A packaging air column film inflation device

Abstract

The present invention belongs to the technical field of packaging equipment, and in particular relates to a packaging air column film inflation device. The present invention provides a packaging air column film inflation device, comprising a housing, an air pump, an inflation tube, and a pair of feed rollers for feeding, and also comprising a pair of sealing rollers; the air pump is installed inside the housing, and the structure of the air pump includes a piston cylinder, a piston body, an eccentric wheel, and a drive shaft. The piston body is slidably installed in the piston cylinder, and an air inlet check valve and an air outlet check valve are respectively provided at both ends of the piston cylinder. The gas discharged from the two air outlet check valves is converged through a pipeline and discharged through the end of the inflation tube. In the present invention, the air pump and the feed roller use the same motor as the power source. By adjusting the stroke range of the piston body in the air pump and the transmission ratio of the synchronous pulley, the inflation speed and the feed speed of the air column film are fully matched to avoid the problem of insufficient or uneven inflation.

Description

Technical Field

[0001] The present invention belongs to the technical field of packaging equipment, and in particular relates to a packaging air column film inflation device. Background Art

[0002] Air film is a commonly used packaging material in the packaging industry. Considering the convenience of transportation, air film is generally not inflated when it leaves the factory. Customers need to purchase special inflation equipment to inflate it. Only after the inflation, the air film can be used as a packaging material to play a shockproof role.

[0003] The basic structure of conventional air film inflation equipment consists of an air pump, an inflation tube, a feed motor, and feed rollers. During loading, uninflated air film is pulled from a roll and clamped between a pair of feed rollers. Simultaneously, the inflation tube is inserted into an inflation channel located along the edge of the air film. Once the air pump and feed motor are activated, the inflation tube begins to discharge air. Simultaneously, the feed motor drives the feed rollers to rotate, continuously feeding the air film and achieving continuous inflation.

[0004] The existing air column membrane inflation equipment has the following shortcomings: 1. The matching accuracy between the inflation speed of the air pump and the feed speed of the air column membrane is poor, which leads to insufficient or uneven inflation; 2. During inflation, only multiple air columns can be inflated together, and one air column cannot be inflated separately, resulting in insufficient inflation of multiple air columns located at the start and stop connection of the equipment, affecting the shockproof performance of the air columns. Summary of the Invention

[0005] The present invention provides a packaging air column film inflation device to solve the problems raised in the above background technology.

[0006] The technical problem solved by the present invention is achieved by the following technical solution: The present invention provides a packaging air column film inflation device, comprising a housing, an air pump, an inflation tube, and a pair of feeding rollers for feeding the material, and also a pair of sealing rollers;

[0007] The air pump is installed inside the housing. The structure of the air pump includes a piston cylinder, a piston body, an eccentric wheel and a drive shaft. The piston body is slidably installed in the piston cylinder. The eccentric wheel is installed in the piston cylinder and installed on the drive shaft. The axis of the drive shaft is perpendicular to the movement direction of the piston body. The drive shaft is driven by a motor. An inlet check valve and an outlet check valve are respectively provided at both ends of the piston cylinder. The gas discharged from the two outlet check valves is converged through the pipeline and discharged through the end of the inflation tube;

[0008] The end of the drive shaft extends to the outside of the piston cylinder, and the end of the drive shaft is connected to the rotating shaft of the feeding roller through a pair of synchronous pulleys and a belt;

[0009] The inflation tube is clamped between a pair of feeding rollers, and the end of the inflation tube is located between the feeding roller and the sealing roller;

[0010] The outer surface of the sealing roller is a cylindrical surface.

[0011] As a further technical solution, the eccentric wheel includes an outer ring and an inner ring, wherein the outer ring is connected to the outer side of the inner ring through a spline, and the inner ring is connected to the drive shaft through a flat key.

[0012] As a further technical solution, the packaging air column film inflation equipment also includes heat sealing rollers arranged in pairs, the heat sealing rollers are located between the feeding roller and the sealing roller, and at the same time, the end of the inflation tube is located between the sealing roller and the heat sealing roller.

[0013] As a further technical solution, the sealing roller is mounted on a wheel frame, which is connected to a lead screw, which is threadedly connected to the housing. The distance between the sealing roller and the heat sealing roller can be adjusted by turning the lead screw.

[0014] The beneficial effects of the present invention are:

[0015] 1. In the present invention, the air pump and feed roller utilize the same motor as their power source. By adjusting the stroke range of the air pump piston and the transmission ratio of the synchronous pulley, the inflation speed and feed speed can be absolutely synchronized, thereby fully ensuring the matching accuracy between the inflation speed and the feed speed of the air column membrane, and avoiding the problems of insufficient or uneven inflation. Furthermore, the present invention utilizes an eccentrically driven air pump. By adjusting the eccentricity of the eccentric, the amount of air pumped in a single stroke of the air pump piston can be equal to the amount of air required to fill a single air column, thereby achieving individual inflation of each air column.

