Spray type glue dispensing gun and rebound type glue dispensing gun

Abstract

The utility model discloses a spray type glue dispensing gun and a rebound type glue dispensing gun, and relates to the technical field of plastic dripping. According to the spray type glue dispensing gun disclosed by the utility model, gas and liquid raw materials are simultaneously injected into the jet flow shell A, and when the spray type glue dispensing gun is used, the piston rod A circularly pushes the raw materials in the inner cavity of the jet flow shell A to be sprayed out in an atomized form under the action of the gas, so that a larger area can be covered by each time of spraying, and the plastic dripping efficiency is higher when large-area plastic dripping operation is carried out; according to the rebound type glue dispensing gun disclosed by the utility model, the piston rod C is far away from the sealing ring through pushing of raw materials, so that the inner cavity of the second shell B is communicated with the inner cavity of the first shell B, and the output of the raw materials is realized; and the piston rod C automatically rebounds and abuts against the sealing ring through the elastic effect, so that the inner cavity of the second shell B and the inner cavity of the first shell B are disconnected, automatic closing is achieved, the piston rod C does not need to be pushed by an air source to move, and more cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of drop plastic, specifically relates to a spray type point gum gun and rebound type point gum gun. BACKGROUND

[0002] Drop plastic is a product that most of the processes still use manual production at present. Its main raw material is to dissolve PVC paste resin in DOP fat, add color paste, become different color paste resin mixture. Drop the different color paste resin mixture into the aluminum mold, brass mold, electroforming or silica gel mold, through heating to 170 or more, PVC paste resin and DOP fat class occur chemical reaction, and become solid, become the product with rich color and strong three-dimensional sense.

[0003] The drop plastic machine is connected with different point gum guns to output different color liquid materials, and then sprays the materials to the mold through the point gum gun to realize drop plastic molding.

[0004] The existing point gum gun can only carry out centralized spray drop plastic, but for the product that needs large area drop plastic, the existing centralized point gum gun is low in efficiency and long in glue spraying work time. Meanwhile, the existing spray type point gum gun generally needs an air inlet hole, and the piston rod is moved to extrude the raw material through the air inlet hole during extrusion operation, so that the air source cost is high. UTILITY MODEL CONTENTS

[0005] In order to solve the technical problems of low efficiency and long glue spraying work time of the existing centralized point gum gun, the utility model provides a spray type point gum gun, and in order to solve the problem of high air source cost of the existing point gum gun, the utility model provides a rebound type point gum gun.

[0006] The utility model adopts the technical scheme that:

[0007] The spray type point gum gun comprises a second shell A, a piston rod A and a spray shell A, the spray shell A is installed at one end of the second shell A, the piston rod A is movably installed in the second shell A, and the piston head of the piston rod A is located in the cavity of the spray shell A, the second shell A is symmetrically provided with a glue injection hole A and a first air inlet hole, and the glue injection hole A and the first air inlet hole are communicated with the inner cavity of the spray shell A through a first connecting hole and a second connecting hole respectively.

[0008] As an option, one end of the second shell A is further provided with a flow converging nozzle, and the flow converging nozzle is located in the inner cavity of the spray shell A, the piston head of the piston rod A is located in the flow converging nozzle, and the piston rod A, the flow converging nozzle and the spray shell A are coaxially arranged.

[0009] As optional, the other end of the second shell A is provided with a third shell and a fourth shell A connected in sequence; the third shell is provided with a second air inlet; the fourth shell A is provided with a movable cavity A, the movable cavity A is provided with a spring A and a sliding block A, one end of the piston rod A away from the piston head is connected with one end of the sliding block A, and the other end of the sliding block A abuts against the spring A.

[0010] As optional, the other end of the fourth shell A away from the third shell is further provided with a fifth shell A, and the fifth shell A is provided with a third air inlet.

[0011] As optional, the jet shell A is provided with a flow guide pipe.

[0012] As optional, the other end of the second shell A away from the jet shell A is connected with a fourth shell B; the fourth shell B is provided with a movable cavity B, the movable cavity B is provided with a limiting block and a sliding block B at two ends respectively, and the limiting block and the sliding block B are provided with a spring B; the other end of the fourth shell B away from the second shell A is connected with a fifth shell B, the fifth shell B is provided with a movable cavity C, the movable cavity C is movably provided with a sliding block C, the sliding block C is connected with one end of the piston rod A away from the piston head; and the other end of the fifth shell B away from the fourth shell B is provided with a connecting head.

