• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A control device for round brushes, in particular for twisted brushes or round brush blanks with a carrier part (3) and a bristle pad (4), has a rotating support (7) for round brushes or brushes. Round brush blanks (2) as well as a control camera (13) for recording images of round brushes or round brush blanks (2) in several rotational positions. The monitoring camera (13) is connected to an evaluation and control device which has an electronic memory for at least one reference image and a comparator for comparing the actual images with the one or more reference images.
    公开号:BE1019017A3
    申请号:E2007/0039
    申请日:2007-01-31
    公开日:2012-01-10
    发明作者:Frank Stiefvater；Alfons Zeiher；Peter Steinebrunner
    申请人:Zahoransky Ag；
    IPC主号:
    专利说明:

    The invention relates to a control device for round brushes, in particular for twisted brushes or blanks of round brushes with a carrier part and a hair lining.
    In the manufacture of such brushes, these brushes may be interdental brushes, mascara brushes but also other round brushes such as totally round hairbrushes, various defects may occur, defects that are at the origin of a defective final product. The number of filaments of the pile lining may vary and individual hairs may protrude from the generally cylindrical enveloping surface. In addition, the carrier portion can be folded in the case of twisted brushes, so that it does not protrude into the mold cavity in the intended position during an injection molding process for a handle.
    The task of the present invention is to provide a control device of the type mentioned at the beginning which quickly and reliably detects defects occurring on round brushes.
    To solve this problem, it is proposed that the control device has a rotatable holder for round brushes or round brush blanks as well as a control camera for recording images of round brushes or round brush blanks in several positions. of rotation and that the control camera is connected to an evaluation and control device which presents an electronic memory for at least one reference image and a comparator for comparing the actual images with the reference image or images.
    With this control device, round brushes or round brush blanks can be completely checked for production defects during a revolution. All the defects are detected at the same time, namely the density of the hair zone, a check being made to find out if enough filaments are present, the outer contour of the pile lining, a check being made to know if filaments Individuals protrude from the outer contour and if filaments have been inserted next to the intended bristle trim. In addition, it is detected at the same time if the round brushes or round brush blanks are bent, thus deviate from the rectilinear extension position. A complete quality control is thus carried out.
    The control device can be integrated directly into the production line, the control process taking place almost during the cycle and taking only a short time despite the complete check of the defects. In particular, the check of defects takes place so fast that it does not influence, therefore does not lengthen, a predefined cycle time.
    It is appropriate in this case that the control device is inserted in the transport path between a twisting machine for making the round brush blanks, the carrying part being manufactured and the brush insert inserted in the twist, and a machine injection molding to mold a handle by injection. During this finishing phase, virtually all defects that occur can be detected and, in addition, scrap costs can be kept low by setting aside defective round brush blanks before injection molding sleeves. .
    Suitably, the holder has a housing for holding or grasping round brushes or round brush blanks at their carrier portion. This housing can be configured in the manner of a collet and in particular grasp the round brush blanks at the wire twisted carrier portion.
    As rotation drive for the support, it is preferably provided a servomotor which is in control communication with the evaluation and control device. Suitably, there are provided in this case several reference images respectively associated with a rotational position, for a rotation of the support. Thanks to the servomotor, the specimen can be successively brought into several different rotational positions and an image comparison with a reference image in memory can be performed in each of these rotational positions by means of the evaluation and control device.
    According to a configuration of the invention, there is provided a feed device for round brushes or round brush blanks to the rotary support, which device has a transport channel in which gas circulates and preferably a tube Venturi to produce the flow.
    In this way round brushes or round brush blanks can be fed in a simple, fast and precise manner to the control device.
    Advantageously, the outlet end of the transport channel is aligned in the axial extension of the axis of rotation of the rotary support or the housing for holding or grasping round brushes or round brush blanks.
    The round brush blanks are fed to the control device in the transport channel with their carrier part at the head so that the carrier parts are inserted directly into the housing of the rotating support during the transfer.
    The transport channel may be configured as a flexible hose with an inner diameter that corresponds approximately to the diameter of the bristle trim of the brush blank.
    Subsequent transport of the round brushes or controlled round brush blanks may be effected by a handling device or a downstream transport channel, in which gas flows and which includes a Venturi tube to produce the flow comparable to the supply of brushes.
