A film blowing mechanism of a film blowing machine

Abstract

The utility model discloses a kind of blowing film mechanism of blowing film machine, including blowing film machine head, air jet pipe, auxiliary mechanism and spacer, the bottom of blowing film machine head is provided with air pump, the air outlet end of air pump is fixedly sleeved with access pipe, access pipe is fixedly connected in the bottom of blowing film machine head, air jet pipe is located inside blowing film machine head, the top of air jet pipe is fixedly sleeved with nozzle, the bottom of air jet pipe is slidably sleeved with the end of access pipe, auxiliary mechanism is located in the bottom of blowing film machine head.The utility model is connected with blowing film machine head by using the cooperation of interpenetration plate, extrusion ring, limiting component and fixing piece, interpenetration plate makes air jet pipe and blowing film machine head interpenetration, extrusion ring drives first lower pressing ring and second lower pressing ring to press down on connecting column, so that air jet pipe and blowing film machine head are connected and fixed, connecting column is taken off from interpenetration plate, it is favorable to make air jet pipe and blowing film machine head be connected and fixed or separate, so that air jet pipe drives nozzle to be directly taken out from inside blowing film machine head for maintenance.

Description

Technical Field

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

[0002] A blown film machine is a plastic processing device that heats and melts plastic particles and then blows them into a film. A blown film machine usually includes a blown film mechanism.

[0003] Application No. 202420246553.4 discloses a blown film mechanism for a blown film machine, including a blown film head, an extrusion tube, and an installation mechanism. The blown film head has a spacer and an air jet pipe fixedly installed inside, and multiple inlet pipes fixedly installed on the outside of the blown film head. A spiral auger is rotatably installed inside the extrusion tube, and one end of the extrusion tube is movably inserted into the inlet pipe. The installation mechanism is used to fix the extrusion tube and the inlet pipe. The installation mechanism includes an annular plate, a clamping plate, and an L-plate. The clamping plate is fixedly connected to the bottom of the annular plate. A groove is opened at the top of the extrusion tube, and a positioning groove is opened on the outside of the blown film head. The L-plate is movably clamped into the positioning groove. A sliding groove is opened at the top of the annular plate, and a limit rod is fixedly installed in the sliding groove. A pull ring is fixedly connected to the top of the L-plate. The machine also includes an air pump, and multiple nozzles are connected to the top of the air jet pipe.

[0004] The process utilizes an inlet pipe and a spiral auger to guide molten plastic into the extrusion pipe, which then forces the plastic into the blown film head. A spacer sleeve forms a film bubble. Simultaneously, an air pump is activated, introducing high-pressure air into the jet pipe and ejecting it from multiple nozzles. This causes the film bubble to expand, achieving blown film production. The jet pipe is typically connected to the nozzle and the blown film head. During use, the nozzles often become clogged or worn, leading to reduced cooling gas flow. Burrs or deformation at the nozzle outlet can also cause the cooling gas to deviate from its spray direction, necessitating regular nozzle maintenance. However, since the nozzle and jet pipe are usually integrated within the blown film head, operating space can be limited. Therefore, separating the jet pipe from the blown film mechanism is necessary for proper maintenance of the nozzle and jet pipe. Utility Model Content

[0005] The purpose of this utility model is to provide a blown film mechanism for a blown film machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a blown film mechanism for a blown film machine, comprising:

[0007] A blown film head, wherein an air pump is provided at the bottom of the blown film head, and an inlet pipe is fixedly connected to the air outlet end of the air pump, and the inlet pipe is fixedly inserted and connected to the bottom of the blown film head;

[0008] An air jet pipe is located inside the blown film machine head. A nozzle is fixedly sleeved on the top of the air jet pipe, and the bottom of the air jet pipe is slidably sleeved on the end of the inlet pipe.

[0009] An auxiliary mechanism located at the bottom of the blown film head is used to separate the air jet pipe from the blown film head for direct removal and maintenance.

