Improved PCB vacuum package sealing device

Abstract

The utility model provides an improved PCB (printed circuit board) vacuum package sealing device, which is technically characterized by comprising a bag pulling device, a left clamping jaw mechanism, a right clamping jaw mechanism, two servo linear motion mechanisms, a driving device, a driving device and a control device, the sensors transversely move along with the left clamping jaw mechanism and the right clamping jaw mechanism respectively and are used for detecting the edge position of the sealing bag; the final position of the left and right clamping jaw mechanisms moving towards the middle is controlled by a sensor, and the final position of the left and right clamping jaw mechanisms moving towards the outer side is controlled by the torque value of the servo linear motion mechanism; and the bag pressing device is used for pressing the bag opening of the sealing bag before and after the bag pulling action of the bag pulling device, and the bag pressing device is arranged on the rear side of the sealing device in parallel. According to the packaging and sealing device, clamping failure caused by tilting of the edges of the two sides of the bag opening can be avoided, the flatness and sealing performance of the bag opening of the sealing bag before heat sealing can be guaranteed, and poor sealing caused by bending and folding of the bag opening of the sealing bag is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB vacuum packaging equipment, in particular to a PCB vacuum packaging sealing device. Background Art

[0002] PCBs without electronic components need to be treated with moisture-proof treatment after production to prevent moisture from getting into the PCB during storage, which may affect the impedance value, cause short circuit or open circuit failure, and lead to unstable quality of electronic products. One existing practice is to put PCBs stacked to a certain thickness into aluminum-plastic sealed bags, and then perform vacuum heat-sealing packaging to remove moisture and air in the sealed bags, and put in desiccant and test paper to keep the bag dry and intuitively understand the humidity in the bag when it is opened for use.

[0003] The Chinese utility model patent with the authorization announcement number CN218967290U discloses a PCB vacuum packaging device, wherein the bag clamping assembly 12 includes two groups of clamping assemblies 121 for clamping the two sides of the bag opening, respectively, a bag clamping linear module 122 for driving the clamping assembly 121 on one side to move to the other side, and a bag pulling cylinder 123 for driving the clamping assembly 121 on the side to retreat to flatten the bag opening. The working principle of the bag clamping assembly is: one clamping assembly is fixed in position, and the other clamping assembly reciprocates to flatten the bag opening. However, in the actual use of the device, it was found that since the aluminum-plastic sealing bag has a certain toughness, after being stretched open by the stacked PCBs, its bag opening is easily deformed and curved in a wavy shape when closed. This bending is not only prone to misalignment between the bag opening edge and the clamping assembly, resulting in unsuccessful clamping, but also the clamping assembly on one side of the fixed position will deviate from the clamping position of the bag opening edge due to the bending of the bag opening, thereby causing the bag opening to be uneven, and then the bag opening is folded during heat sealing, resulting in poor sealing.

[0004] In addition, the existing test paper for testing humidity is placed on the top surface of the PCB and is placed in a sealed bag together with the PCB. However, after the sealing bag is evacuated, the test paper will adhere to the surface of the PCB and leave an indentation. When the test paper is subsequently installed, not only is the remaining space in the sealing bag small, but also due to air flow disturbance during vacuuming, it is difficult to ensure the accurate placement of the test paper in the small space, so that the test paper may contact the sealing line of the sealing bag, resulting in poor sealing. Utility Model Content

[0005] The utility model aims to provide a PCB vacuum packaging sealing device which can improve the sealing yield of the sealing bag.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] An improved PCB vacuum packaging sealing device is used for vacuum sealing a sealed bag containing stacked PCBs, comprising a supporting mechanism for supporting and positioning the sealed bag containing the PCBs and making the bag opening face forward; a sealing device for heat-sealing the bag opening corresponding to the sealing line, comprising an upper sealing mechanism and a lower sealing mechanism which are arranged relatively to each other and can be lifted and lowered respectively; a bag opening device for opening the bag opening of the sealed bag by vacuum adsorption, the bag opening device is arranged on the front side of the sealing device, comprising an upper suction mechanism and a lower suction mechanism which are arranged relatively to each other and can be lifted and lowered respectively; a bag pulling device for clamping the edge of the bag opening of the sealed bag from the left and right sides and flattening it, comprising two left and right groups of clamping jaw mechanisms, two groups of servo linear motion mechanisms which respectively control the lateral movement of the left and right clamping jaw mechanisms, and two groups of servo linear motion mechanisms which respectively move laterally with the left and right clamping jaw mechanisms. A sensor for detecting the edge position of the sealed bag; the terminal position of the left and right clamping mechanisms moving toward the middle is controlled by the sensor, while the terminal position of the movement toward the outside is controlled by the torque value of the servo linear motion mechanism; a bag pressing device, used to press the bag opening of the sealed bag before and after the bag pulling device pulls the bag, respectively, the bag pressing device is arranged in parallel on the rear side of the sealing device, including an upper pressing mechanism and a lower pressing mechanism that are relatively arranged up and down and can be raised and lowered respectively; the contact surface between the upper pressing mechanism and / or the lower pressing mechanism and the sealed bag has a flexible strip; and a vacuuming device, used to vacuum the sealed bag, including a flat vacuum nozzle, and a first linear motion mechanism that drives the vacuum nozzle in and out of the bag opening of the sealed bag, after entering the sealed bag, the end of the vacuum nozzle is flush with or exceeds the rear edge of the bag pressing device.

