Gluing gun head and gluing device

Abstract

The utility model relates to the technical field of gluing tools, particularly provides a gluing gun head and a gluing device, and aims to solve the problem that the existing gluing device is poor in gluing effect. Therefore, the gluing gun head provided by the utility model comprises a glue conveying pipeline, the gun nozzle is communicated with the glue conveying pipeline, the gun nozzle comprises a first side wall and a second side wall which are oppositely arranged, a glue outlet channel is defined by the first side wall and the second side wall, and the first side wall is in an arc shape, so that a glue strip formed after the coating from the glue conveying pipeline flows through the glue outlet channel is provided with a first arc surface facing the part to be coated. And when the sealing rubber strip sprayed by the gluing gun head is coated on the edge-covering welding seam, an air channel is formed between the arc-shaped surface of the sealing rubber strip and the welding seam. The air channel provides a containing space for air in the gap, so that the air can be gradually released and dissipated, bubbles are prevented from being formed on the surface of the sealing rubber strip, and the sealing performance and the appearance attractiveness of the sealing rubber strip are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of glue coating tools, and specifically provides a glue coating gun head and a glue coating device. Background Art

[0002] Automobile door cover parts generally adopt the hemming process. In this process, the outer and inner panels of the door cover are hemmed or rolled, so that the outer panel is bent and tightly pressed to the inner panel, and glue is applied at the hemming weld. This treatment method can improve the stability and sealing of the door cover structure and prevent the intrusion of external impurities such as moisture and dust.

[0003] In the automotive gluing production line, the glue gun is a commonly used gluing tool, which consists of a gun body and a gun nozzle. Usually, the gun nozzle is designed as a rectangular glue outlet. During the working process, the paint is transported to the spraying station through the glue supply pump, and the glue gun squeezes the paint onto the door cover hemming weld to form a sealing strip with the same shape as the glue outlet. However, since there is air in the gap between the hemming surface and the inner panel in the door cover hemming structure, the rectangular sealing strip fits tightly with the hemming seam. During the baking process, the heat-expanded air easily enters the sealing strip, resulting in bubbles on the surface of the sealing strip. These bubbles seriously affect the sealing performance and anti-corrosion performance of the sealing strip.

[0004] Accordingly, the art needs a new glue coating device to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above technical problems, that is, to solve the problem of poor gluing effect of the existing gluing device during use, especially to solve the problem that bubbles are easily formed in the sealing strip during baking, affecting the sealing performance and anti-corrosion performance.

[0006] In a first aspect, the utility model provides a glue gun head, comprising:

[0007] Rubber pipeline;

[0008] A gun nozzle is connected to the glue delivery pipeline, and the gun nozzle includes a first side wall and a second side wall that are arranged opposite to each other, the first side wall and the second side wall define a glue outlet channel, and the first side wall is arc-shaped so that the glue strip formed by the paint from the glue delivery pipeline after flowing through the glue outlet channel has a first arc surface facing the workpiece to be coated.

[0009] Optionally, the second side wall is arc-shaped, so that the glue strip formed by the paint from the glue delivery pipeline after flowing through the glue outlet channel has a second arc surface facing the workpiece to be coated.

[0010] Optionally, the curvature of the first side wall is the same as the curvature of the second side wall.

[0011] Optionally, a pressure relief port is provided on the second side wall, and the pressure relief port is used to reduce the fluid pressure of the coating when the coating flows through the glue outlet channel.

[0012] Optionally, the width of the orthographic projection of the gun nozzle on the surface of the workpiece to be coated is 8 to 12 mm.

[0013] Optionally, the glue delivery pipeline includes a reducing pipe section, a discharge end of the reducing pipe section is connected to a feed end of the gun nozzle, and a cross-sectional area of ​​the reducing pipe section gradually decreases along the output direction of the coating.

[0014] Optionally, the glue gun head also includes:

[0015] A positioning rod, wherein the positioning rod is arranged on the glue delivery pipeline, and the positioning rod cooperates with the workpiece to be coated so that the gun nozzle moves along a preset trajectory.

