A vacuum blanking device

Abstract

The utility model discloses a kind of vacuum blanking devices, it is related to the field of soft material collection circulation, it includes blanking cylinder, blanking cylinder is located material cylinder lower end, blanking cylinder and material cylinder between being equipped with valve door component, blanking cylinder upper end is equipped with flange one, material cylinder lower end is equipped with flange two corresponding with flange one, flange one is along circumferential and is equipped with annular groove, rubber ring is along circumferential and is equipped in annular groove, flange two is along circumferential and is equipped with circular ring, blanking cylinder lower end is connected with the pipeline groove of vacuum equipment, blanking cylinder side is opened with the ventilation hole connected with external air supply device, the application has the effect of improving the form stability when coating material is blanked.

Description

Technical Field

[0001] This utility model relates to the field of soft material collection and circulation, and in particular to a vacuum feeding device. Background Technology

[0002] Currently, in the production process of coating materials, after the production is completed, the processed coating materials need to be unloaded and collected. The traditional collection method usually uses a disassembly device collection tank or an automated high-frequency vibration collection device.

[0003] Automated high-frequency vibration collection devices are typically connected to a material cylinder, which is used to blow away and dry the coating material. A filter screen is installed at the lower end of the material cylinder, and a conical baffle is installed at the lower end of the filter screen. A cylinder for guiding the airflow is coaxially fixed inside the conical baffle. An external air supply device delivers high-speed airflow into the material cylinder. The airflow passes through the filter screen and blows away the coating material inside the material cylinder. After the blowing is completed, the collection device itself generates high-frequency micro-amplitude vibration, which drives the material cylinder to vibrate through the connection part with the material cylinder. This causes the granular coating material stuck on the inner wall of the material cylinder to loosen and slide to the discharge end, thereby collecting the coating material.

[0004] Regarding the aforementioned technologies, when the device vibrates, mechanical energy is continuously converted into heat energy, causing the temperature of the inner wall of the material cylinder and the inner wall of the collecting device to rise. Some heat-sensitive coating materials are prone to softening and melting, resulting in the scrapping of the coating materials. Therefore, there is an urgent need for a device that can maintain the physical properties of the coating materials while feeding. Utility Model Content

[0005] To improve the morphological stability of coating materials during feeding, this application provides a vacuum feeding device.

[0006] This application provides a vacuum feeding device, which adopts the following technical solution: A vacuum feeding device includes a feeding cylinder located at the lower end of a material cylinder. The material cylinder is used to blow and dry coating materials. A ventilation hole for connecting an external air supply device is provided on one side of the feeding cylinder. A valve assembly for airflow is provided between the feeding cylinder and the material cylinder. The valve assembly is always kept open during operation. A flange 1 is provided circumferentially at the upper end of the feeding cylinder, and a flange 2 corresponding to flange 1 is provided circumferentially at the lower end of the material cylinder. An annular groove is provided circumferentially at the upper end of flange 1, and a sealing ring is arranged circumferentially within the annular groove. A ring is provided circumferentially at flange 2 for covering the outer circle of flange 1. During operation, the ring is in contact with the outer wall of flange 1. A fixing member for fixing flange 1 and flange 2 is provided on the outside of the ring. A pipe groove for connecting a vacuum device is connected to the lower end of the feeding cylinder.

[0007] By adopting the above technical solution, the fixing components use flange one and flange two to fix the material cylinder and the feeding cylinder. The annular groove supports and limits the sealing ring. The sealing ring fits against the inner wall of the annular groove and the lower end of flange two, enhancing the airtightness between the feeding cylinder and the material cylinder. The circular ring seals the circumferential gap between flange one and flange two, further enhancing the airtightness of the device. The external air supply device delivers high-speed airflow into the material cylinder through ventilation holes. The high-speed airflow flows into the material cylinder through the valve assembly. The vacuum equipment collects the coating material in the device through the pipe groove, reducing the frequency and friction of the coating material against the inner wall of the device. This helps maintain the shape stability of the coating material during feeding and reduces the probability of material scrap.

[0008] Optionally, the fastener includes a baffle and several bolts. The baffle is arranged circumferentially along the ring and has assembly holes. The bolts pass through the baffle and the ring and are threadedly connected to the ring. The bolts pass through the ring and abut against the outer wall of the flange.

