CA1130624A - Process and machine for coating milled or peeled road surfaces - Google Patents
Process and machine for coating milled or peeled road surfacesInfo
- Publication number
- CA1130624A CA1130624A CA354,894A CA354894A CA1130624A CA 1130624 A CA1130624 A CA 1130624A CA 354894 A CA354894 A CA 354894A CA 1130624 A CA1130624 A CA 1130624A
- Authority
- CA
- Canada
- Prior art keywords
- mixing device
- supply container
- road
- chassis
- combination
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Road Repair (AREA)
Abstract
A B S T R A C T
The invention relates to a machine for providing milled or peeled road surfaces with a coating, comprising a chassis including a drive motor and having in the front portion thereof a supply container for the material to be applied, and in the rear portion thereof a plank-shaped finisher wherein between said supply container and said finisher a mixing device is disposed, which is provided with a first conveyor device feeding the material from said supply container and a second conveyor device feeding the milled-off or peeled material from the ground.
The invention relates to a machine for providing milled or peeled road surfaces with a coating, comprising a chassis including a drive motor and having in the front portion thereof a supply container for the material to be applied, and in the rear portion thereof a plank-shaped finisher wherein between said supply container and said finisher a mixing device is disposed, which is provided with a first conveyor device feeding the material from said supply container and a second conveyor device feeding the milled-off or peeled material from the ground.
Description
~L~ 306;~4 The invention relates to the coating of milled or peeled road surfaces with a coating in which the milled-off mater-ial is reused, so that on one side new coating material is saved and on the other side the transportation of the milled-off mater-ial and its elimination is omitted.
When renewing road surfaces damaged by atmospheric influences or by a hiyh density of vehicles, the road surface is first milled or peeled and when the milled-away or peeled-off material has been removed, a new coating is applied. In the course of the milling or peeling as well as in the course of the application the new coating the milled or peeled road surface may be subjected to heating which ~oth simplifies the milling or peel-ing and provides for a better adhesion of the new coating on the exposed substrate. The milled or peeled material is loaded onto trucks and transported to dumping sites.
In order to keep repair costs per unit road length as low as possible, the milled or peeled material is, in accordance with a prior suggestion, not transported to a dumping site but is rather reemployed for the coating of the milled or peeled road ~; 20 surface. According to this method (the so-called recycling method) the milled or peeled material is mixed together with the new coat-ing material in a ratio conforming to the corresponding require-ments and this mixture is then applied onto the milled or peeled ;~ road surface.
In prior art machines for coating milled or peeled road surfaces, mixing of the milled or peeled material with the new ~; coating material is performed in a separate process and the mater-ial mixture is subsequently transported by a truck to the storage :
3~36Z4 or supply container of the coating machine. Although the mending costs per unit road length may be lowered considerably by this procedure as compared to the prior art methods, relatively high transport efforts are still necessary causing correspondingly high costs.
The present invention is intended to overcome this dis-advantage. It is therefore the aim of the present invention so to improve the prior art machines for coating millad or stripped road surfaces that the application of the new coatiny in accor-dance with the recycling method may readily be performed.
The invention provides in apparatus for coating stripped road surfaces with a new surface material constituted by a mixture of material previously stripped from the road and a new material, comprising:
a vehicle including a chassis and a drive motor;
a supply container for the new material carried by said chassis at a front region thereof;
a plank-type finisher for applying the new surface mater-ial carried by said chassis at a rear region thereof; and a mixing device carried by said chassis between said ; supply container and said plank-type finisher, the improvement comprlsing:
said mixing device comprises a housing in which a pair of rotatable mixers are arranged, said housing having an underside region which opens in opposed relationship to the road surface, said housing b~ing provided with a first filling opening at an upper side region thereof adapted to receive material transported B
.
When renewing road surfaces damaged by atmospheric influences or by a hiyh density of vehicles, the road surface is first milled or peeled and when the milled-away or peeled-off material has been removed, a new coating is applied. In the course of the milling or peeling as well as in the course of the application the new coating the milled or peeled road surface may be subjected to heating which ~oth simplifies the milling or peel-ing and provides for a better adhesion of the new coating on the exposed substrate. The milled or peeled material is loaded onto trucks and transported to dumping sites.
