Spray type glue dispensing gun and rebound type glue dispensing gun

Abstract

The invention 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, gas and liquid raw materials are injected into the jet flow shell A at the same time, when the spray type glue dispensing gun is used, the piston rod A circularly pushes the raw materials in an inner cavity of the jet flow shell A to be sprayed out in an atomized mode under the action of the gas, so that a larger area can be covered by spraying out each time, and the plastic dripping efficiency is higher when large-area plastic dripping operation is carried out; according to the springback type glue dispensing gun, the piston rod C is far away from the sealing ring through pushing of raw materials, so that an inner cavity of the second shell B communicates with an inner cavity of the first shell B, and output of the raw materials is achieved; 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 invention belongs to the technical field of plastic drop, and in particular relates to a spray type glue dispensing gun and a rebound type glue dispensing gun. Background Art

[0002] Plastic dripping is one of the few products that are still produced by hand. Its main raw materials are PVC paste resin dissolved in DOP and other fats, and then added with color paste to form a mixture of different colors of paste resin. The different colors of the paste resin mixture are dripped onto an aluminum mold, brass mold, electroforming or silicone mold, and heated to above 170 degrees. The PVC paste resin and DOP and other fats react chemically and become solid, turning into a product with rich colors and strong three-dimensional sense.

[0003] The drop molding machine uses a number of dispensing guns to connect liquid materials of different colors to different dispensing guns for output, and then sprays the materials onto the mold through the dispensing guns to achieve drop molding.

[0004] Existing glue guns can only perform centralized jet-flow plastic dripping. However, for products that require large-area plastic dripping, the existing centralized glue guns are inefficient to use and take a long time to spray glue. At the same time, existing jet-flow glue guns generally require air inlets. During the extrusion operation, air needs to be introduced through the air inlet to push the piston rod to move and extrude the raw materials, which has a high air source cost. Summary of the invention

[0005] In order to solve the technical problems of low efficiency and long glue spraying time of existing centralized glue dispensing guns, the present invention provides a spray type glue dispensing gun; in order to solve the problem of high air source cost of existing glue dispensing guns, the present invention provides a rebound type glue dispensing gun.

[0006] The technical solution adopted by the present invention is:

[0007] A spray-type glue dispensing gun comprises a second shell body A, a piston rod A and a jet shell A; the jet shell A is mounted at one end of the second shell body A, the piston rod A is movably mounted in the second shell body A, and the piston head of the piston rod A is located in the cavity of the jet shell A; the second shell body 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 connected to the inner cavity of the jet shell A through a first connecting hole and a second connecting hole respectively.

[0008] Optionally, a focusing nozzle is also installed at one end of the second shell A, and the focusing nozzle is located in the inner cavity of the jet shell A; the piston head of the piston rod A is located in the focusing nozzle, and the piston rod A, the focusing nozzle and the jet shell A are coaxially arranged.

[0009] Optionally, 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 hole; the fourth shell A is provided with an active chamber A, the active chamber A is provided with a spring A and a slider A, the end of the piston rod A away from the piston head is connected to one end of the slider A, and the other end of the slider A is pressed against the spring A.

[0010] Optionally, a fifth shell A is installed at one end of the fourth shell A away from the third shell, and a third air inlet hole is opened in the fifth shell A.

[0011] Optionally, a flow guide pipe is provided in the jet shell A.

[0012] Optionally, the end of the second shell A away from the jet shell A is connected to the fourth shell B; a movable chamber B is provided in the fourth shell B, and a limit block and a slider B are respectively provided at both ends of the movable chamber B, and a spring B is provided between the limit block and the slider B; the end of the fourth shell B away from the second shell A is connected to the fifth shell B, and an movable chamber C is provided in the fifth shell B, and a slider C is movably installed in the movable chamber C, and the slider C is connected to the end of the piston rod A away from the piston head; a connecting head is provided at the end of the fifth shell B away from the fourth shell B.

[0013] A rebound 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 to the second shell B, and the piston head of the piston rod C is located in the cavity of the first shell B; a glue injection hole B is provided on the second shell B, and the glue injection hole B is connected to the inner cavity of the second shell B; a sealing ring is provided in the inner cavity of the first shell B, and the piston head of the piston rod C presses against the sealing ring under the action of elasticity. 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 cavity of the first shell B and the inner cavity of the second shell B are connected to each other.

