CN111703094A

CN111703094A - Surface scratch repairing device for plastic part

Info

Publication number: CN111703094A
Application number: CN202010615801.4A
Authority: CN
Inventors: 吴海忠
Original assignee: Hangzhou Rongqi Technology Co ltd
Current assignee: Hangzhou Rongqi Technology Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-09-25

Abstract

The invention discloses a plastic part surface scratch repair device, which comprises a repair agent storage box, wherein an injection repair device is arranged on the repair agent storage box and used for storing and injecting repair agent to the plastic surface, a lifting power device positioned at the upper right side of the injection repair device is arranged on the repair agent storage box and used for providing lifting motion required for injecting the repair agent and recovering the redundant repair agent, a repair liquid recovery device is arranged at the lower side of the repair agent storage box and used for detecting the injection pressure of the repair agent so as to ensure that the repair agent can be fully conveyed into a plastic scratch, the repair liquid recovery device can recover the redundant repair agent, and a polishing paint spraying device is arranged on the repair agent storage box. The repair quality is easy to guarantee.

Description

Surface scratch repairing device for plastic part

Technical Field

The invention relates to the technical field of plastic surface treatment, in particular to a plastic part surface scratch repairing device.

Background

The plastic is a high molecular compound which is prepared by polymerizing monomers through addition polymerization or polycondensation reaction, has moderate deformation resistance, is arranged between fiber and rubber, and consists of synthetic resin, filler, plasticizer, stabilizer, lubricant, pigment and other additives.

Disclosure of Invention

The technical problem is as follows: at present, the surface of a plastic part with deep scratches needs to be repaired by manually filling a repairing agent, so that the using amount of the repairing agent is difficult to control, and the repairing quality is difficult to ensure.

In order to solve the problems, the embodiment designs a plastic part surface scratch repair device, which comprises a repair agent storage box, wherein the repair agent storage box is provided with a liquid injection repair device, the liquid injection repair device is used for storing and injecting repair agent to the plastic surface, the liquid injection repair device comprises a repair agent storage cavity which is arranged in the repair agent storage box and has an upward opening, the lower side end surface of the repair agent storage cavity is fixedly connected with a supporting rod, the supporting rod is fixedly connected with a sealing box which is arranged at the lower side of the repair agent storage box, the sealing box is internally provided with a downward opening, the repair agent storage cavity is internally provided with a push plate in a sliding connection manner, the repair agent storage box is provided with a lifting power device which is arranged at the upper right side of the liquid injection repair device, the lifting power device provides lifting motion required by injecting repair agent and recovering redundant repair agent, the repair agent storage box is characterized in that a repair liquid recovery device is arranged on the lower side of the repair agent storage box and used for detecting injection pressure of a repair agent, so that the repair agent can be fully conveyed into a plastic scratch, redundant repair agent can be recovered by the repair liquid recovery device, the repair liquid recovery device comprises an extrusion plate which is connected to the inner wall in a sliding mode, a check valve is connected to the upper side end face of the extrusion plate in a communicating mode, a liquid conveying pipe is connected between the check valve and the repair agent storage cavity in a communicating mode, a through hole which is communicated with the check valve and has a downward opening is formed in the extrusion plate, an auxiliary air cylinder is fixedly connected to the upper side end face of the extrusion plate, an auxiliary air cavity with the rightward opening is arranged in the auxiliary air cylinder, an auxiliary piston is connected to the auxiliary air cavity in a sliding mode, and an auxiliary piston rod which extends downwards, fixedly connected with is located on the vice piston rod lifter plate of stripper plate downside, fixedly connected with auxiliary stay board on the terminal surface of seal box upside, be equipped with polishing paint spraying apparatus on the restoration agent bin, polishing paint spraying apparatus is used for polishing the working of plastics surface and removes the mar and the restoration of spraying paint.

Preferably, fixedly connected with upwards extends's lifter on the push pedal upside terminal surface, be equipped with the spacing hole of lining up about in the lifter, just spacing hole is located restorative agent bin upside, fixedly connected with fixed plate on the restoration agent bin right-hand member face, fixedly connected with supporting shoe on the fixed plate front end face, fixedly connected with is located on the fixed plate upside terminal surface the handle on supporting shoe right side, it has the injection tube of downwardly extending to the seal box to communicate with each other to be connected on the restoration agent storage chamber downside terminal surface, the injection tube runs through the stripper plate, just the injection tube with the stripper plate is dynamic seal and connects.