In order to keep repair costs per unit road length as low as possible, the milled or peeled material is, in accordance with a prior suggestion, not transported to a dumping site but is rather reemployed for the coating of the milled or peeled road ~; 20 surface. According to this method (the so-called recycling method) the milled or peeled material is mixed together with the new coat-ing material in a ratio conforming to the corresponding require-ments and this mixture is then applied onto the milled or peeled ;~ road surface.
In prior art machines for coating milled or peeled road surfaces, mixing of the milled or peeled material with the new ~; coating material is performed in a separate process and the mater-ial mixture is subsequently transported by a truck to the storage :
3~36Z4 or supply container of the coating machine. Although the mending costs per unit road length may be lowered considerably by this procedure as compared to the prior art methods, relatively high transport efforts are still necessary causing correspondingly high costs.
The present invention is intended to overcome this dis-advantage. It is therefore the aim of the present invention so to improve the prior art machines for coating millad or stripped road surfaces that the application of the new coatiny in accor-dance with the recycling method may readily be performed.
The invention provides in apparatus for coating stripped road surfaces with a new surface material constituted by a mixture of material previously stripped from the road and a new material, comprising:
a vehicle including a chassis and a drive motor;
a supply container for the new material carried by said chassis at a front region thereof;
a plank-type finisher for applying the new surface mater-ial carried by said chassis at a rear region thereof; and a mixing device carried by said chassis between said ; supply container and said plank-type finisher, the improvement comprlsing:
said mixing device comprises a housing in which a pair of rotatable mixers are arranged, said housing having an underside region which opens in opposed relationship to the road surface, said housing b~ing provided with a first filling opening at an upper side region thereof adapted to receive material transported B
.
2~
from said supply container and a second filling opening in the area of the underside region thereof adapted to receive the mater-ial previously stripped from the road;
first transport means for transporting material at a selectively variable rate from said supply container into said mixing device housing through said first filling opening; and shoving and conducting sheets for collecting material previously stripped from the road and guiding the same into said mixing device housing through said second filling opening.
It is especially advantageous if the milled or peeled-off material of the road surface is mixed with the new road coating material and, if necessary, additional additives on the road sur-face and then is built into a new surface. In this way it is sufficient to collect the material distributed over the road sur-face with the aid of the shoving and conducting sheets or similar equipment, and to mix it with the new material and to redistribute.
The difficult process of the collecting of the milled or peeled-off material from the road surface and the new application on the road surface are completely eliminated. The transport costs are reduced as only the new material has to be transported to the coat-ing machine. No removal of milled or peeled material will be necessary since it remains on the milled or peeled surface until it is taken up by the coating machine and fed to the mixing device.
A particular advantage of the invention is se~n in that the mixing ratio of milled or peeled material and of the new material may be adjusted on the site so that an optimum adaptation of the mixing ratio to the substrate, to different milling depths, different composition of the milled or peeled material and other locally
from said supply container and a second filling opening in the area of the underside region thereof adapted to receive the mater-ial previously stripped from the road;
first transport means for transporting material at a selectively variable rate from said supply container into said mixing device housing through said first filling opening; and shoving and conducting sheets for collecting material previously stripped from the road and guiding the same into said mixing device housing through said second filling opening.
It is especially advantageous if the milled or peeled-off material of the road surface is mixed with the new road coating material and, if necessary, additional additives on the road sur-face and then is built into a new surface. In this way it is sufficient to collect the material distributed over the road sur-face with the aid of the shoving and conducting sheets or similar equipment, and to mix it with the new material and to redistribute.
The difficult process of the collecting of the milled or peeled-off material from the road surface and the new application on the road surface are completely eliminated. The transport costs are reduced as only the new material has to be transported to the coat-ing machine. No removal of milled or peeled material will be necessary since it remains on the milled or peeled surface until it is taken up by the coating machine and fed to the mixing device.
