[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

IE86430B1 - A method and apparatus for spraying - Google Patents

A method and apparatus for spraying Download PDF

Info

Publication number
IE86430B1
IE86430B1 IE20120249A IE20120249A IE86430B1 IE 86430 B1 IE86430 B1 IE 86430B1 IE 20120249 A IE20120249 A IE 20120249A IE 20120249 A IE20120249 A IE 20120249A IE 86430 B1 IE86430 B1 IE 86430B1
Authority
IE
Ireland
Prior art keywords
gas
air valve
spraygun
trigger
fluid
Prior art date
Application number
IE20120249A
Other versions
IE20120249A1 (en
Inventor
James Lindsay
Original Assignee
James Lindsay
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by James Lindsay filed Critical James Lindsay
Priority to IE20120249A priority Critical patent/IE86430B1/en
Publication of IE20120249A1 publication Critical patent/IE20120249A1/en
Publication of IE86430B1 publication Critical patent/IE86430B1/en

Links

Landscapes

  • Nozzles (AREA)

Abstract

The invention relates to a spray gun, with either a pressure or gravity fed system being available that applies a very wide range of materials. In particular the invention provides an upper body section and a lower handle section. The upper body section houses the aircap assembly, fluid tube and fluid flow control assembly with the handle section housing the trigger, air valve, the gas and fluid inlet fittings. The trigger movement controls the regulated gas and fluid flow rates, where separate unobstructed gas flows feeding both annulus and horn chambers. The annulus gas pressure is adjusted to atomise the material flow rate using optimum energy, and the separate horn gas pressure is adjusted to control the fan width. The advantage of the invention is the very high transfer of material to the substrate using optimum pressure while achieving a quality of finish with compatible application timescales.