[0013] The rebound type glue dispensing gun comprises a second shell B, a first shell B and a piston rod C, the piston rod C is elastically installed in the second shell B, the first shell B is connected with the second shell B, and the piston head of the piston rod C is located in the cavity of the first shell B; the second shell B is provided with a glue injection hole B, and the glue injection hole B is communicated with the inner cavity of the second shell B; the inner cavity of the first shell B is provided with a sealing ring, and the piston head of the piston rod C abuts against the sealing ring under the elastic action; when raw materials are injected into the glue injection hole B, the piston head of the piston rod C is away from the sealing ring, so that the inner cavities of the first shell B and the second shell B are communicated with each other.

[0014] The utility model discloses a beneficial effect is:

[0015] The utility model provides a spray type glue dispensing gun, through setting up first connecting hole and second connecting hole respectively at the symmetrical both sides of second shell A, make glue injection hole A and first air inlet respectively through with first connecting hole and second connecting hole with jet shell A inner chamber intercommunication, make gas and liquid raw material inject to jet shell A simultaneously, in use, through the raw material of piston rod A circulation push jet shell A inner chamber under the action of gas to atomize form and spray, thereby can cover greater area every time and spray, when carrying out large -area drop plastic operation, drop plastic efficiency is higher.

[0016] The utility model also provides a rebound type point gum gun, through in the piston rod C elasticity is arranged in the second casing B, the first casing B inner chamber is provided with the sealing ring, when the raw material is input to the second casing B from the glue injection hole B, under the raw material's push, make the piston rod C far from the sealing ring, to make the second casing B inner chamber and the inner chamber of first casing B intercommunication, to realize the output of raw material, after the plastic drop ends, stop inputting raw material to the glue injection hole B, under the elasticity effect, the piston rod C automatically rebounds and abuts the sealing ring, make the second casing B inner chamber and the inner chamber of first casing B break off, to realize automatic closing, the utility model directly through raw material to push the piston rod C movement, to realize raw material output and break off, need not gas source to push the piston rod C movement, save the cost more. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structure schematic diagram of spray type point gum gun.

[0018] Figure 2 It is Figure 1 The sectional view schematic drawing of A-A in it.

[0019] Figure 3 It is the structure schematic diagram of flow guide pipe.

[0020] Figure 4 It is the sectional view schematic drawing of flow guide pipe setting up first V type groove.

[0021] Figure 5 It is the side view schematic drawing of flow guide pipe setting up first V type groove.

[0022] Figure 6 It is the structure schematic diagram of spray flow shell A.

[0023] Figure 7 It is the structure schematic diagram of first casing A.

[0024] Figure 8 It is the structure schematic diagram of second casing A.

[0025] Figure 9 It is the structure schematic diagram of third casing.

[0026] Figure 10 It is the structure schematic diagram of slider A.

[0027] Figure 11 It is the structure schematic diagram of fourth casing A.

[0028] Figure 12 It is the structure schematic diagram of fifth casing A.

[0029] Figure 13 It is the structure schematic diagram of the second embodiment of spray type point gum gun.

[0030] Figure 14 is a structural schematic diagram of embodiment five of the spray type dispensing gun.

[0031] Figure 15 is a structural schematic diagram of embodiment three of the spray type dispensing gun.

[0032] Figure 16 is a structural schematic diagram of embodiment four of the spray type dispensing gun.

[0033] Figure 17 is a structural schematic diagram of the spray type dispensing gun in embodiment four, which is provided with a second V-shaped groove.

[0034] Figure 18 is a structural schematic diagram of the spray shell B.

[0035] Figure 19 is a side view schematic diagram of the spray shell B.

[0036] Figure 20 is a structural schematic diagram of the rebound type dispensing gun.

[0037] Figure 21 is a structural schematic diagram of the first shell B.

