BE1019335A3 - METHOD AND DEVICE FOR MANUFACTURING A BRUSH. - Google Patents

Abstract

A device (1) for manufacturing a brush (2) has a cutting device (6) with a cutter (7) for cutting filaments (4) from the brush (2), which can be moved in the longitudinal direction of the brush (2). brush (2). The brush (2) is clamped on one side in a clamping device (17) with at least part of the filaments (4) of the brush (2) being radially supported by a brush guide (10) during cutting (Fig .1).

Description

The invention relates to a method for making a brush, wherein filaments are inserted between two sections of wire, the wire sections being then twisted and the filaments then cut to a length. desired with a milling cutter, the milling cutter being oriented with its axis of rotation transverse to the direction of extension of the wire sections and the milling cutter and the brush being moved against each other longitudinally with respect to the direction of extension sections of wire during the cutting of the filaments.

The invention also relates to a device for manufacturing a brush, the manufactured brush having two sections of wire which are twisted together and between which filaments are inserted, with a clamping device for holding the brush and a cutting device for cutting the filaments to a desired length, the cutter having a cutter and the clamping device and the cutter being designed to be movable against each other.

Such methods and devices are known and proven for the manufacture of various brushes, for example interdental brushes and / or mascara brushes, to give the brushes a desired contoured shape and / or to insert grooves in the direction longitudinal, therefore axial, by cutting the filaments. To give this profile, the brush is moved in its entirety in a movement back and forth in front of the milling cutter and against the blade for the treatment of a given length. To do this, it is necessary that the working plane of the cutter is oriented to understand the direction of extension of the wire sections. The axis of rotation of the cutter is therefore oriented transversely to this direction of extension.

The front end, so opposed to the handle of the brush, during use is particularly critical for the treatment because the two sections of wire should exceed at this end only minimally of the area of bristles with holes. filaments and therefore, this end barely provides a gripping surface for holding the brush during cutting. Maintaining, however, is necessary to prevent deflection of the brush during cutting.

The problem underlying the invention is to provide a method and a device for making a brush that can give a more simple profile to the filaments.

To solve this problem, it is provided according to the method described at the beginning that the brush is clamped on one side in a clamping device at one end of the wire sections and that during the cutting of the filaments, at least a portion of the filaments and / or the free end of the metal film is radially supported on a brush guide. The wire sections may be formed by the branches of a U-shaped bent wire. However, two separate wire sections may also be provided. The support of the filaments and / or the free end of the metal film away from the clamping device effectively prevents a deflection of the brush projecting from the clamping device during cutting and the filaments can be cut to the desired radial distance wire sections so that the desired profile shape results, hence the desired cross-section through the bristle area of the brush transverse to the longitudinal direction of the brush. With the support, the supported filaments are elastically deflected from their rest position. Part of the filaments may be disposed in an axial region and / or in an angular region of the brush. In this application, the radial and axial terms refer to the direction of extension of the sections of wire which coincides with the longitudinal direction of the brush, the axial direction coinciding with the direction of extension and the radial direction being perpendicular to the direction of extension.

The brush is thus supported by at least a portion of the filaments, and the brush can not deflect during cutting. You can now slowly enter the brush into the brush guide or move the brush guide.

For example, the supported portion of the filaments may be supported by the brush guide on the opposite side of the cutter during cutting of the free filaments so that the brush can not flex away from the cutter and its counterpart. blade.

Alternatively or additionally, it can be provided that the supported portion of the filaments is held on both sides of the milling cutter's working plane by the brush guide during the cutting of the free filaments to prevent lateral deflection of the brush out of the plane of the mill. strawberry work.

To produce the desired shaped shape, it is provided that the brush is rotated by a predefined or predefinable angle about the axis described by the direction of extension of the wire sections after cutting the filaments on one side of the brush and that the filaments are then cut on another side of the brush.

For example, the angle may be 180 °, 120 °, 90 °, 72 ° or 60 °, resulting in a flattened shape of two sides, a triangular shaped shape, a rectangular shaped shape, a pentagonal profiled shape or a hexagonal profiled shape.

