A film blowing machine for improving the thickness uniformity of a product

Abstract

The application relates to a film blowing equipment technology, in particular to a film blowing machine capable of improving the thickness uniformity of products, which comprises a rack, a feeding cylinder connected to the rack, an extrusion mechanism communicated with the feeding cylinder, a blowing assembly connected to the rack, a die head assembly connected to the extrusion mechanism and a correction mechanism connected to the rack, the correction mechanism comprises an air outlet assembly communicated with the blowing assembly, and the air outlet assembly is rotationally connected to the rack. The application has the advantage of improving the thickness uniformity of products.

Description

Technical Field

[0001] This application relates to film blowing equipment technology, and in particular to a blown film machine for improving the uniformity of product thickness. Background Technology

[0002] A blown film machine heats and melts plastic particles and then blows them into a thin film. During the operation of the blown film machine, the plastic particles are heated and melted and then extruded by the extrusion mechanism. The blown body is blown into a certain shape by the blower assembly and the die assembly. At the top, it is gathered by the herringbone mold clamping roller. Finally, it is pulled by the traction machine at a certain speed and wound into a roll by the winding machine to produce the final finished film product.

[0003] Currently, during the blowing and winding of finished films, the lack of constraints in blown film machines causes bulging and twisting of the finished film during the forming process, resulting in uneven film thickness and affecting the quality of the finished film. Summary of the Invention

[0004] To improve the uniformity of product thickness, this application provides a blown film machine for improving product thickness uniformity.

[0005] The blown film machine for improving product thickness uniformity provided in this application adopts the following technical solution: A blown film machine for improving product thickness uniformity includes a frame, a feed cylinder connected to the frame, an extrusion mechanism connected to the feed cylinder, a blower assembly connected to the frame, a die assembly connected to the extrusion mechanism, and a correction mechanism connected to the frame. The correction mechanism includes an air outlet assembly connected to the blower assembly, and the air outlet assembly is rotatably connected to the frame.

[0006] By adopting the above technical solution, when producing finished film, the frame serves as the basic production structure, while the feed cylinder, basic structure, blower assembly, and die head assembly are essential production components. This enables the production of finished film. The air outlet assembly blows air towards the finished film. As the air outlet assembly rotates within the frame, the user can adjust its blowing position on the finished film, allowing it to be subjected to hot or cold air again. When the finished film has uneven thickness, the user adjusts the position of the air outlet assembly. When it moves to a position where the finished film is thicker, hot air is slowly ejected to further thin the film. When it moves to a position where the finished film is thinner, cold air or natural wind is ejected to accelerate cooling and film formation, reducing the degree of thinning and thus improving the uniformity of product thickness.

[0007] Optionally, the correction mechanism further includes a drive assembly connected to the air outlet assembly. The drive assembly includes an annular guide rail rotatably connected to the frame, a rotary motor fixedly connected to the frame, a drive gear rotatably connected to the rotary motor, and a driven gear ring fixedly connected to the annular guide rail. The output end of the rotary motor is coaxially and fixedly connected to the drive gear. The drive gear and the driven gear ring mesh with each other. The driven gear ring is coaxially and fixedly connected to the outside of the annular guide rail. The air outlet assembly is fixedly connected to the annular guide rail.

[0008] By adopting the above technical solution, the drive component increases the power for the movement of the air outlet component relative to the frame. When the rotating motor drives the drive gear to rotate, the meshing of the drive gear and the driven gear ring drives the annular guide rail to rotate. Since the air outlet component is fixed on the annular guide rail, the annular guide rail can drive the air outlet component to rotate outside the finished film, so as to achieve the purpose of the air outlet component spraying air at different positions of the finished film.

[0009] Optionally, the air outlet assembly includes a connecting pipe connected to the blower assembly and an air outlet plate connected to the annular guide rail. The connecting pipe is connected to the air outlet plate, the air outlet plate rotates relative to the frame, and the air outlet plate is provided with an air outlet hole, which is connected to the connecting pipe.

[0010] By adopting the above technical solution, the blower assembly can spray hot air, cold air or natural wind, and the connecting pipe connects to the blower assembly, enabling the air outlet to spray hot air, cold air or natural wind.