[0038] In the figure: 100-first shell A, 110-first shell B, 200-second shell A, 2011-first connecting hole, 2012-second connecting hole, 201-glue injection hole A, 202-first air inlet hole, 203-polyflow nozzle, 204-nozzle movable cavity, 300-third shell, 301-second air inlet hole, 302-center hole, 400-fourth shell A, 401-movable cavity A, 402-sliding block A, 403-spring A, 410-fourth shell B, 411-movable cavity B, 412-limiting block, 413-spring B, 414-sliding block B, 500-fifth shell A, 501-third air inlet hole, 510-fifth shell B, 511-movable cavity C, 512-sliding block C, 513-connection head, 5131-fourth air inlet hole, 600-spray shell A, 610-spray shell B, 611-third connecting hole, 612-second V-shaped groove, 613-convex table, 700-flow guide pipe, 701-first V-shaped groove, 800-piston rod A, 810-piston rod B, 820-piston rod C. DETAILED DESCRIPTION

[0039] The specific scheme of the utility model is further described below in combination with the drawings.

[0040] A spray type dispensing gun:

[0041] Embodiment one:

[0042] As Figures 1 to 12As shown, the spray dispensing gun comprises a second housing A200, a piston rod A800 and a spray shell A600; the spray shell A600 is mounted at one end of the second housing A200, the piston rod A800 is movably mounted in the second housing A200, and a converging nozzle 203 is mounted at one end of the second housing A200 and located in the inner cavity of the spray shell A600; the other end of the second housing A200 is provided with a third housing 300 and a fourth housing A400 connected in sequence; the third housing 300 is provided with a second air inlet hole 301; the fourth housing A400 is provided with a movable cavity A401, the movable cavity A401 is provided with a spring A403 and a sliding block A402, one end of the piston rod A800 away from the piston head abuts against the other end of the sliding block A402 and the spring A403. The other end of the fourth housing A400 away from the third housing 300 is further provided with a fifth housing A500, and the fifth housing A500 is provided with a third air inlet hole 501. The piston head of the piston rod A800 is located in the converging nozzle 203, the piston rod A800 passes through the second housing A200 and the third housing 300 in sequence and is connected to one end of the sliding block A402 located in the movable cavity A401; the second housing A200 is provided with a glue injection hole A201 and a first air inlet hole 202 symmetrically, and the glue injection hole A201 and the first air inlet hole 202 are communicated with the inner cavity of the spray shell A600 through a first connecting hole 2011 and a second connecting hole 2021 respectively. The spray shell A600 is provided with a flow guide pipe 700.

[0043] In use, the glue injection hole A201 is connected with a raw material pipeline, the first air inlet hole 202 and the second air inlet hole 301 are respectively connected with a compressed air (i.e. air source) pipeline; by arranging the first connecting hole 2011 and the second connecting hole 2012 on the two symmetrical sides of the second housing A200, the glue injection hole A201 and the first air inlet hole 202 are communicated with the inner cavity of the spray shell A600 through the first connecting hole 2011 and the second connecting hole 2012, so that the compressed air and the liquid raw material are injected into the spray shell A600 at the same time; at the same time, the pressure in the second air inlet hole 301 passes through the central hole 302 of the third housing 300 into the movable cavity A, and pushes the sliding block A402 away from the third housing 300, so that the end of the piston rod A800 away from the converging nozzle 203, so that the outside air and the raw material can enter the converging nozzle 203, then stop inputting compressed air into the second air inlet hole 301, the spring A403 pushes the sliding block A402 close to the third housing 300, so that the piston rod A800 cyclically pushes the raw material in the converging nozzle 203 and the inner cavity of the spray shell A600 to be sprayed in the form of atomization under the action of gas, so that each time of spraying can cover a larger area, and the drop molding efficiency is higher when performing large-area drop molding.

[0044] In the embodiment, the third air inlet hole 501 is also connected with a compressed air pipeline, and input of compressed air into the third air inlet hole 501 can assist the spring A403 to push the slider A402 to move, thereby increasing the speed of the piston rod A800 to push the raw material to spray out.

