A tail-coat spray gun device

Abstract

The utility model discloses a tail coating spray gun device. The tail coating spray gun device includes main shaft motor, sealant spray gun and rotator, the main shaft of main shaft motor is the hollow main shaft of front and back two ends through, the rear end of rotator is connected with the front end of hollow main shaft, and the hollow main shaft rotates and drives rotator synchronous rotation, and the inner chamber of rotator is communicated with the inner chamber of hollow main shaft, and the radial of rotator front end side wall is equipped with glue outlet, and sealant spray gun includes spray gun body and gun barrel, and the front end of gun barrel is connected in spray gun body, and the front end of gun barrel is connected with tail coating gun head, and the front end of tail coating gun head is equipped with gun head glue outlet, and the inner chamber of gun barrel is inserted into the inner chamber of hollow main shaft from back to front, and the front end of tail coating gun head is inserted into the inner chamber of rotator, and gun head glue outlet is communicated with glue outlet. The utility model can more stably realize the rotation of rotator, so as to obtain better, more stable glue spraying effect.

Description

Technical Field

[0001] This utility model relates to the field of tail coating spraying technology, and in particular to a tail coating spray gun device. Background Technology

[0002] The tail of an aluminum pharmaceutical tube is an important component of the tube packaging, and it is typically sealed using a folding method. To enhance the seal, a sealant is applied to the tail before folding and sealing, filling any tiny gaps in the seal and blocking any leakage pathways.

[0003] The tail end of the aluminum pharmaceutical tube needs to be coated with sealant to prevent ointment leakage, but uniformity and precise dosage control are required. Too little sealant will cause the seal to fail, while too much sealant will contaminate the ointment.

[0004] In existing technology, before folding and sealing the tail of an aluminum pharmaceutical tube, a spraying device is typically used to spray sealant onto the radial inner wall of the tail. In the existing sealant tail coating process (i.e., the process of applying sealant to the inner wall of the tube tail), the spraying device generally includes a sealant spray gun, a drive wheel A1, a driven wheel A2, a spraying rotor, and a motor A4 that drives the drive wheel A1. The drive wheel A1 is connected to the driven wheel A2 via a belt A3 (e.g., ...). Figure 1 (As shown); the rear end of the spraying rotating body is fixed to the center of the side of the driven wheel A2; the interior of the spraying rotating body is hollow, and a through hole is provided at the center point of the driven wheel. The inner cavity of the spraying rotating body is connected to the through hole, and a spraying hole is provided radially on the outer wall of the front end of the spraying rotating body. The spraying hole is connected to the inner cavity of the spraying rotating body; during operation, the nozzle of the sealant spray gun is inserted into the inner cavity of the spraying rotating body from back to front, and the front end of the nozzle extends to the vicinity of the spraying hole. The nozzle does not contact the inner wall of the spraying rotating body, and the nozzle outlet is connected to the spraying hole.

[0005] During the sealant tail coating operation, the front end of the spraying rotor is placed at the center of the inner cavity of the aluminum pharmaceutical tubing. When motor A4 starts and drives the drive wheel A1 to rotate, the drive wheel A1 will drive the driven wheel A2 to rotate through belt A3. After the driven wheel A2 rotates, it will drive the spraying rotor to rotate synchronously. When the sealant spray gun sprays out the sealant, the sealant will enter the front end of the inner cavity of the spraying rotor (i.e., the inner orifice of the spraying hole) through the nozzle of the gun head. As the spraying rotor rotates with the driven wheel A2, under the action of centrifugal force, the sealant will be thrown out of the spraying rotor through the spraying hole and finally sprayed onto the circumferential inner wall of the aluminum pharmaceutical tubing tail.

[0006] While existing spraying equipment designs (including the sealant spray gun, drive wheel, driven wheel, spraying rotor, and motor) can achieve basic adhesive application, the rotation of the spraying rotor is driven by the drive wheel, driven wheel, and belt. Belt drives inherently cannot guarantee the absolute parallelism of the drive and driven wheels (due to installation errors or component misalignment after long-term operation), easily resulting in "eccentric transmission." This causes a slight radial runout (vibration) on the central axis of the spraying rotor when the driven wheel drives it to rotate, further deviating the coaxiality between the spraying rotor and the hose tail. The position of the spray nozzle shifts with the vibration, preventing the adhesive from accurately covering the target area. Furthermore, the faster the rotation speed, the more pronounced this eccentric vibration becomes.

