JP5982093B2 - Manufacturing apparatus and manufacturing method for molded product comprising belt member - Google Patents

Description

  The present invention relates to a manufacturing apparatus and a manufacturing method of a molded article including a belt member, and in particular, in a manufacturing apparatus of a rubber product such as a tire, when the belt member for one tire is attached to a molding drum, the belt member The present invention relates to a manufacturing apparatus and a manufacturing method for a molded article made of a belt member that automatically corrects the sticking start position and the width (sticking width) of the belt member.

When a molded product is manufactured by attaching a belt member such as a tire constituent member to a forming drum, a belt attaching start position and an attaching width to the forming drum are set. However, once set, due to various factors that change over time, the belt member sticking start position may deviate from the target value, or the width when the belt member is stuck to the forming drum may deviate from the reference dimension. Can happen.
When such a situation occurs, the belt member may become stuck abnormally, causing problems such as frequent stoppage of the apparatus or occurrence of defective products resulting in scrap. In addition, if the start position of the belt member sticking to the forming drum varies, it may cause variations in the uniformity of the product tires.

  Therefore, when the belt member sticking start position is moved along the axis of the forming drum in accordance with the amount of deviation (off-center) from the set position, or when the belt member is cut, the feed amount of the belt member The width of the belt to be attached on the forming drum is adjusted by adjusting the length of the belt member in the tire width direction.

When this adjustment is performed, conventionally, for example, based on the belt width measurement result or the belt center position measurement result at the sticking start position and the belt width reference value or the sticking start reference position, parameters specific to the device (belt member correction) After that, the correction amount is manually input, and the belt sticking server or the belt conveying device is automatically moved to adjust the deviation.
However, the input of the correction amount is complicated, and when such a manual operation is added, productivity is lowered and problems such as an input error may occur.

Note that the end position or center position of the annular member formed by winding on the forming drum is measured with a sensor, and the inspection result is reflected in the operation control in the next process. There is known a radial tire molding device that calculates a bias direction and corrects an engagement position between a conveying device that grips the annular member and a molding drum based on the calculation result (see Patent Document 1).
However, the present invention is not only different in control target from the present invention, but also has a correction amount calculation logic different from the logic of the present invention described later.

JP-A-9-131805

  The present invention has been made in view of the above-described problem in manufacturing a molded product by attaching a belt member to a forming drum, and after the belt member is misaligned at the attachment start position of the belt member or after the attachment is completed. When correcting the deviation of the belt width from the reference value, it is possible to perform an optimal correction without requiring manual work.