To produce any profiled shapes, including uniformly or zigzag-wrap around the direction of extension of the wire sections, the clamping device may be adapted to rotate the brush about the axis described by the direction of rotation. extension of the wire sections during milling. In this case, a synchronization unit may be provided to synchronize the movement of advance of the cutter with the pivoting movement of the brush, for example a mechanical or electronic cam.

To produce spiral or zigzag shaped shaped shapes around the direction of extension of the wire sections, particularly spirally extending milling around the wire sections, provision may be made to rotate the brush around Tax described by the direction of extension of the wire sections during the cutting of the filaments on one side of the brush. In this case, the advancing movement of the cutter is preferably synchronized with the pivotal movement of the brush to produce the desired shape of the filaments.

It is particularly advantageous in this case that the filaments are supported on a bearing surface of the brush guide during cutting. This provides a uniform support through a plurality of filaments with which the individual filaments are not damaged and with which the brush is at the same time fixed in its position during cutting.

According to one embodiment of the invention, it can be provided that the radial distance of the bearing surface from the wire sections is adapted, after the pivoting of the brush, to the position of the ends of the filaments which then find in front of the strawberry. It is advantageous in this case that in the rotated position, the support can be performed via the already shortened filaments.

Alternatively, it can be provided that the brush guide is replaced before cutting the filaments in the rotated position of the brush. The replaced brush guide is thus adapted to the length of the filaments modified by the first cut, which is supported by the brush guide for subsequent cutting.

It is particularly advantageous that the wire sections are clamped on one side in the clamp and are gripped at the free end and twisted before the filaments are cut. It is advantageous in this case that the insertion of the filaments and the cutting of the filaments can take place in a machine.

In one embodiment of the invention, it can be provided that during cutting of the filaments, the cutter and the brush are further moved against each other in the radial direction. Tapered brush shapes and / or axially-changing profiles can thus be produced, in that the cutter is further moved radially, thus moving closer to or away from the sections of metal film. .

To solve the problem, it is provided for the device mentioned at the beginning that the clamping device has means for clamping the brush on one side at one end of the wire sections and a brush guide which radially supports at least part of the filaments and / or the tip of the free end is provided. It is advantageous in this case that the brush can not deflect during cutting although it is only clamped on one side. The end of the brush protruding from the clamping device is thus fixed, in that the supported filaments fix a defined distance of the wire sections relative to the brush guide.

It is preferably provided that the brush guide is open on the side facing the cutter and that the filaments which are to be sheared with the cutter protrude from the brush guide.

For example, it may be provided that the brush guide has a bearing surface for the supported filaments, which is disposed on the side of the brush opposite the cutter.

Alternatively or additionally, it may be provided that the brush guide has a support fork which grasps the filaments supported on both sides of the work plane of the cutter. The support fork may be one piece or multi-piece, the free legs of the support fork being disposed in the use position on opposite sides of the wire sections. The open end of the support fork is preferably oriented towards the tight side of the brush.

To produce profiled shapes that require several milling operations, it may be provided that the clamping device is arranged to pivot the brush about the imaginary axis described by the direction of extension of the wire sections of an angle. predefined or predefinable, in particular 180 °, 120 °, 90 °, 72 ° or 60 °.

For simple support of the filaments, it can be provided that a bearing surface is formed on the brush guide, bearing surface on which a portion of the filaments which are arranged outside the working region of the cutter, in particular, the ends of the filaments situated opposite the cutter bear radially during cutting. The brush guide may in this case form a recess in which the brush may be inserted, the recess having, in the use position, on the side facing the milling cutter, an opening from which the shearing filaments project from the brush introduced, while a portion of the filaments of the brush touch a bearing surface on an inner wall of the recess and are supported radially thereon.

Several compound shaped shapes, requiring several milling operations, can be produced when the position of the support surface is adjustable in the radial direction and adaptable to the position of the ends of the filaments located in front of the milling cutter and can be adapted.

Alternatively or additionally, it may be provided that the brush guide is replaceable.

