Rear casing for a spray gun and spray gun comprising a rear casing of this type
A rear casing is disclosed for a spray gun that has a handle part and a gun barrel connected to the handle part. The rear casing can be removably and exhangeably attached to the rear side of a main body of the spray gun and has a first region designed as a handle casing and a second region designed as a covering casing for rear-side covering of a rear region of the gun barrel. At least one connection element is provided on the second region of the rear casing for optionally forming a removable connection to a part having, for this purpose, at least some portions with a design complementing that of said connection element. In particular, according to the invention, the entire rear casing, together with the at least one connection element, is designed as a monolithic plastic component, in particular a plastic injection moulded molded part.
1 . A powder spray gun comprising:
a handle having a base body;
a gun barrel having a base body;
a rear casing; and
a nozzle assembly,
wherein the base body of the handle is integrally formed with the base body of the gun barrel as a monolithic plastic injection molded part to form a base body of the powder spray gun;
wherein the rear casing of the powder spray gun is attached to a rear side of the base body of the powder spray gun, and wherein the rear casing of the powder spray gun comprises a first region designed as a handle casing and a second region designed as a cover casing for rear-side covering of a rear-most rearward facing surface of the gun barrel;
wherein the base body of the gun barrel has a front region extending to the nozzle assembly of the powder spray gun and a rear-side rear region opposite the front region of the base body of the gun barrel;
wherein the handle is arranged between the front region and rear region in an area in which the handle is located below a center of mass of the gun barrel as a whole;
wherein the powder spray gun further comprises an adapter that is provided on a lower region of the handle and that provides a connection between a coating material supply line and a coating material line running through the handle; and
wherein the powder spray gun further comprises an electrode arrangement accommodated or integrated in the gun barrel of the powder spray gun in order to electrostatically charge coating material to be sprayed by the powder spray gun;
wherein the rear casing is formed as a monolithic component made of an anti-static plastic material;
wherein an at least partially graded area is provided at least in some front longitudinal edge areas of side walls of the rear casing, on frontal areas of the front longitudinal edge of the side walls of the rear casing, wherein the frontal areas are formed complementary to a corresponding area on the rear side of the base body of the powder spray gun; and
wherein the graded area provided on the frontal areas of the front longitudinal edge of the side walls of the rear casing is configured to form a labyrinth seal with the corresponding area on the rear side of the base body of the powder spray gun.
2 . The powder spray gun according to claim 1 ,
wherein the rear casing comprises a transition region connecting the first region designed as a handle casing to the second region designed as a cover casing.
3 . The powder spray gun according to claim 1 ,
wherein the first region designed as a handle casing is curved or angled in cross section at least in some areas and comprises a rear wall and two side walls integrally formed thereon.
4 . The powder spray gun according to claim 3 ,
wherein outer surfaces of the rear wall and the side walls formed on the first region designed as a handle casing have a surface configuration adapted for increasing a secure grip formed as a multi-edged curved shape adapted to a human hand.
5 . The powder spray gun according to claim 3 ,
wherein at least one cable strain relief is integrated into the rear wall of the first region designed as a handle casing.
6 . The powder spray gun according to claim 1 ,
wherein the second region designed as a cover casing is curved in cross section at least in some areas and comprises a rear wall and two side walls integrally formed thereon.
7 . The powder spray gun according to claim 6 ,
wherein the second region designed as a cover casing further comprises an upper wall integrally formed on the rear wall and the side walls formed on the second region designed as a cover casing with at least sections or parts thereof disposed opposite the first region designed as a handle casing.
8 . The powder spray gun according to claim 6 ,
wherein at least one recessed opening for at least one control element of the powder spray gun is provided in the rear wall of the second region designed as a cover casing, wherein the at least one recessed opening is configured to receive and/or embed the at least one control element in a recessed manner.
9 . The powder spray gun according to claim 6 ,
wherein at least one galvanically conductive grounding element is integrated into the rear casing.
10 . The powder spray gun according to claim 9 , wherein the at least one galvanically conductive grounding element is integrated into material of one of the two side walls of the second region designed as a cover casing.
11 . The powder spray gun according to claim 1 , wherein one single opening is formed in the rear casing for accommodating a screw for detachably fixing the rear casing to the base body of the powder spray gun.
12 . The powder spray gun according to claim 1 ,
wherein a centering device, formed as a centering tab, is provided at least in some front longitudinal edge areas of side walls of the rear casing to effect an independent aligning of a position of the rear casing relative to the rear side of the base body of the powder spray gun when the rear casing is mounted on the rear side of the base body.
13 . The powder spray gun according to claim 1 ,
wherein at least one opening is formed in the rear casing for accommodating a screw for detachably fixing the rear casing to the base body of the powder spray gun.
14 . The powder spray gun according to claim 1 , wherein the anti-static plastic material comprises Polyamide 12.