Preferably, the lifting power device comprises a support plate fixedly connected to the upper end face of the repairing agent storage box and positioned at the right side of the lifting rod, an electric cylinder is fixedly connected on the end face of the right side of the supporting plate, a three-stage telescopic rod extending downwards is arranged in the electric cylinder, the three-stage telescopic rod is fixedly connected with an air cylinder, an air cavity with an opening facing to the right is arranged in the air cylinder, a piston is connected in the air cavity in a sliding way, an inclined plane limiting rod extending left and right is fixedly connected on the piston, an auxiliary compression spring is connected between the piston and the inner wall of the right side of the air cavity, the inclined plane limiting rod can extend into the limiting hole, the end surface of the front side of the fixing plate is connected with a rack in a sliding way, the end surface of the upper side of the rack is fixedly connected with an L-shaped rod, the L-shaped rod can be abutted to the inclined plane limiting rod, and a compression spring is connected between the L-shaped rod and the supporting block.

Preferably, a gear shaft extending forwards is rotatably connected to the end face of the front side of the auxiliary support plate, a gear meshed with the rack is fixedly connected to the gear shaft, a crank located on the front side of the gear is fixedly connected to the gear shaft, a fixed block is fixedly connected to the end face of the upper side of the extrusion plate, a connecting rod is hinged between the fixed block and the crank, a hose is connected between the auxiliary air cavity and the air cavity, and the check valve is communicated upwards in one direction.

Preferably, the polishing paint spraying device comprises a polishing liquid storage box fixedly connected to the left end face of the repairing agent storage box, an auxiliary liquid pump is arranged on the lower end face of the polishing liquid storage box, an auxiliary connecting pipe is connected to the lower end face of the auxiliary liquid pump in a communicating manner, an auxiliary spray pipe is connected to the auxiliary connecting pipe in a communicating manner, four auxiliary spray heads are distributed on the auxiliary spray pipe from front to back in an array manner, openings of the auxiliary spray heads face to the lower right side, a motor shaft extending downwards is rotatably connected to the lower end face of the repairing agent storage box, the motor shaft is located on the right side of the polishing liquid storage box, a motor fixedly connected to the lower end face of the repairing agent storage box is in a power connection manner, a polishing wheel is fixedly connected to the motor shaft, a paint spraying cover with a downward opening is fixedly connected to the right end face of, the spray painting storage box is characterized in that a liquid pump is arranged on the lower side end face of the spray painting storage box, a connecting pipe is connected to the lower side end face of the liquid pump in a communicating mode, a spray pipe is connected to the connecting pipe in a communicating mode, and a spray head is connected to the lower side end face of the spray pipe in a communicating mode.

The invention has the beneficial effects that: the liquid injection repairing device disclosed by the invention can automatically inject the repairing agent through the electric cylinder, the repairing agent recovery device can ensure that the injected repairing agent automatically stops injecting after reaching a set value, then the repairing agent recovery device can fully flow into the scratches by further pressurizing the repairing agent, and the redundant repairing agent is recovered, so that the repairing device can automatically adapt to repairing scratches with different depths and sizes, has a better plastic scratch repairing effect, is easy to ensure the repairing quality, and meanwhile, the polishing and painting device can treat shallow scratches and can paint and repair plastic scratches.

Drawings

For ease of illustration, the invention is described in detail by the following specific examples and figures.

FIG. 1 is a schematic view of an overall structure of a scratch repairing device for a surface of a plastic part according to the present invention;

FIG. 2 is an enlarged view of the structure at "A" in FIG. 1;

FIG. 3 is an enlarged view of the structure at "B" in FIG. 1;

