JP2016210088A - Manufacturing apparatus of rubber strip, and manufacturing method of rubber strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing technology of a rubber strip capable of adjusting a width of a rubber strip, which has become unstable to a suitable width in a short time.SOLUTION: A manufacturing apparatus of a rubber strip includes a rubber extruder for continuously extruding rubber from its discharge port and a calender roll for rolling the rubber extruded from the discharge port to form a rubber strip. The apparatus is further equipped with a width sensor for measuring the width of the rubber strip in real time at the downstream of the calender roll and a sequencer for transmitting a stop signal for stopping extrusion from the rubber extruder when the width of the rubber strip measured by the width sensor deviates from a prescribed standard value. The sequencer is configured to store the width of the rubber strip measured by the width sensor at a prescribed time as time-series data. Further, the apparatus includes display means for displaying the time-series data of the width of the rubber strip stored in the sequencer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rubber strip manufacturing apparatus and a rubber strip manufacturing method for manufacturing a rubber strip used in strip wind forming.

  One method of manufacturing a pneumatic tire is strip wind molding in which a rubber member for a tire is formed by spirally winding a belt-shaped rubber strip (for example, Patent Document 1).

  FIG. 4 is a schematic view schematically showing a conventional rubber strip manufacturing apparatus for manufacturing the rubber strip. As shown in FIG. 4, in the rubber strip manufacturing apparatus 100, a sheet-like rubber material G <b> 1 is introduced into a rubber extruder 102 having a screw 106 driven by a motor 104, and is linearly formed from a discharge port 108 of the rubber extruder 102. After the rubber is extruded, the rubber strip G2 is manufactured by rolling using the calender rolls 110a and 110b.

  At this time, in order for the rubber strip G2 to be wound around the outer peripheral surface of the molding drum in an orderly manner, it is required that the width of the manufactured rubber strip G2 is controlled to be constant. For this reason, conventionally, the width sensors 112a and 112b are disposed downstream of the calendar rolls 110a and 110b to measure the width of the rubber strip G2, and when the measurement result deviates from the standard value, the apparatus is stopped, The operator prevents the outflow of defective products by adjusting the width of the rubber strip G2 based on the measurement result.

JP 2009-184152 A

  However, in the conventional rubber strip manufacturing apparatus described above, the width of the rubber strip G2 may become unstable when the rubber extrusion is restarted after the apparatus is stopped or when the speed of the motor 104 of the rubber extruder 102 is switched. is there. In this case, it is difficult for the operator to adjust the width of the rubber strip G2 that has become unstable to an appropriate width in a short time, and much time is required to adjust the width of the rubber strip G2.

  Then, this invention makes it a subject to provide the rubber strip manufacturing technique which can adjust the width | variety of the rubber strip which became unstable to an appropriate width in a short time.

The invention described in claim 1
A rubber strip manufacturing apparatus comprising: a rubber extruder that continuously extrudes rubber from a discharge port; and a calendar roll that forms a rubber strip by rolling the rubber extruded from the discharge port,
A width sensor disposed downstream of the calendar roll and measuring the width of the rubber strip in real time;
A sequencer for transmitting a stop signal for stopping the extrusion from the rubber extruder when the width of the rubber strip measured by the width sensor deviates from a predetermined standard value;
The sequencer is configured to store the width of the rubber strip at a predetermined time measured by the width sensor as time series data,
The rubber strip manufacturing apparatus further comprises display means for displaying time series data of the width of the rubber strip stored in the sequencer.

The invention described in claim 2
A rubber strip manufacturing method using the rubber strip manufacturing apparatus according to claim 1,
The rubber strip manufacturing method, wherein the rubber strip is manufactured by adjusting the width of the rubber strip based on time series data of the width of the rubber strip displayed on the display means.

  ADVANTAGE OF THE INVENTION According to this invention, the rubber strip manufacturing technique which can adjust the width | variety of the rubber strip which became unstable to an appropriate width in a short time can be provided.