According to one embodiment of the invention, an additional clamping device may be provided for the free end of the wire wire sections of the brush, the additional clamping device being designed to be pivotable about the axis described by the extension direction of the wire sections for twisting the wire sections clamped in the two clamps against the first clamp and can be pivoted. It is advantageous in this case that a change of the device is not necessary between different work steps.

Variable conical and / or axially changing shaped shapes may be produced when means are provided for moving the milling cutter and the brush against each other in the radial direction.

The device can also be configured as a multiple machine with several workstations arranged one behind the other. In this case, each treatment unit can have its own clamping device and a cutting device. A brush can then be transported in the various processing stations which are configured for example to perform different milling patterns. The arrangement of the treatment stations with respect to each other may be of the carousel or linear type.

After the milling treatment, the brush may be transmitted to a control device or to several control devices and / or brought to a packaging device.

The invention will now be described in more detail on the basis of exemplary embodiments but is not limited to the exemplary embodiments. Other exemplary embodiments result from the combination of the features of the claims with each other and / or with individual characteristics or several features of the exemplary embodiments.

As a schematic representation: FIG. 1 shows, in a representation of principle, the manufacture according to the invention of a brush, FIG. 2 shows, by way of example, various profiled shapes of brushes, FIG. 3 shows another device according to the invention for the 4 shows another device according to the invention for the manufacture of a brush and FIG. 5 shows a sectional representation of the device according to FIG. 4.

Fig. 1 shows, in a representation of principle, a sectional view of a device, designated in its entirety by 1, for producing a brush 2.

The brush 2 has a wire 3 which has at least two sections of wire twisted together, between which filaments 4 are inserted. The bristle zone with the filaments 4 extends almost to the tip 20 of the wire 3 and the end of the wire 3 opposite the tip 20 is cast in a brush handle 5.

The device 1 is equipped with a cutting device 6 which has a cutter 7 and a counter blade 8.

The cutter 7 rotates in a work plane which is in the plane of the drawing in FIG. 1 and can therefore shear filaments 4 by the rotational movement designated by 9 and cut them to a desired length.

The device 1 further has a brush guide 10 on which a recess 11 is formed, whereby the brush guide 10 partially surrounds a cylindrical space.

The recess 11 is open on the side facing the cutter 7 and thus forms an opening 12.

On its end facing the brush 2, the recess 11 opens into an insertion opening 13 through which the brush 2 with the filaments 4 can be introduced into the recess 11.

This axial displacement movement to introduce the brush 2 is indicated by an arrow 14.

When the brush 2 with the filaments 4 are arranged in the recess 11, the filaments 4 rest on the side of the inner wall 15 of the recess 11 which is opposite to the cutter 7 and which thus forms a bearing surface for the supported filaments 4.

In the position introduced into the recess 11, the filaments 4 radially supported in the recess 11 are slightly deviated from their right rest position.

If the brush 2 is disposed in the recess 11, the ends of the filaments 4 oriented towards the cutter 7 protrude from the opening 11 beyond the brush guide 10. These filaments 4 can thus be sheared and cut, the ends enveloping filaments capable of receiving a flat shape or any shape, for example bent or curved, depending on the shape of the blade on the cutter 7. These enveloping ends of the filament tips describe the profiled shape of the filaments 4.

Fig. 2 shows an exemplary arrangement of the various profiled shapes 16 which can be produced with the device 1 according to FIG.

1.

It can be seen from the form of the illustrated cross-sections or shaped shapes 16 that several milling operations are to be performed for manufacture.

For this purpose, the brush 2 is rotated by a predetermined angle about the axis described by the direction of extension of the wire 2 between two milling operations, in that the clamping device 17 on which the The brush is clamped from one side to one end of the wire 3 by its handle 5 turns in the manner indicated by the arrow 18.

The filaments 4 which have previously been cut with the cutter 7 and which therefore have a shorter length than the initial filaments 4 thus come into contact with the inner wall 15.

To compensate for this, the brush guide 10 is moved towards the cutting device 6 and is thus adapted to the contour of the cut filaments 4.

