Plastic film blowing machine film blowing device

Abstract

This utility model discloses a film blowing device for a plastic film blowing machine, including a film blowing machine die head and an air duct. The film blowing machine die head includes a cooling air ring, a main body, and a base. Connectors are attached to the outer sides of both the cooling air ring and the base. A plug is fixedly connected to the open end of the air duct. In this application, the plug is inserted into the second external thread, and the outer seat overlaps the top of the plug. A sealing ring ensures airtightness between the outer seat and the connector. The operator holds the upper part of the plug with one hand to further limit the axial deflection of the plug, while the other hand rotates the pressure sleeve until it simultaneously engages with both the first and second external threads. The horizontal end of the pressure sleeve presses against the top of the outer seat, thus achieving a stable connection of the plug connector and thereby installing and fixing the air duct. This ensures the airtightness and stability of the air duct connection, and subsequent disassembly and assembly of the air duct can be achieved simply by rotating the pressure sleeve, thereby improving the ease of use of the plastic film blowing device.

Description

Technical Field

[0001] This utility model relates to the field of plastic blown film machine technology, and in particular to a blown film device for a plastic blown film machine. Background Technology

[0002] The film blowing device of a plastic blown film machine is the core component of the machine. It is mainly used to extrude molten plastic raw materials through a mold and inflate them into thin film bubbles under the action of gas at a certain pressure. The bubbles are then cooled and shaped to form continuous plastic film products.

[0003] Chinese Patent Publication No. CN210999910U, published on 20200714, discloses a blown film machine die head, which includes a base, a cooling air ring, and an air duct. The base and the cooling air ring are connected by the air duct. Both ends of the air duct are connected to a first connecting seat. A second connecting seat that engages with the first connecting seat is provided on the base and the cooling air ring at the connection point of the air duct. The first connecting seat has an installation port for fixing the air duct, and the second connecting seat has a ventilation port corresponding to the installation port. The second connecting seat has an embedded annular groove inside, and a vertical groove communicating with the embedded annular groove is provided on the second connecting seat. A snap-fit ​​block that can slide into the vertical groove is provided on the first connecting seat near the second connecting seat.

[0004] The existing plastic film blowing machine blowing device improves the connection method between the cooling air ring and the joint on the base and the air duct, thereby ensuring the convenience of independent disassembly and assembly of the air duct. In the actual implementation process, the operator needs to perform forced deformation of multiple sets of clips at the same time, which is relatively inconvenient. The connection method of the air duct can be further optimized. Therefore, it is urgent to propose a corresponding plastic film blowing machine blowing device to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a plastic film blowing machine blowing device to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A plastic blown film machine blowing device includes a blown film machine die head and an air duct. The blown film machine die head includes a cooling air ring, a main body and a base. The cooling air ring and the outer side of the base are both connected to a connector. The open end of the air duct is fixedly connected to a plug. The outer wall of the plug is fixedly connected to an outer seat. The outer seat and the connector are fixedly connected by a pressure sleeve.

[0008] Preferably, a second retaining ring is fixedly connected to the outer wall of the pressure sleeve, and a first retaining ring is fixedly connected to both the cooling air ring and the outer wall of the base.

[0009] Preferably, the inner wall of the pressure sleeve is screwed to the outer wall of the outer seat via an external thread one, and the outer side of the joint is provided with an external thread two that matches the pressure sleeve.

[0010] Preferably, the pressure sleeve has an inverted U-shaped cross-section, and the horizontal end of the pressure sleeve overlaps the top of the outer seat.

[0011] Preferably, a sealing ring is fixedly connected to the bottom of the outer seat, and the bottom of the sealing ring abuts against the top of the vertical end of the connector.

