Automatic changing mechanism of dispensing machine

Abstract

This invention discloses an automatic part-changing mechanism for a dispensing machine. The dispensing unit includes: a dispensing cylinder, a valve body located on one side of the dispensing cylinder, and a glue inlet block installed on the lower end face of the valve body. A glue inlet block with a glue flow channel is connected to the lower end of the dispensing cylinder. An elastic gasket is sealed and installed on the glue inlet block outside the horizontal section of the glue flow channel. A connecting pin has a flow channel hole at one end within a mounting hole, and a transition flow channel is formed between the other end and the flow channel hole. A nut is installed at the end of the flow channel hole opposite to the transition flow channel. A spring is provided between the end face of the nut and a ball disposed within a conical through hole. This invention enables automatic continuous operation of the dispensing process. During the dispensing cylinder replacement process, it can quickly connect the glue flow channel, effectively prevent residual glue overflow, and quickly cut off the flow, thus not only preventing glue overflow but also maintaining the stability and consistency of the glue before and after dispensing cylinder replacement.

Description

Technical Field

[0001] This invention relates to the field of dispensing technology, and in particular to an automatic part changing mechanism for a dispensing machine. Background Technology

[0002] Dispensing, also known as gluing, coating, potting, or dripping, is a process that involves applying electronic adhesives, oils, or other liquids to products through coating, potting, or dripping to achieve functions such as adhesion, encapsulation, insulation, fixation, and surface smoothing. Current dispensing technologies require manual replacement of the glue cartridge after the adhesive is used up, making automatic cartridge replacement impossible during continuous dispensing. Furthermore, during cartridge replacement, the adhesive flow path cannot be quickly connected, leading to overflow of residual adhesive in the cartridge. Additionally, rapid shut-off is not possible, causing adhesive to easily spill from the valve and making it difficult to maintain adhesive stability and consistency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an automatic part changing mechanism for a dispensing machine. The automatic part changing mechanism of the dispensing machine realizes automatic and continuous operation of the dispensing process. During the replacement of the glue supply cylinder, it can quickly connect the glue flow channel, effectively avoid the overflow of residual glue, and quickly cut off the flow. Thus, it not only avoids glue overflow, but also maintains the stability and consistency of glue before and after the glue supply cylinder is replaced.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is: an automatic part changing mechanism for a dispensing machine, used for dispensing a dispensing unit, the dispensing unit including: a glue supply cylinder, a valve body located on one side of the glue supply cylinder, and a glue inlet block installed on the lower end face of the valve body, the glue inlet block having a glue inlet channel and a glue outlet channel respectively connected to each other, the part changing mechanism including: a three-axis drive mechanism installed on the machine base, the valve body installed on the three-axis drive mechanism, the glue supply cylinder connected to the side of the valve body opposite to the three-axis drive mechanism, at least two material seats for placing the glue supply cylinder installed on the machine base, a glue supply block having a glue supply channel inside connected to the lower end of the glue supply cylinder, a connecting block having a connecting channel inside installed on the side end face of the glue inlet block facing the glue supply block, the upper end of the vertical section of the glue supply channel communicating with the glue outlet of the glue supply cylinder, and the horizontal section of the glue supply channel extending towards the connecting block at the end opposite to the vertical section;

[0005] An elastic gasket is sealed and installed on the glue supply block and on the outer side of the horizontal section of the glue supply channel. A mounting hole communicating with the communication channel is opened on the side end face of the connecting block facing the glue supply block. One end of a connecting pin is embedded in the mounting hole, and a flow channel hole is opened on the end face of the connecting pin at the end of the mounting hole. A transition flow channel with an inner diameter smaller than the inner diameter of the flow channel hole is opened between the other end of the connecting pin and the flow channel hole. The transition flow channel and the flow channel hole are connected by a tapered through hole. A nut with a central through hole is installed on the end of the flow channel hole opposite to the transition flow channel. A spring in a compressed state is horizontally arranged between the end face of the nut and a ball set in the tapered through hole, so that the ball with a diameter larger than the inner diameter of the transition flow channel can be pressed and contacted with the inner wall of the tapered through hole. When the end of the connecting pin away from the mounting hole passes through the elastic gasket, one end of the transition flow channel communicates with the glue supply channel on the glue supply block.

[0006] The following are further improvements to the above technical solution:

[0007] 1. In the above solution, the upper surface of the material holder is provided with a receiving hole for the glue supply cylinder to be inserted. The receiving hole is in communication with the side surface of the material holder facing the three-axis drive mechanism. A baffle is installed on the side of the material holder facing the three-axis drive mechanism and on both sides of the receiving hole. When the glue supply cylinder is inserted into the receiving hole, the baffle contacts the glue supply cylinder.

