JP4629248B2 - Supply method of marking paint for automobile wheels - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of supplying a marking paint required for forming a phase mark for an automobile wheel.
[0002]
[Prior art]
In the manufacturing process of an automobile wheel, in the marking process of forming a phase mark at the phase point of the automobile wheel, for example, the transfer surface of the marking jig is pressed against a stamp stand coated with a predetermined marking paint. After the marking paint was attached to the transfer surface, the transfer mark of the marking jig was brought into contact with a predetermined position as the phase point of the wheel for an automobile, and the marking paint was applied to form the phase mark. . Here, the phase point means that both the eccentricity of the vehicle wheel and the tire are inspected in advance when the vehicle wheel and the tire are set, and the minimum diameter position of the vehicle wheel and the maximum diameter position of the tire are set together. The minimum diameter position of the vehicle wheel for offsetting the eccentricity of the vehicle is described, and is an important mark showing the matching between the vehicle wheel and the tire.
[0003]
In the marking paint supply method in which the marking paint is attached to the transfer surface of the marking jig using the stamp stand as described above, the transfer surface of the marking jig is repeatedly pressed against a specific position of the stamp stand. Marking defects occur due to a decrease in the marking paint on the portion and insufficient marking paint adhering to the transfer surface of the marking jig. Therefore, appropriate marking is performed by supplying the marking paint from the paint tank that stores the marking paint as needed and replenishing the marking paint appropriately at the position where the marking jig of the stamp base is pressed. .
[0004]
[Problems to be solved by the invention]
However, the process of forming a phase mark on an automobile wheel is generally performed under normal temperature and normal pressure. Therefore, the marking paint existing on the stamp table as described above undergoes a change over time, and the volatilization of the paint progresses. The vaporization of the components proceeds, and the viscosity of the paint increases. Due to this increase in viscosity, the marking paint does not sufficiently adhere to the transfer surface of the marking jig, and phase marking marking defects are likely to occur. Even if the marking paint is appropriately supplied to the stamp stand as described above, a difference in viscosity is generated between the supplied marking paint and the high-viscosity marking paint remaining on the stamp stand. Because both marking paint and high-viscosity marking paint adhere to the transfer surface of the marking jig, the phase mark may be blurred or the size of the phase mark is insufficient when forming a phase mark for an automobile wheel. And the like, and the marking defect rate tends to be relatively high.
[0005]
Also, in the conventional marking paint supply method using such a stamp stand, even if the work process is automated for rationalization such as labor saving, the marking paint fails as described above, and the production efficiency is increased. Therefore, it is necessary to take measures such as arranging an operator for adjusting the viscosity of the marking paint, and as a result, the manufacturing cost is increased. In addition, the viscosity of the marking paint must be appropriately replenished with a diluted solution of the paint, but there may be a problem that the mark defect rate varies depending on the skill level of the worker in charge.
[0006]
Furthermore, in the method of supplying the marking paint using the stamp table as described above, the stamping table is partially deformed by pressing the transfer surface of the marking jig on the stamp table. Since it does not adhere sufficiently to the transfer surface of the marking jig, only about 60% of the supply amount of marking paint is used, which causes further marking failure and increases the cost of the paint, and forms an appropriate phase mark. However, it was very difficult.
The present invention aims to solve such problems.
[0007]
[Means for Solving the Problems]
The present invention relates to a marking jig for forming a phase mark by transferring a marking paint adhered to a transfer surface to a predetermined portion of an automobile wheel, and a suction device for supplying the marking paint to the transfer surface. A storage groove that includes a coating transfer table having a copying recess formed on the surface thereof, and a support sheet that intermittently travels on the coating transfer table. A step of supplying a predetermined amount of marking paint to the storage groove, a transfer step of inserting a marking jig into the storage groove and attaching the marking paint to the transfer surface, and the marking jig Then, after moving the transfer surface to make contact with a predetermined portion of the wheel for an automobile, the renewal step of releasing the suction action of the suction device and moving the carrier sheet by a predetermined amount sequentially Characterized in that the rows (unit of claim 1).
[0008]
In this way, as a method for supplying the marking paint, the storage groove on the carrier sheet for supplying the marking paint is formed by marking the storage groove by sequentially executing the four processes of the storage groove generation process, the supply process, the transfer process, and the update process. Each time the marking paint is attached to the transfer surface, a new marking paint is formed on the holding sheet and a new marking paint is supplied to the storage groove. Since it is constantly updated, a marking paint having an appropriate viscosity can always be used, and the marking defect rate can be reduced.
