DE1912884A1 - Device for mixing and applying coating materials - Google Patents

Description

Device for mixing and applying coating materials The invention relates to a device for distributing and spraying coating material and in particular improvements to an apparatus for spraying, lane or foaming of coating material sprayers have heretofore been used to apply coating materials apply rials; the named substances suitable for coating can be made from Plastic mass consist of relatively quick-reacting chemical Constituents exist. Ordinary sprayers, such as paint spray guns, are for these purposes, i.e. for applying plastic resin with quick mixing Reactive chexisollen components not suitable, While individual components are usually stable, they react when sedated to form what is to be achieved Product very quickly and finally take on a solid shape or begin to grow freeze. Care must therefore be taken that the individual Components are mixed in a suitable ratio and that the mixture is immediately is sprayed or applied. Attempts have been made to conventional To further develop paint spray guns in order to spray plastic materials can. The more developed pistols usually have a mixture chamber, while the individual components through individual feed lines of the mixture chamber be added in a precise mixing ratio so that the desired topping or the layer can be achieved. Devices of the kind developed in this way However, the design are not satisfactory in their mode of operation because it is not is possible to keep the device clean enough to prevent the Control valves and ducts become clogged with plastic. the Devices of the type mentioned were therefore except by clogging the channels Operation set.

The present invention is therefore intended to provide a device for applying a coating material are created, what by spraying, pouring or Foaming of the material can be seen, however precautions should be taken that the materials to be sprayed or mixed at a suitable temperature and that the control valves and ducts are kept so clean that that the device is ready for use at all times.

In particular, a device for applying coating materials is intended be created in which an improved valve control is used, to control the flow of the individual scaffolding components through the spray gun in such a way that that the device can be kept free of clogging components. The device should be able to be easily rinsed or washed with a solvent, without having to dismantle or remove the individual parts, which means that the device can be used at any time is operational, There should also be an application device or a sprayer for coating materials, such as plastic mass or the like, be created, with the ingredients to be mixed in separate from each other Feed lines are fed to a mixing chamber. The ingredients to be mixed can be returned to the storage tank or container at any time. The repatriation and controlling the temperature of one or more of the components is done by concentrically arranged supply lines and control valves interacting with them, with an outer conduit serving as a return to the temperature of the material in the inner supply line while the sprayer is not is used.

The flow of material in the feed line is through a adjustable valve controlled, which is adjustable so that the incoming Material diverted directly to the return line and thus to the storage container while the sprayer can be kept operational. They are control valves provided to the flow of material from the supply lines into a mixture chamber to control. The control valves are arranged in bores so that they can be opened at any time can be removed as complete units in order to clean or to repair.

The invention is explained with reference to the accompanying drawings.

Fig. 1 is a side view of a spray gun according to the present invention Invention; Figure 2 is a top plan view of the spray gun of Figure i; Fig. 3 is a Partial view of the front, i.e. the trigger side, of the spray gun of Figure 1; Fig. 4 is a rear view of the spray gun; Fig. 5 is a vertical sectional view from line 5-5 in Figure 2; Figure 6 is a sectional view taken on line 6-6 in Figure i; Figure 7 is a sectional view taken on line 7-7 in Figure 1; Fig. 8 is a sectional view on an enlarged scale from line 8-8 in Fig. i; FIG. 9 is similar to FIG. 8 Sectional view in which the parts are in a different position; Fig. 10 Fig. 10 is a sectional view taken on line IO-10 in Fig. 1; Fig. 11 is a sectional view from line 11-11 in FIG. 4 on an enlarged scale; Fig.12 is one of the Fig. Li Corresponding sectional view on an enlarged scale, in which the parts are in a different position; Fig.i3 is a partial sectional view similar to Fig. Ii, wherein the parts are in a further working position; and Figure 14 is a the Fig. Li similar sectional view in which the parts are again in a other work situation.