A particular advantage of the invention is se~n in that the mixing ratio of milled or peeled material and of the new material may be adjusted on the site so that an optimum adaptation of the mixing ratio to the substrate, to different milling depths, different composition of the milled or peeled material and other locally
-3-~3~)6X~
different requirements is possible.
In accordance with an advantageous embodiment of the invention, the first transport means is a conveyor belt one end of which is under a discharge opening of the supply container and the other end of which is above the filling opening of the mixing device. A further advantageous embodiment is seen in that the first transport means is a screw conveyor comprising a conveyor worm provided in a tube extending from the discharge opening of the supply container to the first filling opening of the mixing device. Such an embodiment has the advantage as compared to the first described one, that there is a more uniform transport of the material from the supply container to the mixing device and there-fore the mixture comprising the material from the supply container and the milled or peeled material from the road surface may more precisely be adjusted. This is essentially due to the fact that the screw conveyor effects transport even if the material in the storage container becomes clotty while the belt of a belt conveyor would run empty in such a case. It is a slight disadvantage that maintenance costs are higher for a screw conveyor than for a belt 2C conveyor and there is particularly the danger that the screw con-veyor might become clogged. Which of the two conveyors is to be employed in the end, will have to be described with a view to the requirements.
For precise adjustment of the mixing ratio of the material transported from the supply container and of the milled or peeled material, it is most suitable to provide a conveyor of variable " ~i;3~624 conveying speed. By increasing or decreasing the conveying speed, if the discharge from the supply container is uniform, the amount of the material transported to the mixing device may be enlarged or decreased. Another possibility lies in providing the supply container with a discharge opening of variable cross section.
It should be mentioned however that for such a discharge opening correct dosing is possible only above a certain transporting amount since, dependent from the flowing properties of the material, if the cross section of the opening is too small, uniform discharge will not be possible. It is also possible to provide in combina-tion a conveyor having variable conveying speed and a supply con-tainer having a discharge opening of variable opening cross sec-tion.
Depending on whether the milling or stripping device has assembled the milled or peeled material in the middle area of the treated road surface or whether it has left the milled or peeled material on the whole road surface being processed, the shoving and conducting sheets may either be restricted to the middle area or may extend over the total width of the road surface being treated. In order to also gather small-grained milled or peeled material, it is recommended to provide brooms in the range of the shoving and conducting sheets. Worm shaped brooms rotating around the longitudinal axis thereof are found to be particularly suit-able.
~-The second filling opening for entry of the milled or peeled material to the mixing device is so shaped that the mater-ial already in the mixing device cannot leave through it. To this end, a projection may be provided in the interior of the housing of the mixing device above the second filling opening which passes the flow of material directed from top to bottom along the opening.
The housing of the mixing device has an underside open to the road surface and forms with the road surface~ an almost closed mixing chamber where however the material being mixed may, to a certain extent, escape between the lower edge of the housing and the road surface. If in accordance with an advantageous further development the mixing device is vertically adjustable on the chassis, the spacing of the underside of the housing of the mix-ing device to the road surface, and thus the thickness of the layer of material emerging from the interior space of the mixing device, may be adjusted. If further on the mixing device is tiltingly secured around an essentially perpendicular axis to the chassis, the width of the track of material may, by correspondingly tilting the mixing device, be adjusted within wide ranges.
~.' 6~
It is obvious that the mixing devices of other types could be employed as well such as a common drum mixer including a mixing drum rotating around a horizontal shaft. Particularly in case of such a drum mixer, the charging with the material collected on the road surface is not so simple since charging should be performed at the upper edge of the drum and the material must therefore be transported by means of a further transport ; device from the road surface level to the level of the upper edge of the drum. All the other mixing devices have in common the dis-advantage that a particular discharge opening for the mixed material has to be provided which, as has been found, might easily get clogged. ThiS is not the case in a mixing device - having an underside open on the road surface.
For vertical adjustment of the mixing device and also for tilting it around an essentially perpendicular axis, hydraulic servomotors are suitably provided. As compared to electric or pneumatic servomotors, these have the advantage that they may be incorporated into the hydraulic systems already provided on the machine.