[0011] Optionally, the correction mechanism further includes a synchronization component connected to the air outlet assembly. The air outlet assembly further includes a mounting platform fixedly connected to the annular guide rail, a winding shaft rotatably connected to the mounting platform, and a support platform rotatably connected to the winding shaft. The mounting platform and the support platform are respectively located at both ends of the winding shaft. The mounting platform is located at the bottom of the winding shaft. The air outlet plate is fixedly connected to the support platform, and the support platform is fixedly connected to the mounting platform. The connecting pipe is wound around the surface of the winding shaft, and the synchronization component is connected to the winding shaft to drive the winding shaft to rotate.

[0012] By adopting the above technical solution, the air outlet plate needs to be set around the finished membrane. Therefore, in order to facilitate the management of the connecting pipe, the connecting pipe is wound around the winding shaft. When the air outlet plate is adjusted, the synchronization component can control the rotation of the winding shaft to realize the opening and closing of the connecting pipe, thereby improving cleanliness and safety.

[0013] Optionally, the synchronization component includes a synchronous motor fixedly connected to the mounting platform, a synchronous driving gear fixedly connected to the output end of the synchronous motor, and a synchronous driven gear fixedly connected to the winding shaft. The synchronous driving gear and the synchronous driven gear mesh, the output end of the synchronous motor is coaxially fixedly connected to the synchronous driving gear, and the winding shaft passes through and is fixedly connected to the center of the synchronous driven gear.

[0014] By adopting the above technical solution, after the synchronous motor drives the synchronous driving gear to rotate, the synchronous driving gear and the synchronous driven gear mesh to drive the rotation around the shaft, thereby realizing the opening and closing of the connecting pipe.

[0015] Optionally, it may also include a smoothing mechanism connected to the frame, the smoothing mechanism including a smoothing roller that abuts against the product surface and is connected to the frame.

[0016] By adopting the above technical solution, the smoothing roller can deburr the surface of the finished film, making the surface of the finished film smoother. At the same time, it limits the finished film, reducing the possibility of bulging and wrinkling during the winding process, and further improving the uniformity of the thickness of the finished film.

[0017] Optionally, the smoothing mechanism further includes a smoothing shaft fixedly connected to the frame, and the smoothing roller is sleeved and fixedly connected to the smoothing shaft.

[0018] By adopting the above technical solution, the smoothing roller can be fixedly installed.

[0019] Optionally, the number of smoothing rollers is multiple, and the multiple smoothing rollers are arranged alternately.

[0020] By adopting the above technical solution, the finished film can be smoothed multiple times from multiple angles. Through multiple limiting, the smoothing effect is improved and the uniformity of the finished film thickness is increased.

[0021] In summary, this application includes at least one of the following beneficial technical effects: This application achieves the purpose of reprocessing and correcting uneven thickness areas of the finished film by setting an air outlet component that can rotate around the outside of the finished film. This allows the finished film to be formed faster or further processed to thin it, thereby improving the uniformity of the finished film thickness. At the same time, if the finished film has uneven thickness, in the past, the machine had to be stopped to check and adjust the temperature control components in the die head assembly or the blower assembly. With the addition of the air outlet component, the user can directly adjust the position of the air outlet component to assist in the reprocessing and correction of the finished film outlet position sprayed by the die head assembly, without the user having to stop the machine, thus improving production efficiency. This application improves the cleanliness and safety of production by setting up a synchronization component and an independently rotating winding shaft, so that the connecting pipe can be driven to extend and retract by the synchronization component. This application incorporates a smoothing mechanism that uses friction to correct the exterior of the finished film, reducing burrs and improving its quality. Simultaneously, the smoothing roller limits the finished film's position, reducing the likelihood of distortion and bulging, and improving the uniformity of its thickness. Furthermore, users can observe the contact state between the finished film and the smoothing roller to determine if the film's thickness is uneven, facilitating the monitoring of the finished film's quality. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a blown film machine for improving product thickness uniformity, as disclosed in an embodiment of this application.

[0023] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0024] Figure 3 This is a structural diagram designed to emphasize the positional relationship between the mold head assembly and the correction mechanism.

[0025] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle.

[0026] Figure 5 This is a structural diagram designed to emphasize the connection between the smoothing mechanism and the frame.