[0012] Preferably, both the first retaining ring and the second retaining ring have a U-shaped structure, the outer wall of the pressure sleeve is integrally formed with the second retaining ring, and the outer wall of the arc-shaped end of the pressure sleeve is provided with rough texture.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0014] 1. In this application, the plug is inserted into the second external thread, and the outer seat overlaps the top of the plug. The sealing ring ensures the airtightness between the outer seat and the connector. The operator holds the upper part of the plug with one hand to further limit the axial deflection of the plug, while the other hand rotates the pressure sleeve until the pressure sleeve is simultaneously screwed into the first and second external threads. The horizontal end of the pressure sleeve is pressed against the top of the outer seat, thereby achieving a stable connection of the plug connector and thus realizing the installation and fixation of the air duct. This ensures the airtightness and stability of the air duct connection. Subsequently, the air duct can be disassembled and assembled simply by rotating the pressure sleeve, thereby improving the convenience of using the plastic blown film machine blowing device.

[0015] 2. In this application, after the pressure sleeve completes the fixing of the plug and connector, the second retaining ring on the outside of the pressure sleeve will be in the position corresponding to the first retaining ring. The first retaining ring and the second retaining ring are connected in series by the cable tie, which can limit the circumferential loosening of the pressure sleeve, thereby further improving the stability of the plastic blown film machine blowing device. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure according to an embodiment of the present utility model is shown;

[0017] Figure 2 A schematic diagram of a connector structure according to an embodiment of the present invention is shown;

[0018] Figure 3 A schematic diagram of a sealing ring structure according to an embodiment of the present invention is shown;

[0019] Figure 4 A schematic diagram of a duct structure according to an embodiment of the present invention is shown.

[0020] Legend:

[0021] 1. Film blowing machine die head; 101. Cooling air ring; 102. Main body; 103. Base; 2. Connector; 3. Snap ring one; 4. Pressure sleeve; 5. Air duct; 6. Plug; 7. Sealing ring; 8. External thread one; 9. Snap ring two; 10. Outer seat; 11. External thread two. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution:

[0024] A plastic film blowing machine blowing device includes a film blowing machine die head 1 and an air duct 5. The film blowing machine die head 1 includes a cooling air ring 101, a main body 102 and a base 103. The cooling air ring 101 and the base 103 are both connected to the outer side of a connector 2. The open end of the air duct 5 is fixedly connected to a plug 6. The outer wall of the plug 6 is fixedly connected to an outer seat 10. The outer seat 10 and the connector 2 are fixedly connected by a pressure sleeve 4.

[0025] Insert plug 6 into the external thread 11. The outer seat 10 will overlap the top of plug 6. The sealing ring 7 ensures the airtightness between the outer seat 10 and the connector 2. The operator holds the upper part of plug 6 with one hand to further limit the axial deflection of plug 6, and rotates the pressure sleeve 4 with the other hand until the pressure sleeve 4 is simultaneously screwed into external thread 8 and external thread 11. The horizontal end of the pressure sleeve 4 is pressed against the top of the outer seat 10, thereby achieving a stable connection between the connector 2 of plug 6 and the air duct 5. This ensures the airtightness and stability of the air duct 5 connection. Subsequently, the air duct 5 can be disassembled and assembled simply by rotating the pressure sleeve 4, thereby improving the convenience of using the plastic blown film machine.

[0026] Specifically, such as Figure 2 and Figure 4 As shown, a retaining ring 2 9 is fixedly connected to the outer wall of the pressure sleeve 4, and a retaining ring 1 3 is fixedly connected to the outer wall of both the cooling air ring 101 and the base 103. After the pressure sleeve 4 completes the fixing of the plug 6 and the connector 2, the retaining ring 2 9 on the outer side of the pressure sleeve 4 will be in the position corresponding to the retaining ring 1 3. The retaining ring 1 3 and the retaining ring 2 9 are connected in series by a cable tie, which can limit the circumferential loosening of the pressure sleeve 4, thereby further improving the stability of the plastic blown film machine blowing device.

