Double-seal dispensing gun device

Abstract

The utility model discloses a double-seal glue dispensing gun device which comprises a guide piece, a glue guide moving pipe is connected in the guide piece in a sliding mode, the tail end of the glue guide moving pipe is communicated with a glue inlet pipeline, and the front end of the glue guide moving pipe is communicated with a glue dispensing assembly. An air guide block for pushing the glue guide moving pipe to slide in the guide piece is arranged on the outer side of the guide piece; and a double-sealing rubber core assembly is arranged in the dispensing assembly. The glue dispensing device has the beneficial effects that the gas guide block pushes the glue guide moving pipe to slide in the guide piece, so that the glue dispensing assembly makes contact with the surface of a workpiece to be subjected to glue dispensing, continuous glue coating is conducted through the double-sealing glue core assembly, linear or point-shaped glue coating can be achieved, excessive or insufficient glue coating is avoided, and the glue coating uniformity is greatly improved; meanwhile, when the dispensing assembly is far away from the surface of the workpiece to be dispensed, sealing can be achieved through the double-sealing rubber core assembly, and the situation of glue leakage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of dispensing, in particular to a double-sealing dispensing gun device. BACKGROUND

[0002] Dispensing technology uses dispensing equipment (dispensing gun) and dispensing heads to accurately extrude barrel-shaped glue raw materials, which is commonly used for reinforcement or insulation. The application of dispensing technology in the cigarette industry mainly reflects in cigarette packaging, production equipment maintenance, and anti-fake identification. In cigarette packaging, dispensing can accurately apply glue to ensure the tightness of the cigarette box and improve production efficiency. In equipment maintenance, dispensing technology is used to lubricate and seal mechanical parts, reducing wear and tear and prolonging the service life of the equipment. In addition, dispensing is also used to attach anti-fake identification to enhance the security and credibility of the product. Overall, dispensing technology plays an important role in improving product quality and production efficiency.

[0003] The utility model discloses a kind of dispensing heads of leakage-proof glue, including inlet, glue pipe, outlet, inlet is connected with dispensing gun, glue pipe includes the glue pipe front section containing inlet, glue pipe middle section and the glue pipe last section with outlet, glue pipe front section, glue pipe middle section and glue pipe last section are sequentially arranged from left to right, inner thread is provided in the inner side wall of glue pipe front section, the inner diameter of glue pipe last section gradually increases from the end adjacent to outlet to the end away from outlet, characterized in that, fixed pin is arranged in the inside of glue pipe, one end of tension spring is connected with fixed pin, the end of tension spring away from fixed pin is connected with glue head stopper, glue head stopper is arranged on outlet, and glue head stopper can cover outlet, the inner diameter of glue head stopper gradually increases from the end adjacent to tension spring to the end away from tension spring;The above-mentioned patent in the use process, when the glue water of paste or liquid is guided, the sealing plug is pushed out by the pressure of glue water and dispensing gun, to realize the guidance of colloid, but when solenoid valve is closed, the pressure in the glue pipe does not disappear suddenly, and the glue water is still in the state of guidance, until the pressure in the glue pipe is weakened to the state that tension spring overcomes the pressure of glue water and makes sealing plug reset, i.e. the above-mentioned patent still exists the seepage of glue water from outlet when ending dispensing work, and when glue water is applied, the sealing plug blocks the position of outlet, and it is difficult to guarantee the uniform application of glue water.

[0004] Therefore, it is a problem worth studying to provide a double-sealing dispensing gun device. UTILITY MODEL CONTENTS

[0005] In order to solve the above-mentioned problems in the prior art, the purpose of the utility model is to make the glue application more uniform and prevent the glue from leaking after the glue application is completed.

[0006] The purpose of this utility model is achieved as follows:

[0007] This utility model provides a double-sealed dispensing gun device, including a guide member, a dispensing guide tube slidably connected inside the guide member, the end of the dispensing guide tube being connected to the glue inlet pipe, the front end of the dispensing guide tube being connected to the dispensing assembly, the dispensing assembly having a double-sealed glue core assembly inside, and an air guide block being provided on the outside of the guide member to push the dispensing guide tube to slide inside the guide member.

