CN202923092U

CN202923092U - Screen printing machine

Info

Publication number: CN202923092U
Application number: CN 201220612511
Authority: CN
Inventors: 友松道范; 村上俊行; 村上稔; 前田亮
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2012-03-22
Filing date: 2012-11-19
Publication date: 2013-05-08
Anticipated expiration: 2022-11-19
Also published as: JP2013193402A

Abstract

The utility model aims to provide a screen printing machine, which can be used for performing shooting actions of a camera unit and the cleaning actions of a cleaning head on a mask at the same time. A camera unit (16) which is used for shooting a mask side mark (15m) arranged on a mask (15) and a substrate side mark (2m) arranged on a substrate (2) which is kept below the mask (15) moves in a first horizontal moving plane (S1) formed below the mask (15); and a cleaning head (18) which is used for cleaning the lower side of the mask (15) moves independently relative to the camera unit (16) in a second horizontal moving plane (S2) at a position which is below the mask (15) and is higher than the first horizontal moving surface (S1) where the camera unit (16) moves.

Description

Screen process press

Technical field

The utility model relates to by scraper plate is slided the screen process press of transfer printing cream and method for printing screen on substrate on the mask of substrate contacts.

Background technology

Constituting of screen process press, utilization be set in the mask of substrate contacts below move horizontally camera unit mobile in face, the mask side mark of being located at mask and the top substrate-side mark of being located at the substrate of the below that is maintained at mask are taken action, after making substrate and mask contact based on the position relationship of resulting mask side mark and substrate-side mark, scraper plate is slided on mask, the cream such as scolding tin that supply on mask are needed on substrate.And after cream was needed on substrate, the demoulding that substrate is left from mask made cleaning head move along direction in horizontal plane below mask after the demoulding, and the mask that carries out the following cream wiping that is attached to mask is removed cleans.

In such screen process press, in the past, camera unit and cleaning head were configured on the same level orthogonal coordinates workbench that is arranged at mask below and made both that one moves (for example, patent documentation 1) in the same level all-moving surfaces.

Patent documentation 1:(Japan) JP 2011-189668 communique

But, in above-mentioned existing formation, because camera unit and cleaning head can not be distinguished independent mobile, so can not carry out simultaneously originally action independent of each other, be camera unit to the shooting action of mark (mask side mark and substrate-side mark) and the cleaning head cleaning action to mask, camera unit has to carry out waiting for after the cleaning action of mask unit to mask finishes to the shooting action of mark.Therefore, it is elongated that each opens the required activity duration of substrate, has the problem of the productivity raising that hinders substrate.

The utility model content

Therefore, the purpose of this utility model is to provide the shooting action of carrying out camera unit and the cleaning head screen process press to the cleaning action of mask that can walk abreast simultaneously.

The screen process press of the utility model first aspect possesses: mask, itself and substrate contacts; Camera unit, its be set in described mask below first move horizontally in face and move, the top substrate-side mark of the mask side mark of being located at described mask and the described substrate of being located at the below that is maintained at described mask is taken action; Cleaning head, its by be set in described mask below and described first move horizontally second of face high position and move horizontally in face than what described camera unit moved, move independently with described camera unit, clean the following cleaning action of described mask; Scraper plate, it is after the position relationship based on the described mask side mark that is photographed by described camera unit and described substrate-side mark makes described substrate and described mask contacts, slide on described mask, the cream that will supply to thus on described mask is transferred on described substrate.

The screen process press of the utility model second aspect, on the basis of first aspect, parallel the carrying out of described cleaning action that the described shooting action that described camera unit carries out and described cleaning head carry out.

The screen process press of the utility model third aspect, first or the basis of second aspect on, described cleaning head possess prevent the cream of wiping below described mask in described cleaning action drop to described cleaning head below the cream incorporating section.

In the utility model, camera unit first moving horizontally in face and move below being set in mask, cleaning head be set in mask below and move horizontally second of face high position than first and move horizontally and move in face, camera unit and cleaning head move in moving horizontally in face of differing from one another, therefore, can walk abreast simultaneously the shooting action of carrying out camera unit and the cleaning action of cleaning head can shorten the required activity duration of each substrate, can improve the productivity of substrate.

