Roller body device for producing biaxially oriented film

Abstract

The roller body device for producing the two-way stretch film comprises a roller body, the roller body comprises a roller core, shaft heads are arranged at the two ends of the roller core respectively, a rubber layer is wrapped on the outer side of the roller core, annular grooves are formed in the outer circumferential faces of the two ends of the rubber layer respectively in the circumferential direction, and the two ends of the rubber layer are connected with the shaft heads. The two ends of the rubber layer are sleeved with the two threaded sleeves respectively, external threads are arranged on the outer circumferential faces of the threaded sleeves, the threaded sleeves are sleeved with abrasion-resistant sleeves, internal threads connected with the external threads are arranged on the inner circumferential faces of the abrasion-resistant sleeves, and two edge pressing wheels are arranged at the two ends of the upper portion of the roller body respectively. And a heating device is arranged above each edge pressing wheel. The wear-resistant sleeve and the edge pressing wheel are additionally arranged on the rubber roller, so that the wear resistance of the rubber roller is improved, the service life of the rubber roller is remarkably prolonged, the replacement frequency is reduced, the production efficiency and the product quality are improved, and production interruption and quality fluctuation caused by wear of the rubber roller are reduced; and the heatable edge pressing wheel can be used for carrying out plastic deformation on the thermoplastic plastic film, so that the flatness of the film surface is further improved.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to film production equipment, in particular to a roller device for producing biaxially stretched films. Background Art

[0002] During the production of biaxially oriented films, such as BOPP and BOPET, after the film passes through the chain clamp transverse stretching process, the edges of the film are twisted and deformed due to the pulling and squeezing action of the chain clamps, resulting in an uneven film surface. This deformation not only affects the film's appearance quality, but also, in the subsequent traction and rewinding process, the uneven film surface will shuttle in an S-shaped path between multiple steel and rubber rollers, causing severe wear on the edges of the rubber rollers. Especially during high-speed production, the uneven film surface will contact the rubber rollers, rapidly wearing the rubber surface and forming grooves, affecting production efficiency and product quality.

[0003] Statistics show that rubber roller wear caused by uneven film surfaces increases the frequency of rubber roller replacement by 30%, thereby increasing production costs. Furthermore, uneven film surfaces cause fluctuations in roller pressure and tension during conveying. These fluctuations further impact production control and product quality, resulting in a 5-10% decrease in product qualification rates.

[0004] In general, the rubber rollers used in the production of biaxially oriented films in the prior art have the following deficiencies:

[0005] 1. The cost of replacing and repairing rubber rollers is high

[0006] In the production of biaxially oriented film, rubber rollers are widely used in the traction and winding sections due to their elasticity. However, due to the unevenness of the film edges, rubber rollers can wear rapidly at high production speeds, particularly where they come into contact with the uneven film surface. This wear not only reduces the roller's service life but also increases maintenance costs and downtime.

[0007] Furthermore, rubber roller wear can lead to instability in the production process, such as tension and pressure fluctuations. These fluctuations are transmitted throughout the entire production line, affecting the stability of subsequent processes and product quality. Therefore, solving the problem of rubber roller wear is of great significance for improving production efficiency and product quality.

[0008] In the production of biaxially oriented film, rubber roller wear leads to high replacement and repair costs. Due to the unevenness of the film's edges, the rubber roller wears more rapidly when in contact with the film surface, especially at high production speeds. This wear not only reduces the roller's lifespan but also increases repair costs and downtime. Furthermore, frequent replacement and repairs reduce production efficiency, impacting overall production schedules and delivery times.

[0009] 2. Production control and product quality are affected.

[0010] An uneven film surface causes fluctuations in roller pressure and film tension during conveying, further impacting production control and product quality. Statistics show that tension and pressure fluctuations caused by uneven film surfaces can reduce product yields by 5-10%. This fluctuation not only impacts product consistency and reliability but also increases the costs of subsequent quality inspection and waste disposal. Furthermore, unstable production control can lead to equipment failures and safety incidents, increasing production risks. Therefore, addressing film surface unevenness is crucial to improving production control stability and product quality. Utility Model Content

[0011] The purpose of the utility model is to provide a roller device for producing biaxially stretched film, which solves the technical problems of rapid wear and high replacement frequency of rubber rollers in the prior art.

