Control method for hot air joint heater

Abstract

[Problem] To provide a method for controlling a hot air joint heater that can easily control the hot air temperature, hot air volume, and air pressure, and that can improve joining productivity of asphalt joints. [Solution] An ON / OFF circuit for a spark-plug ignition 23 and a timer relay circuit 24 are connected to a first relay circuit 20, and a temperature controller 26 is also connected thereto via an open / close relay circuit of a gas valve 27. Furthermore, supplying and stopping gas to a side heater 11 and ignition of the spark plug are performed only by turning at least one toggle switch 18 on and off, and opening / closing operation of the gas valve 27 is automatically controlled by a signal from the temperature controller 26.

Description

[Technical field]

[0001] The present invention relates to a hot air joint heater used in the work of spreading and leveling an asphalt mixture on a road surface, and in particular to a control method thereof. [Background technology]

[0002] The surface and base layers of asphalt pavement are formed using asphalt mixtures manufactured under appropriate temperature and quality control. The method of heating and leveling this asphalt mixture can be done manually or by machine, depending on the scale and type of work, but currently most work is done by machine, using a specialized machine called an asphalt finisher.

[0003] In general, asphalt layer construction involves supplying the asphalt mixture transported by dump truck to an asphalt finisher, which spreads and levels it to obtain the specified finished width and thickness. The temperature of the asphalt mixture during spreading and leveling must not fall below approximately 110°C, and the asphalt finisher must be operated as continuously as possible at a constant speed to ensure smoothness.

[0004] In addition, when applying a surface layer of asphalt mixture over a base layer of asphalt mixture, an emulsion called a tack coat is sprayed to improve adhesion between the layers.

[0005] An asphalt finisher is a self-propelled machine that consists of a hopper that stores the asphalt mixture, a tractor unit with a motor and running gear, and a screed that spreads the asphalt mixture. The asphalt mixture is stored in the hopper, and sent to the front of the screed at the rear by a bar feeder at the bottom of the hopper, where it is spread to the left and right by a screw, and then spread to the right and left by the screed. At that time, the angle of the screed is changed to adjust the thickness of the asphalt mixture to be spread, and the width of the screed is expanded and contracted to the left and right to adjust the spreading width (width). To repair an asphalt road surface, the road surface is heated in advance by a road surface heater to soften it, the road surface is scraped, and compaction work is performed.

[0006] For example, Patent Document 1 proposes a method in which the edge of the existing asphalt pavement for the first lane, which will be the joint, is heated while the asphalt mixture that will become the asphalt pavement for the second lane is laid out evenly. In this method, microwaves are irradiated onto the edge of the asphalt using a joint heating device equipped with a magnetron to heat the edge to an appropriate temperature, and the asphalt mixture is then laid out evenly.

[0007] Also, as a device for spreading and leveling an asphalt mixture on an underlying road surface such as an unpaved roadbed, an asphalt pavement body or its cut surface, or a concrete pavement surface, a traveling vehicle is equipped with a hopper for storing the asphalt mixture, an asphalt mixture delivery device, an emulsion spray nozzle, and a screed, and while spraying the emulsion on the underlying road surface with the spray nozzle, the asphalt mixture is delivered from the hopper and spread and leveled with the screed (see Patent Document 2). Also, a road heater for paving work for melting a frozen roadbed or roadbed is composed of a rolling roller that is supported by a movable work machine and is supported by a shaft, holes drilled around the roller for blowing hot air from the internal space to the outside, a heating device disposed toward the internal space of the roller, and a heat insulating cover that is wrapped around the roller except for the lower part of the rolling surface with a required gap (see Patent Document 3).

[0008] The paving and leveling machine disclosed in Patent Document 1 makes it possible to perform asphalt paving at low cost overall without using an asphalt distributor, which is a vehicle dedicated to spreading emulsion.