FIG. 4 is a schematic view of the structure in the direction "C-C" of FIG. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1 to 4, for the sake of convenience of description, the following orientations are now defined: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to a plastic part surface scratch repairing device, which is mainly applied to plastic surface treatment, and the invention is further explained by combining the attached drawings of the invention: the invention relates to a plastic part surface scratch repairing device, which comprises a repairing agent storage box 11, wherein an injection repairing device 101 is arranged on the repairing agent storage box 11, the injection repairing device 101 is used for storing and injecting repairing agent to the plastic surface, the injection repairing device 101 comprises a repairing agent storage cavity 12 which is arranged in the repairing agent storage box 11 and has an upward opening, a supporting rod 14 is fixedly connected to the end surface of the lower side of the repairing agent storage cavity 12, a sealing box 16 which is positioned at the lower side of the repairing agent storage box 11 is fixedly connected to the supporting rod 14, a 38 which has a downward opening is arranged in the sealing box 16, a push plate 13 is slidably connected in the repairing agent storage cavity 12, a lifting power device 102 which is positioned at the upper right side of the injection repairing device 101 is arranged on the repairing agent storage box 11, and the lifting power device 102 provides lifting motion required by injecting the repairing agent and recovering redundant repairing, the lower side of the repairing agent storage box 11 is provided with a repairing liquid recovery device 103, the repairing liquid recovery device 103 is used for detecting the injection pressure of the repairing agent, so that the repairing agent can be fully conveyed into a plastic scratch, the repairing liquid recovery device 103 can recover redundant repairing agent, the repairing liquid recovery device 103 comprises a squeezing plate 39 connected to the inner wall of the pressing plate 38 in a sliding manner, a one-way valve 42 is connected to the upper side end face of the squeezing plate 39 in a communication manner, a liquid conveying pipe 15 is connected between the one-way valve 42 and the repairing agent storage cavity 12 in a communication manner, a through hole 63 with the one-way valve 42 and with a downward opening is formed in the squeezing plate 39, an auxiliary cylinder 40 is fixedly connected to the upper side end face of the squeezing plate 39, an auxiliary air cavity 41 with a rightward opening is formed in the auxiliary cylinder 40, an auxiliary piston 59 is slidably connected to the auxiliary air cavity 41, and an auxiliary piston rod 61 extending downwards to the lower side end, fixedly connected with is located on the vice piston rod 61 lifter plate 62 of stripper plate 39 downside, fixedly connected with auxiliary support plate 54 on the terminal surface of the upside of seal box 16, be equipped with polishing paint spraying apparatus 104 on the restoration agent bin 11, polishing paint spraying apparatus 104 is used for polishing the working of plastics surface and removes the mar and repair with spraying paint.

Beneficially, the lifting rod 18 extending upwards is fixedly connected to the upper end face of the push plate 13, a left-right through limiting hole 22 is formed in the lifting rod 18, the limiting hole 22 is located on the upper side of the repairing agent storage box 11, a fixing plate 30 is fixedly connected to the right end face of the repairing agent storage box 11, a supporting block 29 is fixedly connected to the front end face of the fixing plate 30, a handle 32 located on the right side of the supporting block 29 is fixedly connected to the upper end face of the fixing plate 30, an injection tube 17 extending downwards into the sealing box 16 is connected to the lower end face of the repairing agent storage cavity 12 in a communicating mode, the injection tube 17 penetrates through the extrusion plate 39, and the injection tube 17 is in dynamic sealing connection with the extrusion plate 39.

Advantageously, the lifting power device 102 includes a supporting plate 19 fixedly connected to the upper end surface of the repairing agent storing box 11 and located on the right side of the lifting rod 18, an electric cylinder 25 is fixedly connected to the right end surface of the supporting plate 19, a three-stage telescopic rod 24 extending downward is arranged in the electric cylinder 25, an air cylinder 23 is fixedly connected to the three-stage telescopic rod 24, an air cavity 53 with a right opening is arranged in the air cylinder 23, a piston 51 is slidably connected to the air cavity 53, a left and right extending inclined plane limiting rod 21 is fixedly connected to the piston 51, a secondary compression spring 52 is connected between the piston 51 and the inner wall of the right side of the air cavity 53, the inclined plane limiting rod 21 can extend into the limiting hole 22, a rack 27 is slidably connected to the front end surface of the fixing plate 30, an L-shaped rod 26 is fixedly connected to the upper end surface of the rack 27, and the L-shaped rod 26, a compression spring 28 is connected between the L-shaped rod 26 and the supporting block 29.