The present invention is an apparatus for manufacturing a molded article comprising a belt member by affixing the belt member to a forming drum in a spiral shape, the cutting means for cutting the belt member to a predetermined length, and the belt member cutting apparatus. A belt conveying mechanism for feeding the cut belt member to the forming drum, a belt member attaching means for attaching the belt member cut to a predetermined length to the rotating forming drum, and the attaching means for rotating the forming drum. A driving mechanism for moving in the axial direction, a means for measuring a starting position of application of the belt member to the forming drum by the attaching means, and an attaching width in the rotation axis direction of the forming drum when the belt member is attached to the forming drum Calculating the amount of deviation between the measured pasting start position and a predetermined pasting start reference position, and the drive necessary to eliminate the amount of deviation An adjustment amount for drive control of the structure, and a deviation amount between the measured belt member pasting width and a preset reference belt pasting width of the belt member are calculated, and the amount necessary for eliminating the misalignment amount A calculation unit that calculates an adjustment amount for conveyance control of the belt conveyance mechanism; and a drive control unit that controls the drive mechanism and the belt conveyance mechanism based on the adjustment amounts, and drives the belt conveyance mechanism. Control, adjust the cutting position of the belt member to adjust the width of the belt member in the rotation axis direction of the forming drum, and the calculating means is configured to adjust the belt width deviation from the calculated belt width reference value. The belt width adjustment amount is calculated by adding all the correction amounts calculated from the initial calculation of the correction amount for each part size to be produced to immediately before the calculation of the current correction amount to the correction amount multiplied by the specified specific gravity. Calculate First, the first calculation of the correction amount for each size of the produced product with respect to the correction amount obtained by multiplying the obtained deviation amount from the reference position at the pasting start position by a predetermined specific gravity according to the deviation amount. To a correction amount of the pasting start position by adding all of the correction amounts calculated immediately before the calculation of the current correction amount .
The present invention relates to a manufacturing method for manufacturing a molded article made of a belt member by affixing the belt member to a forming drum in a spiral shape, the cutting step for cutting the belt member into a predetermined length, and cutting the belt member A belt conveying step of feeding the belt member after being cut to the forming drum to the apparatus, a belt member attaching step of attaching the belt member cut to a predetermined length to the forming drum rotated by the attaching means, and an attaching means; A drive mechanism for moving in the direction of the rotation axis of the forming drum; a step of measuring a position where the belt member is attached to the forming drum by the attaching means; and a rotation axis of the forming drum when the belt member is attached to the forming drum. To calculate the amount of deviation between the step of measuring the pasting width in the direction and the measured pasting start position and a predetermined pasting start reference position, and to eliminate the amount of deviation The necessary adjustment amount for drive control of the drive mechanism and the amount of deviation between the measured belt member pasting width and a preset reference belt pasting width of the belt member are calculated to eliminate the amount of misalignment. A calculation step for calculating an adjustment amount for conveyance control of the belt conveyance mechanism necessary for the belt, and a drive control step for controlling the drive mechanism and the belt conveyance mechanism based on each adjustment amount, and the belt The conveyance mechanism is driven and controlled to adjust the cutting position of the belt member to adjust the width of the belt member in the rotation axis direction of the forming drum. In the calculation step, the belt width deviation from the calculated belt width reference value is adjusted. The belt is obtained by adding all the correction amounts calculated from the first calculation of the correction amount for each part size to be produced to immediately before the calculation of the current correction amount to the correction amount obtained by multiplying the amount by a predetermined specific gravity. Width A correction for each molded product size to be produced with respect to a correction amount obtained by multiplying the deviation amount from the reference position at the obtained sticking start position by a predetermined specific gravity according to the deviation amount while calculating an adjustment amount A method for producing a molded article comprising a belt member, wherein the adjustment amount of the pasting start position is calculated by adding all the correction amounts calculated from the initial calculation of the amount to immediately before the calculation of the current correction amount It is.

  According to the present invention, since the adjustment at the time of attaching the belt member to the forming drum can be automatically performed, the productivity can be improved as compared with the conventional adjustment process that requires manual work. In addition, the adjustment amount is a value obtained by adding specific gravity to the obtained deviation amount and adding it to the integrated value of the previous adjustment amount, thereby enabling a gradual adjustment and improving the follow-up performance of the entire device. It is possible to perform more accurate adjustment (feedback control).

It is a top view which shows roughly the whole apparatus which affixes a belt member on a forming drum, adjusting a belt width and the off center of a belt member. It is a figure which shows the structure of a control part roughly. It is a figure for demonstrating the calculation logic of the correction amount of the belt width performed in a control part. An image when the adjustment amount is calculated and feedback control is automatically performed is shown.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view schematically showing an entire apparatus for manufacturing a green tire by attaching a belt member made of a rubber material to a forming drum as an apparatus for manufacturing a molded product by attaching a belt member to a forming drum. .
The green tire manufacturing apparatus includes a forming drum unit 10 including a forming drum 12 and a base 14 having a drive mechanism for rotationally driving the forming drum 12, and a belt member for attaching a belt member having a predetermined width to the forming drum 12. And the pasting server 20.

