JPH05131480A - Controlling method of stock feeding to calender - Google Patents

Abstract

PURPOSE:To feed stock neither more nor less to respective calenders by a method wherein the feed of a stock feeding means and the position of a cutter are controlled so as to allow the stagnant amounts of stock at the respective calenders to coincide with the standard values at the feeding of the stock, which is delivered from the stock feeding means and cut apart with a feed controlling cutter. CONSTITUTION:At the outlet of an extruder 1, a feed controlling cutter, which moves horizontally along the outlet and, at the same time, bisects, for example, delivered stock (g), is arranged. The cut-apart stock (g) is fed with conveyors 3-1-3-3 to respective calenders 5 and 6. The amounts of bank of toe respective calenders 5 and 6 are measured with sensors 7. The measured values and pre-set standard values are compared with each other respectively with a sequencer. When the measured values do not coincide with the standard values, the controllings of the rotational speed of the extruder 1 and/or of the position of the cutter are instructed to a control panel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to stably supply a predetermined amount of raw material to each calendar when the raw material supplied from a single raw material supply means is distributed and supplied to a plurality of calendars. Therefore, it includes all those that cause rubber accumulation between rolls, such as a rubber calendar for rolling a rubber sheet and a squeegee calendar for coating squeegee rubber on ply cords.

[0002]

2. Description of the Related Art As a technique for controlling the supply amount for each control cycle by totally managing the supply amount of raw material discharged from a raw material supply means and the consumption amount of raw material consumed in a calendar Reference is made to the 26220 publication, etc.,
There has been no proposal at present regarding the technology of using a single supply means and supplying the raw materials supplied from each of them to each of a plurality of calenders arranged without excess or deficiency.

[0003]

[Problems to be Solved by the Invention]
In the process of coating the squeegee rubber on the jointed ply cords, the squeegee rubber is coated on both sides of the ply cord, so it is necessary to arrange the raw material supply means and the calender on each side of the ply cord, which is wasteful in terms of equipment. In many cases, simplification of equipment was desired. It is an object of the present invention to propose a raw material supply control method in which a single raw material supply means is used and the materials supplied from this can be accurately supplied to each calender without excess or deficiency.

[0004]

According to the present invention, a raw material discharged from a raw material supply means is divided into at least two parts by a supply amount adjusting cutter provided at an outlet side discharge port of the supply means, and the divided raw materials are individually separated. Upon feeding to each of the arranged calendars, the stagnation amount of the raw material in each calendar is measured by the sensor arranged in each of the above calendars,
A raw material supply control method in a calendar characterized by adjusting at least one of the raw material supply amount of the raw material supply means and the arrangement position of the cutter so that the measured stagnation amount matches a preset appropriate stagnation amount, The total supply amount of the raw material discharged from the discharge port of the raw material supply means is the variation of the standard appropriate amount due to the amount of raw material used that matches the structure and size of the member to be processed, the standard stagnation amount in the calendar and the disturbance during operation. The rotation speed of the raw material supply means is initialized based on this total supply amount, and the supply amount is adjusted so that the supply amount of the raw material to each calendar becomes a predetermined division ratio. Position the cutter.
Further, according to the present invention, the raw material discharged from the raw material supply means is divided into at least two parts by a supply amount adjusting cutter provided at a discharge port of the supply means, and the divided raw materials are fed to respective calendars individually arranged. In the process, when changing the supply amount of raw materials sent to each calendar,
While the rotation speed of each calendar is kept constant, the feed rate of the raw material in the raw material feeding means and / or the division ratio of the raw material by the cutter for adjusting the feed rate is changed, and when the changed area reaches each calendar, It is a method for supplying a raw material to a calendar, which is characterized in that the rotational speed is changed to a rotational speed suitable for the amount of raw material supplied.

FIG. 1 shows equipment suitable for carrying out the present invention. In the figure, reference numeral 1 denotes an extruder as a raw material supply means, and a discharge port 1a of the extruder 1 is provided with the extruder 1a. The cutter 2 for adjusting the supply amount is arranged so as to move to the left and right and to divide the raw material g discharged from the discharge port 1a into at least two. Also, 3-1 to 3-
Reference numeral 3 denotes a raw material supply conveyer for conveying the raw material discharged from the extruder 1 to each calendar, and 4 denotes a conveyer for conveying the ply cord P, for example. It is designed to be linked with the feeding speed of. Reference numerals 5 and 6 are canredders arranged with the ply cord P sandwiched therebetween,
Each of the rolls of each of the calenders 5 and 6 is equipped with a cutter (not shown) for cutting out the raw material attached around the roll, and the sheet S of the raw rubber cut out by this carter is used for the conveyor 4 They are arranged on the front and back surfaces of the ply cord P flowing above. Reference numeral 7 is a sensor (photoelectric tube or the like) for measuring the amount of material stagnant between rolls of the calenders 5 and 6 (hereinafter simply referred to as bank amount).