[0009] By adopting the above technical solution, the assembly hole provides clearance space for the material cylinder to approach and contact the feed cylinder, the baffle blocks the gap between the material cylinder and the feed cylinder, further improving the airtightness between the material cylinder and the feed cylinder, facilitating the vacuum equipment to evacuate the device, and the bolts reinforce the connection between flange one and flange two through the baffle and the ring, reducing the relative displacement between the material cylinder and the feed cylinder in the circumferential direction, which is beneficial to improving the stability of the device operation.

[0010] Optionally, the feeding cylinder includes a circular cylinder and a conical cylinder, with a pipe groove connected to the lower end of the conical cylinder. The cross-section of the conical cylinder is annular, and the diameter of the annulus gradually decreases from top to bottom.

[0011] By adopting the above technical solution, the circular cylinder allows the coating material to fall completely into the circular cylinder range, while the conical cylinder guides the coating material, reducing the probability of the coating material remaining on the inner wall of the cylinder and accelerating the flow speed of the coating material in the conical cylinder, thereby improving the feeding efficiency of the device.

[0012] Optionally, a guide surface is provided between the circular cylinder and the conical cylinder, and the guide surface is inclined from top to bottom from the outer wall of the circular cylinder towards the axis of the circular cylinder.

[0013] By adopting the above technical solution, the guide surface guides the coating material falling along the cylindrical tube, so that the coating material falls into the conical tube along the guide surface, reducing the probability of coating material accumulation and residue, and improving the feeding efficiency of coating material.

[0014] Optionally, a flange three is provided between the circular cylinder and the conical cylinder, and the same clamp is provided on the outer side of the two flange threes. A fixing groove is opened on the inner wall of the clamp along the circumference, and the two flange threes are located in the fixing groove.

[0015] By adopting the above technical solution, the clamps fix and limit the two flanges through the fixing groove, thereby fixing and limiting the cylindrical and conical cylinders, which helps to improve the airtightness and working stability of the device.

[0016] Optionally, the valve assembly includes a ventilation pipe, a valve plate, several push rods (first and second), and an arc-shaped plate. The ventilation pipe is located at the lower end of the material cylinder and communicates with the cylinder on the conical baffle. A limiting groove is formed on the inner wall of the ventilation pipe in the circumferential direction. The valve plate is located in the limiting groove and is slidably connected to the inner wall of the limiting groove in the vertical direction. Several circular holes are formed on the valve plate in the circumferential direction. The arc-shaped plate is located in the circular cylinder and is recessed in the direction from the material cylinder to the circular cylinder. An elastic part is provided between the arc-shaped plate and the circular cylinder. The elastic part is used to drive the arc-shaped plate to move vertically along the inner wall of the circular cylinder. Push rods (first and second) are connected to the lower end of the arc-shaped plate, and push rods (second and third) are connected to the upper end of the arc-shaped plate. In the assembled state of the material cylinder and the feed cylinder, several push rods (first and second) are directly opposite each other, and a gap is left between the valve plate and the lower end of the limiting groove.

[0017] By adopting the above technical solution, when assembling the material cylinder and the feeding cylinder, the operator pushes the material cylinder to contact the arc plate. The lower end of the material cylinder is pushed along the surface of the arc plate until it is completely in contact with flange one and flange two. At this time, the elastic part pushes the arc plate upward, which causes the arc plate to drive the top rod two upward. The top rod two pushes the top rod one upward, thereby lifting the valve plate. The limiting groove guides the vertical displacement of the valve plate. The airflow in the external air supply device passes through the ventilation hole, enters the ventilation pipe, and passes through the round hole into the material cylinder. During the movement of the material cylinder, the valve blocks the coating material leaking from the material hole, reducing the probability of coating material loss.

[0018] Optionally, the elastic part includes a slider and an elastic element. The inner wall of the circular cylinder has several parallel grooves along the vertical direction. The slider is located in the groove and is slidably connected to the inner wall of the groove along the length of the groove. The elastic element is located at the lower end of the groove. One end of the elastic element is fixedly connected to the inner wall of the groove, and the other end is connected to the slider. The slider is connected to the end of the arc plate away from the material cylinder. In its natural state, the elastic element has a tendency to push the slider away from the conical cylinder. A blocking rod is threaded on the wall of the circular cylinder. After the arc plate is raised, the blocking rod passes through the cylinder wall and abuts against the slider.

[0019] By adopting the above technical solution, the chute guides and limits the vertical displacement of the slider. When the arc plate moves downward, it drives the slider to move downward. The elastic element provides clearance space for the slider. After the material cylinder and the feed cylinder are assembled, the elastic element pushes the slider upward. The slider drives the arc plate to move upward, so that the arc plate contacts the top rod and lifts the top rod. At this time, the rotating blocking rod makes the blocking rod abut against the slider and blocks the downward displacement of the slider during vacuuming, which helps to improve the stability of the device operation.

[0020] Optionally, the arc-shaped plate has several through holes along its circumference.

[0021] By adopting the above technical solution, part of the airflow delivered by the air supply device is transported into the ventilation duct through the through hole, increasing the airflow through the arc plate and improving the device's blowing effect on the coating material.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The fasteners fix the material cylinder and the feed cylinder by fixing flange one and flange two. The annular groove supports and limits the sealing ring. The sealing ring fits against the inner wall of the annular groove and the lower end of flange two, enhancing the airtightness between the feed cylinder and the material cylinder. The ring seals the circumferential gap between flange one and flange two, further enhancing the airtightness of the device. The external air supply device delivers high-speed airflow into the material cylinder through the ventilation holes. The high-speed airflow flows into the material cylinder through the valve assembly. The vacuum equipment collects the coating material in the device through the pipe groove, reducing the frequency and friction of the coating material against the inner wall of the device, which helps maintain the physical properties of the coating material and reduces the probability of material scrap. 2. The assembly hole provides clearance for the material cylinder to approach and contact the discharge cylinder. The baffle blocks the gap between the material cylinder and the discharge cylinder, further improving the airtightness between the material cylinder and the discharge cylinder, facilitating the vacuum equipment to evacuate the device. The bolts reinforce the connection between flange one and flange two through the baffle and the ring, reducing the relative displacement between the material cylinder and the discharge cylinder in the circumferential direction, which helps to improve the stability of the device operation. 3. The circular cylinder allows the coating material to fall completely within its range, while the conical cylinder guides the coating material, reducing the probability of it remaining on the inner wall of the cylinder and accelerating its flow rate within the conical cylinder, thus improving the feeding efficiency of the device. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a vacuum feeding device.

[0024] Figure 2 This is a cross-sectional view of the feed cylinder.

[0025] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0026] Figure 4 This is a schematic diagram designed to highlight the internal structure of the feed tube.

[0027] Explanation of reference numerals in the attached drawings: 1. Feeding cylinder; 11. Circular cylinder; 111. Ventilation hole; 12. Conical cylinder; 121. Pipe groove; 122. Flange three; 123. Clamp; 1231. Fixing groove; 13. Flange one; 131. Annular groove; 132. Sealing ring; 2. Material cylinder; 21. Circular cylinder; 22. Flange two; 23. Circular ring; 24. Baffle plate; 25. Bolt; 3. Guide surface; 4. Valve assembly; 41. Ventilation pipe; 411. Limiting groove; 42. Valve plate; 421. Circular hole; 43. Top rod one; 44. Top rod two; 45. Arc plate; 451. Through hole; 5. Elastic part; 51. Sliding block; 52. Elastic element; 53. Slide groove; 54. Blocking rod; 55. Straight rod. Detailed Implementation

[0028] The present application will be further described in detail below with reference to all the accompanying drawings.

[0029] This application discloses a vacuum feeding device. Example

[0030] Reference Figure 1 and Figure 2 A vacuum feeding device includes a feeding cylinder 1, which includes a circular cylinder 11 and a conical cylinder 12. The circular cylinder 11 is located above the conical cylinder 12 and is used to dock with the material cylinder 2. The conical cylinder 12 guides the material and directs the material to flow out.

[0031] Reference Figure 1 and Figure 3 Both the circular cylinder 11 and the conical cylinder 12 are circumferentially mounted on the side of each other. A clamp 123 is mounted on the outside of the two flanges 122. The inner wall of the clamp 123 is provided with an annular groove 131 for accommodating the flanges 122. Both flanges 122 are located in the annular groove 131 and fit against the inner wall of the annular groove 131. The clamp 123 fixes and limits the two flanges 122 through the annular groove 131, thereby fixing and limiting the circular cylinder 11 and the conical cylinder 12, which helps to enhance the stability and airtightness of the device structure.