[0008] Its working principle is: the supporting mechanism supports and positions the sealed bag containing PCB so that the bag opening faces the side of the sealing device, the bag opening is opened by the bag opening device, and the flat vacuum nozzle is inserted into the bag opening, and the bag pressing device presses the bag opening, while the bag pulling device moves from both sides to the edge positions of the sealed bag respectively. After the edge of the sealed bag is detected by the sensor, the clamping claw mechanism clamps the edge of the bag opening, and then the bag pressing device releases the bag opening, while the bag pulling device tightens the bag opening to both sides until the servo linear motion mechanism stops when the set torque value is reached, and the bag pressing device presses the bag opening again, and the vacuum device starts to vacuum the sealed bag. When the vacuum is completed and the vacuum nozzle is pulled out, the sealing device presses the sealed bag for heat sealing.

[0009] In a preferred embodiment, the lower sealing mechanism, the lower pressing mechanism, and the lifting and lowering of the bag pulling device are driven as a whole by a second linear motion mechanism.

[0010] A preferred solution, the second linear motion mechanism includes a U-shaped mounting bracket, vertical slide rail pairs at both ends are installed on the mounting vertical plate between the two side plates of the mounting bracket, and a driving cylinder installed on the bottom plate of the mounting bracket for driving the mounting vertical plate to rise and fall; the lower sealing mechanism and the lower pressing mechanism are both arranged on the top surface of the mounting vertical plate, and the lower suction mechanism is installed on the front side surface of the mounting vertical plate.

[0011] In a preferred embodiment, the servo linear motion mechanism of the bag pulling device is laterally installed on the mounting plate, and each group of the clamping jaws includes two groups of clamping jaws respectively arranged on the rear side of the pressing mechanism and the front side of the lower sealing mechanism; each group of the clamping jaws includes upper and lower clamping blocks corresponding to each other, and a clamping cylinder for driving the clamping jaws to open and close.

[0012] A preferred solution also includes a test paper placing device for placing the test paper into a sealed bag, including a suction nozzle assembly with a flat section for adsorbing the test paper, and a third linear motion mechanism for driving the flat section of the suction nozzle assembly to enter and exit the sealed bag; after the suction nozzle assembly sends the test paper into the sealed bag, the test paper is located between the PCB and the sealing line of the bag opening, and a part of the test paper corresponds to the bag pressing device, and the suction nozzle assembly is located outside the bag pressing device.

[0013] The beneficial effects of the utility model are as follows: firstly, before the bag pulling device pulls the bag, the bag opening is flattened by the bag pressing device, so that the edges on both sides of the bag opening can be prevented from curling up and failing to align with the clamping mechanism, resulting in clamping failure; secondly, the clamping mechanisms on both sides are enabled to accurately find the edge of the sealed bag and clamp it through the sensor, so that the position deviation of the edge of the bag opening clamped by the clamping mechanism can be avoided; then, the bag pressing device is released, and the bag opening is flattened outwardly by the clamping mechanism. Since the force of flattening outwardly is controlled by the torque value of the servo linear motion mechanism, not only can the bag opening be fully flattened, but also no adjustment is required when it is used to flatten sealed bags of different sizes; finally, the bag pressing device is used to press the bag opening again, so that the flatness and sealing of the bag opening of the sealed bag before heat sealing can be guaranteed, and poor sealing caused by bending and folding of the bag opening of the sealed bag can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 Schematic diagram of the overall structure of the vacuum packaging sealing device in the embodiment;

[0016] Figure 2 This is a schematic diagram of the installation structure of the upper part of the sealing device in the embodiment;