[0014] The beneficial effects of the present invention are:

[0015] The present invention provides a spray-type glue dispensing gun, wherein a first connecting hole and a second connecting hole are respectively arranged on two symmetrical sides of a second shell body A, so that a glue injection hole A and a first air inlet hole are respectively connected to an inner cavity of a jet shell A through the first connecting hole and the second connecting hole, so that gas and liquid raw materials are simultaneously injected into the jet shell A. When in use, the raw materials in the inner cavity of the jet shell A are circulated and pushed by a piston rod A to be sprayed out in an atomized form under the action of gas, so that each spraying can cover a larger area, and when performing a large-area drop molding operation, the drop molding efficiency is higher.

[0016] The present invention also provides a rebound glue dispensing gun, in which a piston rod C is elastically arranged in a second shell body B, and a sealing ring is arranged in the inner cavity of the first shell body B; when the raw material is input into the second shell body B from the glue injection hole B, the piston rod C is pushed by the raw material to move away from the sealing ring, so that the inner cavity of the second shell body B is connected with the inner cavity of the first shell body B, thereby realizing the output of the raw material; after the dripping is completed, the input of the raw material into the glue injection hole B is stopped, and under the action of elasticity, the piston rod C automatically rebounds and presses against the sealing ring, so that the inner cavity of the second shell body B is disconnected from the inner cavity of the first shell body B, thereby realizing automatic closing. The present invention directly drives the piston rod C to move through the raw material, thereby realizing the output and disconnection of the raw material, and does not require an air source to drive the piston rod C to move, which saves more costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of a spray dispensing gun.

[0018] Figure 2 yes Figure 1 Schematic cross-sectional view of AA.

[0019] Figure 3 It is a schematic diagram of the structure of the guide tube.

[0020] Figure 4 It is a cross-sectional schematic diagram showing that the flow guide pipe is provided with a first V-shaped groove.

[0021] Figure 5 It is a side view schematic diagram of a flow guide pipe provided with a first V-shaped groove.

[0022] Figure 6 It is a schematic diagram of the structure of the jet shell A.

[0023] Figure 7 It is a schematic structural diagram of the first shell A.

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

[0025] Fig. 9 It is a schematic diagram of the structure of the third shell.

[0026] Fig.10 It is a structural diagram of slider A.

[0027] Fig.11 It is a schematic diagram of the structure of the fourth shell A.

[0028] Fig.12 It is a schematic diagram of the structure of the fifth shell A.

[0029] Fig.13 It is a structural schematic diagram of the second embodiment of the spray type dispensing gun.

[0030] Fig.14It is a structural schematic diagram of a fifth embodiment of a spray type glue dispensing gun.

[0031] Fig.15 It is a structural schematic diagram of the third embodiment of the spray type dispensing gun.

[0032] Fig.16 It is a structural schematic diagram of a fourth embodiment of a spray type glue dispensing gun.

[0033] Fig.17 It is a structural schematic diagram of the spray dispensing gun provided with a second V-shaped groove in the fourth embodiment.

[0034] Fig.18 It is a schematic diagram of the structure of the jet shell B.

[0035] Fig.19 It is a side view schematic diagram of the jet shell B.

[0036] Fig. 20 It is a structural schematic diagram of a rebound type dispensing gun.

[0037] Fig.21 It is a schematic diagram of the structure 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-flow converging nozzle, 204-nozzle active cavity, 300-third shell, 301-second air inlet hole, 302-center hole, 400-fourth shell A, 401-active cavity A, 402-slider A, 403-spring A, 410-fourth shell B, 411-active cavity B, 412 -limit block, 413-spring B, 414-slider B, 500-fifth shell A, 501-third air inlet, 510-fifth shell B, 511-active chamber C, 512-slider C, 513-connecting head, 5131-fourth air inlet, 600-jet shell A, 610-jet shell B, 611-third connecting hole, 612-second V-groove, 613-boss, 700-guide tube, 701-first V-groove, 800-piston rod A, 810-piston rod B, 820-piston rod C. DETAILED DESCRIPTION

[0039] The specific scheme of the present invention is further described below in conjunction with the accompanying drawings.