It has been found desirable to provide a liquid gas driven heating device for heating the milled or peeled road surface ahead of the milling device in the travelling direction. By this heating device, the milled or peeled road surface may be heated on one side, which brings about, as has been mentioned above, an improve-ment of the adhesion of the new road coating to the milled or peeled surface. The heating of the milled or peeled material prior to, or in the course of, the mixing process, if desired together with the material transported from the storage container ;. ' ~L3~!62~
to the mixing device, leads to particularly favorable mixing ratios. The latter may be improved only by the heating device being secured to the mixing device and the heat generated by the heating device ~ay thus penetrate via the housing of the mixing device into the interior thereof.
The plank-type finisher distributes the coating material on the processed road surface behind the mixing device in travelling direction. Such a device is of particular advantage if and when mixing devices of a different type are employed instead of the aforementioned mixing device because in the former the uniformity of the discharge may be subjected to substantial variations. This finisher may however also be of advantage if in special cases the machine works without a mixer, i.e. only the material from the storage container is to be applied onto the milled or peeled and cleaned road surface. In that case, the material is passed from the storage container via the first con-veyor device into the mixing device which is in another position and through which the material drops directly to the milled or peeled surface. As the device distributing the coating material, a grading worm is provided.
The invention will now be explained in more detail based on the drawing which incluaes, partly in a schematic illustration, an exemplified embodiment.
~L13C~ 4 Figure is ~ si~ie view o~ a machin~ for coa ing rni.i~d or peeled road surfaces, Fl~ure ~? is a fr~nt view cf the mixt:ng device of the machine according to Figure 1, Figure 3 is a cr~s section of the ~ixing device according to Figure 2 along the line III~
Figure 4 iS a schematic side view of anoth~r mixing device according to the pres~nt invention, and Fi~ure 5 is a front view of this mi~:ing device according to ` 10 Figure 4.
The chassis 1 of the co~ting machine is provided with a steer-able front wheel pair 2 and a driven rear wheel pair 3. Tn the rear portion o~ cha~si~ 1, there is the driver's cabin 4 including a seat 5, a stearing wheel 6, and various operatin~ lever~ 7. In front of the driver'~ cabin, the drive motor 8 of the ~achine is locatsd.
In the fro~t portion of chassi~ 1~ a storage container 9 for thema,erial 10 to be applied i8 provlded. Storage container 9 includes a ~~ dischar~e opening 11~ the opening cross ~ection of which may be varied by means of a ~lide 72~ Below discharge opening 11~ there is one end of belt conveyor 13, ,lhich tran~ports th~ material 10 from the storage container 9 to a mixinz de~ic~ ~4~
~he mixin~ device 14 includer~ a central filling openin~ 15 for the m~terial 10 above ~hich th~ dischar~e end 1~ of belt conveyor 13 i8 ~rovidsd. The mixin~ device 14 comprise~ a hou~ing 17 supported in a hoLder 18 which on t8 part i~ connected to the movable part 19 o~
an hydraulic motor 20* By corrbspondin~ly controlling the hydraul~c , 9 ' motor 20, ..,lder 18, and thus ~he whole mixing d~vice, maV, be lifted and `owared and tilted around axis 21.
~ iousinl; 17 of t':e m.ixin~ ~levice 14 i6 open at its un~ersids ~o ~hat the mi~in~ sJJa¢e 22 i~ de~ined b,y the hou6in~ wall sn o~
side and b~ the ground ~urfac~ 23 on the other. In the interior ~2, tt~o mixing ~ollers ~4 and 25 votate in an oppoqing direction relatlve to each othi~r, Operition of ~he two mixing roll~rs 24 and 25 iB
performed by mean~ of a~ hydraulic motor 26 as well as a gear compris-in~ three tooth wheal6 279 28,~ and 29.