[0009] However, the above-mentioned conventional asphalt mixture spreading machines are only equipped with an emulsion spray nozzle and auxiliary equipment such as a pump that pressure-transfers the emulsion to the nozzle and an emulsion tank, and therefore have the problem that the decomposition speed of the sprayed emulsion is affected by the outside temperature and wind, which ultimately affects the adhesive strength of the emulsion. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] JP 2004-143826 A [Patent Document 2] Japanese Patent Application Publication No. 4-203006 [Patent Document 3] JP 2016-75043 A [Patent Document 4] Utility Model Registration No. 3212830 Summary of the Invention [Problem to be solved by the invention]

[0011] In addition, the above-mentioned conventional heating devices had the drawback that the road surface could not be heated deep enough, and the asphalt that was scraped off was immediately cooled, resulting in an insufficient temperature for the subsequent compaction process. To solve this drawback, it was necessary to heat the road surface sufficiently, but this caused another problem of delays in repair work due to the heating work.

[0012] Currently, the mainstream method of construction of asphalt joints is to use direct-fire joint heaters and handle burners attached to the side of the asphalt finisher. This causes the mixture to solidify while waiting for the mixture dump truck and while pulling the mixture by hand, which reduces work efficiency, especially in winter. In addition, the bonding of the road joints is poor, so defects such as cracks appear immediately after the paving work is completed.

[0013] Direct-fire joint heaters are attached to the side of the asphalt finisher, but the heaters are heavy, and attaching and removing them takes time and effort, requiring a great deal of effort from the worker. In addition, hand burners cause discoloration of the asphalt pavement surface because the flame hits the surface directly. Furthermore, depending on where the burner is attached to the finisher, the hand burner may move due to vibrations, etc., and the worker's clothes may catch fire, creating safety issues. In addition, the flame is weak, making it difficult to join the joints.

[0014] Conventionally, there has been a method in which a heating device is provided immediately after the road surface scraping device, but this method has problems in that the equipment costs are high and sufficient heating temperature cannot be obtained, so the present inventor previously proposed a hot air type joint heater in Patent Document 4. This hot air type joint heater is equipped with a hot air generating device including a gas burner and an air blower, and is composed of a front heater provided with multiple hot air outlets directed to the road surface, and a pipe-shaped side heater connected to a hot air duct that blows hot air from the hot air generating device and provided with multiple hot air outlets directed to the road surface, and is mounted on a self-propelled asphalt finisher, and the amount of heat required for scraping is applied to the scraping position and to the asphalt immediately after scraping, so that road surface repair can be performed quickly by applying the amount of heat required for subsequent processes such as compaction.

[0015] The present invention relates to an improvement to this hot air joint heater, and aims to provide a method for controlling a hot air joint heater that can easily control the hot air temperature, hot air volume, and air pressure, thereby increasing the joining productivity of asphalt joints. [Means for solving the problem]

[0016] For this reason, the present invention provides a control system for a hot air joint heater comprising a front heater (1) equipped with an air blower (4) including a gas burner (2) and an air blower (19) and provided with a plurality of hot air outlets (9) and hot air outlets (10) directed toward the road surface, and a pipe-shaped side heater (11) connected to a combustion tube (3) that blows hot air from the air blower (4) and provided with a plurality of hot air outlets (17) directed toward the road surface, the control system being mounted on a self-propelled asphalt finisher (AF) and blowing out hot air with the amount of heat required for subsequent processes such as compaction to the asphalt mixture at the scraping position and to the asphalt mixture immediately after scraping, the control system supplying propane gas as fuel from an LP gas cylinder (35) mounted on the asphalt finisher (AF) via a fixed stand (37), a hot air ejection pipe (14) of the side heater (11) is branched into a front duct pipe (14a) and a rear duct pipe (14b) so that hot air is ejected from the hot air ejection holes (17) of each of the front duct pipe (14a) and the rear duct pipe (14b); The hot air control circuit (30) controls the supply and stop of gas to the front heater (1) and the side heater (11), the ignition of the spark plug (6), and the supply of electricity to the blower fan (19) by only turning on and off at least one torque switch (18), and automatically controls the opening and closing operation of a gas valve (27) by an electromagnetic valve (28) based on a detection signal from a temperature controller (26), thereby controlling the temperature, volume, and pressure of the hot air to be within certain ranges. the hot air control circuit (30) is composed of at least an on / off relay circuit (20) for an ignition plug igniter (16) and an open / close relay circuit (21, 22) for a gas valve, and is connected to a start / stop switch line of an asphalt finisher (AF) so as to ignite when the asphalt finisher (AF) starts and to control the stop of gas supply when the asphalt finisher (AF) stops; The first feature is that the temperature of the hot air is detected by a thermocouple (32) and the amount of gas supplied to the gas burner (2) is adjusted to control the amount of combustion, and the temperature controller (26) automatically controls the front heater hot air outlet temperature and the side heater hot air outlet temperature to 150° C. to 300° C. The second feature is that a bifurcated coupler (38) is connected to the regulator (36) of the LP gas cylinder (35) to send gas to combustion tubes (strainers) (3) provided on the left and right sides of the asphalt finisher (AF).

