A medical packaging film processing film blowing machine

Abstract

The utility model relates to medical packaging film production field especially, and is particularly a kind of medical packaging film processing is blown film machine, including heating mechanism, heating mechanism side is equipped with membrane outlet mechanism, extrusion film is still included in membrane outlet mechanism top, and further include blowing mechanism. Through the cooling gas flow through horizontal shaft will drive swing strip to carry out wavy swing, so that the knocking rod of swing strip upper end is knocked to V-shaped frame lower side, and immediately the dust and sundries filtered on filter screen are shaken off, and the dust shaken off will gather to the both sides position at V-shaped frame top along the inclined surface of V-shaped frame, immediately avoid dust to block high-efficiency filter, so that the situation of the blown film quality is not good occurs.

Description

Technical Field

[0001] This utility model relates to the field of medical packaging film production, and in particular to a blown film machine for processing medical packaging film. Background Technology

[0002] According to the patent document with publication number CN219028477U, cooling gas is sent into the mold core by a fan. The cooling gas is blown to the filter screen through the air inlet slot. The cooling gas will push the blocking ball and no longer block the air inlet slot. As the blocking ball moves upward, it will hit the filter screen, causing the filter screen to shake and loosen the dust. The blocking ball continues to squeeze the filter screen under the blowing of the cooling gas, causing it to bend. When the blower stops running, the blocking ball falls back to the air inlet head, and the bent part of the filter screen returns to a horizontal position. The dust attached to the filter screen will fall to the outer surface of the air inlet head under the action of inertia.

[0003] The patent document states that when cleaning dust from the filter screen, the entire equipment needs to be started and stopped before the cleaning process can be completed. Since the blowing time of a blown film machine is relatively long, if the filter screen becomes clogged during the operation of the equipment, the internal cooling gas pressure of the film will decrease, which may increase the film wall thickness. At the same time, it will slow down the internal cooling rate of the film, which may affect the production of the entire film. Utility Model Content

[0004] The purpose of this invention is to provide a blown film machine for processing medical packaging films in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A blown film machine for processing medical packaging film includes a heating mechanism, a film extrusion mechanism on one side of the heating mechanism, a film extrusion mechanism at the top of the film extrusion mechanism, and an air blowing mechanism;

[0007] The air blowing mechanism includes an air blowing hood, an air outlet pipe at the center of the upper end of the air blowing hood, a fan fixed at the lower end of the air blowing hood, an air inlet pipe fixed at the end of the fan away from the air blowing hood, a V-shaped frame fixed inside the air blowing hood near the air outlet pipe, a horizontal shaft fixed inside the air blowing hood near the fan, and a swing bar on the outside of the horizontal shaft.

[0008] Preferably, the lower end of the air outlet pipe extends out from the side of the upper end of the air blowing hood, the V-shaped frame has a V-shaped structure, and filter screens are fixed on both inclined surfaces of the V-shaped frame. A high-efficiency filter is fixed inside the air blowing hood above the V-shaped frame.

[0009] Preferably, the swing bar consists of a soft cloth strip, a striking rod, and a collar. The striking rod is fixed to the upper end of the soft cloth strip, the collar is fixed to the lower end of the soft cloth strip, and the collar is placed in the middle of the horizontal axis.

[0010] Preferably, the film ejection mechanism includes a mold shell, a mold core is slidably connected to the inner side of the mold shell, four fixing plates are fixed to the bottom of the mold shell, each fixing plate is fixed to the bottom of the mold shell with a fixing screw, and an adjusting screw is threaded to one end of each fixing plate located on the bottom side of the mold core.

[0011] Preferably, the mold core has an air blowing chamber inside, the top of the mold core has an arc-shaped through groove communicating with the air blowing chamber, and the bottom of the mold core has a round hole communicating with the air blowing chamber, the round hole being connected to the top of the air blowing cover.

[0012] Preferably, the mold core has a perforation at its center for the air pipe to pass through, and the mold shell and the mold core have an extrusion cavity for the blown film material to be extruded.

[0013] Preferably, the heating mechanism includes an extrusion tube, one end of which is fixedly connected to the feed tube of the mold shell, the other end of which is fixedly equipped with an extrusion motor, an extrusion screw is rotatably connected to the center of the extrusion tube, a feed hopper is fixedly fixed to the top of the extrusion tube, and multiple heating rings are fixedly fixed to the outside of the extrusion tube.