Referring to Figures 1-5 of the drawings, there is shown a spray gun which is particularly suitable for spraying a coating material, for example Plastic foam. This can be made of isocyanate resin and a poly resin with a suitable one Solvents exist, with compressed air being used as the driving medium. In the The embodiment shown, the spray gun is designed for spraying. With Slight changes or conversions can make the spray gun to Giesen or Foaming of the foam material can be used.

The spray gun shown has two body parts or

Sections, which consist of a head part 10 and a handle or a body provided with a multiple line li exist. The head 10 is attached to the surface 12 of the handle 11 in a suitable manner and has a nozzle 14, which through a connecting part 15 with a tubular portion 16 is connected. This forms a mixing chamber which is inserted into an incision 17 is screwed in. The incision represents the threaded inner end a bore 18 extending through the head 10. The bore 18 is with Completed with the aid of a plug body 19 at the rear end; the plug body 19 is screwed into said rear end with a thread.

The materials to be mixed to form a suitable covering or Coating are fed through feed lines 20 and 21. The lines 20 and 21 are through mating connectors with threaded holes at the lower end of the handgrifies 11 connected; they are thereby connected to channels 22 and 23, which extend upward to surface 12 of handgirt ii. The inner one Supply lines 20 and 29 are assigned to outer return lines 24 and 25. The inner diameter of this back lines is bigger than that Outside diameter of the inner lines 20 and 21, which in this way of the Return lines are surrounded. The outer return lines 24 and 25 are through matching Connecting pieces with the outer sections of enlarged diameter of those Bores in communication into which the inner supply lines 20 and 21 are fitted are. The return lines are thus connected to channels 26 and 27 in FIG Connection which are essentially parallel to the channels 22 and 23.

They extend to the surface 12 of the handle 11.

The channels 22, 26 and 23, 27 extend into the head part 10, where they are connected to horizontal bores 30 and 31 (Fig. 8). In the rear ends of the bores 30 and 31 are adjusting valves 32 and 33 for the flow. The channels are in one position of the adjusting valves 32 and 33 22 and 23 with the channels 26 and 27 in connection, so that the corresponding outer Return lines 24 and 25 accommodate and return the materials to the source. pass on without these spray materials via the adjustment valves 32 and 33 reach.

The return flow of the materials surrounds the supply lines.

Compressed air or some other suitable propellant is passed through the line 34 while a solvent is fed through the line 35. These Lines are connected to the lower ends of ducts by matching connectors 36 and 37 in the handle 10 in connection. The channels 36 and 37 extend to to surface 12 of the handle.

The air and solvent channels 36 and 37 extend through channels 36 'and 37' in the head part 10, where they nit the holes 30 and 31 and also with the transverse bore 38 (Fig. 7) are in connection. In the cross hole 38 is a valve 40 for the solvent 0 control valves 42 and 43 are located in the front parts of the holes 30 and 31. This front parts have a smaller cross-section than the rear parts, in which the adjusting valves 32 and 33 are located. Both the control valves as well as the rear adjustment valves for the flow are available as units or entire components can be removed in the axial direction.

The adjusting valves 32 and 33 are of the same construction, so that the Description can remain limited to one of the valves. The valve 32 has a rod-like, cylindrical body, which at its rear end has a reduced diameter portion 45. Section 45 is on the opposite sides flattened so that it fits through the fingers of the device person operating or by a tool can be taken to the body to rotate its axis in the bore 30. The body of the valve 32 is with an axially extending slot 46 formed on the periphery of the body is exposed.