[0008] 2. In the above scheme, at least one of the receiving holes of the material holder is fitted with a glue supply cylinder, and at least one of the receiving holes of the material holder is not fitted with a glue supply cylinder.

[0009] 3. In the above scheme, the valve body is mounted on the Z-axis drive unit of the three-axis drive mechanism via a support plate. A pressure cylinder is mounted on the vertically arranged support plate above the valve body. A support frame is mounted on the piston rod of the pressure cylinder. The horizontal part of the support frame, which can move vertically, extends to the top of the glue supply cylinder connected to the valve body and is equipped with an air nozzle. An air inlet that cooperates with the air nozzle is opened on the upper surface of the glue supply cylinder. When the support frame moves to the lower position, the air nozzle connects with the air inlet on the glue supply cylinder.

[0010] 4. In the above scheme, an electrical connector sub-terminal is installed on the upper end face of the valve body, and an electrical connector female-terminal that mates with the electrical connector sub-terminal is installed on the horizontal part of the support frame. When the support frame moves to the lower position, the electrical connector female-terminal and the electrical connector sub-terminal on the valve body are electrically connected.

[0011] 5. In the above scheme, the glue supply cylinder is embedded in a support base. A first magnet is installed on the side of the support base facing the valve body, and a second magnet that cooperates with the first magnet is installed on the side of a fixing block installed on the valve body facing the support base. When the connecting needle is inserted into the glue supply channel, the first magnet and the second magnet are attracted and fixed.

[0012] 6. In the above scheme, the first magnet and the second magnet are both strong magnets or both are electromagnets.

[0013] 7. In the above scheme, the first magnet and the second magnet are respectively embedded in the receiving grooves opened on the support base and the fixing block.

[0014] 8. In the above scheme, the glue outlet at the lower end of the glue supply cylinder is connected to the glue supply channel on the glue supply block through a connecting nozzle.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0016] 1. The automatic part-changing mechanism of the dispensing machine of the present invention comprises a valve body mounted on a three-axis drive mechanism, a glue supply cylinder connected to the side of the valve body opposite to the three-axis drive mechanism, at least two material seats for placing the glue supply cylinder mounted on the machine base, a glue supply block with a glue supply channel inside connected to the lower end of the glue supply cylinder, a connecting block with a connecting channel inside mounted on the side end face of the glue supply block facing the glue supply block, the upper end of the vertical section of the glue supply channel communicating with the glue outlet of the glue supply cylinder, and the horizontal section of the glue supply channel extending towards the connecting block at the end opposite to the vertical section, with the glue supply block located on and near the glue supply channel. An elastic gasket is installed on the outer side of the horizontal section of the channel. A mounting hole communicating with the flow channel is opened on the side end face of the connecting block facing the adhesive supply block. One end of a connecting pin is embedded in the mounting hole, and a flow channel hole is opened on the end face of the connecting pin located in the mounting hole. A transition flow channel with an inner diameter smaller than the inner diameter of the flow channel hole is opened between the other end of the connecting pin and the flow channel hole. The transition flow channel and the flow channel hole are connected by a tapered through hole. A nut with a central through hole is installed on the end of the flow channel hole opposite to the transition flow channel. The end face of the nut is connected to a nut located in the tapered through hole. A spring under compression is horizontally arranged between the spheres, allowing a sphere with a diameter larger than the inner diameter of the transition channel to press against the inner wall of the tapered through-hole. When the end of the connecting pin away from the mounting hole passes through the elastic gasket, one end of the transition channel connects with the glue supply channel on the glue supply block. Through the movement of the three-axis mechanism, the old glue supply cylinder connected to the valve body can be automatically placed into the receiving hole of the material seat and separated from the valve body. Then, the valve body is connected to the new glue supply cylinder in another material seat, thereby realizing automatic continuous operation of the dispensing process, improving dispensing efficiency, and in During the process of replacing the glue supply cylinder connected to the valve body, the connecting pin can be quickly inserted and removed to achieve rapid connection between the glue inlet block on the valve body and the glue flow channel inside the glue supply block on the new glue supply cylinder. It can also effectively prevent the overflow of residual glue in the old glue supply cylinder when the valve body is separated from the old glue supply cylinder. Furthermore, it can quickly cut off the flow channel inside the glue inlet block on the valve body when the valve body is separated from the old glue supply cylinder. This not only prevents the overflow of glue in the glue inlet block, but also maintains the stability and consistency of the glue flow channel before and after replacing the glue supply cylinder, thereby ensuring the consistency of glue dispensing quality.

