Polyurethane polyurea spray gun with adjustable spray effect

Abstract

The utility model relates to polyurethane polyurea spray gun technical field, concretely is a kind of polyurethane polyurea spray gun of adjustable spraying effect, including gun body, the rear end of gun body is fixedly connected with cylinder, and cylinder includes cylinder body;The rear end of cylinder body is connected with the limiting device capable of limiting piston to move backwards, and limiting device includes the movable rod of the rear end sliding seal connection with cylinder body, the limiting seat of fixedly connected in cylinder body, the front end of movable rod is equipped with clamping block, and rear end is equipped with movable rod knob;Clamping block is located in the inside of cylinder body, and knob is located in the outside of cylinder body;Limiting seat is located at the rear of clamping block, and the first clamping groove and second clamping groove with opening towards clamping block are equipped on limiting seat, and the depth of first clamping groove is greater than second clamping groove;Clamping block can be engaged with first clamping groove and second clamping groove;Movable rod is equipped with movable rod hole through its front and rear direction, and the length of adjusting rod is greater than movable rod with being screw-connected in movable rod hole;By setting adjusting rod, spraying effect can be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of polyurethane polyurea spray gun technology, specifically a polyurethane polyurea spray gun with adjustable spraying effect. Background Technology

[0002] Both polyurethane and polyurea are formed by the reaction of two liquid chemical raw materials. Polyurethane is formed by the reaction of polyols and isocyanates, while polyurea is formed by the reaction of isocyanates and amine compounds. The two materials are mixed in the mixing chamber of the spray gun and then sprayed out. The mixing chamber is movably connected to the spray gun body and is driven by a cylinder. Both the mixing chamber and the spray gun body have feed channels. When the feed channels on the mixing chamber and the spray gun body completely overlap, the material enters the mixing chamber, mixes, and is then sprayed out. When the feed channels on the mixing chamber and the spray gun body are completely misaligned, the material cannot enter the mixing chamber, and the spraying stops. Current spray guns only have two relative positions for the feed channels on the mixing chamber and the spray gun body: complete overlap and complete misalignment. This makes it impossible to adjust the spraying effect. Utility Model Content

[0003] The main objective of this invention is to provide a polyurethane / polyurea spray gun with adjustable spraying effect, in order to solve the problem that in the prior art, the feed channels on the mixing chamber and the feed channels on the gun body have only two relative positions: complete overlap and complete misalignment, and the spraying effect of the spray gun cannot be adjusted.

[0004] To achieve the above objectives, this utility model provides a polyurethane / polyurea spray gun with adjustable spraying effect, comprising a gun body, a mixing chamber slidably connected to the front end of the gun body, and a cylinder fixedly connected to the rear end of the gun body; the cylinder includes a cylinder body, a piston movably connected to the cylinder body, and a piston rod fixedly connected to the piston; the mixing chamber is fixedly connected to the front end of the piston rod; a limiting device that restricts the rearward movement of the piston is connected to the rear end of the cylinder body, the limiting device including a movable rod slidably and sealingly connected to the rear end of the cylinder body, and a limiting seat fixedly connected to the inside of the cylinder body; a locking block is provided at the front end of the movable rod, and a movable rod knob is provided at the rear end; the locking block is located inside the cylinder body, and the knob is located outside the cylinder body; the limiting seat is located behind the locking block, and the limiting seat has a first locking groove and a second locking groove with openings facing the locking block, the depth of the first locking groove being greater than that of the second locking groove; the locking block can engage with the first locking groove and the second locking groove; the movable rod has a movable rod hole penetrating its front-to-back direction, and an adjusting rod is threadedly connected to the movable rod hole, the length of the adjusting rod being greater than that of the movable rod.

[0005] Furthermore, a nut is threaded onto the movable rod.

[0006] Furthermore, the internal thread of the nut has the same direction and specifications as the internal thread of the movable rod.

[0007] Furthermore, an adjustment knob is provided at the rear end of the adjustment rod.

[0008] Furthermore, the mixing chamber is equipped with a mixing cavity, a nozzle connected to the mixing cavity, and two material inlet channels to the mixing cavity, while the gun body is equipped with two material inlet channels to the gun body.

[0009] Furthermore, a gun handle is fixedly connected to the bottom of the cylinder, and a trigger that controls the extension and retraction of the cylinder is hinged to the gun handle.

[0010] Furthermore, a spring is provided between the movable lever knob and the cylinder body, and the spring provides the elastic force to move the movable lever backward.

[0011] This utility model discloses a polyurethane / polyurea spray gun with adjustable spraying effect. When the piston rod of the cylinder retracts, the spray gun starts spraying, and when the piston rod extends, the spray gun stops spraying. By setting an adjustment rod, the limit position when the cylinder retracts can be adjusted, so that the material inlet channel and the material inlet mixing chamber channel partially overlap. Furthermore, the size of the overlap area between the material inlet channel and the material inlet mixing chamber channel can be adjusted, thereby adjusting the spraying effect.

[0012] The larger the overlap area between the material inlet channel and the material inlet mixing chamber channel, the more material passes through, the more material is mixed, and the larger the release and diffusion area after compression. Conversely, a small overlap area will result in a smaller amount of raw material passing through, leading to a relatively smaller amount of mixed material and a smaller final spray diffusion area.

[0013] This invention uses a nut to position the adjusting rod, ensuring that it returns to its original position and coating effect after being moved. By matching the internal thread direction and specifications of the nut with those of the movable rod, the nut locks the adjusting rod in place, preventing it from loosening after impact. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0015] Figure 1 This is a cross-sectional structural diagram of the gun body and cylinder in the embodiment;

[0016] Figure 2 This is a schematic diagram of the structure of the limiting device in the embodiment;

[0017] Figure 3 This is a front view schematic diagram of the polyurethane polyurea spray gun with adjustable spraying effect in the embodiment.

[0018] In the diagram: 1. Gun body; 101. Material inlet channel; 2. Mixing chamber; 201. Mixing cavity; 202. Material inlet channel; 203. Nozzle; 3. Cylinder; 301. Cylinder body; 302. Piston; 303. Piston rod; 4. Limiting device; 401. Movable rod; 401a. Locking block; 401b. Movable rod knob; 402. Limiting seat; 402a. First locking slot; 402b. Second locking slot; 5. Adjusting rod; 501. Adjusting rod knob; 6. Nut; 7. Gun handle; 8. Trigger; 9. Spring. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] like Figures 1 to 3 As shown in the embodiment of this utility model, a polyurethane / polyurea spray gun with adjustable spraying effect is provided, including a gun body 1. A mixing chamber 2 is slidably connected to the front end of the gun body 1, and a cylinder 3 is fixedly connected to the rear end of the gun body 1. The cylinder includes a cylinder body 301, a piston 302 is movably connected inside the cylinder body 301, and a piston rod 303 is fixedly connected to the piston 302. The mixing chamber 2 is fixedly connected to the front end of the piston rod 303. A limiting device 4 that can restrict the rearward movement of the piston 302 is connected to the rear end of the cylinder body 301.

[0021] like Figure 1 As shown, the mixing chamber 2 is provided with a mixing cavity 201, a nozzle 203 communicating with the mixing cavity 201, and two material inlet mixing cavity channels 202. The nozzle 203 is located at the front end of the mixing cavity 201, and the two material inlet mixing cavity channels 202 are symmetrically arranged at the left and right ends of the mixing cavity 201. The gun body 1 is provided with two material inlet gun body channels 101, and the ends of the material inlet gun body channels 101 abut against the mixing chamber 2.

[0022] like Figure 1 and Figure 2As shown, the limiting device 4 includes a movable rod 401 that is slidably and sealingly connected to the rear end of the cylinder body 301, and a protruding limiting seat 402 that is fixedly connected to the inner side of the rear end cover of the cylinder body 301. The front end of the movable rod 401 is provided with a square locking block 401a, and the rear end is provided with a movable rod knob 401b. The locking block 401a is located inside the cylinder body 301, and the knob 401b is located outside the rear end cover of the cylinder body 301. The limiting seat 402 is located behind the locking block 402. The limiting seat 402 is provided with a first locking groove 402a and a second locking groove 402b with openings facing the locking block 401a. The depth of the first locking groove 402a is greater than that of the second locking groove 402b. The locking block 401a can engage with the first locking groove 402a and the second locking groove 402b. The movable rod 401 is provided with a movable rod hole that runs through its front and rear directions. An adjusting rod 5 is threadedly connected inside the movable rod hole. The length of the adjusting rod 5 is greater than that of the movable rod 401.

[0023] When the locking block 401a is locked in the second locking slot 402b, the locking block 401a restricts the piston 302 from moving backward, so that the material inlet gun body channel 101 and the material inlet mixing chamber channel 202 cannot overlap, locking the spray gun in a state where it cannot spray; when the locking block 401a is locked in the first locking slot 402a, the locking is released, the material inlet gun body channel 101 and the material inlet mixing chamber channel 202 can overlap, and the spray gun can spray.

[0024] like Figure 1 As shown, the rear end of the adjusting rod 5 is provided with an adjusting rod knob 501, which facilitates the movement and rotation of the adjusting rod 5.

[0025] like Figure 3 As shown, a gun handle 7 is fixedly connected to the bottom of the cylinder 3, and a trigger 8 for controlling the extension and retraction of the cylinder 3 is hinged to the gun handle 7.

[0026] like Figure 3 As shown, a spring 9 is provided between the movable lever knob 401b and the cylinder 301, and the spring 9 provides a spring force to move the movable lever 401 backward.

[0027] like Figure 1 and Figure 2 As shown, in some embodiments, a nut 6 is threaded onto the movable rod 401; the internal thread of the nut 6 has the same direction and specification as the internal thread of the movable rod 401.