When the profiled shapes 16 respectively shown in FIG. 2 do not change in the direction of extension of the wire 3, the tips of the filaments 4 describe the envelope surface of a prism whose base surface is oriented towards the handle 5 and whose covering surface is oriented in the opposite direction to this one. When the profiled shapes 16 however rotate in the direction of extension of the wire 3 around this direction of extension, a twisted prism is then described by the free points of the filaments 4. This rotation can be uniform or zigzag, so with an increasing angle of rotation and then decreasing again depending on the axial position.

Fig. 3 shows, in a basic representation, a sectional view of another device 1 according to the invention for making a brush 2, similar or functionally similar parts being designated by the same reference numbers and not being again described. Here the explanations given for FIG. 1 are correspondingly worth.

The brush guide 10 is designed in the form of a finger in the embodiment according to FIG. 3 and is placed behind the filaments 4 of the brush on the opposite side to the mill not shown.

This brush guide 10 forms on the side facing the filaments 4 a flat support surface 15 on which a portion of the filaments 4 is supported.

The brush guide 10 is further provided with a bore 19 which receives the tip 20 of the wire protruding from the filaments 4 and fixes it during the cutting of the filaments 4. The free end of the wire is thus supported radially at the level of the wire. this tip 20 by the brush guide 10.

After the filaments have been inserted between the parallel wire sections of which the wire 3 is composed, the wire 3 is grasped at its tip 20 and twisted with a not shown clamping device. In doing so, the handle 5 remains tight in the clamping device 17. This results in the cylindrical outer contour of the filaments 4 of the brush 2.

Fig. 4 shows another device 1 according to the invention, in a representation of principle, in an axial sectional view. Fig. 5 shows a cross-section through the device 1 at the indicated cutting plane.

In FIGS. 4 and 5, similar parts are again designated as in FIG. 1 and reference is made to the description relating to FIG.

For better readability, the cutting device is not shown. In the view according to FIG. 4, this cutting device is in front of the plane of the drawing.

Device 1 for making a brush, shown in FIG. 4, has a brush guide 10 which is composed of a retainer 21 and a support fork 22.

A groove-shaped recess 11 forms a housing for the ends of the filaments 4 opposed to the cutter which rest against the inner wall 15 of the recess 11 and are supported radially.

The retaining device 21 carries two branches 23, 24 of the support fork 22. The branches 23, 24 are oriented here axially, therefore parallel to the direction of extension of the wire 3 and surround the filaments 4 and the wire 3 on both sides of the working plane of the not shown cutter, which is perpendicular to the plane of the drawing in FIGS. 4 and 5.

The edges of the branches made flat and flat, which are oriented towards the wire 3, penetrate the filaments 4 and spacing them from their position of rest by bending to support the filaments radially but laterally relative to the working plane of the strawberry.

The various filaments 4 visible in FIG. 5 are only shown as examples. Depending on the type of brush, the filaments 4 can also be arranged more densely.

The branches 23, 24 are connected together in a manner not shown, and the brush 2 is introduced, as shown, into the open end 25 of the support fork 22.

In the device according to Figs. 4 and 5, the device arranged in front of the plane of the drawing can be moved radially, so in FIG. 4 by bringing it closer or away from the plane of the drawing, to produce for example profiled shapes tapering along the brush 2 for the filaments 4.

The device 1 for manufacturing a brush 2 has a cutting device 6 with a cutter 7 for cutting the filaments 4 of the brush 2, which can be moved in the longitudinal direction of the brush 2. The brush 2 is clamped on one side in a clamping device 17, at least a portion of the filaments 4 of the brush 2 being radially supported by a brush guide 10 during cutting.