  The belt member sticking server 20 has a predetermined dimension (a length at which a predetermined tire width is obtained when the long belt member is attached to the forming drum 12 by the cutter 30 and the conveying mechanism 22, that is, a length corresponding to the tire width). Then, the belt member cut into two is pressed and pasted onto the rotating forming drum 12 which is conveyed to the forming drum 12 and rotated.

  The drive mechanism of the belt member sticking server 20 is configured to be movable, for example, by a lead screw transmission mechanism driven by a stepping motor, and based on a correction amount from a control unit 40 (FIG. 2) described later, The stepping motor can be driven at a predetermined angle by the control of the control unit (referred to as the drive control unit 1) to move in the rotation axis direction (arrow Y direction) of the forming drum 12.

  The cutter 30 cuts the belt member supplied from the belt member sticking server 20. The transport mechanism 22 is composed of an appropriate mechanism such as a conveyor having an air suction function, for example. In order to adjust the belt member to be cut to a length corresponding to the tire width, a correction from a control unit 40 (FIG. 2) described later is performed. Based on the amount, the stepping motor is driven at a predetermined angle by the control of the drive mechanism control unit (referred to as drive control unit 2), and the belt member is moved back and forth in the supply direction (arrow X direction) on the belt member sticking server 20 Is possible.

  Here, the cutter 30 includes, for example, a cylinder 32 and its piston 34 and a cutting blade (not shown) attached to the piston 34, and when a tip detection sensor (not shown) detects the tip of the belt member, The belt member conveyed by driving the piston 34 is cut obliquely along the direction of the reinforcing cord.

  In the belt member affixing operation, the position of the belt member is adjusted by a conveyance mechanism (belt conveyance mechanism) 22, cut into a predetermined size by a cutter 30, and then conveyed to the vicinity of the forming drum 12 by the conveyance mechanism 22. Then, the pasting is started on the rotating molding drum 12, the pasted belt member is pressed by an appropriate pressing means such as a pasting roller, and the molding drum unit 10 is moved along the rail 16 in that state. Then, it is pasted on the forming drum 12 in a spiral shape.

FIG. 2 is a diagram schematically showing a configuration of a control unit for performing position control of the belt member described below.
The control unit 40 calculates an offset value (displacement amount) from the reference start position of the center of the belt member (center position in the width direction) at the start position of application to the forming drum 12 from the measurement value by the belt shape measurement sensor, and It has a function of calculating (acquiring) a deviation amount of the belt member pasting width from the reference belt width, and further calculating a correction amount corresponding to each deviation amount. It should be noted that both the sticking start reference position on the forming drum 12 and the reference belt width of the belt member are predetermined according to the tire to be formed.
The control unit 40 includes a CPU (Central Processing Unit) 41, a RAM (Random Access Memory) 42 that is a memory for operating the CPU, and a ROM (Read
only Memory) 43, an I / F (interface) unit 44 for inputting / outputting data, and the operation processing results in the CPU 41 are stored, so that an external memory 45 provided as necessary and operations such as input are performed. An operation unit 46 for performing, for example, a display unit 47 such as an LCD (liquid crystal display unit) for displaying measurement results, calculation results, and the like of the belt shape measurement sensor is provided.

  Based on the measurement information of the belt member input from the belt shape sensor, the control unit 40 applies the offset start position of the belt member to the forming drum 12, that is, the offset of the belt member from the reference start position of the center in the width direction, for example. , And calculating a deviation amount of the affixing belt width from the reference belt width in a state of being affixed on the forming drum 12, and for correcting the positions of the affixing server 20 and the transport mechanism 22 by the stepping motor based on the result Calculate the correction amount. Then, the calculation result is transmitted to the drive control unit 1 and the drive control unit 2 through the interface unit 44 to control the operation of each drive mechanism, thereby correcting the positions of the sticking server 20 and the transport mechanism 22.