On the front sid~ of hou~.ng 17, there i8 an inlet aperture 30 for the mil.~ed or pe~.led material 31 on the ground ~urface 23. Thi~
ma~erial h~:~ already been as~embled in the middle range of the road surface to be proce~d ~:o that a shovii~g she0t 32 having a relatively small recepcion area is ~ufficient for rhe collection of the materialJ
In the interior 22 of houfiin~ 17, above opaning 30, there is a prc-je~tion 33, which keaps Iha material rotated in the interior 22 away from opening ~0, On the front ~i~e o r' the mixing de~lce 9 two heatin~ de~ices 34 and 35 are "urth~r'on pro~id~d ~'ed with liquid 6a~ from a liquid gas tank 36.
~etwee~l ~lanX~ aped finl,~.~hsr 37 loaded with a weight 38 and the rear wh--3el palr ',j there iæ a ~rader worm 39 by which the coatin~
material 4~ applied .,nto the ~oad surfa~,e to be treated i~ uniformly dijtrlbuteo ~heaa of ~,ne fini.~ner,.370 rhe m~er ~llu,~,~,rhted irl ~igure~ 4 and 5 is suitably mounted in parallel re.Lati~e to vrhe lon~.t,udinal a;~i6 of the machine 9 preferably " 'i [1 ~L~L3C~
in the middl. u~der t~e cha6sis 80 that the two mixing ro3.1er~ 41 ~nd 42 rotatf ~n parallal relat:7v~ to the longitudinal axis of the machine the .ormer being drlven by the hydraulic motor 4~ via a miter ~ear 44~ On the front side opposite to the hydraulic motor, the mi:~led material i~l ~ei~ed while the aggregates required for the production oi the de~ired road ;urface material are added via fill-ing openlng 45.
The materlals to be mixed ~-ass the mixer and escape from the front ~ide where the ~rive of the mixer rollers is locatedO
As shown ln Figure 5 in detail, the two m~xer shovels 41 and 42 are provided in a hou;in~ open ..o the road surface The mill~d material collec~ed by the shoving sheets arrives automaticallv into the reaction area of the two mixer shovels 41 and 42 and is in~imately mixed to~*ther with the aggregate filled via funnel 45 and i8 then~ after leaving the mixer, uniformly distributed over the mil~ed road .~urface by grader worm 39.
The distance relative to each other of the side walls 46 and 47 - of the mixer housing may be ad.~ted by means of worm-gear spindle 48 pro~ided with left and right-hand thread, respectively, and the 2~ appropriate ratche~ 4~ In thl~ ~ay, the mixing i.ntensity of the mixer may iniefinitely be vari~d~
:i
different requirements is possible.
In accordance with an advantageous embodiment of the invention, the first transport means is a conveyor belt one end of which is under a discharge opening of the supply container and the other end of which is above the filling opening of the mixing device. A further advantageous embodiment is seen in that the first transport means is a screw conveyor comprising a conveyor worm provided in a tube extending from the discharge opening of the supply container to the first filling opening of the mixing device. Such an embodiment has the advantage as compared to the first described one, that there is a more uniform transport of the material from the supply container to the mixing device and there-fore the mixture comprising the material from the supply container and the milled or peeled material from the road surface may more precisely be adjusted. This is essentially due to the fact that the screw conveyor effects transport even if the material in the storage container becomes clotty while the belt of a belt conveyor would run empty in such a case. It is a slight disadvantage that maintenance costs are higher for a screw conveyor than for a belt 2C conveyor and there is particularly the danger that the screw con-veyor might become clogged. Which of the two conveyors is to be employed in the end, will have to be described with a view to the requirements.
For precise adjustment of the mixing ratio of the material transported from the supply container and of the milled or peeled material, it is most suitable to provide a conveyor of variable " ~i;3~624 conveying speed. By increasing or decreasing the conveying speed, if the discharge from the supply container is uniform, the amount of the material transported to the mixing device may be enlarged or decreased. Another possibility lies in providing the supply container with a discharge opening of variable cross section.
It should be mentioned however that for such a discharge opening correct dosing is possible only above a certain transporting amount since, dependent from the flowing properties of the material, if the cross section of the opening is too small, uniform discharge will not be possible. It is also possible to provide in combina-tion a conveyor having variable conveying speed and a supply con-tainer having a discharge opening of variable opening cross sec-tion.
