Film blowing mechanism of film blowing machine

Abstract

The utility model belongs to the field of film blowing machines, and particularly relates to a film blowing mechanism of a film blowing machine, which comprises a film blowing machine head, and the bottom of the film blowing machine head is fixedly communicated with a connecting pipe; through the arrangement of the detection mechanism, the joint of the connecting pipe and the air inlet pipe can be monitored in real time, the situation that due to gas leakage, gas input into the film blowing machine head is not uniform, and the uniformity of film bubble expansion is affected is avoided, and through the arrangement of the quick disassembly mechanism, workers can disassemble, assemble and maintain annular wind shielding cloth conveniently; interference of external airflow can be prevented and reduced by utilizing annular wind shielding cloth, uneven air volume of the film blowing mechanism caused by fluctuation of the external airflow is avoided, and the problems that when an existing film blowing machine is used, the bottom of a film blowing machine head is generally communicated with a plurality of air inlet pipes, the air inlet pipes are generally manually connected with the film blowing machine head, and the air volume is not uniform are solved. The problem that the expansion uniformity of film bubbles is influenced by different blowing speeds of a plurality of air inlet pipes due to the fact that the air leakage phenomenon occurs at the connecting part due to the unavoidable looseness after long-time use is solved.

Description

Technical Field

[0001] The utility model relates to the field of film blowing machines, in particular to a film blowing mechanism of a film blowing machine. Background Art

[0002] The film blowing machine heats and melts plastic particles and then blows them into thin films. There are many types of film blowing machines, including PE, POF, PVC, etc. The new materials blown out by brand new particles are new materials with uniform color, cleanness, and good bag stretching. The basic working process of the film blowing machine is to add dry polyethylene particles into the lower hopper, and the particles enter the screw from the hopper by their own weight. When the particles come into contact with the bevel of the thread, the rotating bevel surface generates a thrust perpendicular to the bevel surface on the plastic, pushing the plastic particles forward. During the pushing process, due to the friction between the plastic and the screw, the plastic and the barrel, and the collision friction between the particles, and also due to the heating outside the barrel, the plastic gradually melts.

[0003] When an existing film blowing machine is in use, the bottom of the film blowing machine head is usually connected to multiple air inlet pipes, and the air inlet pipes and the film blowing machine head are usually manually connected. After long-term use, they will inevitably become loose, resulting in air leakage at the connection, which in turn causes different wind speeds blown by multiple air inlet pipes, affecting the uniformity of film bubble expansion; therefore, a film blowing mechanism for a film blowing machine is proposed to address the above problems. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, the utility model solves the problem that when the existing film blowing machine is in use, the bottom of the film blowing machine head is usually connected to multiple air inlet pipes, and the air inlet pipes and the film blowing machine head are usually manually connected, which will inevitably become loose after long-term use, resulting in air leakage at the connection, and then causing different wind speeds blown by multiple air inlet pipes, affecting the uniformity of film bubble expansion. The utility model proposes a film blowing mechanism for a film blowing machine.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a film blowing mechanism of a film blowing machine, comprising a film blowing die head, the bottom of the film blowing die head is fixedly connected to a connecting pipe, the surface of the connecting pipe is provided with a detection mechanism, the bottom of the connecting pipe is fixedly connected to an air intake pipe, the top of the film blowing die head is provided with a positioning ring, and the surface of the positioning ring is provided with a quick release mechanism;

[0006] The detection mechanism includes a sealing shell and a twist block. The sealing shell is slidably connected to the surface of the connecting pipe. The twist block is sleeved on the surface of the intake pipe. The sealing shell and the twist block are threadedly connected. A pressure sensor is fixedly installed on the surface of the sealing shell, and one end of the pressure sensor passes through the inner cavity of the sealing shell.

[0007] Preferably, the quick-release mechanism includes a limit frame and a fixed frame, the limit frame is fixedly mounted on the surface of the positioning ring, the fixed frame is fixedly mounted on the surface of the film blowing machine head, the inner cavity of the fixed frame is rotatably connected to a shift rod through an axle pin, the surface of the shift rod is rotatably connected to a hook through an axle pin, and the surface of the hook is engaged with the inner side of the limit frame.