Description of drawings

Fig. 1 is the top view of the screen process press of the utility model one embodiment;

Fig. 2 is the front elevation of the screen process press of the utility model one embodiment;

Fig. 3 is the side view of the screen process press of the utility model one embodiment;

Fig. 4 means the block diagram of control system of the screen process press of the utility model one embodiment;

Fig. 5 means the flow chart of the order of the serigraphy operation that the screen process press of the utility model one embodiment is carried out;

Fig. 6 (a) and (b) are figure of the execution sequence of the serigraphy operation carried out of the screen process press of explanation the utility model one embodiment;

Fig. 7 means that cleaning head that the screen process press that utilizes the utility model one embodiment possesses carries out the figure of state of the cleaning of mask;

Fig. 8 (a) and (b) are figure of the execution sequence of the serigraphy operation carried out of the screen process press of explanation the utility model one embodiment.

Description of symbols

1: screen process press

2: substrate

2m: substrate-side mark

15: mask

15m: mask side mark

16: camera unit

17b: scraper plate

18: cleaning head

30: framework (cream incorporating section)

S1: first moves horizontally face

S2: second moves horizontally face

Pt: cream

The specific embodiment

Below, illustrate referring to the drawings embodiment of the present utility model.Fig. 1, Fig. 2 and screen process press 1 shown in Figure 3 are the device of the cream Pt such as serigraphy scolding tin on the electrode part 2a of substrate 2, move into conveyer 11 except possess substrate on base station 10, take out of outside conveyer 14 by substrate holding unit 13 and substrate that substrate holding unit travel mechanism 12 moves, also has the mask 15 that is held in the top of substrate holding unit 13 with flat-hand position, the mobile camera unit 16 that arranges freely below mask 15, upper area at mask 15 moves the cleaning head 18 of the squeegee unit 17 of setting freely and mobile setting freely below mask 15 and consists of.

Substrate is moved into conveyer 11 and is moved into the substrate 2 that drops into from the outside of screen process press 1 and it is handed off to substrate holding unit 13.Substrate is taken out of conveyer 14 will take out of from the substrate 2 that substrate holding unit 13 receives the outside of screen process press 1.That is, substrate 2 is moved into conveyer 11, substrate holding unit 13, substrate with substrate and is taken out of the order of conveyer 14 and carry out conveyance, take the moving direction of this substrate 2 as X-direction (left and right directions of observing from operator OP).In addition, take with the horizontal plane of this X-direction quadrature in direction as Y direction (fore-and-aft direction of observing from operator OP), take above-below direction as Z-direction.

In Fig. 1, mask 15 is made of the plate-shaped member of rectangle, the mask frame 15w supporting that its outer cause is rectangular box-like.Central portion at mask 15 is provided with a plurality of peristome 15hs corresponding with the electrode part 2a of substrate 2.

In Fig. 1, the pair of horns position on substrate 2 is provided with two substrate-side mark 2m, and is on mask 15, corresponding with these two substrate-side mark 2rn and be provided with two mask side mark 15m.When making two substrate-side mark 2m and two mask side mark 15m make substrate 2 increase under relative state up and down and substrate 2 is contacted with mask 15, the electrode part 2a of substrate 2 and the peristome 15h that is located at mask 15 become consistent state.

In Fig. 2 and Fig. 3, substrate holding unit 13 has: the matrix part 13a that arranges freely with respect to base station 10 liftings, be installed on matrix part 13a and along the substrate transferring conveyer 13b(of X-direction conveyance substrate 2 also with reference to Fig. 1), the substrate 2 that makes the substrate holding position that utilizes the 13b conveyance of substrate transferring conveyer and be positioned to stipulate by lower support parts 13c from below a pair of hold assembly 13e(that keeps from the Y direction clamping of the substrate 2 that carries out the substrate elevating cylinder 13d of lifting under the state of supporting and will utilize substrate elevating cylinder 13d jack-up also with reference to Fig. 1) and consist of.

In Fig. 4, the hold assembly driving mechanism 13A that is made of not shown actuator etc. that substrate is moved into the action control of the substrate transferring conveyer 13b of conveyer 11, substrate holding unit 13, action control that substrate is taken out of conveyer 14, substrate elevating cylinder 13d and driven a pair of hold assembly 13e is undertaken by the control device 20 that screen process press 1 possesses the control of the holding action of substrate 2.