    An advantageous development of the invention provides that the control device has two supports for round brushes or round brush blanks which can be associated alternately with a supply station for bringing round brushes and a control station with the control camera.
    While the check of round brushes or round brush blanks takes place in the checkpoint, a next specimen may be brought at the same time to the feeding station and placed on the support or clamped so that in total it takes less time for control.
    Additional configurations of the invention are set forth in the other dependent claims. The invention with its essential details will be further explained in more detail below on the basis of the drawings.
    It is shown somewhat diagrammatically in FIG. 1 is a side view of a round brush blank with four different finishing defects, and FIG. 2 a control device with a supply station and a control station with a control camera.
    A control device 1 shown in FIG. 2 serves for the quality control of round brushes whose round brush blanks 2 are shown in FIGS. 1 and 2. The round brush blanks consist of a carrier portion 3 wound in wire and a pile lining 4 which during the winding of the carrier portion 3 are inserted between the son. A twist machine not shown here, in which filaments forming the pile liner 4 are inserted between a U-shaped bent wire loop and are then milled circularly, to fabricate the blanks 2. These brush blanks round 2 are then brought to the control device 1 via a transport channel 5, the output end 6 is shown in FIG. 2.
    In the embodiment according to FIG. 2, the control device 1 has two supports 7 for the round brush blanks 2 which can be associated alternately with a supply station 8 and a control station 9. The supports 7 themselves are rotary (arrow Pf 1) and respectively have a housing 10 for gripping the brush blanks 2 at their carrier portion 3.
    The two supports 7 are arranged on a pivotable arm pivotable each time by 180 degrees, which can pivot about an axis 12 (arrow Pf2).
    The round brush blanks 2 fed to the supply station 8 via the transport channel 5 arrive directly into the housing 10 of the support 7 located in the axial extension and are brought to the control station 9 by rotating the pivoting arm 11. A control camera 13, which is oriented towards the part of the round brush blank 2 protruding from the support, is associated with this control station 9. It is provided at the rear of the blank 2 to control, opposite the camera 13, a plate 14 in particular with a monochrome bottom side 15 oriented towards the object to be photographed and towards the control camera 15.
    The pivoting supports 7 have on the underside drive sprockets 16 which can be coupled in the control station to a rotational drive 17 which has a toothed wheel 18. In this way, the specimens (brush blanks 2) located in the control station 9 can be brought into several rotational positions in which it can each time be compared with one or more reference images with the aid of the control camera 13.
    In the case of round brushes of identical peripheral shape, a reference image is sufficient, since the brushes give an identical image in each rotational position when there is no defect.
    Brushes that are configured in a non-identical manner with respect to the peripheral pace are suitably compared to a plurality of reference images stored in memory. In this case, each reference image is associated with a rotational position therefrom of the specimen of different peripheral appearance. To bring the brush blanks up to the supports 7 in the same position with respect to their rotational position, the conveying channel 5 may have at its outlet end 6 an internal cross-sectional shape corresponding to the cross section of the brush in the area of the pile lining, so that the incoming brushes are all inserted in the same rotational position in the housing 10 of the supports 7.
    On the other hand, there is the possibility that in the case of such brushes of different peripheral appearance, the actual image taken in a rotational position is compared with a plurality of reference images taken during a rotation of the brush. An exact association of the rotational position of the specimen and the reference image is thus superfluous. If several different reference images are in particular in memory and if the actual images are compared each time to all the reference images, it is possible to deduce if there are defects on the specimen. If one of the reference images corresponds to the actual image, there is no defect in this brush section.
    In fig. 1, any defects on the round brush blank 2 are indicated by the arrows a to d. The arrow has indicated a hair 19 protruding from the periphery, the arrow b a hair 20 deviating obliquely at the end, the arrow c a hair zone section 21 with a too small number of bristles, therefore with a hole , and the arrow d finally bristles 22 which are inserted into the carrier portion 3 outside the hair lining 4 provided. All of these faults can be detected during a control process.
    It should also be mentioned that for the rotary drive 17, it is preferably provided a servomotor which is in control communication with an evaluation and control device not shown here. The control camera 13 is also in communication with this evaluation and control device so that an association can be made between the rotation position of the specimen and the appropriate reference image.
    After the check, the round brush blanks 2 can be removed from the control station 9 and fed to an injection molding machine for brush sleeve injection molding. This can also be done, if necessary, pneumatically via a transport channel.
