Dispensing mechanism and dispensing machine thereof

Abstract

The utility model belongs to the technical field of dispensing equipment, and discloses a dispensing mechanism and a dispensing machine thereof, the dispensing mechanism comprises a glue supply cylinder and a rotating ring which can rotate relatively, the rotating ring is coaxially matched outside the glue supply cylinder, and a dispensing nozzle is fixed outside the rotating ring; a movable piston is arranged in the glue supply barrel, a glue storage cavity and a negative suction cavity are formed in the two sides of the piston respectively, a glue outlet and a glue return opening which are communicated with the glue storage cavity and the negative suction cavity respectively are formed in the glue supply barrel, and the glue dispensing nozzle is communicated with the glue outlet or the glue return opening through relative rotation of the glue supply barrel and the rotating ring. In conclusion, the dispensing mechanism disclosed by the utility model adopts a piston extrusion mode to discharge glue, the piston is matched to form the negative pressure cavity while moving, and then the dispensing nozzle can be communicated with the negative suction cavity after dispensing based on the rotation of the rotating ring, so that residual glue in the dispensing nozzle can be conveniently removed by negative suction, and the dispensing nozzle is prevented from being blocked.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the point gum equipment technical field, concretely relates to a kind of point gum mechanism and its point gum machine. BACKGROUND

[0002] Point gum mechanism is the mechanical structure commonly used on point gum machine or paster machine etc., and it is mainly used to drop, coat glue on the surface of workpiece or product inside. When performing point gum operation, glue is guided out by point gum nozzle of point gum mechanism, at this time, the inside of point gum nozzle will be full of glue, which will cause part of glue to remain in point gum nozzle after point gum is completed, if these residual glue is not cleaned in time, it will cause point gum nozzle to be blocked, and then affect subsequent point gum. SUMMARY

[0003] In view of this, to solve the problems raised in the above background art, the purpose of the utility model is to provide a kind of point gum mechanism and its point gum machine.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] A kind of point gum mechanism, including the supply of glue cylinder and swivel ring that can rotate relatively, the swivel ring is coaxially matched in the outside of the supply of glue cylinder, and the outside of the swivel ring is fixed with point gum nozzle;

[0006] The inside of the supply of glue cylinder is provided with movable piston, and the two sides of the piston are respectively glue storage cavity and negative suction cavity, glue outlet and return glue port are set on the supply of glue cylinder respectively with glue storage cavity and negative suction cavity are communicated, and the relative rotation of the supply of glue cylinder and swivel ring makes the point gum nozzle and glue outlet or return glue port are communicated.

[0007] Preferably, the side of the piston towards glue storage cavity is provided with guide inclined plane and guide inclined groove, the inside of the glue storage cavity is provided with movable push plate, one side of the push plate is provided with abutting inclined plane and sealing sliding block, and the abutting inclined plane is in sealing contact with the guide inclined plane, and the sealing sliding block is slidingly fitted in the guide inclined groove.

[0008] Preferably, the point gum mechanism further includes mounting bracket fixed to the outside of the supply of glue cylinder, and the mounting bracket is provided with driving gear bar engaged with the outside of the swivel ring.

[0009] Preferably, the outside of the supply of glue cylinder is detachably connected with mounting ring, and the swivel ring is rotatably sleeved on the outside of the mounting ring, two guide holes are further set on the mounting ring, and the guide holes are respectively communicated with glue outlet and return glue port.

[0010] Preferably, external thread is arranged on the outside of the supply of glue cylinder, and thread groove is arranged on the inner wall of the mounting ring, and the mounting ring is detachably mounted on the supply of glue cylinder through the screwing of external thread and thread groove.

[0011] Preferably, a first half slot is formed on the mounting ring, and a second half slot is formed on the glue supply cylinder, the first half slot and the second half slot combine to form a limiting slot, and a limiting pin is inserted into the limiting slot.

[0012] Preferably, the first half slot and the second half slot are threaded slots, and the limiting pin is a threaded pin.

[0013] A glue dispensing machine comprises the glue dispensing mechanism disclosed above.