Next, position correction of the sticking server 20 and the transport mechanism 22 will be described.
(1) Adjustment of belt member sticking start position The belt member sticking start position is adjusted by measuring the center of the belt member at the sticking start position with a shape measuring sensor, and the CPU 41 of the control unit 40 determines in advance based on the measured value. The amount of deviation from the set reference position, that is, the amount of deviation (offset value) is calculated, the specific gravity described later is added to the amount of deviation, and the correction amount immediately before (feedback control), that is, the amount of deviation. The correction amount is obtained by adding to the integrated value immediately before the amount and the specific gravity. The obtained correction amount is sent to the drive control unit 1 of the drive mechanism of the belt member sticking server 20 to control the rotation of the stepping motor, and the sticking server 20 is displaced along the rotational axis of the forming drum 12. Move in the direction of elimination by the amount of rotation of the motor.

(2) Adjusting the belt width The belt width is adjusted by measuring the pasting width with a belt shape measuring sensor after the belt member is pasted on the forming drum 12, and the CPU 41 of the controller 40 based on the measured width. A deviation from a predetermined width (reference belt width) is calculated, a belt width correction amount is calculated from the deviation amount in the same manner as the belt member offset amount correction, and the obtained correction amount is calculated. By transmitting to the drive control unit 2 of the drive mechanism of the sticking server 20, the stepping motor is controlled to rotate, and the belt member is moved by the rotation of the stepping motor in the direction to eliminate the deviation. For example, when the measured belt width is less than the reference width, the belt member is moved in the transport direction and cut by the cutter 30 to increase the belt length in the tire width direction and correct the belt width.
In addition, when correction is performed, the belt member sticking start position (and hence the position of the sticking server 20) is simultaneously rotated to prevent the center position of the belt member attached to the forming drum 12 from changing. It is necessary to move along the axis by ½ of the correction amount.

Next, the calculation logic of the belt width correction amount executed by the control unit 40 will be described.
When the belt width correction amount is obtained, if the correction is performed as it is according to the deviation amount calculated by the CPU 41, the correction amount may fluctuate greatly. Therefore, in the present embodiment, correction is performed gradually, and a specific gravity is given to the deviation amount so that the entire apparatus can follow the target value satisfactorily. A method of adding a correction amount at the time of feedback control is employed.

FIG. 3 shows a procedure for obtaining the correction amount by adding the current correction amount and the belt width correction amount of the immediately preceding tire to the belt width reference value (process value) set for each type of forming drum. ing.
That is, here, a specific gravity (weight) r of less than 1 is attached to the deviation amount α from the reference value calculated based on the belt width measured by the belt shape measuring sensor. That is, the CPU 41 of the control unit 40 calculates the correction amount with respect to the obtained deviation amount α by the deviation amount α × specific gravity r, and corrects the correction amount by adding the belt width correction amount β obtained immediately before. Find the amount.
Here, the belt width correction amount β is an accumulated value of a correction amount immediately before the current correction amount, that is, a belt width correction amount calculated in the past (= deviation amount α × specific gravity r),
β = α1r1 + α2r2 +... αn-1rn-1 .
Therefore, the belt width correction amount R for use in correction of performing this becomes R = αr + β.

Here, the specific gravity r is a numerical value less than 1 set for each type of the forming drum unit so that the belt width correction amount calculated based on the past data for each belt width deviation amount becomes an optimum value. For example, the specific gravity is set so as to increase as the amount of deviation increases corresponding to the amount of deviation in millimeters.
As described above, the correction amount obtained in this way is transmitted to, for example, the drive control unit 2 of the transport mechanism 22 via the I / F unit 44, thereby controlling the rotation angle of the stepping motor. The mechanism 22 moves the belt member back and forth in the supply direction to change the cutting position (the length corresponding to the tire width), thereby adjusting the width of the belt member (the width of application to the forming drum).