In the position shown in Fig. 11 of the drawings, the slot a connection between the channels 22 and 26, whereby the supply of the material is cut off and the material through the channel 26 and from there to the return line 24 is returned. In this way the flow of the material to be sprayed will be prevented by other areas of the head part 10. The valve body has a axial bore 47, which extends from its innermost end to a radial bore 48 extends. This provides the connection in the position shown in FIGS. 12-14 with the feed channel 22, so that the material to be sprayed through the on L-shaped channel formed in this way is guided and at the innermost end of the valve body can be released. An axially extending slot 50 is in the plane of the L-shaped channel 47, 48 are provided at the innermost end of the valve body. He Figure 12 illustrates the connection to return conduit 26 as in Figure 12 of the drawings to see is. In this way the material to be sprayed can get into the return channel 26 when the inner end s adjusting valve 32 through the associated control valve 42 was not closed. At its inner end the valve body of the adjusting valve is cut off and forms a relatively narrow, inclined outer wall 51.

This represents a valve seat with a sohrag inner wall 52 at the inner end of the valve 42 cooperates when the valve 42 is inwardly within the bore 30 is moved. A spring-loaded projection or pin 53 is in a vertical bore located above the body of valve 32 and lies in radial Recesses in the valve body to the valve 32 in its set position keep. The valve body is equipped with a sealing ring at the extreme end, to avoid leakage losses.

The control valves 42 and 43 are of the same construction, which is why the description can be limited to one of the valves. The valve 42 has a sleeve-shaped body 55 which axially in the front end of the bore 30 is slidable. Sealing bodies 56 and 57 serve to avoid leakage losses. A valve plunger or

Piston 58 is arranged axially in the valve body or bushing body 55. The piston 58 is pressed into its innermost position by a compression spring 6t, in which it closes off the axial bore 60. The compression spring 61 surrounds one at the end located piston part 62 of reduced diameter.

The threaded outer part of the piston extends through an opening in an end plate 63 and carries a nut 64. On the outer circumference of the piston 58 is a groove 65, which is shown in Fig. ii-13 Location establishes a connection for the material to be sprayed, which through the Inlet opening 66 into the valve sleeve and from there through the groove to the outlet opening 67 got. The outlet opening 67 establishes the connection with the channel 68, which leads to the Bore 18 and from there to the mixing chamber 16 leads. The inlet port 66 is in the position of the piston 58 shown in Fig. li - 13, the connection with the channel 37 'ago. When the piston is withdrawn, the inlet opening 66 is in the position shown in FIG. 14 position shown closed, while the outlet opening 67 with the axial Channel 68 at the inner end of the valve sleeve 55 is in communication to the to be sprayed Direct material from the adjustment valve 32 into the channel 68 and from there to the mixing chamber 16 to be able to. The valve sleeve 55 is moved inward and brings the surface 52 in Engagement with the valve seat forming surface 51, as in Figs. 13 and 14 of the Drawings shown.

The valve pistons 58 are at their front ends by means of a bracket 70 (Fig. 8 and 9) connected to each other, while the valve sleeves 55 by a Spring plate 63 are in connection. The spring plate 63 has a stop finger 71, which is arranged so that it rests against the trigger 72 (FIGS. 5, 8 and 9). The middle part 73 of the bracket 70 is offset inwardly in the direction of the head part 10 arranged and rests against the upper end of a joint body 74. This is at 75 rotatable in an incision 76 in the front of the headboard and handle stored, the lower end of the joint member adjustable by the end of a arranged bolt 77 can be actuated. The bolt 77 is in turn on the trigger or arranged on the pusher 72. The trigger 72 has a two-part upper end with hook attachments 78 (Fig. 1 and 6), with which the trigger on laterally extending, with each other iluminating pivot 80 is rotatably mounted. A cover plate 8i from the reverse U-cross-sectional shape is rotatably mounted at 82 and can be pivoted upwards, to release the trigger from the pivot 80. That way you can the valves 42 and 43 quickly removed from the bores 30 and 31 and be cleaned. The trigger or trigger 72 can assume an inner layer, which is desirable for its locking. A latch is used for this purpose Bracket body 83 is provided rotatably mounted.