Advantageously, a gear shaft 56 extending forwards is rotatably connected to the front end face of the auxiliary supporting plate 54, a gear 55 engaged with the rack 27 is fixedly connected to the gear shaft 56, a crank 57 located at the front side of the gear 55 is fixedly connected to the gear shaft 56, a fixed block 60 is fixedly connected to the upper end face of the extrusion plate 39, a connecting rod 58 is hinged between the fixed block 60 and the crank 57, a hose 20 is connected between the auxiliary air chamber 41 and the air chamber 53, and the check valve 42 is communicated upwards in one direction.

Advantageously, the polishing and painting device 104 comprises a polishing solution storage tank 50 fixedly connected to the left end surface of the repairing agent storage tank 11, an auxiliary solution pump 49 is arranged on the lower end surface of the polishing solution storage tank 50, an auxiliary connection pipe 48 is connected to the lower end surface of the auxiliary solution pump 49 in a communicating manner, an auxiliary spray pipe 47 is connected to the auxiliary connection pipe 48 in a communicating manner, four auxiliary spray heads 46 are distributed on the auxiliary spray pipe 47 from front to back in an array manner, the auxiliary spray heads 46 are opened towards the lower right side, a motor shaft 44 extending downwards is rotatably connected to the lower end surface of the repairing agent storage tank 11, the motor shaft 44 is positioned at the right side of the polishing solution storage tank 50, a motor 43 fixedly connected to the lower end surface of the repairing agent storage tank 11 is dynamically connected to the motor shaft 44, a polishing wheel 45 is fixedly connected to the motor shaft 44, and a paint spraying, fixedly connected with bin 31 that sprays paint on the cover 33 upside terminal surface that sprays paint, be equipped with liquid pump 34 on the bin 31 downside terminal surface that sprays paint, the expert is connected with connecting pipe 35 on the 34 downside terminal surface of liquid pump, the expert is connected with spray tube 36 on the connecting pipe 35, the expert is connected with shower nozzle 37 on the 36 downside terminal surface of spray tube.