Depending on whether the milling or stripping device has assembled the milled or peeled material in the middle area of the treated road surface or whether it has left the milled or peeled material on the whole road surface being processed, the shoving and conducting sheets may either be restricted to the middle area or may extend over the total width of the road surface being treated. In order to also gather small-grained milled or peeled material, it is recommended to provide brooms in the range of the shoving and conducting sheets. Worm shaped brooms rotating around the longitudinal axis thereof are found to be particularly suit-able.
~-The second filling opening for entry of the milled or peeled material to the mixing device is so shaped that the mater-ial already in the mixing device cannot leave through it. To this end, a projection may be provided in the interior of the housing of the mixing device above the second filling opening which passes the flow of material directed from top to bottom along the opening.
The housing of the mixing device has an underside open to the road surface and forms with the road surface~ an almost closed mixing chamber where however the material being mixed may, to a certain extent, escape between the lower edge of the housing and the road surface. If in accordance with an advantageous further development the mixing device is vertically adjustable on the chassis, the spacing of the underside of the housing of the mix-ing device to the road surface, and thus the thickness of the layer of material emerging from the interior space of the mixing device, may be adjusted. If further on the mixing device is tiltingly secured around an essentially perpendicular axis to the chassis, the width of the track of material may, by correspondingly tilting the mixing device, be adjusted within wide ranges.
~.' 6~
It is obvious that the mixing devices of other types could be employed as well such as a common drum mixer including a mixing drum rotating around a horizontal shaft. Particularly in case of such a drum mixer, the charging with the material collected on the road surface is not so simple since charging should be performed at the upper edge of the drum and the material must therefore be transported by means of a further transport ; device from the road surface level to the level of the upper edge of the drum. All the other mixing devices have in common the dis-advantage that a particular discharge opening for the mixed material has to be provided which, as has been found, might easily get clogged. ThiS is not the case in a mixing device - having an underside open on the road surface.
For vertical adjustment of the mixing device and also for tilting it around an essentially perpendicular axis, hydraulic servomotors are suitably provided. As compared to electric or pneumatic servomotors, these have the advantage that they may be incorporated into the hydraulic systems already provided on the machine.
It has been found desirable to provide a liquid gas driven heating device for heating the milled or peeled road surface ahead of the milling device in the travelling direction. By this heating device, the milled or peeled road surface may be heated on one side, which brings about, as has been mentioned above, an improve-ment of the adhesion of the new road coating to the milled or peeled surface. The heating of the milled or peeled material prior to, or in the course of, the mixing process, if desired together with the material transported from the storage container ;. ' ~L3~!62~
to the mixing device, leads to particularly favorable mixing ratios. The latter may be improved only by the heating device being secured to the mixing device and the heat generated by the heating device ~ay thus penetrate via the housing of the mixing device into the interior thereof.
The plank-type finisher distributes the coating material on the processed road surface behind the mixing device in travelling direction. Such a device is of particular advantage if and when mixing devices of a different type are employed instead of the aforementioned mixing device because in the former the uniformity of the discharge may be subjected to substantial variations. This finisher may however also be of advantage if in special cases the machine works without a mixer, i.e. only the material from the storage container is to be applied onto the milled or peeled and cleaned road surface. In that case, the material is passed from the storage container via the first con-veyor device into the mixing device which is in another position and through which the material drops directly to the milled or peeled surface. As the device distributing the coating material, a grading worm is provided.
The invention will now be explained in more detail based on the drawing which incluaes, partly in a schematic illustration, an exemplified embodiment.
~L13C~ 4 Figure is ~ si~ie view o~ a machin~ for coa ing rni.i~d or peeled road surfaces, Fl~ure ~? is a fr~nt view cf the mixt:ng device of the machine according to Figure 1, Figure 3 is a cr~s section of the ~ixing device according to Figure 2 along the line III~
Figure 4 iS a schematic side view of anoth~r mixing device according to the pres~nt invention, and Fi~ure 5 is a front view of this mi~:ing device according to ` 10 Figure 4.
