A paster nozzle for SMT paster

Abstract

This utility model belongs to the field of SMT placement technology and discloses a placement nozzle for an SMT placement machine, including a mounting base, an angle positioning plate, a rigid air tube, a nozzle holder, a nozzle, and a spring. The mounting base is made of metal and is used to connect to the placement machine. The angle positioning plate has a positioning notch to indicate the nozzle direction to prevent incorrect installation. The rigid air tube passes through the angle positioning plate, with one end connected to an air hole and the other end connected to the nozzle holder with the nozzle. The spring is sleeved on the rigid air tube, with both ends abutting against the nozzle holder and the angle positioning plate, allowing the nozzle to move and preventing damage from excessive pressure. The mounting base has a movable cavity in which the anti-detachment clip on the rigid air tube is placed, and it works with the guide groove and guide block to achieve stable movement. The nozzle holder and the rigid air tube are connected by a locking block and a locking block through a structure, which facilitates disassembly and maintenance. This design can reduce impact damage to the nozzle, extend its service life, and is easy to disassemble and assemble, making it highly practical.

Description

Technical Field

[0001] This utility model relates to the field of SMT placement technology, specifically to a placement nozzle for an SMT placement machine. Background Technology

[0002] In the current era of rapid development in surface mount technology (SMT), pick-and-place machines, as core equipment in the electronics manufacturing industry chain, directly determine the assembly precision and production efficiency of electronic products through the performance of their actuators. Among them, ceramic nozzles have become the mainstream choice for pick-and-place machines to pick up micro-electronic components due to their excellent wear resistance, high temperature resistance, and surface finish. Especially in the placement of ultra-small components, the anti-static properties of ceramic materials (such as zirconium oxide and alumina) can effectively prevent electrostatic breakdown of components, while their excellent surface roughness can reduce frictional damage to components. Combined with the convenient cleaning properties of solvents such as alcohol (which can quickly remove solder paste residue), this further consolidates its application position in the field of precision manufacturing. However, the brittle nature of ceramic nozzles remains a key bottleneck limiting their lifespan. In actual production, pick-and-place machines need to complete a closed-loop action of pickup, positioning, and placement using nozzles: when the nozzle contacts the material, the vacuum system instantly generates negative pressure to ensure firm adhesion, while the Z-axis drive mechanism controls the nozzle to contact the material surface at a certain speed. During this process, minute positional deviations of the material (such as height differences caused by PCB board warping) and vibrations of the feeding mechanism will subject the nozzle to instantaneous impact forces, and ceramic materials have poor impact resistance. The cumulative effect of long-term, high-frequency impacts can cause microcracks to gradually form inside the ceramic nozzle. When these cracks expand to a critical size, the nozzle is highly susceptible to breakage upon material intake, especially when handling large components such as BGAs and QFPs. The uneven distribution of impact force due to the increased contact area significantly increases the probability of breakage. Traditional ceramic nozzles have a short lifespan and are difficult to maintain after damage. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a pick-and-place nozzle for SMT pick-and-place machines, which solves the problems mentioned in the background art, such as the short service life of ceramic nozzles and the difficulty of maintenance after damage.

[0004] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a pick-and-place nozzle for an SMT pick-and-place machine, comprising: Mounting base, the mounting base is made of metal, the mounting base is used to connect with the pick and place machine, and the mounting base has air holes that cooperate with the pick and place machine; An angle positioning plate is provided on the side of the mounting base away from the air hole, and a positioning notch is provided on the angle positioning plate; A rigid air tube is disposed within the mounting base, one end of which is connected to an air hole, and the rigid air tube passes through the angle positioning plate. A suction nozzle holder is disposed at the end of a rigid trachea away from the air vent, and a suction nozzle is disposed on the suction nozzle holder; A spring is sleeved on the rigid air tube, with one end of the spring abutting against the nozzle seat and the other end of the spring abutting against the angle positioning plate.

[0005] Preferably, a protective sleeve is provided on the side of the angle positioning disk near the nozzle seat, and the protective sleeve is sleeved on the outside of the spring.

[0006] Preferably, the mounting base is provided with a movable cavity, and the rigid air tube is provided with an anti-detachment clip, which is placed inside the movable cavity.

[0007] Preferably, the mounting base has a mating groove on one side near the angle positioning plate, and the angle positioning plate has a mating protrusion corresponding to the mating groove. The mating protrusion is engaged in the mating groove, and the mounting base and the angle positioning plate are fixedly connected by adhesive.

[0008] Preferably, the mounting base and the angle positioning plate are provided with a guide groove communicating with the movable cavity, and the rigid air pipe is provided with a guide block corresponding to the guide groove, and the guide block is slidably engaged in the guide groove.