[0045] In the embodiment, the piston head of the piston rod A800 and the inner cavity of the converging nozzle 203 are conical and matched, the outer shell of the converging nozzle 203 and the inner cavity of the jet shell A600 are conical and matched, the converging nozzle 203 is provided with a jet outlet at one end close to the jet shell A600, and the piston rod A800 pushes air in the inner cavity of the converging nozzle 203, so that a jet is formed at the converging nozzle 203, and the gas and the raw material in the jet shell A600 are sprayed out; at the same time, the converging nozzle 203 is slidably installed in the nozzle movable cavity 204 (as shown in Figure 6 After the piston rod A800 abuts against the converging nozzle 203, with continuous movement of the piston rod A800, the piston rod A800 pushes the converging nozzle 203 to move in the nozzle movable cavity 204, so that the converging nozzle 203 pushes the raw material and the gas in the inner cavity of the jet shell A600 into the flow guide pipe 700; a sealing sheet is arranged between the outer side wall of the converging nozzle 203 and the inner side wall of the nozzle movable cavity 204, after the converging nozzle 203 abuts against the inner side wall of the jet shell A600, the second air inlet hole 301 is connected with compressed air to make the piston rod A800 move away from the converging nozzle 203, at the same time, with continuous input of the compressed air and the raw material into the jet shell A600 through the first air inlet hole 202 and the glue injection hole A201, the pressure of the compressed air and the raw material pushes the converging nozzle 203 to return to the initial position of the nozzle movable cavity 204, so that the jet shell A600 is in communication with the inner cavity of the flow guide pipe 700 again, and the cycle is repeated.

[0046] In the embodiment, the flow guide pipe 700 is threadedly connected with the inner cavity of the jet shell A600, and the flow guide pipe 700 is used to adjust the length of the spray.

[0047] In other embodiments, as shown in Figure 4 and Figure 5 the outlet end of the flow guide pipe 700 is provided with a first V-shaped groove 701, the inlet end groove width of the first V-shaped groove 701 is smaller than the inner diameter of the flow guide pipe 700, and the outlet end groove width of the first V-shaped groove 701 is larger than the inlet end groove width, so that the gas-liquid mixture is instantaneously pressurized after entering the first V-shaped groove 701, and with the increase of the groove width, the gas-liquid mixture is depressurized, thereby generating a pressure drop, forming a spray effect similar to a shower head, to enhance the effect of the spray.

[0048] In the embodiment, as shown in Figure 2 and Figure 5As shown, the jet shell A600 is tightly covered on the second shell A200 through the first shell A cover, and the first shell A100 and the second shell A200 are screwed together through the threaded connection.

[0049] Embodiment two:

[0050] As shown, the difference between the present embodiment and embodiment one is that the jet shell B610 is used to replace the jet shell A600 in the present embodiment, and no flow guide pipe is installed on the jet shell B610. Figure 13 In the present embodiment, the inner cavity of the jet shell B610 has a tapered section close to one end of the converging nozzle 203, which is fitted with the converging nozzle 203, and a horn-shaped nozzle is arranged at the end of the jet shell B610 away from the converging nozzle 203, and the horn-shaped nozzle and the tapered section are connected through an equal-diameter section.

[0051] The beneficial effect of the present embodiment is that the converging nozzle 203 can directly push the compressed air and the raw material to be atomized and sprayed out of the horn-shaped nozzle, and when the installation height is fixed, the area of the atomized plastic drops of the horn-shaped nozzle is larger.

[0052] Embodiment three:

[0053] As shown, the difference between the present embodiment and embodiment one is that:

[0054] Figure 15 In the present embodiment, the second shell A200 is directly connected with the fourth shell B410, and the end of the fourth shell B410 away from the second shell A200 is connected with the fifth shell B500.

[0055] The fourth shell B410 is provided with a movable cavity B411, and the two ends of the movable cavity B411 are respectively provided with a limiting block 414 and a sliding block C412, and a spring B413 is arranged between the limiting block 414 and the sliding block B412.

[0056] The limiting block 414 is fixedly arranged at the end of the movable cavity B411 away from the second shell A200, and the sliding block C412 is sleeved on the piston rod B810; the fifth shell B500 is provided with a movable cavity C511, and the movable cavity C511 is provided with a sliding block C512 which can slide, and the piston rod B810 passes through the limiting block 414 and is connected with the sliding block C512.

[0057] The limiting block 414 is fixedly arranged at the end of the movable cavity B411 away from the second shell A200, and the sliding block C412 is sleeved on the piston rod B810; the fifth shell B500 is provided with a movable cavity C511, and the movable cavity C511 is provided with a sliding block C512 which can slide, and the piston rod B810 passes through the limiting block 414 and is connected with the sliding block C512.