The following will describe in detail the use steps of a scratch repairing device for the surface of a plastic part with reference to fig. 1 to 4: initial state: the push plate 13 is positioned at the upper limit position, the repairing agent is stored in the repairing agent storage cavity 12, the polishing solution is stored in the polishing solution storage tank 50, the paint is stored in the paint spraying storage tank 31, the three-stage telescopic rod 24 is in a contraction state, the air cylinder 23 is positioned at the upper limit position, the piston 51 and the inclined plane limiting rod 21 are positioned at the left limit position under the action of the auxiliary compression spring 52, the inclined plane limiting rod 21 extends into the limiting hole 22, the inclined plane limiting rod 21 is positioned at the upper side of the L-shaped rod 26, the L-shaped rod 26 and the rack 27 are positioned at the upper limit position, and the auxiliary piston 59, the auxiliary piston rod 61 and the lifting plate 62 are positioned at the lower limit position; during operation, an operator holds the handle 32, moves the repairing agent storage box 11 to a position where scratches are formed on the surface of a plastic part, then places the polishing wheel 45, the sealing box 16 and the paint spraying cover 33 on the surface of the plastic part, enables the scratches to be located on the left side of the polishing wheel 45, then pushes the repairing agent storage box 11 leftwards, meanwhile, the motor 43 and the auxiliary liquid pump 49 are started, the motor 43 drives the motor shaft 44 and the polishing wheel 45 to rotate, the auxiliary liquid pump 49 sprays polishing liquid in the polishing liquid storage box 50 to the polishing wheel 45 and the surface of the plastic part through the auxiliary connecting pipe 48, the auxiliary spray pipe 47 and the auxiliary spray head 46, and the polishing wheel 45 removes the scratches with shallower surfaces of the plastic part through; after the treatment of the shallow scratches is finished, the motor 43 and the secondary liquid pump 49 are turned off, an operator manually wipes off the polished surface of the plastic part, then the plastic part 38 is moved to the deep scratches on the surface of the plastic part, then the electric cylinder 25 is started, the electric cylinder 25 drives the three-stage telescopic rod 24, the air cylinder 23 and the inclined plane limiting rod 21 to move downwards, the inclined plane limiting rod 21 drives the lifting rod 18 and the push plate 13 to move downwards through the limiting hole 22, the push plate 13 moves downwards to convey the repairing agent in the repairing agent storage cavity 12 into the plastic part 38 through the injection pipe 17, the liquid level of the repairing agent is high and pushes the lifting plate 62 to move upwards along with the increase of the repairing dose in the plastic part 38, when the plastic part 38 is filled with the repairing agent and reaches the set pressure, the lifting plate 62 drives the secondary piston rod 61 and the secondary piston 59 to move upwards to the upper limit position, the air flow generated by the upward movement of the secondary piston, the inclined plane limiting rod 21 is separated from the contact with the limiting hole 22, so that the lifting rod 18 and the push plate 13 stop moving downwards, the injection of the repairing agent is stopped, the cylinder 23 continues to move downwards, the inclined plane limiting rod 21 is abutted against the L-shaped rod 26 and pushes the L-shaped rod 26 to move downwards, the L-shaped rod 26 drives the rack 27 to move downwards, the rack 27 is meshed with the connecting gear 55 to rotate, the gear 55 rotates to drive the gear shaft 56 and the crank 57 to rotate, the crank 57 drives the extrusion plate 39 to move downwards firstly through the connecting rod 58, so that the extrusion plate 39 moves downwards to extrude the repairing agent in the pipe 38, the repairing agent fully flows into the scratch, the repairing agent can automatically adapt to the repairing of different depths and sizes, meanwhile, the extrusion plate 39 moves downwards to enable the repairing agent on the lower side of the extrusion plate 39 to be conveyed back into the repairing agent storage cavity 12 through the through hole 63, the one-way valve 42 and the infusion pipe 15 to be stored in the repairing agent storage cavity 12, when, then the extrusion plate 39 moves upwards to reset, and the repair of the deeper scratch of the plastic part is completed; then the electric cylinder 25 drives the three-stage telescopic rod 24 and the air cylinder 23 to move upwards for resetting, the piston 51 moves leftwards under the action of the auxiliary compression spring 52 in the upwards moving process, then the inclined plane limiting rod 21 is contacted with the lifting rod 18, the air flow generated by the leftward movement of the piston 51 pushes the auxiliary piston 59 to move downwards through the hose 20 for resetting, and after the inclined plane limiting rod 21 moves upwards to the limiting hole 22, the inclined plane limiting rod 21 moves leftwards into the limiting hole 22 under the action of the auxiliary compression spring 52, so that the auxiliary piston 59 and the lifting plate 62 move downwards for resetting; when needs repair the plastic part surface that sprays paint, manual removal repairing agent bin 11 makes the cover 33 that sprays paint be located the plastic part surface department that needs repair, and later liquid pump 34 starts, and liquid pump 34 sprays the plastic part surface through connecting pipe 35, spray tube 36, shower nozzle 37 with the interior paint of bin 31 that sprays paint and repairs.

In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.

Claims

1. The utility model provides a surface scratch prosthetic devices of working of plastics, includes repairing agent bin, its characterized in that: the repairing agent storage box is provided with an injection repairing device, the injection repairing device is used for storing and injecting repairing agent to the surface of plastic, the injection repairing device comprises a repairing agent storage cavity which is arranged in the repairing agent storage box and has an upward opening, a supporting rod is fixedly connected to the lower side end face of the repairing agent storage cavity, a sealing box which is arranged on the lower side of the repairing agent storage box is fixedly connected to the supporting rod, an opening is arranged in the sealing box and is downward, a push plate is slidably connected to the inside of the repairing agent storage cavity, a lifting power device which is arranged on the upper right side of the injection repairing device is arranged on the repairing agent storage box, the lifting power device provides lifting motion required for injecting the repairing agent and recovering the redundant repairing agent, a repairing liquid recovery device is arranged on the lower side of the repairing agent storage box and is used for detecting the injection pressure, thereby guarantee in the repairing agent can fully carry the plastics mar, just repairing liquid recovery unit can retrieve unnecessary repairing agent, repairing liquid recovery unit includes sliding connection in the stripper plate on the inner wall, the last intercommunication of stripper plate upside terminal surface is connected with the check valve, the check valve with repair agent stores and is connected with the transfer line mutually between the chamber, be equipped with on the stripper plate with the through-hole that the check valve communicates with each other and the opening is down, fixedly connected with vice cylinder on the stripper plate upside terminal surface, be equipped with the vice air cavity that the opening is right in the vice cylinder, sliding connection has vice piston in the vice air cavity, fixedly connected with on the vice piston downside terminal surface down extends to the vice piston rod outside the stripper plate downside terminal surface, fixedly connected with is located the lifter plate of stripper plate downside on the vice piston rod, fixedly connected with the vice backup pad on the seal box upside terminal surface, be equipped with polishing paint spraying apparatus on the repairing agent bin, polishing paint spraying apparatus is used for polishing the working of plastics surface and removes the mar and the restoration of spraying paint.

