An apparatus for producing a matte pe heat shrink film

Abstract

The utility model provides a production mechanism for matt PE heat shrinkable film, it solved the PE heat shrinkable film cooling regulation etc problem, it includes the cooling plate of strip shape, has the through port on the cooling plate, and the through port upper side and lower side are connected with the air -blowing subassembly through the swing subassembly respectively, is provided with the air volume adjusting subassembly of swing subassembly linkage between air -blowing subassembly and through port. The utility model has the advantages of high degree of automation, pre -pressing effect is good, and strong universality etc.

Description

Technical Field

[0001] This utility model belongs to the field of heat shrink film production technology, specifically relating to a production mechanism for matte PE heat shrink film. Background Technology

[0002] The production process of matte PE heat shrink film mainly includes raw material proportioning, melt extrusion, casting, stretching and shaping, cooling and winding. First, polyethylene raw materials and matte masterbatch are mixed in a specific ratio. The matting agent in the masterbatch imparts a matte texture to the film. The mixed raw materials are heated and melted in an extruder to form a uniform melt, which is then extruded through a die to form a sheet blank. Subsequently, the blank enters the stretching system and is stretched longitudinally and laterally under heating conditions. During stretching, the molecular chains align in an orientation, improving the film's shrinkage performance and mechanical strength. Simultaneously, the matte masterbatch is evenly dispersed, ensuring consistent surface gloss. After stretching, rapid cooling and shaping are performed to fix the molecular chain orientation structure. The cooling process requires precise control of temperature and airflow to avoid crystal points or uneven gloss on the film surface. Finally, after edge trimming, the film is wound into a roll. During this process, thickness uniformity, shrinkage rate, and matte effect must be monitored to ensure the product meets specifications. However, in actual processing, uneven cooling occurs, resulting in poor heat setting of the stretched film.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a PE shrink film blowing machine [202311461573.X], which includes a PE film blowing device. The PE film blowing device includes a winding assembly, a guiding assembly, a blowing assembly, and a feeding assembly. The feeding assembly is used to prepare the raw materials before the preparation of the PE shrink film. The blowing assembly is used to inflate the heated PE particles. The guiding assembly is used to guide the PE shrink film before winding. The winding assembly is used to wind the processed PE shrink film. The feeding assembly includes a feeding bin with a feeding port at the top center and multiple evenly distributed feeding ports around the feeding port.

[0004] The above solution has solved the problem of PE film winding to a certain extent, but it still has many shortcomings, such as uneven cooling and poor thermoforming effect of the film. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a reasonably designed production mechanism for matte PE heat shrink film that has a good thermoforming effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a production mechanism for matte PE heat shrink film, comprising a long strip-shaped cooling plate, a passage opening on the cooling plate, and a blowing assembly connected to the upper and lower sides of the passage opening via a swing assembly, and an air volume adjustment assembly that is linked to the swing assembly is provided between the blowing assembly and the passage opening.

[0007] In the above-mentioned production mechanism for matte PE heat shrink film, a fixed base with mounting holes is provided at both ends of the cooling plate, a tensioning plate that can slide up and down is installed inside the cooling plate, a tensioning port is opened on the tensioning plate opposite to the passage, and a lifting drive assembly is installed between the tensioning plate and the fixed base.

[0008] In the aforementioned production mechanism for matte PE heat shrink film, a tensioning guide roller is installed inside the tensioning opening, and the central axis of the tensioning guide roller is parallel to the central axis of the cooling plate.

[0009] In the above-mentioned production mechanism for matte PE heat shrink film, the lifting drive assembly includes a drive motor mounted on a fixed base, and the drive motor is driven by meshing with a tensioning plate through a gear rack.

[0010] In the aforementioned production mechanism for matte PE heat shrink film, the blowing assembly includes a blowing pipe rotatably mounted on the upper and lower sides of the inlet, and the blowing pipe has several flat blowing nozzles arranged axially.

[0011] In the above-mentioned production mechanism for matte PE heat shrink film, the swing assembly includes a swing gear ring installed at the end of the blower pipe, a cooling plate is slidably mounted with a swing rack located between the swing gear ring and engaging with it for transmission, and the swing rack is connected to an electric push rod for transmission.

[0012] In the above-mentioned production mechanism for matte PE heat shrink film, the air volume adjustment component includes an air inlet installed at the end of the cooling plate. The air inlet is connected to the air blower. The air inlet and the air blower have adjustment plates that fit together. The adjustment plates are respectively opened with centrally symmetrical adjustment ports. The adjustment ports overlap or are circumferentially misaligned as the air blower rotates.

[0013] In the aforementioned production mechanism for matte PE heat shrink film, a guide rod is installed inside the inlet, the guide rod is located between the air blowers, and a piezoelectric sensor is installed at the end of the guide rod.

[0014] In the aforementioned production mechanism for matte PE heat shrink film, the cooling plate has perforations and elongated assembly slots, with wind speed sensors embedded in the perforations.

