JPH0587720A - Polishing method and polishing device - Google Patents

Abstract

PURPOSE: To obtain a high performance method and device by which the polishability of a tire tread compound at both high and low polish severity levels. CONSTITUTION: A polishing device is provided with a plurality of test stations 14, a driving module 16 connected to the stations 14, and a grindstone 20 sample wheel 24 which is driven in a rotatable state by means of the module 16. The device is also provided with a powder transferring wheel which can be engaged with the wheel 24 and a choke member which can be engaged with the powder transferring wheel. The module 16 has a gear assembly which changes the speed of the sample wheel 24 in connection with the speed of the grindstone 20 so as to adjust the slip value, accordingly, the polishing degree of the wheel 24.

Description

Detailed Description of the Invention [0001] FIELD OF THE INVENTION The present invention is a method and apparatus for polishing.
Regarding More specifically, the present invention provides a variety of
Abrasion rate, abrasion resistance and / or the compound under abrasion severity conditions
Or a tire tread compound for measuring the polishing strength or
Equipment for polishing other types of rubber compounds and
Regarding the method. [0002] 2. Description of the Related Art Tire tread compounds or other ties
Known equipment for polishing rubber compounds in
Includes a test station with a moving polishing surface.
ing. A sample of the compound engages with this moving polishing surface
Get polished. The amount of material abraded from the sample is then measured
Subject to actual tire wear or other abrasive conditions
Tire tread compound wear rate, wear resistance and / or grinding
The wear intensity is predicted. One found in some known polishing equipment
The problem is that they contain only one test station.
First, it takes a long time to test one compound
This is often the case. In addition, a single test
Account for inherent test variability in a workstation
That is usually impossible. As a result, such a device
The polishing data provided by
Exact Roots for Predicting Actual Wear Properties of Dod Compounds
Don't provide the evidence. Already found in some known polishing equipment
One problem is the surface stripes at the interface between the wheel and the sample compound.
The problem is that it is not properly controlled. Thailand for example
In the case of Yatread compound, the oily layer of deteriorated rubber material
Often forms the contact surface of the grindstone. This oily layer
Reduces the degree of polishing with a whetstone. As a result, like this
The device is not accurate in predicting the wear rate of the compound.
More likely to provide data. Another found in known polishing methods and equipment
One problem is one level of polishing severity or average level.
Abrasive data to predict tread wear in
Is provided. However,
Some red compounds have different levels of polishing severity.
The relative tread wear characteristics changed dramatically
There are some things that can be profitable. For example, some tire treads
The compound has a high tread wear ability at low polishing severity levels.
The force is very low at high polishing severity levels.
Indicates red wear capacity. As a result, one of the polishing severities is
Known polishing equipment that only polishes at level or average level
Oki provides polishing data that is often misleading.
It For example, at low polishing severity levels tire tires
Such devices were used to test red compounds.
The same compound at a high polishing severity level
May show extremely low tread performance,
Excellent tread performance may be displayed. This and
Should such a tire tread make a tire
Used for high severity polishing (for example,
(Formance car tire), this tire has a high wear rate
Likely to show and / or show irregular wear patterns
Become [0007] Significantly different abrasion at different polishing severity levels
One of the tire tread compounds that show wear rate characteristics
The problem is that tires made from such compounds are often
To produce an irregular wear pattern.
It Irregular wear is often an irregularity in the tire tread.
Demonstrated to be caused by uniform stress distribution
Has been done. The tire tread compound has a high polishing severity level.
If the bell shows low polishing strength, then it is even higher
The tire cross-section is subject to level severity or stress.
Will wear more rapidly than any other cross section. That
As a result, such tires often have irregular wear patterns.
This pattern significantly shortens tire life.
Contract. [0008] As mentioned above, the high
For both high and low polishing severity levels
Test the abrasive properties of certain tire tread compounds.
Being able to do so is extremely important. Known methods and equipment
Oki was not used to perform this function
Therefore, such compounds are usually polished at both high and low severities.
For actual tire testing on road vehicles under conditions
So tested, which is time consuming and costly
It is a procedure. Therefore, it is an object of the present invention to provide known polishing methods and
And to overcome the problems and drawbacks of the device. [0009] [Means for Solving the Problems] To achieve the above object
To polish the carbon black-containing compound according to the present invention.
Equipment for supporting the frame, the prime mover, and the frame.
It has a plurality of carried test stations. Each test
The station includes a grindstone, which is connected to the prime mover.
It is driven rotatably by a prime mover. each
The test station also includes a sample wheel,
The sample wheel is likewise connected to the prime mover, which
It is driven in a rollable manner. Each sample wheel is polished
Contains a carbon black compound that should be pressed against the grindstone
To grind carbon black containing compounds
Can be combined. Each test station is further tested.
Powder transfer wheel that can be engaged with the material wheel
Choke that can be engaged with the powder transfer wheel
The parts are included. The chalk component is made of chalk powder.
Transfer to lance wheel. Meanwhile powder transfer
The wheel transfers the chalk powder to the sample wheel and
Grind the interface between the wheel and the grindstone. First gear
The material is connected to the prime mover, the sample wheel and the grindstone.
The first gear member is a sample wheel in relation to the speed of the grindstone.
As with setting the speed of the wheel, the test with the whetstone
Selected to set the polish of the material wheel. In the device of the present invention, each test station
The solution is further coupled to the first wheel connected to the sample wheel.
Includes Mori. This first weight is a sample wheel on a grindstone.
Set the force to press the ear and then test with the whetstone.
Selected to set the polish of the material wheel. Each
The test station of the
And an elastic member connected to the base. Elastic member
Between the powder transfer wheel and the sample wheel.
It The chalk member transfers chalk powder to the elastic member,
The elastic member transfers the chalk powder to the sample wheel.
It In the device of the present invention, each test strip is
Station is also connected to the powder transfer wheel.