[0016] 2. The present invention adds a pair of sealing rollers on the basis of the existing technology. Under the pressing action of the sealing rollers, the inflation airway at the edge of the air column membrane is blocked, so that the air column membrane between the sealing roller and the heat sealing roller is inflated, preventing the gas in the inflation airway of the air column membrane from leaking deeper into the airway, thereby further eliminating the problem of insufficient or uneven inflation.

[0017] 2. By adjusting the spacing between the sealing and heat-sealing rollers to equal the width of an air column, the air columns on the air column film are inflated one by one, significantly reducing the number of under-inflated air columns at the start-up and shutdown transitions of the equipment. Furthermore, adjusting the spacing between the sealing and heat-sealing rollers can accommodate various specifications of air column films with varying air column widths. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 yes Figure 1 Right view of;

[0020] Figure 3 yes Figure 2 Schematic diagram of the structure after the wheel frame and lead screw are added;

[0021] Figure 4 is Figure 2 The schematic diagram of the structure after the lead screw and wheel frame are added to the basis;

[0022] Figure 5 This is a diagram of the positional relationship between the inflation tube and the heat sealing roller;

[0023] Figure 6 It is another schematic diagram of the transmission mechanism between the drive shaft and the feed roller rotating shaft.

[0024] In the figure: 1. Motor; 2. Air pump; 3. Synchronous pulley; 4. Belt; 5. Sealing roller; 6. Housing; 7. Air column membrane; 8. Inflating tube; 9. Heat sealing roller; 10. Feed roller; 11. Inlet check valve; 12. Outlet check valve; 13. Piston cylinder; 14. Piston body; 15. Outer ring; 16. Inner ring; 17. Drive shaft; 18. Screw; 19. Wheel frame; 20. Drive wheel; 21. Pulley; 22. Short pin. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] like Figure 1 As shown, this embodiment includes a housing 6, an air pump 2, an air filling tube 8, and feeding rollers 10 arranged in pairs for feeding. The above is a common structure in the prior art and will not be described in detail here.

[0027] like Figure 1 and Figure 2 As shown, the present invention also includes a pair of sealing rollers 5, each having a cylindrical outer surface. Under the pressure of the sealing rollers 5, the inflation channels at the edges of the air column membrane 7 are blocked, allowing the air column membrane 7 between the sealing rollers 5 and the heat-sealing roller 9 to inflate. This prevents gas in the inflation channels of the air column membrane 7 from leaking deeper into the channels, further eliminating the problem of insufficient or uneven inflation.

[0028] like Figure 1 and Figure 3As shown, the air pump 2 is installed inside the housing 6. The structure of the air pump 2 includes a piston cylinder 13, a piston body 14, an eccentric wheel and a drive shaft 17. The piston body 14 is slidably installed in the piston cylinder 13. The eccentric wheel is installed in the piston cylinder 13 and is installed on the drive shaft 17. The axis of the drive shaft 17 is perpendicular to the movement direction of the piston body 14. The drive shaft 17 is driven by the motor 1. An inlet check valve 11 and an outlet check valve 12 are respectively provided at both ends of the piston cylinder 13. The gas discharged from the two outlet check valves 12 is converged through the pipeline and discharged through the end of the inflation pipe 8. The present invention adopts an air pump 2 driven by an eccentric wheel. By adjusting the eccentric distance of the eccentric wheel, the pumping amount of the piston body 14 in the air pump 2 in a one-way stroke can be made equal to the inflation amount required for a single air column, thereby achieving one-by-one inflation of a single air column.

[0029] The distal end of the drive shaft 17 extends beyond the exterior of the piston cylinder 13 and is connected to the rotating shaft of the feed roller 10 via a pair of synchronous pulleys 3 and a belt 4. In the present invention, the air pump 2 and the feed roller 10 utilize the same motor 1 as their power source. By adjusting the stroke range of the piston body 14 in the air pump 2 and the transmission ratio of the synchronous pulley 3, the inflation speed and the feed speed can be absolutely synchronized, thereby fully ensuring the matching accuracy between the inflation speed and the feed speed of the air column membrane 7 and avoiding problems such as insufficient or uneven inflation.

[0030] like Figure 4 As shown, the inflation tube 8 is sandwiched between a pair of feed rollers 10, with the distal end of the inflation tube 8 positioned between the feed rollers 10 and the sealing roller 5. The sealing roller 5 is mounted on a roller frame 19, to which a lead screw 18 is connected. The lead screw 18 is threadedly connected to the housing 6. Turning the lead screw 18 adjusts the distance between the sealing roller 5 and the heat-sealing roller 9. By adjusting the distance between the sealing roller 5 and the heat-sealing roller 9 to equal the width of an air column, the air columns on the air column membrane 7 are inflated one by one, significantly reducing the number of underinflated air columns at the start-up and shutdown transitions of the equipment. Furthermore, adjusting the distance between the sealing roller 5 and the heat-sealing roller 9 accommodates various air column membranes 7 with varying widths.

