Down jacket automatic down filling equipment and down filling method

Abstract

The invention discloses automatic down filling equipment and a down filling method for down jackets in the technical field of down jacket production. The equipment comprises a shell, a down storage assembly, a pressing mechanism and a pumping mechanism, wherein the down storage assembly, the pressing mechanism and the pumping mechanism are arranged in the shell; the down storage assembly comprises an outer-layer box, an inner-layer box and a weighing assembly arranged at the bottom of the outer-layer box, a channel gap is formed between the outer-layer box and the inner-layer box, openings are formed in the top, and a net plate is arranged at the bottom of the inner-layer box. The inner-layer box body and the outer-layer box body are arranged, the channel gap is formed between the inner-layer box body and the outer-layer box body, the inner-layer box body is used for storing down, the net plate is arranged in the inner-layer box body, floating down can be rapidly compacted through the annular net piece in the weighing link before and after down filling, and weighing reading is stable and accurate; and then air enters through a channel gap, so that the compacted down feather can be quickly blown away to be fluffy, and the down feather is filled into the liner in a uniformly dispersed state through up-and-down hedging airflow of the inner-layer box.

Description

Technical Field

[0001] This invention relates to the field of down jacket production, specifically to an automated down filling device and method for down jackets. Background Technology

[0002] With the development of automation, down filling machines can be used for automated down filling in down jackets. The down filling machine first sucks down into the down storage box through a fan, and then inserts the down filling tube into the down jacket lining. Air is then introduced into the down storage box to fill the down into the down lining. In terms of controlling the amount of down filling, existing down filling machines generally obtain the amount of down filling by weighing in the down storage box.

[0003] Existing measurement methods have shortcomings. During weighing, some down is in a floating state, which may result in low weighing accuracy. When drawing down into the down storage box, down is different from liquid and pure gaseous media. It needs to be mixed with air for intake, so the intake volume is difficult to control precisely. Complex compensation algorithms are often required for regulation and calculation. The parameter settings of the compensation algorithm for different models and batches of down products require a large amount of data to support training. Therefore, the method of controlling the down filling volume by relying on compensation algorithms is costly and not suitable for the production of small-batch products. Summary of the Invention

[0004] The purpose of this invention is to provide an automated down filling device and method for down jackets, which solves the problem of controlling the amount of down filling in existing down filling machines.

[0005] The present invention achieves the above objectives through the following technical solutions: An automated down filling device for down jackets includes a housing and a device disposed within the housing. The down storage assembly includes an outer box and an inner box, and a weighing assembly disposed at the bottom of the outer box. A channel gap is formed between the outer box and the inner box, and the openings are all located at the top. A mesh plate is disposed at the bottom of the inner box. The pressing mechanism includes an annular mesh sheet slidably disposed in the inner box and a driving mechanism for driving the annular mesh sheet, used to compact the floating down during weighing. A valve plate that is opened and closed by air pressure difference is provided in the middle part of the annular mesh sheet. A pumping mechanism is used to dock with the opening and pump in down or air.

[0006] As a preferred embodiment of the present invention, a down filling tube is provided on the side of the inner box. The down filling tube includes a flexible tube, a support frame, and a valve. An electromagnet for contactless control of the valve opening and closing is also provided inside the housing. The valve is controlled by the contactless electromagnet to close after the down filling cycle, so as to replenish the down in the inner box. The contactless driving method can avoid the down storage component from contacting the outside world during the weighing process, which is beneficial to higher weighing accuracy.

[0007] As a preferred embodiment of the present invention, the pumping mechanism includes an outer shell disposed on the housing and two docking parts disposed within the outer shell, which are respectively used to dock with the openings of the outer and inner boxes. The outer shell is provided with a first air duct for air intake and exhaust and a second air duct for air intake, exhaust and pumping in down. The two docking parts are respectively connected to the first air duct and the second air duct. This embodiment specifically sets the structure of the pumping mechanism, which is connected to an external air pump or reversing valve for inflation or deflation, facilitating down storage and filling.