[0012] The utility model discloses a roller device for producing biaxially stretched film, comprising a roller body, wherein the roller body comprises a roller core, shaft heads are respectively provided at both ends of the roller core, the outer side of the roller core is covered with a rubber layer, an annular groove is respectively provided in the outer circumferential surface of the end portions of the rubber layer along the circumferential direction, a threaded sleeve is respectively provided in the two annular grooves, the two threaded sleeves are respectively sleeved on the two ends of the rubber layer, an external thread is provided on the outer circumferential surface of the threaded sleeve, a wear-resistant sleeve is sleeved on the threaded sleeve, and an internal thread connected to the external thread is provided on the inner circumferential surface of the wear-resistant sleeve.

[0013] Two pressing wheels are respectively provided at the upper ends of the roller body. The axial directions of the pressing wheels are parallel to the axial direction of the roller body, and the pressing wheels are arranged at intervals along the axial direction of the roller body. A heating device is respectively provided above any pressing wheel. Any pressing wheel comprises a temperature-uniform layer and a metal shell. A bearing mounting hole is provided in the temperature-uniform layer. The metal shell is covered on the outer side of the temperature-uniform layer. An infrared temperature measuring probe is respectively provided on one side of any pressing wheel. The control end of the heating device and the output end of the infrared temperature measuring probe are both connected to a controller.

[0014] Furthermore, the wear-resistant sleeve is a single-layer or multi-layer structure.

[0015] Furthermore, a chamfered angle structure is provided on the outer side of the wear-resistant sleeve.

[0016] Furthermore, the wear-resistant sleeve has a thickness of 0.1-2 mm.

[0017] Furthermore, the heating device is an induction coil.

[0018] Compared with the prior art, the utility model has a positive and significant effect. By adding a wear-resistant sleeve and a pressure wheel to the rubber roller, the utility model improves the wear resistance of the rubber roller, significantly increases the service life of the rubber roller, reduces the replacement frequency, improves production efficiency and product quality, and reduces production interruptions and quality fluctuations caused by rubber roller wear. The heated pressure wheel can plastically deform the thermoplastic plastic film, further improve the flatness of the film surface, improve the effect of film edge processing, and enhance the stability of the production system and the consistency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a roller device for producing biaxially oriented film according to the present invention.

[0020] Figure 2 This is a side view schematic diagram of a pressure wheel in a roller device for producing biaxially oriented film according to the present invention. DETAILED DESCRIPTION

[0021] The following is a further description of the present invention in conjunction with an embodiment. However, the present invention is not limited to the embodiment. All similar variations of the present invention should be included in the scope of protection of the present invention. The use of directions such as up, down, front, back, left, right, center, inside, and outside in the present invention is only for the convenience of description and does not limit the technical solution of the present invention.

[0022] like Figure 1-Figure 2 As shown, the utility model is a roller device for producing biaxially stretched film, comprising a roller body, wherein the roller body comprises a roller core 1, wherein shaft heads 2 are respectively provided at both ends of the roller core 1, and the outer side of the roller core 1 is covered with a rubber layer 3, wherein an annular groove 4 is respectively provided in the outer circumferential surface of the end portions of the rubber layer 3 along the circumferential direction, wherein each of the two annular grooves 4 is provided with a threaded sleeve 5, and the two threaded sleeves 5 are respectively sleeved on the two ends of the rubber layer 3, and an external thread is provided on the outer circumferential surface of the threaded sleeve 5, and a wear-resistant sleeve 6 is sleeved on the threaded sleeve 5, and an internal thread connected to the external thread is provided on the inner circumferential surface of the wear-resistant sleeve 6.

