Polyurethane pouring gun nozzle

Abstract

A polyurethane pouring gun nozzle comprises a pipe body, one end of the pipe body is an input end, the other end of the pipe body is an output end, an interlayer gap is formed in the pipe body, an air pipe connector communicated with the interlayer gap is arranged on the outer wall of the pipe body, and a plurality of blowing holes communicated with the interlayer gap are formed in the inner wall of the pipe body. According to the principle, the interlayer gap is additionally formed in the inner wall of the pipe body, the air blowing holes are formed in the inner wall of the gun nozzle, an external air source can supply air to all the air blowing holes only through the interlayer gap, and the structure is simple and easy to achieve; the more the blowing holes are, the larger the blowing cleaning can be carried out, so that the residues in the gun nozzle can be cleaned up.

Description

Technical Field

[0001] The utility model relates to the technical field of polyurethane foaming, in particular to a polyurethane perfusion gun nozzle. Background Art

[0002] The polyurethane foaming machine's injection gun can be used to inject the foaming material into the panel's mold cavity, completing the foaming material injection process. The injection gun generally includes a gun head body and a gun nozzle. For example, Chinese Patent Publication No. CN220973107U discloses a foaming machine gun head, which includes a gun head body and a gun nozzle. The gun head body is provided with a plurality of input connectors on one side, and an output connector on the other side. The input connectors and the output connectors are connected through a flow channel within the gun head body, and the gun nozzle is movably connected to the output connector. The gun head body is provided with an air supply pipe, which is connected to the gun nozzle. High-pressure gas is introduced into the gun nozzle through the air supply pipe. The high-pressure gas can clean the residue in the gun nozzle. However, since there is only one air supply point and the gun nozzle is in the shape of a long tube, the introduced high-pressure gas cannot completely clean the residue on the inner wall. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a polyurethane perfusion gun nozzle, which can clean the residue in the gun nozzle.

[0004] To address the above-mentioned technical problems, the present invention provides a technical solution: a polyurethane injection nozzle comprising a tube body, one end of the tube body being an input end and the other end being an output end. The tube body is provided with an inner interlayer gap, the outer wall of the tube body is provided with an air pipe joint connected to the inner interlayer gap, and the inner wall of the tube body is provided with a plurality of air holes connected to the inner interlayer gap. The principle of the present invention is to add an inner interlayer gap to the inner wall of the tube body and provide a plurality of air holes on the inner wall of the nozzle. An external air source can supply air to all the air holes simply through the inner interlayer gap. This structure is simple and easy to implement. More air holes allow for a wider range of cleaning, thereby effectively removing residues from the nozzle.

[0005] As an improvement, an air pipe is provided in the interlayer gap along the length direction of the tube body, and the air pipe joint and the blowing hole are both connected to the air pipe.

[0006] As an improvement, the blowing holes are inclined to discharge air.

[0007] As an improvement, blowing holes are provided on both symmetrical sides of the tube body.

[0008] As an improvement, the blowing holes are arranged in a straight line.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] An interlayer gap is added to the inner wall of the tube body, and a plurality of blowing holes are set on the inner wall of the gun nozzle. The external air source can supply air to all the blowing holes only through the interlayer gap. This structure is simple and easy to implement. The more blowing holes there are, the larger the range can be for blowing and cleaning, so the residue in the gun nozzle can be cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the utility model.

[0012] Figure 2 It is a longitudinal sectional view of the present utility model.

[0013] Figure 3 It is a transverse sectional view of the utility model. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] like Figure 1 、 2 The figure shows a polyurethane injection nozzle, which is connected to a gun head and is used to inject polyurethane foam material. The nozzle is tubular and includes a tube body 1. One end of the tube body 1 is the input end and connects to the gun head. The other end of the tube body 1 is the output end. The output end is flat and trumpet-shaped, which can spray polyurethane material over a wider range. An interlayer gap 3 is provided in the tube body 1, and the interlayer gap 3 is annular, so that the tube body 1 has a sandwich structure of an outer wall and an inner wall in a certain section, and the sandwich structure and the tube body 1 can be integrally formed through 3D printing; the outer wall of the tube body 1 is provided with an air pipe joint 2 connected to the interlayer gap 3, and the air pipe joint 2 can be quickly connected to the air pipe to realize external connection to an external gas source. A manual switch or an electromagnetic switch can be set at the air pipe joint 2 to realize manual or brake-on high-pressure gas cleaning function; a number of blowing holes 4 connected to the interlayer gap 3 are provided on opposite sides of the inner wall of the tube body 1, and the blowing holes 4 on each side are arranged in a straight line, and the blowing holes 4 are arranged along the length direction of the tube body 1. The more blowing holes 4 there are, the more area that can be cleaned and the better the cleaning effect; the blowing holes 4 are inclined to discharge air, and the high-pressure gas is tangent to the inner wall of the tube body 1, which can form a cyclone in the tube body 1, effectively blowing off the foaming material adhering to the inner wall. Figure 3 As shown, a metal air tube 5 can be set in the interlayer gap 3. The metal air tube 5 is set along the length direction of the tube body 1, and the metal air tube 5 is set on the inner wall of both sides of the tube body 1. The metal air tube 5 and the tube body 1 are integrally formed by 3D printing. This structure is suitable for a gun nozzle with a longer length. The metal air tube 5 can not only be provided with multiple blowing holes 4 for air outlet, but also can serve as a built-in skeleton of the gun nozzle; the air tube joint 2 and the blowing hole 4 are both connected to the metal air tube 5, and the metal air tubes 5 on both sides are connected through the interlayer gap 3.

[0016] The principle of the utility model is as follows: an interlayer gap 3 is added to the inner wall of the tube body 1, and a plurality of blowing holes 4 are provided on the inner wall of the gun nozzle. The external air source can supply air to all the blowing holes 4 only through the interlayer gap 3. The structure is simple and easy to implement. The more blowing holes 4 there are, the larger the range can be for blowing and cleaning, so the residue in the gun nozzle can be cleaned.

Claims

1. A polyurethane injection nozzle, comprising a tube body, one end of the tube body being an input end and the other end of the tube body being an output end, characterized in that: An interlayer gap is provided in the tube body, an air pipe joint communicating with the interlayer gap is provided on the outer wall of the tube body, and a plurality of blowing holes communicating with the interlayer gap are provided on the inner wall of the tube body.

2. The polyurethane perfusion nozzle according to claim 1, characterized in that: An air pipe is provided in the interlayer gap along the length direction of the tube body, and the air pipe joint and the air blowing hole are both communicated with the air pipe.

3. The polyurethane injection nozzle according to claim 1, characterized in that: The air blowing holes are inclined to discharge air.

4. The polyurethane perfusion gun nozzle according to claim 1, characterized in that: Blowing holes are provided on symmetrical sides of the tube body.

5. The polyurethane perfusion gun nozzle according to claim 1, characterized in that: The air blowing holes are arranged in a straight line.

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