Includes a second weight that is stored. This second weight is
Controlling the amount of chalk powder applied to the sample wheel
The powder transfer wheel for the sample wheel should be
And selected to set the force of the elastic member. Cho
Use magnesium hydroxide, gypsum and water
Made with a mixture containing. In the device of the present invention, the first shaft is
Connected to the first gear member, prime mover and sample wheel
There is. The first shaft has a shape capable of rotating the sample wheel.
Since it is driven by
It The second shaft is the first gear member, the prime mover and the grindstone.
And drive the grindstone in a rotatable manner. First tooth
The vehicle member has a first shaft in relation to the speed of the second shaft.
Set the speed of the shaft of the
Selected to set the speed of the sample wheel in the
Be done. The device according to the invention further comprises a first chassis.
And a second gear member connected to the first gear member
include. The first shaft drives the second gear member
However, the second gear member drives the first gear member.
A third gear member is provided on the second shaft and the first gear member.
Are connected. The first gear member is the third gear member
When driven, the third gear member drives the second shaft.
The relative speed of the first and second shafts and thus the sample wheel.
Relative speed of the wheel and the grindstone, respectively, of the first gear member
Set by selecting size. First sha
Shaft and the second shaft, and thus the sample wheel and grindstone.
Are driven so that they can rotate in opposite directions.
It The present invention also applies to the study of tire tread compounds.
Provide a method of friction. The method of the present invention includes at least two
Including the step of weighing the sample wheel of
Each sample wheel contains a tire tread compound.
Each sample wheel is in engagement with each wheel
Specimen wheel that is polished by being rotated in
And the relative speed of the grindstone determines the first slip value. This
When the tire tread compound at the first slip value is
Each sample wheel is weighed to measure material loss
To be done. Next, at the second slip value,
To rotate each sample wheel in engagement with the stone
The sample wheel is ground more. Then each sample wheel
Is the loss of tire tread compound at the second slip value
Is weighed to measure Next, with the third slip value
Rotate each sample wheel while engaging with each whetstone
By doing so, the sample wheel is polished. That
After that, each sample wheel is weighed and the tire at the third value is measured.
The loss of tread compound is measured. According to the method of the present invention, each slip value is
The difference between the speed of the sample and the speed of the grindstone
Based on what is divided by speed. First slip value
Is in the range of approximately 5% to 9%. Second slip value
Is in the range of approximately 9% to 17%. In addition, the third pickpocket
The p-value is in the range of about 17% to 30%. Preferably
Has a first slip value of about 7% and a second slip value of
The value is about 13% and the third slip value is about 21%. The present invention also relates to compounds containing carbon black.
Provide a method of polishing an object. This method includes multiple sample parts.
A step of weighing each of the materials is included, where each sample is
The outer surface of the is made of a compound containing carbon black.
Specimen members are each ground in a rotational engagement with their respective polishing members.
Be rubbed. Of the sample member in relation to the speed of the polishing member
The speed determines the first slip value. Next, the sample member
At least one other abrasive member with a first slip value
And is polished in a rotationally engaged state. Then the first slip
Compound containing carbon black from each sample member at the specified value
The loss of material is measured. Next, the sample member is subjected to the second slip value.
Polished in a rotational engagement with each polishing member. Each sample
The member then has at least one of its second slip values.
Polished in a rotational engagement with another polishing member. Then the
Carbon black from each sample member with a slip value of 2
The loss of contained compounds is measured. In one method according to the invention, each
Approximately 10,000 revolutions to 2 sample members with each polishing member
It is rotated within the range of 0000 rotations. Same sample material
Similarly, with each polishing member, about 800 to 900 revolutions per minute
It can be rotated even within the rolling range. Sample member and polishing member
Ambient temperature controls the degree of polishing of the sample member by the polishing member
Controlled to do so. This ambient temperature is preferably
Maintained within the range of about 40 ° C to 55 ° C. Each slip
The volume loss per stroke unit of each sample member
Calculated to. This volume loss is measured for each sample member.
Weight loss and the density of carbon black-containing compounds.
It is based on One advantage of the method and apparatus of the present invention
Is an inherent variation in the abrasiveness (friability) of the individual abrasive members.
All dynamics, each sample wheel or member is
Minimized by pressing against the material and polishing
There is that. Another advantage of the present invention is that
Various slip values and therefore various polishing severity levels
It is possible to polish the sample wheel or member in
There is something that can be done. Therefore, polishing at each slip value
Based on the weight of the sample wheel measured after
It is possible to predict the irregular wear resistance of tread compounds.
Wear. On the other hand, usually one polishing severity level or
Known polishing method and apparatus for polishing only at a uniform level
Commonly used to accurately predict irregular wear resistance
It cannot be done. Another advantage of the present invention is the choke member.
And sample wheel of powder transfer wheel
A thin film of chalk powder on the interface between
It is to apply. As a result, the chalk powder is
An oily layer of degraded rubber material is used for each sample wheel and its
Prevents from occurring on the interface between each grindstone. Oily layer
Is the polish of the sample wheel at a constant slip value.
And thus the instrument provides inaccurate polishing data.
Cause Other advantages of the invention are as follows.
Description and associated reference to the accompanying drawings
It will become clearer. [0022] DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a polishing apparatus according to an embodiment of the present invention.
The device is generally designated by the reference numeral 10. Polishing equipment
10 (hereinafter referred to as device 10) is a kibinet 12
And place it in this cabinet with its ends connected.
12 test stations 14 (6 here)
Are illustrated). Therefore, this device 10
There are 6 right and left columns of the storage station 14
Includes a test station. The device 10
Drive the test station 14 as detailed below.
The drive placed in the center of the cabinet 12 for movement.
A dynamic module 16 is included. Two test stations 14 are shown in FIG.