[0014] A glue dispensing machine further comprises a support platform and a support frame, and the glue dispensing mechanism is supported above the support platform by the support frame.

[0015] Preferably, the support frame comprises an X-axis moving mechanism, a Y-axis moving mechanism and a Z-axis moving mechanism; the X-axis moving mechanism is installed on the support platform, the Y-axis moving mechanism is connected to the X-axis moving mechanism, the Z-axis moving mechanism is connected to the Y-axis moving mechanism, and the glue dispensing mechanism is connected to the Z-axis moving mechanism.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] (1) The glue dispensing mechanism adopts a piston extrusion mode to discharge glue, and a negative pressure cavity is formed at the same time as the piston moves, then the rotation of the rotary ring enables the glue dispensing nozzle to communicate with the negative suction cavity after completing glue dispensing, thereby facilitating the negative suction to remove the residual glue in the glue dispensing nozzle, avoiding the blockage of the glue dispensing nozzle on one hand, and realizing the recycling of residual glue on the other hand.

[0018] (2) The pushing surface of the piston is provided as an inclined surface, and a pushing plate is further provided, thereby effectively realizing the full extrusion of the glue in the glue storage cavity, and improving the rationality of the overall structure assembly.

[0019] (3) The rotary ring is detachably connected to the glue storage cylinder through the mounting ring, the mounting ring is rotatably connected to the glue discharge cylinder through the external thread and the threaded slot, and the mounting ring is further limited by the cooperation of the first half slot, the second half slot and the limiting pin, thereby effectively avoiding the influence of the rotation of the rotary ring on the positioning of the mounting ring. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a perspective view of the glue dispensing mechanism of the utility model;

[0021] Figure 2 It is an exploded view of the glue supply cylinder, the mounting ring and the limiting pin of the utility model;

[0022] Figure 3 It is a sectional view of the glue dispensing mechanism from the first perspective;

[0023] Figure 4 This is a cross-sectional view of the dispensing mechanism of this utility model from a second perspective;

[0024] Figure 5 This is a perspective view of the dispensing machine of this utility model;

[0025] In the diagram: Glue supply cylinder-1; Piston-11; Glue outlet-12; Glue return outlet-13; Push plate-14; Second half-groove-15; Rotary ring-2; Glue nozzle-3; Mounting bracket-4; Drive rack-5; Mounting ring-6; First half-groove-61; Limit pin-7; Support platform-10; Support frame-20. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1

[0028] like Figure 1 As shown, a dispensing mechanism includes a mounting frame 4, a dispensing cylinder 1, and a drive rack 5. The dispensing cylinder 1 is fixedly connected to the mounting frame 4, the drive rack 5 is rotatably connected to the mounting frame 4, and a motor for driving the drive rack 5 to rotate is also provided on the mounting frame 4.

[0029] Continue to refer to Figure 3 and Figure 4 As shown, the glue supply cylinder 1 has a movable piston 11 inside, and the piston 11 has a glue storage chamber and a negative suction chamber on both sides. The glue supply cylinder 1 has a glue outlet 12 and a glue return port 13 that are respectively connected to the glue storage chamber and the negative suction chamber.

[0030] Continue to refer to Figure 1 and Figure 3 As shown, a rotating ring 2 is rotatably mounted on the outside of the glue supply cylinder 1, and a dispensing nozzle 3 connected to the glue outlet 12 or the glue return port 13 is fixed on the outside of the rotating ring 2.

[0031] In this embodiment:

[0032] During dispensing, the piston 11 moves towards the glue storage chamber, squeezing the glue stored in the storage chamber from the glue outlet 12 to the dispensing nozzle 3 to perform dispensing.

[0033] After the dispensing work is completed, the motor is used to drive the driving gear rod 5 to rotate, and then drive the rotating ring 2 to rotate 180°, so that the dispensing nozzle 3 is in communication with the glue returning port 13. During the dispensing work, the movement of the piston 11 forms a certain negative pressure in the negative suction chamber. Based on this, when the dispensing nozzle 3 is in communication with the glue returning port 13, the glue remaining in the dispensing nozzle 3 can be sucked back into the negative suction chamber through the negative pressure, so as to avoid the dispensing nozzle 3 being blocked by the remaining glue.