[0008] In a preferred embodiment of the present invention, the outer box and the weighing component are vertically slidably connected. A sliding member is provided at the bottom of the outer box, and a sliding seat is provided on the surface of the weighing component. An elastic support portion for supporting the outer box is provided between the outer box and the weighing component. An annular flexible seal is also provided on the inner wall of the outer shell. The upper end of the flexible seal has a chamfer, which is used to press the outer box and the seal together when the mating part presses the opening of the outer box. This solution allows the outer box to slide vertically and provides a seal that can be contacted and detached. When air or down is pumped in, it is in a compressed and sealed state, which effectively prevents airflow and down leakage. When not compressed, the outer box is lifted and detached from the seal and also detached from the outer shell, thereby making the weighing process more accurate.

[0009] As a preferred embodiment of the present invention, the two docking parts are two annular plates with diameters respectively adapted to the openings, and the two annular plates are connected by spokes. The outer docking part is driven to rise and fall by a telescopic member set in the outer shell. The outer docking part and the first air duct, and the inner docking part and the second air duct are all connected by flexible channels. This solution can achieve accurate weighing of the weighing component by setting the two docking parts to align and press the two openings respectively, and by adapting to the rise and fall through the flexible channels.

[0010] As a preferred embodiment of the present invention, the driving mechanism includes a plurality of piston chambers disposed in the gap between the outer and inner boxes, and a piston portion disposed in the piston chambers. The surface of the piston portion is provided with a guide rope connected to the annular mesh. A steering guide wheel is disposed on the top side of the inner box and is tactilely connected to the guide rope. A hydraulic chamber is disposed between the sliding member and the slide block. A connecting pipe is disposed between the piston chamber and the hydraulic chamber, so that when the outer box is raised, the annular mesh is driven to descend, and when the outer box is descended, the annular mesh is driven to rise. This embodiment, by setting a specific driving mechanism, drives the annular mesh to rise and fall through the lifting and lowering state of the outer box. This linkage of lifting and lowering states does not require power supply and wiring to the inside of the outer box and does not affect the weighing of the outer box.

[0011] In a preferred embodiment of the present invention, the inner box has an extension cylinder on its inward opening to limit the travel of the annular mesh. The valve plate is a split hinged plate with an elastic component at the hinge to keep the valve plate normally closed. An extension arm is provided in the opposite direction of the valve plate hinge. A movable pin is provided on the surface of the annular mesh, and a spring is fitted on the surface of the movable pin to keep it in an upward trend. A limiting part is provided on the outer wall of the extension cylinder to press down the movable pin to press the extension arm when the annular mesh rises. This embodiment locks the valve plate by setting a movable pin to press the extension arm when the annular mesh rises.

[0012] As a preferred embodiment of the present invention, a sliding cylinder is also slidably provided on the inner wall of the extension cylinder, a side air outlet is provided on the surface of the sliding cylinder, and a side hole is provided on the side wall of the extension cylinder. The side air outlet and the side hole are aligned and connected when the extension arm is pressed. This solution allows the airflow to backflow against the annular mesh by opening the side hole when the valve plate is locked, which will not cause down blockage and will not affect the reuse of the annular mesh.

[0013] To implement the aforementioned automated down filling equipment for down jackets, this invention also proposes a down filling method based on any of the aforementioned automated down filling equipment, comprising the following steps: S1: The down filling tube is closed, and a mixture of down and air is pumped into the inner box. The air is discharged through the mesh plate and the gap between the channels. After the pressing mechanism presses the down, the down storage component is weighed to obtain G1. S2: Pump air into the outer and inner boxes and record the pumping flow rate. Open the down filling tube. The air rolls up the down and fills the inner liner through the down filling tube. After the pressing mechanism presses the down, weigh the down storage component to obtain G2. The actual down filling amount is obtained based on the difference between G1 and G2. S3: Compare the actual fill amount with the preset fill amount. If the actual fill amount is large, reduce the pump flow rate in S2; if the actual fill amount is small, increase the pump flow rate.