[0017] The hot air joint heater of the present invention is configured as described above and has the following excellent effects: (1) Cold asphalt and warm asphalt do not mix, making it difficult for them to bond, but by heating them, the cold asphalt and warm asphalt can mix together, making them easier to bond, and preventing cracks at the joints in the asphalt pavement. (2) The material does not solidify because it is kept at a constant temperature by hot air even while the material is waiting to be transported by the dump truck or while it is being manually pulled. This also leads to a reduction in the time required for raking and other operations. (3) Hot air is distributed evenly using a blower instead of a direct flame, so discoloration of the asphalt surface does not occur. (4) Since it is not an open flame, it will not catch fire on the worker's clothes, etc., making it very safe. Because it is lightweight and compact, disassembly and installation can be done by one person in about five minutes. (5) Even when the outside temperature is low or the wind is strong, paving can be done well without being adversely affected by these conditions. (6) Not only can the underlying road surface be heated before the emulsion is applied, but even if the surface is wet with rain or other moisture, the moisture can be removed by heating, resulting in a better pavement. (7) Both the front heater and the side heater can be controlled automatically as well as manually. In particular, if the gas does not ignite when the asphalt finisher is started, the temperature controller does not detect the flame and stops the gas supply, making it safe. (8) The gas ignition switch and the starter switch are linked to make the unit easier to use. (9) The hot air temperature, air volume, air pressure, etc. can be accurately controlled within a certain range based on the detection signal from the hot air sensor. Furthermore, since manual adjustments are not required, the drying productivity of asphalt joints can be significantly improved. (10) Both the front heater and side heater can be easily attached and detached from the asphalt finisher body with a single bolt. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a front perspective view showing a state in which a hot air joint heater according to the present invention is attached to an asphalt finisher. [Diagram 2] FIG. 1 is a side perspective view showing a state in which a hot air joint heater according to the present invention is attached to an asphalt finisher. [Diagram 3] FIG. 1 shows a hot air heating device (front heater) of a hot air type joint heater according to the present invention, where (a) is a front view and (b) is a side view. [Figure 4] FIG. 2(b) is a bottom view of FIG. [Diagram 5] FIG. 2 is a schematic diagram showing a configuration of a side heater. [Figure 6] Schematic diagrams showing the appearance of the control box, (a) being a front view and (b) being a plan view. [Figure 7] FIG. 2 is a circuit diagram of a hot air joint heater control system according to the present invention. [Figure 8] FIG. 2 is an external plan view of the control box. [Figure 9] FIG. 11 is a side view showing another embodiment of the side heater. [Figure 10]FIG. 11 is a perspective view showing a schematic diagram of another embodiment of a hot air type joint heater according to the present invention. [Figure 11] FIG. 11 is a front view showing a schematic installation state of the hot air type joint heater shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. EXAMPLES

[0020] 1 to 4 show an embodiment of the hot air joint heater according to the present invention. The device of the present invention is used by attaching it to a self-propelled vehicle such as an asphalt finisher AF. An asphalt finisher is, for example, a self-propelled vehicle equipped with a hopper for storing the asphalt mixture, an asphalt mixture delivery device, an emulsion (asphalt) spray nozzle, and a screed, and while the emulsion is sprayed onto the unpaved roadbed with the spray nozzle, the asphalt mixture is delivered from the hopper by the delivery device onto the sprayed emulsion on the roadbed and spread evenly with the screed.