[0034] Further, the side of the piston 11 towards the glue storage chamber is provided with a guide inclined surface and a guide inclined groove, and the glue storage chamber is provided with a movable push plate 14. The push plate 14 is provided with a contact inclined surface and a sealing sliding block on one side, and the contact inclined surface is in sealing contact with the guide inclined surface, and the sealing sliding block is slidingly fitted in the guide inclined groove. Based on this, an electric push rod for driving the push plate 14 to move can be installed at one end of the glue supply cylinder 1. Thus, when the electric push rod pushes the push plate 14 to move, the push plate 14 can drive the piston 11 to move through the cooperation of the sealing sliding block and the guide inclined groove. Based on this, the rationality of the overall structure assembly is improved while ensuring effective glue discharge.

[0035] Embodiment Two

[0036] As shown in Figure 1 , a dispensing mechanism includes a mounting frame 4, a glue supply cylinder 1 and a driving gear rod 5. The glue supply cylinder 1 is fixedly connected to the mounting frame 4, and the driving gear rod 5 is rotatably connected to the mounting frame 4. An electric motor for driving the driving gear rod 5 to rotate is also provided on the mounting frame 4.

[0037] Continuing to refer to Figure 3 and Figure 4 , the inside of the glue supply cylinder 1 is provided with a movable piston 11, and the two sides of the piston 11 are respectively a glue storage chamber and a negative suction chamber. The glue supply cylinder 1 is provided with a glue outlet 12 and a glue returning port 13 which are respectively in communication with the glue storage chamber and the negative suction chamber.

[0038] Continuing to refer to Figure 1 and Figure 2 , an external thread is provided on the outside of the glue supply cylinder 1, and a mounting ring 6 (a threaded groove is provided on the inner wall of the mounting ring 6) is detachably screwed on the outside of the glue supply cylinder 1 through the external thread. Two guide holes are provided on the mounting ring 6, which are respectively in communication with the glue outlet 12 and the glue returning port 13. A rotating ring 2 is rotatably provided on the outside of the mounting ring 6, and a dispensing nozzle 3 is fixedly provided on the outside of the rotating ring 2 and in communication with one of the guide holes.

[0039] In this embodiment:

[0040] During dispensing work, the movement of the piston 11 towards the glue storage chamber extrudes the glue stored in the glue storage chamber from the glue outlet 12 to the dispensing nozzle 3 to perform dispensing;

[0041] After the dispensing operation is completed, the motor drives the gear rack 5 to rotate, which in turn drives the rotating ring 2 to rotate 180°, thereby connecting the dispensing nozzle 3 with the return port 13. During the dispensing operation, the movement of the piston 11 creates a certain negative pressure in the negative suction chamber. Based on this, when the dispensing nozzle 3 is connected to the return port 13, the negative pressure can draw the residual glue in the dispensing nozzle 3 back into the negative suction chamber, thus preventing the dispensing nozzle 3 from being blocked by residual glue.

[0042] Furthermore, a first half-groove 61 (threaded groove) is formed on the mounting ring 6, and a second half-groove 15 (threaded groove) is formed on the glue supply cylinder 1. The first half-groove 61 and the second half-groove 15 combine to form a limiting groove, and a limiting pin 7 (threaded pin) is inserted into the limiting groove. Based on this, the glue dispensing nozzle 3 can be replaced by rotating and disassembling the limiting pin 7 and the mounting ring 6, and the limiting pin 7 can effectively prevent the rotation of the rotating ring 2 from affecting the positioning of the mounting ring 6.

[0043] Example 3

[0044] like Figure 5 As shown, a dispensing machine includes a support platform 10, a support frame 20, and the dispensing mechanism disclosed in Embodiment 1 or Embodiment 2 above.