Substrate holding unit travel mechanism 12 is made of the XYZ manipulator, carry out action control by control device 20, make substrate holding unit 13 move (also comprising rotation) in horizontal plane, make simultaneously substrate holding unit 13 at above-below direction (Z-direction) mobile (Fig. 4).

In Fig. 1 and Fig. 3, camera unit 16 possesses to make to take the visual field towards the below of below shooting camera 16a and make to be taken the visual field towards the top of top shooting camera 16b and consists of, by camera unit 16M(Fig. 2 of travel mechanism and Fig. 3) below direction in horizontal plane of mask 15 is moved.

at Fig. 1, in Fig. 2 and Fig. 3, the 16M of camera unit travel mechanism is installed on respectively two of the left side of extending from four angles tops of base station 10 four plumb posts 21 that arrange and right side two and two below Y-axis ball-screws 22 extending along Y direction by the rear and front end, the two ends, left and right screw up in these two below Y-axis ball-screws 22 and the below travelling table 23 that extends along X-direction, below the front face side of travelling table 23 extend to arrange along X-direction below X-axis ball-screw 24, screw up in the camera mounting blocks 25 of this below X-axis ball-screw 24, two of driven in synchronism below Y-axis ball-screws 22 make two below Y-axis ball screw drive motor 26 that below travelling table 23 moves along Y direction and drive below X-axis ball-screw 24 camera mounting blocks 25 is consisted of along the below X-axis ball screw drive motor 27 that X-direction moves, camera unit 16 is installed in the front of below travelling table 23.Therefore, camera unit 16 is by the spinning movement of two below Y-axis ball screw drive motor 26 and below X-axis ball screw drive motor 27, first moves horizontally face S1(Fig. 2 and Fig. 3 integratedly below mask 15 with below travelling table 23) in movement.

In Fig. 4, the rotation that consists of two of the above-mentioned camera unit 16M of travel mechanism below Y-axis ball screw drive motor 26 and below X-axis ball screw drive motor 27 is controlled and is undertaken by control device 20.In addition, the shooting action of camera 16a is taken in the below and shooting action that camera 16b is taken in the top is controlled by control device 20, takes view data that the shooting action of camera 16a obtains and move by the shooting that camera 16b is taken in the top view data that obtains by the below to be sent to control device 20.

In Fig. 1, Fig. 2 and Fig. 3, squeegee unit 17 have by the action of the squeegee unit 17M of travel mechanism that consisted of by the horizontal quadrature coordinate setting table above mask 15 along Y direction freely mobile matrix part 17a below possess consisting of of two scraper plate 17b being oppositely arranged on Y direction, each scraper plate 17b utilizes two pneumatic cylinder 17c that are installed on matrix part 17a to carry out independently respectively lifting below matrix part 17a.The elevating control of the scraper plate 17b that the action of the action control of the 17M of squeegee unit travel mechanism and each pneumatic cylinder 17c is carried out carries out (Fig. 4) by control device 20.

In Fig. 3, cleaning head 18 have in framework 30 rotate freely around X-axis two

rotary body

31a, 31b(arranging and extract the rotary body 31a of sides out and batch the rotary body 31b of side), hang on the paper parts 32 between these two

rotary body

31a, 31b and consist of to the mouth 33 that extends along X-direction of these paper parts 32 top jack-up, by driving and make paper parts 32 to advance along Y direction to same direction two

rotary body

31a, 31b, can upgrade the top cleaning position that paper parts 32 are positioned at mouth 33.The upper end of mouth 33 be provided with via paper parts 32 from below attraction mouth below butt mask 15.

Cleaning head 18 cleaning head 18M(Fig. 2 of travel mechanism and Fig. 3 by being consisted of by horizontal quadrature coordinate manipulator) freely move along Y direction.the 18M of cleaning head travel mechanism is installed on respectively in above-mentioned four plumb posts 21 by the rear and front end two top Y-axis ball-screws 41 that two of the left side and right side two are upper and extend along Y direction, the two ends, left and right screw up on these two top Y-axis ball-screws 41 and extend and be equipped with the top travelling table 42 of the framework 30 of cleaning head 18 along X-direction, two of driven in synchronism top Y-axis ball-screws 41 and top travelling table 42 is consisted of along two top Y-axis ball screw drive motor 43 that Y direction moves.

