JP5684198B2 - Tire surface printing method and tire printing apparatus - Google Patents

Description

  The present invention relates to a tire surface printing method and a tire printing apparatus for printing information such as letters and patterns on an automobile tire.

  2. Description of the Related Art Conventionally, when displaying information such as characters and patterns on an automobile tire, the tire is stamped. That is, a mold with display information is formed on a mold used for vulcanizing a tire, and a tire is loaded on the mold so that the display information is stamped on the tire surface by pressure. Yes.

  However, the mold with mold has poor versatility and is required for each display information. For this reason, it has been proposed to manufacture a display seal with information such as characters and pictures, and to attach the display seal to a predetermined position of the tire during vulcanization (see, for example, Patent Document 1). . Thereby, the versatility of a mold increases and it can aim at the improvement of tire productivity.

JP 2008-056055 A

  However, since the display sticker described above is difficult to be automatically applied to a specific position on the raw tire, it is usually attached manually, and there is a problem in the accuracy of the attaching position and productivity. Moreover, it is difficult to stick the display seal on the curved surface of the tire without wrinkles and without filling the internal pressure. Further, when sticking the display seal, foreign matter adheres to the tire surface, which may become the nucleus of the starting point of cracking, and tire performance may be deteriorated.

  The present invention has been made in view of such problems, and the object of the present invention is to improve the tire performance without wrinkles, by satisfying the positional accuracy and productivity, such as letters and pictures on the side of the tire. An object of the present invention is to provide a tire surface printing method and a tire printing apparatus capable of printing without causing the printing.

In order to achieve the above object, the tire surface printing method of the present invention assembles a vulcanized tire with a rim, fills the rim-assembled tire with an internal pressure, and a rotation main axis passing through the center of the tire is vertical. in the horizontal state the tire, the tire side with irregularities character of the tire, an inkjet method, discharging paint from the printer head of the air spray type or airless spraying, by coating, multi-printing of desired characters A method of printing a tire surface by color printing , wherein the rotation main shaft is driven by a rotation driving device, and the tire is rotated at a constant speed along with the rotation of the rotation main shaft, and is formed on a side surface of the rotating tire. The step of detecting the uneven characters by the unevenness detecting means, and the pre-set at a position spaced from the detected uneven characters in the tire circumferential direction. Discharging paint from Taheddo, comprising a step of performing coating to at multicolor printing desired characters, the coating material discharged from the printer head, dried with a drying and curing devices, comprising the steps of curing, It is characterized by that.

In the tire surface printing method of the present invention, it is preferable that a part of the uneven character detected by the unevenness detecting means is set as a rotation origin and a desired character is printed by multicolor printing .
In the tire surface printing method of the present invention, among the concavo-convex characters detected by the concavo-convex detection unit, the character detected last by the concavo-convex detection unit is set as a rotation origin, and a desired character is printed by multicolor printing. It is preferable.
The tire surface printing method of the present invention further includes a step of detecting a rotation amount of the tire by a rotary encoder, and the step of printing the desired character by multicolor printing is based on the rotation amount based on the printer head. Is preferably synchronized with a predetermined timing from the passage of the rotation origin.

Further, the tire printing apparatus of the present invention is arranged in the vicinity of a tire that is rim-assembled and filled with internal pressure and rotates in a horizontal state so that a rotation main shaft passing through the center of the tire is vertical. An inkjet type, air spray type or airless spray type printer head that discharges paint onto a side surface of a tire having uneven characters and applies and prints a desired character by multi-color printing, and rotates the rotation spindle The tire is rotated at a constant speed along with the rotation of the rotation main shaft, the uneven character formed on the side surface of the rotating tire is detected by the unevenness detecting means, and the tire circumferential direction is detected from the detected uneven character. to a location spaced, the discharge from the printer head to paint, be made in a multi-color printing of desired characters by coating, said printer head La discharge paint, drying, characterized by curing with drying and curing devices.

In the tire printing apparatus according to the present invention, it is preferable that a part of the uneven character detected by the unevenness detecting unit is set as a rotation origin to print a desired character by multicolor printing .
In the tire printing apparatus according to the present invention, among the uneven characters detected by the unevenness detecting means, the character detected last by the unevenness detecting means is set as the rotation origin, and a desired character is printed by multicolor printing. It is preferable.
The tire printing apparatus according to the present invention further includes a rotary encoder that detects the amount of rotation of the tire, and printing performed by multicolor printing of the desired character starts operation of the printer head based on the amount of rotation. It is preferable that this is performed in synchronization with a predetermined timing from the passage of the rotation origin.

  Since the present invention can automatically print characters, patterns and the like at specific positions on the tire side surface, the printing position accuracy and productivity can be satisfied by all automatic operations.

  Moreover, since this invention prints on the tire filled with the internal pressure, a character, a pattern, etc. can be printed on a curved surface of a tire side surface without wrinkles.