Description

Title A ,/' A method and apparatus for spraying.
Field of Invention The invention relates to a method and apparatus for spraying. Particularly, taut not exclusively, the invention is applicable to the spraygun for the application of a wide range of paints, coatings and similar materials, for example to be used in the automotive and aerospace industries, the light and heavy steel industries, the decorator and dd.y industries, and asbestos encapsulation.
Currendy several types of sprayguns are required to service the wide range of industrial applications, where conventional type sprayguns are used in the automotive industries and high pressure airless systems are used in the steel and decorator industries, and where asbestos encapsulation is a labour intensive brush or roller application.
The invention of this spraygun will carry out the wide range of the industrial uses described above, but not limited to these industries or industrial uses, The invention creates a very high efficiency performance through the aircap, where separate unrestricted gas pressure is fed into the annulus and horn chambers directly behind the aircap, this greatly improves the energy output and requires a fraction of the gas pressures to meet the required atomisation and fan pattern when applying the range of materials to the correct film thickness and quality of finish to meet production rates.
Background of the Invention The 1987 Montreal Protocol introduced a worldwide treaty to phase out numerous ozone depleting substances, which required the Volatile Organic Compounds (VOC’s) being reduced in the manufacture of paints, coatings and similar materials, this had the effect of reducing the solvent content of the material and created the term “high solids material·. During the early period of the treaty, the Environmental Protection Agency (EPA) required sprayguns to operate with a 65% Transfer Efficiency (TE) to assist in reducing the VOC emissions.
The continuing developments and manufacturing of high solids materials has outpaced spraygun developments, where the required pressures increases are reducing the TE.
This method and apparatus for spraying has advanced spraygun 15 technology to meet the spray application problems of high solids material by controlling the separate chambers behind the atrcap.
The method of separating the gas pressure to the annulus chamber and the gas pressure to the horn chamber eliminates the energy loss created when the horn chamber siphons off gas pressure from the annulus chamber, where this siphon method is common to all other similar conventional type sprayguns.
The individual control of the annulus chamber allows the optimum atomising energy to be set for the range of selected material type, and the individual control of the horn chamber allows the fan pattern to be set to suit the geometrical shape.
In conjunction with the material flow rates the individual controls can be adjusted to control the film thickness and fan pattern from a round airbrush dot to a wide wet film fan pattern.
The characteristics of the present spray apparatus allow the application of a wide range of materials, to include, but not confined to, thin film paints, laquers and bonds used in the automotive and aerospace industries through to the heavy protective coating used in the oil and gas industries, with a greatly reduced energy requirement.
The characteristics of the present spray apparatus is capable of applying high solids coatings to the required film thickness in a single layer, where test have indicated that high pressure airless spray applications show a reduced film thickness reading after a few minutes, and where attempts to apply a single layer creates runs and sagsThe characteristics of the present spray apparatus betters the EPA requirement by increasing the TE by a further 20%, and improves the health, safety and welfare of the operator and others by drastically reducing the hazardous airborne contaminants, that is common to the spray industry. The apparatus is easy to use and has a longer service life due to the low-pressure requirement to meet the application needs.
The spray apparatus can be placed in the market competitively with conventional type sprayguns, but will benefit the industry by carrying out tasks common to the more expensive high-pressure systems.
Statement of Invention According to the invention there is provided, as set out in the appended claims, a spraygun apparatus and a method for spraying using said apparatus.
The apparatus according to the invention comprises a single manufactured main body comprising of an upper horizontal body section and a downward angled handle section.
The upper body section has calculated machined groves in the sides of the body section to accommodate the needle clamp, the machined groves support the horizontal sliding motion of the needle clamp to a depth that still provides a sufficient wall thickness of the body section.
The front upper body section is machined to a calculated diameter in relation to the front diameter of the fluid tube; both these diameters create the calculated cross sectional area dimensions of the annulus chamber.
The front of the main body has a machined diameter bore depth to which the aircap housing is fitted and secured, the said aircap housing has a central bore hole diameter to match the calculated annulus bore diameter, and has a gas bore diameter to match the outlet of the horn gas bore where a critical alignment is made prior to securing of said aircap housing to ensure there is an unobstructed gas flow into the horn chamber. The aircap is fitted and secured by an aircap clamp, which can be adjusted to allow the aircap to rotate to suit the fan pattern.
The rear of the main body has machined diameter bores and a depth to which the fluid tube is fitted. Where a gravity feed method is selected, the main body is machined through the top protruding boss to accommodate a gravity tube. Where a pressure feed is selected, the bottom handle is machined to accommodate a pressure tube. The fluid tube is manufactured to accommodate either a gravity or pressure feed method, where the selected gravity tube or pressure tube is fitted prior the fluid tube being aligned and secured to the main body.