[0021] FIG. 1 and FIG. 2 are perspective views showing the appearance of a hot air joint heater according to the present invention, and each of the heaters includes a front heater 1, which is a hot air generating device including a gas burner 2. And, The hot air joint heater according to the present invention is generally composed of a side heater 11 and a heater 21. Air supply Blower Box 4 Outside air is drawn in from the open surface of the asphalt finisher, heated in the combustion tube 3 by the gas burner 2, and blown out as hot air into the joints of the asphalt road surface. It is also possible to impart the amount of heat required for scraping to the scraping position and to the asphalt immediately after scraping for the subsequent process of compaction. Both the front heater 1 and side heater 11 can be easily attached and detached to the asphalt finisher main body AF with a single bolt.

[0022] As shown in FIG. 2 to FIG. 4, the hot air generating device (front heater) 1 has a gas burner in a combustion tube 3. 2 is The hot air is stored in the air blower box 4 and communicates with the air blower box 4 having the air blower fan 19. Thermocouple 32 The amount of gas supplied to the gas burner 2 is adjusted to control the amount of combustion, and the temperature controller (described later) is also used. 15 A hot air control circuit that controls the hot air temperature up to a maximum of 350°C. (Control box)30 Equipped with.

[0023] As shown in FIGS. 3 and 4, a combustion tube 3 Haso Hot air is blown from a hot air blowing skirt box 7 installed below the asphalt road surface. A plurality of hot air blowing holes 9 and hot air blowing outlets 10 are formed in the bottom plate 8 of the hot air blowing skirt box 7, and the blown hot air heats the asphalt road surface immediately after it has been scraped apart.

[0024] As shown in FIG. 5, the side heater 11 is mounted on the burner mounting bracket (including a T-shaped socket) 13. Gas piping 5 A side gas burner 12 connected to the burner 11 is inserted and fixed at a desired position with a burner position fixing bolt 12a, and a hot air blowing pipe 14 having a plurality of hot air blowing holes 17 directed toward the road surface is connected to the lower left and right ends of the burner 12. Heat It is designed to blow air directly. The diameter of the hot air outlet hole 17 is preferably 0.5 mm to 10 mm, particularly preferably 0.7 mm to 0.8 mm, and can be adjusted appropriately depending on the working conditions.

[0025] The hot air joint heater of this embodiment configured as described above (fuel is propane gas: propane pressure 0.05 MPa, front hot air outlet temperature: 230°C, side heater hot air outlet temperature: 160°C-180°C. The emulsion is dried by the hot air (230°C) blown by the front heater. The propane gas fuel is supplied from the main gas tank of the asphalt fisher body, but since the pressure is 0.05 MPa, there is no need to adjust the amount, and it can be supplied without stress at the same gas pressure, and the gas combustion efficiency is improved, resulting in energy savings.

[0026] In this way, the hot air (160℃-180℃) blown from the side heater 11 softens the mix, improving the efficiency of the rake work and the finished surface of the paving joints. The mix does not cool down during paving work, while waiting for the mix, or when the finisher is stopped, and the mix can be kept soft even when restarting. Since there is no direct flame, the mix does not discolor.

[0027] In order to prevent deterioration of the asphalt, the appropriate hot air temperature is about 250° C. to 300° C. Depending on the outside air temperature and the condition of the asphalt, it is possible to use only one of the front heater 1 and the side heater 11, rather than using both.

[0028] FIG. 6 shows the control box 30 equipped with the hot air control circuit of the side heater 11, FIG. 7 shows the control system circuit, and FIG. 8 shows the external plan view. In the hot air control circuit, two torque switches 18 are connected to the power on / off circuit, the ignition on / off relay circuit 20 which is the first relay circuit, the open / close relay circuits 21 and 22 of the gas valve 27 which are the second and third relay circuits, and the power relay circuit of the air blower 4's air blower fan 19, and are also connected to the start / stop switch line of the asphalt finisher (vehicle). A fluid control solenoid valve (Multilex Valve: CKD GAB312-3-0-03A-DCV: ​​product name: manufactured by CKD Corporation) was used for the gas valve 27. In the figure, 32 is a thermocouple (measuring temperature difference), and the spark plug 6 is connected to the igniter 16.

[0029] That is, the first relay circuit 20 includes a timer relay in an on / off circuit of the ignition 23 for the spark plug. -2 4 is connected, and the gas valve 27 opening and closing relay circuit 21 and 22 Through the digital display 26 Temperature controller with 15 The gas supply to the side heater 11 can be started, stopped, and ignited simply by turning on / off at least one torque switch 18. The opening and closing operations of the gas valve 27 are controlled by a temperature controller 26.15 In the figure, 33 is a metal connector for the power supply, 33a is its cover, 34 is a gas supply coupler, and 34a is its cap.

