Vacuum bubble removing machine

Abstract

The utility model relates to the technical field of vacuum defoaming processing, and discloses a vacuum defoaming machine which comprises a machine frame, a machine cover, a display part and a warning lamp, the machine cover is arranged on the machine frame, the display part is installed on one side face or a front door of the machine cover in a built-in mode, the warning lamp is installed at the upper end of the machine cover, and the machine cover is arranged on the machine frame. A vacuum assembly and a downward pressing assembly are installed in the machine frame in a spaced mode, a partition plate is arranged between the vacuum assembly and the downward pressing assembly, a lower vacuum cavity, an upper vacuum cavity, an outlet conveying line and an inlet conveying line are installed on the machine frame, a vacuum hole channel is formed in the middle of the machine frame, the vacuum hole channel is formed in the lower vacuum cavity, and the lower vacuum cavity is communicated with the upper vacuum cavity. The bottom end of the lower vacuum cavity is connected with the vacuum assembly, the upper vacuum cavity is arranged above the lower vacuum cavity, and the outlet conveying line and the inlet conveying line are arranged on the two sides of the lower vacuum cavity respectively. The defoaming efficiency is high; the defoaming cost is low; meanwhile, water vapor can be eliminated in an attached mode, the bubble removing labor cost is low, and the good market application value is achieved.

Description

Technical Field

[0001] This utility model relates to the field of vacuum defoaming processing technology, and more specifically, to a vacuum defoaming machine. Background Technology

[0002] In the production of electronic products, dispensing and coating processes are widely used. However, during dispensing and coating, air bubbles can easily form inside the colloid. These air bubbles pose a challenge to the reliability of the product and need to be removed.

[0003] Currently, there are two commonly used defoaming methods: 1. manual needle puncture defoaming; 2. long-term static defoaming after application. The disadvantages of these defoaming methods are: incomplete defoaming, low product yield, low defoaming efficiency, and high labor cost for defoaming.

[0004] Existing technology has flaws and needs improvement. Utility Model Content

[0005] To address the shortcomings of current technology, this invention provides a vacuum defoaming machine.

[0006] The present invention provides a vacuum defoaming machine, comprising a frame, a cover, a display, and a warning light. The cover is mounted on the frame, and the display is installed inside one side or the front door of the cover. The warning light is installed on the upper end of the cover. Vacuum components and pressure components are installed at intervals inside the frame, with a partition between the vacuum components and the pressure components. A lower vacuum chamber, an upper vacuum chamber, an outlet conveyor line, and an inlet conveyor line are installed on the frame. A vacuum channel is provided in the middle of the frame, and the vacuum channel is located in the lower vacuum chamber, with the bottom end of the lower vacuum chamber connected to the vacuum components. The upper vacuum chamber is located above the lower vacuum chamber, and the bottom end of the upper vacuum chamber passes through the frame and connects to the pressure components. The outlet conveyor line and the inlet conveyor line are respectively provided on both sides of the lower vacuum chamber.

[0007] Preferably, the lower vacuum chamber includes a lower vacuum tank, a vacuum conveying line, a vacuum gauge, a vacuum pipe, a rotary air outlet, a first power assembly, and a second power assembly. The rotary air outlet is located in the middle of the lower vacuum tank. The bottom end of the rotary air outlet is connected to one end of the vacuum pipe, and the other end of the vacuum pipe is connected to the vacuum assembly. The vacuum conveying line is installed in the lower vacuum tank. The first power assembly and the second power assembly are arranged parallel to each other at one end of the lower vacuum tank. The output ends of the first power assembly and the second power assembly both pass through the lower vacuum tank and are connected to the vacuum conveying line. The vacuum gauge is located at the bottom of the lower vacuum tank and is located on one side of the vacuum pipe.