The valve 40 for the solvent is in the transverse bore 38 (Fig. 7) and is pressed into a rest position by means of a spring krait, as shown in 7 of the drawings. Extends from one end of the valve body a button 84 which can be actuated to axially move the valve body into a working position to move, in which the axially provided at a distance from one another, lying on the circumference Grooves 85 and 86 guide the channel 37 of the solvent through the extension 87 (Fig. 7) Connect to valves 42 and 43 to drain the solvent through the valves 42 and 43 to direct the mixing chamber 16 and through the nozzle 14 when the valves 42 and 43 are in the position shown in FIGS. 11-13. A channel 88 (Fig. 5) extends from the air duct 36 to the bore 18, where an aligned one on the circumference located groove 90 in the plug 19 and an axial bore establishing the connection 91 are provided at the inner end of the stop to air into the mixing chamber 16 and to be able to pass through the nozzle 14.

When the device shown in detail according to the present Invention for spraying a plastic foam is used first those to be mixed and sprayed through the nozzle 14 by a propellant Resin components supplied through lines 20 and 21 from their storage tank. The material to be sprayed is warmed or heated sufficiently to achieve the desired To achieve mixing. The manually operated adjusting valves 32 and 33 can be set so that the resin components or resin components to the storage containers returned without the control valves 42 and 43 happen as can be seen in Fig. Ii of the drawings.

When the spray gun for spraying or distributing the mixed If resin components are to be used, the adjusting valves 32 are first and 33 rotated into the position shown in FIG. When the trigger or trigger 72 is in its normal rest position, as shown in Figures 1 and 5 of the drawings As shown in solid lines, the valves 42 and 43 remain in the position shown in FIG Fig. 12 shown position. The resin components are therefore controlled by the adjusting valves 32 and 33 returned. This is the normal "off" position of the control valves 42 and 43. In this position of the valves 42 and 43, the solvent line 35, 37, 37 'opened to direct solvent through the valves and into the mixing chamber 16 so that the chamber is flushed out.

When the printer or print 72 is moved to the full "On'1" position, in which it can be held continuously by the bracket 83 are located the valves 42 and 43 in the position shown in FIG. Here is the piston 58 withdrawn by hinge member 74 (Figs. 5 and 9) while the valve sleeves 55 are closed at the ends of the adjustment valves 32 and 33, so that the resin materials through the adjusting valves 32 and 33 and through the control valves 42 and 43 to Mixing chamber 16 arrive. In this position of the valves 42 and 43, the solvent and air supply lines or channels 36t and 37 'closed by the pistons 58, while only the air line 88 is exposed to pressure medium for spraying the resin mixture to be able to feed through the nozzle 14. The air also helps with mixing of the mixture proportions located in bracket 15.

The pusher 72 can occupy a middle position, as indicated by dashed lines Lines shown in Figure 5 of the drawings. The control valves are in this position 42 and 43 moved to the position shown in Fig. 13 of the drawings, in which the piston 58 blocks the channel 68 at the end of the valve sleeve 55 and thus prevents that resin materials enter the valves 42 and 43. The air line 36 'and the solvent line 37 "will be opened, causing the channels through the valves 42 and 43 and the channels to the mixing chamber are flushed out immediately after the valves 42 and 43 have been opened to direct the resin components to the mixing chamber. In In this position, the solvent flush valve 40 can be actuated to clear the channels and rinse the mixing chamber.

The valves 42 and 43 are only by the trigger 72 in the Bores 30 and 31 held. When the pusher 72 is removed from the pivots 80 the valves 42 and 43 can easily be made as complete units the bores 30 and 31 are taken out in order to clean them or parts thereof to renew. The adjustment valves 32 and 33 are of course in the in Fig. 11 of the The position shown in the drawings is set when the control valves 42 and 43 taken out to prevent resin particles from getting into the holes 30 and 31 arrive. These can now in the manner shown to the storage containers or tanks are returned.

Although the device according to the present invention with reference was shown and described on a spray gun, the scope the device should not be limited solely to this. The device according to the invention can also be used for pouring or foaming processes. When pouring it is required to remove the spray can and she by a smooth Replace pouring spout (not shown). This can be a motor-driven agitator have to mix the plastic components.