A control system of the equipment having the above-mentioned structure is shown in FIG. 2, and numeral 8 in the drawing is a central processing unit (CPU) in which all process conditions are stored according to the tire size to be manufactured, and 9 is set by the CPU 8. The sequencer 9 is provided with a tuning circuit 9a for changing the rotation speed of the extruder 1 in accordance with the rotation speeds of the calendars 5 and 6. Further, 10 is a calendar control panel for controlling the rotation speeds of the calendars 5 and 6 according to a command from the sequencer 9, 11 is a control panel for controlling the rotation speed of the extruder 1 according to a command from the sequencer 9, and 12 is from the sequencer 9. Is a positioning control panel that controls the position of the cutter 2 in accordance with the command.

The CPU 8 first determines the total amount of raw material rubber that is suitable for the structure and size of the member to be processed, and also determines the feed rate of the raw material to be supplied to each of the calendars 5 and 6, and the information is used by the sequencer. Send to 9. The information transmitted to the sequencer 9 passes through the control panel 10 for controlling the rotation speed of the calendar drive source 5a, the control panel 11 for controlling the rotation speed of the drive source 1a of the extruder 1, and the drive source C of the cutter 2. _It is transmitted to the control panel 12 which operates ₁ to position the cutter 2. Here, the rotational speeds of the respective calendars 5 and 6 and the respective driving sources of the extruder 1 are such that if one rotational speed (calendars 5 and 6) is determined, the other rotational speed (extruder 1) is automatically set to a predetermined value. Has been previously obtained by an experiment so that the calculation is performed by the tuning circuit 9a.
Done in.

During normal operation, the raw material g discharged from the extruder 1 is conveyed to the calenders 5 and 6 via the conveyors 3-1 to 3-3 and the sheet S fed from the calenders 5 is attached to the front and back surfaces of the ply cord P. Between the calenders 5 and 6 and the control panel 10 thereof and the extruder 1 and the control panel 11 thereof, the rotational speed of the calender roll and the rotational speed of the extruder 1 are detected by detectors (pulse generators, etc.) 10a and 11a. Then, feedback control is performed so as to always maintain the initially set rotational speed (the initial rotational speed is set by the calendar speed setting device u).

The sensor 7 measures the bank amount of each of the calendars 5 and 6, and the sequencer 9 compares whether the measured value is held in a preset standard bank amount, and the sensor is compared. When the bank amount in the calendars 5 and 6 does not match the preset standard bank amount as measured by 9, the rotation speed of the extruder 1 and / or the position of the cutter 2 should be adjusted so that it becomes an appropriate value. Commands are transmitted to each control panel to make adjustments. As an example of control based on the measurement result by the sensor 7, for example, when the bank amounts of the calendars 5 and 6 both exceed the standard bank amount, the rotation speed of the extruder 1 is reduced to reduce the supply amount of the raw material. Control
When only the bank amount of calendar 5 greatly exceeds the standard bank amount (Canreder 6 is kept at the standard bank amount)
Reduces the rotation speed of the extruder 1 according to a command from the sequencer 9 and at the same time adjusts the position of the cutter 2. If the bank amount of either one of the calendars 5 and 6 greatly exceeds the standard bank amount and the bank amount of the other calendar is less than the standard bank amount, the cutter 2
If the amount of bank is less than the standard amount of bank, the rotation speed of the drive source 1a of the extruder 1 is increased to increase the amount of raw material supplied. In controlling the extruder 1, the measurement results of the rotation speeds of the calendars 5 and 6 are also taken into consideration.

In the raw material supply to the calender based on the above-mentioned procedure, the following procedure is followed when changing the raw material supply amount in order to continuously manufacture tires of sizes different from the current size without stopping the line. ..

First, the rotational speeds of the calendars 5 and 6 are kept at the initial setting values, and various conditions suitable for the structure and size of the member to be processed next are input to the CPU 8. CPU8
Then, based on the entered conditions, the total amount of raw materials used is determined by taking into consideration the amount of raw materials used, the amount of banks in calendars 5 and 6 and the amount of fluctuation in the amount of banks caused by disturbance during operation. Determines the supply ratio to be supplied to the sequencer 9 and sends the information to the sequencer 9. And
The information transmitted to the sequencer 9 is transmitted to the control panel 11 connected to the drive source 1a of the extruder ₁ and the positioning control panel 12 connected to the drive source C ₁ of the cutter 2 via this, and based on the information, the raw material supply amount And / or the position of the cutter C is changed. From extruder 1 to each calendar 5, 6
Since the distance to reach the temperature has been accurately grasped in advance, it is suitable for manufacturing the tire of the size before the change when the changed area of the raw material g reaches each calendar (from the calendar to the changed area). Under the above conditions), the rotation speed of each calender is changed to a rotation speed suitable for the raw material supply amount of the extruder 1. When changing the amount of raw material supplied to the calender, the amount of banks in the calender changes slightly, but even if the amount of raw material supplied changes due to changes in the structure of the material to be processed or size changes, the standard bank that was initially defined The amount does not change much and is kept almost constant.After changing the raw material supply amount, the measured bank amount is compared with the preset standard bank amount as described above, and the measured bank amount is the standard bank amount. Continue steady operation by controlling to match the quantity.