  Further, in the present invention, since foreign matter does not adhere to the tire surface, there is no possibility that the foreign matter will be a starting point to cause cracks, and tire performance will not be deteriorated.

It is a schematic block diagram of the printing apparatus which implements the tire surface printing method which concerns on this Embodiment. It is a flowchart explaining the tire surface printing method of this invention. FIG. 4 is a diagram illustrating an example of a print output image of a printer head. It is a figure which shows the uneven | corrugated character and print output image of a tire side surface. 6 is a timing chart of an output signal of the unevenness detection sensor and a print control signal output to the printer head.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a printing apparatus that performs the tire surface printing method according to the present embodiment.

  An ink jet printer that prints desired characters, pictures, symbols, patterns, etc. (predetermined patterns) on the tire surface in the vicinity of the side surface of the tire 1 that is assembled with a rim and filled with an internal pressure and inflated into a regular shape. A head 2, a concavo-convex detection sensor 3 that detects a specific concavo-convex character on the rotating tire surface from the outside, and a UV that dries and cures the paint applied to the tire surface by the printer head 2 adjacent to the printer head 2. An (ultraviolet) irradiation lamp 4 is arranged.

  The printer head 2 can employ an air spray method, an airless spray method, or the like in addition to the ink jet method. In addition, when performing multicolor printing by simultaneous rotation, a plurality of printer heads are arranged according to the number of paint colors. A laser displacement meter or the like is used for the unevenness detection sensor 3. Further, although the UV irradiation lamp 4 is used for drying and curing the paint, a hot air fan may be used.

  Further, the tire rotation main shaft 6 passing through the center hole of the tire wheel 5 is driven by the rotation shaft driving device 7, and the tire 1 rotates (counterclockwise) with the rotation of the tire rotation main shaft 6. The rotary shaft drive device 7 is provided with a rotary encoder 9 via a belt 8 in order to synchronize the rotation origin of the tire 1 and the operation start timing of the printer head 2. The rotary encoder 9 detects the amount of rotation of the tire 1 and transmits the detected amount of rotation as a signal (pulse signal) to a PC (personal computer) 10 that is a control device.

  The PC 10 includes a print control unit 11, an origin setting unit 12, a synchronization unit 13, and a rotation control unit 14. The print control unit 11 is connected to the printer head 2 and outputs a print control signal and a print data signal to the printer head 2. The origin setting means 12 is connected to the concavo-convex detection sensor 3. If the concavo-convex pattern data of the concavo-convex character output from the concavo-convex detection sensor 3 matches the concavo-convex pattern data previously stored in the PC 10, For example, a specific uneven character of the uneven pattern is set as the origin of tire rotation. The synchronization means 13 is connected to the rotary encoder 9 and detects a signal from the rotary encoder 9 to synchronize the start of operation of the printer head 2 with the tire rotation origin at a predetermined timing. By synchronizing the start of operation of the printer head 2 with the rotation origin of the tire at a predetermined timing, the relationship between the position of the concavo-convex characters formed by the tire mold and the printing position can be kept constant each time. The rotation control means 14 is connected to the rotating shaft driving device 7 and controls the rotating shaft driving device 7 so that the tire 1 rotates at a constant speed.

  The functions of the print control unit 11, the origin setting unit 12, the synchronization unit 13, and the rotation control unit 14 are realized by executing software (programs) held by the PC 10.

  Next, operation | movement of the tire surface printing method of this invention is demonstrated according to the flowchart of FIG. First, the vulcanized tire is automatically assembled with a rim (S101), and the rim-assembled tire is filled with internal pressure and inflated into a regular shape (S102). As shown in FIG. 1, the inflated tire 1 is installed in the printing device through the tire rotation main shaft 6 in the center hole of the tire wheel 5, and the tire rotation main shaft 6 is driven by the rotation shaft driving device 7 to rotate the tire 1. (S103). Next, the specific uneven character formed by the tire mold on the rotating tire surface is detected from the outside by the unevenness detection sensor 3, and the specific uneven character detected by the unevenness detection sensor 3 is used as the rotation origin of the tire 1. (S104). Next, the amount of rotation of the tire 1 is detected by a rotary encoder 9 installed on the tire rotation main shaft 6, and the amount of rotation from the rotation origin of the tire 1 is transmitted as a signal (pulse signal) to the synchronization means 13. (S105). While maintaining the relationship between the position of the specific concavo-convex character and the printing position constant, the paint is discharged from the printer head 2 onto the side surface of the rotating tire 1 and applied to form a desired character, pattern, symbol, pattern, etc. A (predetermined pattern) is drawn (printed) (S106). Next, the applied paint is dried and cured by the UV irradiation lamp 4 installed adjacently (S107).