[0017] 2. The automatic part-changing mechanism of the dispensing machine of the present invention has a valve body mounted on the Z-axis drive unit of a three-axis drive mechanism via a support plate. A pressure cylinder is mounted on the vertically arranged support plate above the valve body. A support frame is mounted on the piston rod of the pressure cylinder. The horizontal part of the support frame, which can move vertically, extends to the top of the glue supply cylinder connected to the valve body and is equipped with an air nozzle. An air inlet that mates with the air nozzle is opened on the upper surface of the glue supply cylinder. When the support frame moves to the lower position, the air nozzle connects with the air inlet on the glue supply cylinder. Based on improving the flowability of the glue during the glue supply process to the valve body by venting air into the glue supply cylinder, automatic venting can be achieved. The loading and unloading of components with new and old glue supply cylinders further improves the automation level and operational stability of the entire continuous dispensing process. Furthermore, the glue supply cylinder is embedded in a support base. A first magnet is mounted on the side of the support base facing the valve body, and a second magnet, which mates with the first magnet, is mounted on a fixing block on the valve body facing the support base. When the connecting needle is inserted into the glue supply channel, the first and second magnets attract and fix each other. This facilitates the disassembly and replacement of the glue supply cylinder connected to the valve body, while also achieving a quick and stable connection between the valve body and the glue supply cylinder, thereby improving the stability of glue supply from the glue supply cylinder to the valve body and the glue dispensing process within the valve body. Attached Figure Description

[0018] Appendix Figure 1 This is a schematic diagram of the automatic part changing mechanism of the dispensing machine of the present invention;

[0019] Appendix Figure 2 Appendix to this invention Figure 1 Enlarged view of point A in the middle;

[0020] Appendix Figure 3 This is a partial structural schematic diagram of the automatic part changing mechanism of the dispensing machine of the present invention;

[0021] Appendix Figure 4 This is a partial structural cross-sectional view of the automatic part changing mechanism of the dispensing machine of the present invention;

[0022] Appendix Figure 5 Appendix to this invention Figure 4 Enlarged view of point B in the middle;

[0023] Appendix Figure 6 Appendix to this invention Figure 4 Enlarged view of point C in the middle;

[0024] Appendix Figure 7 Appendix to this invention Figure 6 Enlarged view of point D in the middle;

[0025] Appendix Figure 8 This is a partial structural breakdown diagram of the automatic part changing mechanism of the dispensing machine of the present invention. Figure 1 ;

[0026] Appendix Figure 9 This is a partial structural breakdown diagram of the automatic part changing mechanism of the dispensing machine of the present invention. Figure 2 .

[0027] In the attached diagrams: 1. Glue supply block; 2. Connecting block; 3. Glue supply channel; 31. Vertical section; 32. Horizontal section; 4. Connecting channel; 5. Elastic gasket; 6. Mounting hole; 7. Connecting pin; 71. Transition channel; 72. Connecting part; 73. Conical part; 8. Mounting groove; 9. Pressure block; 10. Channel hole; 11. Conical through hole; 12. Nut; 121. Central through hole; 13. Ball; 14. Spring; 15. Machine base; 16. Three-axis drive mechanism; 17. Material holder; 171. Accommodation hole; 172. Stop bar; 18. Sealing ring; 19. 21. Glue supply cylinder; 211. Glue outlet; 22. Valve body; 23. Glue inlet block; 231. Glue inlet channel; 232. Glue outlet channel; 24. Connecting nozzle; 25. Air inlet; 261. Support base; 262. Fixing block; 271. First magnet; 272. Second magnet; 28. Air nozzle; 29. ​​Electrical connector (sub-terminal); 30. Electrical connector (female-end); 33. Support plate; 34. Downward pressure cylinder; 35. Support frame; 351. Horizontal section; 36. Air nozzle; 37. Electrical connector (sub-terminal); 38. Electrical connector (female-end); 39. Receiving groove. Detailed Implementation