[0008] Preferably, the vacuum conveyor line includes a vacuum vertical plate, a moving chain, a moving rail, a sliding shaft, multiple guide shafts, a sliding fixed plate, a fixed rail, a fixed chain, a sliding mounting plate, a first coupling, and a second coupling. The vacuum vertical plate and the sliding mounting plate are disposed opposite each other in the lower vacuum groove. The moving rail is disposed at the top of the vacuum vertical plate, and the moving chain is disposed on one side of the vacuum vertical plate. The fixed rail is disposed at the top of the sliding fixed plate, and the fixed chain is disposed on one side of the sliding fixed plate. One end of the multiple guide shafts is vertically disposed within the vacuum vertical plate, and the other end of the multiple guide shafts passes vertically through the sliding fixed plate and is respectively connected to the first coupling and the sprocket on the sliding mounting plate. The second coupling connects to one end of the sliding shaft, and the other end of the sliding shaft passes vertically through the sliding fixed plate and is disposed within the vacuum vertical plate.

[0009] Preferably, the upper vacuum chamber includes a base plate support, multiple linear bearings, multiple lifting shafts, an upper vacuum groove, a vacuum cover, a monitoring unit, and a sensor support. The multiple linear bearings are arranged sequentially at intervals and all pass vertically through the frame. Multiple lifting shafts are sequentially and vertically installed inside the multiple linear bearings. One end of each lifting shaft is connected to the base plate support inside the frame, and the other end passes vertically upward through the upper vacuum groove. The base plate support is connected to the output end of the lower pressure assembly inside the frame. The vacuum cover is installed on the top of the upper vacuum groove, and the monitoring unit is installed on the vacuum cover. The sensor support is installed on the side of the upper vacuum groove, and a sensor is installed on the sensor support.

[0010] Preferably, the vacuum assembly includes a vacuum pump, a vacuum base, a vacuum hose, and an exhaust filter. The bottom of the vacuum pump is mounted on the vacuum base, which is located inside the frame. The top of the vacuum pump is connected to the vacuum hose and the exhaust filter via a first elbow pipe and a second elbow pipe, respectively. Both the first elbow pipe and the second elbow pipe are fitted with clamps at their connection points with the vacuum pump.

[0011] Preferably, a rotatable side-flipping unit is also provided on one side of the machine cover, and the side-flipping unit is located above the monitoring unit.

[0012] Preferably, the frame is further provided with a first light curtain unit, a second light curtain unit and a third light curtain unit. The first light curtain unit is located on one side of the inlet conveyor line, the second light curtain unit is located on one side of the outlet conveyor line, and the third light curtain unit is located between the side-flipping unit and the lower vacuum chamber.

[0013] Preferably, the pressing assembly includes a pressing base, a pressing motor, and a pressing telescopic rod. The pressing base is located inside the frame, the pressing motor is located inside the pressing base, the output end of the pressing motor is connected to one end of the pressing telescopic rod, and the other end of the pressing telescopic rod is vertically upward connected to the base plate support.

[0014] Compared with the advantages of existing technologies, this utility model has the advantages of thorough defoaming, high product yield, high defoaming efficiency, low defoaming cost, and can also remove moisture and dry the product surface at the same time, achieving multiple benefits, improving product quality, and having low labor cost for defoaming, thus having good market application value. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the lower vacuum cavity structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the vacuum conveyor line structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the upper vacuum cavity structure of this utility model.

[0019] Labels: 1. Frame; 2. Display unit; 3. Warning light; 4. Vacuum assembly; 5. Lower vacuum chamber; 6. Upper vacuum chamber; 7. Outlet conveyor line; 8. Inlet conveyor line; 9. First light curtain unit; 10. Second light curtain unit; 11. Third light curtain unit; 12. Side tilting unit; 13. Lower vacuum tank; 61. Vacuum conveyor line; 62. Vacuum gauge; 63. Vacuum pipe; 64. Rotary air outlet; 65. First power assembly; 66. Second power assembly; 67. Vacuum upright plate; 621. Moving chain; 622. Moving rail; 623. Sliding shaft; 624. Multiple guide shafts; 625. Sliding fixing plate; 626. Fixing rail; 627. Fixing chain; 628. Sliding mounting plate; 629. First coupling; 6210. Second coupling; 6211. Base plate bracket; 71. Multiple linear bearings; 72. Multiple lifting shafts; 73. Upper vacuum tank; 74. Vacuum cover; 75. Monitoring unit; 76. Sensor support; 77. Detailed Implementation

[0020] It should be noted that the above-mentioned technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this utility model specification; and, for those skilled in the art, improvements or modifications can be made based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims of this utility model.