The critical alignment of the fluid tube requires the fluid spraytip to be fitted and secured to the front of the fluid tube; with the fluid tube positioned through the main body, and either the gravity tube or pressure tube Fitted into the fluid tube, the front of the fluid spraytip is then aligned flush with the outer face of the aircap and concentric to the bore of the aircap before securing the fluid tube to the main body.
The aforementioned fluid tube has the fluid seal housing Fitted and secured, then the fluid seal b* ring, the fluid seal and the fluid seal nut loosely Fitted to complete the fluid seal assembly.
The fluid needle fitted into the needle housing and then fitted into the flow adjuster, the said flow adjuster has the needle back stop fitted loosely to contain the said fluid needle and needle housing in a pre-assembly position, the flow adjuster in turn be fitted to the rear of the needle clamp and secured. The said needle then positioned through the fluid packing, and the needle clamp being carefully fitted into the machined grooves on either side of the main body, the needle aligns itself against the coned shape internal seat of the fluid spraytip. The fluid needle has self-align using the spraytip oone seat and the fluid seal. The said needle backstop has then to be tightened to secure the needle in the operational position, and the said fluid seal nut has to be tightened to complete the fluid seal assembly.
The characteristic of the main body is the twin gas inlets, where the front gas inlet feeds the horn chamber and the rear gas inlet feeds the annulus chamber. The twin gas bores, with matching diameters about 4.5mm, run parallel with the angle of the handle and curve gently into their relevant chamber outlets in the upper body section.
The rear gas bore has a diameter relationship between the cross sectional area of the annulus chamber, where the annulus chamber has a ratio of 4.5:1 times that of the cross sectional area of the annulus gas bore. The front gas bore has a similar diameter relationship with the rear gas bore diameter to match the gas flow rate requirement of the horn chamber.
The front upper handle section has a machined diameter bore and 5 depth to which the air valve housing is fitted and secured at 90° to gas bores to ensure a perfect alignment of the bores, where other air valves create an elliptical alignment problem.
The air valve housing has twin bore holes of similar diameters and alignment relation to the twin gas bore diameter passageways that to rise through the handle section, the alignment is critical and is carried out prior to securing the said housing.
On securing the air valve housing the air valve spring is fitted into the rear of the air valve and the air valve fitted into the said housing, then the air valve pin is fitted through the housing and through the slot in the air valve to secure the alignment of the air valve.
The air valve spring maintains the air valve in the normally closed position. To open the air valve, the trigger is activated where the governed movement of the trigger aligns the twin bore holes of the air valve with the twin bore holes of the housing and also with the twin gas bore holes to provide a clear and unobstructed passageway to the relevant chambers. The calculated dimensions of the gas bore holes and the relevant chamber ratios and clear passageways to the chambers greatly reduce the pressure losses common to other spray apparatus that have rough passageways, air valve stems within the passageways and also have contracted or expanded chambers that are believed to accelerate the airflow.
The aforementioned handle has a low-pressure twin gas inlet fittings secured; these fittings will receive a filtered and separately regulated compressed gas supply through secured flexible hoses. Ί The aforementioned handle has a low pressure fluid inlet fitting secured, this fitting receives a material feed from a standard low pressure 1:1 ratio diaphragm pump for high production use, or a standard pressure pot of various volumes for low to medium production use, both methods will use secured flexible hose.
On selection of a gravity type the aforementioned handle will not require the calculated dimensioned machined bore or the pressure tube to be fitted, where this selection is favoured a blank fitting will be secured in position, On selection of a gravity type product, a gravity tube will be fitted and secured to the calculated dimensioned machined bore in the upper body section; this tube will be able to receive various volumes of gravity cups to suit the low production use.
The apparatus for spraying has a trigger assembly movement to operate coaxially with the air valve angle, with the said trigger positioned to make contact with the front of the air valve protruding stem, and when the said trigger is activated it moves said air valve stem a calculated dimension until the trigger makes a contact stop against the air valve housing, said trigger movement aligns the air valve twin bore holes with 2D the air valve housing and gas inlet twin bore holes, and on releasing the said trigger activation the air valve spring and trigger spring returns said trigger and air valve to create a seal of the inlet gas flow through the air valve assembly.
The apparatus for spraying has an angled trigger assembly movement that also makes a contact with the horizontal needle clamp, on activating the trigger the vertical stems of the trigger assembly moves the said needle clamp a calculated dimension to remove the fluid needle from the fluid spraytip seat to allow a material flow, and on releasing said trigger activation the rear spring and trigger spring will return said needle clamp and said trigger to the deactivated position and allow the needle to seat within the s spraytip to create a seal of the material flow through the spraytip, and the air valve to close both the gas flows, and where the needle spring ensures that the needle has a pressurised fluid seal the air valve spring ensures the seal of both gas flow passageways, The apparatus for spraying creates a high energy efficiency through the aircap from the optimum low pressure gas, where a review of the recorded test results conclude that this has the effect of creating a slightly larger droplet which absorbs the energy and reduces the speed of the droplet, as the energy is exhausted in carrying the particulate to the substrate the bounce back effect’ is drastically reduced, this bounce back effect is common in the industry where the common method of creating as a fine a droplet as possible requires a high gas pressure atomisation, and where the unused energy allows the gas pressure to bounce back off the substrate and carry the fine droplets into the atmosphere.
