A pipe uniform heating film blowing machine die mechanism

Abstract

The utility model relates to the technical field of blown film machine, specifically disclose a blown film machine die mechanism of pipeline even heating, including installation chassis, its surface is provided with opening, the lower extreme fixed inlet pipe orifice of installation chassis, the upper surface fixed connection of installation chassis has inner mould body, the upper surface of installation chassis is provided with limit bottom plate, the upper surface fixed with outer mould body of limit bottom plate, the upper extreme fixed connection of outer mould body has cooling disc, the side surface fixed connection of outer mould body has feeding opening. The blown film machine die mechanism of pipeline even heating, the filter screen cover of inner mould body can filter the impurity in plastic melt, avoid the film to appear spot, hole and so on blemish, annular auxiliary heating plate can carry out 360 even heating to outer mould body, cooperate annular design of feeding slot, ensure that melt flowability is consistent, effectively reduce the problem that film is locally too thick or too thin, guarantee film quality.

Description

Technical Field

[0001] This utility model relates to the field of blown film machine technology, specifically a blown film machine die head mechanism with uniform pipeline heating. Background Technology

[0002] A blown film extruder is a device that heats and melts plastic particles and then blows them into a thin film. It is widely used in the plastics processing industry. Plastic particles such as polyethylene and polypropylene enter the hopper of the blown film extruder and are pushed by the rotating screw of the extruder to melt into a plastic melt at high temperature. The melt is extruded into the die head to form a tubular film preform, which is then inflated under air pressure. After cooling, traction, and winding, a plastic film is finally formed. The extruder consists of a screw, barrel, hopper, reducer, and drive motor. It is used to melt and extrude plastic particles. The die head and the die head are also important components. The die head acts like a mold, shaping the plastic melt into a tubular film preform. The design of the die head affects the thickness uniformity and surface quality of the film.

[0003] In existing blown film machines, the die heads are often connected to each other using bolts. Since malfunctions are inevitable during the use of the die heads, they need to be disassembled and repaired. However, disassembly and reassembly using bolts is cumbersome and requires tools, which affects the efficiency of maintenance work. Utility Model Content

[0004] The purpose of this invention is to provide a blown film machine die head mechanism with uniform pipeline heating, in order to solve the problem mentioned in the background art that the connection and disassembly by bolt installation is cumbersome and requires tools, which affects the efficiency of maintenance work.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a blown film machine die head mechanism with uniform pipeline heating, comprising a mounting base with an opening on its surface, an air inlet fixed to the lower end of the mounting base, an inner die body fixedly connected to the upper surface of the mounting base, a limiting base plate provided on the upper surface of the mounting base, an outer die body fixed to the upper surface of the limiting base plate, a cooling plate fixedly connected to the upper end of the outer die body, a feeding opening fixedly connected to the side surface of the outer die body, a feeding slot provided on the inner wall of the outer die body, a groove provided on the lower outer surface of the outer die body, and an auxiliary heating plate fixedly connected to the inner wall of the groove of the outer die body, two grooves provided on the upper surface of the mounting base, a positioning column provided on the inner wall of the groove of the mounting base, an adjustment slot provided on the lower side surface of the positioning column, a transmission screw installed through the side surface of the mounting base, a pressing slider provided on the inner wall of the groove of the mounting base, and a linkage pressing mechanism provided between the mounting base and the positioning column.

[0006] Preferably, the upper surface of the inner mold body is provided with a filter screen cover, the limiting base plate is a ring design, and the limiting base plate and the outer mold body are respectively connected to the mounting base.

[0007] Using the above technical solution, a small amount of impurities may be mixed into the plastic melt during the process of being transported to the inner mold body. The filter cover can filter the melt to prevent impurities from entering the subsequent film-forming process, reduce defects on the film surface, and ensure the surface smoothness and structural uniformity of the film. It is especially suitable for food packaging, medical product packaging and other scenarios where high film purity is required.

[0008] Preferably, the feeding opening is connected to the feeding slot, the upper end of the feeding slot is annular, and the lower end of the feeding slot penetrates the inner wall of the outer mold body, and the auxiliary heating plate is annular.

[0009] Using the above technical solution, after the plastic melt is conveyed from the extruder to the feed opening, it can directly enter the feeding slot through the connecting structure without passing through other turning channels. This reduces dead zones where the melt will stagnate during the conveying process, lowers the risk of degradation caused by the melt staying for a long time, and avoids waste of raw materials.

[0010] Preferably, the mounting base and the positioning column are slidably connected, the upper inner wall of the adjustment slot is inclined, the transmission screw is rotatably connected to the mounting base, and the transmission screw is threadedly connected to the extrusion slider. The extrusion slider is slidably connected to the mounting base, and the side surface of the extrusion slider is arc-shaped.