[0008] In some embodiments, the guide includes a guide cylinder, the adhesive guiding moving tube slides within the guide cylinder, the outer surface of the adhesive guiding moving tube is provided with a convex ring, the inside of the guide cylinder is provided with a sliding hole, the convex ring and the sliding hole are slidably sealed together, the air guiding block is an air guiding chamber, which is connected to the sliding hole through a gas channel, and a solenoid valve is provided at the air port at the outer end of the air guiding block.

[0009] In some embodiments, a return spring is provided inside the sliding hole, and the return spring and the gas channel are respectively located on both sides of the convex ring.

[0010] In some embodiments, the outer wall of the convex ring is slidably sealed to the inner wall of the sliding hole by a sealing rubber ring.

[0011] In some embodiments, the dispensing assembly includes a dispensing head, a valve body, and an adhesive delivery rod connected in sequence. The end of the adhesive delivery rod is connected to the adhesive guiding moving tube. The dispensing head has an adhesive outlet at its front end. The dual-seal adhesive core assembly includes a sealing roller ball. The sealing roller ball is disposed inside the dispensing head by a front sealing spring, and the sealing roller ball corresponds to the adhesive outlet.

[0012] The valve body is provided with a glue storage hole, and a sealing valve core is slidably connected in the glue storage hole. The front end of the sealing valve core passes through the front sealing spring and is in contact with the sealing roller ball. The valve body is provided with a rear sealing spring that supports the rear end of the sealing valve core. The sealing valve core is provided with a glue feeding hole at one end facing the sealing roller ball, and the side wall of the sealing valve core is provided with a valve core component that communicates with the glue feeding hole. The diameter of the sealing roller ball is larger than the diameter of the glue outlet hole and the glue feeding hole.

[0013] In some embodiments, the glue storage hole is a stepped hole, with the smaller diameter end of the stepped hole facing the dispensing assembly. The rear end of the sealing valve core is provided with a baffle plate, the diameter of which is larger than the smaller diameter of the stepped hole of the glue storage hole. A rear sealing ring is provided on the outer side of the sealing valve core, and the rear sealing ring contacts and seals with the inner end of the glue storage hole.

[0014] In some embodiments, the inner wall of the dispensing head is conical, the front sealing spring is conical, and the small end faces the sealing roller ball.

[0015] In some embodiments, the front end surface of the sealing valve core is concave-convex arranged towards the sealing roller ball.

[0016] In some embodiments, the glue dispensing head, the valve body, the glue delivery rod, and the glue guide moving pipe are connected by threads.

[0017] Positive benefits:

[0018] By pushing the glue guide moving pipe to slide in the guide through the air guide block, the glue can be accurately coated. When the glue dispensing assembly contacts the surface of the workpiece to be dispensed, the double-sealing glue core assembly can continuously coat the glue, so that linear or point-shaped glue coating can be achieved. This precise control can ensure the uniformity of the glue coating, avoid excessive or insufficient glue coating, and greatly improve the uniformity of the glue coating.

[0019] Meanwhile, when the glue dispensing assembly is away from the surface of the workpiece to be dispensed, the double-sealing glue core assembly can realize sealing, avoiding the leakage of glue. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a mounting structure schematic diagram of the guide and the glue guide moving pipe in the utility model;

[0022] Figure 3 It is an internal structure schematic diagram of the glue dispensing assembly in the utility model;

[0023] Figure 4 It is an internal structure schematic diagram of the utility model when it is away from the glue dispensing position;

[0024] Figure 5 It is an internal structure schematic diagram of the utility model Figure 4 when the glue dispensing position is away from the glue dispensing position;

[0025] Figure 6 It is an internal structure schematic diagram of the utility model when the glue dispensing position is away from the glue dispensing position;

[0026] In the figure, it is: glue dispensing assembly 1, glue dispensing head 101, glue outlet hole 101a, valve body 104, glue storage hole 104a, glue delivery rod 108, guide 2, guide cylinder body 201, sliding hole 201a, return spring 202, magnet 203, magnetic switch 204, air guide block 3, electromagnetic valve 301, glue guide moving pipe 4, convex ring 401, double-sealing glue core assembly 5, sealing roller ball 501, front end sealing spring 502, rear end sealing ring 503, sealing valve core 504, glue feeding hole 504a, valve core 504b, baffle 504c, rear end sealing spring 505, wrench groove 6; DETAILED DESCRIPTION

[0027] The utility model is further explained in connection with the drawings and examples.