    The waste profile, therefore the frequency and the number of waste brushes, can also be recorded by the control device. In the case of defects occurring one after the other, for example in the case of three successive waste brushes, or when in a given number of pieces, more than a predetermined number of waste brushes occur, the set of the machine can for example be stopped.
    In addition to the defects shown by way of example in FIG. 1, it is also possible to check with the control device 1 if the carrier part 3 is folded. In this case, positional deviations of the section of the round brush blank 2 having the pile lining 4 would be in different rotational positions which will be detected by the camera system.
    For long brushes, there may be provided near the support 7 a guide for the end of the carrier portion 3 opposite the side of the handle, protruding from the bristle. In this case, a check of the rectilinear extension position of the round brush blank 2 is superfluous.
    权利要求:
    Claims (10)
    [1]
    1. Control device for round brushes, in particular for twisted brushes or round brush blanks with a carrier part (3) and a pile lining (4), characterized in that it has a rotating support (7) ) for round brushes or round brush blanks (2) and a control camera (13) for recording images of round brushes or round brush blanks (2) in a plurality of rotational positions and that the control camera (13) is connected to an evaluation and control device which has an electronic memory for at least one reference image and a comparator for comparing the actual images with the reference image (s).
    [2]
    2. Control device according to claim 1, characterized in that the support (7) has a housing (10) for holding or grasping round brushes or round brush blanks at their carrier portion (3).
    [3]
    Test device according to Claim 1 or 2, characterized in that a servomotor which is in control communication with the evaluation and control device is provided as a rotary drive (17) for the support (7). .
    [4]
    4. Control device according to one of claims 1 to 3, characterized in that for a rotation of the support (7), there is provided a plurality of reference images respectively associated with a rotational position.
    [5]
    5. Control device according to one of claims 1 to 4, characterized in that there is provided a plate (14) in particular with a bottom side (15) monochrome oriented towards the object to be photographed and to the camera control (13).
    [6]
    6. Control device according to one of claims 1 to 5, characterized in that it has two supports (7) for round brushes or round brush blanks (2) which can be associated alternately with a station of feed (8) for feeding round brushes or round brush blanks (2) and at a control station with the control camera (13).
    [7]
    7. Control device according to claim 6, characterized in that the two supports (7) are arranged on a pivoting arm (11) pivotable each time by 180 °.
    [8]
    8. Control device according to claim 6 or 7, characterized in that the rotary drive is associated with the control station (9) and can be coupled there to the rotary support (7).
    [9]
    9. Control device according to one of claims 1 to 8, characterized in that a feed device is provided for round brushes or round brush blanks (2) to the rotary support (7), which device has a transport channel (5) in which gas flows and preferably a Venturi tube to produce the flow.
    [10]
    10. Control device according to claim 9, characterized in that the output end (6) of the transport channel (5) is aligned in the axial extension of the axis of rotation of the support (7) rotating or the housing (10) for holding or grasping round brushes or round brush blanks (2) and having, if appropriate, an inner cross-section adapted to the brushes of different peripheral shape for rotational positioning.
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2487629A|1945-10-26|1949-11-08|Sheffield Corp|Gauging device for piston rings and other objects|
    EP0341849A2|1988-05-09|1989-11-15|Glass Technology Development Corporation|Optical profile measuring apparatus|
    US20050060822A1|2003-09-19|2005-03-24|Chenvainu Alexander T.|Toothbrushes|
    US7705744B2|2007-05-24|2010-04-27|Cutsforth Products, Inc.|Monitoring systems and methods for monitoring the condition of one or more components of an electrical device|
    DE102008036206B4|2008-08-02|2019-07-11|Zahoransky Ag|Brush making machine for round brushes|
    EP3304658B1|2015-06-01|2021-07-28|Cutsforth Inc.|Brush wear and vibration monitoring|
    WO2017123521A1|2016-01-11|2017-07-20|Cutsforth, Inc.|Monitoring system for grounding apparatus|
    CN113243063A|2018-10-04|2021-08-10|科茨福斯有限公司|System and method for monitoring the condition of one or more components of an electric machine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE200620003418|DE202006003418U1|2006-03-04|2006-03-04|Control device for turning round brushes or brush parts includes camera to take pictures of brush in different positions and memory to compare them to reference pictures|
    DE202006003418|2006-03-04|
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