[0014] The beneficial effects compared with the existing technology are as follows: the cooling gas flowing through the horizontal axis will drive the swing bar to swing in a wave-like manner, so that the striking bar at the upper end of the swing bar will strike the lower side of the V-shaped frame, thereby shaking off the dust and debris filtered on the filter screen. The shaken dust will gather along the inclined surface of the V-shaped frame to the two sides of the top of the V-shaped frame, thus avoiding dust clogging of the high-efficiency filter and thus preventing poor blown film quality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of a blown film machine for processing medical packaging film according to the present invention;

[0017] Figure 2 This is a side view of a blown film machine for processing medical packaging film according to the present invention;

[0018] Figure 3 yes Figure 2 Sectional view at point AA;

[0019] Figure 4 yes Figure 3 A magnified view of a section at point C;

[0020] Figure 5 yes Figure 3 A magnified view of a section at point D;

[0021] Figure 6 This is a schematic diagram of the V-shaped frame, filter screen, and swing bar structure of a blown film machine for processing medical packaging film according to this utility model;

[0022] Figure 7 This is a schematic diagram of the air inlet pipe structure of a blown film machine for processing medical packaging film according to the present invention;

[0023] Figure 8 This is a schematic diagram of the mold shell structure of a blown film machine for processing medical packaging film according to the present invention;

[0024] Figure 9 This is a schematic diagram of the air outlet pipe and mold core structure of a blown film machine for processing medical packaging film according to the present invention;

[0025] Figure 10 This is a schematic diagram of the mold core structure of a blown film machine for processing medical packaging film according to the present invention.

[0026] The annotations in the attached figures are explained as follows:

[0027] 1. Film ejection mechanism; 2. Heating mechanism; 3. Air blowing mechanism; 4. Film; 11. Mold shell; 12. Film ejection cavity; 13. Mold core; 14. Fixing plate; 15. Fixing screw; 16. Adjusting screw; 17. Air blowing chamber; 21. Extrusion tube; 22. Feed hopper; 23. Extrusion motor; 24. Extrusion screw; 25. Heating ring; 31. Air blowing hood; 32. Air outlet pipe; 33. V-shaped frame; 34. Filter screen; 35. Swing bar; 36. Horizontal shaft; 37. Air inlet pipe; 38. Fan. Detailed Implementation

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. All electrical components mentioned in this document are electrically connected to an external main controller and 220V AC mains power, and the main controller can be a conventionally known device such as a computer that provides control.

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] like Figures 1-10As shown, a blown film machine for processing medical packaging film includes a heating mechanism 2, a film extrusion mechanism 1 on one side of the heating mechanism 2, a film extrusion mechanism 4 extruded from the top of the film extrusion mechanism 1, and a blowing mechanism 3.

[0031] In this embodiment: the blowing mechanism 3 includes a blowing hood 31, an air outlet pipe 32 is provided at the center of the upper end of the blowing hood 31, a fan 38 is fixed at the lower end of the blowing hood 31, an air inlet pipe 37 is fixed at the end of the fan 38 away from the blowing hood 31, a V-shaped frame 33 is fixed inside the blowing hood 31 near the air outlet pipe 32, a horizontal shaft 36 is fixed inside the blowing hood 31 near the fan 38, and a swing bar 35 is provided on the outside of the horizontal shaft 36. The swing bar 35 is composed of a soft cloth strip, a striking rod and a collar, and the striking rod is fixed on the soft cloth strip. The end of the sleeve is fixed to the lower end of the soft cloth strip and is positioned in the middle of the horizontal shaft 36. The lower end of the air outlet pipe 32 passes through the side of the upper end of the air blowing hood 31. The V-shaped frame 33 has a V-shaped structure, and filter screens 34 are fixed on both inclined surfaces of the V-shaped frame 33. A high-efficiency filter is fixed inside the air blowing hood 31 above the V-shaped frame 33. Air is blown into the fan 38 through the air inlet pipe 37. At this time, the cooling gas enters the air blowing hood 31 from the fan 38 and flows upward. The flowing cooling gas passes through the two filter screens 34 and the high-efficiency filter. The extruded film 4 is blown into the film extrusion mechanism 1. Based on the Karman vortex street effect, as the cooling gas flows across the horizontal axis 36, turbulence forms above the axis, causing two asymmetrical vortices to alternately form on either side above the axis 36. These vortices drive the soft fabric strip of the oscillating bar 35 to oscillate in a wave-like pattern. This oscillating fabric strip, in turn, drives the striking rod to continuously strike the lower end of the V-shaped frame 33. During this striking process, the dust filtered from the two filter screens 34 is removed. The dust is shaken off, and the shaken dust and debris will move along the inclined surfaces on both sides of the upper end of the V-shaped frame 33 and be temporarily stored. After the entire blowing process is completed, there is no cooling gas flow inside the blowing hood 31. At this time, the dust and debris located on both sides of the upper end of the blowing hood 31 will fall below the blowing hood 31. Then the blowing hood 31 can be opened to clean the dust and debris, and the two filters 34 can also be replaced. In addition, as the airflow increases, the tapping force and frequency increase synchronously, thereby accelerating the cleaning speed of the filters 34.