[0008] Preferably, a slide groove is provided in the inner cavity of the sealing shell, and a sliding block for use with the slide groove is fixedly connected to the surface of the connecting pipe.

[0009] By arranging the sliding groove and the slider, the sealing shell can be limited and the stability of the vertical movement of the sealing shell can be improved.

[0010] Preferably, a sealing ring is fixedly connected to the inner cavity of the torsion block, and the inner side of the sealing ring contacts the surface of the air intake pipe.

[0011] Preferably, an annular wind shield is fixedly installed in the inner cavity of the positioning ring, and the annular wind shield is foldable.

[0012] By providing the annular wind shield, the interference of external airflow can be prevented and reduced, thereby avoiding uneven air volume of the film blowing mechanism caused by external airflow fluctuations.

[0013] Preferably, an arc-shaped positioning frame is fixedly installed on the top of the annular windshield cloth, the number of the arc-shaped positioning frames is two, and the material of the arc-shaped positioning frames is stainless steel.

[0014] Preferably, the number of the connecting pipes and the air inlet pipes are both six, and the connecting pipes are annularly symmetrically distributed at the bottom of the film blowing die head.

[0015] Preferably, a fixed sleeve on the surface of the connecting pipe is provided with a solenoid valve, and the number of the solenoid valves is six.

[0016] The utility model is beneficial in that:

[0017] The utility model provides a detection mechanism, which can monitor the connection between the connecting pipe and the air inlet pipe in real time, thereby avoiding gas leakage, resulting in uneven gas input to the film blowing machine head, and affecting the uniformity of film bubble expansion. By providing a quick-release mechanism, it is convenient for staff to disassemble and maintain the annular wind shield, and the annular wind shield can be used to prevent and reduce interference from external airflow, thereby avoiding uneven air volume of the film blowing mechanism caused by external airflow fluctuations. This solves the problem that when the existing film blowing machine is in use, the bottom of the film blowing machine head is usually connected to multiple air inlet pipes, and the air inlet pipe and the film blowing machine head are usually manually connected, which will inevitably become loose after long-term use, resulting in air leakage at the connection, which in turn causes different wind speeds blown by multiple air inlet pipes, affecting the uniformity of film bubble expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a structural cross-sectional view of the connecting pipe, detection mechanism and air intake pipe of the utility model;

[0021] Figure 3 This is a structural exploded cross-sectional view of the connecting pipe, detection mechanism, and air intake pipe of the present invention;

[0022] Figure 4 This is a structural cross-sectional view of the sealing shell and pressure sensor of the present utility model;

[0023] Figure 5 This is a structural diagram of the film blowing die head, quick-release mechanism and annular wind shield cloth of the present invention;

[0024] Figure 6 This is a schematic structural diagram of the quick-release mechanism of the present utility model;

[0025] Figure 7 This is a cross-sectional view of the structure of the annular windshield cloth of the present invention.

[0026] In the figure: 1. Film blowing machine head; 2. Connecting pipe; 3. Detection mechanism; 301. Sealing shell; 302. Twist block; 303. Pressure sensor; 304. Slide groove; 305. Slider; 306. Sealing ring; 4. Air inlet pipe; 5. Positioning ring; 6. Quick release mechanism; 601. Limiting frame; 602. Fixing frame; 603. Push rod; 604. Hook; 7. Annular wind shield; 8. Arc-shaped positioning frame; 9. Solenoid valve. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The following is combined with Figure 1-7 To further explain this application,

[0029] The embodiment of the present application discloses a film blowing mechanism of a film blowing machine. Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 A film blowing mechanism of a film blowing machine includes a film blowing head 1, a connecting pipe 2 is fixedly connected to the bottom of the film blowing head 1, a detection mechanism 3 is provided on the surface of the connecting pipe 2, an air intake pipe 4 is fixedly connected to the bottom of the connecting pipe 2, a positioning ring 5 is provided on the top of the film blowing head 1, and a quick release mechanism 6 is provided on the surface of the positioning ring 5;

