JP2008012493A - Coating material spray apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a simple spray gun suitable for spraying a coating material such as a cement material, a sand like spraying material, an acrylic resin, a pigment on concrete or steel with an air nozzle. <P>SOLUTION: In the coating material spraying apparatus, a compressed air jetting port 3 is arranged on a common center line (c) inside a flow-out port 2 for a spray coating material 1 and a spiral air swirling element is supported on the common center line (c) inside the air jetting port 3 to jet while swirling the compressed air from the coating material flow-out port 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a spray gun that sprays a mixed coating material such as cement mortar and paint onto a concrete wall surface.

  Conventionally, there is a spraying apparatus for fireproof coating construction in which incombustible fiber cotton is sent in dry air with compressed air through a hose with a diameter of about 100 mm and sprayed onto the wall surface, and at the same time, an aqueous cement solution is sprayed onto the incombustible fiber and solidified. There was a swirling diffusion effect of the solution (for example, Patent Document 1).

  However, the above-mentioned spraying material sprays nonflammable fibers from the outer tube and powdered raw materials (cement, dihydrate gypsum and water) from the circular tube by swirling with a swirl plate, and the incombustible fibers (asbestos) are scattered in the air. There was a problem.

  In addition, there is an air spray gun that discharges a small amount of paint and ejects air from its outer periphery, but it is difficult to apply to spray coating of high viscosity materials such as cement mortar (for example, Patent Document 2).

JP 2006-26499 A JP 2002-361122 A

  SUMMARY OF THE INVENTION An object of the present invention is to obtain a simple spray gun suitable for spray-coating a spray coating material made of cement material, sand-like spray material, acrylic resin, pigment or the like onto concrete, steel material or the like with an air nozzle.

In order to achieve the above object, according to the present invention, first, a compressed air jet outlet is disposed on a common center line inside the spray coating material outlet, and a spiral air swirler is arranged on the common center line inside the air jet outlet. A coating material spraying device, wherein the compressed air is swirled and jetted from the coating material outlet,
Secondly, the outlet is opened laterally on the center line at the lower end of the spray coating material storage hopper, and the inner diameter of the outlet and the inner diameter of the air outlet are substantially the same. The coating material spraying device according to the first invention, wherein an outflow interval is interposed between the jetting port and the jetting port;
Thirdly, the air jet port opens at the tip of the laterally compressed air tube, and a tapered enlarged portion is formed inside the jet port via an inner diameter squeezed portion. A coating material spraying device according to the first or second invention, wherein
Fourth, the coating device according to any one of the first to third inventions, wherein the swirler forms a double spiral plate around the center line.
Consists of.

  Accordingly, when the spray coating material is introduced into the storage hopper, the coating material flows out from the outlet.

  In that state, the compressed air is ejected from the air ejection port in the direction of the center line.

  The compressed air to be ejected is swirled in one direction around the center line by the swirler in the compressed air pipe, and is ejected from the ejection port toward the coating material outlet, between the outlet and the outlet. With this spray coating material, it is possible to coat the wall surface by spraying it from the outlet toward the wall surface to be coated.

  Since the present invention is configured as described above, the coating material about to flow out from the outlet is swirled by the swirling compressed air ejected from the inner outlet, and the coating material impinges on the wall to be painted by its viscosity. The irregular irregular pattern can be easily and easily applied evenly.

  A spray coating material 1 made of cement mortar, acrylic resin paint (with white titanium oxide pigment and coloring pigment) or the like is put into the movable storage hopper 5.

  The outlet 2 of the coating material 1 is disposed on the horizontal common center line c at the lower end 5 'of the storage hopper 5 (FIG. 1).

  Inside the outflow port 2, a compressed air jet port 3 opened at the tip of the laterally compressed air tube 6 is disposed on the common center line c, supported by the lower end portion 5 ′ of the hopper 5, and the air tube The other end portion 6 ′ of 6 is exposed to the opposite side of the lower end portion 5 ′ and is connected to the compressed air tube 10 via the on-off valve 9.

  An inner diameter of the compressed air outlet 3 and an inner diameter of the outlet 2 are formed substantially the same, and an outflow interval t of the coating material 1 is interposed between the outlet 2 and the outlet 3.

  A tapered diameter-expanded portion 3 ″ is formed inside the spout 3 via an inner diameter squeezed portion 3 ′, and a diameter-expanded chamber 11 is provided at the diameter-expanded end of the diameter-expanded portion 3 ″. A female screw 12 is formed at the inner end, and is screwed onto a male screw 12 ′ formed at the distal end of the compressed air tube 6, thereby holding the expanded chamber 11.

  The double spiral plates 8 and 8 are provided on the outer periphery of the small shaft 7 (small pin) sharing the center line c inside the diameter expansion chamber 11, and the tips of the spiral plates 8 and 8 are connected to the diameter expansion chamber 11. It can fix to a rotation direction and a sliding direction with the squeezing air pressure at the front-end | tip.

  Therefore, when the on-off valve 9 is opened and compressed air enters the expansion chamber 11 from the compressed air pipe 6, the compressed air is diverted by the double spiral plates 8 and 8, and is forced by the double spiral plates 8 and 8 and spiraled. The inner diameter squeezed portion 3 ′ is swung from the expanded diameter portion 3 ″ while turning toward the plates 8, 8, and is further discharged to the compressed air outlet 3 and moved from the outflow interval t toward the center line c. The coating material 1 is discharged in a swirling state outward from the outlet 2 by swirling compressed air discharged from the jet outlet 3.

  The swirl release coating material 1 is painted with small irregularities formed on the surface to be coated.

  In the figure, reference numeral 13 denotes a laterally large-diameter outlet sharing the center line c formed at the bottom of the hopper 5, 14 is a lateral cap screwed to the outlet 13, and the outlet 2 is the above-mentioned of the cap 14. An opening is made around the center line c.

  In this invention, it utilizes as a spray coating apparatus, such as a cement concrete wall surface, an iron frame, a steel frame, a bridge.

It is a vertical side view which shows the coating material spraying apparatus of this invention. It is a partially expanded vertical side view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spray coating material 2 Outlet 3 Compressed air outlet 3 'Inner diameter squeezing part 3 "Taper-shaped enlarged part c Common center line 4 Spiral air swirler 5 Reservoir hopper 5' Lower end part 6 Sideways compressed air pipe 8 Double helix Board

Claims (4)

A compressed air outlet is arranged on the common center line inside the spray coating material outlet,
Supporting a spiral air swirler on a common center line inside the air spout,
A coating material spraying apparatus characterized in that compressed air is swirled and jetted from the coating material outlet.   The outlet is opened laterally on the center line at the lower end of the spray coating material storage hopper, and the inner diameter of the outlet and the inner diameter of the air outlet are substantially the same. The coating material spraying apparatus according to claim 1, wherein an outflow interval is interposed between the coating material spraying apparatus and the coating material spraying apparatus.   The air jet opening is opened at the tip of the laterally compressed air tube, a tapered enlarged diameter portion is formed inside the jet outlet via an inner diameter squeezed portion, and the swirler is supported on the entrance side of the enlarged diameter portion. The coating material spraying apparatus according to claim 1 or 2. The coating material spraying device according to any one of claims 1 to 3, wherein the swirler forms a double spiral plate around the center line.

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