[0009]
In the storage groove generating step, the suction device communicating with the inner surface of the copying recess provided on the surface of the coating material transfer table is operated by suction while the carrying sheet intermittently running on the coating material transfer table is stopped. As a result, the carrier sheet is copied and closely adhered to the inner surface of the copying concave portion to generate a storage groove. Here, the storage groove stores marking paint for adhering the marking paint to the transfer surface of the marking jig in the transfer process, so that an appropriate phase mark is formed on the transfer surface of the marking jig. It is necessary to have a size capable of adhering a necessary amount of marking coating material, and it is necessary to make the depth and shape of the storage groove appropriate to the shape of the transfer surface. For example, if the transfer surface has a hemispherical shape, the inner surface of the concave portion of the paint transfer table surface is configured so that the storage groove forms a similar hemispherical shape that is slightly larger than the shape of the transfer surface, and an appropriate amount of marking paint is applied. You may make it adhere to a transfer surface.
[0010]
Since the marking paint is supplied to such a storage groove in a supply step described later, it is necessary to form a storage groove so that the marking paint can be supplied properly. The storage groove is formed so that the sheet is closely contacted by the suction operation of the suction device. As a suction operation by such a suction device, for example, a suction hole or the like communicating with the suction device is provided on the inner surface of the copying recess, and the suction device can perform appropriate suction that closely follows the inner surface of the copying recess without tearing the carrier sheet. The storage groove may be formed by performing a suction operation by force. In addition, a plurality of such copying recesses may be present on the surface of the paint transfer table, whereby a storage groove can be generated simultaneously in the plurality of copying recesses. The number of paint colors corresponding to the number of copying recesses can be used at once, or the advantage that a phase mark can be formed simultaneously for a plurality of automobile wheels can be produced.
[0011]
Next, as a supplying step of supplying the marking paint to the storage groove, it is ideal that all the marking paint by one supply adheres to the transfer surface of the marking jig and is marked on the wheel for the automobile. For this reason, when the transfer surface of the marking jig is inserted into the storage groove, it is desirable to supply the storage groove with an amount of paint that allows the marking paint to adhere to the entire transfer surface. In practice, the size of the storage groove is optimized with respect to the size of the transfer surface of the marking jig, the viscosity of the marking paint is optimized, etc., and at least the amount of marking paint necessary for displaying the phase point is dispensed once. To supply. As a method of supplying such marking paint to the storage groove, for example, a method of supplying from a marking paint storage tank or the like through a discharge valve or the like may be used, or from a storage tank of the marking paint by a dropper or the like. It is also possible to use a method of suctioning once and supplying the storage groove.
[0012]
Next, as the above transfer process, the marking jig moved after the phase mark is formed on the wheel for the automobile is inserted into the storage groove to which the marking paint is supplied in the supplying process, thereby marking the marking paint. Transfer.
Here, in order to sufficiently display the phase point, it is desirable that the marking paint adheres to the entire transfer surface.
[0013]
Next, as the above-described updating process, after the marking jig having the marking coating adhered to the transfer surface in the transfer process disengages the transfer surface from the storage groove, the suction operation of the suction device that generates and holds the storage groove is performed. The holding sheet is moved by a predetermined amount so that a new portion of the carrying sheet is arranged on the coating material transfer table, and the process proceeds to the storage groove generating step again. In this case, the marking paint remaining in the storage groove moves together with the storage groove trace.
[0014]
As a method of moving the carrier sheet as described above, the carrier sheet is wound around in advance, and the carrier sheet is not cut off in the sheet roll from the sheet roll body supported on the roll shaft, and is moved on the coating material transfer table. It is proposed that the vehicle is pulled out so as to pass and intermittently travel so as to move by a predetermined amount at a predetermined timing in the update process (means of claim 2). Since the carrier sheet is used by being pulled out from the sheet roll body onto the paint transfer table, it is desirable that the carrier sheet is moved without being cut. Further, as the moving amount of the carrier sheet, at least a distance that does not overlap the storage groove traces used in the transfer process with the new storage grooves generated in the subsequent storage groove generation process is necessary. As such a feed mechanism for moving the carrying sheet, for example, the carrying sheet may be sandwiched by rollers from above and below, and the carrying sheet may be moved by rotating the roller, or another roll shaft member. It is also possible to adopt a configuration in which the carrier sheet moves by winding the carrier sheet around.