  FIG. 3 is a diagram illustrating an example of a print output image of the printer head, and FIG. 4 is a diagram illustrating uneven characters formed on the tire side surface and a print output image printed on the tire side surface. Concave and convex characters 15 of “D4280” are formed on the side surface of the tire 1, and “ZERO” characters 16 are printed from the uneven characters 15 at regular intervals.

  FIG. 5 is a timing chart of the output signal of the unevenness detection sensor and the print control signal output to the printer head.

The origin setting means 12 collates the concavo-convex pattern signal of the concavo-convex character “D4280” output from the concavo-convex detection sensor 3 with the concavo-convex pattern data of the concavo-convex character “D4280” stored in the PC (personal computer) 10 in advance. If they match, the last character “0” of “D4280” is set as a specific uneven character serving as the origin of tire rotation. The synchronizing means 13 counts the number of pulses generated by the rotary encoder 9 and synchronizes the start of operation of the printer head 2 with the timing of time t ₀ with the passage of the tire rotation origin. The print control unit 11 outputs a print control signal to the printer head 2 and further outputs a print data signal of the character “ZERO”, and the printer head 2 prints the character 16 of “ZERO” on the tire side surface.

  As described above, according to the present invention, it is possible to automatically print a character, a pattern, or the like at a specific position on the side surface of the tire, so that the printing position accuracy and productivity can be improved. Further, according to the present invention, printing is performed on a tire that is assembled with a rim and filled with internal pressure, so that characters, pictures, and the like can be printed on the curved surface of the tire without wrinkles. Furthermore, according to the present invention, foreign matter does not adhere to the tire surface, so that the foreign matter does not cause cracks and the tire performance is not deteriorated.

DESCRIPTION OF SYMBOLS 1 Tire 2 Printer head 3 Concavity and convexity detection sensor 4 UV irradiation lamp 5 Tire wheel 6 Tire rotation main shaft 7 Rotating shaft drive device 8 Belt 9 Rotary encoder 10 PC
DESCRIPTION OF SYMBOLS 11 Print control means 12 Origin setting means 13 Synchronization means 14 Rotation control means 15 Concave and convex characters 16 Print characters

Claims (8)

The tire after vulcanization is assembled with a rim, the tire is assembled with internal pressure, and the tire is placed horizontally so that the rotation main axis passing through the center of the tire is vertical, and the tire has uneven characters. A tire surface printing method in which a paint is discharged from a printer head of an ink jet method, an air spray method or an airless spray method on a side surface of a tire, applied, and a desired character is printed by multicolor printing ,
Driving the rotary spindle by a rotary drive device, and rotating the tire at a constant speed along with the rotation of the rotary spindle;
Detecting the concavo-convex characters formed on the side surface of the rotating tire by the concavo-convex detection means;
Discharging the paint from the printer head to a position separated from the detected uneven character in the tire circumferential direction, applying and printing a desired character by multicolor printing ; and
Drying and curing the paint discharged from the printer head using a drying / curing means;
A tire surface printing method comprising: 2. The tire surface printing method according to claim 1, wherein a part of the uneven character detected by the unevenness detecting unit is set as a rotation origin to print a desired character by multicolor printing. 3. The uneven character detected by the unevenness detecting unit is set to a rotation origin at a character detected last by the unevenness detecting unit, and a desired character is printed by multicolor printing. The tire surface printing method described. A step of detecting the amount of rotation of the tire by a rotary encoder;
  The step of performing printing of the desired character by multi-color printing is based on the rotation amount, and the start of operation of the printer head is synchronized with a predetermined timing from the passage of the rotation origin. The tire surface printing method described. Rotate in a horizontal state so that the main axis of rotation passing through the center of the tire is vertical, rim assembled, and placed near the tire filled with internal pressure. And an ink jet type, air spray type or airless spray type printer head that applies and prints a desired character by multicolor printing.
The rotation main shaft is driven by a rotation driving device, the tire is rotated at a constant speed along with the rotation of the rotation main shaft,
The uneven character formed on the side surface of the rotating tire is detected by an unevenness detecting means,
In a position spaced in the tire circumferential direction from the detected uneven characters, the paint is discharged from the printer head, applied to perform printing of desired characters by multicolor printing,
A tire printing apparatus characterized in that the paint discharged from the printer head is dried and cured using a drying / curing means. 6. The tire printing apparatus according to claim 5, wherein a part of the uneven character detected by the unevenness detecting means is set as a rotation origin to print a desired character by multicolor printing. 7. The desired character is printed by multi-color printing by setting the character detected last by the unevenness detecting means among the uneven characters detected by the unevenness detecting means as a rotation origin. The printing apparatus for tires as described. A rotary encoder that detects the amount of rotation of the tire;
8. The printing performed by multicolor printing of the desired character is performed based on the rotation amount, and the operation of the printer head is started in synchronization with a predetermined timing from the passage of the rotation origin. Tire printing equipment.

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