At this, two tops Y-axis ball-screw 41 and top travelling tables 42 are positioned at the position than two below Y-axis ball-screws 22 that consist of the camera unit 16M of travel mechanism and below X-axis ball-screw 24 top sides.Therefore, the action of cleaning head 18 by two top Y-axis ball screw drive motor 43 and top travelling table 42 second move horizontally face S2(Fig. 2 and Fig. 3 integratedly below mask 15) in movement.What this cleaning head 18 moved second moves horizontally face S2 and is positioned at and first moves horizontally the higher position of face S1 according to what camera unit 16 moved, and therefore, cleaning head 18 is moving according to low the moving horizontally in face of camera unit 16.

In Fig. 4, the rotation control that consists of two top Y-axis ball screw drive motor 43 of the above-mentioned cleaning head 18M of travel mechanism is undertaken by control device 20.In addition, paper parts 32 are advanced and the action of upgrading the cleaning position of the top paper parts 32 that hang on mouth 33 carries out by control device 20 the rotary body drive motor 31A action that drives above-mentioned two rotary body 31a, 31b.In addition, carry out via the vacuum attraction action of the attraction mouth of mouth 33 action control by the attraction 18A of mechanism that undertaken by control device 20 being consisted of by not shown actuator etc.

Then, the execution sequence of the serigraphy operation of the key diagram explanation screen process press 1 of the flow chart of use Fig. 5 and Fig. 6～Fig. 8.

Control device 20 is when carrying out the serigraphy operation, the substrate 2 that at first will drop into from the outside of screen process press 1 be moved into conveyer 11 by substrate and moves into and join to substrate transferring conveyer 13b, and (substrate is moved into operation to be located job position in afore mentioned rules.Step ST1 shown in Figure 5).And, the clamping (the arrow mark B shown in Fig. 6 (a)) of the substrate 2 that carries out the jack-up (the arrow mark A shown in Fig. 6 (a)) of the substrate 2 that carries out based on substrate elevating cylinder 13d and carry out based on hold assembly 13e keeps substrate 2(substrate to move into the maintenance operation.Step ST2 shown in Figure 5.Fig. 6 (a)).

After control device 20 keeps substrate 2 as mentioned above, consist of the action control of two of the camera unit 16M of travel mechanism below Y-axis ball screw drive motor 26 and below X-axis ball screw drive motor 27, camera unit 16 is moved horizontally in face S1 first move.And, take above making camera 16b be positioned at the mask side mark 15m that is located at mask 15 under after, make the top take camera 16b and carry out the shooting of mask side mark 15m, hold position (the mask side mark shooting operation of mask 15 according to this view data.Step ST3 shown in Figure 5), control device 20 is after the shooting that finishes 16 couples of mask side mark 15m of camera unit, carry out equally the action control of two below Y-axis ball screw drive motor 26 and below X-axis ball screw drive motor 27, camera unit 16 is moved horizontally in face S1 first to be moved, take below making camera 16a be positioned at the substrate-side mark 2m that is located at substrate 2 directly over after, make the below take camera 16a to the shooting of substrate-side mark 2m, hold position (the substrate-side mark shooting operation of substrate 2 according to this view data.Step ST4 shown in Figure 5).

At this, the order of above-mentioned steps ST3 and step ST4 also can be put upside down, but the shooting of mask side mark 15m is only carried out when at first mask 15 being set.

Like this, in the present embodiment, camera unit 16 be located at mask 15 below first move horizontally in face S1 and move, be located at the mask side mark 15m of mask 15 and be located at the shooting action of top substrate-side mark 2m of the substrate 2 of the below that is maintained at mask 15.

The shooting of mask side mark 15m in control device 20 and above-mentioned steps ST3 and the shooting of the substrate-side mark 2m in step ST4 are parallel, carry out the following cleaning of the mask 15 that cleaning head 18 carries out and (clean and carry out operation.Step ST5 shown in Figure 5).That is, the shooting action (the shooting operation of step ST3 and step ST4) carried out of camera unit 16 and cleaning head 18 cleaning action (step ST5) of carrying out walks abreast simultaneously and carries out.

