DE2023398A1 - - Google Patents

Description

PATENYAMWXLTE

DIPL-JNG. FINSTERWALD DIPL-INQ. GRAMKOW ^ - ^ · MONKS 22. ROBERT-KOCH ^ TIi 1
-. TBJFON BS110 -

Künchoii, May 13, 1970 Gs / Sv - B 11.61

THE DUKLOP COMEAHT LIfCTED Dunlop House, Hyder Street, St James's, London S.tf.1, England

Cutting matorial into a predetermined length

The invention relates to a method and an apparatus for cutting material in a given length.

Ee is known, material on a conveyor on a measuring system feed past a cutting device and after measuring a predetermined amount the cutting device to be operated automatically so that a certain length of the material is cut off. It turned out that the cut lengths are not of a uniform size, which may result in, for example, delays in the operation of the cutting device in pole low lubrication or general wear is due. The wrong size is often only discovered if many lengths have been cut and this can result in loss. It can then be a correction of the device must be carried out by hand, for the most part by trial and error, and often several times within a given period of time, e.g. one! day.

009847/1335

The object of the invention is to provide a / experience and a device for cutting caustic solutions <5 of a material, which are substantially uniform in size, i.e. which substantially obviate the aforementioned disadvantages be resolved.

According to the invention is a method of cutting material into lengths each of which is substantially the same a predetermined vert, characterized by the feeding of the material past a Schnoid device, by operating the device for severing a a predetermined length of material by scanning each end of a severed length with a scanning device to measure the size of the severed length, the device / length being movable relative to one another, therewith any change in the predetermined value can be detected, and by providing a signal proportional to any required correction to the cutter, so that the work of the 'cutting device can be stopped and thus the essential uniformity of the Size of a subsequently cut length and the predetermined value is given.

Preferably the scanning device is stationary and each cut length is fed past it.

According to a further embodiment according to the invention features a device for cutting material into lengths, each of which has a size that is substantially equal to a predetermined value, by a cutter operating at predetermined intervals works, through a conveyor for transporting the material past the cutting device, through a cutting device

009847/1335

tung Buii scanning each end of a severed length to dl · Orößa to measure the cut length, the Scanning device and the length can be moved relative to one another, by means of devices for detecting any deviation in dar GrSBa from the predetermined Vert and through. Means for providing a signal proportional to any required correction to the cutter, so that the working of the cutting device can be adjusted and thereby the essential equality of the size of a subsequently cut length given with the predetermined Vert'-iat · Me scanning device is preferably stationary.

The son ejaculation device preferably has a cutter and a first unit of measuring the length of an uneven material fed to the cutter was «whereby the unit can operate the cutter in such a way that ar cuts off a length that is equal to or equal to one size essentially equal to the predetermined vert. .

Preferably, the apparatus further comprising a second measuring unit for Hesse the size of a separated length, wherein the second unit is connected to advise the "and any required correcting signal to this sending can before the next length is separated to obtain a subsequent length, the size of which is equal to or substantially equal to the predetermined Vert.

The invention is illustrated below, for example, with reference to FIG A drawing is described which illustrates a device and method for cutting unvulcanized tread chewing achuk into substantially equal lengths.

009847 / $ 133

The device has a conveyor belt 1 on which a continuous length of uncut tread rubber 2 is delivered by an extruder, not shown, past a first measuring unit 3 » then past a cutter 4 for cutting the running surface rubber into lengths 5 and then past a second measuring unit 6. The first measuring unit 3 measures the length of the de »cutter 4 fed cut tread chews ochuka 2, and the second measuring unit 6 measures the length of the cut lengths 5 "when they are on tape 1 from the cutter 4 are led away.

The first measuring unit 3 has a handwheel 7 which has a circumference of 1000 mm and which is mounted above the conveyor belt 1 for engagement with the upper side of the cut tread rubber. Furthermore, the first measuring unit 3 includes a pulse generator 6 which is driven by the wheel 7 via a shaft 9 and generates a pulse for every millimeter of the wheel rotation. These® pulses are fed to a first presettable, bidirectional counter 10, which also forms part of the first measuring unit, and actuate this counter. »The counter shows a preset number on a first display unit 11, which corresponds to the desired, predetermined cut length in millimeters, and displays on a second display unit 12 a number which corresponds to the length in millimeters of the uncut tread rubber fed to the cutting device.