[0040] A spray dispensing gun:

[0041] Embodiment 1:

[0042] like Figures 1 to 12As shown, the spray dispensing gun includes a second housing A200, a piston rod A800 and a jet housing A600; the jet housing A600 is installed at one end of the second housing A200, the piston rod A800 is movably installed in the second housing A200, and a focusing nozzle 203 is also installed at one end of the second housing A200, and the focusing nozzle 203 is located in the inner cavity of the jet housing 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 301; the fourth housing A400 is provided with an active cavity A401, and the active cavity A401 is provided with a spring A403 and a slider A402, the piston rod A800 is away from the piston head, and the other end of the slider A402 is pressed against the spring A403. The end of the fourth housing A400 away from the third housing 300 is also provided with a fifth housing A500, and the fifth housing A500 is provided with a third air inlet 501. The piston head of the piston rod A800 is located in the focusing nozzle 203. The piston rod A800 passes through the second shell A200 and the third shell 300 in sequence, and is connected to one end of the slider A402 located in the active cavity A401. The second shell A200 is symmetrically provided with a glue injection hole A201 and a first air inlet hole 202. The glue injection hole A201 and the first air inlet hole 202 are connected to the inner cavity of the jet shell A600 through the first connecting hole 2011 and the second connecting hole 2021 respectively. A guide pipe 700 is provided in the jet shell A600.

[0043] When in use, the injection hole A201 is connected to the raw material pipeline, and the first air inlet hole 202 and the second air inlet hole 301 are respectively connected to the compressed air (i.e., air source) pipeline; by arranging the first connecting hole 2011 and the second connecting hole 2012 on the symmetrical sides of the second shell A200, the injection hole A201 and the first air inlet hole 202 are respectively connected to the inner cavity of the jet 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 jet shell A600 at the same time; at the same time, the pressure in the second air inlet hole 301 is released through the central hole 301 of the third shell 300. 2 enters into the active cavity A, and pushes the slider A402 away from the third shell 300, so that the piston rod A800 is away from the end of the focusing nozzle 203, so that the outside air and raw materials can enter the focusing nozzle 203, and then, the compressed air is stopped from being input into the second air inlet 301, and the spring A403 pushes the slider A402 close to the third shell 300, so that the piston rod A800 cyclically pushes the focusing nozzle 203 and the raw materials in the inner cavity of the jet shell A600 to be sprayed out in the form of atomization under the action of the gas, so that each spray can cover a larger area, and the spraying efficiency is higher when performing large-area drop molding operations.

[0044] In this embodiment, the third air inlet 501 is also connected to a compressed air pipeline. Inputting compressed air into the third air inlet 501 can assist the spring A403 to push the slider A402 to move, thereby increasing the speed at which the piston rod A800 pushes the raw material to be atomized and sprayed out.

[0045] In this embodiment, the piston head of the piston rod A800 and the inner cavity of the focusing nozzle 203 are of a matching cone, the outer shell of the focusing nozzle 203 and the inner cavity of the jet shell A600 are of a matching cone, and the focusing nozzle 203 is provided with a spray port at one end close to the jet shell A600. The piston rod A800 pushes the air in the inner cavity of the focusing nozzle 203, thereby forming a jet at the focusing nozzle 203, so that the gas and raw materials in the jet shell A600 are ejected; at the same time, the focusing nozzle 203 can be slidably installed in the nozzle active cavity 204 (such as Figure 6 As shown), after the piston rod A800 is pressed against the focusing nozzle 203, as the piston rod A800 continues to move, the piston rod A800 pushes the focusing nozzle 203 to move in the nozzle active chamber 204, so that the focusing nozzle 203 pushes the raw material and gas in the inner cavity of the jet shell A600 into the guide tube 700; a sealing sheet is arranged between the outer wall of the focusing nozzle 203 and the inner wall of the nozzle active chamber 204, after the focusing nozzle 203 is pressed against the inner wall of the jet shell A600, compressed air is introduced into the second air inlet 301 to make the piston rod A800 move away from the focusing nozzle 203, and at the same time, as the compressed air and raw material continue to enter the jet shell A600 through the first air inlet 202 and the injection hole A201, the pressure of the compressed air and raw material pushes the focusing nozzle 203 back to the initial position of the nozzle active chamber 204, so that the jet shell A600 is connected with the inner cavity of the guide tube 700 again, and the cycle is repeated.

[0046] In this embodiment, the guide tube 700 is threadedly connected to the inner cavity of the spray shell A600, and the guide tube 700 is used to adjust the length of the atomized spray.

[0047] In other embodiments, Figure 4 and Figure 5 As shown, a first V-shaped groove 701 is provided at the outlet end of the guide tube 700, and the groove width at the inlet end of the first V-shaped groove 701 is smaller than the inner diameter of the guide tube 700, and the groove width at the outlet end of the first V-shaped groove 701 is larger than the groove width at the inlet end, so that the gas-liquid mixture is instantly pressurized after entering the first V-shaped groove 701, and as the groove width increases, the gas-liquid mixture loses pressure, thereby generating a pressure drop, forming an atomization effect similar to a shower head, to enhance the effect of the atomized jet.