[0032] Reference Figure 1 and Figure 3A flange 13 is circumferentially mounted on the upper end of the cylindrical cylinder 11. An annular groove 131 is formed circumferentially on the upper end of flange 13, and a sealing ring 132 is installed within the annular groove 131. The annular groove 131 supports and limits the sealing ring 132. The sealing ring 132 is made of an elastic material, such as rubber. A flange 22, corresponding to flange 13, is mounted on the lower end of the material cylinder 2. After the lower end of the material cylinder 2 is aligned with the upper end of the cylindrical cylinder 11, flange 22 covers the annular groove 131. The sealing ring 132 contacts and fits against both flange 13 and flange 22, which helps improve the connection stability and airtightness between the material cylinder 2 and the cylindrical cylinder 11. A circular ring 23 is circumferentially mounted on the outer circumference of flange 22. The circular ring 23 covers the gap between flange 13 and flange 22, further enhancing the airtightness between the material cylinder 2 and the cylindrical cylinder 11.

[0033] Reference Figure 1 and Figure 3 A baffle plate 24 is installed circumferentially on the outer wall of the ring 23. An assembly hole is opened on one side of the baffle plate 24 along the radial direction. When the material barrel is close to the cylindrical cylinder 11, the assembly hole avoids the cylindrical cylinder 11, so that the material barrel 2 and the cylindrical cylinder 11 are aligned and installed. The baffle plate 24 blocks the connection between the material barrel 2 and the cylindrical cylinder 11. Several bolts 25 are installed circumferentially on the baffle plate 24. The bolts 25 pass through the baffle plate 24 and the ring 23 and are threadedly connected to the ring 23. After passing through the ring 23, the bolts 25 abut against the outer wall of the flange 13. At this time, the head of the bolt 25 abuts against the outer wall of the baffle plate, reducing the probability of relative rotation between the flange 13 and the flange 22, which helps to strengthen the connection strength between the flange 13 and the flange 22.

[0034] Reference Figure 1 and Figure 3 The inner wall of the cylindrical cylinder 11 has ventilation holes 111 for connecting to an external air supply device. The lower end of the conical cylinder 12 is connected to a pipe groove 121 for connecting to a vacuum device. The end of the pipe groove 121 away from the conical cylinder 12 is provided with a connecting flange along the circumference. The external air supply device delivers high-speed airflow into the material cylinder 2 through the ventilation holes. After the airflow enters the material cylinder 2 and disperses the coating material, the vacuum device extracts the air from the device through the pipe groove 121, creating a vacuum inside the device. Under the action of the pressure difference between the inside and outside, the coating material is transported from the material barrel to the cylindrical cylinder 11 and enters the discharge end of the pipe groove 121 through the conical tube. This helps to reduce the friction and frequency between coating material particles and between particles and the inner wall of the device, reduce heat generation, help maintain the physical form of the coating material, and reduce the probability of material scrap.

[0035] Reference Figure 1 and Figure 3A guide surface 3 is connected between the circular cylinder 11 and the conical cylinder 12. The guide surface 3 extends from the outer wall of the circular cylinder 11 toward the axis of the circular cylinder 11 and is inclined from the circular cylinder 11 toward the conical cylinder 12. The guide surface 3 guides the coating material flowing from the circular cylinder 11 to the conical cylinder 12, accelerates the flow speed of the coating material, and reduces the probability of the coating material remaining on the inner wall, which is beneficial to improving the feeding efficiency of the device.

[0036] Reference Figure 3 and Figure 4 Material cylinder 2 (reference) Figure 1 A valve assembly 4 is installed between the material cylinder 2 and the cylindrical cylinder 11. The valve assembly 4 includes a ventilation pipe 41, a valve plate 42, several push rods 43, several push rods 44, and an arc-shaped plate 45. The ventilation pipe 41 is located between the material cylinder 2 (reference) and the cylindrical cylinder 11. Figure 1 The ventilation duct 41 is connected to the cylindrical cylinder 11 and is used to guide the airflow. The inner wall of the ventilation duct 41 has a limiting groove 411 for accommodating the valve plate 42. The limiting groove 411 guides and limits the vertical displacement of the valve plate 42. The arc plate 45 is installed inside the cylindrical cylinder 11 and is coaxial with the cylindrical cylinder 11. An elastic part 5 is installed between the arc plate 45 and the inner wall of the cylindrical cylinder 11. The elastic part 5 is used to drive the arc plate 45 to move along the axis of the cylindrical cylinder 21. Several push rods 43 are connected to the lower end of the valve and several push rods 44 are connected to the upper end of the arc plate 45. When the arc plate 45 moves upward, the push rods 43 push the push rods 44 upward, thereby causing the push rods 44 to push the valve upward. Thus, the valve always maintains a gap with both sides of the limiting groove 411 in the vertical direction when it is in operation.