[0015]
As such a carrier sheet, a vinyl sheet is proposed (means of claim 3). The carrying sheet is excellent in stretchability corresponding to close contact with the concave portion by suction and in conformity to the inner surface of the concave portion provided on the surface of the paint transfer table, and each of the marking paint supply methods according to the present invention. It is desirable that the process has a strength that does not cause laceration and that the cost is relatively low. As such, a vinyl sheet is preferably used. Further, as a substitute for the vinyl sheet, for example, a polyethylene film or the like may be used.
[0016]
In order to form an appropriate phase mark at the phase point of an automobile wheel by sequentially repeating the four processes of the storage groove generation process, the supply process, the transfer process, and the update process, which are related to each other. The marking paint will be supplied. In order for these four processes to proceed efficiently, for example, a marking jig having a transfer surface to which marking paint is attached in the transfer process forms a phase mark on a predetermined automobile wheel, and then attaches the marking paint again. By reaching the transfer process, the working time of each process can be set so that the update process, the storage groove generation process, and the supply process are completed.
[0017]
Further, after the phase mark is formed on the wheel for an automobile, a step for cleaning the transfer surface of the marking jig may be provided before the marking jig moves to the next transfer process. Since the marking paint remaining on the transfer surface after the mark is formed can be removed, there is an advantage that only a new paint can be used when the next phase mark is formed. As such cleaning, cleaning with a solvent, cleaning with ultrasonic waves, or the like can be used.
[0018]
On the other hand, at the supplier that stores the marking paint supplied to the storage groove, the marking paint is supplied to the storage groove by using a shielding paint tank or the like as the supply source so that the viscosity of the marking paint does not increase with time. It is also proposed to do this (means of claim 4). In this way, by using the shielding paint tank as the supplier of the marking paint, it is possible to prevent the marking paint from directly touching the outside air, and thus it is possible to prevent vaporization of the volatile components of the marking paint. In order to maintain the viscosity of the marking paint in the shielding paint tank appropriately, for example, a circulation pump is provided in the shielding paint tank, or a facility for applying heat to maintain a constant temperature is provided. You can also do it.
[0019]
According to the marking paint supply method of the present invention, the marking paint for forming the phase mark on the automobile wheel can always be maintained in an appropriate viscosity state, so that the occurrence of defects due to defective marking can be reduced. become.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a specific example of a marking paint supply apparatus using the marking paint supply method according to the present invention.
[0021]
FIG. 1 is a top view of a marking coating material supply apparatus 1, which includes a coating transfer table 2 having a copying recess 3 having a suction hole 4 communicating with a suction device (not shown) on the surface, The carrying sheet 5 that is copied and closely adhered to the inner surface of the copying recess 3 is wound, and the sheet roll body 6 that is supported by the roll shaft as a play body and the carrying sheet 5 are pulled out from the sheet roll body 6 and intermittently moved on the paint transfer table 2 A feed roller 8 that travels, a carrying sheet feed motor 9 that drives the feed roller 8, and a tension roller 7 that applies tension to the carrying sheet 5 that moves on the paint transfer table 2 are provided. The marking coating material supply device 1 is also provided with an ultrasonic cleaning device 10 for cleaning the transfer surface 17 after the marking jig 11 forms the phase mark and before the transfer to the transfer process again. The marking jig 11 moves between the marking coating material supply device 1 and a device that detects the phase point of the wheel for an automobile and executes the formation of the phase mark. A phase mark is formed on a predetermined automobile wheel by the marking paint adhered thereto.
[0022]
FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG. 1, and the marking paint supply device 1 applies marking paint to the storage groove 12 generated by being closely adhered to the inner surface of the copying recess 3 on the paint transfer table 2. A shielding paint tank 14 provided with a paint discharge valve 13 to be supplied is disposed, and the marking paint is supplied from the shielding paint tank 14 to the storage groove through the discharge nozzle 15 by the paint discharge valve 13. The shielding paint tank 14 blocks the outside air and the marking paint in the shielding paint tank 14. In addition, a circulation pump 18 is connected to the shielding paint tank 14 so that the viscosity of the marking paint can be properly maintained by the circulation pump 18. Furthermore, the circulation pump 18 is connected to a marking paint storage tank (not shown), and a facility capable of appropriately supplying the marking paint from the storage tank so that the shielding paint tank 14 can always store and maintain a predetermined amount. It may be arranged.