Claims (20)

A method of making a brush (2), wherein filaments (4) are inserted between two sections of wire (3), the wire sections (3) being then twisted and the filaments (4) subsequently cut to a desired length. desired length with a cutter (7), the cutter (7) being oriented with its axis of rotation transverse to the direction of extension of the wire sections (3) and the cutter (7) and the brush (2) being displaced against each other longitudinally with respect to the direction of extension of the wire sections 3 during cutting, characterized in that the brush is clamped on one side in a clamping device (17) at one end sections of wire (3) and, during the cutting of the filaments (4), at least a portion of the filaments (4) and / or the free end (20) of the wire is radially supported by a brush guide ( 10). 2. Method according to claim 1, characterized in that the supported part of the filaments (4) is supported by the brush guide (10) on the opposite side to the cutter (7) during the cutting of the free filaments (4). 3. Method according to claim 1 or 2, characterized in that the supported part of the filaments (4) is held by the brush guide (10) on both sides of the working plane of the cutter (7) during the cutting of the filaments (4) free. 4. Method according to any one of claims 1 to 3, characterized in that the brush (2) is rotated by a predefined or predefinable angle around the axis described by the direction of extension of the sections of wire metal (3) after cutting the filaments (4) on one side of the brush (2) and that the filaments (4) are then cut on another side of the brush (2). 5. Method according to any one of claims 1 to 4, characterized in that the brush (2) is pivoted about the axis described by the direction of extension of the wire sections (3) during cutting filaments (4) on one side of the brush (2). 6. Method according to any one of claims 1 to 5, characterized in that the filaments (4) are supported on a bearing surface (15) of the brush guide (10) during cutting. 7. Method according to any one of claims 1 to 6, characterized in that the radial distance of the bearing surface (15) from the wire sections (3) after the rotation of the brush (2) is adapted to the position of the ends of filaments (4) then being in front of the cutter (7). 8. Method according to any one of claims 1 to 7, characterized in that the brush guide (10) is replaced before cutting the filaments (4) in the rotated position of the brush (2). Method according to one of claims 1 to 8, characterized in that the wire sections (3) are clamped at one end in the clamping device (17) and gripped at the free end (20). and twisted before the filaments (4) are cut. Method according to one of Claims 1 to 9, characterized in that the cutter (7) and the brush (2) are additionally axially displaced against each other when cutting the filaments ( 4). Apparatus for making a brush, the manufactured brush (2) having two sections of wire (3) twisted together between which filaments (4) are inserted, comprising a clamping device (17) for holding the brush (2) and a cutting device (6) for cutting the filaments to a desired length, the cutting device (6) having a cutter (7) and the clamping device (17) and the cutting device (6) being designed so movable against each other, characterized in that the clamping device (17) has means for clamping the brush (2) on one side at one end of the wire sections (3) and in that a brush guide (10) which radially supports at least a portion of the filaments (4) and / or the free end (20) of the wire is provided. Device according to claim 11, characterized in that the brush guide (10) has a bearing surface (15) for the supported filaments (4) which is arranged on the opposite side of the brush (2). the strawberry (7). 13. Device according to claim 11 or 12, characterized in that the brush guide (10) has a support fork which grips the supported filaments (4) on both sides of the working plane of the cutter (7). 14. Device according to any one of claims 11 to 13, characterized in that the clamping device (17) is designed to rotate the brush by a predefined or predefinable angle around the axis described by the direction of extension of the wire sections (3). 15. Device according to any one of claims 11 to 14, characterized in that the clamping device (17) is designed to rotate the brush about the axis described by the direction of extension of the wire sections ( 3) during milling. 16. Device according to any one of claims 11 to 15, characterized in that a bearing surface on which at least a portion of the filaments (14) which are arranged outside the working area of the cutter (7). ) is supported during cutting is formed on the brush guide (10). 17. Device according to any one of claims 11 to 16, characterized in that the position of the bearing surface (15) is designed adjustably in the radial direction and adaptable to the position of the ends of filaments (4) se located in front of the cutter (7) and can be adapted. 18. Device according to any one of claims 11 to 17, characterized in that the brush guide (10) is interchangeable. 19. Device according to any one of claims 11 to 18, characterized in that an additional clamping device is provided for the free end (20) of the wire sections (3) of the brush (2), the additional clamping device for twisting the sections of wire (3) clamped in the two clamping devices (17) being designed to be pivotable about the axis described by the direction of extension of the wire sections (3) against the first clamping device (17), and can be pivoted. 20. Device according to any one of claims 11 to 19, characterized in that means for moving the cutter and the brush against each other in the axial direction are provided.