A U-shaped tes as a whole as shown in
It is mounted in the frame 18. In Figure 2,
The quasi-test station 14 is shown in more detail
There is. The test station 14 has a whetstone drive shaft
A grindstone 20 wedged to 22 is included. this
The grindstone drive shaft 22 is attached to the front end of the test frame 18.
Journaled. The grindstone 20 has a peripheral surface tab.
To remove any sharp protrusions on the polished surface.
Has been blunted by conditioning with a long wheel
It By blunting the grindstone 20, the device 10 is
The cutting polishing that would adversely affect the polishing test
Can be avoided. As shown by the dotted line in FIG. 2, the test stay
In addition, the first sample immediately above the whetstone 20
Sample wheel wedged to wheel drive shaft 26
24 is included. The sample wheel 24 is made of steel
A25 (shown in dotted lines) and compression molding on this steel core
Included is a layer of sample material that has been removed. The sample material is, for example
It is a tire tread compound containing carbon black. Standard
Quite quasi, the layer of sample material is about 1.27 to 2.54 cm.
It has a thickness of (0.5 to 1.0 inch). Sample wheel
24 cut one tire tread compound strip
Wrap this strip around a steel core 25
By molding. This strip is then
Heat and pressure in a suitable mold in a manner known to
Under compression on a steel core 25. As shown in FIG. 2, the sample wheel
The drive shaft 26 is the free end of the sample wheel frame 27.
Journaled in. On the other hand, this sample wheel frame
The shaft 27 is a shaft of the second sample wheel drive shaft 28.
Is journaled to the frame 18 at one end
It The second sample wheel drive shaft 28 is the frame 1
8 is journaled at the upper rear end. Therefore try
The material wheel frame 27 is a second sample wheel drive chassis.
The sample wheel 24 is ground by being swung around the shaft 28.
Moved to engage and disengage stone 20
Let Normal force of the sample wheel 24 against the grindstone 20
It is controlled by the counterweight 29. This balance
As shown in FIG. 2, the
It is suspended from the free end of the wheel frame 27. Servant
Therefore, the degree of polishing by the grindstone 20 with respect to the sample wheel 24
By adjusting the weight of the counterweight 29
It is partially adjustable. The test station 14 is further provided with a sample
First sample wheel drive shuff adjacent to wheel 24
Includes a first sprocket 31 wedged to the toe 26.
It is rare. The second sample wheel drive shaft 28
The second sprocket 32 is wedged,
Ket is placed in line with the first sprocket 31
Has been. Drive both sprockets and then the sample wheel
The first sprocket 31 and the first sprocket 31
One sample wheel drive over the entire 2 sprocket 32
The moving belt 34 is placed. As shown in Figure 1.
As described above, the second sample wheel drive shaft 28 is a drive module.
Connected to the tool 16 and thus further detailed below.
The sample wheel 24 is driven as described above. The test station 14 also includes bearings.
The support 38 is used to jar the sample wheel frame 27 at one end.
Includes a powder wheel frame 36 that is
ing. The powder transfer wheel 40 has a bearing support 42.
Jar on the free end of this powder wheel frame 36
Nulled, as shown in Figure 2, the sample wheel
Can be engaged with the ruler 24. So this powder wheel flare
The frame 36 is swung around the bearing support 38, and
The powder tran should be engaged or disengaged with the reel 24.
The spur wheel 40 is moved. The test station 14 further includes a powder hoist.
The sample wheel frame 27 adjacent to the base frame 36
A chalk stick mounted on the
Includes a back arm 44. Chalk sticker
A bracket 47 is used to choke the free end of the
A tick 46 is placed. It's shown in Figure 2.
Sea urchin, the free end of the chalk stick 46
Under the weight of tick 46 and choke stick arm 44
Keeps the powder transfer wheel 40 engaged
Has been done. Bracket 47 is a chalk stick 46
Tighten up and secure with screws 48, chokes
Holds the tick in place. The chalk stick is preferably hydroxy.
Is it a mixture of magnesium iodide, gypsum and deionized water?
Powder transfer from a thin film of chalk powder made from
It is provided for transfer to the wheel 40. For example
Approximately 170 grams of baked gypsum, 80 grams of hydroxide mug
Mixing nesium and 150 grams of deionized water
Allows you to make several chalk sticks
It Then pour this mixture into the mold for about 1 hour
Let it harden. After this, the choke is removed from the mold and about 1
Heat at 00 ° C for 1 day. After heating, the chalk is then individual
The choke stick 46 is cut. The powder transfer wheel 40 is made of rubber.
Firing with core 50 and preferably polyurethane foam
An outer layer 52 of material is included. Almost the same width as the rubber core 50
A rubber band 54 on the outer layer 52 of the foam material
Get caught. Thus, this rubber band 54 is
Both the tool 24 and the lower end of the chalk stick 46
It is kept in the engaged state. The rubber band 54 is a chalk stick
Received chalk powder from the cook 46, and then this chalk
The powder is transferred to the outer surface of the sample wheel 24. Chalk powder
Is the surface condition of the interface between the sample wheel 24 and the grindstone 20.
Is given to control. If the powdering is insufficient, the grindstone 20 is ground.
An oily layer of degraded sample material is formed on the polished surface,
As a result, the polishing rate of the sample wheel 24 may decrease.
It However, if there is too much chalk powder, this powder will
Prevent effective contact between the sample wheel 24 and the grindstone 20,
Similarly, it is possible to reduce the polishing rate of the sample wheel 24.
There is a nature. Therefore, the chalk stick 46 is preferable.
Is a thin layer of chalk powder between the sample wheel 24 and the grindstone 20.
Lightly engages the rubber band 54 to maintain the
It is forced. Powder transfer for sample wheel 24
The force exerted by the wheel 40 is shown in FIG.
It is controlled by the counterweight 56 as if it were. One
The counterweight 56 is a powder tran with one cord 58.