[0028] First embodiment:

[0029] Referring to Figures 1-6 As shown in the figure, the utility model provides a double sealing point glue gun device, including guide piece 2, guide piece 2 inside slidingly connected with glue guide moving pipe 4, glue guide moving pipe 4 end and glue inlet pipeline intercommunication, glue guide moving pipe 4 front end and point glue assembly 1 intercommunication, guide piece 2 outside is equipped with the air guide block 3 of driving glue guide moving pipe 4 inside guide piece 2 sliding;Point glue assembly 1 is equipped with double sealing glue core assembly 5 in.

[0030] When the device is used, the guide piece 2 is fixed, the point glue assembly 1 is towards the workpiece to be glued, when the workpiece to be glued corresponds to the point glue assembly 1, the air guide block 3 drives the glue guide moving pipe 4 to slide towards the workpiece, when the point glue assembly 1 at the front end of the glue guide moving pipe 4 contacts the workpiece to be glued, the double sealing glue core assembly 5 is used to assist the glue to guide out, and the glue is applied to the surface of the workpiece to be glued, so that the glue application work of the workpiece to be glued is realized. When the glue guide moving pipe 4 is continuously in the forward state, the point glue assembly 1 can continuously contact the surface of the workpiece to be glued by the double sealing glue core assembly 5, and linear glue application is realized. When the glue guide moving pipe 4 corresponds to the surface of the workpiece, the air guide block 3 is in the moving state of forward and backward, the double sealing glue core assembly 5 can continuously contact the surface of the workpiece to be glued by the point glue assembly 1, and the point glue application of the workpiece is realized. When the workpiece is away from the point glue assembly 1, the double sealing operation of the glue outlet at the front end of the point glue assembly 1 is realized by the double sealing glue core assembly 5, and the glue leakage is avoided. Preferably, the guide piece 2 can be fixed in a longitudinal installation mode, that is, the axis of the glue guide moving pipe 4 extends longitudinally.

[0031] In summary, the glue guide moving pipe 4 can accurately control the position of the point glue assembly 1 by sliding inside the guide piece 2, the point glue assembly 1 can be more easily adjusted to contact the position of the workpiece to be glued by sliding the glue guide moving pipe 4 by the air guide block 3, and the double sealing glue core assembly 5 ensures that the glue is guided out and applied to the surface of the workpiece, so that the point glue can be applied at the specified position.

[0032] When the glue guide moving pipe 4 remains in the forward state, the point glue assembly 1 can continuously contact the surface of the workpiece by the double sealing glue core assembly 5, and uniform linear glue application is realized. When the glue guide moving pipe 4 corresponds to the surface of the workpiece, the point glue assembly 1 can be adjusted to the mode of point glue application, and different glue application requirements are met.

[0033] The double-sealing glue core assembly 5 can ensure accurate glue discharge, reduce the possibility of glue leakage or uneven glue coating, and improve the precision and consistency of the glue dispensing process, which is particularly important for high-precision industrial manufacturing, especially in situations where high glue coating requirements are required.

[0034] The entire structure is relatively compact, and the cooperation between the various components enables the device to be applied to glue dispensing work on workpieces of different shapes and sizes, and the device can adjust the glue coating method as needed, such as linear or point-like glue coating, thereby improving the application range and flexibility.