The above explanation is about the adjustment of the width of the belt member, but the same logic is applied to perform the calculation in the offset correction of the center at the belt member sticking start position.
That is, the belt member is shifted from the reference position at the sticking start position of the forming drum 12 (here, the center thereof), that is, based on the offset amount, the correction amount is given a specific gravity to be an adjustment amount, and this is the immediately preceding adjustment amount. The operation to be added to is performed.
In other words, the offset correction amount θ at the center of the belt member is a cumulative value of accumulated values of deviation amount γ × specific gravity s calculated in the past,
θ = γ1s1 + γ2s2 +... + γn−1sn−1 .
Therefore, the belt width correction theta used for correction to perform this becomes Θ = γs + θ.
Here, the specific gravity s is less than 1, which is set from the past data so that the belt member correction amount becomes the optimum value of the belt member position correction amount for each deviation (offset) amount from the reference position of the belt member. In this case as well, for example, the specific gravity is set to increase as the amount of deviation increases, corresponding to the amount of deviation in millimeters.

FIG. 4 shows an image when the adjustment amount is calculated as described above and feedback control is automatically performed in the actual work process.
In the present embodiment, the forming drum units 10 (1), 10 (2), etc., comprising the forming drum 12 and the base 14 of the forming drum 12 are attached to the sticking server 20 with diamond components, for example, carcass. It moves (circulates) sequentially in the state.
Therefore, the control unit 40 sets the correction amount based on the amount of deviation from the reference center position of the center position and the amount of deviation from the standard value of the belt member pasting width performed when the belt member is pasted by the pasting server 20. Based on the amount of correction, the necessary position correction is performed before the next forming drum unit moves.

Therefore, the next belt is applied at the corrected positions of the corrected application server 20 and transport mechanism 22. At the same time, measurement is performed by the belt shape measuring sensor, and if there is a positional deviation at the sticking start position and a deviation from the reference belt width of the belt member, the correction amount is calculated, and the current molding drum unit 10 (1) is molded. After the belt member is attached to the drum 12, the positions of the application server 20 and the transport mechanism 22 are corrected before the next forming drum unit 10 (2) moves.
By repeating such processing, the position of the sticking server 20 and the position of the transport mechanism 22 can be automatically maintained in a constantly corrected state, and the belt member is stuck to the forming drum 12 at that position. Is called. Therefore, not only the belt attaching position is automatically adjusted, but also the accuracy of the belt member attaching position is improved.

The correction amount is preferably cleared automatically at the timing when the produced tire size is switched. Thereby, the remaining correction amount data does not adversely affect the correction in the molding drum units having different sizes.
According to the present embodiment, the correction amount is added based on the previous correction amount, that is, the sum of the deviation amount with a specific gravity, and the correction amount obtained by adding the specific gravity to the current deviation amount is added to the correction amount. Since the correction amount is set so that there is no sudden fluctuation in the correction amount and gradually approaches the target value, the device is not subjected to a sudden load, and the belt member sticking start position and width are corrected. Can be carried out smoothly and accurately.
Therefore, there is no risk of variations in shape or uniformity defects in the manufactured product.

  DESCRIPTION OF SYMBOLS 10 ... Molding drum unit, 12 ... Molding drum, 14 ... Base, 16 ... Rail, 20 ... Pasting server, 22 ... Conveyance mechanism, 30 ... Cutter, 32 ... Cylinder, 34 ... piston, 40 ... control unit, 41 ... CPU, 42 ... RAM, 43 ... ROM, 44 ... I / F (interface) unit, 45 ... External memory, 46... Operation unit, 47.