[0023] Two pressing wheels 7 are respectively provided at the upper ends of the roller body. The axial directions of the pressing wheels 7 are parallel to the axial direction of the roller body. The pressing wheels 7 are arranged at intervals along the axial direction of the roller body. A heating device 8 is respectively provided above any pressing wheel 7. Any pressing wheel 7 includes a temperature-uniform layer 13 and a metal shell 9. A bearing mounting hole 10 is provided in the temperature-uniform layer 13. The metal shell 9 is covered on the outside of the temperature-uniform layer 13. An infrared temperature measuring probe 11 is respectively provided on one side of any pressing wheel 7. The control end of the heating device 8 and the output end of the infrared temperature measuring probe 11 are connected to a controller (not shown in the figure).

[0024] Furthermore, the wear-resistant sleeve 6 is a single-layer or multi-layer structure.

[0025] Furthermore, a chamfered structure 12 is provided on the outer side of the wear-resistant sleeve 6 .

[0026] Furthermore, the wear-resistant sleeve 6 has a thickness of 0.1-2 mm.

[0027] Furthermore, the heating device 8 is an induction coil.

[0028] Specifically, the shaft head 2, rubber layer 3, temperature-averaging layer 13, metal shell 9, bearing mounting hole 10, induction coil, etc. in this embodiment all adopt well-known solutions in the prior art, which are well understood by those skilled in the art and will not be described in detail here.

[0029] The working principle of this embodiment is as follows:

[0030] The material selection and structural design of the wear-resistant sleeve 6 are the key to improving the wear resistance and service life of the rubber roller.

[0031] Wear-Resistant Material Selection: Wear-resistant sleeve 6 is made of wear-resistant materials such as stainless steel, nickel, copper, aluminum, PEEK (polyetheretherketone), PPS (polyphenylene sulfide), and POM (polyoxymethylene). These materials are selected for their excellent wear resistance and chemical stability, effectively extending the service life of the rubber roller. Depending on the film characteristics and production requirements, different materials can be flexibly selected to suit different working conditions. For example, stainless steel is widely used in the food packaging industry due to its corrosion resistance and strength; PEEK and PPS are suitable for high-temperature production environments due to their high temperature resistance and wear resistance.

[0032] The wear-resistant sleeve 6 can be a single-layer or multi-layer structure to adapt to the characteristics of different films. The single-layer structure is simple and low-cost, and is suitable for general wear environments; the multi-layer structure provides higher wear resistance and is suitable for high wear environments.

[0033] The chamfered structure 12 of the wear-resistant sleeve 6 increases the space at both ends, thereby reducing disturbance to the roller body and improving the stability of the roller body.

[0034] Quick replacement design: The wear-resistant sleeve 6 adopts a threaded connection design, which is similar to the installation method of a nut. No special tooling equipment is required. The wear-resistant sleeve 6 can be quickly replaced manually and can be repaired online, which greatly saves maintenance time and costs and greatly improves production efficiency.

[0035] Auxiliary design of the pressure wheel 7: In order to further improve the stability of the system, two pressure wheels 7 are added to the upper ends of the roller body. The pressure wheels 7 flatten the twisted and deformed parts of the edge of the membrane surface, improve the stability of the system tension and roller deflection, and reduce the wear of the rubber roller caused by the uneven membrane surface. The structure of the pressure wheel 7 is designed to be metal on the outside, a temperature-equalizing layer 13 in the middle, and bearings installed inside. The outer metal layer is in direct contact with the film and is made of wear-resistant material to improve the durability of the pressure wheel 7. The function of the temperature-equalizing layer 13 is to evenly distribute heat and ensure the consistency of the surface temperature of the pressure wheel 7; the internal bearings ensure that the pressure wheel 7 can rotate smoothly, reducing friction and wear.

[0036] The temperature-equalizing layer 13 is a metal-jacketed cavity filled with a gas-liquid two-phase medium. This cavity is subjected to negative pressure, creating phase-change heat transfer during the heat exchange process. Phase-change heat transfer is the best heat-equalizing method among known heat exchange and temperature-equalizing methods.

[0037] Working mechanism of the edge pressing wheel 7: During the film pulling and winding process, the edge pressing wheel 7 applies pressure to the edge of the film to correct its distortion. This design helps to reduce film fluctuations in subsequent production processes and improve product quality.