[0058] The end of the second shell A200 away from the jet shell A600 is connected with the fourth shell B410;

[0059] The fourth shell B410 is provided with a movable cavity B411, and the two ends of the movable cavity B411 are respectively provided with a limiting block 414 and a sliding block C412, and a spring B413 is arranged between the limiting block 414 and the sliding block C412.

[0060] ​The fifth shell B510 is connected to one end of the fourth shell B410 away from the second shell A200, and the fifth shell B510 is provided with a movable cavity C511. A sliding block C512 is movably installed in the movable cavity C511, and the sliding block C512 is connected to one end of the piston rod A800 away from the piston head. A connecting head 513 is arranged at one end of the movable cavity C511 away from the fourth shell B410, and a fourth air inlet hole 5131 is formed in the connecting head 513 and connected to the compressed air pipeline.

[0061] In this embodiment, the compressed air is input into the movable cavity C511 from the fourth air inlet hole 5131, so as to push the sliding block C512 to move, and further push the piston rod B810 to move. At the same time, the raw material and the compressed air are simultaneously input into the glue injection hole A211 and the first air inlet hole 212 of the second shell A200 respectively. After the compressed air and the raw material enter the inside of the jet shell A600, the piston rod B810 pushes the converging nozzle 203 to move, so that the converging nozzle 203 extrudes the raw material and the compressed air. In the extrusion process, the raw material is blown by the compressed air to be in an atomized state and sprayed out. After the compressed air pipeline is disconnected, the pressure in the movable cavity C511 disappears, and the spring B413 pushes the sliding block B412 to return to the initial position. The reset mode of the converging nozzle 203 is referred to the first embodiment.

[0062] Embodiment four:

[0063] As shown in Figure 16 , the combination mode of the jet shell A600 and the flow guide pipe 700 in this embodiment can be replaced by a jet shell B610.

[0064] In other embodiments, the outlet end of the jet shell B610 can be replaced by a second V-shaped groove 612 instead of a horn-shaped nozzle (as shown in Figures 17 to 19 ). The end surface of the jet shell B610 is provided with bosses 613, and the distance between the two bosses 613 gradually increases, thereby forming the second V-shaped groove 612. The effect of the second V-shaped groove 612 is the same as that of the first V-shaped groove 711, and details are not repeated here.

[0065] Embodiment five:

[0066] As shown in Figure 14 , a third connecting hole 611 is formed in the jet shell B610 in this embodiment, and the third connecting hole 611 communicates the first connecting hole 2011 with the horn-shaped nozzle of the jet shell B610. The second connecting hole 2012 still communicates with the inner cavity of the jet shell B610.

[0067] The difference between the above-mentioned embodiments of this embodiment is that after the gas-liquid mixture in the inner cavity of the jet shell B610 enters the horn-shaped nozzle, the airflow blown out of the third connecting hole 611 can guide and further atomize the gas-liquid mixture.

[0068] A rebound type glue gun, embodiment one:

[0069] As shown in Figure 20 and Figure 21 , the rebound type glue gun comprises a second shell B210, a first shell B110 and a piston rod C820; the piston rod C820 is elastically mounted in the second shell B210, the first shell B110 is connected with the second shell B210, and the piston head of the piston rod C820 is located in the cavity of the first shell B110; the second shell B210 is provided with a glue injection hole B211, and the glue injection hole B211 is in communication with the inner cavity of the second shell B210; the inner cavity of the first shell B110 is provided with a sealing ring 212, and the piston head of the piston rod C820 is elastically abutted against the sealing ring 212; when raw materials are injected into the glue injection hole B211, the piston head of the piston rod C820 is away from the sealing ring 212, so that the inner cavities of the first shell B110 and the second shell B210 are in communication.

[0070] By elastically arranging the piston rod C820 in the second shell B210, the inner cavity of the first shell B110 is provided with a sealing ring 212; when the raw materials are input from the glue injection hole B211 into the second shell B210, the piston rod C820 is away from the sealing ring 212 under the pushing of the raw materials, so that the inner cavities of the second shell B210 and the first shell B110 are in communication, thereby realizing the output of the raw materials; after the plastic dripping is finished, the input of the raw materials into the glue injection hole B211 is stopped, and under the elastic action, the piston rod C820 automatically rebounds and abuts against the sealing ring 212, so that the inner cavities of the second shell B210 and the first shell B110 are disconnected, thereby realizing automatic closing; the utility model directly pushes the piston rod C820 to move by the raw materials, thereby realizing the output and disconnection of the raw materials, and the piston rod C820 does not need to be pushed to move by the gas source, and the gas source cost is saved.