[0045] In this embodiment, the support frame 20 includes an X-axis moving mechanism, a Y-axis moving mechanism, and a Z-axis moving mechanism. Specifically, two X-axis moving mechanisms (such as linear motor mechanisms, motor lead screw mechanisms, etc.) are symmetrically arranged on the support platform 10. The Y-axis moving mechanism (such as linear motor mechanisms, motor lead screw mechanisms, etc.) is connected between the two X-axis moving mechanisms. The Z-axis moving mechanism (such as a hydraulic lifting mechanism) is connected to the Y-axis moving mechanism. The mounting frame 4 of the dispensing mechanism is connected to the Z-axis moving mechanism, thereby flexibly realizing the three-axis movement of the dispensing mechanism.

[0046] During the dispensing operation, the workpiece is placed on the support platform 10, and then the dispensing mechanism is moved to the designated position on the workpiece by the X-axis moving mechanism, Y-axis moving mechanism and Z-axis moving mechanism to perform the dispensing operation.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dispensing mechanism, characterized by: The glue supply cylinder (1) and the rotating ring (2) can rotate relatively, the rotating ring (2) is coaxially matched with the outside of the glue supply cylinder (1), and the glue nozzle (3) is fixed outside the rotating ring (2); The inside of the glue supply cylinder (1) is provided with a movable piston (11), and the two sides of the piston (11) are respectively a glue storage cavity and a negative suction cavity. The glue supply cylinder (1) is provided with a glue outlet (12) and a glue return port (13) which respectively communicate with the glue storage cavity and the negative suction cavity, and the glue nozzle (3) is communicated with the glue outlet (12) or the glue return port (13) through the relative rotation of the glue supply cylinder (1) and the rotating ring (2).

2. The glue dispensing mechanism of claim 1, wherein: The side of the piston (11) facing the glue storage cavity is provided with a guide inclined surface and a guide inclined groove, the glue storage cavity is provided with a movable push plate (14), one side of the push plate (14) is provided with a resisting inclined surface and a sealing sliding block, and the resisting inclined surface is in sealing contact with the guide inclined surface, and the sealing sliding block is slidingly matched in the guide inclined groove.

3. The glue dispensing mechanism of claim 1, wherein: The mounting frame (4) is fixed to the outside of the glue supply cylinder (1), and the driving tooth rod (5) engaged with the outside of the rotating ring (2) is arranged on the mounting frame (4).

4. The adhesive dispensing mechanism of claim 1, wherein: The mounting ring (6) is detachably connected to the outside of the glue supply cylinder (1), the rotating ring (2) is rotatably arranged outside the mounting ring (6), and two guide holes respectively communicating with the glue outlet (12) and the glue return port (13) are arranged on the mounting ring (6).

5. The adhesive dispensing mechanism of claim 4, wherein: The outside of the glue supply cylinder (1) is provided with external threads, the inner wall of the mounting ring (6) is provided with a threaded groove, and the mounting ring (6) is detachably mounted on the glue supply cylinder (1) through the screwing of the threaded groove and the external threads.

6. The adhesive dispensing mechanism of claim 5, wherein: A first half groove (61) is arranged on the mounting ring (6), a second half groove (15) is arranged on the glue supply cylinder (1), the first half groove (61) and the second half groove (15) form a limiting groove, and a limiting pin (7) is inserted into the limiting groove.

7. The adhesive dispensing mechanism of claim 6, wherein: The first half groove (61) and the second half groove (15) are threaded grooves, and the limiting pin (7) is a threaded pin.

8. A glue dispenser, characterized in that: The glue dispensing mechanism comprises the glue dispensing mechanism according to any one of claims 1-7.

9. The adhesive dispenser of claim 8, wherein: The glue dispensing mechanism is further provided with a support platform (10) and a support frame (20), and the glue dispensing mechanism is supported above the support platform (10) through the support frame (20).

10. The adhesive dispenser of claim 9, wherein: The support frame (20) comprises an X-axis moving mechanism, a Y-axis moving mechanism and a Z-axis moving mechanism; the X-axis moving mechanism is mounted on the support platform (10), the Y-axis moving mechanism is connected to the X-axis moving mechanism, the Z-axis moving mechanism is connected to the Y-axis moving mechanism, and the glue dispensing mechanism is connected to the Z-axis moving mechanism.

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