[0030] In this embodiment, the spark plug 6 A solid-state timer H3N-2 (product name: manufactured by Omron Corporation) was used as the timer relay circuit 20 for linking the ignition and start / stop switches. 15 A mini power relay G2R-2-SD (product name: manufactured by Omron Corporation) was used as the gas valve opening / closing relay circuits 21 and 22, which are the second and third relay circuits connected to the temperature controller. 15 As the temperature controller, a digital PID temperature controller RKC C100KF02-V (product name: manufactured by Rika Kogyo Co., Ltd.) was used.

[0031] The hot air joint heater of this embodiment is a temperature controller 15 The opening and closing of the gas valve 27 is automatically controlled by the solenoid valve 28 in response to the detection signal, and the temperature, volume, and pressure of the hot air can be accurately controlled within a certain range, and since manual adjustment is not required, the drying productivity of the asphalt joints can be significantly improved. Also, for example, it is possible to control the volume and pressure of the hot air by adjusting the rotation speed of the air blower 4 air blower fan 19.

[0032] That is, For spark plugs Ignition No. 2 3, a gas ignition relay 20 and a gas valve 27 for controlling the supply of electricity to the For spark plugs Ignition No. 2 3 and a switch 18 that is linked to the start / stop of the asphalt finisher (vehicle), and the first relay circuit 20 for gas ignition, the second relay circuit 21 that controls the front heater, and the third relay circuit 22 that controls the side heater 11 are automatically linked by the operation of at least one switch, and the gas ignition switch For spark plugs Ignition No. 23 and Asphalt Finisher (vehicle) AF of It becomes easier to use when linked to the start / stop switch line.

[0033] When the gas burner ignition is automatically controlled, it is ignited when the Asphalt Finisher AF starts and extinguished when it stops, so there is no risk of forgetting to turn it off even when waiting for the mixture to be added.In addition, the gas supply is cut off when the machine is stopped, providing excellent safety. EXAMPLES

[0034] 9 to 11 show another embodiment of the device of the present invention. For convenience, the same components as those in the first embodiment are given the same reference numerals. In this embodiment, instead of the front heater 1 of the first embodiment, the hot air outlet pipe 14 of the side heater 11 is branched from the combustion tube 3 into a front duct pipe 14a and a rear duct pipe 14b, and hot air is respectively ejected from the hot air outlet holes 17, which contributes to making the entire device more compact.

[0035] In addition, propane gas, which serves as fuel, is supplied from an LP gas cylinder 35 mounted on the asphalt finisher AF via a fixed stand 37. A bifurcated coupler 38 is connected to a regulator 36 of the LP gas cylinder 35, and gas is sent to each of the left and right strainers 3. This configuration makes it easy to install and remove the entire device, and it can also be easily transferred to a different vehicle. [Industrial Applicability]

[0036] With the above configuration, hot air always hits the road surface even when the asphalt finisher is stopped, making the mixture soft and easy to work with. In addition, the emulsion (adhesive) in the joint heater and center joint is heated to the point of bubbling, which improves adhesion between the mixture and makes it less likely for cracks to occur in the center joint. Although the heat is sufficient, no flames come out of the joint heater, only hot air. Discoloration can be prevented because the flame does not hit the mixture directly.

[0037] In winter or in cold regions, the hot air joint heater can sufficiently heat the screed side temperature, the mixture at the corners of the side plate and moldboard is soft, and raking work on the left and right sides can be performed smoothly. There is no need to stop the asphalt finisher except when waiting for the mixture dump.

[0038] The hot air burner type applies hot air of 150℃ to 200℃ to the material to soften it, and because the material is not directly exposed to flames, it does not discolor the material. It also prevents malfunctions caused by flames.

[0039] The joint sides of the asphalt pavement surface, the screed side brake and under the steps are heated with hot air at 150℃~200℃, which softens the composite material at the corners of the moldboard, reduces snagging and damages to the pavement surface.