[0027] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Feed cylinder; 3. Extrusion mechanism; 4. Die head assembly; 5. Blower assembly; 6. Correction mechanism; 61. Air outlet assembly; 611. Connecting pipe; 612. Mounting platform; 613. Winding shaft; 614. Support platform; 615. Air outlet plate; 6151. Air outlet hole; 62. Drive assembly; 621. Circular guide rail; 622. Rotary motor; 623. Drive gear; 624. Driven gear ring; 63. Synchronization assembly; 631. Synchronous motor; 632. Synchronous drive gear; 633. Synchronous driven gear; 7. Smoothing mechanism; 71. Smoothing shaft; 72. Smoothing roller. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail.

[0029] Currently, in order to improve the uniformity of finished film thickness, this application proposes a blown film machine to improve product thickness uniformity.

[0030] This application discloses a blown film machine for improving product thickness uniformity. (Refer to...) Figure 1 and Figure 2 A blown film machine for improving product thickness uniformity includes a frame 1, a feed cylinder 2 connected to the frame 1, an extrusion mechanism 3 connected to the feed cylinder 2, a blower assembly 5 connected to the frame 1, a die assembly 4 connected to the extrusion mechanism 3, a correction mechanism 6 connected to the die assembly 4, and a smoothing mechanism 7 fixedly connected to the frame 1. In this embodiment, the blower assembly 5 can spray hot air, connect to the outside to allow natural air in, or connect to a refrigeration device to spray cold air. The correction mechanism 6 includes a drive assembly 62 connected to the frame 1, an air outlet assembly 61 connected to the blower assembly 5, and a synchronization assembly 63 connected to the drive assembly 62. The air outlet assembly 61 is connected to the drive assembly 62, and the drive assembly 62 drives the air outlet assembly 61 to rotate outside the finished film. The air outlet assembly 61 rotates through the drive assembly 62. The moving connection frame 1 and the correction mechanism 6 are located outside the die head assembly 4, and the air outlet of the air outlet assembly 61 is close to the finished film. When the finished film has uneven thickness, the user can start the drive assembly 62 to drive the air outlet assembly 61 to rotate outside the die head assembly 4 until it reaches the position where the finished film has uneven thickness. Then, the drive assembly 62 is turned off. With the cooperation of the blower assembly 5, the air outlet assembly 61 sprays hot air, natural wind or cold air to the position where the finished film has uneven thickness. When the defective position of the finished film is thicker, the finished film is thinned again by hot air. When the defective position of the finished film is thinner, the position is cooled by natural wind or cold air, so that the cooling speed of the finished film is faster and the possibility of the finished film becoming thinner is reduced. In this way, the uniformity of the thickness of the finished film is improved by the air outlet assembly 61.

[0031] Meanwhile, the number of air outlet components 61 is at least one, so that the air outlet component 61 can simultaneously correct at least one position of uneven thickness of the finished film. In this embodiment, the structure of the air outlet component 61 is described as an example.

[0032] Reference Figure 3 and Figure 4The drive assembly 62 includes an annular guide rail 621 rotatably connected to the frame 1, a rotary motor 622 fixedly connected to the frame 1, a drive gear 623 rotatably connected to the rotary motor 622, and a driven gear ring 624 fixedly connected to the annular guide rail 621. The annular guide rail 621 is wound around the outside of the finished film. The output end of the rotary motor 622 is coaxially fixedly connected to the drive gear 623. The axis of the drive gear 623 is parallel to the vertical direction. The drive gear 623 and the driven gear ring 624 mesh with each other. The driven gear ring 624 is coaxially fixedly connected to the outside of the annular guide rail 621 and is located at the top of the annular guide rail 621. When the user starts the rotary motor 622, it drives the drive gear 623 to rotate. Under the meshing relationship between the drive gear 623 and the driven gear ring 624, the annular guide rail 621 rotates. The air outlet assembly 61 is fixedly connected to the annular guide rail 621, positioning it outside the finished film and above the die head assembly 4. This allows the air outlet assembly 61 to function as an auxiliary component, reprocessing and correcting the finished film without requiring the user to stop the machine to adjust the die head assembly 4, thus improving production efficiency. When the annular guide rail 621 rotates, the air outlet assembly 61 can rotate around the finished film, ensuring that all parts of the finished film can be reprocessed and corrected by the air outlet assembly 61, thereby improving the uniformity of the finished film thickness.

