI) to the second surface (S2) configured to transmit oscillations / vibrations from the oscillating plate (PT) to the abrasive sheet (FA), between which are intercalated, second sections (Se21, Se22) with low rigidity, of less rigidity than the first sections, configured to allow deformation of the body to ensure said curvature of the first surface (SI).
4. Suction interface according to claim 3, wherein: - said first sections (Sell, Sel2, Sel3) have a first density, in particular between 35 kg / m3 and 55 kg / m3, such as 45 kg / m3 - said second sections (Se21, Se22) have a second density, lower than the first density, the second density in particular between 15 kg / m3 and 35 kg / m3 such as 25 kg / m3.
5. Interface according to any one of claims 3 or 4, wherein the body has a thickness Z direction extending between the first surface (S1) and the second surface (S2), a longitudinal X direction extending between a third surface (S3) and a fourth surface (S4) and a transverse Y direction between a fifth surface (S5) and a sixth surface (S6), and wherein the first sections (Sell, Sel2, Sel3), and the second sections (Se21, Se22) are arranged alternately along the transverse direction (Y), or alternately along the longitudinal direction (X).
6. Suction interface according to any one of claims 3 to 5, wherein the deformable body comprises one or more plastic foams, in particular urethane foam especially for said second sections and / or polyethylene foam especially for the first sections.
7. Suction interface according to any one of claims 1 to 6, wherein the internal recess (11) extends along a central portion of the body, and the vents (131, 132, 133) open onto a central area of the second surface (S2) and wherein the fourth part (P4) comprises a base thick greater than 1 mm, the fourth part having a network of through grooves (Ra), configured to distribute the suction, the grooves extending from the central area comprising the vent(s) (131, 132, 133), in radial directions, to the periphery of the central area.
8. Suction interface according to any one of claims 3 to 5 taken in combination with claim 7, wherein said internal recess (11) and vent(s) (131, 132, 133) are arranged in a central section (Sel2) selected from one of the first high-rigidity sections (Sell, Sel2, Se 13).
9. Suction interface according to any one of claims 1 to 8, wherein the loops (Bel) of the third part (P3) are distributed along the length and / or along the width of the third part, along a plurality of discontinuous attachment zones (Za), preferably distributed regularly along the length and / or along the width of the third part.
10. Sanding and suction equipment comprising a suction interface according to any one of claims 1 to 9, and a flexible hose (Ty) configured to connect into the suction mouthpiece by inserting the hose into the mouthpiece.
11. Sanding and vacuuming equipment according to claim 10 further comprising said mechanical sander (PT) comprising said oscillating plate (PT) comprising the first part (PI) with the hooks (Cr).
12. A sanding method comprising: - the provision of a mechanical sander (PE) having an oscillating plate (PT) and the provision of an abrasive sheet (FA) capable of being fixed by a hook and loop fastening system having a hook and loop couple comprising, on the one hand, a first part (PI) having hooks (Cr), and on the other hand, a second part having loops (Bel), and wherein the first part (PI) having the hooks is integral with the vibrating plate (PT) and the second part (P2) having the loops (Bel) is integral with the abrasive sheet (FA), - the provision of a suction interface according to any one of claims 1 to 9, - the fixing of the first surface (SI) of the body (10) of the suction interface (1) by hooking the loops (Bel) of the third part to the hooks (Cr) of the first part (PI) integral with the oscillating plate,- a fixing of the second surface (S2) of the body (10) of the suction interface by hooking the hooks (Cr) of the fourth part (P4) to the loops (Bel) of the second part (P2) integral with the abrasive sheet (FA), - a connection of the suction inlet (12) to a suction source, - activation of the sander (PE) and vibration of the oscillating plate (PT), - sanding of a surface, with a suction flow of sanding dust generated by the oscillations of the abrasive sheet (FA) through the vent(s) (131, 132, 133), within the internal recess (11), then through the connection to a dust storage area, without going through the mechanical sander.
13. Sanding method according to claim 12 wherein the sanded surface is plaster.