The chassis 1 of the co~ting machine is provided with a steer-able front wheel pair 2 and a driven rear wheel pair 3. Tn the rear portion o~ cha~si~ 1, there is the driver's cabin 4 including a seat 5, a stearing wheel 6, and various operatin~ lever~ 7. In front of the driver'~ cabin, the drive motor 8 of the ~achine is locatsd.
In the fro~t portion of chassi~ 1~ a storage container 9 for thema,erial 10 to be applied i8 provlded. Storage container 9 includes a ~~ dischar~e opening 11~ the opening cross ~ection of which may be varied by means of a ~lide 72~ Below discharge opening 11~ there is one end of belt conveyor 13, ,lhich tran~ports th~ material 10 from the storage container 9 to a mixinz de~ic~ ~4~
~he mixin~ device 14 includer~ a central filling openin~ 15 for the m~terial 10 above ~hich th~ dischar~e end 1~ of belt conveyor 13 i8 ~rovidsd. The mixin~ device 14 comprise~ a hou~ing 17 supported in a hoLder 18 which on t8 part i~ connected to the movable part 19 o~
an hydraulic motor 20* By corrbspondin~ly controlling the hydraul~c , 9 ' motor 20, ..,lder 18, and thus ~he whole mixing d~vice, maV, be lifted and `owared and tilted around axis 21.
~ iousinl; 17 of t':e m.ixin~ ~levice 14 i6 open at its un~ersids ~o ~hat the mi~in~ sJJa¢e 22 i~ de~ined b,y the hou6in~ wall sn o~
side and b~ the ground ~urfac~ 23 on the other. In the interior ~2, tt~o mixing ~ollers ~4 and 25 votate in an oppoqing direction relatlve to each othi~r, Operition of ~he two mixing roll~rs 24 and 25 iB
performed by mean~ of a~ hydraulic motor 26 as well as a gear compris-in~ three tooth wheal6 279 28,~ and 29.
On the front sid~ of hou~.ng 17, there i8 an inlet aperture 30 for the mil.~ed or pe~.led material 31 on the ground ~urface 23. Thi~
ma~erial h~:~ already been as~embled in the middle range of the road surface to be proce~d ~:o that a shovii~g she0t 32 having a relatively small recepcion area is ~ufficient for rhe collection of the materialJ
In the interior 22 of houfiin~ 17, above opaning 30, there is a prc-je~tion 33, which keaps Iha material rotated in the interior 22 away from opening ~0, On the front ~i~e o r' the mixing de~lce 9 two heatin~ de~ices 34 and 35 are "urth~r'on pro~id~d ~'ed with liquid 6a~ from a liquid gas tank 36.
~etwee~l ~lanX~ aped finl,~.~hsr 37 loaded with a weight 38 and the rear wh--3el palr ',j there iæ a ~rader worm 39 by which the coatin~
material 4~ applied .,nto the ~oad surfa~,e to be treated i~ uniformly dijtrlbuteo ~heaa of ~,ne fini.~ner,.370 rhe m~er ~llu,~,~,rhted irl ~igure~ 4 and 5 is suitably mounted in parallel re.Lati~e to vrhe lon~.t,udinal a;~i6 of the machine 9 preferably " 'i [1 ~L~L3C~
in the middl. u~der t~e cha6sis 80 that the two mixing ro3.1er~ 41 ~nd 42 rotatf ~n parallal relat:7v~ to the longitudinal axis of the machine the .ormer being drlven by the hydraulic motor 4~ via a miter ~ear 44~ On the front side opposite to the hydraulic motor, the mi:~led material i~l ~ei~ed while the aggregates required for the production oi the de~ired road ;urface material are added via fill-ing openlng 45.
The materlals to be mixed ~-ass the mixer and escape from the front ~ide where the ~rive of the mixer rollers is locatedO
As shown ln Figure 5 in detail, the two m~xer shovels 41 and 42 are provided in a hou;in~ open ..o the road surface The mill~d material collec~ed by the shoving sheets arrives automaticallv into the reaction area of the two mixer shovels 41 and 42 and is in~imately mixed to~*ther with the aggregate filled via funnel 45 and i8 then~ after leaving the mixer, uniformly distributed over the mil~ed road .~urface by grader worm 39.