The cleaning of the mask 15 of step ST5 is carried out in the following way, namely, control device 20 consists of the action control of two top Y-axis ball screw drive motor 43 of the cleaning head 18M of travel mechanism, after the cleaning position that makes paper parts 32 contacts below mask 15, attract the action control of the 18A of mechanism, make mouth 33 carry out vacuum attraction, cleaning head 18 is moved horizontally in face S2 second move (the arrow mark C shown in Fig. 7) along Y direction.Thus, be attached to the residue of the following cream Pt(cream Pt of mask 15 by 32 wipings of paper parts), clean below mask 15.

In addition, the cleaning of the mask 15 that this cleaning head 18 carries out also can be carried out the serigraphy operation to every substrate, but also can be undertaken by the quantity of predetermined regulation.

Like this, in the present embodiment, cleaning head 18 by be set in mask 15 below and first move horizontally second of face S1 high position and move horizontally in face S2 and move independently with camera unit 16 according to what camera unit 16 moved, clean the following cleaning action of mask 15.

During cleaning below carrying out this mask 15, the cream Pt that wipes below mask 15 can not be attached on paper parts 32, fall after perhaps being attached on paper parts 32, but because this cream Pt that falls accumulates in framework 30, thereby can prevent that it from dropping to the below of cleaning head 18.That is, in the present embodiment, the framework of cleaning head 18 30 as prevent the cream Pt that wipes below mask 15 drop to cleaning head 18 the below the cream incorporating section and work.

Control device 20 carries out the shooting of 16 couples of substrate-side mark 2m of camera unit and the shooting of mask side mark 15m at step ST3 and step ST4, in addition, as required after step ST5 has carried out the cleaning of mask 15, substrate holding unit 13 direction in horizontal plane is moved, with substrate-side mark 2m and mask side mark 15m up and down the mode of relative (namely based on the mask side mark 15m that is photographed by camera unit 16 and substrate-side mark 2m position relationship) carry out substrate 2 with respect to contraposition (the contraposition operation of direction in the horizontal plane of mask 15.Step ST6 shown in Figure 5).

Control device 20 is after the contraposition end of substrate 2 with respect to mask 15, carry out the action control of substrate holding unit travel mechanism 12, make substrate holding unit 13 with respect to base station 10 risings (the arrow mark D1 shown in Fig. 6 (b)), the following of top and mask 15 of the substrate 2 that is kept by a pair of hold assembly 13e contacted, make thus substrate 2 contact mask 15(contact operations.Step ST7 shown in Figure 5.Fig. 6 (b)).Thus, the peristome 15h of the electrode part 2a on substrate 2 and mask 15 becomes consistent state.

Control device 20 carries out the blade coating of scraper plate 17b after making substrate 2 and mask 15 contacts, will supply in advance cream Pt on mask 15 and be transferred to the electrode part 2a(transfer printing process of substrate 2.Step ST8 shown in Figure 5).This blade coating is following carrying out particularly, make action (the arrow mark E1 shown in Fig. 8 (a)) under the direction in two scraper plate 17b that squeegee unit 17 possesses, make matrix part 17a along continuous straight runs move (the arrow flag F shown in Fig. 8 (a)) under the state of keeping with butt above mask 15.Thus, scraper plate 17b slides on mask 15, and the cream Pt on mask 15 is scraped to together by scraper plate 17b, pushes in the peristome 15h of mask 15, is needed on the electrode part 2a of each substrate 2.

Namely, in the present embodiment, scraper plate 17b is after the position relationship based on the mask side mark 15m that is photographed by camera unit 16 and substrate-side mark 2m makes mask 15 and substrate 2 contacts, slide on mask 15, will supply to thus cream Pt on mask 15 and push in the peristome 15h of mask 15 and be transferred on the electrode part 2a of substrate 2.

Control device 20 in transfer printing on the electrode part 2a of substrate 2 after cream Pt, make the upwards action rear (the arrow mark E2 shown in Fig. 8 (b)) of scraper plate 17b that is connected to mask 15, make 12 actions of substrate holding unit travel mechanism, substrate holding unit 13 is descended, make thus substrate 2 leave the arrow mark D2 shown in mask 15(Fig. 8 (b)), carry out the demoulding (stripping process.Step ST9 shown in Figure 5.Fig. 8 (b)).Thus, cream Pt residues on the electrode part 2a of substrate 2, printing paste Pt on substrate 2.