[0037] Reference Figure 3 and Figure 4 The valve plate 42 has multiple circular holes 421 circumferentially open, and all the circular holes 421 are directly opposite the inner wall of the limiting groove 411. The material cylinder 2 (reference) Figure 1 When not assembled with the cylindrical cylinder 11, the valve plate 42 contacts the inner wall of the limiting groove 411, and the inner wall of the limiting groove 411 blocks the circular hole 421, so that the valve plate 42 catches the packaged material leaking from the material cylinder 2, thereby reducing the probability of the packaged material leaking to the outside.

[0038] Reference Figure 3 and Figure 4 Material cylinder 2 (reference) Figure 1 After the circular cylinder 11 is assembled, under the action of the elastic part 5, the arc plate 45 moves upward to lift the top rod, thereby pushing the valve to move upward. A gap is left between the valve and the bottom of the limiting groove 411, so that the airflow passes through the circular hole 421. The arc plate 45 has several through holes 451 along the circumference to facilitate the passage of airflow, thereby increasing the flow rate of the coating material falling into the circular cylinder 11, which is beneficial to improving the feeding efficiency of the device.

[0039] Reference Figure 3 and Figure 4 The elastic part 5 includes a slider 51 and an elastic element 52. The inner wall of the cylindrical cylinder 11 is provided with a plurality of grooves 53 along the circumferential direction. The grooves 53 are arranged vertically. The slider 51 is located in the groove 53 and is slidably connected to the inner wall of the groove 53 along the vertical direction. The groove 53 guides and limits the slider 51 along the vertical direction. A straight rod 55 is provided at the lower end of the groove 53. An elastic element 52 is installed on the outside of the straight rod 55. The elastic element 52 can be a spring. The spring is sleeved on the outside of the straight rod 55 and slidably connected to the straight rod 55. The straight rod 55 supports and guides the spring. One end of the spring is connected to the lower end of the groove 53 and the other end is connected to the slider 51. In its natural state, the spring has the tendency to push the slider 51 away from the conical cylinder 12.

[0040] Reference Figure 3 and Figure 4 The end of slider 51 away from the inner wall of cylindrical cylinder 11 is connected to arc-shaped plate 45, and material cylinder 2 (reference) Figure 1 As the material cylinder 2 approaches the circular cylinder 11, its lower end moves along the surface of the arc-shaped plate 45 until flange 13 and flange 22 are directly opposite each other. During this movement, the arc-shaped plate 45 gradually moves downward, causing the slider 51 to move downward as well. The elastic element 52 provides vertical movement space for the slider 51. (Reference: Material cylinder 2) Figure 1 After the cylinder 11 is aligned, the elastic element 52 pushes the slider 51 upward, causing the slider 51 to move the arc plate 45 upward, thereby bringing the arc plate 45 into contact with the push rod and lifting the push rod. A blocking rod 54, corresponding to the slider 51, is installed on the outer wall of the cylinder 11. In the installed state, the blocking rod 54 passes through the cylinder wall of the cylinder 11 and abuts against the slider 51, fixing the position of the slider 51, which in turn fixes the position of the arc plate 45, ultimately fixing the position of the valve plate 42, thus improving the stability of the valve plate 42's operation.

[0041] The implementation principle of the vacuum feeding device in this application embodiment is as follows: The operator pushes the material cylinder 2 close to the circular cylinder 11, so that the material cylinder 2 abuts against the circular cylinder 11, the flange 13 and the flange 22 are aligned, the rubber ring 132 seals between the material cylinder 2 and the circular cylinder 11, and the ring 23 abuts against the outer wall of the flange 13 to further enhance the sealing performance of the device. The vacuum equipment evacuates the air in the device through the pipe groove 121, so that a vacuum space is formed in the device. Under the action of pressure difference, the coating material enters the circular cylinder 11 through the ventilation pipe 41, passes through the circular hole 421, and slides from the circular cylinder 11 into the conical cylinder 12, and is finally output through the pipe groove 121. During the feeding process, the vacuum extracts the coating material, which reduces the friction and friction frequency between the particles of the coating material and between the particles and the inner wall of the device, thereby reducing the heat generated by friction, reducing the probability of the coating material melting due to heat, and helping to maintain the physical properties of the coating material.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vacuum feeding device, comprising a feeding cylinder (1), the feeding cylinder (1) being located at the lower end of a material cylinder (2), the material cylinder (2) being used for blowing and drying coating materials, characterized in that: The feeding cylinder (1) has a ventilation hole (111) on one side for connecting to an external air supply device. A valve assembly (4) for airflow is provided between the feeding cylinder (1) and the material cylinder (2). The valve assembly (4) is always kept open during operation. A flange (13) is provided circumferentially at the upper end of the feeding cylinder (1). A flange (22) corresponding to flange (13) is provided circumferentially at the lower end of the material cylinder (2). A circumferential opening is provided at the upper end of flange (13). There is an annular groove (131), and a sealing ring (132) is arranged circumferentially inside the annular groove (131). The second flange (22) is provided with a ring (23) circumferentially for covering the outer circle of the first flange (13). In the working state, the ring (23) is in contact with the outer wall of the first flange (13). The outer side of the ring (23) is provided with a fixing member for fixing the first flange (13) and the second flange (22). The lower end of the feed cylinder (1) is connected to a pipe groove (121) for connecting vacuum equipment.