[0011] By adopting the above technical solution, during the assembly or maintenance of the mold head, it may be necessary to adjust the height or horizontal position of the positioning column. The sliding connection allows the positioning column to slide flexibly along the groove of the mounting base, and the position adjustment can be completed without disassembly, improving assembly flexibility and maintenance convenience.

[0012] Preferably, the linkage pressing mechanism includes a fixed upright, which is fixedly connected to the inner wall of the mounting base groove. A linkage slider is fixedly connected to the upper end of the fixed upright, and an adjusting arm is provided on both sides of the linkage slider. A pressing block is provided at one end of the adjusting arm.

[0013] Using the above technical solution, the fixed upright provides fixed support for the entire mechanism, the linkage slider can transmit the displacement of the positioning column, and the adjusting arm converts the linear displacement of the linkage slider into the lateral displacement of the pressing block through the lever principle, so that the pressing block extends from the side surface of the positioning column and presses the outer mold body or the limiting base plate. Multiple components work together to form a stable pressing force, preventing the outer mold body from loosening or shifting during operation.

[0014] Preferably, the fixed pole is L-shaped, and the fixed pole and the positioning column are slidably connected, and a spring is connected between the fixed pole and the positioning column.

[0015] Using the above technical solution, the groove of the mounting base needs to accommodate components such as positioning columns and extrusion sliders at the same time, and the space is relatively compact. The L-shaped design allows one end of the fixing rod to be fixed to the inner wall of the mounting base groove, and the other end to extend upward to the inner side of the positioning column. It does not require occupying too much horizontal space, cleverly adapts to the narrow installation environment, optimizes the overall structural layout of the mold head, and avoids interference between components.

[0016] Preferably, the linkage slider and the positioning column are slidably connected, the linkage slider and the adjusting arm are rotatably connected, and the adjusting arm and the pressing block are rotatably connected. The pressing block penetrates the side surface of the positioning column and is slidably connected to the positioning column. The lower surface of the pressing block is provided with an anti-slip rubber strip.

[0017] Using the above technical solution, when the positioning column slides down, it will drive the linkage slider to move down synchronously along the positioning column. The downward movement of the linkage slider is connected with the rotation of the adjusting arm, which pushes the adjusting arm to rotate around the connection point, thereby driving the pressing block to extend laterally, ensuring that the pressing action is synchronous and smooth.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the blown film machine die head mechanism with uniform heating of the pipeline: 1. The filter cover of the inner mold body can filter impurities in the plastic melt, avoiding defects such as spots and holes in the film. The ring auxiliary heating plate can heat the outer mold body evenly in 360°. Combined with the ring design of the feeding groove, it ensures consistent melt flow, effectively reduces the problem of local film thickness or thinness, and ensures film quality. 2. Through the cooperation of the transmission screw, the extrusion slider and the linkage pressing mechanism, the outer mold body can be quickly fixed and disassembled without the need for bolts. When the transmission screw is rotated in the reverse direction, the spring between the fixed column and the positioning column can drive the parts to automatically reset, which greatly reduces the difficulty of maintenance and operation and improves work efficiency. 3. The self-locking characteristic of the threaded connection allows the extrusion slider to maintain a stable pressed state. The anti-slip rubber strip on the lower surface of the pressing block can increase friction and prevent the outer mold body from loosening due to equipment vibration. The sliding connection between the positioning column and the mounting base can also buffer vibration impact and extend the service life of the components. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the connection between the mounting base and the limiting base plate of this utility model; Figure 2 This is a three-dimensional structural diagram of the connection between the outer mold body and the cooling plate of this utility model; Figure 3 This is a three-dimensional structural diagram of the connection between the feed opening and the feeding slot of this utility model; Figure 4 This is a three-dimensional structural diagram of the connection between the outer mold body and the auxiliary heating plate of this utility model; Figure 5 This is a three-dimensional structural diagram of the connection between the positioning column and the pressing block of this utility model; Figure 6 This is a three-dimensional structural diagram of the connection between the adjusting arm and the pressing block of this utility model.