[0023]
Next, the operation of the marking paint supply apparatus 1 will be described with reference to FIGS.
First, the storage groove | channel production | generation process which produces | generates the storage groove | channel 12 for storing marking paint is demonstrated according to FIG. A suction device (not shown) in which the carrier sheet 5 which has been stationary after being moved by the feed roller 8 on the coating material transfer table 2 by a predetermined amount communicates with the hemispherical copying recess 3 formed on the surface of the coating material transfer table 2 is suctioned. By actuating (indicated by an arrow), suction is performed from the suction hole 4 provided in the concave portion 3, and makes contact with each inner surface of the concave portion 3 to generate the storage groove 12. When the storage groove 12 is generated, the tension roller 7 is adjusted so that an appropriate tension is applied so that excessive tension is applied to the carrier sheet 5 and the carrier sheet 5 is not torn.
[0024]
Next, the supply process for supplying the marking paint to the storage groove 12 generated in the storage groove generation process will be described with reference to FIG. When the storage groove 12 is generated, the coating material discharge valve 13 discharges a predetermined amount of the marking paint into the storage groove 12 from the shielding paint tank 14 storing the marking paint with an appropriate viscosity. It is supplied to the storage groove 12. Here, the paint discharge valve 13 may discharge the marking paint through the discharge nozzle 15 extending to the vicinity of the storage groove 12 so that the marking paint does not leak from the storage groove 12 when discharging the marking paint. . In addition, since the storage groove | channel 12 shown in a present Example shall be shape | molded in three places, you may arrange | position three sets of shielding paint tanks 14 and the paint discharge valve 13 so that each storage groove | channel 12 may be corresponded. If the same paint is used, the marking paint may be supplied to each storage groove 12 from one shielding paint tank via the three paint discharge valves 13.
[0025]
Next, a transfer process for attaching the marking paint stored in the storage groove 12 to the transfer surface 17 of the marking jig 11 will be described with reference to FIG. A marking jig 11 in which a phase mark is formed on an automobile wheel cleans the transfer surface 17 with the ultrasonic cleaning device 10 and moves to the marking paint supply device 1. The marking jig 11 moves to the upper area of the storage groove 12 where the marking paint is stored by the above supply process, and the transfer surface 17 of the marking jig 11 descends toward the storage groove 12 to store the transfer surface 17. It inserts in the groove | channel 12 and the marking coating material stored is made to adhere. At this time, the transfer surface 17 may be pressed against the storage groove 12 by a predetermined pressure appropriately set according to the type and viscosity of the marking paint so that an appropriate amount of marking paint adheres to the transfer surface 17. In the present embodiment, the same transfer process is performed on the other storage grooves 12 not shown in FIG. 5 in a simultaneous sequence.
[0026]
Next, the update process of the carrying sheet 5 constituting the storage groove 12 will be described with reference to FIG. The transfer surface 17 to which a predetermined amount of marking paint is applied is raised by the transfer process, and the marking jig 11 moves to form a phase mark on a predetermined automobile wheel. The suction operation of the suction device is stopped synchronously, the feed roller 8 is driven, the storage portion 16 that is the trace of the storage groove 12 is separated from the paint transfer table 2, and a new portion of the carrier sheet 5 is on the paint transfer table 2. The carrying sheet 5 is moved by a predetermined amount so as to be disposed on the surface. At this time, an appropriate tension is applied to the carrier sheet 5 by the tension roller 7 so that a new portion of the carrier sheet 5 is arranged at an appropriate position on the coating material transfer table 2. After this update process, the process proceeds to the storage groove generation process again.
[0027]
It is efficient that the marking paint supply is performed smoothly and quickly as a whole by making the above-mentioned four processes of the storage groove generation process, supply process, transfer process and update process operate in relation to each other. is there. For example, in the update process, after the marking jig 11 having the marking paint adhered to the transfer surface 17 forms a phase mark on a predetermined automobile wheel, the transfer surface 17 is cleaned with the ultrasonic cleaning device 10 and the marking paint is again applied. In accordance with the timing of shifting to the transfer process for adhesion, the update process, the storage groove generating process, and the supply process proceed so that the marking paint is supplied to the new storage groove 12, and the phase point The time for marking can be used efficiently.