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

[0049] Embodiment 2:

[0050] like Fig.13 As shown, the difference between this embodiment and the first embodiment is that in this embodiment, the jet shell A600 is replaced by a jet shell B610, and no guide pipe is installed on the jet shell B610.

[0051] In this embodiment, the end of the inner cavity of the jet shell B610 close to the focusing nozzle 203 has a conical section that matches the focusing nozzle 203, and the end of the jet shell B610 away from the focusing nozzle 203 is provided with a trumpet-shaped nozzle, and the trumpet-shaped nozzle and the conical section are connected by an equal-diameter section.

[0052] The beneficial effect of this embodiment is that the focusing nozzle 203 can directly push the compressed air and raw materials to be sprayed out from the trumpet-shaped nozzle in atomization. When the installation height is fixed, the area of ​​the atomized plastic droplets of the trumpet-shaped nozzle is larger.

[0053] Embodiment three:

[0054] like Fig.15 As shown, the difference between this embodiment and the first embodiment is that:

[0055] In this embodiment, the second shell A200 is directly connected to the fourth shell B410, and one end of the fourth shell B410 away from the second shell A200 is connected to the fifth shell B500.

[0056] An active cavity B411 is provided in the fourth shell B410 , and a limit block 414 and a slider C412 are provided at both ends of the active cavity B411 , respectively, and a spring B413 is provided between the limit block 414 and the slider B412 .

[0057] The limit block 414 is fixedly arranged at one end of the active cavity B411 away from the second housing A200, and the slider C412 is sleeved on the piston rod B810; the fifth housing B500 is provided with an active cavity C511, and a slidable slider C512 is installed in the active cavity C511, and the piston rod B810 passes through the limit block 414 and is connected to the slider C512.

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

[0059] An active cavity B411 is provided in the fourth housing B410. A limit block 414 and a slider C412 are provided at both ends of the active cavity B411. A spring B413 is provided between the limit block 414 and the slider C412.

[0060] The end of the fourth shell B410 away from the second shell A200 is connected to the fifth shell B510, and an active chamber C511 is arranged in the fifth shell B510, in which a slider C512 is movably installed, and the slider C512 is connected to the end of the piston rod A800 away from the piston head; the end of the active chamber C511 away from the fourth shell B410 is provided with a connecting head 513, and the connecting head 513 is provided with a fourth air inlet hole 5131, and the fourth air inlet hole 5131 is connected to the compressed air pipeline.

[0061] In this embodiment, compressed air is inputted into the active chamber C511 from the fourth air inlet 5131, thereby pushing the slider C512 to move, and then pushing the piston rod B810 to move; at the same time, the raw material and compressed air are respectively inputted into the injection hole A211 and the first air inlet 212 of the second shell A200 at the same time, and after the compressed air and raw material enter the inside of the jet shell A600, the piston rod B810 pushes the flow nozzle 203 to move, so that the flow nozzle 203 squeezes out the raw material and compressed air. During the extrusion process, the raw material is blown by the compressed air and sprayed out in an atomized state. After the compressed air pipeline is disconnected, the pressure in the active chamber C511 disappears, and the spring B413 pushes the slider B412 back to the initial position. The reset method of the flow nozzle 203 refers to the first embodiment.

[0062] Embodiment 4:

[0063] like Fig.16 As shown, the combination of the jet shell A600 and the guide tube 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 trumpet-shaped nozzle (such as Figures 17 to 19 By providing a boss 613 on the end surface of the jet shell B610, the distance between the two bosses 613 gradually increases, thereby forming a 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, which will not be described in detail here.

[0065] Embodiment five:

[0066] like Fig.14 As shown, a third connecting hole 611 is opened in the jet shell B610 in this embodiment, and the third connecting hole 611 connects the first connecting hole 2011 with the trumpet-shaped nozzle of the jet shell B610; the second connecting hole 2012 is still connected with the inner cavity of the jet shell B610.

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

[0068] A rebound type glue dispensing gun, embodiment 1:

[0069] like Fig. 20 and Fig.21 As shown, the rebound-type dispensing gun includes a second shell B210, a first shell B110 and a piston rod C820; the piston rod C820 is elastically installed in the second shell B210, the first shell B110 is connected to the second shell B210, and the piston head of the piston rod C820 is located in the cavity of the first shell B110; a glue injection hole B211 is provided on the second shell B210, and the glue injection hole B211 is connected to the inner cavity of the second shell B210; a sealing ring 212 is provided in the inner cavity of the first shell B110, and the piston head of the piston rod C820 presses against the sealing ring 212 under the action of elasticity. When the raw material is 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 cavity of the first shell B110 and the inner cavity of the second shell B210 are connected to each other.