[0032] In this embodiment: the film extrusion mechanism 1 includes a mold shell 11, a mold core 13 is slidably connected to the inner side of the mold shell 11, four fixing plates 14 are fixed to the bottom of the mold shell 11, each fixing plate 14 is fixed to the bottom of the mold shell 11 with a fixing screw 15, and an adjusting screw 16 is threaded to one end of each fixing plate 14 located on the bottom side of the mold core 13. An air blowing chamber 17 is opened inside the mold core 13, an arc-shaped through groove communicating with the air blowing chamber 17 is opened at the top of the mold core 13, and a round hole communicating with the air blowing chamber 17 is opened at the bottom of the mold core 13, the round hole abutting the top of the air blowing cover 31. A through hole for the air outlet pipe 32 to pass through is opened at the center of the mold core 13, and a film extrusion chamber 12 for extruding the blown film material is provided between the mold shell 11 and the mold core 13. The blown film material is conveyed upward through the film outlet cavity 12 between the mold shell 11 and the mold core 13, and then extruded from the upper end of the film outlet cavity 12 to form a film 4 of a certain thickness. Subsequently, the cooling gas is sent into the round hole at the bottom of the mold core 13 through the air blowing hood 31. At this time, the cooling gas will flow into the air blowing cavity 17 and flow out through the arc-shaped through groove at the top of the air blowing cavity 17. The cooling gas flowing out from the arc-shaped through groove blows onto the extruded film 4. As the cooling gas continuously flows into the inner wall of the film 4, the cooling gas inside the film 4 will increase and blow the film 4 up. Then, the cooled cooling gas flows in from the upper end of the air outlet pipe 32 and flows downward along the air outlet pipe 32 to the outside of the film 4, thereby completing the blowing and cooling of the film 4.

[0033] In this embodiment: the heating mechanism 2 includes an extrusion tube 21. One end of the extrusion tube 21 is fixedly connected to the feed tube of the mold shell 11, and the other end of the extrusion tube 21 is fixedly provided with an extrusion motor 23. An extrusion screw 24 is rotatably connected to the center of the extrusion tube 21. A feed hopper 22 is fixed to the top of the extrusion tube 21, and multiple heating rings 25 are fixed to the outside of the extrusion tube 21. The extrusion motor 23 drives the extrusion screw 24 to rotate inside the extrusion tube 21. The rotation of the extrusion screw 24 conveys the blown film material falling into the extrusion tube 21 from the feed hopper 22 to the mold shell 11. In addition, during the process of conveying the blown film material along the extrusion tube 21, the multiple heating rings 25 heat the blown film material to melt it and enter the film outlet cavity 12 of the mold shell 11 and the mold core 13.

[0034] Working principle: In use, the blown film material is first fed into the feed hopper 22. Then, the extrusion motor 23 drives the extrusion screw 24 to rotate inside the extrusion tube 21. The rotation of the extrusion screw 24 conveys the blown film material falling from the feed hopper 22 into the extrusion tube 21 to the die shell 11. In addition, during the conveying process of the blown film material along the extrusion tube 21, multiple heating rings 25 heat the blown film material to melt it and enter the film outlet cavity 12 of the die shell 11 and the die core 13. As the melted blown film material continuously flows into the film outlet cavity 12, it will flow upward along the film outlet cavity 12. When the melted blown film material flows out of the upper end of the film outlet cavity 12, it will be extruded to form a cylindrical film 4 of a certain thickness. Then, the cylindrical film 4 is pulled upward. Move it to the corresponding A-frame to press the cylindrical film 4 into a double-layer sheet film 4. At the same time, use the air inlet pipe 37 to blow air into the blower 38. At this time, the cooling gas enters the blower 38 into the blower hood 31 and flows upward. The blower hood 31 sends the cooling gas into the round hole at the bottom of the mold core 13. At this time, the cooling gas will flow into the blower 17 and flow out from the arc-shaped groove at the top of the blower 17. The cooling gas flowing out from the arc-shaped groove blows onto the extruded film 4. As the cooling gas continuously flows into the inner wall of the film 4, the cooling gas in the film 4 will increase and blow the film 4 up. Then, the cooled cooling gas flows in from the top of the outlet pipe 32 and flows down along the outlet pipe 32 to the outside of the film 4, thus completing the blowing and cooling of the film 4.