[0028]
On the other hand, in the transfer process, the marking paint remaining without adhering to the transfer surface 17 of the marking jig 11 moves as the carrier sheet 5 moves in the renewal process, as shown in FIG. The portion of the supporting sheet 5 having the storage portion 16 to which the used marking paint is attached can be discarded or reused after washing. Here, it is also proposed to make the upper feed roller 8 a circular rectangle so that the marking paint remaining on the carrier sheet 5 does not contact the marking paint supply apparatus 1.
[0029]
The present invention is not limited to this embodiment, and can be implemented in various forms without departing from the gist of the present invention.
[0030]
【The invention's effect】
The present invention provides a marking paint supply method for forming a phase mark of an automobile wheel, and a storage groove is provided by bringing a carrier sheet into close contact with a copying recess provided on a paint transfer table, and the marking paint is supplied to the storage groove. After that, the transfer surface of the marking jig is inserted into the storage groove to attach the marking paint, and then the carrying sheet is moved by a predetermined amount, so that a series of processes for forming a new storage groove again is repeated. Therefore, the marking paint to be attached to the transfer surface of the marking jig that forms the phase mark is always a newly supplied marking paint, so the viscosity does not increase due to changes in the marking paint over time, and the appropriate marking paint is stable. Thus, the marking defect rate can be reduced.
[0031]
In the conventional method apparatus, because the marking defect due to the increase in the viscosity of the marking paint, a process such as dilution of the marking paint by an operator was required, whereas in the apparatus of the method according to the present invention, the marking paint always having an appropriate viscosity Since the problem caused by the defective marking is solved, the marking device for the phase point of the automobile wheel can be saved, and the manufacturing cost can be expected to be reduced.
[0032]
For the storage groove for supplying the marking paint according to the present invention, the sheet supply operation accompanying the generation of the storage groove can be rationalized by using a carrier sheet that moves intermittently from a winding roll wound with a long sheet. In addition, since the carrying sheet portion having the marking paint remaining without adhering to the transfer surface of the marking jig is automatically processed, the labor cost can be reduced. Moreover, in order to produce | generate the storage groove | channel suitable for supplying a marking coating material, the cost which concerns on manufacture can be suppressed by using a comparatively cheap vinyl sheet as a support sheet excellent in a stretching property.
[Brief description of the drawings]
FIG. 1 is a top view of a specific example of a marking paint supply apparatus according to a marking paint supply method according to the present invention.
FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG.
FIG. 3 is a progress diagram in a specific example of a storage groove generating step according to the present invention.
FIG. 4 is a progress diagram in a specific example of a paint supply process according to the present invention.
FIG. 5 is a progress diagram in a specific example of a paint transfer process according to the present invention.
FIG. 6 is a progress diagram in a specific example of the carrying sheet updating step according to the present invention.
FIG. 7 is a specific example showing the movement of the carrier sheet by the update process according to the present invention.
[Explanation of symbols]
2 Paint transfer table 3 Copying recess 5 Carrying sheet 6 Sheet roll body 8 Feed roller 11 Marking jig 12 Storage groove 14 Shielding tank 17 Transfer surface

Claims (4)

In the marking jig supplying the marking surface to the transfer surface of the marking jig that forms the phase mark by transferring the marking paint adhered to the transfer surface to a predetermined portion of the wheel for automobiles,
A paint transfer table having a copying recess communicating with the suction device formed on the surface, and a carrier sheet that intermittently travels on the paint transfer table;
A storage groove generating step for copying and closely adhering the carrier sheet to the inner surface of the concave portion by the suction action of the suction device;
A supplying step of supplying a predetermined amount of marking paint to the storage groove;
A transfer process in which a marking jig is inserted into the storage groove and the marking paint is attached to the transfer surface;
Further, after the marking jig moves to bring the transfer surface into contact with a predetermined portion of the wheel for an automobile, an update process for releasing the suction action of the suction device and moving the carrying sheet by a predetermined amount is sequentially executed. A method for supplying marking paint for a wheel for an automobile. A renewal process is performed by supporting a sheet roll body formed by winding a support sheet in a roll shape on a roll shaft, pulling out the support sheet from the sheet roll body, and intermittently running on the paint transfer table. The marking paint supply method for an automobile wheel according to claim 1, wherein the marking paint is supplied. The method for supplying marking paint for an automobile wheel according to claim 1 or 2, wherein the carrier sheet that intermittently travels on the paint transfer table is a vinyl sheet. 4. The supplying step of supplying a predetermined amount of marking paint to the storage groove, wherein the marking paint having a predetermined viscosity is supplied from the shielding paint tank. Supply method of marking paint for automobile wheels.

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