It is connected to the spur wheel 40. This code 58
Are both supported by the cabinet 12 above the frame 18.
On the first pulley 60 and the second pulley 62 that are held
It has been placed. The device 10 is further standardized in FIG.
Including a plurality of heaters shown as. Heater
64 is preferably an electric heater, inside the cabinet
Mounted in cabinet 12 to heat the part
It The thermocouple, which is typically shown as 65, also
It is placed in the cabinet 12. The thermocouple 65 is
Control the operation of the heater and thus
A heater 64 is provided by an electric wire 66 so as to maintain a favorable temperature.
Is linked to. Relative wear rate depends on tire running temperature
The temperature inside the cabinet 12 may change
The degree is the degree of polishing by the grindstone 20 with respect to the sample wheel 24.
The weight of the counterweight 29
Can be adjusted. According to FIGS. 4 to 6, the drive module of the device 10 is
The tool 16 is shown in more detail. This drive
The tool 16 has a U-shape as shown in FIG.
A shaped drive module frame 68 is included.
At the rear upper end of the drive module frame 68, the first drive
The moving shaft 70 is journaled by the bearing support 71.
Has been. Below the first drive shaft 70, the drive module
In front of the frame 68 by the bearing support 73
Drive shaft 72 is journaled. Drive
Test station adjacent to module frame 68
Between fourteen, the sheave 74 locks onto the first drive shaft 70.
It is rusted. Drive belt 76 is on pulley 74
An electric motor mounted to drive the first drive shaft 70.
It is driven by 77. As you can see in Figure 1.
First, the first drive shaft 70 drives the sample wheel 24.
Coupled to a second sample wheel drive shaft 28 for movement
Has been done. The drive module 16 is further illustrated in FIG.
Wedged to drive shaft 70 as shown
A first gear 78 is included. Bearing supports 82 and 84
Allows the first drive shaft adjacent to the first gear 78.
Gear frame 80 is journaled around 70
ing. The gear frame 80 is driven from the drive shaft 70
Toward the front end of arm 68, as shown in FIG.
Extends outward and can be swiveled around the drive shaft 70
Noh. The drive module 16 is further shown in FIG.
Are spaced inwardly from the drive shaft 70 as shown.
The bearing support 87 journals the gear frame 80.
It includes a fastened second gear shaft 86. Second
Gear 88 wedges into the free end of the second gear shaft 86.
Fastened and dimensioned to engage the first gear 78
Has been. The drive module 16 is further illustrated in FIG.
As shown in FIG. 6, the second gear shaft 86
Spaced in the vicinity, the jar is attached to the free end of the gear frame 80.
Includes a third gear shaft 90 that is nulled
It The third gear 92 is the self of the third gear shaft 90.
Wedge-locked to the second end as shown in FIG.
Positioned and dimensioned to mesh with the gear 88 of the
There is. The fourth gear 94 is free of the third gear shaft 90.
Wedge-fastened to the end, as shown in FIG.
Is spaced from the gear 92 of the. The fourth gear 94
Free end of gear shaft 90 for locking onto shaft
A gannat 96 is passed through. See Figure 4
The shaft 90 on the outer surface of
It is notched so that you can pass it by hand.
Therefore, the fourth gear 94 is easily removed from the gear shaft 90.
Can be removed from the first drive as described below.
Gear ratio between dynamic shaft 70 and second drive shaft 72
Can be replaced with different size gears
Wear. The drive module 16 further includes a second drive.
The fourth gear 94, which is wedged to the moving shaft 72
Includes a fifth gear 98 positioned below
It As shown in FIGS. 4 and 6, the fifth gear 9
8 is dimensioned and positioned to mesh with the fourth gear 94.
It is put in place. Therefore, the fifth gear 98 is driven by the second drive.
Driven by a fourth gear 94 to drive shaft 72.
Be done. The second drive shaft is as shown in FIG.
To drive the grinding wheel 20 of the test station 14
It is connected to the drive shaft 22. At the front end of the drive module frame 68,
The holding plate 100 is placed on the gear frame 80.
Adjacent to the free end and extends upward. This holding play
Toe 100 has a rounded shape extending inward as shown in FIG.
A plurality of holes 102 are formed. The gear frame 80 is also the same
A hole at its free end 104 (shown in dotted lines)
). Note that this hole has a diameter similar to that of each hole 102.
Iz has a determined diameter. As shown in Figure 6
In addition, the drive module 16 further includes any of the holes 102.
Through and also fit into the hole 104 in the gear frame 80.
Includes retaining pin 106 sized to fit
There is. The holding pin 106 is held by the cord 108.
Is connected to the plate 100. Thus the gear frame
The dome 80 extends through any one of the holes 102.
By inserting the retaining pin 106 into the hole 104
Is locked in relation to the holding plate 100.
Has been. The first drive shaft 70 and the second drive shaft
Gear ratio between gears 72, and thus the speed of the sample wheel 24.
The ratio of degree to speed of grindstone 20 is different for the fourth gear 94.
Can be adjusted by using size gears
Wear. The fourth gear 94 is a tooth with the ganatt 96 removed.
Turning the car frame 80 upward around the drive shaft 70
Will be exchanged. This fourth gear 94
Thus, the engagement with the fifth gear 98 is released. next
The fourth gear 94 is pulled out from the shaft 90,
New lock on the end of shaft 90
It is replaced by the gear 94. New fourth gear 94
Once lowered to engage the fifth gear 98
And the gear frame 80, through the appropriate hole 102, the pin
Locked in place by inserting material 106
It The hole 102 then connects the free end of the pin member 106 to the gear frame.
Lead into the hole 104 in the room. As shown in FIG. 5, the drive module
16 is also the left leg of the drive module frame 68.
Wedged to the first drive shaft 70 adjacent the section
A first disc 110 that has been opened. First disc
The drive module frame 68 adjacent to the
One optical sensor 112 is mounted. Optical sensor 1
12 detects the rotation speed and detects the first disk 110 and the first disk 110.
