JPH10202725A - Equipment of manufacturing strip rubber material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly bring the width of this strip rubber material near to its set point and improve its quality on the basis of the difference between the measured width of the strip rubber material extruded from extruders and its set point and the variation of the difference per unit time. SOLUTION: By widthwise shifting respective strip rubber materials A and B extruded from respective extruders 1 with the driving mechanism 3c of a movable guide 3a, the guided width of the rubber material is changed. Further, a first material width measuring device 4 measures the single body widths of the respective strip rubber materials A and B, while a second material width measuring device 5 measures the total width of the respective strip rubber materials A and B, which are overlapped with each other by means of a guide mechanism 3. After that, a first and a second controlling parts connected with the respective extruders 1 and the first material width measuring device 4 control respectively the material extruding speeds of the respective extruders 1 and the material guide width of the guide mechanism 3 on the basis of the difference between the measured widths of the respective strip rubber materials A and B and the set point of the strip rubber material and the variation of the difference per unit time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a belt-shaped rubber material used as a material for a tire, for example.

[0002]

2. Description of the Related Art Conventionally, as described in, for example, Japanese Patent Application Laid-Open No. Hei 4-27518, in the production of a belt-shaped rubber material used as a tire material, a belt-shaped rubber material having a predetermined cross-sectional shape is extruded from an extruder onto a conveyor. In addition, an extrusion method is known in which the width of the extruded belt-shaped rubber material is measured by an image sensor or the like, and the material extrusion speed of an extruder is controlled so that the measured width approaches a predetermined target value. That is, when the measurement width of the belt-shaped rubber material is smaller than the target value, the material extrusion speed of the extruder is increased, and when the measurement width is larger than the target value, the material extrusion speed of the extruder is decreased, so that the belt-shaped rubber material is extruded. The width of the material approaches the target value.

[0003]

However, in the method in which the material extrusion speed of the extruder is simply increased or decreased according to the measurement width, the fluctuation of the extrusion speed becomes largely unstable, and the width of the belt-like rubber material is quickly set to the target. There was a problem that the value could not be approached.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an apparatus for manufacturing a belt-like rubber material capable of quickly approaching a width of the belt-like rubber material to a target value. It is in.

[0005]

In order to achieve the above object, according to the present invention, an extruder for extruding a band-shaped rubber material having a predetermined cross-sectional shape and a belt-shaped rubber material extruded from the extruder in an extrusion direction. In the apparatus for manufacturing a band-shaped rubber material provided with conveying means for conveying at a predetermined speed, a material width measuring means for measuring a width of the band-shaped rubber material extruded from the extruder, and a measuring width of the material width measuring means. Control means is provided for controlling the material extrusion speed of the extruder based on the difference from the target value and the amount of change per unit time so that the measurement width of the material width measurement means approaches the target value. Thereby, the material extrusion speed of the extruder is controlled based on the difference between the measurement width of the belt-shaped rubber material and the target value and the amount of change per unit time, so that the increase and decrease of the material extrusion speed are stabilized in a short time. .

According to a second aspect of the present invention, in the apparatus for manufacturing a band-shaped rubber material according to the first aspect, when the width of the band-shaped rubber material does not exceed a predetermined allowable range within a predetermined time or a predetermined number of measurements, the material is extruded. There is provided storage means for storing data relating to the speed as the next initialization data. Thereby, in addition to the effect of claim 1, since the data relating to the material extrusion speed when the width of the belt-shaped rubber material is stabilized for a predetermined time or a predetermined number of times becomes the next initial setting data, the optimum initial setting is always obtained. Done.

