JPH072222B2 - Continuous coating method and device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous coating method of a gauze (extra fine mesh cloth) to be used as a surface material for surface covers of speakers and reflectors of televisions and stereos, and an apparatus used directly for its implementation.

[0002]

2. Description of the Related Art A gauze made of polyester fiber, which is mainly black, is applied to the surface of televisions, stereo speakers, reflectors, etc. as a cover material. Conventionally, the coating method as shown in the schematic view of FIG. 7 has been adopted.

In the figure, a is a paint spray nozzle, b is a cradle,
c is gauze and d is spray paint. In the conventional coating method, in order to prevent the bending, the gauze c is placed on the pedestal b under tension, and the paint d is sprayed from above from the paint spray nozzle a to evenly spread the sprayed paint d. It was intended to paint the gauze c.

[0004]

However, according to the above-mentioned conventional coating method, the spray paint d sprayed from the paint spray nozzle a above by the pedestal b on which the gauze c is placed.
Adheres to the gauze c and causes clogging in the ultrafine mesh of the gauze c that is the object to be coated due to surface tension and capillary phenomenon. It goes without saying that if the clogged gauze c is used as the surface material of the surface cover of a speaker, a reflector, etc., sound loss will be worse and cannot be used.

Further, since the gauze c is manually attached to the pedestal b by tension every time it is coated or removed by drying, the production efficiency is extremely poor and the cost is increased. In view of the above conventional problems, the present invention provides a continuous gauze coating method and apparatus that does not cause clogging during coating.

[0006]

The solution to the above-mentioned problems can be achieved by adopting the novel characteristic construction method and means listed in the following by the present invention. That is, the features of the method of the present invention are:
This is a continuous gauze coating method in which clogging is avoided by applying a negative pressure to the lower side of the gauze that moves at a constant speed while maintaining tension in the biaxial direction of the forward direction and the direction orthogonal to this direction and performing spray coating from the upper side.

The first feature of the device of the present invention is that of a gauze supply device that sequentially pays out the gauze rolls for paying out, which are the objects to be coated, which are rotatably attached and detached, and the gauze sent from the gauze supply device. A gauze consisting of parallel endless chain conveyors that pierce near both edges and pull forward and set tension in the forward direction and in the width direction orthogonal to this, which holds tension in the biaxial direction and can be driven by a reversible motor. A tension transport unit, a centering adjustment control unit that aligns and adjusts the widthwise center of the preceding stage of the silk tension transport unit with the traveling center of the mesh sent out from the mesh feeder, and the intermediate stage of the silk tension transport unit. In the predetermined closed enclosure area, a spraying nozzle is provided which is capable of reciprocating in the direction orthogonal to the forward direction of the upper side, and a coating section which opens a suction duct communicating with an exhaust fan on the lower side, and the parallel endless chain from the coating section Conveyor The main body device provided with a drying unit provided in a predetermined closed envelope region in the latter stage of the gland tension transporting unit for drying the gauze discharged by hot air, and the parallel endless chain from the drying unit to the end of the gland tensioning transport unit. A continuous gauze coating device comprising a gauze winding device that sequentially winds and removes gauze discharged from a conveyor through a guiding part that receives and guides the gauze to be wound and wound.

A second feature of the device of the present invention is that the centering adjustment control unit in the first feature is arranged such that the base ends of the left and right parallel side frames of the front stage of the cloth tension transfer unit are respectively connected to the intermediate stages of the tension fiber transfer unit. The inner ends of a pair of left and right butterfly shafts penetrating in the width direction over the female screw hole block fixed to each lower side of the front ends of the parallel side frames and the bearing, respectively, while independently swinging in the left-right width direction at the front end. The pulleys for driving the reversible motors are fixed on the other side, and on the other hand, the positions of both side edges of the gauze are detected, and the reversible motors are aligned so that the center of the width direction of the parallel side frames can be tracked and aligned. In the gauze continuous coating device, gauze side edge detection sensors for instructing reverse rotation control are made to face the gauze side edge passing positions on the front ends of the parallel side frames.