It is the schematic which shows typically the rubber strip manufacturing apparatus which concerns on one embodiment of this invention. It is a figure which shows typically the display means of the rubber strip manufacturing apparatus of FIG. It is a front view which shows a mode that a rubber strip is wound around a forming drum. It is the schematic which shows the conventional rubber strip manufacturing apparatus typically.

1. Problems of Conventional Rubber Strip Manufacturing Apparatus Prior to describing the rubber strip manufacturing apparatus of the present invention based on the embodiment, the problems of the above-described conventional rubber strip manufacturing apparatus will be specifically described.

  In the conventional rubber strip manufacturing apparatus, as shown in FIG. 4, width sensors 112a and 112b are provided downstream of the calendar rolls 110a and 110b, the width of the rubber strip G2 is measured, and the measured value deviates from the standard value. In such a case, the apparatus is stopped to prevent outflow of defective products, and the width of the rubber strip G2 is adjusted based on the width data measured by the width sensors 112a and 112b when restarting.

  The extrusion speed of the rubber extruder 102 can be switched by switching the high speed / low speed of the motor 104 of the rubber extruder 102. In this case as well, the width of the rubber strip G2 becomes unstable. The width of the rubber strip G2 is adjusted based on the width data measured by the width sensors 112a and 112b.

  Specifically, when the width adjustment of the rubber strip G2 as described above is performed, the rubber strip G2 is changed by changing the acceleration / deceleration time based on the real-time width data measured by the width sensors 112a and 112b. The width is adjusted so as to maintain the standard value. Specifically, the width of the rubber strip G2 is adjusted by changing the speed and acceleration / deceleration time of the calendar rolls 110a and 110b and the take-off rolls (not shown) downstream of the calendar rolls 110a and 110b.

  However, in the conventional rubber strip manufacturing apparatus 100, the acceleration / deceleration time and the like are adjusted based on real-time width data measured only by the width sensors 112a and 112b, so that the width of the rubber strip G2 is reduced for a short time. Therefore, it was difficult to adjust the width to an appropriate width, and it was necessary to make a trial and error adjustment by repeating the measurement of the width of the rubber strip G2 and the acceleration / deceleration time a plurality of times.

  Further, even after adjusting the acceleration / deceleration time, it is necessary to follow the extruded rubber strip G2 and check the width.

  As described above, in the conventional technique, it is not easy to adjust the width of the rubber strip G2 within a predetermined standard value in a short time, and much time is required.

  As a result of various investigations for solving these problems, the present inventor can adjust the acceleration / deceleration time in a short time by using the rubber strip manufacturing apparatus described below. It has been found that the time required for the adjustment can be significantly shortened compared to the conventional method.

  Hereinafter, a rubber strip manufacturing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

2. Rubber Strip Manufacturing Apparatus According to this Embodiment FIG. 1 is a schematic view schematically showing a rubber strip manufacturing apparatus according to this embodiment. As shown in FIG. 1, the rubber strip manufacturing apparatus 10 according to the present embodiment includes a rubber extruder 12, calendar rolls 20a and 20b, and width sensors 22a and 22b, as in the prior art. A sequencer 24 is provided to stop the extrusion from the rubber extruder 12 when the width of the rubber strip G2 measured by 22a and 22b deviates from a predetermined standard value.

  However, in the rubber strip manufacturing apparatus 10 according to the present embodiment, the sequencer 24 further uses the width data of the rubber strip G2 continuously measured in real time by the width sensors 22a and 22b as time series data for a predetermined time. This is different from the conventional apparatus in that it is configured so that it can be stored and a touch panel 26 is provided as a display means for displaying time-series width data stored in the sequencer 24. Hereinafter, each structure of the rubber strip manufacturing apparatus according to the present embodiment will be specifically described.