[0010] A spacer sleeve is fixedly connected to the inside of the blown film head, and the air jet pipe is slidably inserted into the top of the spacer sleeve.

[0011] Preferably, the auxiliary mechanism includes:

[0012] An insert plate, which is fixedly connected to the bottom of the jet pipe;

[0013] A through groove is formed at the bottom end of the inner wall of the blown film head, and the insert plate is slidably inserted into the inner cavity of the through groove;

[0014] A fixed cylinder is fixedly connected to the bottom of the blown film head.

[0015] Preferably, the auxiliary mechanism further includes:

[0016] The connecting post has a first sliding groove on its side, and the connecting post is slidably inserted into the inner cavity of the first sliding groove.

[0017] A limiting component is located on the insertion plate and is used to vertically compress and limit the connecting column.

[0018] Preferably, the limiting component includes:

[0019] A compression ring is located outside the inlet tube, and a second groove that mates with the insertion plate is provided on the top of the compression ring.

[0020] A threaded cylinder is threadedly inserted into the interior of a fixed cylinder and is fixedly connected to the top of an extrusion ring.

[0021] Preferably, the limiting component further includes:

[0022] The first pressure ring is fixedly connected to the bottom of the extrusion ring;

[0023] The second pressing ring is fixedly connected to the bottom of the extrusion ring. The second pressing ring is located inside the first pressing ring. The bottoms of both the first pressing ring and the second pressing ring are in contact with the top of the connecting column.

[0024] A fastener located on the extrusion ring, the fastener being used to fix adjacent extrusion rings together.

[0025] Preferably, the fastener includes:

[0026] A fixing plate, which is fixedly connected to the outside of the extrusion ring;

[0027] Locking bolts, the locking bolts being threadedly inserted between adjacent fixing plates.

[0028] The technical effects and advantages of this utility model are as follows:

[0029] This invention utilizes the interlocking plate, extrusion ring, threaded cylinder, fixing cylinder, limiting component, and fixing element to interlock the air jet pipe with the blown film head. The extrusion ring drives the first and second pressing rings to press down on the connecting column, thereby connecting and fixing the air jet pipe with the blown film head. The connecting column can be removed from the interlocking plate, thus releasing the positional limitation of the interlocking plate and the air jet pipe. This facilitates the connection and fixation or separation of the air jet pipe with the blown film head, allowing the air jet pipe to drive the nozzle to be directly removed from the inside of the blown film head for maintenance. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0031] Figure 2 This is a front cross-sectional view of the jet pipe of this utility model.

[0032] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0033] Figure 4 This is a front sectional view of the threaded cylinder section of this utility model.

[0034] In the diagram: 1. Blown film head; 2. Air pump; 3. Air jet pipe; 4. Nozzle; 5. Inlet pipe; 6. Auxiliary mechanism; 61. Insertion plate; 62. Extrusion ring; 63. Threaded cylinder; 64. Fixed cylinder; 65. First lower pressure ring; 66. Second lower pressure ring; 67. Connecting column; 68. Fixed plate; 69. Locking bolt; 7. Spacer. Detailed Implementation

[0035] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] This utility model provides, for example Figure 1-4The image shows a blown film mechanism for a blown film machine.