[0028] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0029] Example 1: An automatic part-changing mechanism for a dispensing machine, used for dispensing a dispensing unit, the dispensing unit including: a glue supply cylinder 21, a valve body 22 located on one side of the glue supply cylinder 21, and a glue inlet block 23 installed on the lower end face of the valve body 22. The glue inlet block 23 has a glue inlet channel 231 and a glue outlet channel 232 that are interconnected. The part-changing mechanism includes: a three-axis drive mechanism 16 installed on the machine base 15, the valve body 22 being installed on the three-axis drive mechanism 16, and the glue supply cylinder 21 being connected to the valve body 22 on the opposite side. On one side of the three-axis drive mechanism 16, at least two material seats 16 for placing glue supply cylinders 21 are installed on the machine base 15. The lower end of the glue supply cylinder 21 is connected to a glue supply block 1 with a glue supply channel 3 inside. A connecting block 2 with a connecting channel 4 inside is installed on the side end face of the glue inlet block 23 facing the glue supply block 1. The upper end of the vertical section 31 of the glue supply channel 3 is connected to the glue outlet 211 of the glue supply cylinder 21. The horizontal section 32 of the glue supply channel 3 extends towards the connecting block 2 from the end opposite to the vertical section 31.

[0030] Under normal dispensing conditions, the valve body connected to the glue supply cylinder is driven by the three-axis drive mechanism to move above the product to be dispensed. At the same time, the glue supply cylinder supplies glue to the valve body, and the valve body dispenses glue in precise quantities, so as to realize continuous dispensing operation on the product.

[0031] An elastic gasket 5 is sealed and installed on the glue supply block 1 and outside the horizontal section 32 of the glue supply channel 3. A mounting hole 6 communicating with the connecting channel 4 is opened on the side end face of the connecting block 2 facing the glue supply block 1. One end of a connecting pin 7 is embedded in the mounting hole 6, and a flow channel hole 10 is opened on the end face of the connecting pin 7 located in the mounting hole 6. A transition flow channel 71 with an inner diameter smaller than the inner diameter of the flow channel hole 10 is opened between the other end of the connecting pin 7 and the flow channel hole 10. A cone-shaped connection is used between the transition flow channel 71 and the flow channel hole 10. The conical through hole 11 is connected, and a nut 12 with a central through hole 121 is installed at one end of the flow channel hole 10 opposite to the transition flow channel 71. A spring 14 in a compressed state is horizontally arranged between the end face of the nut 12 and a ball 13 disposed in the conical through hole 11, so that the ball 13, whose diameter is larger than the inner diameter of the transition flow channel 71, can be pressed into contact with the inner wall of the conical through hole 11. When the end of the connecting pin 7 away from the mounting hole 6 passes through the elastic gasket 5, one end of the transition flow channel 71 is connected to the glue supply flow channel 3 on the glue supply block 1.

[0032] The material holder 16 has an accommodating hole 161 on its upper surface for inserting the glue supply cylinder 21. The accommodating hole 161 communicates with the side surface of the material holder 16 facing the three-axis drive mechanism 16. A baffle 162 is installed on the side of the material holder 16 facing the three-axis drive mechanism 16 and on both sides of the accommodating hole 161. When the glue supply cylinder 21 is inserted into the accommodating hole 161, the baffle 162 blocks the glue supply cylinder 21 from contact.

[0033] At least one of the material holders 16 has a glue supply cylinder 21 embedded in its receiving hole 161, and at least one of the material holders 16 has no glue supply cylinder 21 installed in its receiving hole 161.

[0034] The aforementioned glue supply cylinder 21 is embedded in a support base 261. A first magnet 271 is installed on the side of the support base 261 facing the valve body 22. A second magnet 272 that cooperates with the first magnet 271 is installed on the side of a fixing block 262 installed on the valve body 22 facing the support base 261. When the connecting needle 7 is inserted into the glue supply channel 3, the first magnet 271 and the second magnet 272 are attracted and fixed.

[0035] The second magnet installed on the valve body and the first magnet installed on the glue supply cylinder are attracted and fixed together, realizing a quick connection between the valve body and the glue supply cylinder with good connection stability, thereby improving the stability of glue supply from the glue supply cylinder to the valve body and glue dispensing from the valve body.

[0036] Both the first magnet 271 and the second magnet 272 mentioned above are strong magnets.

[0037] The first magnet 271 and the second magnet 272 are respectively embedded in the receiving grooves 39 opened on the support base 261 and the fixing block 262.

[0038] The glue outlet 211 at the lower end of the glue supply cylinder 21 is connected to the glue supply channel 3 on the glue supply block 1 through a connecting nozzle 24.

[0039] The aforementioned adhesive supply block 1 is integrally formed on the lower part of the support base 261.

[0040] The valve body 22 mentioned above is the injection valve body.