The distance relative to each other of the side walls 46 and 47 - of the mixer housing may be ad.~ted by means of worm-gear spindle 48 pro~ided with left and right-hand thread, respectively, and the 2~ appropriate ratche~ 4~ In thl~ ~ay, the mixing i.ntensity of the mixer may iniefinitely be vari~d~
:i
Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In apparatus for coating stripped road surfaces with a new surface material constituted by a mixture of material previously stripped from the road and a new material, comprising:
a vehicle including a chassis and a drive motor;
a supply container for the new material carried by said chassis at a front region thereof;
a plank-type finisher for applying the new surface material carried by said chassis at a rear region thereof; and a mixing device carried by said chassis between said supply container and said plank-type finisher, the improvement comprising:
said mixing device comprises a housing in which a pair of rotatable mixers are arranged, said housing having an underside region which opens in opposed relationship to the road surface, said housing being provided with a first filling opening at an upper side region thereof adapted to receive material transported from said supply container and a second filling opening in the area of the underside region thereof adapted to receive the mater-ial previously stripped from the road;
first transport means for transporting material at a selectively variable rate from said supply container into said mixing device housing through said first filling opening; and shoving and conducting sheets for collecting material previously stripped from the road and guiding the same into said mixing device housing through said second filling opening.
a vehicle including a chassis and a drive motor;
a supply container for the new material carried by said chassis at a front region thereof;
a plank-type finisher for applying the new surface material carried by said chassis at a rear region thereof; and a mixing device carried by said chassis between said supply container and said plank-type finisher, the improvement comprising:
said mixing device comprises a housing in which a pair of rotatable mixers are arranged, said housing having an underside region which opens in opposed relationship to the road surface, said housing being provided with a first filling opening at an upper side region thereof adapted to receive material transported from said supply container and a second filling opening in the area of the underside region thereof adapted to receive the mater-ial previously stripped from the road;
first transport means for transporting material at a selectively variable rate from said supply container into said mixing device housing through said first filling opening; and shoving and conducting sheets for collecting material previously stripped from the road and guiding the same into said mixing device housing through said second filling opening.
2. The combination of claim 1 further including means for adjusting the height of said mixing device on said chassis.
3. The combination of claim 1 wherein said mixing device is pivotally secured to said chassis about a substantially vertical axis.
4. The combination of claim 1, 2 or 3 wherein said supply container has a discharge opening provided therein and wherein said first transport means comprises a belt conveyor, one end of said belt conveyor being situated under said discharge opening and the other end of said belt conveyor being situated over said first filling opening of said mixing device.
5. The combination of claim 1, 2 or 3 wherein said supply container has a discharge opening provided therein and wherein said first transport means comprises a worm conveyor including a conveyor screw located within a tube, one end of said worm con-veyor being situated under said discharge opening and the other end of said worm conveyor being situated over said first filling opening of said mixing device.
6. The combination of claim 1, 2 or 3 wherein said supply container has a discharge opening which is variable in its opening size.
7. The combination of claim 1 further including heating means located forwardly of said mixing device in the direction of travel of said vehicle for heating the material previously stripped from the road prior to it being guided into said mixing device.
8. The combination of claim 7 wherein said heating means are secured to said mixing device in a manner such that the heat generated thereby is transferred through the mixing device housing into the interior thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA354,894A CA1130624A (en) | 1980-06-26 | 1980-06-26 | Process and machine for coating milled or peeled road surfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA354,894A CA1130624A (en) | 1980-06-26 | 1980-06-26 | Process and machine for coating milled or peeled road surfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1130624A true CA1130624A (en) | 1982-08-31 |
Family
ID=4117278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA354,894A Expired CA1130624A (en) | 1980-06-26 | 1980-06-26 | Process and machine for coating milled or peeled road surfaces |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1130624A (en) |
-
1980
- 1980-06-26 CA CA354,894A patent/CA1130624A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |