Portable two-component polyurethane foam spray gun

Abstract

This utility model discloses a portable two-component polyurethane foam spray gun, including a spray gun body. Two raw material channels are located at the rear of the spray gun body, and these channels are connected to a pressurized glue tank via connecting pipes. A vertical valve channel is located in the middle of the spray gun body, and a valve stem plug is installed on the spray gun body to seal the top of the valve channel. A valve core is installed inside the valve channel. Two flow channels are located at the front of the spray gun body, below the raw material channels, with the flow channel inlets connected to the corresponding valve channels. A handle is installed on the spray gun body located below the raw material channels. An actuation component is located at the lower front of the spray gun body to lift the valve core and open the valve channel. A spray nozzle is installed at the front of the spray gun body. This utility model has a simple structure and is easy to operate. By setting a vertical valve channel and valve core inside the spray gun body, and sealing the top of the valve channel with a valve stem plug, the spray gun's sealing performance can be well guaranteed, preventing leakage during the flow of the glue components.

Description

Technical Field

[0001] This utility model relates to the field of spray gun technology, specifically to a portable two-component polyurethane foam spray gun. Background Technology

[0002] Polyurethane foam is used for packaging, insulation, and the molding and coating of products. Currently, polyurethane foam agents on the market include single-component and two-component types. Two-component polyurethane foam is sprayed out after being mixed in a mixing tube in the nozzle under the pressure of a pressurized glue can through a separate channel in the spray gun. At present, in order to facilitate spraying operations, most spray guns on the market adopt electric or pneumatic driving operation. However, this structure depends on the power and air source, which is not suitable for scenarios where the power or air source cannot be connected. Therefore, a portable spray gun that can be sprayed without the aid of power or air source is needed.

[0003] Currently, in two-component spray guns, the two components of the adhesive are controlled by separate valves. However, if the valves are not properly sealed during installation, leakage of the adhesive components inside the spray gun may occur. To address this issue, Chinese utility model patent application number 2021222564882 discloses a spraying tool, including a tool body, a hose, and a barrier component. The hose is disposed on the tool body and has a barrier position. The barrier component is installed on the tool body and can squeeze the barrier position of the hose. By controlling the degree of squeezing of the hose by the barrier component, the flow area of ​​the sprayed material at the barrier position of the hose can be changed, thereby changing the amount of material sprayed per unit time through the spraying tool. This application uses a barrier component to compress the hose from the outside. Since there is no connection between the barrier component and the hose, there are no issues with cracks or poor sealing, effectively eliminating the risk of material leakage within the spraying tool and making it safer and more reliable. However, because the spray volume is controlled by the pressure of the hose with the barrier component, long-term pressure and friction between the hose and the barrier component can easily cause damage to the hose itself, increasing the risk of leakage and the cost of the connecting pipe. Since the barrier component is fitted on the outer wall of the hose, when multi-component adhesives are mixed and sprayed, each time the hose flow is controlled, the two barrier components need to be adjusted separately, which is relatively cumbersome. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a portable two-component polyurethane foam spray gun, which can solve the problem of easy leakage of the adhesive component in the spray gun, ensure the sealing of the spray gun, simplify the operation steps, and improve the spraying efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0006] A portable two-component polyurethane foam spray gun includes a spray gun body with two horizontally arranged raw material channels at the rear, connected to a pressurized glue tank via connecting pipes. A vertical valve channel, connected to the corresponding raw material channel, is located in the middle of the spray gun body. A valve stem plug, sealing the top of the valve channel, is mounted on the spray gun body, and a valve core, used to seal the valve channel, is installed inside. Two horizontally arranged flow channels are located at the front of the spray gun body, below the raw material channels, with their inlets connected to the corresponding valve channels. A handle is mounted on the spray gun body below the raw material channels. An actuation component, which lifts the valve core to open the valve channel, is located at the lower front of the spray gun body. A spray nozzle is mounted at the front of the spray gun body.

[0007] The aforementioned portable two-component polyurethane foam spray gun includes a pressing handle hinged to a hinged seat at the lower front end of the spray gun body. The top surface of the pressing handle is connected to the lower part of the valve core, and the top surface of the pressing handle is inclined downwards.

[0008] The aforementioned portable two-component polyurethane foam spray gun has a torsion spring installed between the pressing handle and the grip to automatically reset the pressing wrench.

[0009] The aforementioned portable two-component polyurethane foam spray gun includes a spray head comprising a mixing tube connected to the main body of the spray gun and a nozzle disposed at the front end of the mixing tube. The mixing tube is equipped with a threaded rotating rod that mixes the two component adhesives flowing out from the two channels respectively under air pressure.

[0010] The aforementioned portable two-component polyurethane foam spray gun has a nozzle with a flat nozzle outlet.

[0011] The aforementioned portable two-component polyurethane foam spray gun has a nozzle with a round nozzle outlet.