[0035] The second embodiment differs from the first embodiment in that:

[0036] Referring to Figure 1 , Figure 2 , the guide 2 includes a guide cylinder 201, and the guide cylinder 201 is provided with a passage that is open in front and back, which is used to assist the sliding of the glue moving pipe 4. The outer circular surface of the glue moving pipe 4 is provided with a convex ring 401, and the guide cylinder 201 is provided with a sliding hole 201a, and the inner wall diameter of the sliding hole 201a is greater than the inner wall diameter of the passage. The convex ring 401 is in sliding sealing cooperation with the sliding hole 201a, and the convex ring 401 can slide inside the sliding hole 201a. The guide block 3 is a gas guide chamber, which is in communication with the sliding hole 201a through a gas passage. The convex ring 401 is located on one side of the gas passage, and the guide block 3 is provided with an electromagnetic valve 301 at the gas port of the outer end. A gas pump or gas source can be connected to the end of the electromagnetic valve 301, and the electromagnetic valve 301 can be used for exhaust or inflation operation. Referring to Figure 4 , Figure 6 , when the electromagnetic valve 301 fills the gas into the guide block 3, the gas in the guide block 3 is guided into the guide cylinder 201 through the gas passage, and the gas pressure on one side of the convex ring 401 rises, which can push the convex ring 401 to slide inside the guide cylinder 201, thereby adjusting the forward and backward movement position of the glue moving pipe 4. Similarly, when the electromagnetic valve 301 is used for exhaust operation, the convex ring 401 drives the glue moving pipe 4 to move in the opposite direction. Preferably, the sliding hole 201a is provided with a reset spring 202, and the reset spring 202 and the gas passage are located on the two sides of the convex ring 401, respectively. When the electromagnetic valve 301 is used for exhaust, the elasticity of the reset spring 202 can assist the glue moving pipe 4 to move quickly.

[0037] In the preferred embodiment, the sliding hole 201a extends through to the rear end face of the guide cylinder 201, and the sliding hole 201a is provided with an end cover through which the glue moving pipe 4 passes. The end cover is in sliding sealing cooperation with the outer circular side wall of the rear part of the glue moving pipe 4. Referring to Figure 4 , Figure 6As shown, the convex ring 401 and the outer wall of the glue guiding moving pipe 4 are both provided with sealing rubber rings, the sealing rubber ring on the outer wall of the convex ring 401 is located at the rear part of the convex ring 401 and is in sliding sealing cooperation with the end cover at the opening of the sliding hole 201a, and the outer wall of the convex ring 401 is in sliding sealing cooperation with the inner wall of the sliding hole 201a through the sealing rubber ring, so that the smooth sliding between the convex ring 401 and the sliding hole 201a and between the glue guiding moving pipe 4 and the end cover can be ensured, and meanwhile the sealing effect is guaranteed, and the gas leakage is avoided.

[0038] In addition, the glue guiding moving pipe 4 is sleeved with a magnet 203 on the outside, the magnet 203 faces the return spring 202, and the magnet 203 is installed close to the convex ring 401, and the outer side of the guiding cylinder 201 is provided with a magnetic switch 204 for controlling the magnet 203.

[0039] The third embodiment is different from the first embodiment in that:

[0040] Referring to Figure 3 , Figure 4 , Figure 5 As shown, the glue dispensing assembly 1 comprises a valve body 104, the front end and the rear end of the valve body 104 are connected with a glue dispensing head 101 and a glue conveying rod 108 respectively, the end of the glue conveying rod 108 is communicated with the glue guiding moving pipe 4, the front end of the glue dispensing head 101 is provided with a glue outlet hole 101a, the double sealing rubber core assembly 5 comprises a sealing roller ball 501, the glue dispensing head 101 is connected with the sealing roller ball 501 corresponding to the glue outlet hole 101a through a front end sealing spring 502, the diameter of the sealing roller ball 501 is greater than the diameter of the glue outlet hole 101a, the elastic support of the sealing roller ball 501 is formed by the elasticity of the front end sealing spring 502, and since the inner diameter of the sealing roller ball 501 is greater than the diameter of the glue outlet hole 101a, the front end part of the sealing roller ball 501 can be pushed out of the glue outlet hole 101a under the pushing of the front end sealing spring 502, and the large end of the sealing roller ball 501 is still left inside the glue dispensing assembly 1;