Rotation speed of the drive shaft 70 of the sample machine
Is counted. The first optical sensor 112 is shown in the figure.
Output to the first digital display device 114
Generate a signal. This display shows the speed of the sample wheel.
And the number of rotations are displayed. The drive module 16 further includes a drive module.
A second drive chassis adjacent to the left leg of the frame 68.
Including a second disc 116 wedged to the shaft 72.
I'm out. The drive module is adjacent to the second disk 116.
The second optical sensor 118 is mounted on the frame 68.
Has been done. The second optical sensor 118 detects the rotation speed
The second disc 116 and the second drive shaft
First, the number of rotations of the grindstone 20 is counted. Second sensor 118
For the digital display device 120 shown in FIG.
Generate an output signal. This display device shows the speed of the grindstone 20.
And the number of rotations are displayed. In the operation of the device 10, the drive module
16 is a sample wheel and a grindstone of the test station 14.
Drive 20. This sample wheel is like that
Compound of sample wheel
Provides the polishing data of. The electric motor 77 is started
And the pulley 74 of the drive module 16 is the first drive shuffle.
Drive 70. The first drive shaft 70 is the second trial.
The drive wheel drive shaft 28 to drive this shaft 2
8 is the second sprocket 3 of each test station 14
Drive 2 Therefore, each second sprocket 32
Rotates each sample wheel drive belt 34.
The belt 34 rotates the first sprocket 31.
Then, each wheel 24 is driven. The electric motor 77 is likewise connected to the first drive shaft 7
By driving 0, the grindstone 20 is also rotated,
The shaft 70 drives the first gear 78. First gear
78 drives a second gear 88, which is the third gear 88.
The gear 92 and the fourth gear 94 are driven. Fourth gear 9
4 drives a fifth gear 98, which drives the second gear 98.
The moving shaft 72 is driven. The drive shaft 72 is a grindstone
It is connected to the drive shaft 22, and this shaft 22
Drive the grindstone 20 of the station 14 in a rotatable manner.
It As shown by the arrow in FIG. 2, the sample wheel 2
4 and the grindstone 20 are driven so that they can rotate in opposite directions.
There is. All sample wheels 24 have a first drive shaft 7
Driven by 0, all sample wheels are the same
Driven at rotational speed. Similarly, all the grindstones 20 are
Since it is driven by the second drive shaft 72,
All stones are driven at the same rotational speed. Each of the test stations 14
The polishing rate of the sample wheel 24 is the line of the sample wheel 24.
Ratio of (or tangential) speed to line (or tangential) speed of grindstone 20
Controlling what is called the rate or slip value (S)
Set by and. The slip value (S) is the following formula
It is defined as in (1). [Equation 1] In the formula, V_SIs the surface to be polished of the sample wheel 24
Is the linear velocity of V_GIs a line on the surface to be ground of the grindstone 20.
It's speed. The slip value (S) is the value of the fourth gear 94.
Controlled by selecting an appropriately sized gear
It Preferably the device 10 has a slip value (S) and thus
Polishing rate is within the range of slip of about -30% to + 30%
4 of different sizes, so that they can be set in increments of
It is possible to use the same number of gears 94. A standard abrasive test odor according to the present invention.
The sample wheel 24 under different polishing severity levels.
Multiple slip values (S) to provide polishing data at
Be polished in. Preferably 2 to 5 of each test compound
One sample wheel 24 is ground. However,
The device 10 has one sample at each test station 14.
Wheels can be ground, so up to 12 at a time
Individual sample wheels can be ground. Therefore,
It is possible to polish a plurality of different compounds at the same time in the apparatus 10.
it can. Polished for a given compound
The number of sample wheels 24 required is between compounds
It depends on the distinction. For example, two sample wheels
When striking, the deviation from the average is usually about 3% to 5%
is there. Five sample wheels are tested against this
In that case, the deviation from the average is usually about 2% to 3%. The diameter and weight of each sample wheel 24 are
At the start of the polishing test to determine the volume loss due to abrasion
And measured after rotation at each specified slip value.
Be done. The weight of the sample wheel 24 is preferably about 0.
An electronic scale with an accuracy of 1 mg is used. Measured weight
Weight loss is corrected for weight loss due to evaporation during the test.
Be done. The correction for weight loss due to evaporation is detailed below.
It ’s kept inside the cabinet 12 as mentioned.
Although made of unpolished, tested compounds
Determined from the weight change of the dummy sample wheel 24
It Specimen wheel diameter is preferably Connecticut
Manufactured by Zygo Co. of Middlefield
With the Gigo Laser Micrometer 1201B type
Measured with a laser micrometer. Each
Three measurements taken at approximately equal intervals along the circumference of the runner
The measurements used are the average of three measurements made.
It becomes a value. Average volume loss per stroke unit (cc / c
m) or of the runner for each of the given compounds
The wear rate (W) is calculated after polishing at each slip value.
It Volume loss (cc) is the weight change of the corresponding dummy (
Measured weight loss for each runner (corrected based on
And the density of the compound. Each slip
The stroke (cm) of each runner at the
Runner after polishing with the measured diameter and its slip value
Calculated by determining the average of the diameter measurements of
This average diameter measurement is then the
Used to determine the average perimeter of a woman. Then this
Multiply the average circumference of the
Find the stroke (cm) of the woman. At this time, the following equation (2) gives different slips.
To analyze the data by value, for each compound tested
Applies to volume loss data. [Equation 2] In the formula, W is the sample wheel 24 for each compound.
Is the wear rate of S, and S is defined in equation (1)
Is the slip value, and K and n are
It is an empirically determined constant calculated from (2). Next tested at each slip value
The laboratory polishing index (LI) for each compound is
Determined by (3). [Equation 3] In the formula, W (reference) is the sample wheel 2 of the reference compound.