[0030] The detection mechanism 3 includes a sealing shell 301 and a twist block 302. The sealing shell 301 is slidably connected to the surface of the connecting pipe 2, and the twist block 302 is sleeved on the surface of the air inlet pipe 4. The sealing shell 301 and the twist block 302 are threadedly connected. A pressure sensor 303 is fixedly installed on the surface of the sealing shell 301, and one end of the pressure sensor 303 passes through the inner cavity of the sealing shell 301; by setting up the detection mechanism 3, the connection between the connecting pipe 2 and the air inlet pipe 4 can be monitored in real time to avoid gas leakage, which will cause uneven gas input into the film blowing machine head 1, thereby affecting the uniformity of the film bubble expansion.

[0031] Reference Figure 1 、 Figure 5 and Figure 6 The quick-release mechanism 6 includes a limiting frame 601 and a fixing frame 602. The limiting frame 601 is fixedly mounted on the surface of the positioning ring 5, and the fixing frame 602 is fixedly mounted on the surface of the film blowing machine head 1. The inner cavity of the fixing frame 602 is rotatably connected to the lever 603 through an axle pin, and the surface of the lever 603 is rotatably connected to the hook 604 through an axle pin, and the surface of the hook 604 is engaged with the inner side of the limiting frame 601; by setting up the quick-release mechanism 6, it is convenient for the staff to disassemble and install the annular wind shield 7, thereby improving the maintenance efficiency of the staff, and the use of the annular wind shield 7 can prevent and reduce the interference of external airflow, thereby avoiding uneven air volume of the film blowing mechanism caused by external airflow fluctuations.

[0032] Reference Figure 2 、 Figure 3 and Figure 4 The inner cavity of the sealing shell 301 is provided with a slide groove 304, and the surface of the connecting pipe 2 is fixedly connected with a slider 305 used in conjunction with the slide groove 304; by setting the slide groove 304 and the slider 305, the sealing shell 301 can be limited, thereby improving the stability of the vertical movement of the sealing shell 301.

[0033] Reference Figure 3 The inner cavity of the twist block 302 is fixedly connected with a sealing ring 306, and the inner side of the sealing ring 306 contacts the surface of the intake pipe 4; by providing the sealing ring 306, the sealing performance of the connection between the twist block 302 and the intake pipe 4 can be improved, avoiding the problem of gas leakage at the connection.

[0034] Reference Figure 1 、 Figure 5 and Figure 7 The inner cavity of the positioning ring 5 is fixedly installed with an annular wind shield 7, which is foldable. By setting the annular wind shield 7, the interference of external airflow can be prevented and reduced, avoiding uneven air volume of the film blowing mechanism caused by external airflow fluctuations.

[0035] Reference Figure 1 and Figure 5 An arc-shaped positioning frame 8 is fixedly installed on the top of the annular windshield 7. There are two arc-shaped positioning frames 8, and the material of the arc-shaped positioning frames 8 is stainless steel. By setting the arc-shaped positioning frame 8, the annular windshield 7 can be fixed, thereby improving the installation efficiency of the annular windshield 7 by the staff.

[0036] Reference Figure 1 、 Figure 2 and Figure 3 There are six connecting pipes 2 and six air inlet pipes 4, and the connecting pipes 2 are symmetrically distributed in a ring at the bottom of the film blowing machine head 1. By setting up evenly distributed connecting pipes 2, the spacing between the six connecting pipes 2 can be ensured to be moderate, avoiding unstable air volume caused by different positions.

[0037] Reference Figure 2 and Figure 3 The surface of the connecting pipe 2 is fixedly sleeved with an electromagnetic valve 9, and the number of the electromagnetic valves 9 is six; by setting the electromagnetic valve 9, the air flow rate in the inner cavity of the connecting pipe 2 can be adjusted so that the air flow rate blown into the inner cavity of the film blowing head 1 is uniform.