The second measuring unit 6 has a ribbon wheel 13, a pulse generator 14 and a bidirectional counter 15, each Part similar to the corresponding first parts of the first measurement

009847/1335 ^ÖAD original

unit is only that in this case the thumbwheel is attached to be in engagement with the top of the belt. The second unit also consists of a stationary scanner having a light source not shown and a phototransistor 16 connected between the generator and the counter. The source and phototransistor 16 are mounted so that light from the source is interrupted by a severed length of tread rubber, and the phototransistor 16 is biased to be conductive under a "dark" condition and to be conductive under a "light" condition. -Condition is non-conductive. Thus, the pulses from the generator only reach the counter when a cut length passes the scanning device. "The second counter 15 can also be preset and shows on a display unit 17 the preset number that corresponds to the desired, predetermined, cut length in millimeters, and shows on a second display unit 18 a number that corresponds to the measured cut length in millimeters .

The two- direction counters 10 and 15 and the associated pulse generators 8 and 14 can detect a forward or backward movement of the knurled drive wheels 7 and 3, i.e. if the wheel is driven in a forward direction, the measured count advances or increases, and if it is like driven in the reverse direction, he runs back or decreases. This leads to each forward or backward movement which is detected in the tread rubber and is based on its inherent inertia and / or elasticity, especially during jerky conveyance, either to a subtraction from or to an addition to the counter reading during operation of the measuring units.

009847/1335

The cutter 4- is from the well-known "flying one." Knife "type and has a knife cutting carriage, not shown «Electropneumatically operated clamping devices, not shown to clamp the carriage in the conveyor belt and a cutting knife 19 »that on a lateral guide device 20 is attached.

In operation, both counters are first preset to a number, which represents the desired predetermined severed length, and the extruded tread rubber is guided past the first measuring unit 3 and then past the cutting device 4 on the conveyor belt 1 until the length of the uncut tread rubber passed by the cutter is equal to the desired length, i. e. until the measured count amount equals the preset count amount. If this is the case, a voltage output appears s signal on the first counter 10 and, after a suitable amplification, actuates the cutting device, that at the same time the knife cutting TOgen to the conveyor belt is clamped and the cutting knife lateral guide device is operated.

The cut lengths of 5 d © s tread rubber are of the cutting device 4 away on a wide measuring unit passed by. The wide unit counter 15 is started when the leading edge of a cut length on the phototransistor 16 has passed the scanning device and the counter is stopped when the Hintarkaat® passes «Bi es ar counter 15 compares the measured count (i.e. the measured Length) with the preset amount (i.e. with the desired, predetermined! saga) and gives a dem relevant error from the corresponding output signal, if the measured length outside a given tolerance range lies. This signal becomes the first measuring system counter

fed back and causes any desired setting, namely as addition or subtraction sum preset Counter amount so that a subsequently separated length is substantially the desired predetermined length. The counters also visually indicate the plus or minus error so that an operator can determine a length that is outside of the or any other act can make.

As can be seen from the drawing, the is on the display device 17 of the second counter 15 displayed preset Length 3000 mm. This second counter also shows on the display unit 18 the measured value of the last one cut length that passes the phototransistor 16 of the scanning device, unc. in the example shown this value is 2955 mm. The Pehler is thus 45 mn, and a corresponding error signal is sent to the first counter 10 and displayed on the display unit 11 with 3045 mm, i.e. the desired predetermined value plus the Pehler.

As an alternative, the output of the second counter can be used to have an automatic rejection device, an automatic arkiervorricht'ing, an alarm device or to operate a recording device that supports the records actually performed measurements.

let the cutter be a stationary type rather than the Type of a "flying Hessers" is the conveyor belt 1 with the tread rubber 2 is braked to a standstill upon receipt of a signal from the first counter 10, namely at the same time as the cutting knife traversing device is working. Each type of cutter has an associated one

BATH ORIGINAL

009847/1335

Variables that are difficult to control and compensate for and the accuracy of the cut tread length affect. Examples of these variables are electromechanical-pneumatic Delays, the • conveyor belt speed, the air pressure, shower sections, machine wear and tear and general lubrication, with the effects these variables can essentially be avoided by the invention.

