Adjustable flexible die head of film blowing machine

Abstract

The utility model relates to a film blowing machine, and provides an adjustable flexible die head of a film blowing machine, which comprises a film sleeve, a mouth die arranged in the middle of the film sleeve, an adjusting ring arranged on the outer wall of the mouth die in a surrounding manner, and a plurality of adjusting devices arranged on the film sleeve, the adjusting device is arranged on the outer side of the adjusting ring and distributed in the circumferential direction of the adjusting ring. The adjusting device comprises a sleeve which is horizontally arranged and is connected with the film sleeve, a metal pipe arranged in the sleeve, an ejector rod connected with the metal pipe, and a heating device connected with the metal pipe; the ejector rod penetrates through the sleeve and then abuts against the outer wall of the adjusting ring. According to the adjustable flexible die head of the film blowing machine, the die head of the film blowing machine can be adjusted more efficiently and accurately.

Description

Technical Field

[0001] The utility model relates to the technical field of film blowing machines, in particular to an adjustable flexible die head of a film blowing machine. Background Art

[0002] The film blowing machine heats and melts plastic particles and then blows them into thin films. The die head is one of the important components of the film blowing machine. The melted plastic is squeezed out through the gap in the die head and forms a film after cooling. Therefore, the die head has a great influence on the uniformity of the film thickness.

[0003] In the actual production process, the gap of the die needs to be adjusted according to the production process. The main basis for adjustment is to adjust the gap of the die according to the thickness feedback of the extruded film. It not only adjusts the overall thickness of the film, but also adjusts the width of each part of the die gap separately according to the thickness of different parts of the film. The common adjustment method is manual adjustment, which mainly adjusts the size of the die gap by bolts. However, this adjustment method has low precision and cumbersome operation, which makes the adjustment cycle very long and has a certain impact on production efficiency. Utility Model Content

[0004] The utility model aims to provide an adjustable flexible die head of a film blowing machine, which can more efficiently and accurately adjust the die head of the film blowing machine.

[0005] The embodiments of the utility model are realized through the following technical scheme: the adjustable flexible die head of the film blowing machine of the utility model comprises a film sleeve, a mouth die arranged in the middle of the film sleeve, an adjustment ring arranged around the outer wall of the mouth die, and a plurality of adjustment devices arranged on the film sleeve; the adjustment device is arranged on the outer side of the adjustment ring and distributed along the circumferential direction of the adjustment ring; the adjustment device comprises a sleeve horizontally arranged and connected to the film sleeve, a metal tube arranged in the sleeve, a push rod connected to the metal tube, and a heating device connected to the metal tube; the push rod passes through the sleeve and abuts against the outer wall of the adjustment ring.

[0006] Furthermore, the push rod coincides with the axial direction of the metal tube, and the push rod is arranged toward the center of the adjusting ring.

[0007] Furthermore, the metal tube is a hollow copper tube.

[0008] Furthermore, an electric heating core is provided in the metal tube, and the electric heating core is connected with a wire.

[0009] Furthermore, the side wall of the metal tube is provided with an air guide port.

[0010] Furthermore, one end of the metal tube away from the adjusting ring is an inclined surface, and one end of the metal tube away from the adjusting ring abuts against a sliding block, and the sliding block is threadedly connected with a vertically arranged bolt.

[0011] Furthermore, the outer side wall of the adjustment ring is provided with a plurality of isolation grooves along the circumferential direction, and the isolation grooves and the push rods are alternately arranged.