(1) Rubber Extruder The rubber extruder 12 includes a screw 16 that is rotationally driven by a motor 14 as in the prior art, and a sheet-like rubber material G1 is fed from an opening 13 above the rubber extruder 12. After the sheet-like rubber material G1 is plasticized by the screw 16, the linear rubber is continuously extruded from the discharge port 18. At this time, the extrusion speed is adjusted by switching the high speed / low speed of the motor 14.

(2) Calendar roll The calender rolls 20a and 20b are disposed downstream of the discharge port 18 of the rubber extruder 12, and the linear rubber extruded from the discharge port 18 is rolled to form a belt-shaped rubber strip G2. Mold.

(3) Width sensor The width sensors 22a and 22b are arranged on the downstream side of the calender rolls 20a and 20b, above and below the rubber strip G2 being conveyed, and measure the width of the rubber strip G2 in real time. 24. As the width sensors 22a and 22b, for example, an optical sensor such as LS-7000 manufactured by Keyence Corporation is used.

(4) Sequencer The sequencer 24 stops the extrusion from the rubber extruder 12 when the width data of the rubber strip G2 measured by the width sensors 22a and 22b deviates from a predetermined standard value as in the conventional case. A stop signal is transmitted to a control means (not shown). However, in the present embodiment, the sequencer 24 is further configured to store the width data of the rubber strip G2 transmitted from the width sensors 22a and 22b as time-series data for a predetermined time. For this sequencer 24, for example, a sequencer MP2200 manufactured by Yaskawa Electric Corporation is used.

(5) Touch Panel The touch panel 26 is connected to the sequencer 24 and is configured to display the time-series width data stored in the sequencer 24 as a graph (see FIG. 2) in real time. For the touch panel 26, for example, a touch panel AGP3500 manufactured by Proface Corporation is used.

  Further, as shown in FIG. 2, an operation screen for changing the setting of the rotation speed of the motor 14 of the rubber extruder 12 can be displayed on the touch panel 26, and the operator operates the touch panel 26. It is possible to switch the high / low speed of the extrusion speed of the rubber strip G2 by the screw 16 and control the acceleration / deceleration time.

3. Next, a rubber strip manufacturing method using the rubber strip manufacturing apparatus according to the present embodiment configured as described above will be described.

  First, the width sensors 22a and 22b measure the width of the manufactured rubber strip G2 in real time and transmit it to the sequencer 24.

  When the width sensors 22a and 22b measure a dimension that deviates from the standard value, the sequencer 24 sends a stop signal to the control means to stop the extrusion.

  When the rubber extruder 12 is stopped, the operator resumes the extrusion operation by, for example, pressing and holding the “operation preparation” button on the operation panel of the rubber strip manufacturing apparatus for 3 seconds or more, and operates the touch panel 26, The width data of the rubber strip G2 for 5 minutes after the restart is graphed and displayed on the touch panel 26 as shown in FIG.

  Specifically, the width data received by the sequencer 24 is saved for 5 minutes after restarting, created as time-series width data for 5 minutes, and this is graphed and displayed on the touch panel 26.

  Then, based on the time-series width data of the rubber strip G2 displayed on the touch panel 26, the operator controls the acceleration / deceleration time and the like so as to adjust the width of the rubber strip G2 within the standard value.

  In the present embodiment, the acceleration / deceleration time and the like are controlled while confirming the degree of change in the width of the rubber strip G2 based on the time-series width data of the rubber strip G2 that is continuously displayed immediately after the restart. Therefore, compared with the conventional device that controls the acceleration / deceleration time based only on the current measurement result that changes in real time, the width of the rubber strip G2 can be managed to be constant by reducing the number of trials and errors. Adjustment of acceleration / deceleration time and the like can be performed in a short time.

  In the present embodiment, the time series width data of the rubber strip G2 can be confirmed on the touch panel 26 without the operator following the manufactured rubber strip G2 as in the prior art. .

  As described above, according to the rubber strip manufacturing apparatus according to the present embodiment, it is easy to manufacture the rubber strip G2 while keeping the width of the rubber strip G2 constant, and the adjustment work for keeping the width of the rubber strip G2 constant. Time can be significantly reduced. Specifically, the adjustment work time can be shortened to 1/5 compared with the conventional rubber strip manufacturing apparatus.