[0007] Therefore, the transmission structure used in existing spraying devices (a combination of a drive wheel, a driven wheel, and a belt) suffers from difficulties in controlling spraying accuracy and poor spraying effect. Furthermore, existing technologies rely on an electric motor to drive a belt-driven spraying unit to rotate and apply adhesive, but the current rotation speed is only 6000 rpm, resulting in poor spraying effect and severely impacting production efficiency. Utility Model Content

[0008] The purpose of this invention is to provide a tail-coating spray gun device that solves the technical problem in existing technologies where the use of belts and drive-driven pulley transmission structures makes it difficult to control spraying accuracy and effect. This invention has a simple structure and is easy to operate.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A tail coating spray gun device includes a main shaft motor, a sealant spray gun, and a rotating body; the main shaft of the main shaft motor is a hollow main shaft with both ends connected, the rear end of the rotating body is fastened to the front end of the hollow main shaft, and the rotating body rotates synchronously after the hollow main shaft rotates; the inner cavity of the rotating body is connected to the inner cavity of the hollow main shaft, and the front side wall of the rotating body is provided with a spray nozzle radially.

[0011] The sealant spray gun includes a spray gun body and a gun barrel, with the gun barrel connected to the front end of the spray gun body; a tail coating nozzle is connected to the front end of the gun barrel, and the front end of the tail coating nozzle is provided with a nozzle outlet; the gun barrel is inserted into the inner cavity of the hollow main shaft from back to front, the front end of the tail coating nozzle is inserted into the inner cavity of the rotating body, and the nozzle outlet is connected to the sealant outlet.

[0012] Furthermore, the rotating body comprises two sections, a front section being a sleeved adhesive section and a rear section being a main shaft connecting section connected to the hollow main shaft;

[0013] The front end of the hollow spindle cavity is provided with a rotating body connecting groove, and the spindle connecting section is interference-fitted with the rotating body connecting groove.

[0014] Furthermore, a shoulder structure is formed between the sleeve-out section and the main shaft connecting section, and the front outer wall surface of the main shaft connecting section is the shoulder surface;

[0015] The outer wall of the front end of the hollow spindle is also radially threaded with a clamping nut; the clamping nut is a cap nut; the cap nut consists of a nut body and a cap, the nut body has a threaded hole in the center, and the cap has a central through hole in the center position;

[0016] The sleeve-type adhesive section passes through the central through hole, and the inner wall of the cap abuts against the shoulder surface.

[0017] Furthermore, the front sidewall of the rotating body is provided with two symmetrically distributed glue spray outlets.

[0018] Furthermore, the sealant spray gun also includes a nozzle.

[0019] Furthermore, the outer wall of the gun barrel is also connected to a gun barrel mounting seat for limiting the position; the gun barrel mounting seat is located between the rear side of the main shaft motor and the front side of the spray gun body.

[0020] Compared with the prior art, the present invention provides a tail coating spray gun device, which has the following beneficial effects:

[0021] 1. In this utility model, the transmission mechanism consisting of a belt, a drive wheel, and a driven wheel is no longer added between the spindle motor and the rotating body. Instead, the rotating body is directly and fastened to the spindle of the spindle motor. After the hollow spindle rotates, the rotating body can rotate synchronously and at the same speed as the hollow spindle, thereby achieving the purpose of rapid and stable rotation of the rotating body. The stable rotation of the rotating body will be more conducive to the sealant being sprayed out evenly and quickly, thereby improving the spraying accuracy and spraying effect.

[0022] 2. Secondly, in this embodiment, a hollow main shaft structure with a through-hole is adopted. The gun barrel is inserted into the inner cavity of the hollow main shaft from back to front, and the front end of the tail coating gun head is inserted into the inner cavity of the rotating body. The glue outlet of the gun head is connected to the glue spray outlet. Compared with existing spraying devices, the above-mentioned installation and connection structure requires relatively less installation space.

[0023] 3. Finally, this embodiment also includes a clamping nut, which is a cap-shaped nut. The cap-shaped nut consists of a nut body and a cap. The nut body has a threaded hole in its center, and the cap has a central through hole in its center. The sleeve-type extension section passes through the central through hole. When the nut body is threadedly connected to the outer wall of the front end of the hollow spindle, as the cap-shaped nut is tightened, the inner wall of the cap of the cap-shaped nut can apply a thrust to the side wall of the spindle connecting section, thereby allowing the spindle connecting section to be better pushed into the rotating body connecting groove from front to back, thus better achieving the interference fit between the spindle connecting section and the inner wall of the rotating body connecting groove. Attached Figure Description

[0024] Figure 1 This is a diagram showing the connection structure of the driving pulley, driven pulley, belt, and motor in existing technology.