[0041] The lower end of the inclined connecting channel 4 is connected to one end of the glue inlet channel 231 that extends horizontally on the glue inlet block 23, opposite to the glue outlet channel 232.

[0042] A sealing ring 20 is provided between the connecting block 2 and the glue inlet block 23 and on the outside of the connection between the connecting channel 4 and the glue inlet channel 231.

[0043] The aforementioned mounting hole 6 is connected to the upper end of the connecting channel 4.

[0044] The elastic gasket 5 mentioned above is a rubber gasket.

[0045] Example 2: An automatic part-changing mechanism for a dispensing machine, used for dispensing a dispensing unit, the dispensing unit including: a glue supply cylinder 21, a valve body 22 located on one side of the glue supply cylinder 21, and a glue inlet block 23 installed on the lower end face of the valve body 22. The glue inlet block 23 has a glue inlet channel 231 and a glue outlet channel 232 that are interconnected. The part-changing mechanism includes: a three-axis drive mechanism 16 installed on the machine base 15, the valve body 22 being installed on the three-axis drive mechanism 16, and the glue supply cylinder 21 being connected to the valve body 22 on the opposite side. On one side of the three-axis drive mechanism 16, at least two material seats 16 for placing glue supply cylinders 21 are installed on the machine base 15. The lower end of the glue supply cylinder 21 is connected to a glue supply block 1 with a glue supply channel 3 inside. A connecting block 2 with a connecting channel 4 inside is installed on the side end face of the glue inlet block 23 facing the glue supply block 1. The upper end of the vertical section 31 of the glue supply channel 3 is connected to the glue outlet 211 of the glue supply cylinder 21. The horizontal section 32 of the glue supply channel 3 extends towards the connecting block 2 from the end opposite to the vertical section 31.

[0046] An elastic gasket 5 is sealed and installed on the glue supply block 1 and outside the horizontal section 32 of the glue supply channel 3. A mounting hole 6 communicating with the connecting channel 4 is opened on the side end face of the connecting block 2 facing the glue supply block 1. One end of a connecting pin 7 is embedded in the mounting hole 6, and a flow channel hole 10 is opened on the end face of the connecting pin 7 located in the mounting hole 6. A transition flow channel 71 with an inner diameter smaller than the inner diameter of the flow channel hole 10 is opened between the other end of the connecting pin 7 and the flow channel hole 10. A cone-shaped connection is used between the transition flow channel 71 and the flow channel hole 10. The conical through hole 11 is connected, and a nut 12 with a central through hole 121 is installed at one end of the flow channel hole 10 opposite to the transition flow channel 71. A spring 14 in a compressed state is horizontally arranged between the end face of the nut 12 and a ball 13 disposed in the conical through hole 11, so that the ball 13, whose diameter is larger than the inner diameter of the transition flow channel 71, can be pressed into contact with the inner wall of the conical through hole 11. When the end of the connecting pin 7 away from the mounting hole 6 passes through the elastic gasket 5, one end of the transition flow channel 71 is connected to the glue supply flow channel 3 on the glue supply block 1.

[0047] The three-axis drive mechanism moves the valve body, causing the old glue supply cylinder connected to the valve body to move into an empty material seat. Then, the three-axis drive mechanism moves the valve body away from the old glue supply cylinder. At this time, the old glue supply cylinder is restricted by the material seat and cannot move with the valve body, thus pulling the connecting pin installed on the valve body out of the glue supply channel on the glue supply block installed on the old glue supply cylinder. At this time, the glue remaining in the glue supply channel will not overflow under the action of the elastic gasket, and the ball in the conical through hole, no longer subjected to the pressure of the glue, is squeezed and contacted with the inner wall of the conical through hole under the action of the spring, realizing a rapid seal on the flow channel inside the glue inlet block. This can prevent the glue from overflowing inside the glue inlet block and maintain the stability and consistency of the glue in the glue outlet channel before and after changing the glue supply cylinder, thereby ensuring the consistency of dispensing quality.

[0048] The material holder 16 has an accommodating hole 161 on its upper surface for inserting the glue supply cylinder 21. The accommodating hole 161 communicates with the side surface of the material holder 16 facing the three-axis drive mechanism 16. A baffle 162 is installed on both sides of the material holder 16 facing the three-axis drive mechanism 16 and on both sides of the accommodating hole 161. When the glue supply cylinder 21 is inserted into the accommodating hole 161, the baffle 162 blocks the glue supply cylinder 21 from contact.