Claims (4)

An apparatus for manufacturing a molded product comprising a belt member by affixing a belt member to a molding drum in a spiral shape,
Cutting means for cutting the belt member into a predetermined length;
A belt conveying mechanism that supplies the belt member to a cutting device and conveys the cut belt member to a forming drum;
A belt member attaching means for attaching the belt member cut to a predetermined length to a rotating molding drum;
A drive mechanism for moving the attaching means in the direction of the rotation axis of the forming drum;
Means for measuring the start position of application of the belt member to the forming drum by the application means;
Means for measuring a pasting width in a rotation axis direction of the molding drum when the belt member is pasted on the molding drum;
An amount of deviation between the measured sticking start position and a predetermined sticking start reference position is calculated, an adjustment amount for driving control of the drive mechanism necessary to eliminate the gap amount, and the measured belt Calculation means for calculating a deviation amount between a member application width and a preset reference belt application width of the belt member, and calculating an adjustment amount for conveyance control of the belt conveyance mechanism necessary to eliminate the deviation amount. When,
Drive control means for controlling the drive mechanism and the belt transport mechanism based on the respective adjustment amounts;
Driving and controlling the belt conveyance mechanism, adjusting the cutting position of the belt member to adjust the width of the belt member in the rotation axis direction of the forming drum,
The calculation means calculates a correction amount obtained by multiplying a correction amount obtained by multiplying a belt width deviation amount from the calculated belt width reference value by a predetermined specific gravity, from a first calculation of a correction amount for each size of a produced product, and a current correction amount. The belt width adjustment amount is calculated by adding all the correction amounts calculated immediately before the calculation, and a predetermined amount corresponding to the deviation amount from the reference position at the obtained sticking start position is calculated. The correction amount multiplied by the specific gravity is added with all the correction amounts calculated from the first calculation of the correction amount for each part size to be produced to immediately before the calculation of the current correction amount, An apparatus for manufacturing a molded article comprising a belt member, wherein the adjustment amount is calculated. In the manufacturing apparatus of the molded article which consists of a belt member according to claim 1,
The specific gravity is preset for each size of the forming drum, and is a numerical value less than 1 corresponding to the amount of deviation. A manufacturing method for manufacturing a molded article comprising a belt member by affixing a belt member to a forming drum in a spiral shape,
A cutting step of cutting the belt member into a predetermined length;
A belt conveying step of supplying the belt member to a cutting device and conveying the cut belt member to a forming drum;
A belt member attaching step for attaching the belt member cut to a predetermined length to a forming drum that is rotated by an attaching means;
A drive mechanism for moving the attaching means in the direction of the rotation axis of the forming drum;
Measuring a sticking start position of the belt member on the forming drum by the sticking means;
Measuring the pasting width in the direction of the rotation axis of the molding drum when the belt member is pasted on the molding drum;
An amount of deviation between the measured sticking start position and a predetermined sticking start reference position is calculated, an adjustment amount for driving control of the drive mechanism necessary to eliminate the gap amount, and the measured belt A calculation step of calculating a deviation amount between a member affixing width and a preset reference belt affixing width of the belt member, and calculating an adjustment amount for the conveyance control of the belt conveyance mechanism necessary for eliminating the deviation amount. When,
A drive control step of controlling the drive mechanism and the belt transport mechanism based on the adjustment amounts,
Driving and controlling the belt conveyance mechanism, adjusting the cutting position of the belt member to adjust the width of the belt member in the rotation axis direction of the forming drum,
In the calculation step, the correction amount obtained by multiplying the correction amount obtained by multiplying the belt width deviation amount from the calculated belt width reference value by a predetermined specific gravity from the first calculation of the correction amount for each size of the produced product, The belt width adjustment amount is calculated by adding all the correction amounts calculated immediately before the calculation, and a predetermined amount corresponding to the deviation amount from the reference position at the obtained sticking start position is calculated. The correction amount multiplied by the specific gravity is added with all the correction amounts calculated from the first calculation of the correction amount for each part size to be produced to immediately before the calculation of the current correction amount, A method for producing a molded article comprising a belt member, wherein an adjustment amount is calculated. In the manufacturing method of the molded article which consists of a belt member according to claim 3,
The specific gravity is a numerical value less than 1 corresponding to the magnitude of the deviation amount. A method for producing a molded article comprising a belt member.

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