2. The vacuum feeding device according to claim 1, characterized in that: The fastener includes a baffle (24) and several bolts (25). The baffle (24) is arranged circumferentially along the ring (23) and has assembly holes. The bolts (25) pass through the baffle (24) and the ring (23) and are threadedly connected to the ring (23). The bolts (25) pass through the ring (23) and abut against the outer wall of the flange (13).

3. The vacuum feeding device according to claim 1, characterized in that: The feeding cylinder (1) includes a circular cylinder (11) and a conical cylinder (12). The pipe groove (121) is connected to the lower end of the conical cylinder (12). The cross-section of the conical cylinder (12) is in the shape of a ring (23), and the diameter of the ring (23) gradually decreases from top to bottom.

4. The vacuum feeding device according to claim 3, characterized in that: A guide surface (3) is provided between the circular cylinder (11) and the conical cylinder (12). The guide surface (3) is inclined from the outer wall of the circular cylinder (11) downwards towards the axis of the circular cylinder (11).

5. A vacuum feeding device according to claim 3, characterized in that: Flange 3 (122) is provided between the circular cylinder (11) and the conical cylinder (12). The same clamp (123) is provided on the outside of the two flange 3 (122). The inner wall of the clamp (123) is provided with a fixing groove (1231) along the circumferential direction. Both flange 3 (122) are located in the fixing groove (1231).

6. The vacuum feeding device according to claim 1, characterized in that: The valve assembly (4) includes a ventilation pipe (41), a valve plate (42), several push rods (43), several push rods (44), and an arc plate (45). The ventilation pipe (41) is located at the lower end of the material cylinder (2) and communicates with the cylinder (21) on the conical baffle. A limiting groove (411) is opened in the circumferential direction on the inner wall of the ventilation pipe (41). The valve plate (42) is located in the limiting groove (411) and is slidably connected to the inner wall of the limiting groove (411) in the vertical direction. Several circular holes (421) are opened in the circumferential direction on the valve plate (42). The arc plate (45) is located on the cylindrical cylinder (11). The material cylinder (2) is recessed in the direction of the circular cylinder (11). An elastic part (5) is provided between the arc plate (45) and the circular cylinder (11). The elastic part (5) is used to drive the arc plate (45) to move vertically along the inner wall of the circular cylinder (11). The first push rod (43) is connected to the lower end of the arc plate (45), and the second push rod (44) is connected to the upper end of the arc plate (45). When the material cylinder (2) and the feed cylinder (1) are assembled, several first push rods (43) and several second push rods (44) are aligned one to one. There is a gap between the valve plate (42) and the lower end of the limiting groove (411).

7. A vacuum feeding device according to claim 6, characterized in that: The elastic part (5) includes a slider (51) and an elastic element (52). The inner wall of the cylindrical tube (11) is provided with several parallel grooves (53) along the vertical direction. The slider (51) is located in the groove (53) and is slidably connected to the inner wall of the groove (53) along the length direction of the groove (53). The elastic element (52) is located at the lower end of the groove (53). One end of the elastic element (52) is fixedly connected to the inner wall of the groove (53), and the other end is connected to the slider (51). The slider (51) is connected to the end of the arc plate (45) away from the material cylinder (2). In its natural state, the elastic element (52) has the tendency to push the slider (51) away from the conical tube (12). A blocking rod (54) is threaded on the cylindrical tube wall (11). After the arc plate (45) is lifted, the blocking rod (54) passes through the cylindrical tube wall and abuts against the slider (51).

8. A vacuum feeding device according to claim 6, characterized in that: The arc-shaped plate (45) has several through holes (451) along its circumferential direction.

Images