[0031] like Figure 3 As shown in the figure, as a further technical solution, the eccentric wheel comprises an outer ring 15 and an inner ring 16. The outer ring 15 is connected to the outer side of the inner ring 16 via a spline, and the inner ring 16 is connected to the drive shaft 17 via a flat key. The purpose of setting the eccentric wheel as a split structure is to adjust the eccentricity of the eccentric wheel, thereby adjusting the pumping speed under the condition of constant speed of the drive shaft 17. For this purpose, the spline fit can be replaced with other structures that can achieve relative rotation and fixation of the outer ring 15 and the inner ring 16.

[0032] like Figure 2 or Figure 4 As shown, as a further technical solution, the packaging air column film 7 inflation device also includes a pair of heat-sealing rollers 9, which are located between the feed roller 10 and the sealing roller 5. At the same time, the end of the inflation tube 8 is located between the sealing roller 5 and the heat-sealing roller 9. Without the heat-sealing roller 9, the present invention can only inflate the air column film 7 equipped with an air film valve. After the sealing roller 5 is installed, the inflated air column can be sealed by heat sealing. Therefore, the provision of the sealing roller 5 can improve the applicability of the present invention to a variety of air column films 7.

[0033] like Figure 6 As shown, in order to make the pumping rhythm consistent with the feeding rhythm of the air column membrane 7, the transmission mechanism between the driving shaft 17 and the rotating shaft of the feeding roller 10 can be further optimized, that is, Figure 1 A paddle wheel 21 mechanism is added to the synchronous pulley 3 transmission mechanism shown. The paddle wheel 21 mechanism and the synchronous pulley 3 transmission mechanism are connected in series to form a transmission chain. The paddle wheel 21 mechanism includes a drive wheel 20 and a paddle wheel 21. The drive wheel 20 is mounted on the drive shaft 17. A short pin 22 is fixed to the edge of the drive wheel 20. The paddle wheel 21 is coaxially mounted with a synchronous pulley 3. A radial slideway that matches the short pin 22 is machined on the paddle wheel 21. The drive wheel 20 rotates under the drive shaft 17 and converts its own continuous rotational motion into intermittent rotational motion of the paddle wheel 21 through the cooperation of the short pin 22 and the radial slideway. The intermittent rotational motion of the paddle wheel 21 is converted into intermittent rotational motion of the feed roller 10 through the synchronous pulley 3 transmission mechanism. The intermittent rotational motion of the feed roller 10 causes the air column membrane 7 to be fed step by step, inflating the air columns one by one, so that the pumping rhythm is consistent with the feeding rhythm of the air column membrane 7.

Claims

1. A packaging air column film (7) inflation device, comprising a housing (6), an air pump (2), an inflation tube (8), and a pair of feeding rollers (10) for feeding, characterized in that: It also includes sealing rollers (5) arranged in pairs; The air pump (2) is installed inside the housing (6). The structure of the air pump (2) includes a piston cylinder (13), a piston body (14), an eccentric wheel and a drive shaft (17). The piston body (14) is slidably installed in the piston cylinder (13). The eccentric wheel is installed in the piston cylinder (13) and is installed on the drive shaft (17). The axis of the drive shaft (17) is perpendicular to the movement direction of the piston body (14). The drive shaft (17) is driven by a motor (1). An inlet check valve (11) and an outlet check valve (12) are respectively provided at both ends of the piston cylinder (13). The gas discharged from the two outlet check valves (12) is discharged through the end of the inflation pipe (8) after being converged through the pipeline. The end of the drive shaft (17) extends outward from the piston cylinder (13), and the end of the drive shaft (17) is connected to the rotating shaft of the feed roller (10) through a pair of synchronous pulleys (3) and a belt (4); The inflation tube (8) is clamped between a pair of feeding rollers (10), and the end of the inflation tube (8) is located between the feeding roller (10) and the sealing roller (5); The outer surface of the sealing roller (5) is a cylindrical surface; The eccentric wheel comprises an outer ring (15) and an inner ring (16), wherein the outer ring (15) is connected to the outer side of the inner ring (16) through a spline, and the inner ring (16) is connected to the drive shaft (17) through a flat key; The packaging air column film (7) inflation device further comprises heat sealing rollers (9) arranged in pairs, the heat sealing rollers (9) being located between the feeding roller (10) and the sealing roller (5), and the end of the inflation tube (8) being located between the sealing roller (5) and the heat sealing roller (9); The sealing roller (5) is mounted on a wheel frame (19), the wheel frame (19) is connected to a lead screw (18), and the lead screw (18) is connected to the housing (6) through a thread. By turning the lead screw (18), the distance between the sealing roller (5) and the heat sealing roller (9) can be adjusted.

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