[0041] The valve body 104 is provided with a glue storage hole 104a, which is a stepped hole with a small diameter end facing the glue dispensing assembly 1. A sealing valve core 504 is slidably connected in the glue storage hole 104a. The front end of the sealing valve core 504 penetrates the front end sealing spring 502 and is in contact with the sealing roller ball 501. The valve body 104 is provided with a rear end sealing spring 505 supporting the rear end of the sealing valve core 504. The sealing valve core 504 is provided with a glue feeding hole 504a at one end facing the sealing roller ball 501. The side wall of the sealing valve core 504 is provided with a valve core part 504b communicating with the glue feeding hole 504a. The rear end of the sealing valve core 504 is provided with a baffle 504c with a diameter larger than the small diameter of the stepped hole of the glue storage hole 104a. The outer side of the sealing valve core 504 is provided with a rear end sealing ring 503 in contact with the inner end of the glue storage hole 104a. In the normal state, the elasticity of the front end sealing spring 502 is used to elastically support the sealing roller ball 501 to form a sealing operation on the glue outlet hole 101a. The elasticity of the rear end sealing spring 505 can push the baffle 504c to slide towards the stepped hole, so that the front end of the sealing valve core 504 is in contact with the sealing roller ball 501. At this time, the baffle 504c corresponds to the step of the stepped hole to realize two-stage sealing. In this structure, the contact between the sealing roller ball 501 and the glue outlet hole 101a constitutes a primary sealing of the glue, and the contact between the baffle 504c and the stepped hole constitutes a secondary sealing of the glue, so as to constitute a double sealing structure for the glue conduction. When the device is not in use, the glue conduction can be avoided.

[0042] When the glue is needed, the glue conduction moving tube 4 slides in the guide 2 to push the glue conveying rod 108 to elongate. The glue conveying rod 108, the valve body 104 and the glue dispensing head 101 all slide until the sealing roller ball 501 at the front end of the glue dispensing head 101 gradually contacts the position to be glued. The sealing roller ball 501 slides towards the inner end of the glue outlet hole 101a against the elasticity of the front end sealing spring 502. At this time, the sealing roller ball 501 can also push the sealing valve core 504 to move towards the inner side of the glue storage hole 104a against the elasticity of the rear end sealing spring 505. The valve core part 504b extends into the large end of the stepped hole. At this time, the glue can enter the inside of the valve core part 504b and be guided out of the outside of the sealing roller ball 501 through the glue feeding hole 504a. With the movement of the workpiece to be glued, the sealing roller ball 501 rolls in the inside of the glue outlet hole 101a. The rolling sealing roller ball 501 can smear the glue outside the sealing roller ball 501 to the outside of the workpiece to complete the glue dispensing and glue smearing operation.

[0043] After the workpiece completes the dispensing work, the workpiece is separated from the sealing roller ball 501, the sealing valve core 504 is pushed by the rear sealing spring 505, the valve core part 504b enters the small diameter hole inside of the stepped hole, the baffle 504c contacts the stepped position, sealing is realized, the sealing roller ball 501 is contacted with the glue outlet hole 101a by the front sealing spring 502, double sealing is realized, the reliability of the double sealing dispensing gun is greatly increased, and the quality risk is reduced; in addition, the head of the sealing roller ball 501 needs to be lightly wiped with a wet cloth during a short shutdown; after shutdown, the head of the sealing roller ball 501 also needs to be lightly wiped with a wet cloth, and vaseline or grease can be applied to the head after wiping.