[0025] Figure 2 This is a cross-sectional view of the tail coating spray gun device in this utility model.

[0026] Figure 3 This is a cross-sectional view of the tail coating gun head in this utility model.

[0027] Figure 4 This is a cross-sectional view of the gun barrel in this utility model.

[0028] Figure 5 This is a cross-sectional view of the rotating body in this utility model.

[0029] In the picture:

[0030] A1 - Driven pulley, A2 - Driven pulley, A3 - Belt, A4 - Motor, A5 - Motor shaft;

[0031] 1-Main spindle motor, 2-Spray gun body, 3-Gun barrel, 4-Tail coating gun head, 5-Gun needle, 6-Rotating body, 7-Clamping nut, 8-Gun barrel fixing seat;

[0032] 11 - Hollow spindle front end; 12 - Hollow spindle inner cavity;

[0033] 41- Glue outlet at the nozzle;

[0034] 61-Glue outlet section, 62-Main spindle connection section, 63-Glue spray outlet one, 64-Glue spray outlet two, 65-Rotating internal cavity, 66-Shoulder surface;

[0035] 71 - Center through hole. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] like Figure 2-5 As shown, this utility model provides a tail coating spray gun device, which includes a main shaft motor 1, a sealant spray gun, and a rotating body 6.

[0038] In this embodiment, the spindle motor 1 has a hollow spindle that extends through both ends. The maximum speed of this hollow spindle can reach 24,000 rpm. Figure 2As shown, the inner cavity of the hollow spindle is the spindle inner cavity 12, which is connected at both ends. The rear end of the rotating body 6 is fastened to the front end 11 of the hollow spindle. After the hollow spindle rotates, it drives the rotating body 6 to rotate synchronously.

[0039] like Figure 2 and Figure 5 As shown, in this embodiment, the rotating body 6 has a hollow interior with an open rear end, and is composed of two integrally connected sections; the front section of the rotating body is a sleeved adhesive section 61, as shown... Figure 5 As shown, the sleeve-type adhesive dispensing section 61 is generally long and tubular, and the outer wall of the front end of the sleeve-type adhesive dispensing section 61 has a spray nozzle radially (i.e., radially on the front side wall of the rotating body). The rear section of the rotating body is the main shaft connecting section 62, which is used to connect with the hollow main shaft. The main shaft connecting section 62 is wider at the front and narrower at the rear. The rear end of the sleeve-type adhesive dispensing section 61 is connected to the center of the front end of the main shaft connecting section 62, and the sleeve-type adhesive dispensing section 61 and the main shaft connecting section 62 form a shoulder structure. The front outer wall surface of the main shaft connecting section 62 is the shoulder surface 66. Specifically, the shoulder surface 66 is perpendicular to the horizontal outer wall surface of the sleeve-type adhesive dispensing section 61.

[0040] Preferably, there is at least one adhesive spray outlet. In this embodiment, two symmetrically distributed adhesive spray outlets, namely adhesive spray outlet one 63 and adhesive spray outlet two 64, are radially arranged on the front sidewall of the rotating body. Both adhesive spray outlet one 63 and adhesive spray outlet two 64 are connected to the inner cavity of the rotating body 6. At the same time, the inner cavity of the rotating body 6 (i.e., the inner cavity 65 of the rotating body) is connected to the inner cavity of the hollow main shaft (i.e., the inner cavity 12 of the hollow main shaft).

[0041] In this embodiment, a sealant spray gun with a needle is selected. The core principle of this sealant spray gun is "power-driven needle opening and closing of the adhesive channel + pressure pushing the adhesive material out of the nozzle." Through the cooperation of mechanical or pneumatic / electric structures, precise control and stable coating of the adhesive material are achieved. The sealant spray gun includes components such as a spray gun body 2 and a gun barrel 3. The gun barrel 3 is connected to the front end of the spray gun body 2; the front end of the gun barrel 3 is fastened to a tail coating nozzle 4 (see...). Figure 3 The tail coating gun head 4 has a glue outlet 41 at its front end; the gun barrel 3 is inserted into the hollow main shaft cavity 12 from back to front, and the tail coating gun head 4 is inserted into the rotating body cavity 65, with the glue outlet 41 connected to the glue spray outlets (glue spray outlet one 63 and glue spray outlet two 64). Specifically, as shown... Figure 2 As shown, the outer orifice of the glue outlet 41 of the gun head is located between glue outlet 1 63 and glue outlet 2 64.