[0033] Reference Figure 3 and Figure 4The air outlet assembly 61 includes a connecting pipe 611 connected to the blower assembly 5, a mounting platform 612 fixedly connected to the annular guide rail 621, a winding shaft 613 rotatably connected to the mounting platform 612, a support platform 614 rotatably connected to the winding shaft 613, and an air outlet plate 615 connected to the annular guide rail 621. The connecting pipe 611 transmits the air generated by the blower assembly 5 to the air outlet assembly 61. The axis of the winding shaft 613 is parallel to the vertical direction. The mounting platform 612 and the support platform 614 are located at the two ends of the winding shaft 613, respectively. The mounting platform 612 is located at the bottom of the winding shaft 613 and provides a platform for connecting the air outlet assembly 61. The air outlet plate 615 is fixedly connected to the support platform 614, which provides a mounting platform for the air outlet plate 615. The support platform 614 is connected by a connecting rod. The air outlet plate 615 is fixedly connected to the mounting platform 612 in a manner that makes the mounting platform 612 and the support platform 614 relatively stationary, while the air outlet plate 613 can rotate independently. The connecting pipe 611 is wound around the surface of the connecting shaft 613. When the user adjusts the position of the air outlet plate 615, the connecting pipe 611 can be retracted or extended by rotating around the connecting shaft 613, which improves the neatness and reduces the possibility of the connecting pipe 611 swinging randomly, thus improving safety. The connecting pipe 611 is connected to the air outlet plate 615, so that the air generated by the blower assembly 5 can be transmitted to the air outlet plate 615. The air outlet plate 615 rotates relative to the frame 1. The air outlet plate 615 is provided with an air outlet hole 6151, which is connected to the connecting pipe 611. The air outlet plate 615 faces the finished film, and the air outlet hole 6151 is located on the side surface of the air outlet plate 615 facing the finished film.

[0034] Reference Figure 3 and Figure 4 The synchronization component 63 includes a synchronous motor 631 fixedly connected to the mounting platform 612, a synchronous driving gear 632 fixedly connected to the output end of the synchronous motor 631, and a synchronous driven gear 633 fixedly connected to the winding shaft 613. The axis of the synchronous driving gear 632 is parallel to the vertical direction. The winding shaft 613 and the synchronous driven gear 633 are coaxially fixed. The winding shaft 613 passes through and is fixedly connected to the synchronous driven gear 633. The synchronous driving gear 632 and the synchronous driven gear 633 mesh. The output end of 1 is coaxially fixedly connected to the center of the synchronous drive gear 632, and passes through the surrounding shaft 613 and is fixedly connected to the center of the synchronous driven gear 633. When the user starts the synchronous motor 631, it drives the synchronous drive gear 632 to rotate. Then, through the meshing relationship between the synchronous drive gear 632 and the synchronous driven gear 633, it drives the surrounding shaft 613 to rotate, so as to realize the purpose of the synchronous component 63 being connected to the surrounding shaft 613 and driving the surrounding shaft 613 to rotate, and to realize the purpose of the synchronous component 63 to retract and extend the connecting pipe 611.

[0035] Reference Figure 2 and Figure 5The smoothing mechanism 7 includes a smoothing shaft 71 and a smoothing roller 72 fixedly connected to the frame 1. The smoothing shaft 71 passes through and is fixedly connected to the smoothing roller 72. The axis of the smoothing shaft 71 and the axis of the smoothing roller 72 coincide, so that the smoothing roller 72 is fixedly connected to the frame 1. At the same time, the surface of the smoothing roller 72 abuts against the surface of the product. When the product is wound up, the surface of the product and the surface of the smoothing roller 72 generate friction. The smoothing roller 72 can smooth the surface of the product and limit the product, so that the formed product is restricted within the range of the smoothing roller 72, reducing the possibility of twisting, bulging and other defects in the finished film during forming, and further improving the uniformity of the thickness of the finished film.

[0036] At the same time, refer to Figure 2 and Figure 5 There are multiple smoothing rollers 72 and multiple smoothing shafts 71. The number of smoothing rollers 72 and the number of smoothing shafts 71 are equal, and the smoothing rollers 72 and smoothing shafts 71 correspond one-to-one. The multiple smoothing rollers 72 are staggered and located at different heights, so that the outer periphery of the finished film can be rubbed by the smoothing rollers 72, thereby improving the uniformity of the thickness of the finished film.