A characteristic of the apparatus is a marked improvement to the quality of finish; where the apparatus is operated much closer to the substrate and the low pressures used to transport the droplet reduces the evaporation of solvents, allowing the larger droplet to hold more of the solvents and allow the correct film flow out functions of the solvents. Where other similar spray operations use double or treble the distance from the substrate with exceedingly high pressures that often result in a diy film or orange peel effect that require a labour intensive polishing operation to meet the quality of finish.
Brief description of drawings The invention will be more clearly understood when comparing the description of the individual items or sub assemblies by reviewing the accompanying drawings, in which: Figure 1. Shows a hatched sectional side view of the casting of a pressure type apparatus, and shows the position and location of sub assembly housings secured to the main body ready for sub assemblies to be fitted.
Figure 2. Shows a hatched sectional side view of the casting of a gravity type apparatus, and shows the position and location of the sub assemblies fitted into the relevant housings, and the air valve in the open position.
Figure 3. Shows a side view of the apparatus, indicating the location of the trigger assembly and the needle clamp assembly.
Figure 4. Shows a hatched sectional side view of the upper handle section of the apparatus, indicating the location and position of the air valve assembly, and trigger position.
Figure 5. Shows a sectional side view of the upper body of the apparatus, indicating the location and position of the fluid tube assembly.
Figure 6. Shows a sectional side view of the upper body of the apparatus, indicating the location and position of the fluid needle assembly.
Figure 7. Shows a side view of the apparatus, indicating the location and position of the trigger, needle clamp and rear spring.
Figure 3. Shows a hatched sectional plan view through the upper handle of the apparatus, indicating the location and position of the trigger assembly, Figure 9. Shows a hatched sectional plan through the main body of the apparatus, indicating the location and position of the needle clamp to the main body. ίο Figure 10. Shows a front view of the apparatus, indicating the profile of the aircap, trigger 21 and lower handle section of the main body.
Figure 11. Shows a rear view of the apparatus, indicating the location and position of the needle clamp, and trigger assembly and the profile of the handle section of the main body.
The characteristics of the invention are that the sub assemblies are easily aligned and secured to the main body, particularly where the air valve creates an unrestricted gas flow to the annulus and horn chambers to minimise pressure loss.
The characteristics of the mechanism of the apparatus is that the trigger carries out two actions, initially moving the air valve to the open position to allow a gas flow to the annulus and horn chambers, then moving the needle clamp which in turn moves the fluid needle to the open position to allow the fluid flow through the spraytip. On activating the trigger the air valve is opened allowing gas to flow prior to the fluid flow, this ensures there are no quality problems of material splatter or dripping. The trigger assembly is designed to meet the very short movement of the air valve while meeting the movement required moving the needle from its seat and allowing the fluid flow. On deactivating the trigger the spring return mechanisms close and seal both the fluid flow and the gas flow.
The characteristics of the material feed methods include a pressure apparatus, which requires a standard low-pressure material feed system to suit production demands, or a gravity cup feed, which Ξ5 come in various volumes to suit the task. The mobility of the pressure system material feed allows the use of shorter lengths of flexible hoses for the gas and fluid supply, which reduces flushing solvent volumes and the danger of hoses being burst by traffic.
The characteristic of the short movement of parts and low-pressure requirement prolongs the service life of the apparatus.
Detailed Description of the Invention Figure 1 - on Sheet 1 of 11 Shows a hatched sectional view of the pressure feed apparatus; the main body 04 is complete with sub assembly housing parts fitted in position. The main body 04 is an aluminium casting, where machining is carried out to accept the fitting and securing of the aircap housing 03, the fluid tube 6P, the air valve housing 17, and the pressure tube 30. Also the bottom handle section is machined to accept the fitting and securing of the fluid fitting 31, air fitting annulus 33 and the air fitting horn 34. On the housings being fitted and secured the relevant assemblies can be completed, as in Fig 2 Sheet 2 of 11.
Figure 2 - on Sheet 2 of 11 Show a hatched sectional view of the gravity feed apparatus, where machining is carried out to accept the gravity tube 29, this feed type does not require the machining for the pressure tube, but requires the bottom handle section to be machined to suit the fluid blank fitting 32. The horn chamber 37, and the annulus chamber 38 are identified for reference; the air valve 19 is set in the open position to show the clear and unobstructed passageway through to the horn chamber 37 and annulus chamber 38, from the relevant air inlet fittings 34 and 33. Also identified is the aircap assembly alignment, consisting of the aircap housing 03, the aircap 02 and the aircap clamp 01.
Figure 3 - Sheet 3 of 11 Show a side view of an assembled pressure feed apparatus, and identifies the aircap clamp 01 to indicate the front of the apparatus for future reference. On the trigger being activated it slides along both the front pin 23 and the rear pin 25 and turns an angled movement into a horizontal movement of the needle damp 11 with the vertical legs of the trigger 21. The flow adjuster 15 also moves with needle clamp 11 but needs to be manually adjusted to allow a flow of material.