[0021] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings show preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0022] It should be noted that when a component is described as being "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is described as being "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0024] The present invention will now be described in detail with reference to the accompanying drawings.

[0025] like Figures 1-4 As shown: A vacuum defoaming machine includes a frame 1, a cover, a display 2, and a warning light 3. The cover is mounted on the frame 1. The display 2 is installed inside one side or the front door of the cover. The warning light 3 is installed on the upper end of the cover. Vacuum components 4 and pressure components 5 are installed at intervals inside the frame 1. A partition is provided between the vacuum components 4 and the pressure components 5. A lower vacuum chamber 6, an upper vacuum chamber 7, an outlet conveyor line 8, and an inlet conveyor line 9 are installed on the frame 1. A vacuum channel is provided in the middle of the frame 1. The vacuum channel is located in the lower vacuum chamber 6, and the bottom end of the lower vacuum chamber 6 is connected to the vacuum components 4. The upper vacuum chamber 7 is located above the lower vacuum chamber 6, and the bottom end of the upper vacuum chamber 7 passes through the frame 1 and connects to the pressure components 5. The outlet conveyor line 8 and the inlet conveyor line 9 are respectively provided on both sides of the lower vacuum chamber 6.

[0026] It should be noted that the product is placed on the inlet conveyor line 9 and then conveyed into the lower vacuum chamber 6. The lower vacuum chamber 6, together with the upper vacuum chamber 7, forms a sealed cavity. Then, the vacuum component 4 evacuates the cavity into a vacuum. In the vacuum environment, the bubbles in the colloid expand until they burst. After the bubbles burst, the escaped gas is pumped away and discharged, thus achieving the purpose of defoaming. After defoaming is completed, the upper vacuum chamber 7 is lifted by the lower pressure component 5, opening the sealed cavity, and the product flows into the outlet conveyor line 8, and then flows out to the next processing station.

[0027] Preferably, the lower vacuum chamber 6 includes a lower vacuum trough 61, a vacuum conveying line 62, a vacuum gauge 63, a vacuum pipe 64, a rotating air outlet 65, a first power assembly 66, and a second power assembly 67. The rotating air outlet 65 is disposed in the middle of the lower vacuum trough 61. The bottom end of the rotating air outlet 65 is connected to one end of the vacuum pipe 64, and the other end of the vacuum pipe 64 is connected to the vacuum assembly 4. The vacuum conveying line 62 is installed in the lower vacuum trough 61. The first power assembly 66 and the second power assembly 67 are arranged parallel to each other at one end of the lower vacuum trough 61. The output ends of the first power assembly 66 and the second power assembly 67 both pass through the lower vacuum trough 61 and are connected to the vacuum conveying line 62. The vacuum gauge 63 is disposed at the bottom of the lower vacuum trough 61 and is located on one side of the vacuum pipe 64.

[0028] It should be noted that the first power component 66 and the second power component 67 are used to drive the vacuum conveyor line 62 to fix and convey the products conveyed by the inlet conveyor line 9. After fixing, the upper vacuum chamber 7 is pressed down to form a sealed chamber. Then, the vacuum component 4 extracts air from the sealed chamber through the rotary air outlet 65 connected by the vacuum pipe 64 to form a vacuum, so that the product is defoamed. After defoaming, the upper vacuum chamber 7 is raised, and the vacuum conveyor line 62 conveys the defoamed product to the outlet conveyor line 8 for discharge.

[0029] Preferably, the vacuum conveyor line 62 includes a vacuum upright plate 621, a moving chain 622, a moving rail 623, a sliding shaft 624, multiple guide shafts 625, a sliding fixing plate 626, a fixing rail 627, a fixing chain 628, a sliding mounting plate 629, a first coupling 6210, and a second coupling 6211. The vacuum upright plate 621 and the sliding mounting plate 629 are disposed opposite each other in the lower vacuum groove 61. The moving rail 623 is provided at the top of the vacuum upright plate 621, and the moving chain 622 is provided on one side of the vacuum upright plate 621. The top of the sliding fixing plate 626 is provided with the fixing rail 627, and the fixing chain 628 is provided on one side of the sliding fixing plate 626. One end of the plurality of guide shafts 625 is vertically disposed in the vacuum upright plate 621, and the other end of the plurality of guide shafts 625 passes vertically through the sliding fixing plate 626 and is respectively connected to the first coupling 6210 and the sprocket on the sliding mounting plate 629. The second coupling 6211 is connected to one end of the sliding rotating shaft 624, and the other end of the sliding rotating shaft 624 passes vertically through the sliding fixing plate 626 and is disposed in the vacuum upright plate 621.