[0017] Figure 3 This is a schematic diagram of the installation structure of the lower part of the sealing device in the embodiment;

[0018] Figure 4 This is a schematic diagram of the partial structure of the lower part of the sealing device in the embodiment;

[0019] Figure 5 It is a schematic diagram of the structure of the vacuum pumping device and the test paper placing device in the embodiment. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] refer to Figures 1 to 5 , an improved PCB vacuum packaging sealing device, used for vacuum sealing a sealed bag containing stacked PCBs, comprising a supporting mechanism 1, used for supporting and positioning the sealed bag containing the PCBs, and making the bag opening face forward; a sealing device 2, used for heat-sealing the sealed bag opening corresponding to the sealing line, comprising an upper sealing mechanism 21 and a lower sealing mechanism 22 which are arranged relatively to each other and can be lifted and lowered respectively; a bag opening device 3, used for opening the sealed bag opening by vacuum adsorption, the bag opening device 3 is arranged on the front side of the sealing device 2, comprising an upper suction mechanism 31 and a lower suction mechanism 32 which are arranged relatively to each other and can be lifted and lowered respectively; a bag pulling device 4, used for clamping the edge of the sealed bag opening from the left and right sides and flattening it, comprising two left and right groups of clamping jaw mechanisms 41, two groups of servo linear motion mechanisms 42 which respectively control the lateral movement of the left and right clamping jaw mechanisms 41, and two groups of servo linear motion mechanisms 42 which respectively move laterally with the left and right clamping jaw mechanisms 41. A sensor for detecting the edge position of the sealed bag; the terminal position of the left and right clamping jaw mechanisms 41 moving toward the middle is controlled by the sensor, while the terminal position of the movement toward the outside is controlled by the torque value of the servo linear motion mechanism 42; a bag pressing device 5, used to press the bag opening of the sealed bag before and after the bag pulling action of the bag pulling device 4, the bag pressing device 5 is arranged in parallel on the rear side of the sealing device 2, including an upper pressing mechanism 51 and a lower pressing mechanism 52 which are arranged relatively to each other and can be lifted and lowered respectively; the contact surface between the upper pressing mechanism 51 and / or the lower pressing mechanism 52 and the sealed bag has a flexible strip; and a vacuuming device 6, used to vacuum the sealed bag, including a flat vacuum nozzle 61, and a first linear motion mechanism 62 for driving the vacuum nozzle 61 in and out of the bag opening of the sealed bag, after entering the sealed bag, the end of the vacuum nozzle 61 is flush with or exceeds the rear edge of the bag pressing device 5.

[0022] Among them, the supporting mechanism 1 can fix the sealed bag containing PCB by lifting, clamping left and right, clamping up and down, etc., and its mechanical structure can be realized by using existing technology according to actual needs. The sealing device 2 is a conventional structure in this field, and its upper sealing mechanism 21 and lower sealing mechanism 22 both include a strip-shaped heat sealing head, and a linear lifting mechanism that drives the heat sealing head to rise and fall back and forth, preferably driven by a cylinder. The bag opening device 3 is a conventional structure in this field, and its upper suction mechanism 31 and lower suction mechanism 32 both include a vacuum negative pressure suction nozzle group, and a linear lifting mechanism that drives it to rise and fall back and forth, preferably driven by a cylinder. The upper pressing mechanism 51 and the lower pressing mechanism 52 of the bag pressing device 5 can both include a strip-shaped pressing plate, and a linear lifting mechanism that drives the pressing plate to rise and fall back and forth, preferably driven by a cylinder; the flexible strip is fixed on the side of the pressing plate in contact with the sealed bag, and the flexible strip can be deformed, so when the vacuum nozzle 61 is clamped by the bag pressing device 5 to evacuate, the edge of the vacuum nozzle 61 will not leak. In the vacuum pumping device 6, the first linear motion mechanism 62 can be implemented using existing technology as needed, and is preferably a slide cylinder.

[0023] Its working principle is: the supporting mechanism 1 supports and positions the sealed bag containing PCB so that the bag opening faces the side of the sealing device 2, the bag opening is opened by the bag opening device 3, the flat air suction nozzle 61 is inserted into the bag opening, the bag pressing device 5 presses the bag opening, and the bag pulling device 4 moves from both sides to the edge positions of the sealed bag respectively, after the edge of the sealed bag is detected by the sensor, the clamping claw mechanism 41 clamps the edge of the bag opening, and then the bag pressing device 5 releases the bag opening, and the bag pulling device 4 tightens the bag opening to both sides until the servo linear motion mechanism 42 stops when the set torque value is reached, the bag pressing device 5 presses the bag opening again, and the vacuum device 6 starts to vacuum the sealed bag, and when the vacuum is completed and the air suction nozzle 61 is pulled out, the sealing device 2 presses the sealed bag for heat sealing.