[0009] Preferably, the end of the rigid air tube facing away from the mounting base is provided with a locking block, and the nozzle seat is provided with a locking block through hole corresponding to the locking block.

[0010] Preferably, the cross-sectional dimensions of the card block are exactly the same as those of the guide block, and the cross-sectional dimensions of the perforation in the card block are exactly the same as those of the guide groove.

[0011] Preferably, the suction nozzle seat has a locking block rotation arc groove on the side opposite to the angle positioning plate, one end of the locking block rotation arc groove is connected to the locking block through hole, and the other end of the locking block rotation arc groove is provided with a locking block slot.

[0012] Preferably, a stop is provided near the through hole of the card block in the rotating arc groove of the card block.

[0013] Compared with the prior art, the present invention provides a pick-and-place nozzle for an SMT pick-and-place machine, which has the following advantages: This SMT pick-and-place machine uses a pick-and-place nozzle with a mounting base, angle positioning plate, rigid air tube, nozzle holder, nozzle, and spring. This structure can prevent excessive pressure on the nozzle when picking up components, significantly improve the service life of the ceramic nozzle, and the whole device is easy to disassemble and assemble reliably. Damaged parts are easy to replace and maintain, making it convenient to use and highly practical. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the movable cavity structure of this utility model; Figure 3 This is a schematic diagram of the nozzle seat structure of this utility model; Figure 4 This is a cross-sectional view of the overall structure of this utility model.

[0015] In the diagram: 1. Mounting base; 2. Angle positioning plate; 3. Positioning notch; 4. Rigid air tube; 5. Nozzle seat; 6. Nozzle; 7. Spring; 8. Protective sleeve; 9. Movable cavity; 10. Anti-detachment clip; 11. Docking groove; 12. Docking protrusion ring; 13. Guide groove; 14. Guide block; 15. Locking block; 16. Locking block perforation; 17. Locking block rotation arc groove; 18. Locking block slot; 19. Stop block. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-4 This utility model provides a technical solution: A pick-and-place nozzle for an SMT pick-and-place machine, comprising: Mounting base 1 is made of metal and is used to connect with the pick-and-place machine. Mounting base 1 has air holes that cooperate with the pick-and-place machine. The air holes are used to conduct air pressure. During operation, the pick-and-place machine generates negative pressure, which is conducted to the nozzle 6 to pick up the electronic components to be picked up.

[0018] Angle positioning plate 2 is located on the side of the mounting base 1 away from the air hole. Angle positioning plate 2 has a positioning notch 3. The positioning notch 3 is used to quickly indicate the direction of the entire nozzle to avoid incorrect installation direction.

[0019] Rigid air tube 4 is installed in the mounting base 1. One end of the rigid air tube 4 is connected to the air hole, and the rigid air tube 4 passes through the angle positioning plate 2. The nozzle holder 5 is located at the end of the rigid air tube 4 away from the air hole, and the nozzle 6 is provided on the nozzle holder 5; the nozzle holder 5 and the nozzle 6 can be fixed with adhesive.

[0020] Spring 7 is fitted onto the rigid air tube 4. One end of spring 7 abuts against the nozzle seat 5, and the other end abuts against the angle positioning plate 2. Spring 7 allows the nozzle 6 to have a certain degree of mobility, and the entire nozzle seat 5 and nozzle 6 can move slightly toward the angle positioning plate 2 to prevent damage to the nozzle 6 in case of excessive pressure.

[0021] Furthermore, a protective sleeve 8 is provided on the side of the angle positioning disc 2 near the suction nozzle seat 5, and the protective sleeve 8 is sleeved on the outside of the spring 7. The protective sleeve 8 is used to cover and protect the spring 7.

[0022] Furthermore, the mounting base 1 is provided with a movable cavity 9, and the rigid air tube 4 is provided with an anti-detachment clip 10, which is placed inside the movable cavity 9. During the retraction movement, the entire rigid air tube 4, the nozzle seat 5, and the nozzle 6 move together toward the movable cavity 9 to prevent excessive pressure from damaging the nozzle 6. After the electronic components are completely picked up, the nozzle 6 loses pressure. At this time, under the action of the spring 7, the entire rigid air tube 4, the nozzle seat 5, and the nozzle 6 move in the direction away from the movable cavity 9 to reset.