[0012] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0013] This invention provides a portable two-component polyurethane foam spray gun with a simple structure and easy operation. The spraying can be completed manually without the need for an external control system such as a power supply or air source.

[0014] Meanwhile, by setting a vertical valve channel connecting the glue tank and the flow channel inside the spray gun body, and a valve core fitted with the valve channel, and sealing the top of the valve channel with a valve stem plug, the sealing performance of the spray gun can be well guaranteed, avoiding leakage during the flow of glue components. Moreover, the connecting pipe is connected to the raw material channel at the tail end of the spray gun body, and the valve channel is opened by lifting the valve core through the starting component, without pressurizing the connecting pipe, thus avoiding damage to the connecting pipe.

[0015] Because the two valve cores are arranged vertically side by side, and the bottom of each valve core is connected to the top inclined surface of the press handle in the starting assembly, when the press handle is pressed, the press handle will lift up both valve cores at the same time, so that both valve channels open simultaneously. There is no need to set up a separate starting assembly for each valve core, making the operation more convenient and faster, and improving the spraying efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the specific structure of Example 1;

[0017] Figure 2 This is a top view of Example 1;

[0018] Figure 3 for Figure 2 Sectional view along line AA in the middle;

[0019] Figure 4 for Figure 2 BB-direction sectional view in the middle;

[0020] Figure 5 A schematic diagram of the spray gun's main body;

[0021] Figure 6 This is a schematic diagram of the specific structure of the nozzle in Example 1;

[0022] Figure 7 This is a schematic diagram of the internal structure of the nozzle;

[0023] Figure 8 This is a schematic diagram of the specific structure of Example 2;

[0024] Figure 9 This is a schematic diagram of the specific structure of the nozzle in Example 2.

[0025] The components are: 1. Spray gun body, 2. Handle, 3. Mixing tube, 4. Raw material channel, 5. Valve stem plug, 6. Valve core, 7. Flow channel, 8. Hinge seat, 9. Press handle, 10. Nozzle, 11. Glue outlet, 12. Threaded rotating rod. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Example

[0027] Portable two-component polyurethane foam spray gun, such as Figures 1 to 7As shown, the spray gun body 1 includes two horizontally arranged raw material channels 4 at the tail end of the spray gun body 1. The raw material channels 4 are connected to the pressurized glue tank through connecting pipes. A vertical valve channel is provided in the middle of the spray gun body 1, which is connected to the corresponding raw material channel 4. A valve stem plug 5 is provided on the spray gun body 1 to seal the top of the valve channel. A valve core 6 is installed inside the valve channel to seal the valve channel. Two horizontally arranged flow channels 7 are provided at the front end of the spray gun body 1. The flow channels 7 are located below the raw material channels 4. The glue inlet of the flow channel 7 is connected to the corresponding valve channel.

[0028] A handle 2 is installed on the spray gun body 1 located below the raw material channel 4, and an activation component is provided at the lower front end of the spray gun body 1 to lift the valve core 6 and open the valve channel.

[0029] In this embodiment, the starting component includes a pressing handle 9 that is hinged to the hinge seat 8 at the lower front end of the spray gun body 1. A torsion spring is installed between the pressing handle 9 and the grip 2, which can drive the pressing handle 9 to automatically reset.

[0030] The top surface of the pressing handle 9 is connected to the lower part of the valve core 6. The top surface of the pressing handle 9 is tilted downwards, which can smoothly lift the valve core during the rotation of the pressing handle 9, thereby opening the valve channel and allowing both component adhesives to flow from the valve channel into the flow channel 7.

[0031] In other embodiments, the actuation component may also be selected from other valve passage structures that can lift the valve core 6 upward to open it, such as linear slide rail lifting mechanism, lead screw and nut structure, etc.

[0032] The spray gun body 1 has a spray head installed at the front end. In this embodiment, the spray head is snapped into the spray gun body 1 through a connecting part. The interior of the connecting part is spaced apart from the front end face of the spray gun body 1 to facilitate the flow of the adhesive component in the flow channel into the interior of the spray head. In other embodiments, the connecting part and the front end of the spray gun body 1 can also be connected by a threaded connection or other connection methods to facilitate assembly and disassembly.

[0033] The nozzle includes a mixing tube 3 connected to the spray gun body 1 and a nozzle 10 disposed at the front end of the mixing tube 3. A threaded rotating rod 12 is installed inside the mixing tube 3 to mix the two component adhesives flowing out from the two flow channels 7 respectively under air pressure.

[0034] In this embodiment, the glue outlet 11 of the nozzle 10 is set to a flat nozzle shape. Setting the glue outlet to a flat nozzle shape makes the glue outlet relatively narrow, which makes it easier to control the amount of glue and makes the construction effect more precise.