[0009]

In the present invention, since the method and means as described above are taken, the feeding rolls for feeding which are detachably supported by idling are sequentially fed out from the outer side, and are passed through the centering adjustment control unit so as to be in the uniaxial width direction of the gauze. While aligning the widthwise centers of the mesh tensioning unit, the pin-tuck group of the parallel endless chain conveyor in the mesh tensioning unit sequentially pierces along both sides of the mesh and tensions in the biaxial direction by pulling forward. While holding it, convey it to the coating section.

In the coating section, the parallel endless chain conveyor similar to the mesh tensioning and conveying section holds the mesh in a biaxial direction while reciprocating in the width and uniaxial directions of the mesh suspended above. The spray paint from the spray nozzle and the outside air introduced from the outside to the upper side are collectively sucked from the suction duct opening to the lower space of the gauze, and the spray paint and the outside air are applied to the gauze having a negative pressure on the lower side. Pass through the mesh and force it to the lower side, and paint without clogging.

The coated gauze is carried into the drying section while being tensioned and held by the parallel endless chain conveyor as described above. Also in the drying section, the paint adhered to the gauze is dried and solidified by the hot air drying method while the tension is maintained by the parallel endless chain conveyor as described above.
The dried gauze is released from the parallel endless chain conveyor of the main body device, is guided downward to the advancing direction by the gauze guide portion and is guided to the winding gauze roll, and the winding gauze is concerned. It is sequentially wound up by a winding roll to become the same winding roll as before coating.

[0012]

【Example】

(Example of Device) An embodiment of the device of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view of the continuous gauze coating apparatus of this embodiment, and FIG.
A plan view, FIG. 3 is a partially cutaway schematic front view for explaining the same coating process, FIG. 4 is a schematic perspective view for explaining a chain conveyor that conveys gauze, FIG. 5 is an enlarged side view of the same main parts, and FIG. It is an installation support state explanatory view of a winding roll.

In the figure, A is a continuous coater, B is a gauze, C is a main body device, 1 is a gauze supply device, 2 is a gauze guide roll, 3 is a gauze side edge detection sensor, 4 is a feeding gauze roll, α is a cloth conveying unit, 5, 5'is a reversible motor, 6 is an endless belt,
Reference numeral 6'denotes an endless chain, 7 is a side wheel holding side wheel, 8 is a drive shaft, 8a and 10a are sprockets, 9 and 9 are parallel endless chain conveyors which face each other at regular intervals, and 10 is a driven shaft.

Β is a coating part, βa is a closed coating chamber, 11 is a pintuck implant block, 12 is a pintuck, 13 is a spray nozzle, 14 is a moving rail, 15 is a ventilation window, 16 is a suction duct, 16a is an outlet, Reference numeral 17 is an exhaust fan, 18 is a ventilation filter, 19 is an exhaust fan drive motor, 20 is an operation door, 21 is a suction port, and 21a is an exhaust filter.

Γ is a drying part, γa is a closed drying chamber, 22 is an exhaust fan, 23 is a thermometer, 24 is a gauze winding device, 25 is a gauze roll for winding, and 26 and 27 are gauze induction rolls of the induction part. Is. ε is a centering adjustment control unit, 28 is a left and right parallel side frame, 29 is a bearing, 30 is a screw shaft, 31 is a female screw hole block, 32 is a pulley, 33 is a screw number, 34 is a left / right fine adjustment limit sensor, and 35 Is a rotating handle, 36 is a spiral rod, 3
7 is a taper type support member, 38 is a cylindrical core shaft, 39 is a fixing member, 40 is a steam radiator with a backwind fan 41, 4
Reference numeral 2 is a differential pressure sensor, and 43 is a winding cloth roll shaft. still,
The same reference numerals are given to the same members in the drawings.

(Example of Method) Here, an example of a procedure for carrying out the method of the present invention applied to the continuous gauze coating apparatus A will be described along with a series of processing steps of a gauze. Since the object B to be coated B is conveyed to the process step in the form of a roll as a feeding gauze roll 4 for feeding, to the gauze coating device A, both ends of the cylindrical core shaft 38 of the gauze supply device 1 are connected as shown in FIG. The sandwiching support member 37 is used to support the inner fitting so as to rotate freely and to be loaded. The gauze B sequentially peeled off and fed from the gauze supply device 1 passes through the gauze guide roll 2 and the left and right gauze side edge detection sensors 3 and 3 and is guided to the gauze tension conveying section α.