[0023] Furthermore, a mating groove 11 is provided on one side of the mounting base 1 near the angle positioning plate 2. A mating protrusion 12 corresponding to the mating groove 11 is provided on the angle positioning plate 2. The mating protrusion 12 is engaged within the mating groove 11. The mounting base 1 and the angle positioning plate 2 are fixedly connected by adhesive. The mating groove 11 and the mating protrusion 12 are used to improve the tightness of the connection. After the mounting base 1 and the angle positioning plate 2 are connected, there are small gaps between them and the rigid air tube 4. Although these small gaps are not airtight, the negative pressure suction of the air source is strong enough and does not affect use.

[0024] Furthermore, the mounting base 1 and the angle positioning plate 2 are provided with a guide groove 13 that communicates with the movable cavity 9, and the rigid air pipe 4 is provided with a guide block 14 corresponding to the guide groove 13, and the guide block 14 is slidably engaged in the guide groove 13.

[0025] Furthermore, a locking block 15 is provided at the end of the rigid air tube 4 facing away from the mounting base 1, and a locking block perforation 16 corresponding to the locking block 15 is provided on the nozzle base 5.

[0026] Furthermore, the cross-sectional dimensions of the locking block 15 are exactly the same as those of the guide block 14, and the cross-sectional dimensions of the locking block through hole 16 are exactly the same as those of the guide groove 13. It is recommended that the mounting base 1 adopt a split process, so that the locking block 15 can pass through the guide groove 13, and the entire rigid air tube 4 can be dislodged towards one side of the mounting base 1, thereby realizing the separation of the mounting base 1, the angle positioning plate 2, and the rigid air tube 4.

[0027] Furthermore, the suction nozzle seat 5 has a locking block rotation arc groove 17 on the side opposite to the angle positioning plate 2. One end of the locking block rotation arc groove 17 is connected to the locking block through hole 16, and the other end of the locking block rotation arc groove 17 is provided with a locking block slot 18. When the locking block 15 passes through the locking block through hole 16, the entire rigid air tube 4 can be rotated to lock the locking block 15 in the locking block slot 18.

[0028] Furthermore, a stop 19 is provided near the through hole 16 of the card block in the rotating arc groove 17. The stop 19 is used to sense the position of the through hole 16 of the card block and to prevent damage from excessive rotation angle during disassembly.

