Packaging bag blowing mechanism

Abstract

The utility model relates to the technical field of packaging bag production equipment, in particular to a packaging bag blowing mechanism which comprises a mounting seat, a mounting ring, a limiting ring and a thickness adjusting device, the mounting seat is used for being fixed with a mold core, a servo motor is mounted on the mounting seat, and the mounting ring surrounds the mounting seat. The mounting ring is connected with a rotating shaft of the servo motor through the connecting ring and can be driven by the servo motor, the rotating shaft of the servo motor is sleeved with the connecting ring and connected with the mounting ring, the limiting ring is located on the outer side of the mounting ring, the limiting ring surrounds a flow channel cavity for extruding film bubbles, and the thickness adjusting devices are arranged on the mounting ring at equal intervals. The thickness adjusting device is matched with the limiting ring to adjust the thickness of the film bubble, the thickness of the film bubble can be made to be uniform by arranging the thickness adjusting device to be matched with the limiting ring, the quality of the inflated packaging bag is ensured, meanwhile, the thickness of the film bubble can be controlled by controlling the rotating speed of the servo motor, and packaging bags with different thicknesses can be conveniently produced.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing bag production equipment field especially a packing bag inflation mechanism. BACKGROUND

[0002] Blown film method is a commonly used plastic packing bag manufacturing method, plastic particles are heated to a molten state and extruded along the runner cavity to obtain a tubular film bubble, at this time the film bubble has not been completely cooled, the film bubble is inflated and cooled by directly blowing air to the film bubble to obtain a bag-shaped film, and the strip-shaped film can be made into a packing bag after subsequent processing.

[0003] After the material is extruded from the runner cavity, the material is in a viscous flow state, therefore the thickness of the film bubble is not easy to control, leading to uneven thickness of the bag-shaped film obtained by inflation, and the purpose of the utility model is to provide a new device to solve the above technical problems and ensure the control of the thickness of the film bubble in the inflation process. SUMMARY

[0004] The utility model discloses a packing bag inflation mechanism to solve the problems mentioned in the background art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: including mounting seat, mounting ring, limit ring and thickness adjusting device, the mounting seat is used for with mould core fixed, mounting seat is equipped with servo motor, the mounting ring surrounds the mounting seat, the mounting ring is connected with the servo motor rotating shaft through the connecting ring and can be driven by the servo motor, the connecting ring is sleeved on the servo motor rotating shaft and connected with the mounting ring, the limit ring is located on the outside of the mounting ring, and the limit ring surrounds the runner cavity of extruded film bubble, the thickness adjusting device is set on the mounting ring at equal intervals, and the thickness adjusting device is matched with the limit ring to adjust the thickness of the film bubble.

[0006] In order to optimize the above technical scheme, the following measures are further taken: the thickness adjusting device includes fixed column, moving column, connecting spring and roller, the end of the fixed column is fixed with the mounting ring, the other end of the fixed column and the moving column constitute a moving pair, the connecting spring is connected with the fixed column and the moving column respectively, and the roller is installed on the outer end of the moving column, the roller is used to resist the film bubble, the thickness adjusting device is driven to move by the servo motor at different rotating speeds, and the purpose of adjusting the thickness of the film bubble is realized by cooperating with the limit ring, so that the thickness of the film bubble is uniform.

[0007] As a further improvement of the above technical scheme: a sliding groove is arranged on the fixed column, a sliding sheet is arranged on the moving column, and the sliding sheet is arranged in the sliding groove and can move to realize that the fixed column and the moving column constitute a moving pair along the length direction of the fixed column and the moving column, and the receiving degree of the sliding sheet in the sliding groove can be changed under the action of centrifugal force in the rotating process, so that the purpose of changing the relative position of the roller is realized.

[0008] As a further improvement of the technical solution: further comprising a limiting rod, one end of the limiting rod is connected with the fixed column, the other end forms a limiting block, a limiting plate is formed on the moving column, a limiting hole is formed on the limiting plate and the limiting rod passes through the limiting hole, and the limiting block is abutted against the limiting hole to avoid the moving column from excessively moving outward to cause the film bubble to be too small in thickness.

[0009] As an improvement of the foregoing technical solution: the fixed column and the moving column are directed to the center of the mounting ring in the length direction, so that the extrusion of the thickness adjusting device on the film bubble is consistent during rotation.