[0030] It should be noted that the first power assembly 66 and the second power assembly 67 drive the first coupling 6210 and the second coupling 6211 respectively through multiple chains. Subsequently, the first coupling 6210 and the second coupling 6211 drive multiple guide shafts 625 and sliding shafts 624 to rotate. The first coupling 6210 and the second coupling 6211 are linked by a coupling chain. A transition device is provided in the middle of the sliding mounting plate 629, and the transition device is also connected to the coupling chain to rotate. The multiple guide shafts 625 and the sliding shafts 624, driven by the first coupling 6210 and the second coupling 6211, enable the sliding fixed plate 626 to slide left and right, which, together with the vacuum upright plate 621, clamps the product and realizes vacuum processing and defoaming in the sealed cavity.

[0031] Furthermore, both the moving chain 622 and the fixed chain 628 are driven by gears on the sliding shaft 624.

[0032] Furthermore, the first power assembly 66 and the second power assembly 67 can work independently. The first power assembly 66 can drive the first coupling 6210 to move the vacuum upright plate 621 and the sliding fixed plate 626. The second power assembly 67 can drive the moving chain 622 and the fixed chain 628 to cooperate with the moving rail 623 and the fixed rail 627 to fix and support the product.

[0033] Preferably, the upper vacuum chamber 7 includes a base plate support 71, multiple linear bearings 72, multiple lifting shafts 73, an upper vacuum groove 74, a vacuum cover 75, a monitoring unit 76, and a sensor support 77. The multiple linear bearings 72 are arranged sequentially at intervals and all pass vertically through the frame 1. Multiple lifting shafts 73 are sequentially and vertically installed inside the multiple linear bearings 72. One end of each lifting shaft 73 is connected to the base plate support 71 in the frame 1, and the other end passes vertically upward through the upper vacuum groove 74. The base plate support 71 is connected to the output end of the pressing component 5 in the frame 1. The vacuum cover 75 is installed on the top of the upper vacuum groove 74, and the monitoring unit 76 is installed on the vacuum cover 75. The sensor support 77 is installed on the side of the upper vacuum groove 74, and a sensor is installed on the sensor support 77.

[0034] It should be noted that the base plate bracket 71 is driven to move up and down by the pressing component 5, thereby enabling multiple lifting shafts 73 to drive the upper vacuum groove 74 to move up and down to cooperate with the lower vacuum groove 61 to form a sealed cavity. The sensor on one side of the upper vacuum groove 74 is used to sense the sealing between the upper vacuum groove 74 and the lower vacuum groove 61. A monitoring unit 76 is set on it to observe the product in the sealed cavity through the vacuum cover 75.

[0035] Furthermore, the vacuum cover 75 is made of a transparent material, such as a glass cover.

[0036] Preferably, the vacuum assembly 4 includes a vacuum pump, a vacuum base, a vacuum hose, and an exhaust filter. The bottom of the vacuum pump is located on the vacuum base, which is located inside the frame 1. The top of the vacuum pump is connected to the vacuum hose and the exhaust filter through a first elbow pipe and a second elbow pipe, respectively. The connection between the first elbow pipe and the second elbow pipe and the vacuum pump is equipped with clamps.

[0037] It should be noted that the connection points of the first and second elbow pipes with the vacuum hose and the exhaust filter, as well as the connection points of the vacuum hose with the vacuum pipe 64 inside the lower vacuum chamber 6, are all equipped with clamps.