[0049] Then, the three-axis drive mechanism drives the valve body to move to the outside of the new glue supply cylinder installed in another material seat, so that the connecting pin connected to the valve body is at the same height as the elastic gasket on the new glue supply cylinder. Then, the three-axis drive mechanism drives the valve body to approach the new glue supply cylinder and inserts the connecting pin through the elastic gasket on the new glue supply cylinder into the glue supply channel.

[0050] At least one of the material holders 16 has a glue supply cylinder 21 embedded in its receiving hole 161, and at least one of the material holders 16 has no glue supply cylinder 21 installed in its receiving hole 161.

[0051] The valve body 22 is mounted on the Z-axis drive unit of the three-axis drive mechanism via a support plate 33. A pressure cylinder 34 is mounted on the vertically arranged support plate 33 above the valve body 22. A support frame 35 is mounted on the piston rod of the pressure cylinder 34. The horizontal part 351 of the support frame 35, which can move in the vertical direction, extends to the top of the glue supply cylinder 21 connected to the valve body 22 and is equipped with an air nozzle 28. An air inlet 25 that cooperates with the air nozzle 28 is opened on the upper surface of the glue supply cylinder 21. When the support frame 35 moves to the lower position, the air nozzle 28 connects with the air inlet 25 on the glue supply cylinder 21.

[0052] During the process of supplying glue from the glue supply cylinder to the valve body, high-pressure gas is injected into the glue supply cylinder through the air inlet at the top of the glue supply cylinder, which pushes the glue liquid in the glue supply cylinder to flow towards the valve body.

[0053] When the glue in the glue supply cylinder is used up, the air injection stops and the valve body stops dispensing glue. The air nozzle moves upward with the support frame and separates from the air inlet on the upper surface of the glue supply cylinder.

[0054] An electrical connector 29 is installed on the upper surface of the valve body 22. An electrical connector 30 that mates with the electrical connector 29 is installed on the horizontal part 351 of the support frame 35. When the support frame 35 moves to the lower position, the electrical connector 30 is electrically connected to the electrical connector 29 on the valve body 22.

[0055] The valve body 22 mentioned above is a piezoelectric ceramic injection valve body.

[0056] The lower end of the inclined connecting channel 4 is connected to one end of the glue inlet channel 231 that extends horizontally on the glue inlet block 23, opposite to the glue outlet channel 232.

[0057] The aforementioned threaded nut 12 is connected to the inner wall of the flow channel hole 10 by a thread.

[0058] The aforementioned sphere 13 is a ceramic sphere.

[0059] The aforementioned elastic gasket 5 is a silicone gasket.

[0060] The aforementioned elastic pad 5 has a cross groove through which the connecting pin 7 passes.

[0061] The aforementioned connecting pin 7 further includes a connecting portion 72 that is threaded to the inner wall of the mounting hole 6 and a tapered portion 73 that can pass through the elastic gasket 5, wherein the outer diameter of the tapered portion 73 gradually decreases in the direction away from the connecting portion 72.

[0062] The aforementioned glue supply block 1 has an installation groove 8 on its side face facing the connecting block 2, which communicates with the glue supply channel 3. The elastic gasket 5, which is embedded in the installation groove 8, has a pressure block 9 on its side opposite to the glue supply channel 3. The pressure block 9, which is fixedly connected to the glue supply block 1, presses against one side surface of the elastic gasket 5, thereby causing the other side surface of the elastic gasket 5 to press against the bottom surface of the installation groove 8.

[0063] The aforementioned pressure block 9 has a clearance through hole 19 for the connecting pin 7 to pass through.

[0064] The working principle of this invention is as follows:

[0065] Under normal dispensing conditions, the valve body connected to the glue supply cylinder is driven by the three-axis drive mechanism to move above the product to be dispensed. At the same time, the glue supply cylinder supplies glue to the valve body, and the valve body dispenses glue in precise quantities, so as to realize continuous dispensing operation on the product.

[0066] During the process of supplying glue from the glue supply cylinder to the valve body, high-pressure gas is injected into the glue supply cylinder through the air inlet at the top of the glue supply cylinder, which pushes the glue liquid in the glue supply cylinder to flow towards the valve body.

[0067] When the glue in the glue supply cylinder is used up, the air injection stops and the valve body stops dispensing glue. The air nozzle moves upward with the support frame and separates from the air inlet on the upper surface of the glue supply cylinder.