[0035] Furthermore, based on the principle of the Karman vortex street effect, when the cooling gas flows over the horizontal axis 36, it will create turbulence above the horizontal axis 36, causing two asymmetrical vortices to alternately form on both sides above the horizontal axis 36. These vortices will cause the soft cloth strip of the swing bar 35 to swing in a wave-like manner. The swinging soft cloth strip will cause the striking rod to continuously strike the lower end of the V-shaped frame 33. During the striking process, the dust filtered on the two filter screens 34 will be shaken off. The shaken-off dust and other debris will move along the inclined surface to both sides of the upper end of the V-shaped frame 33 and be temporarily stored. After the entire blowing film is completed, there is no cooling gas flow inside the blowing hood 31. At this time, the dust and debris located on both sides of the upper end of the blowing hood 31 will fall below the blowing hood 31. Then the blowing hood 31 can be opened to clean the dust and debris, and the two filter screens 34 can also be replaced. In addition, as the airflow increases, the striking force and frequency increase synchronously, thereby accelerating the cleaning speed of the filter screens 34.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A blown film extrusion machine for processing medical packaging film, comprising a heating mechanism (2), wherein a film extrusion mechanism (1) is provided on one side of the heating mechanism (2), and a film extrusion mechanism (1) extrudes a thin film (4) from the top of the film extrusion mechanism (1), characterized in that: It also includes an air blowing mechanism (3); The blowing mechanism (3) includes a blowing hood (31), an air outlet pipe (32) is provided at the center of the upper end of the blowing hood (31), a fan (38) is fixed at the lower end of the blowing hood (31), an air inlet pipe (37) is fixed at the end of the fan (38) away from the blowing hood (31), a V-shaped frame (33) is fixed inside the blowing hood (31) near the air outlet pipe (32), a horizontal shaft (36) is fixed inside the blowing hood (31) near the fan (38), and a swing bar (35) is provided on the outside of the horizontal shaft (36).

2. The blown film machine for medical packaging film processing according to claim 1, characterized in that: The lower end of the air outlet pipe (32) extends out from the side of the upper end of the air blowing hood (31). The V-shaped frame (33) has a V-shaped structure, and filter screens (34) are fixed on both inclined surfaces of the V-shaped frame (33). A high-efficiency filter is fixed inside the air blowing hood (31) above the V-shaped frame (33).

3. The blown film machine for medical packaging film processing according to claim 1, characterized in that: The swing bar (35) consists of a soft cloth strip, a striking rod and a collar. The striking rod is fixed to the upper end of the soft cloth strip, and the collar is fixed to the lower end of the soft cloth strip. The collar is placed in the middle position of the horizontal axis (36).

4. The blown film machine for medical packaging film processing according to claim 1, characterized in that: The film dispensing mechanism (1) includes a mold shell (11), a mold core (13) is slidably connected to the inner side of the mold shell (11), and four fixing plates (14) are fixed at the bottom of the mold shell (11). Each fixing plate (14) is fixed to the bottom of the mold shell (11) with a fixing screw (15), and an adjusting screw (16) is threaded to one end of each fixing plate (14) located on the bottom side of the mold core (13).

5. A blown film machine for processing medical packaging film according to claim 4, characterized in that: The mold core (13) has an air blowing chamber (17) inside. The top of the mold core (13) has an arc-shaped through groove that communicates with the air blowing chamber (17), and the bottom of the mold core (13) has a round hole that communicates with the air blowing chamber (17). The round hole is connected to the top of the air blowing cover (31).

6. The blown film machine for medical packaging film processing according to claim 4, characterized in that: The mold core (13) has a perforation at its center for the air outlet pipe (32) to pass through, and the mold shell (11) and the mold core (13) have an extrusion cavity (12) for the extrusion of blown film material.

7. A blown film machine for processing medical packaging film according to claim 4, characterized in that: The heating mechanism (2) includes an extrusion tube (21), one end of which is fixedly connected to the feed tube of the mold shell (11), the other end of which is fixedly provided with an extrusion motor (23), an extrusion screw (24) is rotatably connected to the center of the extrusion tube (21), a feed hopper (22) is fixedly fixed to the top of the extrusion tube (21), and multiple heating rings (25) are fixed to the outside of the extrusion tube (21).

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