[0038] Furthermore, the vacuum assembly also includes multiple pipes, a vacuum baffle valve element, and a vacuum breaking valve element. The multiple pipes are connected sequentially, and each pipe connection is equipped with a clamp. After the multiple pipes are connected sequentially, one end is connected to a vacuum pipe, and the other end is connected to one end of a vacuum hose. The other end of the vacuum pipe is connected to the vacuum baffle valve element. The inner side of the vacuum baffle valve element is connected to the front end of a four-way pipe. The rear end of the four-way pipe is connected to a rotating air vent in the lower vacuum chamber. The left end of the four-way pipe is connected to the vacuum breaking valve element, and a sealing ring is installed on the right end of the four-way pipe.

[0039] It should be noted that when the vacuum pump performs vacuum processing on the product in the sealed cavity through the vacuum hose, multiple pipes, vacuum pipe, and four-way pipe, the vacuum baffle valve element set on the four-way pipe is open and working, while the vacuum breaking valve element is closed, realizing the function of quickly extracting air and defoaming. After the product is defoamed, the vacuum baffle valve element set on the four-way pipe is closed, while the vacuum breaking valve element is open, which can inject air into the sealed cavity, realize the opening of the sealed cavity, and transport the product to the outlet conveyor line.

[0040] Furthermore, multiple pipes are connected sequentially, and these pipes can be connected in various ways, such as flexible hose connection, straight pipe connection, or bend connection, not limited to bends or elbows. Any pipe that conforms to the specifications of this device can be considered within the scope of this utility model specification.

[0041] Preferably, a rotatable side-flipping unit 13 is also provided on one side of the machine cover, and the side-flipping unit 13 is located above the monitoring unit 76.

[0042] It should be noted that the side-flipping unit 13 is used by staff to open the machine cover and observe the product in the vacuum chamber through the monitoring unit 76 to perform vacuum degassing.

[0043] Preferably, the frame 1 is further provided with a first light curtain unit 10, a second light curtain unit 11 and a third light curtain unit 12. The first light curtain unit 10 is located on one side of the inlet conveyor line 9, the second light curtain unit 11 is located on one side of the outlet conveyor line 8, and the third light curtain unit 12 is located between the side-flipping unit 13 and the lower vacuum chamber 6.

[0044] It should be noted that the first light curtain unit 10, the second light curtain unit 11, and the third light curtain unit 12 are all located inside the machine enclosure. Furthermore, all three units are safety-certified light curtain products, consisting of two parts: a projector that emits modulated infrared light, which is received by a receiver, forming a protective net. When an object enters the protective net and blocks the light, the receiver circuit immediately reacts through the internal control circuitry, outputting a signal for emergency braking of machine tools such as punch presses and presses. When operators are feeding or retrieving materials, if any part of their body blocks the light, the machine will enter a safe state without harming the operator.

[0045] Preferably, the pressing assembly 5 includes a pressing base, a pressing motor, and a pressing telescopic rod. The pressing base is located inside the frame 1, the pressing motor is located inside the pressing base, the output end of the pressing motor is connected to one end of the pressing telescopic rod, and the other end of the pressing telescopic rod is vertically upward connected to the base plate bracket 71.

[0046] Furthermore, a sealing strip is provided at the sealing connection between the lower vacuum groove and the upper vacuum groove.

[0047] Furthermore, the rotating air vent is equipped with multiple vacuum suction holes.

[0048] It should be noted that the above-mentioned technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this utility model specification; and, for those skilled in the art, improvements or modifications can be made based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims of this utility model.

Claims

1. A vacuum defoaming machine, characterized in that, The device includes a frame, a housing, a display unit, and a warning light. The housing is mounted on the frame. The display unit is installed inside one side or the front door of the housing. The warning light is installed on the upper part of the housing. Vacuum components and pressure components are installed at intervals inside the frame. A partition is provided between the vacuum components and the pressure components. A lower vacuum chamber, an upper vacuum chamber, an outlet conveyor line, and an inlet conveyor line are installed on the frame. A vacuum channel is provided in the middle of the frame. The vacuum channel is located in the lower vacuum chamber and the bottom end of the lower vacuum chamber is connected to the vacuum components. The upper vacuum chamber is located above the lower vacuum chamber and the bottom end of the upper vacuum chamber passes through the frame and connects to the pressure components. The outlet conveyor line and the inlet conveyor line are respectively provided on both sides of the lower vacuum chamber.