Another mixing head is used for foaming; this one points a helical coil or winding to distribute the foam material. The trigger or trigger 72 can also be controlled by another switching arm, which has a cam control works to be replaced. The handle or

provided with a multiple line handle part 11 can by a Bracket or fastening part can be replaced in order to fix it to the wall or to enable a stationary arrangement.

Claims (16)

PATENT CLAIMS: Device for mixing and applying coating materials with a handle, a mixture chamber in the body of the device, one of the Mixture chamber derived nozzle and with channels leading to the mixture chamber, thereby characterized in that supply lines (20, 21) for the components to be mixed are connected to the handle (11) and with the ends of the channels (22, 23) in Are connected that in one of the channels a bore and a valve (42, 43) are provided in the bore to the flow of the individual material components to control the mixture chamber (16) that an associated control valve (32, 33) for the flow in the bore (30, 31) it is provided that at least one of the Feed lines are arranged in an outer return line (24, 25) that the control valve (32, 33) is adjustable in the bore and has channels, which in one position the connection from the supply line to the valve (42, 43) Establish a connection between the feed line while in another position (22, 23) and the associated back line (26, 27) is made, whereby the Feed of the material to the valve (42, 43) is interrupted, and that the material without passage recyclable through the valve and through the body (10) of the device to the container is. 2. Device for mixing and applying coating material with a body and a handle arranged thereon, with a mixture chamber inside the body and a discharge opening communicating with the mixture chamber, with supply lines for the components to be mixed, characterized in that, that channels in the body (10) lead to the mixture chamber (16) that the supply lines (21, 22) are connected to the handle (11) and with channels (22, 23) in the handle are in communication that part of the channels have a valve receiving bore comprises that a distribution valve is provided in the bore to regulate the flow of the material to determine the mixture chamber that an associated control valve is arranged in the bore to prevent the flow of material from one of the supply lines to control that the feed line has an external return line, which the supply line surrounds the associated control valve in the bore is adjustable to mix material from the feed line to the distribution valve to lead and to optionally establish a connection between the supply line and the Establish associated return line when the material from the supply line either to the distribution valve or back through the associated return line to the Reservoir should be performed without passing the distribution valve. 3. Device for mixing and applying coating material according to claim 2, characterized in that the control valve (32, 33) for the flow has a rod-shaped valve body which is rotatable in the Bore (30, 31) is mounted and an axially extending channel (46), which in one position of the valve body with the supply line communicating channels (22, 23) and the associated return lines (26, 27) connects to each other to return the material directly to the storage bin. 4. Device for mixing and applying coating material according to claim 2, characterized in that the control valve for the flow a rod-shaped body with an axially extending channel (47) therein has, which is exposed at the inner end and the connection with the supply line in a set position of the body establishes to the flow of the material from the supply to the associated distribution valve. 5. Device for mixing and applying coating material according to claim 4, characterized in that the associated distribution valve a having a cylindrical valve body which is displaceable in the axial direction in the bore and is adjustable to a position in which it connects to the inner end of the control valve establishes the flow, so that the material from the supply line passes through the control valve into the distribution valve. 6. Device for mixing and applying coating material according to claim 5, characterized in that the distribution valve is a piston (58) in the valve body, which can be moved into a position in which the The flow of material into the valve body is blocked. 7. Device for mixing and applying coating material according to claim 5, characterized in that the distribution valve inlet and Has outlet openings, which connect to a channel to the feed line for the solvent and the connection with a channel leading to the mixture chamber manufacture, and that a Piston movable in the distribution valve arranged and displaceable so that the flow of material from the solvent line or the flow of the material can be blocked by the control valve. 