[0014] The beneficial effects of this invention are as follows: By setting up inner and outer boxes and forming a channel gap in the middle, the inner box is used to store down, and the inside of the inner box is a mesh plate. In the weighing process before and after filling down, the floating down can be quickly compacted by the annular mesh plate, which makes it convenient for the weighing reading to be stable and accurate. Then, the compacted down can be quickly blown away and fluffed by the air intake through the channel gap. The down is filled into the inner liner in a uniformly dispersed state by the airflow from the top and bottom of the inner box. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a side sectional view of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of the structure of section A in the middle; Figure 5 For the present invention Figure 3 Enlarged view of the structure of section B; Figure 6 For the present invention Figure 4 Enlarged view of the structure of section C; Figure 7 This is a cross-sectional view of the down collection component of the present invention; In the diagram: 1. Shell; 11. Electromagnet; 2. Down filling assembly; 21. Outer box; 22. Inner box; 23. Mesh plate; 24. Weighing assembly; 25. Slide; 26. Sliding element; 27. Elastic support; 28. Extension tube; 29. ​​Down filling tube; 210. Valve; 211. Side hole; 3. Pressing mechanism; 31. Annular mesh; 32. Piston chamber; 33. Piston part; 34. Connecting pipe; 35. Steering guide wheel; 36. Valve plate; 37. Extension arm; 38. Movable pin; 39. Spring; 310. Limiting part; 311. Slide; 312. Side air outlet; 4. Pumping mechanism; 41. Shell; 42. Seal; 43. Connecting part; 44. Telescopic element; 45. Flexible channel; 46. First air duct; 47. Second air duct. Detailed Implementation

[0016] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content. Example 1

[0017] like Figure 1-7 As shown, an automated down filling device for down jackets includes a housing 1 and a down storage assembly 2, a pressing mechanism 3, and a pumping mechanism 4 disposed within the housing 1. The down storage assembly 2 includes an outer box 21 and an inner box 22, and a weighing assembly 24 disposed at the bottom of the outer box 21. A channel gap is formed between the outer box 21 and the inner box 22, and the openings are all located at the top. A mesh plate 23 is disposed at the bottom of the inner box 22. The pressing mechanism 3 includes an annular mesh 31 slidably disposed in the inner box 22 and a driving mechanism for driving the annular mesh 31, used to compact the floating down during weighing. A valve plate 36 is disposed in the middle of the annular mesh 31, which is opened and closed by air pressure difference. The pumping mechanism 4 is used to connect to the opening and pump in down or air.

[0018] In this design, by setting up inner and outer boxes and forming a channel gap in the middle, the inner box 22 is used for storing down, and the inside of the inner box 22 is a mesh plate 23. During the weighing process before and after filling, the floating down can be quickly compacted by the annular mesh 31, which makes it easy to make the weighing reading stable and accurate. Then, the compacted down can be quickly blown away and fluffed by the air intake through the channel gap. The down is filled into the inner liner in a uniformly dispersed state by the airflow from the top and bottom of the inner box 22.

[0019] Specifically, the down filling process is as follows: the down filling tube 29 is closed, and a mixture of down and air is pumped into the inner chamber 22. The air is discharged through the mesh plate 23 and the channel gap. After the pressing mechanism 3 presses the down, the down storage component 2 is weighed. Air is pumped into the outer chamber 21 and the inner chamber 22, and the pumping flow rate is recorded. The down filling tube 29 is opened, and the air rolls up the down and fills the inner liner through the down filling tube 29. After the pressing mechanism 3 presses the down, the down storage component 2 is weighed. The actual down filling amount is obtained based on the difference between the two weighings. The actual down filling amount is compared with the preset down filling amount, and the pumping flow rate is adjusted.

[0020] Optionally, the inner box 22 is provided with a down filling tube 29 on its side. The down filling tube 29 includes a hose, a support frame, and a valve 210. The housing 1 is also provided with an electromagnet 11 for contactless control of the opening and closing of the valve 210. The valve 210 is controlled by the contactless electromagnet 11. The valve plate 210 is normally closed and is opened by the attraction of the electromagnet 11 so that it can be closed after the down filling cycle to replenish the down in the inner box 22. The contactless driving method can avoid the down storage component 2 from contacting the outside world during the weighing process, which is conducive to higher weighing accuracy.

[0021] Preferably, the pumping mechanism 4 includes an outer shell 41 mounted on the housing 1 and two docking parts 43 that are raised and lowered inside the outer shell 41, which are respectively used to dock the openings of the outer box 21 and the inner box 22. The outer shell 41 is provided with a first air duct 46 for air intake and exhaust and a second air duct 47 for air intake, exhaust and pumping down. The two docking parts 43 are respectively connected to the first air duct 46 and the second air duct 47. This solution specifically sets the structure of the pumping mechanism 4, which is connected to an external air pump or reversing valve for inflation or deflation, facilitating down storage and filling.