[0037] Example 1: Includes a blown film head 1, an air jet pipe 3, an auxiliary mechanism 6, and a spacer 7. The blown film head 1 is based on the prior art mentioned in the background. The blown film process of the blown film head 1 is as follows: molten plastic is introduced into the extrusion pipe through the feed pipe, and the auger is driven to rotate by an external drive structure, thereby extruding the plastic into the blown film head 1. It forms a film bubble with the help of the spacer 7. At the same time, the air pump 2 is started to introduce high-pressure air into the air jet pipe 3 and spray it out from multiple nozzles 4, causing the film bubble to expand and realize the blown film. The bottom of the blown film head 1 is equipped with an air pump 2, which is beneficial for supplying air to the inside of the air jet pipe 3. The air outlet end of the air pump 2 is fixedly connected to an inlet pipe 5, and the inlet pipe 5 is connected to the air jet pipe 3. The connection of pipe 3 is equipped with a sealing ring, which facilitates sealing operations. The inlet pipe 5 facilitates connection with the air jet pipe 3. The inlet pipe 5 is fixedly inserted and connected to the bottom of the blown film head 1. The air jet pipe 3 is located inside the blown film head 1. The top of the air jet pipe 3 is fixedly sleeved with a nozzle 4, which facilitates blown film operations. The spacer 7 facilitates covering the air jet pipe 3. The bottom of the air jet pipe 3 is slidably sleeved to the end of the inlet pipe 5. The auxiliary mechanism 6 is located at the bottom of the blown film head 1. The auxiliary mechanism 6 is used to separate the air jet pipe 3 from the blown film head 1 for direct removal and maintenance. The spacer 7 is fixedly connected to the inside of the blown film head 1, and the air jet pipe 3 is slidably inserted into the top of the spacer 7.

[0038] Furthermore, the auxiliary mechanism 6 includes an insert plate 61, a through groove, and a fixed cylinder 64. The insert plate 61 facilitates connection with the blown film head 1 and makes it easy to position the air jet pipe 3 for installation. The fixed cylinder 64 facilitates connection with the threaded cylinder 63 and makes it easy to support the threaded cylinder 63. The air jet pipe 3 is connected to the blown film head 1, and the insert plate 61 is fixedly connected to the bottom of the air jet pipe 3. The through groove is opened at the bottom end of the inner wall of the blown film head 1. The insert plate 61 is slidably inserted into the inner cavity of the through groove. The fixed cylinder 64 is fixedly connected to the bottom of the blown film head 1.

[0039] Furthermore, the auxiliary mechanism 6 also includes a connecting post 67 and a limiting component. The connecting post 67 is convenient to be inserted into the insert plate 61, which facilitates the downward movement of the insert plate 61 to limit and fix the insert plate 61. The side of the insert plate 61 is provided with a first sliding groove, and the connecting post 67 is slidably inserted into the inner cavity of the first sliding groove. The limiting component is located on the insert plate 61 and is used to vertically squeeze and limit the connecting post 67.

[0040] Specifically, the limiting assembly includes a compression ring 62 and a threaded cylinder 63. The compression ring 62 facilitates the movement of the first pressing ring 65 and the second pressing ring 66, making it easy to drive the first pressing ring 65 and the second pressing ring 66. The threaded cylinder 63, the compression ring 62, the first pressing ring 65, and the second pressing ring 66 are all semi-shaped and used in pairs, making it easy to fit and install on the outside of the access pipe 5. The threaded cylinder 63 facilitates connection with the fixed cylinder 64. The compression ring 62 is located outside the access pipe 5, and the top of the compression ring 62 has a second sliding groove that cooperates with the insert plate 61. The threaded cylinder 63 is threadedly inserted into the inside of the fixed cylinder 64 and is fixedly connected to the top of the compression ring 62.

[0041] More specifically, the limiting assembly also includes a first pressing ring 65, a second pressing ring 66, and a fixing member. The first pressing ring 65 and the second pressing ring 66 are beneficial for pressing down and limiting the connecting post 67, which in turn is beneficial for connecting and fixing the insert plate 61. At the same time, it is beneficial for the insert plate 61 to drive the air jet pipe 3 to fit tightly against the bottom end of the inner wall of the blown film head 1. The first pressing ring 65 is fixedly connected to the bottom of the extrusion ring 62, and the second pressing ring 66 is fixedly connected to the bottom of the extrusion ring 62. The second pressing ring 66 is located inside the first pressing ring 65. The bottoms of both the first pressing ring 65 and the second pressing ring 66 are in contact with the top of the connecting post 67. The fixing member is located on the extrusion ring 62 and is used to fix adjacent extrusion rings 62 together.