[0044] Further, the inner wall of the dispensing head 101 is a conical surface, the front end sealing spring 502 is a cone, and the small end faces the sealing roller ball 501. When the dispensing head 101 and the valve body 104 are installed, the front end of the valve body 104 is provided with a threaded section, and the inner wall of the dispensing head 101 is provided with a threaded hole. The valve body 104 and the dispensing head 101 are screwed together to connect the dispensing head 101 and the valve body 104. The front surface of the valve body 104 is annular. When the front end sealing spring 502 is a cone, one end of the front end sealing spring 502 is a small end, and the other end is a large end. The large end faces the rear of the front end sealing spring 502. The rear end of the front end sealing spring 502 can be supported and limited by the front surface of the valve body 104. The small end of the front end sealing spring 502 abuts against the outside of the sealing roller ball 501. When the front end sealing spring 502 is a cone, the sealing valve core 504 is not interfered during installation, which is beneficial to the installation of the sealing valve core 504.

[0045] In the preferred embodiment, the front end surface of the sealing valve core 504 facing the sealing roller ball 501 is concave-convex. Specifically, a plurality of groove structures can be formed on the front end surface of the sealing valve core 504. The grooves can be "V" shaped or "U" shaped. At this time, the gap between the glue in the sealing valve core 504 and the sealing roller ball 501 is increased, the grooves assist the discharge of the glue, and the glue can quickly wrap the outside of the sealing roller ball 501,

[0046] In the structure of the dispensing assembly 1, the dispensing head 101 is connected with the valve body 104 by screwing, the valve body 104 is connected with the glue conveying rod 108 by screwing, and the glue conveying rod 108 is connected with the glue guiding moving pipe 4 by screwing. In the screwing structure of the dispensing head 101 and the valve body 104, the surface of the dispensing head 101 facing the valve body 104 is provided with an internal thread hole, and the surface of the valve body 104 facing the dispensing head 101 is provided with an external thread ring. The screwing connection of the valve body 104 and the dispensing head 101 is realized by screwing. In the specific installation, the sealing roller ball 501 and the front end sealing spring 502 are sequentially placed in the dispensing head 101, so that the sealing roller ball 501 corresponds to the glue outlet hole 101a. After the valve body 104 is screwed into the dispensing head 101, the front end of the valve body 104 can limit the large end of the front end sealing spring 502. Further, the front end surface of the valve body 104 is a conical surface, and the large end of the conical surface is away from the dispensing head 101. After the valve body 104 enters the dispensing head 101, an annular groove is formed between the conical surface and the inner wall of the dispensing head 101, which can better limit the front end sealing spring 502. In addition, in the screwing structure of the valve body 104 and the glue conveying rod 108, the surface of the valve body 104 facing the glue conveying rod 108 is provided with an internal thread hole, and the surface of the glue conveying rod 108 facing the valve body 104 is provided with an external thread ring. The screwing connection of the valve body 104 and the glue conveying rod 108 is realized by screwing. In the specific connection, the rear end sealing ring 503 is passed through the front end of the sealing valve core 504, so that the rear end sealing ring 503 contacts the large end of the sealing valve core 504. The sealing valve core 504 is inserted into the stepped hole in the valve body 104. The rear end sealing spring 505 is placed at the rear end of the sealing valve core 504. The screwing connection of the glue conveying rod 108 and the valve body 104 realizes the connection of the glue conveying rod 108 and the valve body 104. The front end surface of the glue conveying rod 108 forms a support and fixation for the rear end sealing spring 505. After the installation is completed, the rear end sealing spring 505 forms an elastic compression for the sealing valve core 504. In the screwing structure of the glue conveying rod 108 and the glue guiding moving pipe 4, the surface of the glue conveying rod 108 facing the glue guiding moving pipe 4 is provided with an internal thread hole, and the surface of the glue guiding moving pipe 4 facing the glue conveying rod 108 is provided with an external thread ring. The screwing connection of the glue conveying rod 108 and the glue guiding moving pipe 4 is realized by screwing. The glue conveying rod 108 mainly plays a role in guiding the glue. In the assembly, part of the dispensing assembly 1 can be assembled first, then the guide 2, the air guiding block 3, the glue guiding moving pipe 4 and other components can be assembled, and finally the dispensing assembly 1 and the glue guiding moving pipe 4 are connected, which improves the installation convenience of the device.

[0047] Further, the outer walls of the dispensing head 101, the valve body 104, the glue conveying rod 108 and the glue guiding moving pipe 4 are provided with wrench grooves 6, so that the wrench can be clamped on the wrench grooves 6 to rotate the components during screwing connection, which is more convenient to operate.