At the beginning, the gauze B is pulled to the gland tension conveying part α by human power and is tensioned in the width direction, and along the vicinity of both side edges, the chain conveyors 9 and 9 of the gland tension conveying part α. To the pin tuck group 12, and then the chain conveyors 9 and 9 are operated, and the driving force of the chain conveyors 9 and 9 pulls the pin tuck group 12 forward to move the gauze B forward and in the width direction orthogonal thereto. Hold the tension in the biaxial direction and pull.

The gauze B guided to the gauze tension conveying section α is
The left and right parallel endless chains shown in FIG. 4 are continuously installed in the longitudinal direction of the gauze continuous coating device A, sequentially over the front-stage centering adjustment control unit ε, the intermediate-stage coating unit β, and the rear-stage drying unit γ over the entire length of the silk-tensioned conveying unit α. The pin tuck 12 group shown in FIG. 5 which is arranged upright outward along the shaded portions of the conveyors 9, 9 penetrates the vicinity of both side edges, and is tensioned and conveyed in the biaxial directions.

The pin tuck 12 group is appropriately set up as a set and is planted on the pin tuck implant block 11, and the pin tuck implant block 11 is fixed to the link 9a of the chain conveyor 9. The drive shaft 8 of the chain conveyors 9 and 9 is rotatable by a motor 5 whose speed is variable via a chain 6'and a sprocket 8a.

Incidentally, the other driven shaft 10 is free to rotate by means of a sprocket 10a so that the chain conveyor 9,
9 is supported. Therefore, the motor 5 can be operated at any rotation speed.
, The drive shaft 8 which is interlocked is rotated, the left and right chain conveyors 9 and 9 for holding the gauze B near the left and right side edges of the pin tuck 12 group are operated, and the gauze B is a gauze coating device. A is conveyed at an arbitrary speed in the longitudinal direction.

When the gauze B passes through the front stage area of the gauze tension transporting part α, the centering adjustment control part ε operates to move forward and the center of the width interval between the left and right side frames 28, 28 is set at the center of the width of the gauze B. By always following and aligning with each other, the both side edges of the mesh B are prevented from coming off from the left and right parallel endless chain conveyors 9, 9.

That is, the gauze B sent from the gauze supply device 1
Gauze side edge detection sensors 3 and 3 detect the passage position of each gauze B side edge, and gauze side edge detection sensors 3 and 3
When left and right are deviated from the center of the left and right, the left and right reversible motors 5 and 5 are respectively rotated forward and backward by an amount corresponding to the left and right deviation amount, and the left and right screw shafts 30 and 30 are respectively screwed through the left and right pulleys 32 and 32. The left and right parallel side frames 28 integrated with the left and right female screw hole blocks 31, 31 which are screwed together.
28 is finely oscillated right and left around the left and right hinges 33, 33.

The gauze B, which is tensioned and held in the biaxial direction by the gauze tension transfer section α, is transferred into the closed coating chamber βa of the coating section β in the next intermediate stage area. As shown in FIG. 3, in the coating part β closed coating room βa, while the mesh B is tensioned and held by the chain conveyors 9 and 9 in the same manner as described above, the mesh B is bridged in the left-right direction (width direction with respect to the mesh B). The mesh B is coated with the spray paint d indicated by the dotted arrow in the figure, which is sprayed from the spray nozzle 13 suspended downward so that the movable rail 14 can be moved by a reciprocating device (not shown).

When the spray nozzle 13 reciprocates at a high speed in the width direction with respect to the gauze B, the spray paint d applied to the gauze B can be made uniform in the width direction. The speed at which the spray nozzle 13 moves on the moving rail 14, the amount of spray paint, and the pressure are variable. Therefore, in combination with the movement of the mesh B by the chain conveyors 9 and 9 at an arbitrary speed, the amount of spray paint per unit area on the mesh B can be freely adjusted.