In addition, at this, substrate holding unit travel mechanism 12 is as after finishing to the transfer printing of substrate 2 at cream Pt that scraper plate 17b carries out, makes the mould emptier that substrate 2 leaves from mask 15 and works.

Control device 20 carries out the action control of substrate holding unit 13 after carrying out the demoulding, the maintenance of removing substrate 2 (keeps removing operation.Step ST10 shown in Figure 5).The releasing of the maintenance of this substrate 2 is particularly carried out in the following way, namely, control device 20 is at the action control that carries out hold assembly driving mechanism 13A and after opening hold assembly 13e, make substrate elevating cylinder 13d action and substrate 2 is descended, make the two ends of substrate 2 drop to a pair of substrate transferring conveyer 13b upper (with reference to Fig. 3).

Control device 20 is after the maintenance of removing substrate 2, make 12 actions of substrate holding unit travel mechanism, substrate holding unit 13 is moved in horizontal plane, after having adjusted the direction of substrate transferring conveyer 13b, make substrate transferring conveyer 13b and substrate take out of conveyer 14 action, substrate 2 is taken out of the outside of screen process press 1, and (substrate is taken out of operation.Step ST11 shown in Figure 5).Thus, finish a series of serigraphy operation.

In addition, carried out under the state of the demoulding in above-mentioned step ST9, become the state that is attached with the residue of cream Pt below mask 15, but the cleaning (step ST5) of the residue of this cream Pt by the parallel 18 pairs of masks 15 of cleaning head that carry out of shooting (step ST3 and step ST4) by the mask side mark 15m that carries out with camera unit 16 and substrate-side mark 2m in about the serigraphy operation of next substrate 2 is removed.

like this, the method for printing screen of the screen process press 1 of present embodiment comprises: utilize be set in the mask 15 that contact with substrate 2 below first move horizontally camera unit 16 mobile in face S1 be located at the mask side mark 15m of mask 15 and be located at remain on mask 15 below substrate 2 above the shooting of the substrate-side mark 2m shooting operation (step ST3 and step ST4) of moving, utilization be set in mask 15 below and first move horizontally second of face S1 high position and move horizontally in face S2 and camera unit 16 mobile cleaning head 18 independently according to what camera unit 16 moved, clean the matting (step ST5) of the following cleaning action of mask 15, and make substrate 2 contact the transfer printing process (step ST8) that the rear cream Pt that will supply to by scraper plate 17b is slided on mask 15 is needed on substrate 2 with mask 15 on mask 15 based on the position relationship of the mask side mark 15m that photographs in the shooting operation and substrate-side mark 2m.

as described above, at the screen process press 1(of present embodiment method for printing screen) in, camera unit 16 be set in mask 15 below first move horizontally in face S1 and move, cleaning head 18 be set in mask 15 below and move horizontally second of face S1 high position than first and move horizontally and move in face S2, camera unit 16 and cleaning head 18 move in moving horizontally in face of differing from one another, therefore, the shooting action of carrying out camera unit 16 and the cleaning action of cleaning head 18 simultaneously can walk abreast, can shorten the required activity duration of each substrate 2, can improve the productivity of substrate 2.

Utilizability on industry

A kind of screen process press and method for printing screen of cleaning action of mask of can walk abreast simultaneously the shooting action of carrying out camera unit and cleaning head is provided.

Claims

1. screen process press is characterized in that possessing:

Mask, itself and substrate contacts;

Camera unit, its be set in described mask below first move horizontally in face and move, the top substrate-side mark of the mask side mark of being located at described mask and the described substrate of being located at the below that is maintained at described mask is taken action;

Cleaning head, its by be set in described mask below and described first move horizontally second of face high position and move horizontally in face than what described camera unit moved, move independently with described camera unit, clean the following cleaning action of described mask;

Scraper plate, it is after the position relationship based on the described mask side mark that is photographed by described camera unit and described substrate-side mark makes described substrate and described mask contacts, slide on described mask, the cream that will supply to thus on described mask is transferred on described substrate.

2. screen process press as claimed in claim 1, is characterized in that,

Parallel the carrying out of described cleaning action that the described shooting action that described camera unit carries out and described cleaning head carry out.

3. screen process press as claimed in claim 1 or 2, is characterized in that,

Described cleaning head possess prevent the cream of wiping below described mask in described cleaning action drop to described cleaning head below the cream incorporating section.