Figure 4 - Sheet 4 of 11 Show a hatched sectional view that is focused on the upper handle section of tlie apparatus, and identifies the trigger 21 position against the air valve protruded stem, and trigger spring 22 which maintains the trigger deactivation, also identified is the air valve assembly which consists of the air valve housing 17 which is secured in a position that aligns with the gas bores, the air valve spring 18 that maintains the valve in the closed position until activated, the air valve 19 which allows the gas flow to the horn and annulus chambers when activated, and the air valve pin 20 which aligns the air valve bore holes to the gas bore holes.
Figure 5 - Sheet 5 of 11 Show a hatched sectional view that is focused on the pressure feed type fluid assembly of the apparatus, and identifies the position of the pressure type fluid tube 6P, the said fluid tube is positioned into the main body 04, the pressure tube 30 is then positioned into the fluid tube 6P and then both the said fluid tube and pressure tube are secured to the said main body. The fluid seal assembly is then fitted to the fluid tube 6P, where the fluid spraytip 05 is secured to the front of the said fluid tube, and the fluid seal housing 07 is fitted and secured through the rear of said fluid tube. The fluid seal Ό’ ring 08 is fitted to the fluid seal 09 and both items are fitted into position within the fluid seal housing 07. The fluid seal nut 10 is then fitted into position and loosely fitted to the fluid seal housing 07, only after the needle assembly is positioned and the needle has self centred can the fluid seat nut 10 be secured.
Figure 6 - Sheet 6 of Π Show a hatched sectional view that is focused on the upper main body 04 to identify the fluid needle assembly of the apparatus, where the fluid needle 13 is fitted into the needle housing 12 which in turn is then fitted into the flow adjuster 15. The needle spring 14 is positioned against said needle and the needle back stop 16 loosely fitted to the flow adjuster 15, said flow adjuster 15 is in turn fitted and secured into the needle clamp 11 and said fluid needle 13 entered through the fluid seal 09 to self centre against the internal seat of the fluid spraytip 05. The fluid seal nut 19 can now be secured to create the seal and the needle back stop 16 can now be secured to the self-aligned fluid needle.
Figure 7 - Sheet 7 of 11 Show a side view of the trigger and needle clamp assembly of the apparatus, which identifies the position of the needle clamp 11 that slides into the machined grooves on either side of the main body. The trigger 21 position is shown in where the trigger slot is in alignment with the front pin 23 and the rear pin 25, and the location and position of the rear spring 26 is identified against the needle clamp 11, said rear spring 26 has an axis on the rear pin 25 and front position against the rear spring stop 36 where the action of the said rear spring maintains the needle clamp 11 in position to create a fluid seal.
Figure 8 - Sheet 8 of 11 Show a hatched plan sectional view of the trigger assembly of the apparatus, which identifies the position of the trigger assembly in relation to the main body. The trigger spring 22 is fitted to the trigger 21 and the said trigger is slid into position on either side of main body 04, and said trigger spring 22 fitted onto the air valve housing 17. The trigger vertical sections are positioned into the needle damp as shown in Figure 7, and the front pins 23 are positioned through the trigger slots and secured into the main body 04 machined bores. The rear pin assembly can now be fitted by fitting the rear inner spacers 27, rear spring 26, rear outer spacer 28 into position then positioning the rear pins 25 through the trigger slots and in turn through the said outer spacer 28, rear spring 26, inner spacer 27 and securing into the said main body machined bores. The rear spring stop 36 is then secured into said main body machined bores, the said rear spring can now be located in position against the needle damp and rear spring stop as shown in Figure 7, Figure 9 - Sheet 9 of 11 Show a hatched plan sectional view of the needle clamp in relation to the main body, where the needle clamp 11 slides into the machined grooves on either side of the main body 04, Figure 10 - Sheet 10 of 11 Show a front view of the apparatus, which identifies the location and profile of the aircap damp 01 and the aircap 02, Also shown are the profile of the trigger 21 and the profile of the lower handle section of the main body 04.
Figure 11 - Sheet 11 of 11.
Show an rear view of the apparatus, which identifies the location and profile of the needle clamp 11, the position of the flow adjuster 15, needle back stop 16 to the needle damp 11, and the profile of the lower handle section of the main body 04.
Assembly of the Spraygun The assembly characteristic of the apparatus is the manufacture of the aluminium casting that is machined to accept and secure the various embodiments of housings and sub assemblies of the apparatus. Where the relevant assemblies are identified in the previous Detailed Description of the Invention and in conjunction with the relevant drawings from Figures 1 to 11, to include; - The fluid assembly that is detailed in Figure 5, - The aircap assembly that is detailed in Figure 2, - The fluid tube assembly that is detailed in Figure 5, - The fluid needle assembly that is detailed in Figure 6, - The air valve assembly that is detailed in Figure 4, - The gas and pressure fluid fitting assemblies that are detailed in Figure 1, “ The option of the pressure tube feed method that is detailed in Figure 1, or, - The option of a gravity tube feed method that is detailed in figure 2, - The needle clamp assembly that is detailed in Figure 7, Figure 9 and Figure 11, - The trigger assembly that is detailed in Figure 7, Figure S and Figure 10.
While the invention has been described herein with reference to preferred embodiments, these embodiments have been presented by way of example only, and do not limit the scope of the invention.
Changes to embodiments may be obvious to those skilled in the art from having the benefit of the above detailed description, especially to meet any further specific requirements or conditions. Further modifications may be possible in alternative embodiments without departing from the inventive concept. The invention is not limited to the embodiments herein before described but may be varied in both construction and detail.