[0015] In the aforementioned production mechanism for matte PE heat shrink film, baffles are installed on the cooling plate, with the baffles located on both sides of the passage.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: the blowing assembly can swing to adjust the blowing direction, and the air volume adjustment assembly adaptively adjusts the air force during the adjustment process, thereby ensuring the heat setting effect of the PE heat shrink film; the cooling plate has a built-in tensioning plate, which can tension the film surface and further improve its setting quality; the cooling plate has multiple built-in sensors to monitor the film transmission in real time and ensure the safety of PE heat shrink film production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0019] Figure 3 This is a partial sectional view of the present invention;

[0020] Figure 4 This is a structural cross-sectional view of the present invention;

[0021] In the figure, there are: cooling plate 1, hollow opening 11, assembly groove 12, baffle 13, passage 2, swing assembly 3, swing gear ring 31, swing rack 32, electric push rod 33, air blowing assembly 4, air blowing pipe 41, air blowing nozzle 42, air volume adjustment assembly 5, air inlet interface 51, adjustment plate 52, adjustment port 53, guide rod 54, fixed base 6, tension plate 61, tensioning port 62, tensioning guide roller 63, drive motor 64, and gear rack 65. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1-4 As shown, a production mechanism for matte PE heat shrink film includes a long, strip-shaped cooling plate 1, typically made of aluminum alloy to balance structural strength and lightweight design. The cooling plate 1 has an opening 2 for the heat shrink film to be extracted. An air blowing assembly 4 is connected to the upper and lower sides of the opening 2 via a swing assembly 3. The air blowing assembly 4 swings and blows air, adjusting its direction according to the heat shrink film's transfer rate, thereby increasing or decreasing the heat exchange area on the heat shrink film surface. An airflow regulating assembly 5, linked to the swing assembly 3, is located between the air blowing assembly 4 and the opening 2. This airflow regulating assembly 5 adaptively adjusts the airflow force to ensure cooling stability.

[0024] Specifically, the cooling plate 1 has fixed bases 6 with mounting holes at both ends for production assembly. These bases have built-in tensioning mechanisms, including a tensioning plate 61 that can slide up and down inside the cooling plate 1. The tensioning plate 61 has a tensioning opening 62 opposite to the passage opening 2. A lifting drive assembly is installed between the tensioning plate 61 and the fixed base 6. The up and down movement of the tensioning plate 61 allows the tensioning opening 62 to overlap or misalign with the passage opening 2.

[0025] Furthermore, to ensure the lubrication of the heat shrink film during transmission, a tension guide roller 63 is installed inside the tensioning opening 62, with the central axis of the tension guide roller 63 parallel to the central axis of the cooling plate 1. The tension guide roller 63 is typically equipped with a temperature sensor to monitor the temperature of the heat shrink film in real time.

[0026] Furthermore, the lifting drive assembly and sensing elements achieve feedback adjustment, specifically including a drive motor 64 mounted on the fixed base 6, which meshes with the tension plate 61 via a gear and rack 65. The tension plate 61 can slide upwards or downwards, and a slide rail structure is provided between its two sides and the cooling plate 1.

[0027] Furthermore, the blower assembly 4 is connected to an external blower motor, including a blower pipe 41 rotatably mounted on the upper and lower sides of the through-port 2. The blower pipe 41 has several flat blower nozzles 42 arranged axially. The blower nozzles 42 guide cooling air to blow evenly onto the surface of the heat-shrink film. The blowing pipe 41 can be rotated at an angle between 0 and 180°, and can also be used for cooling by suction under negative pressure.

[0028] In addition, the swing assembly 3 drives the upper and lower air pipes 41 to swing synchronously, including the swing toothed ring 31 installed at the end of the air pipe 41, and the cooling plate 1 is slidably mounted with the swing rack 32 located between the swing toothed rings 31 and meshing with them for transmission. The swing rack 32 is connected to the electric push rod 33 for transmission, and its swing angle is adjusted according to the surface temperature of the heat shrink film.

[0029] Meanwhile, the air volume adjustment component 5 includes an air inlet 51 installed at the end of the cooling plate 1. The air inlet 51 is connected to the air blower 41. The air inlet 51 and the air blower 41 have adjustment plates 52 that fit together. The adjustment plates 52 are respectively opened with centrally symmetrical adjustment ports 53. The adjustment ports 53 overlap or are circumferentially misaligned as the air blower 41 rotates.

[0030] The airflow adjustment component 5 ensures that when the air duct 41 rotates due to the swing component 3, the overlapping area of ​​the adjustment ports 53 on the upper and lower adjustment plates 52 changes synchronously. When the air duct 41 is perpendicular to the film plane, the overlap of the adjustment ports 53 is at its maximum, and the airflow is at its maximum. As the swing angle of the air duct 41 increases to both sides, the misalignment of the adjustment ports 53 increases, the effective ventilation area decreases, and the airflow decreases proportionally and linearly. This dynamic airflow adjustment perfectly matches the cooling intensity per unit area of ​​the film under different blowing angles—high airflow is required for rapid cooling and shaping when blowing vertically, while airflow is reduced when blowing at a large angle to avoid excessive impact that could cause film vibration or surface defects.