2. The vacuum defoaming machine according to claim 1, characterized in that, The lower vacuum chamber includes a lower vacuum tank, a vacuum conveying line, a vacuum gauge, a vacuum pipe, a rotary air outlet, a first power assembly, and a second power assembly. The rotary air outlet is located in the middle of the lower vacuum tank. The bottom end of the rotary air outlet is connected to one end of the vacuum pipe, and the other end of the vacuum pipe is connected to the vacuum assembly. The vacuum conveying line is installed in the lower vacuum tank. The first power assembly and the second power assembly are arranged parallel to each other at one end of the lower vacuum tank. The output ends of the first power assembly and the second power assembly both pass through the lower vacuum tank and are connected to the vacuum conveying line. The vacuum gauge is located at the bottom of the lower vacuum tank and is located on one side of the vacuum pipe.

3. A vacuum defoaming machine according to claim 2, characterized in that, The vacuum conveyor line includes a vacuum vertical plate, a moving chain, a moving rail, a sliding shaft, multiple guide shafts, a sliding fixed plate, a fixed rail, a fixed chain, a sliding mounting plate, a first coupling, and a second coupling. The vacuum vertical plate and the sliding mounting plate are disposed opposite each other in the lower vacuum groove. The moving rail is disposed at the top of the vacuum vertical plate, and the moving chain is disposed on one side of the vacuum vertical plate. The fixed rail is disposed at the top of the sliding fixed plate, and the fixed chain is disposed on one side of the sliding fixed plate. One end of the multiple guide shafts is vertically disposed inside the vacuum vertical plate, and the other end of the multiple guide shafts passes vertically through the sliding fixed plate and is respectively connected to the first coupling and the sprocket on the sliding mounting plate. The second coupling connects to one end of the sliding shaft, and the other end of the sliding shaft passes vertically through the sliding fixed plate and is disposed inside the vacuum vertical plate.

4. A vacuum defoaming machine according to claim 1, characterized in that, The upper vacuum chamber includes a base plate support, multiple linear bearings, multiple lifting shafts, an upper vacuum groove, a vacuum cover, a monitoring unit, and a sensor support. The multiple linear bearings are arranged sequentially at intervals and all pass vertically through the frame. Multiple lifting shafts are installed sequentially and vertically inside the multiple linear bearings. One end of each lifting shaft is connected to the base plate support inside the frame, and the other end passes vertically upward through the upper vacuum groove. The base plate support is connected to the output end of the lower pressure assembly inside the frame. The vacuum cover is installed on the top of the upper vacuum groove, and the monitoring unit is installed on the vacuum cover. The sensor support is installed on the side of the upper vacuum groove, and a sensor is installed on the sensor support.

5. A vacuum defoaming machine according to claim 1, characterized in that, The vacuum assembly includes a vacuum pump, a vacuum base, a vacuum hose, and an exhaust filter. The bottom of the vacuum pump is mounted on the vacuum base, which is located inside the frame. The top of the vacuum pump is connected to the vacuum hose and the exhaust filter via a first elbow pipe and a second elbow pipe, respectively. The connection points between the first elbow pipe, the second elbow pipe, and the vacuum pump are both fitted with clamps.

6. A vacuum defoaming machine according to claim 1, characterized in that, A rotatable side-flipping unit is also provided on one side of the machine cover, and the side-flipping unit is located above the monitoring unit.

7. A vacuum defoaming machine according to claim 1, characterized in that, The frame is also provided with a first light curtain unit, a second light curtain unit and a third light curtain unit. The first light curtain unit is located on one side of the inlet conveyor line, the second light curtain unit is located on one side of the outlet conveyor line, and the third light curtain unit is located between the side-flipping unit and the lower vacuum chamber.

8. A vacuum defoaming machine according to claim 1, characterized in that, The pressing assembly includes a pressing base, a pressing motor, and a pressing telescopic rod. The pressing base is located inside the frame, the pressing motor is located inside the pressing base, the output end of the pressing motor is connected to one end of the pressing telescopic rod, and the other end of the pressing telescopic rod is vertically upward connected to the base plate support.

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