[0022] Preferably, the outer box 21 and the weighing component 24 are vertically slidably connected. A sliding member 26 is provided at the bottom of the outer box 21, and a sliding seat 25 is provided on the surface of the weighing component 24. An elastic support portion 27 supporting the outer box 21 is provided between the outer box 21 and the weighing component 24. An annular flexible sealing member 42 is also provided on the inner wall of the outer shell 41. The upper end of the flexible sealing member 42 has a chamfer, used to press down on the outer box 21 and the sealing member 42 to press them together when the mating portion 43 presses against the opening of the outer box 21. The solution allows the outer box 21 to slide vertically and is equipped with a removable and contactable seal 42. When air or down is pumped in, it is in a compressed and sealed state, effectively preventing airflow and down leakage. When not compressed, the outer box 21 is lifted and detached from the seal 42, and also detached from the outer shell 41, thereby making the weighing process more accurate. The seal 42 is designed as a flexible structure with a certain degree of deformation elasticity, so that the outer box 21 can continue to descend after the outlet contacts the seal 42.

[0023] Preferably, the two docking parts 43 are two annular plates with diameters adapted to the openings, and the two annular plates are connected by spokes. The outer docking part 43 is driven to rise and fall by the telescopic member 44 set in the outer shell 41. The outer docking part 43 and the first air duct 46, and the inner docking part 43 and the second air duct 47 are all connected by a flexible channel 45. This solution can achieve accurate weighing of the weighing component 24 by setting the two docking parts 43 to align and press the two openings respectively, and by adapting to the rise and fall through the flexible channel 45.

[0024] Preferably, the drive mechanism includes several piston chambers 32 disposed in the gap between the outer box 21 and the inner box 22, and a piston part 33 disposed in the piston chamber 32. The surface of the piston part 33 is provided with a guide rope connected to the annular mesh 31. The top side of the inner box 22 is provided with a steering guide wheel 35 that is tactilely connected to the guide rope. A hydraulic chamber is provided between the sliding member 26 and the slide seat 25. A connecting pipe 34 is provided between the piston chamber 32 and the hydraulic chamber, so that when the outer box 21 is raised, the annular mesh 31 is driven to descend, and when the outer box 21 is descended, the annular mesh 31 is driven to rise. This solution, by setting a specific drive mechanism, drives the annular mesh 31 to rise and fall through the lifting and lowering state of the outer box 21. This linkage of lifting and lowering states does not require power supply and wiring to the inside of the outer box 21, and does not affect the weighing of the outer box 21.

[0025] Preferably, the inner box 22 has an extension cylinder 28 on its inward opening to limit the stroke of the annular mesh 31. The valve plate 36 is a split hinged plate with an elastic component at the hinge to keep the valve plate 36 normally closed. An extension arm 37 is provided in the opposite direction of the hinge of the valve plate 36. A movable pin 38 is provided on the surface of the annular mesh 31, and a spring 39 is sleeved on the surface of the movable pin 38 to keep the movable pin 38 in an upward trend. A limiting part 310 is provided on the outer wall of the extension cylinder 28 to press down the movable pin 38 to press the extension arm 37 when the annular mesh 31 rises. In this solution, the movable pin 38 is used to press the extension arm 37 when the annular mesh 31 rises, thereby locking the valve plate 36.

[0026] Preferably, the inner wall of the extension cylinder 28 is also slidably provided with a slide cylinder 311, the surface of the slide cylinder 311 is provided with a side air outlet 312, and the side wall of the extension cylinder 28 is provided with a side hole 211. The side air outlet 312 and the side hole 211 are aligned and connected when the extension arm 37 is pressed. This solution allows the airflow to backflow against the annular mesh 31 by opening the side hole 211 when the valve plate 36 is locked, which will not cause down blockage and will not affect the reuse of the annular mesh 31.