[0038] Working principle: When in use, the staff pushes the sealing shell 301 to move upward. When the sealing shell 301 moves upward to the designated position, the air inlet pipe 4 is connected with the connecting pipe 2. After the two are connected, the staff loosens the sealing shell 301. At this time, the sealing shell 301 slides downward under the influence of gravity. When the sealing shell 301 slides downward to the designated position, the staff connects the twist block 302 on the surface of the air inlet pipe 4 with the sealing shell 301. Since the surface of the sealing shell 301 is equipped with a pressure sensor 303, when there is a leak between the air inlet pipe 4 and the connecting pipe 2, the air pressure in the inner cavity of the sealing shell 301 increases, triggering the external alarm device to alarm, reminding The staff performs timely maintenance to avoid uneven gas input into the inner cavity of the film blowing head 1, which affects the uniformity of the film bubble expansion. At the same time, during the use of the film blowing head 1, the staff pulls the annular wind shield 7 upwards. Since the annular wind shield 7 is arranged on the outside of the film, it can prevent and reduce the interference of external airflow, and avoid uneven air volume of the film blowing mechanism caused by external airflow fluctuations. When the staff needs to maintain the annular wind shield 7, they move the lever 603. One end of the lever 603 drives the hook 604 to move when it moves upward. After the hook 604 is separated from the inner cavity of the limit frame 601, the positioning ring 5 and the annular wind shield 7 can be disassembled.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A film blowing mechanism of a film blowing machine, characterized by: The film blowing die comprises a film blowing die head (1), wherein the bottom of the film blowing die head (1) is fixedly connected to a connecting pipe (2), the surface of the connecting pipe (2) is provided with a detection mechanism (3), the bottom of the connecting pipe (2) is fixedly connected to an air intake pipe (4), the top of the film blowing die head (1) is provided with a positioning ring (5), and the surface of the positioning ring (5) is provided with a quick-release mechanism (6); The detection mechanism (3) comprises a sealing shell (301) and a twist block (302); the sealing shell (301) is slidably connected to the surface of the connecting pipe (2); the twist block (302) is sleeved on the surface of the intake pipe (4); the sealing shell (301) and the twist block (302) are threadedly connected; a pressure sensor (303) is fixedly mounted on the surface of the sealing shell (301); one end of the pressure sensor (303) penetrates into the inner cavity of the sealing shell (301).

2. The film blowing mechanism of the film blowing machine according to claim 1, characterized in that: The quick-release mechanism (6) comprises a limiting frame (601) and a fixing frame (602), wherein the limiting frame (601) is fixedly mounted on the surface of the positioning ring (5), and the fixing frame (602) is fixedly mounted on the surface of the film blowing machine head (1). The inner cavity of the fixing frame (602) is rotatably connected to a shifting rod (603) via an axle pin, and the surface of the shifting rod (603) is rotatably connected to a hook (604) via an axle pin, and the surface of the hook (604) is engaged with the inner side of the limiting frame (601).

3. The film blowing mechanism of the film blowing machine according to claim 1, characterized in that: The inner cavity of the sealing shell (301) is provided with a sliding groove (304), and the surface of the connecting pipe (2) is fixedly connected with a sliding block (305) used in conjunction with the sliding groove (304).

4. The film blowing mechanism of the film blowing machine according to claim 1, characterized in that: A sealing ring (306) is fixedly connected to the inner cavity of the twist block (302), and the inner side of the sealing ring (306) contacts the surface of the air intake pipe (4).

5. The film blowing mechanism of the film blowing machine according to claim 1, characterized in that: An annular wind shielding cloth (7) is fixedly installed in the inner cavity of the positioning ring (5), and the annular wind shielding cloth (7) is foldable.

6. The film blowing mechanism of the film blowing machine according to claim 5, characterized in that: An arc-shaped positioning frame (8) is fixedly installed on the top of the annular wind shield (7), the number of the arc-shaped positioning frames (8) is two, and the material of the arc-shaped positioning frames (8) is stainless steel.

7. The film blowing mechanism of the film blowing machine according to claim 1, characterized in that: The number of the connecting pipes (2) and the number of the air inlet pipes (4) are both six, and the connecting pipes (2) are annularly symmetrically distributed at the bottom of the film blowing machine head (1).

8. The film blowing mechanism of the film blowing machine according to claim 1, characterized in that: The surface of the connecting pipe (2) is fixedly sleeved with a solenoid valve (9), and the number of the solenoid valves (9) is six.

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