NZ217378A - Powder coating spray booth with releaseable powder storage and recovery module: vertical inlet and outlet in recovery module - Google Patents

Description

217378 Patents Form No. 5 Patents Act 1953 COMPLETE SPECIFICATION "A POWDER COATING SPRAY BOOTH" WE, NOKDSON CORPORATION, of 555 Jackson Street, Amherst, Ohio 44001, United States of America, hereby declare the invention, for which we pray that a patent may be granted to us, arid the method by which it is to be performed, to be particularly described in and by the following statement: - 1 217378 The present Invention relates to powder coating spray booths.

In conventional spray tooths it is generally difficult and tire consigning to change the colour of the powder being applied to the articles surpassing through the booth. This greatly effects the efficiency in respect of time of operation and cost of the spray booth.

It is the object of the present invention to overcome or substantially ameliorate the above disadvantages.

There is disclosed herein a cartridge module For a powder coating spray booth, said booth having a spray chamber through which articles pass to be coated by a powder gun, passage means to duct air from said chamber and defining an opening through which air from within said chamber may be drawn to ca-ry from said chamber excess powder to be recycled through the gun. and an air outlet to be placed In communication with said opening via said module, said module being adapted to be releasably secured to said booth and comprising a hollow housing defining a duct to extend between said opening and said outlet, said duct terminating at one end with a duct opening placed in alignment with said opening of said booth, at least one filter element located in said duct to filter air passing therethrough, said duct terminating at its other end with a second opening in communication with said outlet, powder recovery means located beneath said element to enable recycling of said powder to said powder gun, said duct opening being generally vertically extending so as to be horizontally facing, and said second opening also being generally vertically extending and horizontally facing.

Fig. 1 Is a schematic sectioned side elevation of a powder coating spray booth and colour change module attached thereto; Fig 2 is a schematic perspective view of a further powder coating spray booth and colour change module therefor; and Fig. 3 is a schematic side elevation of the booth and module of Fig. 2.

In the accompanying drawing there is schematically depicted a powder coating spray booth 10 and a colour change module 11 releasably secured thereto. In operation of the spray booth 10, one or more colour change modules 11 may be provided in order to enable the spray booth*TO to use different coloured powders and/or powders hav properti es. ;i . ;! . ;"22 OCT 1987'7 ;, / ;2 ;217378 ;The booth 10 comprises a generally closed housing 12 through which elements 13 oass to be coated by the powder gun 14. The housing 12 is provided with slots 15 to enabie the elements >3 to pass tnreugn t^e ncjsing "'2 by means oT~ a conveyer assembly 16. The rising 12 nas a res- «all 17 ,jeci n<n; an coen: ng i? tnrcjgh *Hic" ei r pars ing tnro.^n the fusing 12 exits. Ths housing 12 is also C'ovided with an outlet d'jct 21 provided with a fan 22 which draws air from the opening 18 via the colour change modu'e li.

The colour change msaule 11 includes a housing 19 defining a duct 20 which provides for communication between the opening 18 and the outlet 21. Located in the duct 20 are one or more filter elements 23. Located beneath the element 23 is a trough 24 through which powder can be delivered via a powder makeup shoot 25. Add'tionally excess powder is deposited 1: the trough 24 to be recycled tnrough the gun 14. The colour change module 11 is preferably mobile in that it is provided with whee's 26 and is provided with snap catches to releasably secure the cclojr change module to T'^e spray booth 10.

Ir. Figs. 1 and 3 there is schematically depictec a cowce- coating spray booth 30 and colour change module 31 releasably secjred theritc. The spray booth 30 is of similar construction to the spray booth 10 of Fig. i in that in provides a chamber within which objects are powder coated. An airstream is passed through the chamber to the module 31 whereat excess powder is extracted from the airstream, prior to the airstream being exhausted to atmosphere. The powder coating spray booth 30 has an exhaust fan assembly 32 which draws air from within the coating chamber via the module 31. The module 31 would be provided with one or more filters In a similar manner to the module 11 of Fig. 1. In this particular embodiment, the module 31 sealingly engages the wall 33 of the booth 30, which wall 33 is provided with an opening communicating with the coating chamber. The upper end of the module 31 communicates with the exhaust fan assembly 30. In particular, there is provided a flexible ducting means 34 which is releasably secured to the upper end of the module 31 by means of catches 35. The body of the module 31 is attached to the wall 33 by means of catches 36.

Preferably the module 31 is provided with wheels 37 to facilitate transportation thereof. The lower end of the module 31 th a trough 38 within which the excess powder is oeposited;together wlth;^ additional powder to pass through the spray gun. ; °! \ 22 OCT 1987 ;

Claims (2)

1. 217378 CI IS: l . A ca-'tridge r.ccu1? for a powder coat'-1; spray tooth, sa;a booth having a spray chamber througn which artKies pass to be coated by a pc»:er gjn, rissage rr.&&r,5 to duct air from sa:d char.oer and defining an opening through which air from within said chamber may be drawn to carry from said chamber excess powder to be recycled through the gun, and an air outlet to be placed in communication with said opening via said module, said module being adapted to be releasably secured to said bootr and comprising a hollow housing defining a duct to extend between said opening and said outlet, said duct terminating at one end with a d«_ct opening places in alignment with said opening of saic booth, at least one filter element located in said duct tc filter air passing therethrough, saia duct Terminating at its other end with a second opening in communication with said outlet, powder recovery means located beneath said element to enable recycling of said powder to saia powder gun, said duct opening being generally vertically extending so as to be horizontally facing, and said second opening also being generally vertically extending and horizontally facing.
2. 2. A cartridge module for a powder coating spray booth, substantially as hereinbefore described with reference to the accompanying drawings. By ^tf/thelr authorised AgentJ., A. J. PARK & SON. Per Qj(0^—'