[0068] Next, the three-axis drive mechanism drives the valve body to move, causing the old glue supply cylinder connected to the valve body to move into an empty material seat. Then, the three-axis drive mechanism drives the valve body away from the old glue supply cylinder. At this time, the old glue supply cylinder is restricted by the material seat and cannot move with the valve body, thereby pulling the connecting pin installed on the valve body out of the glue supply channel on the glue supply block installed on the old glue supply cylinder. At this time, the glue remaining in the glue supply channel will not overflow under the action of the elastic gasket, and the ball in the conical through hole, which is no longer subjected to the glue pressure, is squeezed and contacted with the inner wall of the conical through hole under the action of the spring to achieve a quick seal on the flow channel in the glue inlet block. This can prevent the glue in the glue inlet block from overflowing and maintain the stability and consistency of the glue in the glue outlet channel before and after changing the glue supply cylinder, thereby ensuring the consistency of dispensing quality.

[0069] Subsequently, the three-axis drive mechanism drives the valve body to move to the outside of the new glue supply cylinder installed in another material seat, and makes the connecting pin connected to the valve body at the same height as the elastic gasket on the new glue supply cylinder. Then, the three-axis drive mechanism drives the valve body to approach the new glue supply cylinder and inserts the connecting pin through the elastic gasket on the new glue supply cylinder into the glue supply channel. At the same time, the second magnet installed on the valve body and the first magnet installed on the glue supply cylinder attract and fix it, realizing a quick connection between the valve body and the glue supply cylinder with good connection stability, thereby improving the stability of glue supply from the glue supply cylinder to the valve body and glue dispensing from the valve body.

[0070] Next, the air nozzle moves downward with the support frame and connects with the air inlet on the upper surface of the glue supply cylinder. Air is introduced into the glue supply cylinder through the air inlet to improve the flow of glue during the glue supply process to the valve body. Under the action of gas pressure, the glue in the glue supply cylinder flows towards the glue outlet channel. The ball in the conical through hole moves under the glue pressure and squeezes the spring, thereby forming a glue outlet gap between the ball and the inner wall of the conical through hole. This achieves rapid connection between the glue supply block on the new glue supply cylinder and the glue inlet block on the valve body, and the valve body restarts the glue dispensing operation.

[0071] When using the automatic part-changing mechanism of the above-mentioned dispensing machine, the movement of the three-axis mechanism can automatically place the old glue supply cylinder connected to the valve body into the receiving hole of the material seat and separate it from the valve body. Then, the valve body is connected to the new glue supply cylinder in another material seat, thereby realizing automatic and continuous operation of the dispensing process, improving dispensing efficiency. In addition, during the process of replacing the connecting pin of the glue supply cylinder connected to the valve body, it can quickly achieve rapid connection between the glue inlet block on the valve body and the glue flow channel inside the glue supply block on the new glue supply cylinder, and effectively avoid the valve body from being separated from the old glue supply cylinder. In case of residual glue overflowing from the old glue supply cartridge during cartridge separation, the flow channel in the glue inlet block on the valve body can be quickly shut off when the valve body is separated from the old glue supply cartridge. This not only prevents glue overflow from the glue inlet block, but also maintains the stability and consistency of the glue flow channel before and after replacing the glue supply cartridge, thereby ensuring consistent dispensing quality. In addition, while facilitating the disassembly and replacement of the glue supply cartridge connected to the valve body, it also enables a quick and stable connection between the valve body and the glue supply cartridge, thereby improving the stability of glue supply from the glue supply cartridge to the valve body and the dispensing of glue from the valve body.