Another advantage of the device according to the invention is that the operator only has to change the desired, predetermined length of cut rubber has to pre-set the counter, vgad not the * scanning device must move, which could lead to another error.

- patent claims -

009847/1335 sad

Claims (1)

Claims Process each of which has a size for the cutting of material in lengths "which is substantially equal to a predetermined value is" marked in ζ calibration net by passing the material to a cutting device pass, by actuating the device for separating a predetermined length of material by da3 scanning each end of a severed length with a scanning device to measure the size of the severed length, the device and the length being movable relative to one another so that any change in the predetermined value can be detected, and by providing a signal which is proportional to any necessary correction for the cutting device so that the operation of the cutting device can be stopped and so that the substantial uniformity of the size of a subsequently severed length and the predetermined value is given. 2. The method according to claim 1, characterized in that that the scanning device is stationary and the cut length is fed past it. 3 · Method of cutting material into lengths according to claim 1 or 2, thereby g e k e η η ζ β i c h η e t that there is a Measure for marking a cut length if its size is outside a given tolerance range lies. 4. A method for cutting material into lengths according to claims 1, 2 or 3, characterized in that that it has a means of discarding a truncated length if its size is outside a given one Tolerance range. 009847/1335 - ίο - 5. Method for cutting material into lengths according to one of the preceding claims, characterized in that it has a means of recording the measured quantity. 6. Apparatus for cutting material into lengths, each of which has a size substantially equal to a predetermined vertex, characterized by a cutting device operating at predetermined intervals by a conveyor for guiding the material past the cutting device a scanning device for scanning each bath a cut length to measure the size of the cut length, the scanning device and length being movable relative to one another by means for detecting any deviation in size from the predetermined value by means for supplying a signal proportional to any necessary correction for the cutting device so that the cutting device can cease to operate and thereby the substantial equality of the size of a subsequently cut length with the predetermined vert is given. 7. Apparatus according to claim 6, characterized marked eichn β t that the scanning device is stationary. 8. Device for cutting material into lengths according to claim 6 or 7t characterized by a « Cutting device comprising a cutter and a first measuring unit for measuring the length of an uncut material has, which has been fed to the cutter, wherein the unit can operate the cutter so that it is a Length which has a size equal to or substantially equal to the predetermined value. 009847/1335 9 · Device for cutting material into lengths according to claim β, characterized in that the first measuring unit has a knurled, rotatable wheel which is in engagement with the uncut material fed to the cutting device, that the first measuring unit has a pulse generator which is actuated by the rotation of the wheel, and that it has a bidirectional counter connected to it for counting the number of pulses received from the pulse generator, the number of Pulse is proportional to the length of the uncut material fed to the cutter and the Counter can operate the cutter when the number of counted pulses reaches a predetermined value. 10. Device for cutting material into lengths according to claim θ or 9 * characterized by a second, measuring the size of a severed sun Length-serving measuring unit, which is connected to the first measuring unit and can send any necessary correction signal to it before the next length is cut off, so that the subsequent length has a size equal to or substantially equal to the predetermined value. 11. Device for cutting material into lengths Claim 10, characterized in that the second measuring unit an old the conveyor belt in singriff bringable, knurled, rotatable wheel, one through the Turning the wheel activatable pulse generator and a Target direction counter that counts the number of the pulses received by the generator is connected to it, that the scanning device only controls the counter 009847/1335 Operated during the tent room, if a separated one Length is sampled by the device, whereby the count displayed by the counter is proportional to the Size of the severed lung, and that the bidirectional counter of the second measuring unit is every required Can send correction signal to the counter of the first measuring unit, so that the predetermined count on the Counter is readjusted and therefore a subsequent one Length is gained »whose size is equal to or substantially equal to the predetermined amount. 12. Device according to one of claims 6 to 11, g e k e η η draws a marking device for marking a cut length if its size falls outside a given tolerance range. 13. Device according to one of Claims 6 to 12, ge k e η η characterized by a separating device for separating a separated length, the size of which is outside of a given tolerance range. 14. Device according to one of claims 6 to 13, g e k e η η records by a recording device for recording the size of the cut lengths. 002847/1335