The spray paint d sprayed from the spray nozzle 13 has a negative pressure on the lower side of the gauze B communicating with the spray paint d due to the action of the exhaust fan 17, so the gauze B is coated and sucked and passed downward. After that, it is drawn into the suction duct 16 by the exhaust force of the exhaust fan 17 driven by the exhaust fan drive motor 19 which is provided near the outside of the exhaust port 16a through the suction port 21 in which the exhaust filter 21a is sealed,
The gauze coating device A is discharged to the outside. A plurality of spray nozzles 13 can be arranged.

During coating, the outside air that has passed through the ventilation filter 18 is introduced through the ventilation window 15 in the ceiling of the coating section β hermetic coating room βa, so that after the spray paint d has passed through the gauze B, It is sucked into the suction duct 16. Therefore, it is possible to avoid clogging of the gauze B, which is the object to be coated, due to the combination of the spray paint and the passage of the gauze B from the outside air.

Ventilation filter 18 and intake filter 22
When the meter of the differential pressure sensor 42 indicates an abnormal value due to pressure fluctuations in the closed coating chamber βa due to clogging of the product and obstructing distribution, the work monitoring personnel stop the operation of the continuous gauze coating device A and start new ventilation. Filter 18 and intake filter 2
Replace with 2. It should be noted that the operation door 20 is opened for repair of a failure or replacement of parts in the coating section β.

The gauze B coated in the coating section β is conveyed to the closed drying chamber γa of the drying section γ while being tensioned by the chain conveyors 9 and 9. In the drying part γ, the paint d uniformly sprayed on the gauze B is dried and solidified, but the hot air drying method is adopted in view of prevention of fire and local heating of the gauze B. That is, the radiator 40 that sucks the outside air by the backwind fan 41 and passes the steam inside
It is circulated in the airtight drying chamber γa and uniformly exposed to the passing silk cloth B to eliminate unevenness in drying.

The thermometer 23 constantly measures the temperature in the closed drying chamber γa of the drying section γ, while the exhaust fan 22
Is for promoting exhaust from the closed drying chamber γa. The gauze B dried in the drying section γ reaches the end of the chain conveyors 9 and 9 and is released from the pin tuck 12 group,
In other words, the tension holding in the biaxial direction is released, and then the cloth winding device 24 is headed.

In the gauze winding device 24, the gauze B is oriented downward by sandwiching two gauze guide rolls 26 and 27, and then a cylindrical core shaft whose both ends are supported by a sandwiching support member 37 and a fixing member 39. It is wound around the roll 38 and is sequentially wound and formed on the winding roll 25 for winding, and becomes the same roll shape as before coating. The cloth B is wound and conveyed to the cloth winding device 24 by a driving force of the reversible motor 5 being transmitted to the winding cloth roll shaft 43 through a chain 6'group. It is synchronously wound around the core shaft 38.

In short, according to the continuous coating method of the present invention, the pin tucks 12 are pierced in the vicinity of both side edges and towed forward to maintain the tension in the biaxial direction of the forward direction and the direction orthogonal thereto while maintaining the endless parallel endlessness. It was possible to avoid clogging by spray coating with the spray nozzle 13 that reciprocates from the upper side in the left-right width direction by using a negative pressure on the lower side of the gauze B that travels at a constant speed on the chain conveyors 9, 9.

[0032]

As described above, according to the present invention, when the gauze is coated in the coating part, the gauze is preliminarily held in the biaxial direction by the gland tension conveying part to prevent the spray paint from deviating, and The upper spray nozzle is reciprocally moved at high speed in the width direction to eliminate the unevenness of the spray paint itself, and the outside air introduced from the upper ventilation window is sucked into the space below the gauze by the suction force of the exhaust fan. Since the coating is carried out by passing the gauze as a pressure, the probability of clogging against the surface tension of the paint droplets adhering to the gauze and the adverse effect of the capillary phenomenon is extremely low.

Further, in the drying section for drying and solidifying the paint applied to the gauze which has been coated, a hot air drying method which does not cause a fire or the like and which does not cause local heating on the surface of the gauze is adopted. As a result, it has excellent practicability and usefulness such as high quality throughout the painting and drying process.

[Brief description of drawings]

FIG. 1 is a side view of a continuous gauze coating apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a partially cutaway schematic front view illustrating the coating process of the above.

FIG. 4 is a schematic perspective view illustrating a left-right parallel endless chain conveyor.