Claims

1. A double-seal dispensing gun device, comprising a guide (2), characterized in that: The guide (2) is slidably connected to the glue guiding moving tube (4), the end of the glue guiding moving tube (4) is connected to the glue inlet pipe, the front end of the glue guiding moving tube (4) is connected to the glue dispensing assembly (1), and the glue dispensing assembly (1) is provided with a double sealing glue core assembly (5). The guide (2) is provided with an air guide block (3) on the outside of which pushes the guide tube (4) to slide inside the guide (2).

2. The double-seal dispensing gun device according to claim 1, characterized in that: The guide component (2) includes a guide cylinder (201), the adhesive guiding moving tube (4) slides inside the guide cylinder (201), the outer surface of the adhesive guiding moving tube (4) is provided with a convex ring (401), the inside of the guide cylinder (201) is provided with a sliding hole (201a), the convex ring (401) and the sliding hole (201a) are slidably sealed together, the air guide block (3) is an air guide chamber, which is connected to the sliding hole (201a) through a gas channel, and a solenoid valve (301) is provided at the air port at the outer end of the air guide block (3).

3. The double-seal dispensing gun device according to claim 2, characterized in that: A return spring (202) is provided inside the sliding hole (201a), and the return spring (202) and the gas channel are located on both sides of the convex ring (401).

4. The double-seal dispensing gun device according to claim 3, characterized in that: The outer wall of the convex ring (401) is slidably sealed to the inner wall of the sliding hole (201a) by a sealing rubber ring.

5. A double-seal dispensing gun device according to any one of claims 1-4, characterized in that: The dispensing assembly (1) includes a dispensing head (101), a valve body (104), and an adhesive delivery rod (108) connected in sequence. The end of the adhesive delivery rod (108) is connected to the adhesive guiding moving tube (4). The dispensing head (101) has an adhesive outlet hole (101a) at its front end. The double-sealed adhesive core assembly (5) includes a sealing roller ball (501). The sealing roller ball (501) is set inside the dispensing head (101) by a front sealing spring (502), and the sealing roller ball (501) corresponds to the adhesive outlet hole (101a). The valve body (104) is provided with a glue storage hole (104a). A sealing valve core (504) is slidably connected in the glue storage hole (104a). The front end of the sealing valve core (504) passes through the front sealing spring (502) and is in contact with the sealing roller ball (501). The valve body (104) is provided with a rear sealing spring (505) that supports the rear end of the sealing valve core (504). The sealing valve core (504) is provided with a glue feeding hole (504a) at one end facing the sealing roller ball (501). The side wall of the sealing valve core (504) is provided with a valve core component (504b) that communicates with the glue feeding hole (504a). The diameter of the sealing roller ball (501) is larger than the diameter of the glue outlet hole (101a) and the glue feeding hole (504a).

6. The double-seal dispensing gun device according to claim 5, characterized in that: The glue storage hole (104a) is a stepped hole, with the small diameter end of the stepped hole facing the dispensing assembly (1). The rear end of the sealing valve core (504) is provided with a baffle (504c), the diameter of which is larger than the small diameter of the stepped hole of the glue storage hole (104a). The outer side of the sealing valve core (504) is provided with a rear sealing ring (503), which contacts and seals the inner end of the glue storage hole (104a).

7. The double-seal dispensing gun device according to claim 6, characterized in that: The inner wall of the dispensing head (101) is conical, and the front sealing spring (502) is conical with its small end facing the sealing roller ball (501).

8. The double-seal dispensing gun device according to claim 6, characterized in that: The front surface of the sealing valve core (504) is concave and convex towards the sealing roller ball (501).

9. A double-seal dispensing gun device according to claim 5, characterized in that: The dispensing head (101) is threadedly connected to the valve body (104), the valve body (104) is threadedly connected to the glue delivery rod (108), and the glue delivery rod (108) is threadedly connected to the glue guiding moving tube (4).

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