[0027] Specifically, such as Figure 2and Figure 3 As shown, the inner wall of the pressure sleeve 4 is screwed to the outer wall of the outer seat 10 via an external thread 8. The outer side of the connector 2 is provided with an external thread 11 that matches the pressure sleeve 4. The cross-section of the pressure sleeve 4 is an inverted U-shaped structure, and the horizontal end of the pressure sleeve 4 overlaps the top of the outer seat 10. The operator holds the upper part of the plug 6 with one hand to further limit the axial deflection of the plug 6, while the other hand rotates the pressure sleeve 4 until the pressure sleeve 4 is screwed with both external thread 8 and external thread 11. The horizontal end of the pressure sleeve 4 is pressed against the top of the outer seat 10, thereby achieving a stable connection between the connector 2 of the plug 6. A sealing ring 7 is fixedly connected to the bottom of the outer seat 10, and the bottom of the sealing ring 7 abuts against the top of the vertical end of the connector 2 to ensure the airtightness between the two. Both the retaining ring 3 and the retaining ring 9 are U-shaped structures. The outer wall of the pressure sleeve 4 and the retaining ring 9 are integrally formed to ensure the connection strength between the two. The outer wall of the arc end of the pressure sleeve 4 is provided with rough texture to facilitate the rotation of the pressure sleeve 4.

[0028] Working principle: The plug 6 is inserted into the external thread 11. The outer seat 10 overlaps the top of the plug 6. The sealing ring 7 ensures airtightness between the outer seat 10 and the connector 2. The operator holds the upper part of the plug 6 with one hand to further limit its axial deflection, while the other hand rotates the pressure sleeve 4 until it simultaneously engages with both the external thread 8 and the external thread 11. The horizontal end of the pressure sleeve 4 presses against the top of the outer seat 10, thus achieving a stable connection between the plug 6 and the connector 2, thereby enabling the air duct 5 to... The installation and fixing ensures the airtightness and stability of the air duct 5 connection. Subsequently, the air duct 5 can be disassembled and assembled simply by rotating the pressure sleeve 4, thereby improving the convenience of using the plastic film blowing machine. After the pressure sleeve 4 fixes the plug 6 and the connector 2, the second retaining ring 9 on the outside of the pressure sleeve 4 will be in the position corresponding to the first retaining ring 3. The first retaining ring 3 and the second retaining ring 9 are connected in series by the cable tie, which can limit the circumferential loosening of the pressure sleeve 4, thereby further improving the stability of the plastic film blowing machine.

[0029] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plastic film blowing machine blowing device, comprising a film blowing machine die head (1) and an air duct (5), wherein the film blowing machine die head (1) comprises a cooling air ring (101), a main body (102) and a base (103), characterized in that, The cooling air ring (101) and the outer side of the base (103) are both connected to a connector (2). The open end of the air duct (5) is fixedly connected to a plug (6). The outer wall of the plug (6) is fixedly connected to an outer seat (10). The outer seat (10) and the connector (2) are fixedly connected by a pressure sleeve (4).

2. The plastic blown film machine film blowing device of claim 1, wherein, The outer wall of the pressure sleeve (4) is fixedly connected with a retaining ring two (9), and the outer walls of the cooling air ring (101) and the base (103) are both fixedly connected with retaining ring one (3).

3. The plastic blown film machine film blowing device of claim 2, wherein, The inner wall of the pressure sleeve (4) is screwed to the outer wall of the outer seat (10) by an external thread (8), and the outer side of the connector (2) is provided with an external thread (11) that fits the pressure sleeve (4).

4. The plastic film blowing device of claim 3, wherein, The cross-section of the pressure sleeve (4) is an inverted U-shaped structure, and the horizontal end of the pressure sleeve (4) overlaps the top of the outer seat (10).

5. The plastic blown film machine film blowing device of claim 4, wherein, The bottom of the outer seat (10) is fixedly connected to a sealing ring (7), and the bottom of the sealing ring (7) abuts against the top of the vertical end of the connector (2).

6. The plastic blown film machine film blowing device of claim 5, wherein, Both the first retaining ring (3) and the second retaining ring (9) are U-shaped structures. The outer wall of the pressure sleeve (4) is integrally formed with the second retaining ring (9), and the outer wall of the arc-shaped end of the pressure sleeve (4) is provided with rough texture.

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