[0042] like Figure 2 As shown, the front end of the needle 5 extends along the inner cavity of the barrel 3 to the inner orifice of the nozzle 41. The needle is the core control component of the sealant spray gun with a needle, and its main function is to precisely control the dispensing and discontinuation of the sealant, directly determining the spraying accuracy and sealing performance.

[0043] Under normal conditions, the gun needle 5 blocks the glue outlet 41 of the gun head, thus "cutting off the glue supply". When the spray gun switch is triggered (such as by pressing the trigger), the power mechanism pushes the gun needle 5 backward, the glue outlet 41 of the gun head is opened, and the sealant is sprayed out smoothly, thus "dispensing glue".

[0044] As can be seen from the above connection structure, in this embodiment, a transmission mechanism consisting of a belt, a drive wheel, and a driven wheel is no longer added between the spindle motor 1 and the rotating body 6. Instead, the rotating body 6 is directly connected to the hollow spindle of the spindle motor 1. After the hollow spindle rotates, the rotating body 6 can rotate synchronously with the hollow spindle, thereby achieving the purpose of rapid and stable rotation of the rotating body 6. The stable rotation of the rotating body 6 will be more conducive to the sealant being sprayed out evenly and quickly, thereby improving the spraying accuracy and spraying effect.

[0045] During the tail coating operation, the front part of the rotating body 6 extends into the center of the inner cavity of the aluminum pharmaceutical tubing. When the main shaft motor 1 starts, the hollow main shaft drives the rotating body 6 to rotate synchronously. At the same time, the needle 5 moves backward to open the nozzle outlet 41. After the outlet channel is opened, the sealant flows through the nozzle outlet 41 to the spray outlet. Because the rotating body 6 rotates circumferentially, it can evenly coat the inner wall of the tail of the object to be coated with sealant 360 degrees. After the coating is completed, the needle 5 moves forward to re-block the nozzle outlet 41, temporarily closing the outlet channel. During the above operation, if... Figure 2 As shown, neither the barrel 3 nor the breech-coated nozzle 4 has any contact with the hollow main shaft and the rotating body 6 on its outer wall. In other words, after the hollow main shaft rotates, the barrel 3 and the breech-coated nozzle 4 are unaffected and will not rotate or shift in position due to collision.

[0046] Preferably, in this embodiment, the front end of the hollow spindle cavity 12 is provided with a rotating body connecting groove, and the spindle connecting section 62 is interference-fitted with the rotating body connecting groove. Figure 2 As shown, in this embodiment, the rotating body connecting groove is the front part of the hollow spindle inner cavity 12 (near the front port of the hollow spindle), and the whole has a frustum structure that is wider at the front and narrower at the back. The rear half of the rotating body 6 (i.e., the spindle connecting section 62) is fitted into the rotating body connecting groove, and the rotating body connecting groove and the spindle connecting section 62 are interference-fitted to achieve a tight connection. Under this tight connection method, the hollow spindle rotates and drives the rotating body 6 to rotate synchronously.

[0047] Preferably, to achieve a better tightening effect, a clamping nut 7 is also added. For example... Figure 2 As shown, the clamping nut 7 is a cap-shaped nut, which consists of an integrally connected nut body and a cap. The nut body has a threaded hole in its center, and the cap has a central through hole 71 (the clamping nut 7 is similar in appearance to a threaded bottle cap, but with a through hole in the center of the cap top). Figure 2 and Figure 5 As shown, the cap of the cap nut is located on the front side of the shoulder surface 66. The threaded hole is used to mate with the outer wall of the front end 11 of the hollow spindle for fastening.

[0048] The cap-shaped nut body is radially threaded to the outer wall of the front end 11 of the hollow main shaft. Simultaneously, the sleeve-type rubber section 61 penetrates the central through hole 71. Figure 2 As shown. During the assembly process, when the cap nut is threaded to the outer wall of the front end 11 of the hollow spindle, as the cap nut is tightened, the inner wall of the cap of the cap nut presses against the shoulder surface 66 and applies a thrust to the spindle connecting section 62, thereby allowing the spindle connecting section 62 to be better pushed into the rotating body connecting groove from front to back, thus better achieving the interference fit between the spindle connecting section 62 and the inner wall of the rotating body connecting groove.