[0016] Optionally, the glue gun head also includes:

[0017] A rotating sleeve is rotatably arranged on the rubber conveying pipeline, and the positioning rod is connected to the rotating sleeve.

[0018] Optionally, the glue gun head also includes:

[0019] An elastic member, one end of which is connected to the first end of the rubber delivery pipeline, and the other end of which is connected to the rotating sleeve;

[0020] The second end of the rubber delivery pipe is provided with a plurality of slots along the circumferential direction, the rotating sleeve is provided with a plurality of clamping protrusions cooperating with the slots, and the clamping protrusions are clamped in the slots under the elastic force of the elastic member.

[0021] In a second aspect, the utility model provides a glue coating device, comprising a glue coating gun head as described in any one of the first aspects.

[0022] When the above technical solution is adopted, when the sealing strip sprayed by the glue gun head provided by the utility model is coated on the hemming weld, an air channel is formed between the arc surface of the sealing strip and the weld. This air channel provides a space for the air in the gap to be accommodated, so that the air can be gradually released and dissipated, thereby avoiding the formation of bubbles on the surface of the sealing strip, thereby improving the sealing and appearance of the sealing strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0024] Figure 1 It is a structural schematic diagram of a glue gun head provided by an embodiment of the utility model;

[0025] Figure 2 It is a schematic diagram of the structure of the gun nozzle provided by the embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the first-view structure of a gun nozzle provided by an embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the second viewing angle of the gun nozzle provided by the embodiment of the utility model;

[0028] Figure 5 It is a schematic diagram of the assembly structure of the rotating sleeve and the positioning rod provided in the embodiment of the utility model;

[0029] Figure 6 It is a schematic structural diagram of a second fixing ring provided in an embodiment of the utility model.

[0030] List of reference numerals:

[0031] 1-gun nozzle, 10-glue outlet channel, 11-first side wall, 111-first arc surface, 12-second side wall, 121-second arc surface, 122-pressure relief port, 2-glue delivery pipeline, 21-reducing pipe section, 31-positioning rod, 32-rotating sleeve, 321-clamping protrusion, 33-first fixing ring, 34-second fixing ring, 341-cage, 4-elastic member. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not used to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0033] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the relevant devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, ordinal numbers such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] First, we need to understand the gluing process of automotive door cover parts. During the gluing operation, the paint is transported to the gluing device or spray gun by high pressure, and then the valve of the gluing device or spray gun is opened to spray the paint from the glue outlet of the gun nozzle. The sprayed paint can form a sealing strip to cover the hemming weld, thereby improving the sealing performance and anti-corrosion performance of the weld.

[0036] Please refer to Figure 1-6 The utility model provides a glue coating gun head.

[0037] like Figure 1 As shown in the figure, the glue coating gun head includes a glue delivery pipeline 2 and a gun nozzle 1 connected to the glue delivery pipeline 2. The glue delivery pipeline 2 is used to transport the coating required for the glue coating operation to the gun nozzle 1.

[0038] The nozzle 1 includes a first side wall 11 and a second side wall 12 that are arranged opposite to each other, and the first side wall 11 and the second side wall 12 together enclose a glue outlet channel 10. The glue outlet channel 10 can also be understood as a coating shaping channel, that is, the coating is constrained by the first side wall 11 and the second side wall 12 when passing through the glue outlet channel 10, so the shapes of the first side wall 11 and the second side wall 12 can affect the shape of the sealing strip.

[0039] Specifically, when the glue coating gun head is used normally, the first side wall 11 and the second side wall 12 are respectively located at the lower side wall and the upper side wall of the gun nozzle 1, that is, the first side wall 11 is close to the part to be coated (such as a car door body).

[0040] Furthermore, the first side wall 11 is arc-shaped, and the arc concave direction of the first side wall 11 faces the object to be coated. In this way, when the coating from the glue delivery pipeline 2 flows through the glue outlet channel 10, a rubber strip having a first arc surface 111 can be formed, and the arc surface faces the object to be coated.