[0038] Design of heated pressing wheel 7: For thermoplastic films, the pressing wheel 7 can be heated to achieve multiple thermoplastic shaping by utilizing the plastic deformation characteristics of the edge deformation position of the thermoplastic film, further improving the flattening effect of the pressing wheel 7. The heating method adopts electromagnetic induction heating, that is, an induction coil is placed on the outside of the roller, and an infrared temperature probe 11 is used to detect the surface temperature of the pressing wheel 7. A closed-loop temperature control is formed with the external power supply and controller to ensure the temperature stability of the pressing wheel 7. That is, when the production conditions change, the temperature can be maintained at a constant level, thereby improving the thermoplastic shaping effect and the consistency of film processing.

[0039] To sum up, the utility model improves the wear resistance of the rubber roller by adding a wear-resistant sleeve 6 and a pressure wheel 7 to the rubber roller, significantly improves the service life of the rubber roller, reduces the replacement frequency, improves production efficiency and product quality, and reduces production interruptions and quality fluctuations caused by rubber roller wear. The heated pressure wheel 7 can plastically deform the thermoplastic plastic film, further improve the flatness of the film surface, improve the effect of film edge processing, and enhance the stability of the production system and the consistency of the product.

[0040] The manufacturing process of the utility model includes but is not limited to the following steps:

[0041] 1. Select suitable wear-resistant materials, such as stainless steel, nickel, copper, etc., to make wear-resistant sleeve 6.

[0042] 2. According to the characteristics of the film, the shape of the wear-resistant sleeve 6 is designed, such as adopting a chamfered angle structure 12.

[0043] 3. Install wear-resistant steel sleeves on the rubber layer 3 on both sides of the rubber roller to ensure that they are tightly bonded to the rubber layer 3.

[0044] 4. Add two pressing wheels 7 at both ends above the roller body, adjust the position and pressure of the pressing wheels 7 to ensure that the twisted and deformed parts of the edge of the film surface are pressed flat.

[0045] 5. The pressing wheel 7 is heated by electromagnetic induction heating, and a closed-loop temperature control is formed through the infrared temperature probe 11 and the external power supply and controller to achieve plastic deformation of the thermoplastic film.

Claims

1. A roller device for producing biaxially oriented film, characterized in that: The roller body includes a roller core, and shaft heads are respectively provided at both ends of the roller core. The outer side of the roller core is covered with a rubber layer. An annular groove is respectively provided in the outer circumferential surface of the two ends of the rubber layer along the circumferential direction. A threaded sleeve is respectively provided in each of the two annular grooves. The two threaded sleeves are respectively sleeved on the two ends of the rubber layer. An external thread is provided on the outer circumferential surface of the threaded sleeve. A wear-resistant sleeve is sleeved on the threaded sleeve. An internal thread connected to the external thread is provided on the inner circumferential surface of the wear-resistant sleeve. Two pressing wheels are respectively provided at the upper ends of the roller body. The axial directions of the pressing wheels are parallel to the axial direction of the roller body, and the pressing wheels are arranged at intervals along the axial direction of the roller body. A heating device is respectively provided above any pressing wheel. Any pressing wheel comprises a temperature-uniform layer and a metal shell. A bearing mounting hole is provided in the temperature-uniform layer. The metal shell is covered on the outer side of the temperature-uniform layer. An infrared temperature measuring probe is respectively provided on one side of any pressing wheel. The control end of the heating device and the output end of the infrared temperature measuring probe are both connected to a controller.

2. A roller device for producing biaxially oriented film according to claim 1, characterized in that: The wear-resistant sleeve is a single-layer or multi-layer structure.

3. The roller device for producing biaxially oriented film according to claim 1, characterized in that: The outer side of the wear-resistant sleeve is provided with a chamfered structure.

4. The roller device for producing biaxially oriented film according to claim 1, characterized in that: The thickness of the wear-resistant sleeve is 0.1-2 mm.

5. The roller device for producing biaxially oriented film according to claim 1, characterized in that: The heating device is an induction coil.

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