[0024] Firstly, before the bag pulling device 4 pulls the bag, the bag opening is flattened by the bag pressing device 5, which can prevent the edges on both sides of the bag opening from curling up and failing to align with the clamping mechanism 41, resulting in clamping failure; secondly, the clamping mechanisms 41 on both sides are enabled to accurately find the edge of the sealed bag and clamp it through the sensor, which can prevent the position deviation of the edge of the bag opening clamped by the clamping mechanism 41; then, the bag pressing device 5 is released, and the bag opening is flattened outward by the clamping mechanism 41. Since the force of flattening outward is controlled by the torque value of the servo linear motion mechanism 42, not only can the bag opening be fully flattened, but also no adjustment is required when it is used to flatten sealed bags of different sizes; finally, the bag pressing device 5 is used to press the bag opening again, so as to ensure the flatness and sealing of the sealed bag opening before heat sealing, and avoid poor sealing of the sealed bag opening due to bending and folding.

[0025] In this embodiment, the lower sealing mechanism 22, the lower pressing mechanism 52, and the lifting and lowering of the bag pulling device 4 are driven as a whole by the second linear motion mechanism 7. Integrating the lower sealing mechanism 22, the lower pressing mechanism 52, and the lifting and lowering of the bag pulling device 4 into the overall drive of the second linear motion mechanism 7 can not only simplify the structure, but also ensure that the working surfaces of the above structures remain on the same plane, ensuring the accuracy of the coordinated work of each part during sealing. The second linear motion mechanism 7 can be implemented using existing technology as needed, preferably driven by a cylinder.

[0026] In this embodiment, the second linear motion mechanism 7 includes a U-shaped mounting bracket 71, a pair of vertical slide rails 72 at both ends mounted on a mounting plate 73 between two side plates of the mounting bracket 71, and a driving cylinder 74 mounted on the bottom plate of the mounting bracket 71 for driving the mounting plate 73 to rise and fall; the lower sealing mechanism 22 and the lower pressing mechanism 52 are both arranged on the top surface of the mounting plate 73, and the lower suction mechanism 32 is mounted on the front side of the mounting plate 73. The lower suction mechanism 32 is integrally mounted on the mounting plate 73 of the second linear motion mechanism 7, and can be raised and lowered as a whole with the lower sealing mechanism 22, the lower pressing mechanism 52, and the bag pulling device 4 to approach the sealed bag, and can also be raised and lowered alone to open the bag mouth. Among them, the independent lifting of the lower suction mechanism 32 can be driven by the cylinder 321; the lower suction mechanism 32 is integrally mounted on the mounting plate 73, which can reduce the stroke requirement of the cylinder drive for bag opening.

[0027] In this embodiment, the servo linear motion mechanism 42 of the bag pulling device 4 is installed on the mounting vertical plate 73 in the horizontal direction, and each group of the clamping claw mechanism 41 includes two groups of clamping claws 411 respectively arranged at the rear side of the pressing mechanism 52 and the front side of the lower sealing mechanism 22; each group of the clamping claws 411 includes an upper clamping block 411a and a lower clamping block 411b corresponding to each other, and a clamping cylinder 411c driving the clamping claws 411 to open and close. The front and rear groups of clamping claws 411 are used on one side to clamp the bag opening of the sealed bag and a section corresponding to the bag pressing device 5 and the sealing device 2, so as to ensure the flatness of the bag opening during sealing. The specific structure of the clamping claws 411 can be realized by existing technology and will not be described in detail.

[0028] In this embodiment, a test paper placing device 8 is also included, which is used to place the test paper into the sealed bag, including a suction nozzle assembly 81 with a flat section for adsorbing the test paper, and a third linear motion mechanism 82 for driving the flat section of the suction nozzle assembly 81 to enter and exit the sealed bag; after the suction nozzle assembly 81 sends the test paper into the sealed bag, the test paper is located between the PCB and the sealing line of the bag opening, and a part of the test paper corresponds to the bag pressing device 5, and the suction nozzle assembly 81 is located outside the bag pressing device 5. During operation, the suction nozzle assembly 81 adsorbs the test paper, and is inserted into the bag opening together with the suction nozzle 61 of the vacuum device 6, and corresponds to the position between the PCB and the sealing line. The length direction of the test paper is usually placed parallel to the sealing line to fit the space in the bag. The bag pressing device 5 can press and fix the test paper. During the vacuuming process, the suction nozzle assembly 81 can be pulled out of the bag opening to reset, and the test paper will not move again. After the vacuuming and heat sealing is completed, the test paper is clamped by the sealed bag, and its position no longer changes. Therefore, it will neither contact the PCB to cause indentation, nor move to the sealing line to cause poor sealing. The third linear motion mechanism 82 can be implemented using existing technology as needed, and is preferably a servo linear module.