Wear rate of 4 and W (sample) is
This is the wear rate of the sample wheel 24. Always polish with the other sample wheel 24
Fewer sample wheels 24 made from standard compounds
There is at least one. This reference compound is determined by the formula (3).
Determining the lab polishing index (LI) as justified
For comparison purposes with other sample compounds being tested
To be polished. Effect of hardness of test compound on wear rate
If you have to take into account
Area of contact marks between the wheel 24 and its respective grindstone 20
Is measured similarly. The contact mark is the grinding of the sample wheel 24.
Inking some sections of the abraded surface
It is measured by The sample wheel 24 is a test station.
Mounted inside the grinding wheel 14 and the polishing surface of each grindstone
A piece of paper is placed throughout. Then the sample wheel
The inked surface of each is a counterweight
Under the force of 29, it is lowered to engage the paper sheet.
It Then preferably Mountain Bi, California
Manufactured by Kontron Co., Ltd.
Kontron image analysis system, KAT386
Use a mold to measure the surface area of inked contact marks on the paper.
Is determined. This contact mark area is preferably the sample wheel.
The initial weight and diameter of the tool 24 was measured at the beginning of the polishing test.
Is measured when At this time, the laboratory polishing index (L
I) is the average contact trace area of the test compound sample wheel
Contact surface of one or more sample wheels with reference compound
It can be adjusted based on the product ratio. Turning now to FIG. 7, the method of the present invention
Therefore, in the test station 14, the sample wheel 24
The sequence of polishing is shown schematically. The above
, Multiple samples molded from different test compounds
A group of wheels 24 is compression molded. Each compound
Some of the sample wheels of the object are pressed against the grindstone 20
Used as a runner to be polished. Other sample hoi
Ruler 24 is polished only during the conditioning phase and is
Simply kept in cabinet 12 while polishing the
Only used as a dummy. Each trial
Core 25 of the feed wheel 24 (both runner and dummy)
Each sample wheel will be identified throughout the test
As you can see, there is one number. The number of dummies for each runner group is
It is preferably determined as follows. That is, the compound
If one batch is tested, four runners and one
I have me. Two batches of a given compound
If tested (multiple batches), 3 for each batch
There is one runner and one dummy. In addition, given
If three batches of a given compound are tested, each batch
There are two runners and one dummy for Titch. Preferred
Preferably, an even sample sample for each given compound.
24 is tested. That is, the sample wheel 24
Half on test station 14 in the left column of device 10.
Polished and the other half is ground on the test station in the right column.
Can be worn. The sample wheel 24 is shown in FIG.
, With 6 wheels per spindle,
They are placed on the spindle in a randomized (stochastic) order.
Place the dummy wheel on a separate spindle (not shown).
Get burned. FIG. 7 shows six of the test stations 14.
This shows only 6 in the left column or 6 in the right column
But it's okay. However, the other side of the test station 14
Row of runners (not shown) are those shown in FIG.
It is polished in the same way as. Next, the sample wheel 24 (runner and dummy)
Both), all spindles at about 100 ° C for about 24:00
Conditioned by placing in an oven for a while. Cat
Vignette 12 is preheated to about 49 ° C and removed from the oven.
At the time of extension, the spider is the next heated cabinet 1.
Place in 2 for about 30 minutes. Then the runners and dummies
Each is placed in its own test station 14,
The state where the temperature in the cabinet 12 is set to about 49 ° C
At 860 rpm, the condition is adjusted to about 10,000 rpm.
It The fourth gear 94 has a slip value of about 7%.
To be sized. After conditioning, the wheels are allowed to cool to room temperature.
Yes, but all wheels throughout the test
The (runner and dummy) are kept at the same temperature. Then grind
The polished surface of stone 20 is cleaned with a wire brush. Cabinet
The net 12 contains any loose material collected during the conditioning phase.
Vacuumed to remove dust particles. Also, powdered tiger
The rubber band 54 on the surface wheel 40 is replaced.
It As mentioned above, the diameter of the runner was then measured.
Be done. After that, both the runner and dummy sample wheels
Each of the 24 is weighed and rounded to the nearest 0.1 mg
Entered and recorded. Then cabinet 12 is at least
Preheat to about 49 ° C for 2 hours. Then runner and da
At least 30 minutes on all of Mie's sample wheels 24
Meanwhile, the inside of the cabinet 12 is heated. The runners are then in the order shown in FIG.
Mounted on each sample wheel drive shaft 26
It The fourth gear 94 has a slip value of about 7%.
And the inside of the cabinet 12 is about 49 ℃.
Maintained. The runner is then about 1500 at 860 rpm.
Polished 0 times. Lanna is stopped once
And removed from each test station 14
Returned onto the spindle in the order shown in 7. next
The runner spindles are again mounted in the order shown in FIG.
Placed on each test station 14 again
About 15,000 revolutions are polished at 860 revolutions per minute. Therefore each
Each runner 24 has a new test station at each polishing stage.
Polished in the section 14. The runners are connected to each test station 14
It is turned over when it is taken out from the
It is placed on the le. Therefore, the direction of rotation of the runner depends on the individual
To avoid errors due to variations between storage stations,
Reverse between each successive test station 14
Be done. Each spindle of the sample wheel 24 has 6 different
Sample wheel that was ground on the test station 14
From one station to the next
Turn these wheels over when you let them. Therefore each
Each sample wheel 24 is used for grinding wheels 2 on one row of the device 10.
Polished on each of the 0. 6 between test stations
After spinning, the runners are in the same order as before the first step.
It must be mounted on the spindle. Therefore, each runner has a first slip value
(7%) gives a total of about 90,000 rotations. Then try
All material wheels 24 have been removed from the device 10 and allowed to reach room temperature
To be cooled. If the wire brush is again applied to the grindstone 20,
The cabinet 12 is then swept to remove loose particles.