[0029] Structural Description: Mounting base 1: A basic connection structure made of metal, used to connect with the pick and place machine. It has air holes that cooperate with the pick and place machine to conduct negative pressure, while accommodating the rigid air tube 4 and setting up a movable cavity 9 to provide installation support for the whole device. Angle positioning plate 2: A positioning structure set on the side of the mounting base 1 away from the air hole. It is provided with a positioning notch 3 and a docking protrusion ring 12. A protective sleeve 8 is also provided on the side near the nozzle seat 5. It is used to assist in the positioning of the nozzle direction, connect with the mounting base 1, and install the protective sleeve 8. Positioning notch 3: A marking structure on the angle positioning plate 2, used to quickly indicate the installation direction of the entire nozzle, avoiding misalignment due to incorrect installation direction; Rigid air tube 4: a hollow tubular structure that runs through the mounting base 1 and the angle positioning plate 2. One end is connected to the air hole of the mounting base 1 and the other end is connected to the nozzle seat 5. It is equipped with an anti-detachment clip 10, a guide block 14 and a locking block 15, which are used to transmit negative pressure and drive the nozzle seat 5 and the nozzle 6 to move. Suction nozzle seat 5: An installation structure located at the end of the rigid air tube 4 away from the air hole, on which the suction nozzle 6 is installed. It is also provided with a locking block through hole 16, a locking block rotating arc groove 17, a locking block slot 18 and a stop block 19, for installing the suction nozzle 6 and achieving a detachable connection with the rigid air tube 4. Suction nozzle 6: An actuator installed on the suction nozzle base 5. It uses negative pressure transmitted through the rigid air tube 4 to pick up electronic components. It is made of ceramic material and has easy-to-clean and anti-static properties. It is cushioned by spring 7 to avoid impact damage. Spring 7: An elastic buffer structure fitted on the rigid air tube 4, with one end abutting against the nozzle seat 5 and the other end abutting against the angle positioning plate 2, so that the nozzle 6 has mobility, which can convert the rigid impact of the nozzle 6 when it comes into contact with the material into elastic potential energy, and prevent the nozzle 6 from being damaged due to excessive pressure. Protective sleeve 8: A protective structure located on the side of the angle positioning plate 2 near the nozzle seat 5, sleeved on the outside of the spring 7, used to cover and protect the spring 7, and prevent the spring 7 from interfering with external components and dust and impurities from entering. Movable cavity 9: A cavity structure opened in the mounting base 1 to accommodate the anti-detachment clip 10 on the rigid air tube 4, providing space for the retraction and movement of the rigid air tube 4, the nozzle seat 5 and the nozzle 6, while cooperating with the anti-detachment clip 10 to limit the movement of the components; Anti-detachment clip 10: A limiting structure set on the rigid air tube 4 and placed in the movable cavity 9. When the rigid air tube 4 moves, it slides along the movable cavity 9 to prevent the rigid air tube 4 from excessively detaching from the mounting base 1, and at the same time, the auxiliary components are reset. The mating groove 11 is a connection structure opened on the side of the mounting base 1 near the angle positioning disk 2. It engages with the mating protrusion 12 on the angle positioning disk 2 to improve the tightness of the connection between the mounting base 1 and the angle positioning disk 2. Docking protrusion ring 12: A protrusion structure set on the angle positioning plate 2, which is snapped into the docking groove 11 of the mounting base 1. With the help of adhesive, the mounting base 1 and the angle positioning plate 2 are fixedly connected, enhancing the connection stability between the two. Guide groove 13: A groove-shaped structure formed in the mounting base 1 and the angle positioning plate 2 and connected to the movable cavity 9. It is slidably engaged with the guide block 14 on the rigid air tube 4 to provide a stable trajectory for the contraction and repositioning movement of the rigid air tube 4 and prevent movement deviation. Guide block 14: A guide structure set on the rigid air tube 4, which is slidably engaged in the guide groove 13. It works with the guide groove 13 to ensure that the rigid air tube 4, the mouthpiece seat 5 and the mouthpiece 6 do not deviate when they move, thus ensuring the stability of the movement. Locking block 15: A locking structure set at the end of the rigid air tube 4 away from the mounting base 1. Its cross-sectional dimensions are the same as those of the guide block 14. It can pass through the locking block through hole 16 of the nozzle seat 5 and rotate to lock into the locking block slot 18, so as to realize the connection and separation of the rigid air tube 4 and the nozzle seat 5. 16: A hole-like structure formed on the nozzle seat 5, with the same cross-sectional dimensions as the guide groove 13, through which the locking block 15 of the rigid air tube 4 passes, providing a channel for the connection between the rigid air tube 4 and the nozzle seat 5. The rotating arc groove 17 of the locking block is an arc-shaped groove on the side of the nozzle seat 5 away from the angle positioning plate 2. One end is connected to the locking block through hole 16 and the other end is connected to the locking block slot 18, so that the locking block 15 can rotate and assist in the assembly and disassembly of the rigid air tube 4 and the nozzle seat 5. Card slot 18: A groove-shaped structure located at the other end of the card rotation arc groove 17, used to lock the rotated card 15, so that the rigid air tube 4 and the nozzle seat 5 are fixedly connected. Stop 19: A limiting structure set at the junction of the rotating arc groove 17 of the block and the through hole 16 of the block, used to limit the rotation angle of the block 15, avoid damage to the parts due to excessive operation, and at the same time assist in sensing the position of the through hole 16 of the block.

[0030] Working Principle: When the device is docked with the pick-and-place machine, the mounting base 1 forms a rigid connection with the machine through its metal body, and the air vents on it become the starting point for air pressure conduction. During operation, the negative pressure generated by the pick-and-place machine enters the device through the air vents and is continuously conducted to the nozzle 6 through the hollow channel of the rigid air tube 4, creating a stable suction force field at the end of the nozzle 6, providing the basic power for picking up electronic components. The positioning notch 3 on the angle positioning plate 2 plays a crucial role at this stage. By matching the corresponding structure of the pick-and-place machine, it ensures that the installation direction of the entire device is accurate and avoids misalignment caused by angle deviation.

[0031] When the suction nozzle 6 contacts the material, if an instantaneous impact force is generated due to material position deviation or vibration of the feeding mechanism, the suction nozzle seat 5 will drive the rigid air tube 4 to retract towards the angle positioning plate 2. At this time, the spring 7 sleeved on the rigid air tube 4 is compressed, converting the rigid impact into elastic potential energy, significantly reducing the instantaneous pressure on the suction nozzle 6. At the same time, the guide block 14 on the rigid air tube 4 slides along the guide groove 13 in the mounting base 1 and the angle positioning plate 2, providing a stable trajectory for the retraction movement and avoiding stress concentration caused by deviation. The protective sleeve 8 wraps around the spring 7 during this process to prevent it from interfering with external components, while also blocking dust and other impurities from entering.

[0032] After the suction nozzle 6 completes the component pickup, the spring 7 releases its stored elastic potential energy, pushing the suction nozzle seat 5 and the rigid air tube 4 to move in opposite directions along the guide groove 13, thus resetting the entire mechanism to its initial state. During this process, the anti-detachment clip 10 on the rigid air tube 4 slides within the movable cavity 9, providing a limit to the movement and preventing the rigid air tube 4 from excessively detaching from the mounting base 1.