[0041] As described in the background art, since there is air in the gap between the edge binding surface and the inner plate in the door cover edge binding structure, this part of air is easy to enter the sealing strip during the baking process of the sealing strip, resulting in bubbles being easily formed in the sealing strip.

[0042] When the sealant strip sprayed from the glue gun head is applied to the hemming weld, an air channel is formed between the curved surface of the sealant strip and the weld. This air channel provides space for the air in the gap to be gradually released and dissipated, thereby avoiding the formation of bubbles on the surface of the sealant strip, thereby improving the sealing and appearance of the sealant strip.

[0043] In one embodiment, the second side wall 12 is also arc-shaped, that is, the second side wall 12 has a second arc surface 121, and the concave direction of the arc is the same as the concave direction of the arc of the first side wall 11, both facing the object to be coated.

[0044] This design enables the coating to form a sealing strip with an arc-shaped cross section after flowing through the glue outlet channel 10 , and the shape of such a sealing strip is more beautiful.

[0045] Furthermore, in order to ensure the sealing performance at the joints between the head and the end of the sealing strip, it is necessary to pre-fill the head and the end of the strip with 3 to 5 cm of glue before applying the glue.

[0046] In one embodiment, if Figure 1-4 As shown, the curvature of the first side wall 11 and the curvature of the second side wall 12 are the same.

[0047] Specifically, the first side wall 11 and the second side wall 12 with the same curvature not only make the nozzle 1 more beautiful, but also help to form a rounded and full sealing strip, making its appearance more uniform and improving the coating quality. In addition, this curved sealing strip can effectively prevent liquid penetration and enhance the sealing performance and anti-corrosion effect of the coating.

[0048] In one embodiment, the nozzle 1 can be customized in different sizes within a certain range according to specific needs to meet different coating requirements.

[0049] Specifically, the width of the orthographic projection of the gun nozzle 1 on the surface of the object to be coated is 8 to 12 mm.

[0050] like Figure 3 As shown, the width of the orthographic projection of the nozzle 1 on the surface of the part to be coated is D1. Based on practical experience and comprehensive consideration of the folding sizes of different automobile doors, the value range of D1 is 8 to 12 mm to ensure that the coating covers the entire target area and to control the amount of glue to a certain extent to avoid excessive or insufficient coating, thereby ensuring the coating quality and appearance effect.

[0051] Furthermore, if Figure 3 As shown, the thickness H of the nozzle 1 is in the range of 0.8 to 1.0 mm, so as to ensure that the thickness of the sealing strip is within an appropriate range, which can provide sufficient sealing performance and maintain the beautiful appearance of the coating.

[0052] Since the coating is transported to the glue delivery pipe 2 under high pressure and ejected from the gun nozzle 1, the ejected fluid has a certain pressure. At the same time, the change in shape from the glue delivery pipe 2 to the glue outlet channel 10 will also affect the pressure of the fluid. The fluid pressure can easily cause the coating to deform at the exit of the gun nozzle 1, thereby causing the shape of the sealing strip to be unstable.

[0053] Therefore, if Figure 1-2 As shown, in one embodiment, a pressure relief port 122 is provided on the second side wall 12. The provision of the pressure relief port 122 can effectively release the pressure generated when the coating flows through the glue outlet channel 10, prevent the coating from flowing too fast or too much, and avoid uneven coating.

[0054] By providing the pressure relief port 122, the flow stability of the paint at the outlet of the gun nozzle 1 can be improved, ensuring that the shape of the sprayed sealing strip is accurate.

[0055] Furthermore, the pressure relief port 122 is a notch provided on the second side wall 12, and the notch runs through the entire wall surface in the width direction of the gun nozzle 1. At this time, the arcuate convex surface of the first side wall 11 serves as a guide surface for the coating fluid to guide the fluid flow.