2. The plastic part surface scratch repair apparatus of claim 1, wherein: fixedly connected with lifter that upwards extends on the push pedal side end face, be equipped with the spacing hole that link up about in the lifter, just spacing hole is located restorative agent bin upside, fixedly connected with fixed plate on the restoration agent bin right side end face, fixedly connected with supporting shoe on the fixed plate front end face, fixedly connected with is located on the fixed plate upside end face the handle on supporting shoe right side, communicate with each other on the restoration agent storage chamber downside terminal surface and be connected with the injection tube that downwardly extends to the seal box in, the injection tube runs through the stripper plate, just the injection tube with the stripper plate is the dynamic seal and connects.

3. The plastic part surface scratch repair apparatus of claim 2, wherein: the lifting power device comprises a supporting plate which is fixedly connected on the upper end surface of the repairing agent storage box and is positioned on the right side of the lifting rod, an electric cylinder is fixedly connected on the end face of the right side of the supporting plate, a three-stage telescopic rod extending downwards is arranged in the electric cylinder, the three-stage telescopic rod is fixedly connected with an air cylinder, an air cavity with an opening facing to the right is arranged in the air cylinder, a piston is connected in the air cavity in a sliding way, an inclined plane limiting rod extending left and right is fixedly connected on the piston, an auxiliary compression spring is connected between the piston and the inner wall of the right side of the air cavity, the inclined plane limiting rod can extend into the limiting hole, the end surface of the front side of the fixing plate is connected with a rack in a sliding way, the end surface of the upper side of the rack is fixedly connected with an L-shaped rod, the L-shaped rod can be abutted to the inclined plane limiting rod, and a compression spring is connected between the L-shaped rod and the supporting block.

4. A scratch repair device for a plastic part according to claim 3, wherein: the auxiliary supporting plate is characterized in that a gear shaft extending forwards is rotatably connected to the end face of the front side of the auxiliary supporting plate, a gear meshed with the rack is fixedly connected to the gear shaft, a crank located on the front side of the gear is fixedly connected to the gear shaft, a fixed block is fixedly connected to the end face of the upper side of the extrusion plate, a connecting rod is hinged between the fixed block and the crank, a hose is connected between the auxiliary air cavity and the air cavity in a communicating mode, and the check valve is communicated upwards in a one-way mode.

5. The plastic part surface scratch repair apparatus of claim 1, wherein: the polishing paint spraying device comprises a polishing liquid storage box fixedly connected to the left end face of the repairing agent storage box, an auxiliary liquid pump is arranged on the lower end face of the polishing liquid storage box, an auxiliary connecting pipe is connected to the lower end face of the auxiliary liquid pump in a communicating manner, an auxiliary spray pipe is connected to the auxiliary connecting pipe in a communicating manner, four auxiliary spray heads are distributed on the auxiliary spray pipe from front to back in an array manner, openings of the auxiliary spray heads face to the lower right side, a motor shaft extending downwards is connected to the lower end face of the repairing agent storage box in a rotating manner, the motor shaft is positioned on the right side of the polishing liquid storage box, a motor fixedly connected to the lower end face of the repairing agent storage box is in a power connection manner, a polishing wheel is fixedly connected to the motor shaft, a paint spraying hood with an opening facing downwards is fixedly connected, the spray painting storage box is characterized in that a liquid pump is arranged on the lower side end face of the spray painting storage box, a connecting pipe is connected to the lower side end face of the liquid pump in a communicating mode, a spray pipe is connected to the connecting pipe in a communicating mode, and a spray head is connected to the lower side end face of the spray pipe in a communicating mode.