  In the above description, the adjustment of the width of the rubber strip in the restart after stopping the extrusion of the rubber strip has been described, but the present invention is not limited to this. For example, as described above, the extrusion speed can be adjusted by switching the high speed / low speed of the motor 14, but the width of the rubber strip G2 becomes unstable even when the high speed / low speed of the motor is switched. Therefore, the sequencer 24 is configured so that the width sensors 22a and 22b can automatically operate for 5 minutes to measure the width of the rubber strip G2 even when the extrusion speed is switched. As a result, the acceleration / deceleration time and the like can be adjusted in a short time by quickly responding to speed switching when the width of the rubber strip G2 becomes unstable.

  Note that the sequencer 24 is preferably configured to transfer and save the saved time-series width data to an external storage device such as a USB memory. For example, when the time-series width data shown in FIG. 2 is transferred to and stored in an external storage device, it is converted into a table format as shown in Table 1 below and stored.

  In this way, by converting the time-series width data into a tabular format and storing it in an external storage device, you can manufacture prototypes and rubber strips with new dimensions, or restart manufacturing that has been stopped for a long time. In this case, the stored tabular data can be used at the change point of the rubber strip manufacturing, and the quality of the rubber strip after the manufacturing can be appropriately managed.

  Thereafter, the manufactured rubber strip G2 is conveyed to a molding drum. FIG. 3 is a front view showing a state where a rubber strip is wound around a forming drum. As shown in FIG. 3, the rubber strip G <b> 2 manufactured as described above is conveyed to the molding drum 28 and is wound around the outer peripheral surface of the molding drum 28 while shifting the phase, thereby being molded as a tire rubber member. .

  At this time, as described above, by using the rubber strip manufacturing apparatus according to the present embodiment, the rubber strip G2 having a constant width is manufactured, so that the rubber strip G2 is neatly arranged on the outer peripheral surface of the molding drum. It is wound and a stable quality rubber member for a tire can be formed.

  In the above description, the width sensors 22a and 22b measure the dimensions that deviate from the standard values, and the explanation is given by taking as an example the case of restarting the extrusion after stopping the rubber extrusion or the switching of the extrusion speed. It is not limited to this. For example, the width of the rubber strip G2 can be adjusted in a short time by adjusting the acceleration / deceleration time based on the time-series width data of the rubber strip G2 even immediately after the start of the production of the rubber strip G2.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to said embodiment. Various modifications can be made to the above-described embodiment within the same and equivalent scope as the present invention.

10, 100 Rubber strip manufacturing device 12, 102 Rubber extruder 13, Opening 14, 104 Motor 16, 106 Screw 18, 108 Discharge port 20a, 20b, 110a, 110b Calendar roll 22a, 22b, 112a, 112b Width sensor 24 Sequencer 26 Touch Panel 28 Molding Drum G1 Sheet-like Rubber Material G2 Rubber Strip

Claims (2)

A rubber strip manufacturing apparatus comprising: a rubber extruder that continuously extrudes rubber from a discharge port; and a calendar roll that forms a rubber strip by rolling the rubber extruded from the discharge port,
A width sensor disposed downstream of the calendar roll and measuring the width of the rubber strip in real time;
A sequencer for transmitting a stop signal for stopping the extrusion from the rubber extruder when the width of the rubber strip measured by the width sensor deviates from a predetermined standard value;
The sequencer is configured to store the width of the rubber strip at a predetermined time measured by the width sensor as time series data,
The rubber strip manufacturing apparatus further comprises display means for displaying time series data of the width of the rubber strip stored in the sequencer. A rubber strip manufacturing method using the rubber strip manufacturing apparatus according to claim 1,
A rubber strip manufacturing method, wherein the rubber strip is manufactured by adjusting the width of the rubber strip based on time-series data of the width of the rubber strip displayed on the display means.

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