[0056] Specifically, when spraying the paint, the arc-shaped convex surface of the first side wall 11 acts as a guide surface, allowing the paint to be slowly sprayed onto the weld. Compared with spraying the paint directly onto the weld, the guide surface can make the glue flow more stable, and the air passage between the sealing strip and the weld more uniform, thereby reducing the generation of bubbles in the sealing strip.

[0057] Furthermore, if Figure 4 As shown, the dimension D2 of the pressure relief port 122 along the fluid flow direction can be adjusted between 0 and 2.5 mm.

[0058] In one embodiment, the glue delivery pipeline 2 includes a reducer section 21, the discharge end of the reducer section 21 is connected to the feed end of the gun nozzle 1, and the cross-sectional area of ​​the reducer section 21 gradually decreases along the output direction of the coating.

[0059] Specifically, if Figure 1 and 2 As shown, the reducer is arranged at the connection between the glue delivery pipeline 2 and the gun nozzle 1, the large end of the reducer is connected to the glue delivery pipeline 2, and the small end is connected to the gun nozzle 1. In this way, the pressure of the fluid flowing out of the glue delivery pipeline 2 can slowly adapt to the change in the reducer, which helps to maintain the stability and uniformity of the spraying fluid.

[0060] In one embodiment, the glue gun head further includes a positioning rod 31, which is disposed on the glue delivery pipeline 2. The positioning rod 31 is used to cooperate with the workpiece to be coated to ensure that the glue gun head moves along a preset trajectory.

[0061] Specifically, the article to be coated is still taken as an example of a car door body.

[0062] During the gluing process, the positioning rod 31 is clamped on the edge of the automobile door body to be glued, and is adjusted to an appropriate guiding position to ensure that the middle position of the nozzle 1 is exactly in the middle of the weld to be glued. In this way, the sprayed sealing strip can be exactly centered on the weld, thereby effectively controlling the gluing position and improving the gluing efficiency and quality.

[0063] Furthermore, the positioning rod 31 can slide with the gun nozzle 1 during glue spraying to play an auxiliary support role, which can ensure that the gun nozzle 1 is parallel to the weld, thereby achieving uniform glue spraying and ensuring that the glue strip sprayed is uniform and smooth.

[0064] In the actual gluing operation, since the automobile door body is divided into two directions, the reversing problem of the positioning rod 31 also needs to be considered.

[0065] like Figure 1 and 5 As shown, in one embodiment, the glue gun head also includes a rotating sleeve 32, which is rotatably arranged on the glue delivery pipeline 2 and connected to the positioning rod 31. In this way, the positioning rod 31 can be reversing by rotating the rotating sleeve 32 to meet the door body requirements in different directions.

[0066] In one embodiment, if Figure 1 , 5 As shown in FIG6 , the glue gun head further includes an elastic member 4, one end of which is connected to the first end of the glue delivery pipe 2, and the other end is connected to the rotating sleeve 32. The second end of the glue delivery pipe 2 is provided with a plurality of slots 341 along the circumferential direction, and the rotating sleeve 32 is provided with a plurality of snap-in protrusions 321 that cooperate with the slots 341.

[0067] Specifically, the elastic member 4 in this embodiment is preferably a coil spring.

[0068] A first fixing ring 33 is fixedly provided at the first end of the glue delivery pipeline 2, and a second fixing ring 34 is fixedly provided at the second end of the glue delivery pipeline 2. One end of the spiral spring abuts against the first fixing ring 33, and the other end abuts against the second fixing ring 34. Further, the second fixing ring 34 is provided with a plurality of slots 341 along the circumferential direction. The provision of the first fixing ring 33 and the second fixing ring 34 makes the processing of the glue gun head component more convenient.