Claims (14)

Claims
1. ) A spraygun apparatus comprising: a main body, the main body allowing the front fitting and securing of an 5 aircap assembly and the rear fitting and securing of a fluid tube assembly and needle clamp assembly, and if selected a top fitting and securing of a gravity tube, or if selected the fitting and securing of a pressure tube, an angled handle section attached to the main body, the 10 handle section allowing the front fitting and securing of an angled air valve assembly, the handle section having smooth and unobstructed parallel gas flow bores from the bottom of the angled handle section and upwards at a similar angle through the angled 15 handle section to the front horn chamber and central annulus chamber, the handle section further comprising gas bores that have unrestricted passageways from the relevant gas inlets through the valve chamber and Into the main body hom 20 and annulus chambers, the handle section further comprising a fluid bore that has an unrestricted passageway into the fluid tube assembly, the handle section further comprising a trigger assembly for allowing or stopping the flow of gas or fluid through the 25 handle section to the main body, the main body being characterised by the annulus cross sectional area being in the range of four to five times the cross sectional area of the gas bore feed.
2. ) The spray gun apparatus according to claim 1 wherein the gas bores each have an internal diameter of about 4.5mm.
3. ) The spraygun apparatus according to either of claim 1 or 2
4. ) A spraygun apparatus according to any of claims 1 to 3 wherein the gas on exiting the aircap has laminar airflow with a pressure range of between about 0.2 to about 2.1 Bar (about 3 to
5. With the air valve housing, and the angular trigger movement is simultaneously translated into a horizontal movement of the needle clamp to remove the fluid needle from its seating within the spraytip to allow fhe material to flow. 5) A spraygun apparatus according to any previous claim wherein the upper front handle contains an air valve housing critically positioned and secured to align the twin bore holes of said air valve housing with the twin parallel gas bore hole passageways 15 that rise through the handle section, and said air valve housing having an air valve assembly fitted and secured, such that when the trigger is activated the twin bore holes in the air valve align with both the twin bore holes of said air valve housing and said twin parallel gas bore passageways that rise through the handle section 20 to ensure that the twin gas inlets have a clear and unobstructed passageway to their relevant chambers. 5 wherein the annular cross sectional area is 4.5 times that of the gas bore feed.
6. ) A spraygun apparatus according to any previous claim wherein the aircap housing has a bore hole of similar diameter to the gas bore outlet. 25
7. } A spraygun apparatus according to claim 6 where the aircap bore hole and the gas bore outlet are aligned within the main body to allow a clear and unobstructed passageway into the horn chamber.
8. ) A spraygun apparatus according to any previous claim wherein the trigger assembly movement operates coaxially with the air valve, and where said trigger is positioned to make contact with the protruding air valve,
9. } A spraygun apparatus according to claim 8 wherein activating the trigger moves the air valve until the trigger makes a contact stop
10. Deactivating the trigger, a rear spring returns the needle clamp and allows the needle to create a fluid seal within the fluid spraytip, and simultaneously the trigger spring returns the trigger and a further spring returns the air valve to the closed position. 10) A spraygun apparatus according to claim 9 wherein on 10 about 30psi),
11. ) A spraygun apparatus according to any previous claim 15 wherein the optimum low pressure gas flow through the aircap creates a large droplet size which absorbs the kinetic gas energy and consequently reduces the speed of the droplet towards the substrate, which in turn increases the transfer efficiency of material to the substrate by greatly reducing the bounce back of mist into the 20 atmosphere created by high pressure applications.
12. ) A spraygun apparatus according to any previous claim wherein the apparatus may be operated much closer to the substrate than is normal for spraygun operations, and in conjunction with low pressure gas flow through and from the 25 apparatus reduces the evaporation of the solvents from the droplets while in transit to the substrate.
13. ) A method of coating a substrate by means of a spraygun apparatus characterised by the spraygun apparatus being the apparatus as claimed in any of claims 1 - 12.
14. ) A method of coating a substrate according to claim 13, wherein the spraygun apparatus is operated much closer to the substrate than is normal for conventional spraygun apparatus.
IE20120249A 2012-05-02 2012-05-02 A method and apparatus for spraying IE86430B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IE20120249A IE86430B1 (en) 2012-05-02 2012-05-02 A method and apparatus for spraying