[0070] By elastically setting the piston rod C820 in the second shell B210, a sealing ring 212 is set in the inner cavity of the first shell B110; when the raw material is input into the second shell B210 from the injection hole B211, the piston rod C820 is pushed away from the sealing ring 212, so that the inner cavity of the second shell B210 and the inner cavity of the first shell B110 are connected, thereby realizing the output of the raw material; after the dripping of plastic is completed, the input of raw material into the injection hole B211 is stopped, and under the action of elasticity, the piston rod C820 automatically rebounds and presses against the sealing ring 212, so that the inner cavity of the second shell B210 and the inner cavity of the first shell B110 are disconnected, thereby realizing automatic closing. The present invention directly drives the piston rod C820 to move through the raw material, thereby realizing the output and disconnection of the raw material, and does not require an air source to drive the piston rod C820 to move, thereby saving air source costs.

[0071] The driving method of the piston rod C820 can refer to the driving method of the piston rod A800 or the piston rod B810. In this embodiment, the end of the second shell B210 away from the first shell B110 is also connected to the fourth shell A and the fifth shell A510 in sequence. The structure of the fourth shell A410 and the fifth shell A510 refers to the third embodiment of the spray dispensing gun.

[0072] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0074] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. Spray type dispensing gun, characterized by: It includes a second housing A (200), a piston rod A (800) and a jet shell A (600); The jet shell A (600) is installed at one end of the second shell A (200), the piston rod A (800) is movably installed 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 body 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 respectively connected to the inner cavity of the jet shell A (600) through a first connecting hole (2011) and a second connecting hole (2021).

2. The spray dispensing gun according to claim 1, characterized in that: A focusing nozzle (203) is also installed at one end of the second shell A (200), and the focusing nozzle (203) is located in the inner cavity of the spray shell A (600); The piston head of the piston rod A (800) is located in the focusing nozzle (203), and the piston rod A (800), the focusing nozzle (203) and the spray shell A (600) are coaxially arranged.

3. The spray dispensing gun according to claim 2, characterized in that: The other end of the second shell A (200) is provided with a third shell (300) and a fourth shell A (400) which are connected in sequence; The third shell (300) is provided with a second air inlet hole (301); The fourth housing A (400) is provided with an active chamber A (401), and the active chamber A (401) is provided with a spring A (403) and a slider A (402). One end of the piston rod A (800) away from the piston head is connected to one end of the slider A (402), and the other end of the slider A (402) is pressed against the spring A (403).

4. The spray dispensing gun according to claim 3, characterized in that: A fifth shell A (500) is also installed at one end of the fourth shell A (400) away from the third shell (300), and a third air inlet hole (501) is opened in the fifth shell A (500).

5. The spray dispensing gun according to claim 1, characterized in that: A flow guide pipe (700) is arranged inside the jet shell A (600).

6. The spray dispensing gun according to claim 2, characterized in that: One end of the second shell A (200) away from the jet shell A (600) is connected to the fourth shell B (410); The fourth housing B (410) is provided with an active cavity B (411), and two ends of the active cavity B (411) are respectively provided with a limit block (412) and a slider B (414), and a spring B (413) is provided between the limit block (412) and the slider B (414); The end of the fourth housing B (410) away from the second housing A (200) is connected to the fifth housing B (510), a movable chamber C (511) is provided in the fifth housing B (510), a slider C (512) is movably installed in the movable chamber C (511), and the slider C (512) is connected to the end of the piston rod A (800) away from the piston head; A connector (513) is provided at one end of the fifth shell B (510) away from the fourth shell B (410).

7. Rebound type dispensing gun, characterized by: It includes a second housing B (210), a first housing B (110) and a piston rod C (820); The piston rod C (820) is elastically mounted in the second housing B (210), the first housing B (110) is connected to 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 shell B (210) is provided with a glue injection hole B (211), and the glue injection hole B (211) is communicated with the inner cavity of the second shell B (210); The inner cavity of the first shell B (110) is provided with a sealing ring (212), and the piston head of the piston rod C (820) presses against the sealing ring (212) under the action of elasticity. When raw materials are injected into the injection hole B (211), the piston head of the piston rod C (820) moves away from the sealing ring (212), so that the inner cavity of the first shell B (110) and the inner cavity of the second shell B (210) are connected to each other.

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