The machine is removed, and the rubber band 54 is replaced. That
Later, as described above, the diameter of each runner and the runners and
All wheels on both wheels are re-weighed and recorded
It However, the average weight of all dummies for each compound
Weight loss or gain is a more accurate view of weight loss due to polishing.
To maximize the weight loss of each runner of each compound
Each loss is subtracted or added. At this time, the slip value becomes about 13%.
The fourth gear 94 is replaced so that the temperature of the cabinet 12 is
The degree is reduced to about 46 ° C. Then each runner
6 different test stays in the same way as above
Polished 6 more times at Option 14. However,
During the abrasion phase, each runner is approximately 240 at 860 revolutions per minute.
Rotate it 0 times. Therefore, each runner
The lip value (13%) is rotated about 14400 times in total.
It Then, as described above, each runner diameter, runner and
Both weights of the dummy are measured and recorded. Then, the weight loss at each slip value (S)
Loss and diameter are volume loss or wear per stroke unit.
Translated to Rate (W). Next, this wear rate (W)
Can be applied to (2) and plot the data
Can be analyzed. Same as wear rate (W) data
Then, by applying the formula (3), the laboratory polishing index (LI)
You can also decide. This Laboratory Abrasive Index (LI)
Analyze and compare the polishing strength of the tested compounds
Therefore, it can be plotted as a function of the slip value (S). In another method according to the invention
The device 10 has an irregular wear resistance for tire tread compounds.
Used to measure abrasivity. One example smell
In the same manner as described above.
The tire tread compound is simultaneously polished. However
In the above case, there were two slip values, but here
Continuously grinds three compounds with three different slip values.
Be rubbed. The three slip values are 7%, 13% and
And 21%. Therefore, the tire tread compound
Relatively low, medium and high polishing severity levels respectively
Be polished in. However, with the third slip value (21%)
Each runner is 860 min.
It can be rotated about 2000 times. Therefore, each runner
Is the third slip value (21%) for a total of about 14400 times
Is rotated. Each of the three different tire tread compounds is
CB containing different types of carbon black
₁, CB_TwoAnd CB_ThreeIs labeled. 3 guru
Data collected when polishing the sample wheel 24
The calculation results based on are summarized in the following table. [Table 1] CB₁Compound is a reference compound, other
Has been polished for the purpose of comparing
It Therefore, CB₁The Laboratory Abrasive Index (LI) of a compound is
100. As shown in the table, the wear rate (W) is
Increased with increasing slip value for all three compounds
I am big. However, an important feature of this data is that
CB_TwoThe compound has the highest polishing severity level (21%
CB at the lip value)₁Or CB_ThreeCompound shows
Exhibits a significantly higher laboratory polishing index (LI) than
There is a point. On the other hand, 7% and 13%
In the lip value, CB_TwoLaboratory Abrasive Index (LI) of compounds
Is CB₁And CB_ThreeMuch closer to that of a compound. Servant
The test result is CB_TwoHigh severity compound abrasive
CB under the matter₁Or CB_ThreeBetter than what the compound shows
It means that it shows the polishing strength. Therefore,
CB_TwoCompound is CB₁Or CB_TwoThan any of the compounds
It is likely to exhibit good resistance to irregular wear.
Becomes [0070] One advantage of the device and method according to the present invention.
The point is that the present invention does not exhibit the irregular wear found on existing tires.
In that it can be used to solve problems
It For example, existing tread design tires may have irregular wear.
High polishing severity if found to have wear problems
Other ties that show better abrasive strength at the level
Used in yatread compounds or tire tread compounds
To discover other types of carbon black that should be
In addition, the apparatus and method of the present invention can be used. On the other hand, high polishing severity level and low
Accurately determine polishing strength at both polishing severity levels
Known ineffective devices solve the problem of irregular wear.
Help in pointing out the tire tread compound to make a decision
It is likely not to happen. In fact, in the example above, the known
The equipment in fact does not smell at relatively high polishing severity levels.
CB_TwoAlthough the polishing strength of the compound is much higher, CB_Two
Compound, CB₁Compound and CB_ThreePolishing with almost the same compound
There is a high probability that it will show that it indicates strength
It

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial front view of a polishing apparatus according to an embodiment of the present invention. FIG. 2 is an enlarged side view of the test station of the polisher taken along line AA of FIG. FIG. 3 is a partial side sectional view of the device of FIG. 4 is an enlarged front view of a drive module of the apparatus of FIG. 5 is a partial plan cross-sectional view of the drive module of FIG. 6 is a side view of the drive module of FIG. 4. FIG. 7 is a partial schematic view of the apparatus of FIG. 1 showing the polishing sequence of multiple sample wheels according to the present invention. [Explanation of Codes] 10 ... Polishing device 12 ... Cabinet 14 ... Test station 16 ... Drive module 20 ... Polishing member 24 ... Test member 29, 56 ... Weight 28, 70 ... Shaft 40 ... Transfer wheel 44 ... Choke member 77 ... Motor 78 , 88, 90, 92, 94, 98 ... Gear assembly

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Jiyoung M. Juanto             New Hampshire, USA             03062, Nashua, Byron Drive             11 (72) The inventor, Joji B. Ouyang             USA, Masachi Youtsutsu             02173, Lexington, Foren Road               127

Claims (1)

Claims: 1. A plurality of rotatably supported abrasive members (20); each containing a carbon black containing compound;
A plurality of test members (24) rotatably supported such that each is engageable with a respective polishing member (20) to polish the carbon black containing compound; each test member (24) and each. First means (36, 36) for controlling the surface conditions of the interface between the abrasive members (20) of the
40,44); second means (77,16,28,70,2) connected to the test member (24) and the polishing member (20) for rotatably driving the test member and the polishing member.