[0020] In the diagram: 1. Mounting base; 2. Air inlet; 3. Inner mold body; 4. Limiting base plate; 5. Outer mold body; 6. Cooling plate; 7. Feed opening; 8. Feeding slot; 9. Auxiliary heating plate; 10. Positioning column; 11. Adjustment slot; 12. Transmission screw; 13. Extrusion slider; 14. Fixed column; 15. Linkage slider; 16. Adjustment arm; 17. Pressing block. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-6 This utility model provides a technical solution: a blown film machine die head mechanism with uniform pipeline heating, including a mounting base 1, an air inlet 2, an inner mold body 3, a limiting base plate 4, an outer mold body 5, a cooling plate 6, a feeding opening 7, a feeding slot 8, an auxiliary heating plate 9, a positioning column 10, an adjusting slot 11, a transmission screw 12, an extrusion slider 13, a fixed column 14, a linkage slider 15, an adjusting rotating arm 16, and a pressing block 17. The mounting base 1 has an opening on its surface, and the lower end of the mounting base 1 is fixed with an air inlet 2. The upper surface of the inner mold body 3 is provided with... The inner mold body 3 has a filter screen cover, a ring-shaped limiting base plate 4, and the limiting base plate 4 and the outer mold body 5 are respectively connected to the mounting base 1. The feed opening 7 is connected to the feeding slot 8. The upper end of the feeding slot 8 is a ring-shaped design, and the lower end of the feeding slot 8 penetrates the inner wall of the outer mold body 5. The auxiliary heating plate 9 is a ring-shaped design. The plastic melt enters from the feed opening 7 and is directionally transported to the interior of the outer mold body 5 through the connected feeding slot 8. During this process, the filter screen cover on the upper surface of the inner mold body 3 filters the melt, intercepts incompletely melted particles or impurities, and prevents them from clogging the flow channel or affecting the film quality.

[0023] An inner mold body 3 is fixedly connected to the upper surface of the mounting base 1. A limiting base plate 4 is provided on the upper surface of the mounting base 1. An outer mold body 5 is fixedly connected to the upper surface of the limiting base plate 4. A cooling plate 6 is fixedly connected to the upper end of the outer mold body 5. A feed opening 7 is fixedly connected to the side surface of the outer mold body 5. A feeding slot 8 is opened on the inner wall of the outer mold body 5. A groove is provided on the lower outer surface of the outer mold body 5, and an auxiliary heating plate 9 is fixedly connected to the inner wall of the groove of the outer mold body 5. The mounting base 1 and the positioning column 10 form a sliding connection, and the adjusting slot is adjusted. The upper inner wall of 11 is inclined. The transmission screw 12 and the mounting base 1 are rotatably connected. The transmission screw 12 and the extrusion slider 13 are threadedly connected. The extrusion slider 13 and the mounting base 1 are slidably connected. The side surface of the extrusion slider 13 is arc-shaped. The annular auxiliary heating plate 9 in the groove at the lower end of the outer mold body 5 is activated to uniformly heat the outer mold body 5 in a circumferential direction, maintaining the stable fluidity of the melt. The annular structure at the upper end of the feeding slot 8 allows the melt to gradually form a shape that fits the tubular film preform, preparing for subsequent film formation.

[0024] The upper surface of the mounting base 1 has two grooves, and the inner wall of the groove of the mounting base 1 has a positioning column 10. The lower side surface of the positioning column 10 has an adjustment slot 11. The linkage pressing mechanism includes a fixed rod 14, which is fixedly connected to the inner wall of the groove of the mounting base 1. The upper end of the fixed rod 14 is fixedly connected to a linkage slider 15. Both sides of the linkage slider 15 are provided with adjustment arms 16. One end of the adjustment arm 16 is provided with a pressing block 17. Rotating the transmission screw 12 on the side surface of the mounting base 1 converts the rotational motion into linear motion through its threaded connection with the extrusion slider 13, pushing the extrusion slider 13 to slide along the groove of the mounting base 1. The extrusion slider 13 is embedded in the adjustment slot 11 of the positioning column 10, causing the positioning column 10 to slide downward, triggering the linkage pressing mechanism.

[0025] A transmission screw 12 is installed through the side surface of the mounting base 1. A pressing slider 13 is provided on the inner wall of the groove of the mounting base 1. A linkage pressing mechanism is provided between the mounting base 1 and the positioning column 10. The fixed column 14 is L-shaped and is slidably connected to the positioning column 10. A spring is connected between the fixed column 14 and the positioning column 10. The linkage slider 15 is slidably connected to the positioning column 10 and is rotatably connected to the adjusting arm 16. The adjusting arm 16 is connected to the pressing block 17. A rotating connection is formed, with the pressing block 17 penetrating the side surface of the positioning column 10, and the pressing block 17 and the positioning column 10 forming a sliding connection. The lower surface of the pressing block 17 is provided with an anti-slip rubber strip. When the positioning column 10 slides down, the linkage slider 15 on the fixed rod 14 moves synchronously. By adjusting the rotation of the rotating arm 16, the pressing block 17 is pushed to penetrate the side surface of the positioning column 10 and press against the outer mold body 5. When disassembling, the transmission screw 12 is rotated in the opposite direction, the spring pulls the positioning column 10 to reset, the pressing block 17 is retracted, and the fixed state is released.