According to a third aspect of the present invention, there is provided a belt comprising a conveying means for conveying a plurality of belt-shaped rubber materials at a predetermined speed, and a guide means for guiding each of the belt-shaped rubber materials in the width direction such that at least a part of the rubber materials overlaps with each other. In the rubber material manufacturing apparatus, a material width measuring means for measuring the entire width of each belt-shaped rubber material superimposed on each other by the guide means, a difference between a measured width of the material width measuring means and a target value and a difference per unit time thereof. Control means is provided for controlling the material guide width of the guide means such that the measured width of the material width measurement means approaches the target value based on the amount of change. As a result, the material guide width of the guide means is controlled based on the difference between the measured width of each band-shaped rubber material and the target value and the amount of change per unit time, so that the increase and decrease of the material guide width is stable in a short time. I do.

According to a fourth aspect of the present invention, in the apparatus for manufacturing a belt-shaped rubber material according to the third aspect, when the entire width of each of the belt-shaped rubber materials does not exceed a predetermined allowable range during a predetermined time or a predetermined number of measurements, There is provided storage means for storing data relating to the material guide width as the next initialization data. Thus, in addition to the operation of claim 3, since the data relating to the material guide width when the width of each belt-shaped rubber material is stabilized for a predetermined time or a predetermined number of times of measurement becomes the next initial setting data, the optimum initial setting is always obtained. Is performed.

[0009]

1 to 8 show an embodiment of the present invention. FIG. 1 is a plan view of an apparatus for producing a belt-shaped rubber material, and FIG. 2 is a view taken along the line XX in FIG. FIG. 3 and FIG.
FIG. 4 is a block diagram showing a control system of the material extrusion speed, and FIG. 5 is a block diagram showing a control system of the material guide width.

The apparatus for manufacturing a band-shaped rubber material according to the present embodiment comprises a plurality of extruders 1 for extruding a band-shaped rubber material having a predetermined cross-sectional shape, a conveyor 2 for conveying each band-shaped rubber material, and each belt-shaped rubber material. A guide mechanism 3 for guiding the parts to overlap, a first material width measuring device 4 for measuring the unit width of the band-shaped rubber material extruded from each extruder 1, and each band-shaped rubber material superimposed by the guide mechanism 3 A second material width measuring device 5 for measuring the overall width of the material, a first controller 6 for controlling the material extrusion speed of each extruder 1 based on the measurement result of the first material width measuring device 4, And a second controller 7 for controlling the material guide width of the guide mechanism 3 based on the measurement result of the second material width measuring device 5.

Each extruder 1 is connected to a material supply source (not shown), and extrudes belt-shaped rubber materials A and B having a predetermined cross-sectional shape from an extrusion port provided in an extrusion head 1a by a driving means such as a motor. I have.

The conveyor 2 receives each of the rubber band materials A and B extruded from each of the extruders 1, and receives each of the rubber band materials A and B.
At a constant speed in the extrusion direction.

The guide mechanism 3 includes a movable guide 3a disposed at one end in the width direction of each of the band-shaped rubber materials A and B, and a fixed guide 3 disposed at the other end in the width direction of each of the band-shaped rubber materials A and B.
The guide width of each band-shaped rubber material A, B is changed by moving the movable guide 3a in the width direction of each band-shaped rubber material A, B by the drive mechanism 3c.

The first material width measuring device 4 comprises a plurality of image sensors 4a for detecting the side portions of each of the band-shaped rubber materials A and B as images, and the single width of each of the band-shaped rubber materials A and B is determined by each of the image sensors 4a. Are respectively measured.

The second material width measuring device 4 comprises a pair of image sensors 5a for detecting the side portions of each of the belt-shaped rubber materials A and B as an image, and the whole width of each of the belt-shaped rubber materials A and B is detected by each of the image sensors 5a. Is to be measured.

The first control section 6 comprises control means such as a microcomputer, and is connected to each extruder 1 and the first material width measuring device 4. The first control unit 6 controls the material extrusion speed of each extruder 1 based on the difference between the measured width of each of the belt-shaped rubber materials A and B and the target value and the amount of change per unit time. . Further, the first control unit 6 includes a data storage unit 6a that stores data relating to the material extrusion speed.
It has.