In order to improve the controllability in supplying the raw material according to the present invention, a drive source for positioning the calender, the extruder, and the cutter 2 should have high responsiveness, and a DC motor or the like is suitable. ..

As the supply amount adjusting cutter 2 provided at the discharge port 1a of the extruder 1, those shown in FIGS. As shown in FIG. 3, the number 13
Is a cutter blade that divides the raw material g discharged from the discharge port 1a of the extruder 1, 14 is a slider that holds the cutter blade 13 at both ends thereof and is movable along guides 15a and 15b, and 16 is a screw rod. The screw rod 16 is, for example, screwed to a slider 14, one end of which is connected to a drive source C ₁ which is fixedly held by the extruder ₁ and the other end of which is connected to a rotary encoder R which is also fixedly held by the extruder 1. To do. This rod 16 is rotationally driven by the drive source C ₁ , and the cutter blade 13 is moved along the width direction of the discharge port 1a of the extruder 1 and stopped at a predetermined position, so that the raw material to be divided at the boundary is divided. Change the supply rate. The cutter 2 exemplified in the present invention is shown as a type in which the raw material discharged from the extruder 1 is divided into two, but by changing the shape of the cutter blade 13 or the shape of the discharge port 1a of the extruder 1, three cutters or The present invention can be applied to the case of supplying the raw materials to more candleders, and the control in that case may follow the above-mentioned procedure.

FIGS. 4 (a) and 4 (b) show the fluctuation state of the bank amount when the raw material is supplied to each calendar according to the conventional method, and FIGS. 5 (a) and 5 (b) show that each calendar according to the present invention. The following shows how the bank volume changes when raw materials are supplied. According to the present invention, the fluctuation of the bank amount in the calender is extremely small, which confirms that a processed member having stable quality can be obtained.

[0015]

As described above, according to the present invention, the following effects can be obtained. 1. Automatic control is possible and productivity can be improved. 2. It is not necessary to stop the line even if the structure of the member to be processed is changed or the size is changed. 3. It is possible to supply raw materials to multiple calendars without excess or deficiency, so that high yield operation can be realized. 4. It is possible to simplify the required equipment by reducing the means of supplying raw materials. 5. Since there is no need for manual adjustment, there is no control delay and product quality can be stabilized.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view of equipment suitable for carrying out the present invention.

FIG. 2 is a diagram showing a control system of the equipment shown in FIG.

FIG. 3 is a structural explanatory view of a cutter for adjusting a supply amount of a raw material.

FIG. 4 is a diagram showing a change situation of a bank amount of a calendar.

FIG. 5 is a diagram showing a change situation of a bank amount of a calendar.

[Explanation of symbols]

 1 Extruder 2 Cutter 3 Conveyor 4 Conveyor 5 Calendar 6 Calendar 7 Sensor 8 CPU 9 Sequencer 10 Calendar control panel 11 Extruder control panel 12 Positioning control panel 13 Cutter blade 14 Slider 15 Guide 16 Screw rod g Raw material P Ply cord

Claims (3)

[Claims] 1. When the raw material discharged from the raw material supply means is divided into at least two parts by a supply amount adjusting cutter provided at a discharge port of the supply means, and the divided raw materials are fed to respective calendars individually arranged. The amount of raw material stagnation in each calendar is measured by a sensor arranged in each of the calendars, and the supply amount of the raw material supply means and the position where the cutter is arranged so that the measured stagnation amount matches a preset standard stagnation amount. A method for controlling raw material supply to a calendar, characterized in that at least one of the above is adjusted. 2. The total supply amount of the raw material discharged from the discharge port of the raw material supply means determines the total rubber supply amount obtained from the structure of the member to be processed, and the total supply amount of the raw material supply means is determined based on this total supply amount. The method according to claim 1, wherein the rotation speed is initialized, and the supply amount adjusting cutter is positioned so that the supply amount of the raw material to each calendar becomes a predetermined supply ratio. 3. A process of dividing the raw material discharged from the raw material supply means into at least two parts by a supply amount adjusting cutter provided at a discharge port of the supply means and feeding the divided raw materials to respective calendars individually arranged. When changing the supply amount of the raw material to be fed to each calendar, the feed amount of the raw material in the raw material feeding means and / or the feed rate of the raw material supplied by the feed amount adjusting cutter while keeping the rotation speed of each calendar constant. A method for controlling supply of raw material to a calendar, which comprises changing the rotation speed of each calendar when the changed area reaches each calendar and adjusting the rotation speed of each calendar to a rotation speed suitable for the supply amount of the raw material after the change.