[0072] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic part changing mechanism for a dispensing machine, used for dispensing a dispensing unit, the dispensing unit comprising: The system comprises a glue supply cylinder (21), a valve body (22) located on one side of the glue supply cylinder (21), and a glue inlet block (23) installed on the lower end face of the valve body (22). The glue inlet block (23) is provided with a glue inlet channel (231) and a glue outlet channel (232) that are interconnected. The component changing mechanism includes a three-axis drive mechanism installed on the machine base (15). The valve body (22) is installed on the three-axis drive mechanism. The glue supply cylinder (21) is connected to the side of the valve body (22) opposite to the three-axis drive mechanism. The system is characterized in that the machine base (15) is equipped with a three-axis drive mechanism. At least two material seats are installed for placing glue supply cylinders (21). The lower end of the glue supply cylinder (21) is connected to a glue supply block (1) with a glue supply channel (3) inside. A connecting block (2) with a connecting channel (4) inside is installed on the side end face of the glue inlet block (23) facing the glue supply block (1). The upper end of the vertical section (31) of the glue supply channel (3) is connected to the glue outlet (211) of the glue supply cylinder (21). The horizontal section (32) of the glue supply channel (3) extends towards the connecting block (2) from the end opposite to the vertical section (31). An elastic gasket (5) is sealed and installed on the glue supply block (1) and outside the horizontal section (32) of the glue supply channel (3). A mounting hole (6) communicating with the connecting channel (4) is opened on the side end face of the connecting block (2) facing the glue supply block (1). One end of a connecting pin (7) is embedded in the mounting hole (6), and a flow channel hole (10) is opened on the end face of the connecting pin (7) located inside the mounting hole (6). A transition flow channel (71) with an inner diameter smaller than the inner diameter of the flow channel hole (10) is opened between the other end of the connecting pin (7) and the flow channel hole (10). The transition flow channel (71) and the flow channel hole (10) are connected by a... The tapered through hole (11) is connected, and a nut (12) with a central through hole (121) is installed at one end of the flow channel hole (10) opposite to the transition flow channel (71). A spring (14) in a compressed state is horizontally arranged between the end face of the nut (12) and a ball (13) set in the tapered through hole (11), so that the ball (13) with a diameter greater than the inner diameter of the transition flow channel (71) can be pressed and contacted with the inner wall of the tapered through hole (11). When the end of the connecting pin (7) away from the mounting hole (6) passes through the elastic gasket (5), one end of the transition flow channel (71) is connected to the glue supply flow channel (3) on the glue supply block (1).

2. The automatic part changing mechanism of the dispensing machine according to claim 1, characterized in that: The upper surface of the material holder is provided with a receiving hole for the glue supply cylinder (21) to be inserted. The receiving hole is in communication with the side surface of the material holder facing the three-axis drive mechanism. A baffle is installed on the side of the material holder facing the three-axis drive mechanism and on both sides of the receiving hole. When the glue supply cylinder (21) is inserted into the receiving hole, the baffle is in blocking contact with the glue supply cylinder (21).

3. The automatic part changing mechanism of the dispensing machine according to claim 2, characterized in that: At least one of the material holders has a glue supply cylinder (21) embedded in its receiving hole, and at least one of the material holders does not have a glue supply cylinder (21) installed in its receiving hole.

4. The automatic part changing mechanism of the dispensing machine according to claim 1, characterized in that: The valve body (22) is mounted on the Z-axis drive unit of the three-axis drive mechanism via a support plate (33). A pressure cylinder (34) is mounted on the vertically arranged support plate (33) above the valve body (22). A support frame (35) is mounted on the piston rod of the pressure cylinder (34). The horizontal part (351) of the support frame (35), which can move in the vertical direction, extends to the top of the glue supply cylinder (21) connected to the valve body (22) and is equipped with an air nozzle (28). An air inlet (25) that cooperates with the air nozzle (28) is opened on the upper surface of the glue supply cylinder (21). When the support frame (35) moves to the lower position, the air nozzle (28) connects with the air inlet (25) on the glue supply cylinder (21).

5. The automatic part changing mechanism of the dispensing machine according to claim 4, characterized in that: An electrical connector (29) is installed on the upper surface of the valve body (22), and an electrical connector (30) that mates with the electrical connector (29) is installed on the horizontal part (351) of the support frame (35). When the support frame (35) moves to the lower position, the electrical connector (30) and the electrical connector (29) on the valve body (22) are electrically connected.

6. The automatic part changing mechanism of the dispensing machine according to claim 1, characterized in that: The glue supply cylinder (21) is embedded in a support base (261). A first magnet (271) is installed on the side of the support base (261) facing the valve body (22). A second magnet (272) that cooperates with the first magnet (271) is installed on the side of the fixing block (262) on the valve body (22) facing the support base (261). When the connecting needle (7) is inserted into the glue supply channel (3), the first magnet (271) and the second magnet (272) are attracted and fixed.

7. The automatic part changing mechanism of the dispensing machine according to claim 6, characterized in that: The first magnet (271) and the second magnet (272) are both strong magnets or both electromagnets.

8. The automatic part changing mechanism of the dispensing machine according to claim 6, characterized in that: The first magnet (271) and the second magnet (272) are respectively embedded in the receiving grooves (39) opened on the support base (261) and the fixing block (262).

9. The automatic part changing mechanism of the dispensing machine according to claim 1, characterized in that: The glue outlet (211) at the lower end of the glue supply cylinder (21) is connected to the glue supply channel (3) on the glue supply block (1) through a connecting nozzle (24).

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