[0012] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects: the adjustable flexible die head of the film blowing machine of the utility model can drive the gap between different parts of the adjustment ring and the die through the adjustment device when in use, and then adjust the size of the airflow at that place, so as to adjust the thickness of the film blown by the film blowing machine. Specifically, the metal tube is heated by the heating device to expand it, and the expanded metal tube pushes the adjustment ring toward the die through the push rod, so as to reduce the gap between the die and the adjustment ring (conversely, the reverse adjustment can be made by reducing the temperature of the heating device). Through the coordinated and independent adjustment of multiple adjustment devices, the gap between each part of the adjustment ring and the die can be finely adjusted, so as to achieve independent adjustment of the thickness of each part of the film, and the thickness of the film blown out at the beginning is more uniform. And the adjustment method of heating the metal tube can achieve more linear and more subtle adjustment, higher adjustment accuracy, and better automation operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic diagram of the structure of an adjustable flexible die head of a film blowing machine provided in an embodiment of the utility model;

[0015] Figure 2 A schematic diagram of the structure of the membrane sleeve part provided by an embodiment of the utility model;

[0016] Figure 3 A schematic diagram of the structure of the sleeve part provided in an embodiment of the utility model;

[0017] Figure 4 A schematic diagram of the structure inside the casing provided by an embodiment of the utility model;

[0018] Figure 5 A schematic structural diagram of a metal tube portion provided in an embodiment of the utility model.

[0019] Icons: 11-membrane sleeve, 12-die, 13-adjusting ring, 14-isolating groove, 20-adjusting device, 21-sleeve, 22-metal tube, 23-top rod, 24-electric heating core, 25-wire, 26-air guide port, 27-slider, 28-bolt. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example

[0026] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Figure 5 As shown, the adjustable flexible die head of the film blowing machine of this embodiment includes a film sleeve 11, a mouth die 12 arranged in the middle of the film sleeve 11, an adjustment ring 13 arranged around the outer wall of the mouth die 12, and a plurality of adjustment devices 20 arranged on the film sleeve 11; the adjustment device 20 is arranged outside the adjustment ring 13 and distributed along the circumferential direction of the adjustment ring 13; the adjustment device 20 includes a sleeve 21 arranged horizontally and connected to the film sleeve 11, a metal tube 22 arranged in the sleeve 21, a push rod 23 connected to the metal tube 22, and a heating device connected to the metal tube 22; the push rod 23 passes through the sleeve 21 and abuts against the outer wall of the adjustment ring 13. Specifically, when in use, the adjustment device 20 can be used to drive the gap between different parts of the adjustment ring 13 and the mouth die 12, thereby adjusting the size of the airflow there, so as to adjust the thickness of the film blown by the film blowing machine. Specifically, the metal tube 22 is heated by a heating device to expand it. The expanded metal tube 22 pushes the adjustment ring 13 toward the die 12 through the push rod 23, thereby reducing the gap between the die 12 and the adjustment ring 13 (conversely, the gap can be reversed by lowering the temperature of the heating device). Through the coordinated and independent adjustment of multiple adjustment devices 20, the gap between each part of the adjustment ring 13 and the die 12 can be finely adjusted, thereby achieving independent adjustment of the thickness of each part of the film, and the thickness of the blown film at the beginning is more uniform. In addition, the adjustment method of heating the metal tube 22 can achieve more linear and finer adjustments, higher adjustment accuracy, and better automation operation.

[0027] The push rod 23 in this embodiment coincides with the axial direction of the metal tube 22, and the push rod 23 is arranged toward the center of the circle of the adjustment ring 13. The metal tube 22 is a hollow copper tube. An electric heating core 24 is arranged in the metal tube 22, and the electric heating core 24 is connected to a wire 25. Specifically, the copper tube has better thermal conductivity, ductility and elasticity. The electric heating core 24 is arranged inside the copper tube to better heat the copper tube, and the sleeve 21 arranged outside the copper tube can not only better limit the contraction and expansion of the copper tube, but also prevent the heat of the copper tube from affecting each other.

[0028] The side wall of the metal tube 22 in this embodiment is provided with an air guide 26. Specifically, the metal tube 22 can be better cooled by the air guide 26, and an external air duct can be connected to the air guide 26, and then the metal tube 22 can be forced to cool by a fan.