[0028] By setting nut 6, the adjusting rod 5 can be positioned, thus ensuring that after the adjusting rod 5 moves, it can return to its original position, and the spray gun can return to its original spraying effect. By making the internal thread of nut 6 the same as the internal thread of movable rod 4 in terms of direction and specification, nut 6 can lock the adjusting rod 5, preventing the adjusting rod 5 from loosening after being impacted.

[0029] In some embodiments, the adjusting rod 5 is threaded to the rear end of the movable rod 4, and the adjusting rod 5 is slidably and sealingly connected to the front end of the movable rod 4.

[0030] In this embodiment, the polyurethane / polyurea spray gun with adjustable spraying effect is activated when the spray gun trigger is pressed and the piston rod 303 of the cylinder 3 retracts, causing the material inlet channel 101 and the material inlet mixing chamber channel 202 to overlap, and the spray gun begins spraying. When the spray gun trigger is released and the piston rod 303 of the cylinder 3 extends, the material inlet channel 101 and the material inlet mixing chamber channel 202 to misalign, and the spray gun stops spraying. The limiting device 4 can only lock the spray gun in a state where it cannot spray, or unlock it to allow the spray gun to spray; the spraying effect cannot be adjusted.

[0031] By setting the adjusting rod 5, the length of the adjusting rod 5 extending in front of the locking block 401a can be controlled. The adjusting rod 5 can block the piston 302, thereby adjusting the limit position of the piston rod 303 of the cylinder 3 when it retracts, so that the material inlet gun channel 101 and the material inlet mixing chamber channel 202 partially overlap, and the size of the overlapping area of ​​the material inlet gun channel 101 and the material inlet mixing chamber channel 202 can be adjusted, thereby achieving the purpose of adjusting the spraying effect.

[0032] The larger the overlap area between the material inlet gun channel 101 and the material inlet mixing chamber channel 202, the more material passes through, the more material is mixed, and the larger the release and diffusion area after compression. Conversely, a small overlap area will result in a small amount of raw material passing through, resulting in a relatively small amount of mixed material and a small final spray diffusion area.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A polyurethane / polyurea spray gun with adjustable spraying effect, comprising a gun body (1), wherein a mixing chamber (2) is slidably connected to the front end of the gun body (1), and a cylinder (3) is fixedly connected to the rear end of the gun body (1); the cylinder comprises a cylinder body (301), wherein a piston (302) is movably connected to the cylinder body (301), and a piston rod (303) is fixedly connected to the piston (302); wherein the mixing chamber (2) is fixedly connected to the front end of the piston rod (303); characterized in that, The rear end of the cylinder (301) is connected to a limiting device (4) that restricts the rearward movement of the piston (302). The limiting device (4) includes a movable rod (401) that is slidably and sealingly connected to the rear end of the cylinder (301) and a limiting seat (402) fixedly connected inside the cylinder (301). The movable rod (401) has a locking block (401a) at its front end and a movable rod knob (401b) at its rear end. The locking block (401a) is located inside the cylinder (301), and the knob (401b) is located outside the cylinder (301). The limiting seat (402) is fixedly connected to the rear end of the cylinder (301). Located behind the locking block (401a), the limiting seat (402) is provided with a first locking groove (402a) and a second locking groove (402b) with the opening facing the locking block (401a). The depth of the first locking groove (402a) is greater than that of the second locking groove (402b). The locking block (401a) can be engaged with the first locking groove (402a) and the second locking groove (402b). The movable rod (401) is provided with a movable rod hole that runs through its front and rear directions. An adjusting rod (5) is threaded into the movable rod hole. The length of the adjusting rod (5) is greater than that of the movable rod (401).

2. The polyurethane polyurea spray gun with adjustable spraying effect as described in claim 1, characterized in that, A nut (6) is threaded onto the movable rod (401).

3. The polyurethane polyurea spray gun with adjustable spraying effect as described in claim 2, characterized in that, The internal thread of the nut (6) has the same direction and specification as the internal thread of the movable rod (401).

4. The polyurethane polyurea spray gun with adjustable spraying effect as described in claim 1, characterized in that, The rear end of the adjusting rod (5) is provided with an adjusting rod knob (501).

5. The polyurethane polyurea spray gun with adjustable spraying effect as described in claim 1, characterized in that, The mixing chamber (2) is provided with a mixing cavity (201), a nozzle (203) connected to the mixing cavity (201) and two material inlet channels (202), and the gun body (1) is provided with two material inlet channels (101).

6. The polyurethane polyurea spray gun with adjustable spraying effect as described in claim 1, characterized in that, The bottom of the cylinder (3) is fixedly connected to the gun handle (7), and the gun handle (7) is hinged to a trigger (8) for controlling the extension and retraction of the cylinder (3).

7. The polyurethane polyurea spray gun with adjustable spraying effect as described in claim 1, characterized in that, A spring (9) is provided between the movable rod knob (401b) and the cylinder (301), the spring (9) providing a spring force to move the movable rod (401) backward.

Images