[0035] The method of using this utility model is as follows:

[0036] First, connect the connecting pipe to the corresponding glue tank at the raw material channel 4. Then, press the pressing handle 9 while holding the handle 2, so that the pressing handle rotates in the direction of the handle. During the rotation, the top surface of the pressing handle will move upward in an arc path, pushing the valve core 6 on the top surface upward, so that the valve channel is connected to the raw material channel 4. The glue component delivered to the raw material channel 4 through the connecting pipe will flow into the flow channel 7 through the valve channel.

[0037] By controlling the pressing pressure, the flow rate of the adhesive component flowing into the valve channel can also be controlled. When the pressing handle is pressed to the limit position, the valve core is pushed to the highest position, and the raw material channel is fully connected with the valve channel. At this time, the flow rate in the valve channel is the fastest.

[0038] The two adhesive components flow out of their respective flow channels 7 and enter the mixing tube 3, where they mix with the threaded rotating rod 12. The mixed adhesive components are then sprayed out from the outlet 11 of the nozzle 10.

[0039] After spraying is completed, release the pressing handle. The valve core will automatically reset under gravity and close the valve passage, preventing the adhesive components from continuing to be delivered into the spray gun.

[0040] The spray gun body 1, valve channel, raw material channel, and flow channel are integrally molded, which will prevent the leakage of adhesive components due to poor internal sealing of the spray gun.

[0041] The valve stem plug 5 at the top of the valve channel can be integrally formed with the spray gun body 1, or it can be detachably connected to the spray gun body 1 to seal the top of the valve channel. Example

[0042] Based on Example 1, such as Figures 8 to 9 As shown, the nozzle 10 has a round nozzle 11 with a wider and deeper nozzle, which is suitable for quickly spraying or brushing glue over a large area, thus improving construction efficiency.

[0043] This invention provides a portable two-component polyurethane foam spray gun with a simple structure and easy operation. The spraying can be completed manually without the need for an external control system such as a power supply or air source.

[0044] Meanwhile, by setting a vertical valve channel connecting the glue tank and the flow channel inside the spray gun body and a valve core fitted with the valve channel, the sealing performance of the spray gun can be well guaranteed, avoiding leakage during the flow of glue components. Moreover, the connecting pipe is connected to the raw material channel at the tail end of the spray gun body, and the valve channel is opened by lifting the valve core through the starting component, without pressurizing the connecting pipe, thus avoiding damage to the connecting pipe.

[0045] Because the two valve cores are arranged vertically side by side, and the bottom of each valve core is connected to the top inclined surface of the press handle in the starting assembly, when the press handle is pressed, the press handle will lift up both valve cores at the same time, so that both valve channels open simultaneously. There is no need to set up a separate starting assembly for each valve core, making the operation more convenient and faster, and improving the spraying efficiency.

Claims

1. A portable two-component polyurethane foam spray gun, characterized in that: The spray gun body (1) includes two horizontally arranged raw material channels (4) at the tail end of the spray gun body (1), which are connected to a pressurized glue tank through a connecting pipe; a vertical valve channel connected to the corresponding raw material channel (4) is provided in the middle of the spray gun body (1); a valve stem plug (5) is provided on the spray gun body (1) to seal the top of the valve channel; a valve core (6) is installed inside the valve channel to seal the valve channel; two horizontally arranged flow channels (7) are provided at the front end of the spray gun body (1), which are located below the raw material channel (4); the glue inlet of the flow channel (7) is connected to the corresponding valve channel; a handle (2) is installed on the spray gun body (1) located below the raw material channel (4); a starting component is provided at the lower front end of the spray gun body (1) to lift the valve core (6) and open the valve channel; and a spray nozzle is installed at the front end of the spray gun body (1).

2. The portable two-component polyurethane foam spray gun according to claim 1, characterized in that: The starting component includes a pressing handle (9) hinged to a hinge seat (8) at the lower front end of the spray gun body (1). The top surface of the pressing handle (9) is connected to the lower part of the valve core (6), and the top surface of the pressing handle (9) is inclined downward.

3. The portable two-component polyurethane foam spray gun according to claim 2, characterized in that: A torsion spring is installed between the pressing handle (9) and the grip (2) to automatically reset the pressing handle (9).

4. The portable two-component polyurethane foam spray gun according to claim 1, characterized in that: The nozzle includes a mixing tube (3) connected to the spray gun body (1) and a nozzle (10) located at the front end of the mixing tube (3). The mixing tube (3) is equipped with a threaded rotating rod (12) that mixes the two component adhesives flowing out from the two channels (7) respectively under air pressure.

5. The portable two-component polyurethane foam spray gun according to claim 4, characterized in that: The nozzle (10) has a flat nozzle-shaped outlet (11).

6. The portable two-component polyurethane foam spray gun according to claim 4, characterized in that: The nozzle (10) has a round nozzle-shaped outlet (11).

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