[0029] In this embodiment, the end of the metal tube 22 away from the adjusting ring 13 is an inclined surface, and the end of the metal tube 22 away from the adjusting ring 13 is abutted against a slider 27, and the slider 27 is threadedly connected with a vertically arranged bolt 28. Specifically, by screwing the bolt 28, the slider 27 can be pushed to move up and down. Since the contact surface between the metal tube 22 and the slider 27 is an inclined surface, the slider 27 can push the metal tube 22 to move axially, thereby achieving the purpose of manual adjustment. Under the premise of a failure of the electric heating device, the normal adjustment function can still be guaranteed.

[0030] In this embodiment, the outer wall of the adjustment ring 13 is provided with a plurality of isolation grooves 14 along the circumferential direction, and the isolation grooves 14 and the push rods 23 are arranged alternately. Specifically, by providing the isolation grooves 14, the thickness of the portion of the adjustment ring 13 with the isolation grooves 14 is significantly smaller than the thickness of the remaining portion. In this way, when the push rod 23 pushes the adjustment ring 13, since the thickness of the adjustment ring 13 in the isolation groove 14 portion is relatively thin, it is possible to avoid the moving portion of the adjustment ring 13 from affecting the adjacent portion as much as possible. This allows better independent adjustment of each portion of the adjustment ring 13.

[0031] Rotation speed, the adjustable flexible die head of the film blowing machine of this embodiment can drive the gap between different parts of the adjustment ring 13 and the die 12 through the adjustment device 20 when in use, and then adjust the size of the airflow at that place to adjust the thickness of the film blown by the film blowing machine. Specifically, the metal tube 22 is mainly heated by the heating device to expand it. The expanded metal tube 22 pushes the adjustment ring 13 toward the die 12 through the push rod 23, and then reduces the gap between the die 12 and the adjustment ring 13 (conversely, the reverse adjustment can be made by lowering the temperature of the heating device). Through the coordinated and independent adjustment of multiple adjustment devices 20, the gap between each part of the adjustment ring 13 and the die 12 can be finely adjusted, and the thickness of each part of the film can be independently adjusted, and the thickness of the film blown out at the beginning is more uniform. And the adjustment method of heating the metal tube 22 can achieve more linear and more subtle adjustments, with higher adjustment accuracy, and can also be better automated.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable flexible die head for a film blowing machine, characterized in that: It comprises a film sleeve (11), a die (12) arranged in the middle of the film sleeve (11), an adjustment ring (13) arranged around the outer wall of the die (12), and a plurality of adjustment devices (20) arranged on the film sleeve (11); The adjusting device (20) is arranged on the outside of the adjusting ring (13) and is distributed along the circumferential direction of the adjusting ring (13); the adjusting device (20) comprises a sleeve (21) which is horizontally arranged and connected to the membrane sleeve (11), a metal tube (22) arranged in the sleeve (21), a push rod (23) connected to the metal tube (22), and a heating device connected to the metal tube (22); the push rod (23) passes through the sleeve (21) and abuts against the outer wall of the adjusting ring (13).

2. The adjustable flexible die head of the film blowing machine according to claim 1, characterized in that: The push rod (23) coincides with the axial direction of the metal tube (22), and the push rod (23) is arranged toward the center of the adjustment ring (13).

3. The adjustable flexible die head of the film blowing machine according to claim 1, characterized in that: The metal tube (22) is a hollow copper tube.

4. The adjustable flexible die head of the film blowing machine according to claim 3, characterized in that: An electric heating core (24) is arranged inside the metal tube (22), and a conducting wire (25) is connected to the electric heating core (24).

5. The adjustable flexible die head of the film blowing machine according to claim 3, characterized in that: The side wall of the metal tube (22) is provided with an air guide port (26).

6. The adjustable flexible die head of the film blowing machine according to claim 1, characterized in that: One end of the metal tube (22) away from the adjusting ring (13) is an inclined surface, and one end of the metal tube (22) away from the adjusting ring (13) abuts against a slider (27), and the slider (27) is threadedly connected with a vertically arranged bolt (28).

7. The adjustable flexible die head of the film blowing machine according to claim 1, characterized in that: The outer side wall of the adjustment ring (13) is provided with a plurality of isolation grooves (14) along the circumferential direction, and the isolation grooves (14) and the push rods (23) are arranged alternately.

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