[0026] Working principle: When using the blown film machine die head mechanism with uniform heating via this pipeline, the plastic melt enters from the feed opening 7, is conveyed through the feeding slot 8, the filter cover of the inner mold body 3 filters impurities, and the annular auxiliary heating plate 9 of the outer mold body 5 uniformly heats the melt to ensure fluidity. Rotating the transmission screw 12 pushes the extrusion slider 13 to slide along the mounting base 1, embedding it into the adjustment slot 11 of the positioning column 10 and causing it to move downward. The positioning column 10 slides down, causing the linkage slider 15 to move. By adjusting the rotating arm 16, the pressing block 17 is pushed out to press the outer mold body 5. The thread self-locking maintains stability. When disassembling, rotating the transmission screw 12 in the opposite direction causes the spring between the fixed column 14 and the positioning column 10 to reset the components, and the pressing block 17 retracts, completing the die head disassembly and increasing the overall practicality.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blown film machine die head mechanism with uniform heating via pipeline, comprising a mounting base (1) having an opening on its surface, wherein an air inlet (2) is fixed to the lower end of the mounting base (1), characterized in that: An inner mold body (3) is fixedly connected to the upper surface of the mounting base (1). A limiting base plate (4) is provided on the upper surface of the mounting base (1). An outer mold body (5) is fixedly connected to the upper surface of the limiting base plate (4). A cooling plate (6) is fixedly connected to the upper end of the outer mold body (5). A feeding opening (7) is fixedly connected to the side surface of the outer mold body (5). A feeding slot (8) is provided on the inner wall of the outer mold body (5). A groove is provided on the lower outer surface of the outer mold body (5). An auxiliary heating plate (9) is fixedly connected to the inner wall of the groove. Two grooves are provided on the upper surface of the mounting base (1). A positioning column (10) is provided on the inner wall of the groove of the mounting base (1). An adjustment slot (11) is opened on the lower side surface of the positioning column (10). A transmission screw (12) is installed through the side surface of the mounting base (1). A pressing slider (13) is provided on the inner wall of the groove of the mounting base (1). A linkage pressing mechanism is provided between the mounting base (1) and the positioning column (10).

2. The blown film machine die head mechanism with uniform pipeline heating according to claim 1, characterized in that: The upper surface of the inner mold body (3) is provided with a filter screen cover, the limiting base plate (4) is a ring design, and the limiting base plate (4) and the outer mold body (5) are respectively connected to the mounting base (1).

3. The blown film machine die head mechanism with uniform pipeline heating according to claim 1, characterized in that: The feeding opening (7) is connected to the feeding slot (8). The upper end of the feeding slot (8) is a ring design, and the lower end of the feeding slot (8) penetrates the inner wall of the outer mold body (5). The auxiliary heating plate (9) is a ring design.

4. The blown film machine die head mechanism with uniform pipeline heating according to claim 1, characterized in that: The mounting base (1) and the positioning column (10) are slidably connected. The upper inner wall of the adjustment slot (11) is inclined. The transmission screw (12) and the mounting base (1) are rotatably connected. The transmission screw (12) and the extrusion slider (13) are threadedly connected. The extrusion slider (13) and the mounting base (1) are slidably connected. The side surface of the extrusion slider (13) is arc-shaped.

5. The blown film machine die head mechanism with uniform pipeline heating according to claim 1, characterized in that: The linkage pressing mechanism includes a fixed upright (14), which is fixedly connected to the inner wall of the groove of the mounting base (1). The upper end of the fixed upright (14) is fixedly connected to a linkage slider (15). Adjustment arms (16) are provided on both sides of the linkage slider (15), and a pressing block (17) is provided at one end of the adjustment arm (16).

6. The blown film machine die head mechanism with uniform pipeline heating according to claim 5, characterized in that: The fixed pole (14) is L-shaped and is slidably connected to the positioning column (10), and a spring is connected between the fixed pole (14) and the positioning column (10).

7. The blown film machine die head mechanism with uniform pipeline heating according to claim 5, characterized in that: The linkage slider (15) is slidably connected to the positioning column (10), and the linkage slider (15) is rotatably connected to the adjusting arm (16). The adjusting arm (16) is rotatably connected to the pressing block (17). The pressing block (17) penetrates the side surface of the positioning column (10), and the pressing block (17) is slidably connected to the positioning column (10). The lower surface of the pressing block (17) is provided with an anti-slip rubber strip.

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