[0040] Even with poor quality materials (recycled materials, etc.), flexibility is maintained, and the entire material does not move as a unit during leveling with a rake, allowing for smooth work and reducing the workload of workers. Previously, the finisher had to be stopped temporarily when touch-up work was required, but with this system, paving work can continue without stopping, improving work efficiency and producing a neater finished pavement.

[0041] Like the center joint, the side joint can be either manual or automatically controlled. If the fire does not ignite when the vehicle starts moving, the controller will not detect the flame and the safety device will activate, cutting off the gas supply, making the vehicle safe. In this way, the asphalt joint can be heated at all times according to the present invention. In addition, the large heating area allows the joint to be softened sufficiently. This allows the repair speed to be increased, and labor can be saved by installing a front heater in the front, even in winter. [Explanation of symbols]

[0042] 1 Hot air heater (front heater) 2 Front gas burner 2a Gas ejection nozzle 3 Combustion tube (strainer) 4. Air Blower Box 5. Gas pipes or gas hoses 6 Spark plug 7 Hot Air Blowing Skirt Box 8 Bottom plate of skirt box 9 Hot air vent 10 hot air outlet 11 Side heater 12 Side gas burner 12a Burner position adjustment bolt 13 Burner mounting bracket (T-type socket) 14 Hot air outlet pipe 15 Temperature Controller 16 Igniter 17 Hot air vent 18 Torque switch 19. Air supply fan 20 1st relay circuit (timer relay circuit) 21 Second relay circuit 22 3rd Relay Circuit 23 Spark plug ignition 24 Timer Relay 25 Earth 26 Digital display panel for temperature controller 27 Gas Valve 28 Solenoid valve 29 Shielded enclosure 30 Control box (hot air control circuit) 31 High voltage lines 32 Thermocouple 33 Metal Connector 33a Connector cover 34 Coupler 34a coupler cap 35 LP gas cylinder 36 Regulator 37 Gas cylinder fixing stand 38 Two-way coupler AF Asphalt Finisher (vehicle)

Claims

1. The control system for a hot air joint heater comprises a front heater (1) equipped with an air blower (4) including a gas burner (2) and an air blower (19), and provided with a plurality of hot air outlets (9) and hot air outlets (10) directed toward the road surface, and a pipe-shaped side heater (11) connected to a combustion tube (3) that blows hot air from the air blower (4) and provided with a plurality of hot air outlets (17) directed toward the road surface, the control system being mounted on a self-propelled asphalt finisher (AF) and blowing out hot air with the amount of heat required for subsequent processes such as compaction to the asphalt mixture at the scraping position and to the asphalt mixture immediately after scraping, and the supply of propane gas as fuel is performed from an LP gas cylinder (35) mounted on the asphalt finisher (AF) via a fixed stand (37), The hot air ejection pipe (14) of the side heater (11) is branched into a front duct pipe (14a) and a rear duct pipe (14b) so that hot air is ejected from the hot air ejection holes (17) of each of the front duct pipe (14a) and the rear duct pipe (14b). The hot air control circuit (30) controls the supply and stop of gas to the front heater (1) and the side heater (11), the ignition of the spark plug (6), and the supply of electricity to the blower fan (19) by only turning on and off at least one torque switch (18), and automatically controls the opening and closing operation of a gas valve (27) by an electromagnetic valve (28) based on a detection signal from a temperature controller (26), thereby controlling the temperature, volume, and pressure of the hot air to be within certain ranges. The hot air control circuit (30) is composed of at least an on / off relay circuit (20) for an ignition plug igniter (16) and an open / close relay circuit (21, 22) for a gas valve, and is connected to a start / stop switch line of an asphalt finisher (AF) so that ignition occurs when the asphalt finisher (AF) starts and gas supply is stopped when the AF is stopped. The method for controlling a hot air joint heater is characterized in that the temperature of the hot air is detected by a thermocouple (32) and the amount of gas supplied to the gas burner (2) is adjusted to control the amount of combustion, and the front heater hot air outlet temperature and the side heater hot air outlet temperature are automatically controlled to 150°C to 300°C by the temperature controller (26).

2. A method for controlling a hot air joint heater as described in claim 1, characterized in that a two-way coupler (38) is connected to the regulator (36) of the LP gas cylinder (35) and gas is sent to combustion tubes (strainers) (3) installed on the left and right sides of the asphalt finisher (AF).

Images