[0037] In other embodiments of this application, the smoothing mechanism 7 may further include a mounting plate and a smoothing motor. The mounting plate is wrapped around the outside of the product film and is fixedly connected to the frame 1. The smoothing motor is fixedly connected to the mounting plate. Multiple smoothing shafts 71 are rotatably connected to the mounting plate. The output end of the smoothing motor can drive the smoothing shafts 71 to rotate through a coupling, causing the smoothing roller 72 to rotate. This can adjust the relative speed between the smoothing roller 72 and the finished film, reduce or increase the friction between the smoothing roller 72 and the finished film, and further adjust the friction of the smoothing roller 72.

[0038] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A blown film machine for improving product thickness uniformity, comprising a frame (1), a feed cylinder (2) connected to the frame (1), an extrusion mechanism (3) communicating with the feed cylinder (2), a blower assembly (5) connected to the frame (1), and a die assembly (4) connected to the extrusion mechanism (3), characterized in that: It also includes a correction mechanism (6) connected to the frame (1), the correction mechanism (6) including an air outlet assembly (61) connected to the blower assembly (5), the air outlet assembly (61) being rotatably connected to the frame (1); The correction mechanism (6) further includes a drive assembly (62) connected to the air outlet assembly (61). The drive assembly (62) includes an annular guide rail (621) rotatably connected to the frame (1), a rotary motor (622) fixedly connected to the frame (1), a drive gear (623) rotatably connected to the rotary motor (622), and a driven gear ring (624) fixedly connected to the annular guide rail (621). The output end of the rotary motor (622) is coaxially fixedly connected to the drive gear (623). The drive gear (623) and the driven gear ring (624) mesh with each other. The driven gear ring (624) is coaxially fixedly connected to the outside of the annular guide rail (621). The air outlet assembly (61) is fixedly connected to the annular guide rail (621). The air outlet assembly (61) includes a connecting pipe (611) connected to the blower assembly (5) and an air outlet plate (615) connected to the annular guide rail (621). The connecting pipe (611) is connected to the air outlet plate (615). The air outlet plate (615) rotates relative to the frame (1). The air outlet plate (615) is provided with an air outlet hole (6151), which is connected to the connecting pipe (611).

2. The blown film machine for improving product thickness uniformity according to claim 1, characterized in that: The correction mechanism (6) further includes a synchronization component (63) connected to the air outlet assembly (61). The air outlet assembly (61) further includes a mounting platform (612) fixedly connected to the annular guide rail (621), a winding shaft (613) rotatably connected to the mounting platform (612), and a support platform (614) rotatably connected to the winding shaft (613). The mounting platform (612) and the support platform (614) are respectively located at both ends of the winding shaft (613). The mounting platform (612) is located at the bottom of the winding shaft (613). The air outlet plate (615) is fixedly connected to the support platform (614). The support platform (614) is fixedly connected to the mounting platform (612). The connecting pipe (611) is wound around the surface of the winding shaft (613). The synchronization component (63) is connected to the winding shaft (613) and drives the winding shaft (613) to rotate.

3. The blown film machine for improving product thickness uniformity according to claim 2, characterized in that: The synchronization component (63) includes a synchronous motor (631) fixedly connected to the mounting platform (612), a synchronous driving gear (632) fixedly connected to the output end of the synchronous motor (631), and a synchronous driven gear (633) fixedly connected to the winding shaft (613). The synchronous driving gear (632) and the synchronous driven gear (633) mesh. The output end of the synchronous motor (631) is coaxially fixedly connected to the synchronous driving gear (632). The winding shaft (613) passes through and is fixedly connected to the center of the synchronous driven gear (633).

4. The blown film machine for improving product thickness uniformity according to claim 1, characterized in that: It also includes a smoothing mechanism (7) connected to the frame (1), the smoothing mechanism (7) including a smoothing roller (72) abutting against the product surface, the smoothing roller (72) being connected to the frame (1).

5. A blown film machine for improving product thickness uniformity according to claim 4, characterized in that: The smoothing mechanism (7) further includes a smoothing shaft (71) fixedly connected to the frame (1), and the smoothing roller (72) is sleeved and fixedly connected to the smoothing shaft (71).

6. A blown film machine for improving product thickness uniformity according to claim 5, characterized in that: The number of smoothing rollers (72) is multiple, and the multiple smoothing rollers (72) are arranged alternately.

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