[0033] When the nozzle 6 needs to be replaced, manually move the nozzle seat 5 and rigid air tube 4 to disengage the locking block 15 from the locking block slot 18 of the nozzle seat 5. The block then rotates through the locking block rotation arc groove 17 to the locking block through hole 16, thus separating the nozzle seat 5 from the rigid air tube 4. The stop block 19 limits the rotation angle of the locking block 15 during this process to prevent damage to components from excessive operation. If complete disassembly is required, since the locking block 15 and guide block 14 have the same cross-sectional dimensions, and the locking block through hole 16 matches the cross-sectional dimensions of the guide groove 13, the rigid air tube 4 can be completely pulled out along the guide groove 13, separating the mounting base 1, angle positioning plate 2, and rigid air tube 4, facilitating individual inspection or replacement of each component.

[0034] This design, through the optimization of the air pressure transmission path and the combination of a mechanical buffer structure, retains the advantages of the ceramic nozzle 6, such as easy cleaning and anti-static properties, while significantly reducing the risk of nozzle 6 breaking due to impact through the elastic cushioning of the spring 7. At the same time, the modular connection method ensures convenient maintenance of the device during long-term use, allowing for the replacement of components without complex tools, effectively improving the overall efficiency of the equipment.

[0035] 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 paster nozzle for an SMT paster, characterized in that include: Mounting base (1), the mounting base (1) is made of metal, the mounting base (1) is used to connect with the pick and place machine, and the mounting base (1) is provided with air holes that cooperate with the pick and place machine; Angle positioning plate (2) is provided on the side of the mounting base (1) away from the air hole, and a positioning notch (3) is provided on the angle positioning plate (2). Rigid air tube (4), the rigid air tube (4) is disposed in the mounting base (1), one end of the rigid air tube (4) is connected to the air hole, and the rigid air tube (4) passes through the angle positioning plate (2). A suction nozzle seat (5) is provided on the end of the rigid air tube (4) away from the air hole, and a suction nozzle (6) is provided on the suction nozzle seat (5). Spring (7), the spring (7) is sleeved on the rigid air tube (4), one end of the spring (7) abuts against the nozzle seat (5), and the other end of the spring (7) abuts against the angle positioning plate (2).

2. The paster nozzle for SMT paster according to claim 1, characterized in that, The angle positioning plate (2) is provided with a protective sleeve (8) on the side near the suction nozzle seat (5), and the protective sleeve (8) is sleeved on the outside of the spring (7).

3. The paster nozzle for SMT paster machine according to claim 1, characterized in that, The mounting base (1) is provided with a movable cavity (9), and the rigid air tube (4) is provided with an anti-detachment clip (10), and the anti-detachment clip (10) is placed in the movable cavity (9).

4. The paster nozzle for SMT paster according to claim 3, characterized in that, The mounting base (1) is provided with a docking groove (11) on one side near the angle positioning disk (2). The angle positioning disk (2) is provided with a docking protrusion (12) corresponding to the docking groove (11). The docking protrusion (12) is snapped into the docking groove (11). The mounting base (1) and the angle positioning disk (2) are fixedly connected by adhesive.

5. The paster nozzle for SMT paster machine according to claim 4, characterized in that, The mounting base (1) and the angle positioning plate (2) are provided with a guide groove (13) that communicates with the movable cavity (9). The rigid air pipe (4) is provided with a guide block (14) corresponding to the guide groove (13). The guide block (14) is slidably engaged in the guide groove (13).

6. The paster nozzle for SMT paster according to claim 5, characterized in that, The rigid air tube (4) is provided with a locking block (15) at the end away from the mounting base (1), and the suction nozzle base (5) is provided with a locking block through hole (16) corresponding to the locking block (15).

7. The paster nozzle for SMT paster according to claim 6, characterized in that, The cross-sectional dimensions of the card block (15) are exactly the same as those of the guide block (14), and the cross-sectional dimensions of the card block through hole (16) are exactly the same as those of the guide groove (13).

8. The paster nozzle for SMT paster machine according to claim 6, characterized in that, The suction nozzle seat (5) is provided with a block rotation arc groove (17) on the side away from the angle positioning disk (2). One end of the block rotation arc groove (17) is connected to the block through hole (16), and the other end of the block rotation arc groove (17) is provided with a block slot (18).

9. A pick-and-place nozzle for an SMT pick-and-place machine according to claim 8, characterized in that, A stop (19) is provided near the card block through hole (16) of the card block rotation arc groove (17).

Images