[0010] From the above description of the structure of the utility model, compared with the prior art, the utility model has the following advantages:

[0011] The thickness adjusting device and the limiting ring are arranged in the packaging bag blowing mechanism, so that the thickness of the film bubble is uniform, the quality of the packaging bag after blowing is ensured, the thickness of the film bubble can be controlled by controlling the rotating speed of the servo motor, and packaging bags with different thicknesses can be produced. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated herein for purposes of explanation and are not intended to limit the application. In the drawings:

[0013] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0014] Figure 2 It is Figure 1 It is a partial structure schematic view;

[0015] Figure 3 It is a top view structure schematic view of the utility model;

[0016] In the drawing: mounting seat-1, servo motor-101, mounting ring-2, connecting ring-201, limiting ring-3, thickness adjusting device-4, fixed column-401, moving column-402, connecting spring-403, roller-404, sliding groove-405, sliding sheet-406, limiting rod-407, limiting block-408, limiting plate-409, limiting hole-4010 DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0018] Embodiment

[0019] Please refer to Figures 1-3 The utility model provides a kind of packaging bag inflation mechanism, including mounting seat 1, mounting ring 2, limit ring 3 and thickness adjusting device 4, the mounting seat 1 is used to be fixed with mould core, and servo motor 101 is installed on mounting seat 1.

[0020] The mounting ring 2 surrounds mounting seat 1, and the mounting ring 2 is connected with the rotating shaft of the servo motor 101 through the connecting ring 201 and can be driven by the servo motor 101.

[0021] The limit ring 3 is located outside the mounting ring 2, and the limit ring 3 surrounds the flow channel cavity of the extruded film bubble.

[0022] The thickness adjusting device 4 is equidistantly arranged on the mounting ring 2, and the thickness adjusting device 4 cooperates with the limit ring 3 to adjust the thickness of the film bubble.

[0023] In a specific implementation, a polytetrafluoroethylene coating can also be provided on the surface of the roller 404 to improve the anti-adhesion ability of the roller.

[0024] The control method of the utility model is realized by an external controller to achieve automatic control.

[0025] Working principle: install the seat 1 and the limit ring 3 and fix, airflow can be from the gap of thickness adjusting device 4 and blow up the membrane bubble, servo motor 101 rotating shaft drives the installation ring 2 to rotate through the connecting ring 201, when the membrane bubble extrudes from the flow channel cavity, servo motor 101 drives the thickness adjusting device 4 and the limit ring 3 to extrude the both sides of the membrane bubble respectively, make the membrane bubble thickness keep uniform, ensure that the membrane bubble can form the bag-shaped film with uniform thickness under the action of airflow.

[0026] For the thickness adjusting device 4, when servo motor 101 drives the thickness adjusting device 4 to rotate, the moving column 402 will drive the connecting spring 403 to stretch under the action of centrifugal force, when servo motor 101 stops, the connecting spring 403 will drive the moving column 402 to reset, therefore, by controlling the rotating speed of servo motor 101, the distance between the roller 404 and the limit ring 3 can be controlled, so that the roller 404 and the limit ring 3 can extrude the membrane bubble to the specified thickness, that is, the faster the rotating speed of servo motor 101 is, the smaller the thickness of the membrane bubble extruded by the roller 404 and the limit ring 3 is.

[0027] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A packaging bag inflation mechanism characterized by comprising: The application relates to a servo motor driving film bubble thickness adjusting device. The servo motor driving film bubble thickness adjusting device comprises the following parts: A mounting base (1) used for fixing a mold core, wherein a servo motor (101) is mounted on the mounting base (1); A mounting ring (2) surrounding the mounting base (1), wherein the mounting ring (2) is connected with a rotating shaft of the servo motor (101) through a connecting ring (201) and can be driven by the servo motor (101), the connecting ring (201) is sleeved on the rotating shaft of the servo motor (101) and connected with the mounting ring (2); A limiting ring (3) located outside the mounting ring (2) and surrounding a flow channel cavity of an extruded film bubble; 2. A bag inflation mechanism according to claim 1, wherein: Thickness adjusting devices (4) equidistantly arranged on the mounting ring (2), wherein the thickness adjusting devices (4) are matched with the limiting ring (3) and can adjust the thickness of the film bubble. The thickness adjusting device (4) comprises a fixed column (401), a moving column (402), a connecting spring (403) and a roller (404); The fixed column (401) is fixed at one end with the mounting ring (2), and the other end of the fixed column (401) is connected with the moving column (402) to form a moving pair; The connecting spring (403) is connected with the fixed column (401) and the moving column (402) at two ends respectively; 3. A bag inflation mechanism according to claim 2, wherein: The roller (404) is installed at the outer end of the moving column (402), and the roller (404) is used for abutting against the film bubble.

4. A bag inflation mechanism according to any one of claims 2 or 3, wherein: A sliding groove (405) is arranged on the fixed column (401), a sliding sheet (406) is arranged on the moving column (402), the sliding sheet (406) is arranged in the sliding groove (405) and can move to realize that the fixed column (401) and the moving column (402) form a moving pair along the length direction of the fixed column (401) and the moving column (402).

5. A bag inflation mechanism according to any one of claims 2 or 3, wherein: The device further comprises a limiting rod (407), one end of the limiting rod (407) is connected with the fixed column (401), the other end of the limiting rod (407) forms a limiting block (408), a limiting plate (409) is formed on the moving column (402), a limiting hole (4010) is formed on the limiting plate (409) and the limiting rod (407) passes through the limiting hole (4010). The length direction of the fixed column (401) and the moving column (402) points to the center of the mounting ring (2).

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