[0029] The above description does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An improved PCB vacuum packaging sealing device, used for vacuum sealing a sealed bag containing stacked PCBs, characterized in that: include A supporting mechanism, used for supporting and positioning the sealed bag containing the PCB, and making the bag opening face forward; A sealing device, used for heat-sealing the bag opening corresponding to the sealing line, comprising an upper sealing mechanism and a lower sealing mechanism which are arranged opposite to each other and can be raised and lowered respectively; A bag opening device, used for opening the mouth of the sealed bag by vacuum adsorption, the bag opening device is arranged in front of the sealing device, and comprises an upper suction mechanism and a lower suction mechanism which are arranged opposite to each other and can be raised and lowered respectively; A bag pulling device, used for clamping the edges of the bag mouth of the sealed bag from the left and right sides and pulling them flat, comprising two groups of left and right clamping jaw mechanisms, two groups of servo linear motion mechanisms for respectively controlling the lateral movement of the left and right clamping jaw mechanisms, and two groups of sensors for detecting the edge positions of the sealed bag that respectively move laterally with the left and right clamping jaw mechanisms; the terminal positions of the left and right clamping jaw mechanisms moving toward the middle are controlled by the sensors, while the terminal positions of the left and right clamping jaw mechanisms moving toward the outside are controlled by the torque value of the servo linear motion mechanism; A bag pressing device, used for respectively pressing the bag opening of the sealed bag before and after the bag pulling device pulls the bag, the bag pressing device is arranged in parallel at the rear side of the sealing device, and comprises an upper pressing mechanism and a lower pressing mechanism which are arranged opposite to each other and can be raised and lowered respectively; the contact surface between the upper pressing mechanism and / or the lower pressing mechanism and the sealed bag has a flexible strip; And a vacuum device for vacuuming the sealed bag, comprising a flat vacuum nozzle and a first linear motion mechanism for driving the vacuum nozzle in and out of the bag opening of the sealed bag. After entering the sealed bag, the end of the vacuum nozzle is flush with or exceeds the rear edge of the bag pressing device.

2. The improved PCB vacuum packaging sealing device according to claim 1, characterized in that: The lower sealing mechanism, the lower pressing mechanism, and the lifting and lowering of the bag pulling device are integrally driven by the second linear motion mechanism.

3. The improved PCB vacuum packaging sealing device according to claim 2, characterized in that: The second linear motion mechanism includes a U-shaped mounting bracket, both ends of which are mounted on the mounting vertical plate between the two side plates of the mounting bracket through vertical slide rail pairs, and a driving cylinder mounted on the bottom plate of the mounting bracket for driving the mounting vertical plate to rise and fall; the lower sealing mechanism and the lower pressing mechanism are both arranged on the top surface of the mounting vertical plate, and the lower suction mechanism is installed on the front side surface of the mounting vertical plate.

4. The improved PCB vacuum packaging sealing device according to claim 3, characterized in that: The servo linear motion mechanism of the bag pulling device is laterally installed on the mounting plate, and each group of the clamping jaws mechanism includes two groups of clamping jaws respectively arranged on the rear side of the pressing mechanism and the front side of the lower sealing mechanism; each group of the clamping jaws includes upper and lower clamping blocks corresponding to the upper and lower parts, and a clamping cylinder for driving the clamping jaws to open and close.

5. The improved PCB vacuum packaging sealing device according to claim 1, characterized in that: It also includes a test paper placing device for placing the test paper into the sealed bag, including a nozzle assembly with a flat section for adsorbing the test paper, and a third linear motion mechanism for driving the flat section of the nozzle assembly to enter and exit the sealed bag; After the nozzle assembly sends the test paper into the sealed bag, the test paper is located between the PCB and the sealing line of the bag opening, and a part of the test paper corresponds to the bag pressing device, while the nozzle assembly is located outside the bag pressing device.

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