[0027] To implement the aforementioned automated down filling equipment for down jackets, this invention also proposes a down filling method based on any of the aforementioned automated down filling equipment, comprising the following steps: S1: Close the down filling tube 29, pump the down and air mixture into the inner box 22, the air is discharged through the mesh plate 23 and the channel gap, and the pressing mechanism 3 presses the down and weighs the down storage component 2 to obtain G1. S2: Pump air into the outer box 21 and the inner box 22 and record the pumping flow rate. Open the down filling tube 29. The air rolls up the down and fills the inner liner through the down filling tube 29. After the pressing mechanism 3 presses the down, weigh the down storage component 2 to obtain G2. Based on the difference between G1 and G2, obtain the actual down filling amount. S3: Compare the actual fill amount with the preset fill amount. If the actual fill amount is large, reduce the pump flow rate in S2; if the actual fill amount is small, increase the pump flow rate.

[0028] Down storage: Valve 210 is closed, telescopic component 44 drives docking part 43 to descend, initially pressing the openings of outer layer box 21 and inner layer box 22 (side hole 211 and side air outlet 312 are misaligned, extension arm 37 is not locked) to press in seal 42 to prevent air leakage and down loss. Then, an air and down mixture is pumped into the second channel 47 through an external device. The airflow pushes open valve plate 36 and enters inner layer box 22. Down remains above mesh plate 23. Air is discharged from the first air duct 46 through the gap between mesh plate 23 and channel. The down storage amount can be roughly estimated based on existing technology. Then docking part 43 moves upward, outer layer box 21 rises and disengages from seal 42. During the rising process, the end of sliding component 26 squeezes the hydraulic cavity inside slide seat 25, so that hydraulic fluid flows into connecting pipe 34 through hollow sliding component 26, pushing piston part 33 upward (the upward stroke of piston part 33 can be preset by setting a suitable hydraulic cavity cross-sectional area ratio). Annular mesh 31 falls down for weighing. Fluffing treatment: After weighing, the docking part 43 moves down again to press the outer box 21, and the annular mesh 31 rises. This time the depth decreases, so that the annular mesh 41 rises to the highest point, so that the side hole 211 and the side air outlet 312 are aligned. The movable pin 38 presses the extension arm 37 to lock the valve plate 36. The first air duct 46 pumps air into the channel gap. The air enters from below the mesh plate 23 and blows away the compacted down. The airflow is filtered through the annular mesh 31 and discharged from the side hole 211. Filling: Insert the filling tube 29 into the inner liner, open the valve 210, and simultaneously introduce air into the first air duct 46 and the second air duct 47 and record the pumping flow rate. The first air duct 46 rises from the bottom of the mesh plate 23, and the airflow from the second air duct 47 enters above the annular mesh plate 31 through the side hole 211, while also back-blowing the annular mesh plate 31. The airflow from top to bottom disperses the down and blows it into the filling tube 29. When the pumping flow rate reaches the preset value, remove the inner liner, and the first air duct 46 reverses the airflow to suck back the remaining down in the filling tube 29. Then close the valve 210, perform a second weighing, and adjust the next pumping flow rate according to the weighing reading.

[0029] It should be noted that the amount of down added during the down storage process cannot be precisely determined. Therefore, there are slight differences in the down density within the down storage component 2 during the down filling process. Controlling the down filling amount by the pump flow rate may have a slight impact. Therefore, the weight in the first weighing process can be weighted according to empirical parameters. For example, when the down storage amount is large, the pump flow rate can be appropriately reduced according to empirical parameters.

[0030] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An automated down filling device for down jackets, characterized in that, Includes a housing (1) and a part disposed within the housing (1). The down storage assembly (2) includes an outer box (21) and an inner box (22), and a weighing assembly (24) disposed at the bottom of the outer box (21). A channel gap is formed between the outer box (21) and the inner box (22), and the openings are all located at the top. A mesh plate (23) is disposed at the bottom of the inner box (22). The pressing mechanism (3) includes an annular mesh (31) slidably disposed in the inner box (22) and a driving mechanism for driving the annular mesh (31) to compact the floating down during weighing. The annular mesh (31) is provided with a valve plate (36) that is opened and closed by air pressure difference. A pumping mechanism (4) is used to dock with the opening and pump in down or air.

2. The automated down filling equipment for down jackets according to claim 1, characterized in that, The inner box (22) is provided with a down filling tube (29) on its side. The down filling tube (29) includes a hose, a support frame, and a valve (210). The housing (1) is also provided with an electromagnet (11) for non-contact control of the opening and closing of the valve (210).