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE20120249A IE86430B1 (en) 2012-05-02 2012-05-02 A method and apparatus for spraying

Publications (2)

Publication Number Publication Date
IE20120249A1 IE20120249A1 (en) 2013-11-06
IE86430B1 true IE86430B1 (en) 2014-08-27

Family

ID=49580020

Family Applications (1)

Application Number Title Priority Date Filing Date
IE20120249A IE86430B1 (en) 2012-05-02 2012-05-02 A method and apparatus for spraying

Country Status (1)

Country Link
IE (1) IE86430B1 (en)

Also Published As

Publication number Publication date
IE20120249A1 (en) 2013-11-06

Similar Documents

Publication Publication Date Title
US9199260B2 (en) Repeatable mounting unit for automatic spray device
US7497387B2 (en) One-piece fluid nozzle
US20070262172A1 (en) Modular Spray Gun with Multiple Control Modules
US7568635B2 (en) Turbo spray nozzle and spray coating device incorporating same
CN102227269A (en) Poppet check valve for air-assisted spray gun
US10213795B2 (en) Fluid dispensing apparatus and methods utilizing a resilient nozzle
AU4881902A (en) Spray gun with improved needle shut-off valve sealing arrangement
US4154403A (en) Spraygun
CN102227268A (en) Integrated flow control assembly for air-assisted spray gun
US4076173A (en) Atomizer
US5799875A (en) HVLP spray gun and integrated fluid nozzle therefor
GB2529754A (en) Spray gun
CA2066061A1 (en) Pressure feed paint cup valve
US20210394208A1 (en) Fluid sprayer and components of a fluid sprayer
US5294057A (en) Solenoid operated liquid spray gun
US9610601B2 (en) Paint spraying device
EP1066116B1 (en) Spray gun with common control of fluid and air valve
US8273417B2 (en) Spray coating system and method
US20100308134A1 (en) Automatic Paint Spray Gun For Two-Component Systems
IE86430B1 (en) A method and apparatus for spraying
US10786824B2 (en) Spray gun
JP6046730B2 (en) Spraying device with curved passage
WO2000023196A2 (en) Modular fluid spray gun for air assisted and airless atomization
IES58774B2 (en) A spray bar assembly
JPH03114559A (en) Spray gun