The second control unit 7 comprises control means such as a microcomputer, and is connected to the guide mechanism 3 and the second material width measuring device 5. The second control section 7 controls the material guide width of the guide mechanism 3 based on the difference between the measured width of each of the belt-shaped rubber materials A and B and the target value and the amount of change per unit time. Further, the second control section 7 includes a data storage section 7a for storing data relating to the material guide width.

With the above construction, each of the belt-shaped rubber materials A and B extruded from each extruder 1 is conveyed by the conveyor 2 and partially overlapped by the guide mechanism 3 and then by a pressure device (not shown) or the like. Pasted.
At that time, the width of each of the belt-shaped rubber materials A and B extruded from each of the extruders 1 is measured by the first material width measuring device 4, and the first control unit 6 measures each of the belt-shaped rubber materials A and B. The material extrusion speed of each extruder 1 is controlled so that the width approaches the target value. The entire width of each of the belt-shaped rubber materials A and B superposed by the guide mechanism 3 is measured by the second material width measuring device 5, and the measured width of each of the belt-shaped rubber materials A and B is determined by the second control unit 7. The material guide width of the guide mechanism 3 is controlled so as to approach the target value.

Here, with reference to the flowchart shown in FIG. 6, the operation of the first control unit 6 is described with reference to one of the belt-like rubber materials A.
The case will be described. First, after the initial setting of the material extrusion speed based on the data stored in advance (S
1) The width of the belt-shaped rubber material A is measured by the first material width measuring device 4 (S2), and the measured width is set to W1 (S1).
3). Next, when the predetermined time t has elapsed (S4), the width of the belt-shaped rubber material A is measured by the first material width measuring device 4 (S5), and the measured width is set to W2 (S6). Here, the difference α (= W0−) between the measurement width W1 and the predetermined target value W0.
W1) and its variation β per unit time t (= W2 −
The material extrusion speed of the extruder 1 is corrected based on W1) (S7). That is, the first control unit 6 has correction amount data set in a plurality of stages with respect to the values of the difference α and the change amount β as shown in FIG. The material extruding speed is corrected by converting the corresponding correction amount data into the number of rotations of the motor of the extruder 1 or the like. For example,
When the difference α is −1 step (the measurement width is smaller than the target value) and the variation β is +1 step (the measurement width is increased), the correction amount is −1.
And After the correction, the latest measurement width is set to W1 (S8). Here, if the width of the belt-shaped rubber material A becomes stable, for example, when the measurement width W2 does not exceed a predetermined allowable range during a predetermined time or a predetermined number of measurements (S
9) The data on the material extrusion speed at that time is stored in the data storage unit 6a as the next initial setting data (S1).
0), returning to step S3 and repeating the above operation. still,
The same control as described above is performed for the other belt-shaped rubber material B.

Next, the operation of the second control unit 7 will be described with reference to the flowchart shown in FIG. First, after the initial setting of the material guide width based on the data stored in advance (S11), the entire width of each of the belt-shaped rubber materials A and B is measured by the second material width measuring device 5 (S12). The measurement width is set to W1 (S13). Next, when a predetermined time t has elapsed (S14), the entire width of the belt-shaped rubber materials A and B is measured by the second material width measuring device 5 (S15), and the measured width is set to W2 (S16). . Here, the material guide width of the guide mechanism 3 is corrected based on the difference α (= W0−W1) between the measured width W1 and the predetermined target value W0 and the variation β (= W2−W1) per unit time t. (S17). That is, similarly to the first control unit 1, the second control unit 7 has correction amount data set in a plurality of steps for the values of the difference α and the change amount β, and uses the difference α and the change amount based on the measurement result. The material guide width is corrected by converting the correction amount data corresponding to the amount β into the movement amount of the movable guide 3a of the guide mechanism 3. After the correction, the latest measurement width is set to W1 (S18). Here, if the entire width of the belt-shaped rubber materials A and B becomes stable, for example, when the measurement width W2 does not exceed a predetermined allowable range during a predetermined time or a predetermined number of measurements (S
19) The data relating to the material extrusion speed at that time is stored in the data storage unit 7a as the next initial setting data (S2).
0), returning to step S11 and repeating the above operation.