2, 72); and to control the relative velocity of the polishing member (20) and the test member (24) to control the degree of polishing of the test member by the polishing member. An apparatus for polishing a carbon black-containing compound, comprising an associated third means (16). 2. A plurality of dusting members (4) are provided in the first means.
0) is included, each dusting member being engageable with a respective test member (24), each dusting member being for each test member and between the test member and each wear member. The device according to claim 1, wherein the powder is applied to the interface. 3. A transfer wheel (40), each powdering member being engageable with a respective test member (24).
And a transfer wheel for applying chalk powder to the transfer wheel (40) and to each test member (24) to dust the interface between the test member (24) and each abrasive member (20). The device of claim 2 including a choke member (44) engageable with the. 4. The apparatus of claim 3 further comprising fourth means (56) for controlling the force of the choke member on the transfer wheel (24) to control the amount of choke dust applied to the transfer wheel. .. 5. The fourth means includes a first weight (56) connected to the transfer wheel, the first weight being selected to set the force of the transfer wheel on the choke member. 4. The device according to 4. 6. A fifth means (29) for controlling the force of each test member (24) against each abrasive member (20) to control the degree of polishing of the test member by each abrasive member. The apparatus according to claim 3, further comprising: 7. The first means comprises a plurality of second weights (2
9), each of the second weights being coupled to a respective test member (24), each second weight being selected to set the force of the test member against the respective abrasive member. Item 6. The apparatus according to item 6. 8. The second means includes a prime mover (77), the third means includes a gear member (16), and the second means further comprises a prime mover (77). ), A first member connected to the test member (24) and the gear member (16)
Shaft (28, 70) and a second shaft connected to the abrasive member (20) and the gear member (16), the gear member including the first shaft in relation to the speed of the second shaft. 2. The apparatus of claim 1 selected to control the speed of the test member and thus the speed of the test member in relation to the speed of the polishing member, respectively. 9. A grinding wheel (20) and a sample wheel (2), respectively.
4), the powder transfer wheel (40) engageable with the sample wheel (24), and the powder transfer wheel (4)
0) and a plurality of test stations (14) including choke members (44) engageable therewith, and to control the relative speeds of the grinding wheel (20) and the sample wheel (24) and thus the sample wheel polish. Drive module (1) coupled to a test station (14) including a gear assembly (78, 88, 90, 92, 94, 98) for
The apparatus of claim 1 comprising 6). 10. A weighing step for each of a plurality of sample members, such that the outer surface of each sample member is made of a carbon black-containing compound; the velocity of the sample members relative to the velocity of the polishing member is a first slip. Polishing each sample member in rotational engagement with a respective polishing member to polish a carbon black containing compound, such as determining a value; at least one other polishing member at a first slip value. Polishing each sample member in rotational engagement; measuring the loss of carbon black-containing compound from each sample member at a first slip value; rotating engagement with each polishing member at a second slip value Polishing each sample member in a state; polishing each sample member in rotational engagement with at least one other polishing member at a second slip value; and each sample Measuring the loss of carbon black containing compound from each sample member at a second slip value determined by dividing the difference in speed between the member and its respective polishing member by the speed of the sample member. Method for polishing carbon black-containing compound. 11. The first slip value is in the range of 5% to 9%, and each sample member is rotated with each polishing member at the first slip value in the range of 10,000 to 20,000 revolutions. And the second slip value is 9% to 17
11. The polishing method of claim 10, wherein each sample member is rotated with each polishing member at a second slip value within a range of 1000 to 5000 revolutions. 12. Grinding each sample member in rotational engagement with a respective abrasive member at a third slip value; in rotational engagement with at least one other abrasive member at a third slip value. 11. The polishing method of claim 10, further comprising: polishing each sample member with a third slip value; and measuring the loss of carbon black-containing compound from each sample member with a third slip value. 13. The third slip value is 17% to 30%.
13. The polishing method according to claim 12, wherein each sample member is rotated at a third slip value within a range of 500 to 4500 rotations. I4. The method further comprising controlling the ambient temperature of the sample member and the polishing member within a range of 40 ° C to 55 ° C to control the degree of polishing of the sample member by the polishing member.
The polishing method according to any one of 0 to 13. 15. A plurality of test member weighing steps such that the outer surface of each test member is made of a tire tread compound to be abraded; the relative velocity of the test member and the abrading member is at a first slip value. Rotating the outer surface of each test member in engagement with the polishing member to polish the tire tread compound in a determined condition; each test to measure the loss of the tire tread compound at a first slip value A step of weighing the member; a tire in which the relative speeds of the test member and the abrasive member determine a second slip value, which second slip value causes a higher abrasive severity than the first slip value. Rotating the outer surface of each test member in engagement with the abrasive member to abrade the tread compound; each for measuring tire tread compound loss at a second slip value. Weighing the test member; the relative speed of the test member and the polishing member determines a third slip value, which causes a higher polishing severity than the second slip value. Rotating the outer surface of each test member in engagement with the polishing member to polish the tire tread compound; and each slip value is the difference between the speed of the test member and the speed of the polishing member divided by the speed of the test member. In order to show the irregular wear characteristics of the tire tread compound by measuring the loss of the tire tread compound at the third slip value, the loss of the tire tread compound at different polishing severities, based on Weighing the member; and polishing the tire tread compound to determine the irregular wear characteristics of the compound. 16. The first slip value is in the range of about 5% to 9%, each test member being 100% of each abrasive member.
It is rotated in the range of 00 to 20000 rotations,
The second slip value is in the range of about 9% to 17%,
The third slip value is in the range of about 17% to 30%, and each test member is in the range of 1000 to 5000 revolutions with each respective abrasive member at each of the second and third slip values. 16. Rotated by
The described polishing method. 17. The polishing method of claim 16 wherein each test member is rotated in engagement with a plurality of respective polishing members at each of the first, second and third slip values.