3. The automated down filling equipment for down jackets according to claim 1, characterized in that, The pumping mechanism (4) includes an outer shell (41) disposed on the housing (1) and two docking parts (43) disposed in the outer shell (41) for docking with the openings of the outer box (21) and the inner box (22), respectively. The outer shell (41) is provided with a first air duct (46) for air inlet and outlet and a second air duct (47) for air inlet and outlet and pumping down. The two docking parts (43) are respectively connected to the first air duct (46) and the second air duct (47).

4. The automated down filling equipment for down jackets according to claim 3, characterized in that, The outer box (21) and the weighing component (24) are vertically slidably connected. A sliding part (26) is provided at the bottom of the outer box (21). A sliding seat (25) is provided on the surface of the weighing component (24). An elastic support part (27) supporting the outer box (21) is provided between the outer box (21) and the weighing component (24). An annular flexible sealing part (42) is also provided on the inner wall of the outer shell (41). The upper end of the flexible sealing part (42) has a chamfer, which is used to press down the outer box (21) and the sealing part (42) to press together when the docking part (43) presses the opening of the outer box (21).

5. The automated down filling equipment for down jackets according to claim 3, characterized in that, The two docking parts (43) are two annular plates with diameters respectively adapted to the openings, and the two annular plates are connected by spokes. The outer docking part (43) is driven to rise and fall by a telescopic member (44) set in the outer shell (41). The outer docking part (43) and the first air duct (46) are connected, and the inner docking part (43) and the second air duct (47) are connected by a flexible channel (45).

6. The automated down filling equipment for down jackets according to claim 4, characterized in that, The drive mechanism includes several piston chambers (32) disposed in the gap between the outer box (21) and the inner box (22), and a piston part (33) disposed in the piston chamber (32). The surface of the piston part (33) is provided with a guide rope connected to the annular mesh (31). The top side of the inner box (22) is provided with a steering guide wheel (35) that is tactilely connected to the guide rope. A hydraulic chamber is provided between the sliding member (26) and the slide (25). A connecting pipe (34) is provided between the piston chamber (32) and the hydraulic chamber, so that when the outer box (21) is raised, the annular mesh (31) is driven to descend, and when the outer box (21) is lowered, the annular mesh (31) is driven to rise.

7. The automated down filling equipment for down jackets according to claim 1, characterized in that, The inner box (22) has an extension cylinder (28) on its inward opening to limit the stroke of the annular mesh (31). The valve plate (36) is a split hinged plate with an elastic component at the hinge to keep the valve plate (36) normally closed. An extension arm (37) is provided in the opposite direction of the hinge of the valve plate (36). A movable pin (38) is provided on the surface of the annular mesh (31) for telescopic movement. A spring (39) is sleeved on the surface of the movable pin (38) to keep the movable pin (38) in an upward trend. A limiting part (310) is provided on the outer wall of the extension cylinder (28) to press down the movable pin (38) to press the extension arm (37) when the annular mesh (31) is raised.

8. The automated down filling equipment for down jackets according to claim 7, characterized in that, The inner wall of the extension cylinder (28) is also slidably provided with a slide cylinder (311), the surface of the slide cylinder (311) is provided with a side air outlet (312), and the side wall of the extension cylinder (28) is provided with a side hole (211). The side air outlet (312) and the side hole (211) are aligned and connected when the extension arm (37) is pressed.

9. A down-filling method based on the automated down-filling equipment for down jackets according to any one of claims 1-8, characterized in that, Includes the following steps: S1: Close the down filling tube (29), pump the down and air mixture into the inner box (22), the air is discharged through the mesh plate (23) and the channel gap, and the pressing mechanism (3) presses the down and weighs the down storage component (2) to obtain G1; S2: Pump air into the outer box (21) and inner box (22) and record the pumping flow rate. Open the down filling tube (29). The air rolls up the down and fills the inner liner through the down filling tube (29). After the pressing mechanism (3) presses the down, weigh the down storage component (2) to obtain G2. Based on the difference between G1 and G2, obtain the actual down filling amount. S3: Compare the actual fill amount with the preset fill amount. If the actual fill amount is large, reduce the pump flow rate in S2; if the actual fill amount is small, increase the pump flow rate.

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