[0031] As can be seen, a guide rod 54 is installed inside the port 2, located between the air pipes 41, and a piezoelectric sensor is installed at the end of the guide rod 54. The surface of the guide rod 54 is plated with hard chrome or coated with Teflon to reduce friction. The piezoelectric sensor 54a monitors the vibration amplitude and frequency signal of the thin film 7 in real time when it is running in the cooling zone.

[0032] Clearly, the cooling plate 1 has a perforation 11 and a long, narrow mounting slot 12. The perforation 11 houses a wind speed sensor. The data detected by the wind speed sensor is fed back to the control system to calibrate and optimize the air supply pressure or valve opening of each air duct 41, compensate for uneven wind speed caused by pipe resistance, installation differences, or filter blockage, and ensure the uniformity of the cooling airflow in the width direction of the film.

[0033] Preferably, a baffle 13 is installed on the cooling plate 1, and the baffle 13 is located on both sides of the passage 2. The height of the baffle 13 is adjustable. Its main function is to constrain the direction of cooling airflow, reduce dissipation, and improve airflow utilization and cooling efficiency.

[0034] In summary, the principle of this embodiment is as follows: the built-in swing component 3 of the cooling plate 1 drives the blowing component 4 to adjust the blowing direction. During the adjustment process, the air volume adjustment component 5 is driven to adjust the air volume adaptively to ensure the blowing temperature and make the heat shrink film have the best cooling efficiency.

[0035] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0036] Although this document frequently uses terms such as cooling plate 1, hollow opening 11, assembly groove 12, baffle 13, passage 2, swing assembly 3, swing gear ring 31, swing rack 32, electric push rod 33, air blowing assembly 4, air blowing pipe 41, air blowing nozzle 42, air volume adjustment assembly 5, air inlet 51, adjustment plate 52, adjustment port 53, guide rod 54, fixed base 6, tension plate 61, tensioning port 62, tensioning guide roller 63, drive motor 64, gear rack 65, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A production apparatus for matte PE heat shrink film, comprising a strip-shaped cooling plate (1) having a passage opening (2), characterized in that, The upper and lower sides of the passage (2) are respectively connected to the blowing assembly (4) via the swing assembly (3), and the blowing assembly (4) and the passage (2) are provided with an air volume adjustment assembly (5) that is linked with the swing assembly (3).

2. The production mechanism for matte PE heat shrink film according to claim 1, characterized in that, The cooling plate (1) is provided with a fixed base (6) with mounting holes at both ends. A tension plate (61) that can slide up and down is installed inside the cooling plate (1). The tension plate (61) has a tensioning port (62) opposite to the passage (2). A lifting drive assembly is installed between the tension plate (61) and the fixed base (6).

3. The production mechanism for matte PE heat shrink film according to claim 2, characterized in that, A tensioning guide roller (63) is installed inside the tensioning opening (62), and the central axis of the tensioning guide roller (63) is parallel to the central axis of the cooling plate (1).

4. A production mechanism for matte PE heat shrink film according to claim 2, characterized in that, The lifting drive assembly includes a drive motor (64) mounted on a fixed base (6), and the drive motor (64) is driven by a gear rack (65) meshing with a tensioning plate (61).

5. A production mechanism for matte PE heat shrink film according to claim 1, characterized in that, The blower assembly (4) includes a blower pipe (41) rotatably mounted on the upper and lower sides of the through-hole (2), and the blower pipe (41) has a plurality of flat blower nozzles (42) arranged along the axial direction.

6. A production mechanism for matte PE heat shrink film according to claim 5, characterized in that, The swing assembly (3) includes a swing gear ring (31) installed at the end of the blower pipe (41), and the cooling plate (1) is slidably mounted with a swing rack (32) located between the swing gear ring (31) and meshing with it for transmission. The swing rack (32) is connected to the electric push rod (33) for transmission.

7. A production mechanism for matte PE heat shrink film according to claim 6, characterized in that, The air volume adjustment component (5) includes an air inlet (51) installed at the end of the cooling plate (1). The air inlet (51) is connected to the blower pipe (41). The air inlet (51) and the blower pipe (41) have adjustment plates (52) that fit together. The adjustment plates (52) are respectively provided with centrally symmetrical adjustment ports (53). The adjustment ports (53) overlap or are circumferentially misaligned as the blower pipe (41) rotates.

8. A production mechanism for matte PE heat shrink film according to claim 5, characterized in that, A guide rod (54) is installed inside the passage (2). The guide rod (54) is located between the blow pipes (41). A piezoelectric sensor is installed at the end of the guide rod (54).

9. A production mechanism for matte PE heat shrink film according to claim 1, characterized in that, The cooling plate (1) has a hollow opening (11) and a long strip-shaped assembly groove (12), and the hollow opening (11) houses a wind speed sensor.

10. A production mechanism for matte PE heat shrink film according to claim 1, characterized in that, A baffle (13) is installed on the cooling plate (1), and the baffle (13) is located on both sides of the passage (2).

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