[0071] The driving mode of the piston rod C820 can refer to the driving mode of the piston rod A800 or the piston rod B810; in the embodiment, the second shell B210 is further connected with a fourth shell A and a fifth shell A510 in sequence at the end away from the first shell B110, and the structures of the fourth shell A410 and the fifth shell A510 refer to the embodiment three of the spray type glue gun.

[0072] In the utility model, unless another definite provision and limitation, the term " install " " link " " connect " " fixed " and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through intermediate medium indirectly connect, can be two element inside's intercommunication or two element's interaction relationship.For the ordinary skill in the art, can understand the concrete meaning of the above-mentioned term in the utility model according to specific circumstances.

[0073] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Furthermore, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0074] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the ordinary skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A spray dispensing gun characterized by: The second shell A (200), the piston rod A (800) and the jet shell A (600) are included. The jet shell A (600) is mounted at one end of the second shell A (200), the piston rod A (800) is movably mounted in the second shell A (200), and the piston head of the piston rod A (800) is located in the cavity of the jet shell A (600). The second shell A (200) is symmetrically provided with a glue injection hole A (201) and a first air inlet hole (202), and the glue injection hole A (201) and the first air inlet hole (202) are communicated with the inner cavity of the jet shell A (600) through a first connecting hole (2011) and a second connecting hole (2021) respectively.

2. The spray-type dispensing gun according to claim 1, wherein The second shell A (200) is further provided with a converging nozzle (203) at one end, and the converging nozzle (203) is located in the inner cavity of the jet shell A (600). The piston head of the piston rod A (800) is located in the converging nozzle (203), and the piston rod A (800), the converging nozzle (203) and the jet shell A (600) are coaxially arranged.

3. The spray dispensing gun of claim 2, wherein, The other end of the second shell A (200) is provided with a third shell (300) and a fourth shell A (400) connected in sequence. The second shell A (200) is symmetrically provided with a glue injection hole A (201) and a first air inlet hole (202), and the glue injection hole A (201) and the first air inlet hole (202) are communicated with the inner cavity of the jet shell A (600) through a first connecting hole (2011) and a second connecting hole (2021) respectively. The fourth shell A (400) is further provided with a fifth shell A (500) at one end away from the third shell (300), and the fifth shell A (500) is provided with a third air inlet hole (501) therein.

4. The spray dispensing gun of claim 3, wherein, The jet shell A (600) is provided with a flow guide pipe (700) therein.

5. The spray dispensing gun of claim 1, wherein, The other end of the second shell A (200) away from the jet shell A (600) is connected with a fourth shell B (410); 6. The spray dispensing gun of claim 2, wherein, The fourth shell B (410) is provided with a movable cavity B (411) therein, and the movable cavity B (411) is provided with a limiting block (412) and a sliding block B (414) at two ends respectively, and a spring B (413) is arranged between the limiting block (412) and the sliding block B (414); The other end of the fourth shell B (410) away from the second shell A (200) is connected with a fifth shell B (510), and the fifth shell B (510) is provided with a movable cavity C (511) therein, and a sliding block C (512) is movably arranged in the movable cavity C (511), and the sliding block C (512) is connected with the other end of the piston rod A (800) away from the piston head. The other end of the fifth shell B (510) away from the fourth shell B (410) is provided with a connecting head (513). The second shell B (210), the first shell B (110) and the piston rod C (820) are included.

7. A rebounding dispensing gun characterized by: ​ The piston rod C (820) is elastically mounted in the second housing B (210), the first housing B (110) is connected with the second housing B (210), and the piston head of the piston rod C (820) is located in the cavity of the first housing B (110); The second housing B (210) is provided with a glue injection hole B (211), and the glue injection hole B (211) is in communication with the inner cavity of the second housing B (210); The inner cavity of the first housing B (110) is provided with a sealing ring (212), the piston head of the piston rod C (820) is elastically abutted against the sealing ring (212), when the raw materials are injected into the glue injection hole B (211), the piston head of the piston rod C (820) is away from the sealing ring (212), so that the inner cavities of the first housing B (110) and the second housing B (210) are in communication.

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