[0069] When the direction of the positioning rod 31 needs to be changed, the rotating sleeve 32 is first slid along the axial direction of the glue delivery pipe 2, which causes the clamping protrusion 321 to escape from the clamping groove 341, and the elastic member 4 is squeezed by the rotating sleeve 32. Then, the rotating sleeve 32 is rotated circumferentially to the target position, and the clamping protrusion 321 is waited to be aligned with the clamping groove 341. At this time, the rotating sleeve 32 is released, and the clamping protrusion 321 is re-locked into the clamping groove 341 due to the action of the elastic member 4. Such operation can adjust the position and angle of the positioning rod 31 to meet the needs of the glue coating operation.

[0070] The elastic member 4 can provide flexibility for the glue gun head and ensure the stability of the positioning rod 31 during the glue coating process. Such a design can not only improve the accuracy and efficiency of the glue coating operation, but also increase the convenience of operation.

[0071] In one embodiment, two engaging protrusions 321 are provided, and the difference between the two is 180 degrees. Correspondingly, two engaging grooves 341 are provided, and the difference between the two is 180 degrees. In this way, when the positioning rod 31 needs to change direction, it can be easily switched between the two engaging protrusions 321 and the two engaging grooves 341. This structural design is particularly conducive to the left-right switching of the positioning rod 31.

[0072] The utility model also provides a glue coating device, comprising the glue coating gun head as described in the first aspect. Since the above glue coating gun head has the above features and advantages, the glue coating device including the glue coating gun head also has the above features and advantages, which will not be described in detail herein.

[0073] In general, the sealing strip sprayed by the gluing device using this gluing gun head helps to reduce the generation of bubbles, improves the sealing and corrosion resistance of the sealing strip, and also improves the aesthetics of the coated part.

[0074] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A glue gun head, characterized in that: include: Rubber pipeline; A gun nozzle is connected to the glue delivery pipeline, and the gun nozzle includes a first side wall and a second side wall that are arranged opposite to each other, the first side wall and the second side wall define a glue outlet channel, and the first side wall is arc-shaped so that the glue strip formed by the paint from the glue delivery pipeline after flowing through the glue outlet channel has a first arc surface facing the workpiece to be coated.

2. The glue gun head according to claim 1, characterized in that: The second side wall is arc-shaped, so that the glue strip formed by the paint from the glue delivery pipeline after flowing through the glue outlet channel has a second arc surface facing the workpiece to be coated.

3. The glue gun head according to claim 2, characterized in that: The curvature of the first side wall is the same as the curvature of the second side wall.

4. The glue gun head according to claim 2, characterized in that: The second side wall is provided with a pressure relief port, and the pressure relief port is used to reduce the fluid pressure of the coating when the coating flows through the glue outlet channel.

5. The glue gun head according to claim 1, characterized in that: The width of the orthographic projection of the gun nozzle on the surface of the workpiece to be coated is 8 to 12 mm.

6. The glue gun head according to claim 1, characterized in that: The glue delivery pipeline comprises a reducing pipe section, the discharge end of the reducing pipe section is connected with the feed end of the gun nozzle, and the cross-sectional area of ​​the reducing pipe section gradually decreases along the output direction of the coating.

7. The glue gun head according to any one of claims 1 to 6, characterized in that: The glue gun head also includes: A positioning rod, wherein the positioning rod is arranged on the glue delivery pipeline, and the positioning rod cooperates with the workpiece to be coated so that the gun nozzle moves along a preset trajectory.

8. The glue gun head according to claim 7, characterized in that: The glue gun head also includes: A rotating sleeve is rotatably arranged on the rubber conveying pipeline, and the positioning rod is connected to the rotating sleeve.

9. The glue gun head according to claim 8, characterized in that: The glue gun head also includes: An elastic member, one end of which is connected to the first end of the rubber delivery pipeline, and the other end of which is connected to the rotating sleeve; The second end of the rubber delivery pipe is provided with a plurality of slots along the circumferential direction, the rotating sleeve is provided with a plurality of clamping protrusions cooperating with the slots, and the clamping protrusions are clamped in the slots under the elastic force of the elastic member.

10. A glue coating device, characterized in that: The invention comprises a glue coating gun tip as claimed in any one of claims 1 to 9.

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