FIG. 5 is an enlarged side view of the main part of the same.

FIG. 6 is an explanatory view of a mounting support state of a winding roll.

FIG. 7 is a schematic diagram showing a conventional method for coating gauze.

[Explanation of symbols]

 a ... paint spray nozzle b ... cradle c ... gauze d ... spray paint A ... gauze continuous coating device B ... gauze 1 ... gauze supply device 2 ... gauze guide roll 3 ... gauze side edge detection sensor 4 ... feeding gauze roll α ... Tension conveyor unit 5, 5 '... Reversible motor 6 ... Endless belt 6' ... Endless chain 7 ... Shaft edge suppressing wheel 8 ... Drive shaft 8a, 10a ... Sprocket 9, 9 ... Parallel endless chain conveyor 10 ... Follower shaft β: coating section 11: pintuck implant block 12 ... pintuck 13 ... spray nozzle 14 ... moving rail 15 ... ventilation window 16 ... suction duct 16a ... exhaust port 17 ... exhaust fan 18 ... ventilation filter 19 ... exhaust fan drive motor 20 ... operation Door 21 ... Suction port 21a ... Exhaust filter γ ... Drying part 22 ... Exhaust fan 23 ... Thermometer 24 ... Mesh winding device 25 ... Winding roll 26 for winding 7 ... Silk guide roll ε ... Centering adjustment control unit 28 ... Parallel side frame 29 ... Bearing 30 ... Spiral shaft 31 ... Female screw hole block 32 ... Pulley 33 ... Hinge 35 ... Rotation handle 36 ... Spiral rod 37 ... Tapered grip Support member 38 ... Cylindrical core shaft 39 ... Fixing member 40 ... Steam radiator 41 ... Backwind fan 43 ... Winding cloth roll shaft

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B05D 7/04 8720-4D H04R 9/02 Z 8421-5H

Claims (3)

[Claims] 1. A clogging is avoided by applying a negative pressure to the lower side of a gauze that moves at a constant speed while maintaining tension in a biaxial direction of a forward direction and a direction orthogonal to the forward direction and performing spray coating from the upper side. Continuous coating method 2. A gauze supply device for sequentially feeding out a gauze roll for payout as an object to be coated, which is rotatably attached / detached freely, and pierces in the vicinity of both side edges of the gauze sent from the gauze supply device and pulls it forward. Then, a mesh tensioning section comprising a parallel endless chain conveyor having pin tucks for maintaining tension in the biaxial direction of the forward direction and the width direction orthogonal thereto and being driven by a reversible motor, and the mesh supply. A centering adjustment control unit that aligns and adjusts the widthwise center of the preceding stage of the gauze tension transfer unit with the center of movement of the gauze sent out from the device, and the upper side within a predetermined closed enclosure area of the intermediate stage of the gauze tension transfer unit. The spraying nozzle provided with a spray nozzle reciprocally movable in the direction orthogonal to the forward direction and having an opening of a suction duct communicating with the exhaust fan on the lower side, and the gauze discharged from the spraying section by the parallel endless chain conveyor. The heat Provided in a predetermined sealing circumscribing region of the gauze tension conveying section subsequent to drying the drying section and the main body device comprising a,
From the drying section to the end of the mesh tensioning section, the mesh discharged from the parallel endless chain conveyor is sequentially wound on and off as a winding roll for winding, which is rotatably and rotatably supported by a guiding unit that receives and guides the mesh. Gauze continuous coating device comprising a take-up device 3. A centering adjustment control unit hinges the base ends of the left and right parallel side frames of the front stage of the tensioning conveyor independently to the front end of the middle stage of the tensioning conveyor so as to be swingable in the left-right width direction. On the other hand, each reversible motor driven pulley is fixed to each inner end of a pair of left and right butterfly shafts penetrating in the width direction across the female screw hole block fixed to each lower side of the front ends of the parallel side frames, and the other side. The side edge detection sensor for detecting the side edges of the parallel side frames to detect the forward and reverse directions of the reversible motors so that the center of the parallel side frames can be tracked and aligned to the center of the width direction of the parallel side frames. 3. The gauze continuous coating device according to claim 2, wherein the gauze continuous coating device faces each side of the gauze on both front edges thereof.