[0049] Similarly, after installation, the inner wall of the cap nut of the cap-shaped nut is tightly pressed against the shoulder surface 66, which can lock the tight connection between the rotating body 6 and the hollow spindle, preventing the spindle connecting section 62 from loosening and falling out of the inner cavity of the rotating body connecting groove. This ensures that the connection strength between the rotating body 6 and the hollow spindle can remain as constant as possible under long-term rotation operation.

[0050] Preferably, such as Figure 2 As shown, in this embodiment, a barrel mounting seat 8 for limiting positioning is also connected to the outer wall of the barrel 3; the barrel mounting seat 8 is located between the rear side of the main shaft motor 1 and the front side of the spray gun body 2. Specifically, the barrel mounting seat 8 can be fixed on the mounting platform, and a mounting through hole is opened in the barrel mounting seat 8 with both ends passing through it. The barrel 3 passes through the mounting through hole and can be interference-fitted with the mounting through hole, thereby limiting the deviation of the barrel 3's axial direction.

[0051] Furthermore, because the hollow main shaft is directly and tightly connected to the rotating body 6, the connection structure between the hollow main shaft and the rotating body 6 is relatively stable during rotation, and the rotating body 6 is not prone to vibration or displacement. The higher the rotational speed of the hollow main shaft, the faster the rotating body 6 rotates synchronously, and the stronger the centrifugal or shear force on the sealant, making it easier to break it into fine particles. These particles are also more likely to form a uniform coating on the inner wall of the tailpipe during spraying or dispersion.

Claims

1. A tail-coating spray gun device, characterized in that: It includes a spindle motor (1), a sealant spray gun, and a rotating body (6); the spindle of the spindle motor (1) is a hollow spindle with both ends connected, and the rear end of the rotating body (6) is fastened to the front end (11) of the hollow spindle. After the hollow spindle rotates, it drives the rotating body (6) to rotate synchronously; the inner cavity (65) of the rotating body is connected to the inner cavity (12) of the hollow spindle, and the front side wall of the rotating body (6) is provided with a spray nozzle in the radial direction; The sealant spray gun includes a spray gun body (2) and a gun barrel (3). The gun barrel (3) is connected to the front end of the spray gun body (2). The front end of the gun barrel (3) is connected to a tail coating gun head (4). The front end of the tail coating gun head (4) is provided with a gun head glue outlet (41). The gun barrel (3) is inserted into the hollow spindle cavity (12) from back to front. The front end of the tail coating gun head (4) is inserted into the rotating body cavity (65). The gun head glue outlet (41) is connected to the spray gun outlet.

2. The tail coating spray gun device according to claim 1, characterized in that: The rotating body (6) includes two sections, the front section being a sleeved adhesive section (61) and the rear section being a main shaft connecting section (62) connected to the hollow main shaft. The front end of the hollow spindle cavity (12) is provided with a rotating body connecting groove, and the spindle connecting section (62) is interference-fitted with the rotating body connecting groove.

3. The tail coating spray gun device according to claim 2, characterized in that: A shoulder structure is formed between the sleeve-out section (61) and the main shaft connecting section (62), and the front outer wall surface of the main shaft connecting section (62) is the shoulder surface (66). The outer wall of the front end (11) of the hollow spindle is also radially threaded with a clamping nut (7); the clamping nut (7) is a cap nut; the cap nut consists of a nut body and a cap, the nut body has a threaded hole in the center, and the cap has a central through hole (71) in the center position. The sleeve-out section (61) passes through the central through hole (71), and the inner wall of the cap abuts against the shoulder surface (66).

4. A tail coating spray gun device according to any one of claims 1-3, characterized in that: The front sidewall of the rotating body (6) is provided with two symmetrically distributed glue spray outlets.

5. The tail coating spray gun device according to claim 4, characterized in that: The sealant spray gun also includes a needle (5).

6. The tail coating spray gun device according to claim 5, characterized in that: The outer wall of the barrel (3) is also connected to a barrel mounting seat (8) for limiting the position; the barrel mounting seat (8) is located between the rear side of the main shaft motor (1) and the front side of the spray gun body (2).

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