8. Device for mixing and applying coating material with a body on which a handle is arranged, with a mixture chamber in the body and with channels in the body leading from the handle to the mixture chamber lead, characterized in that feed lines to some of the channels in the Handle are connected to feed the ingredients to be mixed that other lines connected to some of the ducts to a pressure medium and to conduct a solvent through the channels to the mixture chamber that parts of the channels Bores for receiving valves form that control valves can be moved axially in the end parts of the holes are provided that a trigger mechanism for the Control valves is provided and has an arm body which is releasably attached to Body arranged and movable in the direction of the control valves and in by the Control valves facing away from the direction is movable that the arm body on Valve has adjacent part, which extends over the ends of the bores in which the valves are located, and that the valves as a unit in axial direction can be removed from the bore when the trigger arm of his Pivot points is removed to take out the valves. 9. Apparatus according to claim 8, characterized in that the valves each have a hollow, cylindrical valve body which is located within the bore is movable and has inlet and outlet lines which communicate with the supply lines and the channels that lead to Ge-ischkamser that a spring-loaded piston arranged displaceably in the valve body is and is normally in a position in which material from the solvent supply line is located is passed to the mixture chamber that a trigger lever rotatable between its ends is arranged near the outer end of the piston so that one end of the lever a at the outer end of the piston attached bracket touches to the piston in a position attributed in which the flow of material from the solvent supply line is blocked when the lever is turned by operating its opposite end its fulcrum is pivoted, with a device on the lever mechanism is provided, which at the end of the actuation cycle of the trigger on this intervenes. 10. The device according to claim 8, characterized in that the Valves each have a hollow, cylindrical valve body which is located in the valve bore is displaceable, and inlet openings and outlet openings has that one under Spring-loaded piston slidably provided in the valve body that a of the inlet openings is normally connected to a channel which leads to the solvent supply line and to the valve body results in the valve piston normally moving into position is to allow the flow of the solvent through the valve to the mixture chamber and that a solvent flush valve in a region of the channel between the connection with the solvent supply line is provided to the flow of the solvent through the control valve and into the mixture chamber. 11. The device according to claim 8, characterized in that the Propellant supply line is connected to a channel which leads directly to the Mixture chamber leads, with a side channel each to each bore for the control valve leads. 12. The device according to claim 11, characterized in that the Control valve has an inlet opening, which with the secondary channel in a Location of the valve connected to propellant with the solvent material to the mixture chamber to direct. 13. The device according to claim 8, characterized in that the Lever mechanism and the control valves work together to control the flow of the mixing components to control the mixture chamber and the flow of the Interrupt components while the control valves, the channels and the Mixture chamber flushed with a solvent from the solvent supply line will. 14. Device for mixing and applying coating material with a body and a handle arranged on the body, with a mixture chamber in the body and a discharge opening arranged thereon, with channels in the body, which lead to the mixture chamber, characterized in that supply lines for the ingredients to be mixed are provided within the handle and with Channels are connected that part of the channels have a bore and a lever-operated Have distribution valve in the bore, un the flow of ingredients to Mixture chamber to control that an associated control body for the flow is arranged adjustably in the bore that at least one of the supply lines is surrounded by an external return line that the control valve in the bore is adjustable to allow the flow of material from the feed line in one position to enable the associated control valve, while in another position the Flow of the material is led directly into the return line to the material without Return the passage of the control valve and the valve body to the reservoir. 15. Mixing and application device according to claim 14, characterized in that that the lever operated distribution valve with the flow control body in one position of the valve cooperates to control the flow of material from the supply line through the distribution valve and to block the material through the outer Return line to the storage tank. 16. Mixing and application device according to claim 14, characterized in that that the lever operated distribution valve has a hollow, cylindrical valve body which is axially movable in the bore, with an inlet opening on Inner end is aligned with an end opening in the associated control valve that the Control body for the flow is rotatably arranged in the bore, and has a channel which, in one position, communicates with a supply line with the opening in the inner end while the opposite ends of the distribution valve and the control body for the flow towards each other are displaceable to a connecting channel for the material from the supply line to form upon certain inward movement of the distribution valve body.