[0042] When disassembling the jet pipe 3, simply rotate the compression ring 62 to make the threaded cylinder 63 rotate upward, thereby driving the first lower pressure ring 65 and the second lower pressure ring 66 away from the connecting post 67. At this time, the compression limit on the connecting post 67 is released, and then the connecting post 67 is pulled off the insert plate 61, which can push the insert plate 61 to move upward, thereby allowing the jet pipe 3 to extend out of the blown film head 1 for removal and maintenance.

[0043] Example 2: Based on Example 1, the fastener includes a fixing plate 68 and a locking bolt 69. The fixing plate 68 and the locking bolt 69 facilitate the connection and fixation of adjacent extrusion rings 62, so as to install and disassemble the extrusion rings 62. The fixing plate 68 is fixedly connected to the outside of the extrusion ring 62, and the locking bolt 69 is threadedly connected between adjacent fixing plates 68.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A blown film mechanism for a blown film machine, characterized in that, include: A blown film head (1) is provided with an air pump (2) at the bottom of the blown film head (1). An inlet pipe (5) is fixedly connected to the air outlet end of the air pump (2). The inlet pipe (5) is fixedly inserted and connected to the bottom of the blown film head (1). The jet pipe (3) is located inside the blown film head (1). The top of the jet pipe (3) is fixedly sleeved with a nozzle (4), and the bottom of the jet pipe (3) is slidably sleeved with the end of the inlet pipe (5). Auxiliary mechanism (6) is located at the bottom of the blown film head (1). The auxiliary mechanism (6) is used to separate the jet pipe (3) from the blown film head (1) for direct removal and maintenance. The spacer (7) is fixedly connected to the inside of the blown film head (1), and the jet pipe (3) is slidably inserted into the top of the spacer (7).

2. The blown film mechanism of a blown film machine according to claim 1, characterized in that, The auxiliary mechanism (6) includes: An insert plate (61) is fixedly connected to the bottom of the jet pipe (3); A through groove is provided at the bottom of the inner wall of the blown film head (1), and the insert plate (61) is slidably inserted into the inner cavity of the through groove. A fixed cylinder (64) is fixedly connected to the bottom of the blown film head (1).

3. The blown film mechanism of a blown film machine according to claim 2, characterized in that, The auxiliary mechanism (6) also includes: The connecting post (67) has a first sliding groove on the side of the insert plate (61), and the connecting post (67) is slidably inserted into the inner cavity of the first sliding groove. A limiting component is located on the interpenetrating plate (61) and is used to vertically compress and limit the connecting column (67).

4. The blown film mechanism of a blown film machine according to claim 3, characterized in that, The limiting component includes: The compression ring (62) is located outside the access tube (5), and the top of the compression ring (62) is provided with a second sliding groove that cooperates with the insertion plate (61); A threaded cylinder (63) is threadedly inserted into the interior of a fixed cylinder (64) and is fixedly connected to the top of a compression ring (62).

5. The blown film mechanism of a blown film machine according to claim 4, characterized in that, The limiting component also includes: The first pressing ring (65) is fixedly connected to the bottom of the extrusion ring (62); The second pressing ring (66) is fixedly connected to the bottom of the extrusion ring (62). The second pressing ring (66) is located inside the first pressing ring (65). The bottoms of the first pressing ring (65) and the second pressing ring (66) are both in contact with the top of the connecting post (67). A fastener located on the extrusion ring (62) for fixing adjacent extrusion rings (62) together.

6. The blown film mechanism of a blown film machine according to claim 5, characterized in that, The fastener includes: A fixing plate (68) is fixedly connected to the outside of the extrusion ring (62); Locking bolt (69) is threadedly connected between adjacent fixing plates (68).

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