As described above, according to the present embodiment, the material extrusion speed and the material extrusion speed of each extruder 1 are determined based on the difference between the measured width of each of the belt-shaped rubber materials A and B and the target value and the amount of change per unit time. Since the material guide width of the guide mechanism 3 is controlled, the increase and decrease of the material extrusion speed and the material guide width can be stabilized in a short time, and the width of each of the belt-shaped rubber materials A and B can be quickly brought close to the target value. be able to. Further, since the data relating to the material extrusion speed and the material guide width when the width of each of the belt-shaped rubber materials A and B is stabilized for a certain period of time or a predetermined number of times of measurement is stored as the next initial setting data, the optimum initial value is always stored. Settings can be made.

[0022]

As described above, according to the first aspect, since the increase and decrease of the material extrusion speed can be stabilized in a short time, the width of the belt-like rubber material can be quickly brought close to the target value. Productivity and quality can be improved.

According to the second aspect, in addition to the effect of the first aspect, it is possible to always perform the optimal initial setting.
The material extrusion speed can be controlled more accurately.

According to the third aspect, since the increase and decrease of the material guide width can be stabilized in a short time, the width of each belt-shaped rubber material can be quickly brought close to the target value, and the productivity and quality can be improved. Improvement can be achieved.

According to the fourth aspect, in addition to the effect of the third aspect, it is possible to always perform the optimal initial setting.
The material guide width can be controlled more accurately.

[Brief description of the drawings]

FIG. 1 is a plan view of an apparatus for manufacturing a belt-shaped rubber material according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows XX in FIG. 1;

FIG. 3 is a view taken in the direction of the line YY in FIG. 1;

FIG. 4 is a block diagram showing a control system of a material extrusion speed.

FIG. 5 is a block diagram showing a control system of a material guide width.

FIG. 6 is a flowchart showing the operation of a first control unit.

FIG. 7 is a diagram showing correction amount data;

FIG. 8 is a flowchart showing the operation of a first control unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Extruder, 2 ... Conveyor, 3 ... Guide mechanism, 4 ... First
5, a second material width measuring instrument, 6: a first control section, 6a: a data storage section, 7: a second control section, 7a
... data storage unit, A, B ... belt-shaped rubber material.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29L 30:00

Claims (4)

[Claims] 1. An apparatus for producing a rubber band material, comprising: an extruder for extruding a rubber band material having a predetermined cross-sectional shape; and a conveying means for conveying the rubber band material extruded from the extruder at a predetermined speed in an extrusion direction. A material width measuring means for measuring a width of the belt-shaped rubber material extruded from the extruder; a material width measuring means based on a difference between a measured width of the material width measuring means and a target value and a variation per unit time thereof. An apparatus for controlling a material extrusion speed of an extruder so that a measurement width of the belt approaches a target value. 2. A storage means for storing data relating to the material extrusion speed as next time initial setting data when the width of the belt-shaped rubber material does not exceed a predetermined allowable range for a predetermined time or a predetermined number of measurements. The apparatus for producing a belt-shaped rubber material according to claim 1, wherein: 3. An apparatus for manufacturing a band-shaped rubber material, comprising: conveying means for conveying a plurality of band-shaped rubber materials at a predetermined speed; and guide means for guiding each of the band-shaped rubber materials in a width direction so that at least a part thereof overlaps each other. In the material width measuring means for measuring the overall width of each belt-like rubber material overlapped by the guide means, based on the difference between the measured width of the material width measuring means and the target value and the amount of change per unit time An apparatus for manufacturing a belt-shaped rubber material, comprising: control means for controlling a material guide width of a guide means so that a measurement width of the material width measurement means approaches a target value. 4. A storage means for storing data relating to the material guide width as the next initial setting data when the entire width of each band-shaped rubber material does not exceed a predetermined allowable range in a predetermined time or a predetermined number of measurements. The apparatus for producing a belt-shaped rubber material according to claim 3, wherein: