GB2026348A - Spraying inside hollow bodies - Google Patents
Spraying inside hollow bodies Download PDFInfo
- Publication number
- GB2026348A GB2026348A GB7914750A GB7914750A GB2026348A GB 2026348 A GB2026348 A GB 2026348A GB 7914750 A GB7914750 A GB 7914750A GB 7914750 A GB7914750 A GB 7914750A GB 2026348 A GB2026348 A GB 2026348A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pipe
- fluid
- shank portion
- passage
- spreader
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
- B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
- B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
- B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
- B05B1/3431—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves
- B05B1/3447—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves the interface being a cylinder having the same axis as the outlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
- B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
- B05B1/265—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being symmetrically deflected about the axis of the nozzle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
A fluid-applying system for coating interior surfaces of box sections, e.g. for rust-proofing interiors of sills of motor vehicles, has a flexible pipe 14 having a nozzle end which creates a spray extending, radially from the longitudinal centre line of pipe, over 360 DEG . The flexible pipe enables existing drain holes 12 to be used for access to the interior and the force of the spray centralises the nozzle end in the box section. The nozzle end is provided by a spreader element 16 inserted into the pipe, the element comprising a shank portion 18, accommodated in the pipe and forming passages therewith for the pressurised fluid, and a head portion 20 against which the fluid from the passages impacts to form the spray. <IMAGE>
Description
SPECIFICATION
Coating interior surfaces of box sections
This invention is concerned with coating interior surfaces of box sections, e.g. coating interior surfaces of sills of a motor vehicle with a rust-proofing fluid.
Current methods for such coating involve the drilling of holes in the sills at selected points and the insertion into such holes of a rigid nozzle connected to a pressurised source of rustproofing fluid. Such methods require a number of holes to be drilled, which is not only time-consuming but also either thus gives rise to an undesirable number of such holes in the sills thereby exposing the interior to the elements, or alternatively incurs extra cost in providing plugs for such holes.
In the course of manufacture of sills, drain holes are provided therein, at locations considered appropriate for draining purposes. Using current methods, however, the location of the drain holes is unlikely to render them useful in the application of the rustproofing fluid along the whole length of the interior of the sill, because of the nature of the equipment currently in use.
It is thus the object of the present invention to provide a fluid-applying system by which the interior surfaces of box sections can be coated with fluid, e.g. rustproofing fluid, without the need for drilling a series of holes therealong or, in the case of sills of a motor vehicle, without the need for holes to be provided in such sills in addition to the drain holes provided therein.
The present invention thus provides a fluid applying system comprising a flexible supply pipe which can be connected to a source of fluid under pressure and a spreader element comprising a head portion and a shank portion, the shank portion being secured in the end portion of the pipe in such a manner that at least one passage is formed between the shank portion and the inside wall of the pipe, and further in such a manner that an underside of the head portion is spaced from the end of the pipe by a gap, the or each passage opening into said gap, and the arrangement being such that fluid under pressure can be supplied along said passage(s) and be deflected, by impact with the underside of the head portion of the spreader element, to cause the fluid to be applied through said gap in a spray extending, substantially radially of the longitudinal centre line of the pipe, over 360".
Conveniently the pipe and also the shank portion of the spreader element are cylindrical. If desired, furthermore, the shank portion may be provided with one or more helical threads, providing one or more helical passages between the inside wall of the pipe and the shank portion. Furthermore, with an appropriately dimensioned central bore, the helical thread or threads also serve to secure the spreader element in the end portion of the pipe without additional fixings, even during the application of fluid under pressure sufficient to provide the desired spray.
Advantageously, furthermore, a metal sleeve, e.g. of stainless steel, may be inserted between the shank portion of the spreader element and the inside wall of the pipe. This assists in holding the spreader element in the pipe and strengthens the end portion of the latter.
The spreader element is preferably made from metal, which may have hardened and tempered. If desired, it may be electro-brassed or zinc-coated, or be made from stainless steel.
Preferably the pipe is made of flexible, plastic tubing, e.g. polythene.
In use, because of the flexibility of the pipe, it can be inserted in any hole of an appropriate size provided in the box section interior surfaces of which are to be coated, e.g. in the case of a sill of a motor vehicle, a drain hole, and the pipe accommodates itself to the shape of the interior of the section.
Furthermore, with the pipe thus inserted, the spray created at the "nozzle end" of the pipe is effective by its force to support said end substantially centrally of the box section so that a uniform coating over 360 is achieved. The user merely drawing on the pipe to draw the nozzle end thereof along the box section in order to achieve a progressive coating over the whole of the interior surface.
If the pipe is of sufficient length, and if the drain hole in a sill is located at one end thereof, the whole of the interior surface can be coated in a single insertion and drawing out of the nozzle as aforesaid; where, on the other hand, the pipe is of shorter length, the coating can be carried out in two or more operations. It will of course be appreciated that the number of operations will depend largely upon the number and distribution of the drain holes, it being the intention underlying the invention to avoid the need for creating further holes in the box section walls.
Also, since the supply pipe is flexible, drain holes may be used even though they will usually be located in the bottom wall of the box section, or holes may be used from within the car body and at right angles to the direction of the major axis of the box section.
Conveniently, the source of fluid under pressure is constituted by a hand-operated pump unit which the user holds and operates and can at the same time pull on to achieve the desired drawing of the nozzle end along the box section as aforesaid. Of course it will be appreciated that any suitable pump unit, hand-operated or otherwise, may be used.
The invention is further concerned with the use of a fluid-applying system as set out above for the application of rust-proofing fluid to the interior surface of sills and other box sections forming part of motor vehicles.
Two fluid-applying systems in accordance with the invention and their use will now be described in detail, by way of non-limiting example of the invention, with reference to the accompanying drawings, in which:
Figure 1 is a fragmentary view, in section, showing the interior of a box section in which a fluid-applying system in accordance with the invention is in operation;
Figure 2 is a section view of a nozzle of a first one of the fluid-applying systems in accordance with the invention;
Figure 3 is a section taken along the line Ill-Ill of Fig. 2; and
Figure 4 is a section view, similar to Fig. 2, but of the second one of said systems.
Referring to the drawings, Fig. 1 shows part of a box section, constituted by a sill 10 having a drain hole 1 2 provided in the underside thereof, the interior surface of which sill is to be coated with a rust-proofing fluid. For this latter purpose, one end of a flexible pipe 14, of polyethylene tubing, is inserted through the drain hole 12, the other end thereof being connected to a hand-operated pump unit (not shown), in the form of a unit known as the ASL 500, manufactured by
Associated Sprayers Ltd. of Birmingham. Inserted in said one end of the pipe 14 is a spreader element 1 6 by means of which a spray S is created which extends, radially of the longitudinal centre line of the pipe over 360 . Said one end thus constitutes a nozzle end of the pipe.
In use, the nozzle end of the pipe 14 is inserted into the interior of the sill 10, as far as desired or according to the length of the pipe 14, and thereafter, while the fluid is pressurised, and the spray S thus created, the pipe is withdrawn from the drain hole 1 2 so that the interior surface of the sill 10 is progressively coated by the spray. The speed of such withdrawal and the pressure applied determine the thickness of the coating. As shown in Fig. 1, the spray S is effective to hold the nozzle end of the pipe 14 centralised, or substantially so, in the sill.
Figs. 2 and 3 shows details of a first fluid applying system in accordance with the invention. In this system the spreader element 16, comprising a shank portion 1 8 and head portion 20, is made from stainless steel or from hardened and tempered steel which may be electro-brassed or bright zinc-coated. The shank portion 18 has one or more helical threads 22, which serve to hold the spreader element in the end portion of the pipe 14 even whilst fluid under pressure is supplied through the pipe. Furthermore, the thread or threads 22 form, with the inside wall of the pipe 14, one or more helical passages 24 along which the fluid can pass.The spreader element 1 6 is inserted into the end of the pipe 14 in such a manner that a gap 26, of approximately 1 mm, is formed between the inside wall of the pipe and the head portion 20 of the spreader element. The diameter of the head portion 20 is preferably substantially the same as the outside diameter of the end of the pipe 14.
When fluid under pressure is supplied along the pipe 1 4 and helical passage or passages 24 it is deflected by impact with the underside of the head portion 20 to cause the fluid to be applied through the gap 26 in a spray extending, radially of the longitudinal centre line of the pipe 14, over 360 .
Fig. 4 shows details of the second fluidapplying system in accordance with the invention. The system is generally similar to the system above described, differing primarily in that a sleeve 28 of stainless steel, approximately i mm thick, is inserted between the shank portion 1 8 of the spreader element 1 6 and the inside wall of the pipe 14. It has been found by force-fitting the sleeve 28 and shank portion 1 8 into the pipe end, the various elements at the nozzle end can readily withstand the pressure of the fluid passing therethrough. In addition, the sleeve 28 serves to reinforce the pipe 14 at the nozzle end thereof.
In said second system a passage or passages 24' for the fluid are formed between the thread or threads 22 of the spreader element and the inside wall of the sleeve 28.
Also the end of the sleeve 28 is flush, or substantially flush, with the end of the pipe 14, maintaining the gap 26 of approx. 1 mm between the under-side of the head portion 20 and the ends of the pipe 14 and sleeve 28.
The fluid-applying systems above described are especially, but not exclusively useful in coating interior surfaces of sills of motor vehicles with rust-proofing fluid. Furthermore, because of the facility for using existing holes in the sills and chassis box members, and also bearing in mind the relatively low cost of the equipment, the systems are especially suited to a Do-lt-Yourself use.
Claims (11)
1. A fluid-applying system comprising a flexible supply pipe which can be connected to a source of fluid under pressure and a spreader element comprising a head portion and a shank portion, the shank portion being secured in the end portion of the pipe in such a manner that at least one passage is formed between the shank portion and the inside wall of the pipe, and further in such a manner that an underside of the head portion is spaced from the end of the pipe by a gap, the or each passage opening into said gap, and the arrangement being such that fluid under pressure can be supplied along said passage(s)
and be deflected, by impact with the under
side of the head portion of the spreader 'element, to cause the fluid to be applied
through said gap in a spray extending, sub
stantially radially of the longitudinal centre
line of the pipe, over 360'.
2. A system according to Claim 1 wherein
the pipe and the shank portion of the spreader
element are cylindrical.
3. A system according to Claim 1 wherein
a sleeve is inserted between the shank portion
of the spreader element and the inside wall of
the pipe, the or each passage being thus
formed between the shank portion and the
inside wall of said sleeve.
4. A system according to Claim 2 together
with Claim 3 wherein the sleeve is also cylin
drical.
5. A system according to either one of
Claims 3 and 4 wherein the sleeve is of
stainless steel.
6. A system according to either one of
Claims 2 and 4 wherein the shank portion has
at least one helical thread, providing at least
one helical passage along which fluid can be
supplied as aforesaid.
7. A system according to any one of the
preceding Claims wherein the spreader ele
ment is of stainless steel.
8. A system according to any one of
Claims 1 to 6 wherein the spreader element is
of hardened and tempered steel and is either
electro-brassed or zinc-coated.
9. A system according to any one of the
preceding Claims wherein the pipe is of flexi
ble plastics tubing.
1 0. A fluid-applying system constructed
arranged and adapted to be used substantially
as hereinbefore described with reference to
Figs. 1 to 3 of the accompanying drawings.
11. A fluid-applying system constructed
aranged and adapted to be used substantially
as hereinbefore described with reference to
Figs. 1 and 4 of the accompanying drawings.
1 2. The use of a fluid-applying system
according to any one of the preceding Claims
for the application of rustproofing fluid to the
interior surfaces of sills and other box sections
forming part of motor vehicles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7914750A GB2026348A (en) | 1978-04-29 | 1979-04-27 | Spraying inside hollow bodies |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1714278 | 1978-04-29 | ||
| GB7914750A GB2026348A (en) | 1978-04-29 | 1979-04-27 | Spraying inside hollow bodies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2026348A true GB2026348A (en) | 1980-02-06 |
Family
ID=26252506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7914750A Withdrawn GB2026348A (en) | 1978-04-29 | 1979-04-27 | Spraying inside hollow bodies |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2026348A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995008397A1 (en) * | 1993-09-22 | 1995-03-30 | Nordson Corporation | Improvements in and relating to powder spray coating |
| CN101773891A (en) * | 2010-01-12 | 2010-07-14 | 陈福明 | Spray method and spray technology for inner walls of small-caliber metallic conduits |
| WO2010125282A1 (en) * | 2009-04-29 | 2010-11-04 | Arkema France | Spraying device and method |
-
1979
- 1979-04-27 GB GB7914750A patent/GB2026348A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995008397A1 (en) * | 1993-09-22 | 1995-03-30 | Nordson Corporation | Improvements in and relating to powder spray coating |
| WO2010125282A1 (en) * | 2009-04-29 | 2010-11-04 | Arkema France | Spraying device and method |
| FR2944980A1 (en) * | 2009-04-29 | 2010-11-05 | Arkema France | DEVICE AND METHOD FOR SPRAYING |
| CN101773891A (en) * | 2010-01-12 | 2010-07-14 | 陈福明 | Spray method and spray technology for inner walls of small-caliber metallic conduits |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |