An apparatus for processing wound film using a co-extrusion die.

Abstract

This utility model discloses a device for processing stretch film using a co-extrusion die, relating to the field of stretch film production technology. It includes: an extrusion molding mechanism for extruding and molding the stretch film; and a raw material pretreatment mechanism, comprising a fixed frame sleeved on the outside of a feed cylinder, a rotating shaft rotatably nested below the end of the fixed frame via a bearing, a motor A fixedly mounted on the top of the fixed frame and driven by the rotating shaft, the bottom end of the rotating shaft extending to the inside of the feed cylinder and fixedly connected to a rotating disk, and an annular screen cylinder fixedly mounted on the top edge of the rotating disk. This utility model can utilize centrifugal force to accelerate the separation of organic impurities in the raw material, and allows for convenient cleaning of the filtered organic impurities when the equipment is stopped, making it more convenient in practical use.

Description

Technical Field

[0001] This utility model relates to the field of stretch film production technology, and in particular to a device for processing stretch film using a co-extrusion die. Background Technology

[0002] Stretch film is a self-adhesive plastic film mainly used for packaging, fixing, moisture-proofing, dust-proofing, and protection of goods. It is mainly produced and processed by co-extrusion, which refers to the process of extruding two or more different plastic materials through an extruder to form a multi-layered film.

[0003] A search revealed that the utility model patent with authorization announcement number CN221271951 U discloses a co-extrusion device for producing stretch film. The device uses a screen plate in conjunction with a main spring and a support spring to screen the added material and remove organic impurities. Finally, the device removes air bubbles by stirring with a screw rod. Removing air bubbles during the co-extrusion process can effectively prevent quality problems such as uneven film surface, reduced gloss, and decreased strength.

[0004] Although the above scheme of setting up a sieve plate with an eccentric disc can remove organic impurities, the removal efficiency is still not ideal. In addition, during the left and right swinging of the sieve plate, the organic impurities filtered out at the top are easy to fall down due to the movement of the sieve plate, resulting in poor actual performance.

[0005] Therefore, it is necessary to invent an apparatus for processing wound film using a co-extrusion die to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a device for processing wound film through a co-extrusion die head. It can accelerate the separation of organic impurities in raw materials by utilizing centrifugal force. At the same time, it can conveniently clean the filtered organic impurities when the equipment is stopped, making it more convenient in actual use. This solves the problem mentioned in the background art that the removal efficiency of organic impurities is still not ideal. In addition, during the left and right swinging of the sieve plate, the organic impurities filtered from the top are easy to fall down due to the movement of the sieve plate, resulting in poor actual use effect.

[0007] According to one aspect of this disclosure, the following technical solution is provided: an apparatus for processing wound film using a co-extrusion die, comprising:

[0008] An extrusion molding mechanism for extruding and molding a stretch film;

[0009] A raw material pretreatment mechanism includes a fixed frame fixedly sleeved on the outside of a feed cylinder. A rotating shaft is rotatably nested at the lower end of the fixed frame via a bearing. A motor A, which is drively connected to the rotating shaft, is fixedly mounted on the top of the fixed frame. The bottom end of the rotating shaft extends to the inside of the feed cylinder and is fixedly connected to a rotating disk. An annular screen cylinder is fixedly mounted on the top edge of the rotating disk. An annular connecting plate is rotatably connected to the top of the annular screen cylinder via a bearing. The annular connecting plate is fixedly mounted on the inside of the feed cylinder and communicates with a feeding pipe. A push plate is slidably sleeved on the outside of the rotating shaft in a vertical direction and slides against the inner wall of the annular screen cylinder. A pull rod is fixedly mounted on the top right side of the push plate.

[0010] An extrusion shaping assembly for shaping the formed stretch film.

[0011] According to at least one embodiment of the present disclosure, an apparatus for processing a wound film using a co-extrusion die includes an extrusion molding mechanism comprising a fixed base on which a co-extrusion die is fixedly mounted.

[0012] According to at least one embodiment of the present disclosure, an apparatus for processing a wound film using a co-extrusion die head is provided, wherein a feed cylinder is fixedly connected to the feed inlet position at the top of the co-extrusion die head, and a feed pipe is fixedly provided through the rear side of the feed cylinder.

[0013] According to at least one embodiment of the present disclosure, an apparatus for processing a wound film via a co-extrusion die includes an extrusion shaping assembly comprising a mounting frame fixedly disposed on the top left side of a fixed base, wherein a shaping roller A is rotatably nested within the bottom inner side of the mounting frame via a bearing.

[0014] According to at least one embodiment of the present disclosure, an apparatus for processing a wound film using a co-extrusion die is provided, wherein an electric push rod is fixedly disposed on the top of the mounting frame, the output shaft of the electric push rod slides through the mounting frame and is fixedly connected to a lifting frame, a shaping roller B is rotatably nested on the inner side of the lifting frame via bearings, and a motor B that is drively connected to the shaping roller B is fixedly disposed on the rear side.

[0015] According to at least one embodiment of the present disclosure, an apparatus for processing a wound film through a co-extrusion die is provided, wherein guide rods are slidably provided through both sides of the top of the mounting frame in a vertical direction, and the bottom ends of the guide rods are fixedly connected to the lifting frame.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] This invention incorporates a raw material pretreatment mechanism, allowing the raw material to fall into a container formed by a rotating disc and an annular screen cylinder after being output from the feeding pipe. Motor A drives the rotating disc and annular screen cylinder to rotate continuously via a rotating shaft. The centrifugal force generated during rotation causes the raw material to quickly pass through the sieve holes on the annular screen cylinder and enter the feed cylinder, subsequently falling into the co-extrusion die head for processing. Organic impurities remain on the top of the push plate. When the equipment stops, the push plate is pulled by a pull rod, causing it to move upwards along the rotating shaft until it reaches the top of the annular connecting plate. At this point, the organic impurities on the top of the push plate can be easily cleaned. Compared to existing technologies, this invention utilizes centrifugal force to accelerate the separation of organic impurities from the raw material and allows for convenient cleaning of the filtered organic impurities when the equipment stops, making it more convenient in practical use. Attached Figure Description

[0018] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0019] Figure 1 This is a schematic diagram of the overall structure of an apparatus for processing wound film through a co-extrusion die according to one embodiment of the present disclosure.

[0020] Figure 2 This is a schematic diagram of the raw material pretreatment mechanism of an apparatus for processing wound film through a co-extrusion die according to one embodiment of the present disclosure.

[0021] Figure 3 This is a schematic diagram of the extrusion molding component structure of an apparatus for processing wound film through a co-extrusion die according to one embodiment of the present disclosure.

[0022] The specific labels in the attached figures are as follows:

[0023] 1. Extrusion molding mechanism; 11. Fixed base; 12. Co-extrusion die head; 13. Feed barrel; 14. Feed pipe;

[0024] 2. Raw material pretreatment mechanism; 21. Fixed frame; 22. Rotating shaft; 23. Motor A; 24. Rotary disk; 25. Annular screen cylinder; 26. Annular connecting plate; 27. Push plate; 28. Tie rod;

[0025] 3. Extrusion shaping assembly; 31. Mounting frame; 32. Shaping roller A; 33. Electric push rod; 34. Lifting frame; 35. Shaping roller B; 36. Guide rod. Detailed Implementation

[0026] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” other components or features would subsequently be positioned “above” said other components or features. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0027] Figure 1 This is a schematic diagram of the overall structure of an apparatus for processing wound film through a co-extrusion die according to one embodiment of the present disclosure.

[0028] Figure 2 This is a schematic diagram of the raw material pretreatment mechanism 2 of an apparatus for processing wound film through a co-extrusion die according to one embodiment of the present disclosure.

[0029] Figure 3 This is a schematic diagram of the extrusion molding component 3 of an apparatus for processing wound film through a co-extrusion die according to one embodiment of the present disclosure.

[0030] like Figures 1-3 As shown, the apparatus for processing stretch film through a co-extrusion die of this disclosure achieves efficient production of stretch film through a continuous process of raw material pretreatment, extrusion molding, and extrusion shaping, including components such as: extrusion molding mechanism 1, raw material pretreatment mechanism 2, and extrusion shaping assembly 3.

[0031] like Figure 1 As shown in this disclosure, the extrusion molding mechanism 1 includes a fixed base 11 made of high-strength cast iron. The bottom is equipped with a shock-absorbing pad, which can effectively absorb the vibration during equipment operation and avoid affecting the film forming accuracy due to shaking. At the same time, it provides stable support for the co-extrusion die head 12 and the extrusion shaping component 3. The co-extrusion die head 12 is fixedly installed on the top of the fixed base 11. The co-extrusion die head 12 is a technology that has been disclosed in the prior art, so it will not be described in detail here. The feed cylinder 13, made of 304 stainless steel, is fixedly connected to the feed port position at the top of the co-extrusion die head 12. A feed pipe 14 is fixedly installed through the rear side of the feed cylinder 13.

[0032] Therefore, after the raw material is fed into the feed cylinder 13 through the feed pipe 14, the raw material can fall into the co-extrusion die 12 through the feed cylinder 13 for processing.

[0033] like Figure 2 As shown, in a preferred embodiment, the raw material pretreatment mechanism 2 includes a fixed frame 21 fixedly sleeved on the outside of the feed cylinder 13. A rotating shaft 22 is rotatably nested below the end of the fixed frame 21 via a bearing. A motor A23, which is drively connected to the rotating shaft 22, is fixedly mounted on the top of the fixed frame 21. The bottom end of the rotating shaft 22 extends to the inside of the feed cylinder 13 and is fixedly connected to a rotating disk 24. An annular screen cylinder 25 is fixedly mounted on the top edge of the rotating disk 24. An annular connecting plate 26 is rotatably connected to the top of the annular screen cylinder 25 via a bearing to ensure the stability of the annular screen cylinder 25 during rotation. The annular connecting plate 26 is fixedly mounted inside the feed cylinder 13 and communicates with the feed pipe 14. A push plate 27 is slidably fitted on the outer side of the rotating shaft 22 along the vertical direction and slides against the inner wall of the annular screen cylinder 25. The top of the push plate 27 has an annular inclined guide surface that is lower on the inside and higher on the outside. The annular inclined guide surface can make the filtered organic impurities move towards the rotating shaft 22 under the action of gravity, thereby preventing the organic impurities from entering the inner side of the feed pipe 14 when the push plate 27 moves the organic impurities upward. It should also be noted that sealing rings are fixedly nested on both the inner and outer sides of the push plate 27 to seal the gaps between the push plate 27 and the rotating shaft 22 and between the push plate 27 and the annular screen cylinder 25. A pull rod 28 is fixedly installed on the right side of the top of the push plate 27.

[0034] Therefore, after the raw material is output through the feed pipe 14, it falls into the container formed by the rotating disk 24 and the annular screen cylinder 25. At this time, the motor A23 drives the rotating disk 24 and the annular screen cylinder 25 to rotate continuously through the rotating shaft 22. The centrifugal force generated during the rotation causes the raw material to quickly pass through the screen holes on the annular screen cylinder 25 and enter the feed cylinder 13. Then it falls into the co-extrusion die head 12 for processing. Organic impurities are left on the top of the push plate 27. When the equipment stops, the push plate 27 is pulled by the pull rod 28, which causes the push plate 27 to move continuously upward along the rotating shaft 22 until the push plate 27 moves to the top of the inner side of the annular connecting plate 26. At this time, the organic impurities on the top of the push plate 27 can be cleaned more easily. Compared with the existing technology, the centrifugal force can be used to accelerate the separation of organic impurities in the raw material. At the same time, the filtered organic impurities can be cleaned more easily when the equipment stops, which is more convenient in actual use.

[0035] like Figure 3As shown in this disclosure, the extrusion shaping assembly 3 includes a mounting frame 31 fixedly disposed on the top left side of the fixed base 11. A shaping roller A32 is nested inside the bottom of the mounting frame 31 via a bearing. An electric push rod 33 is fixedly disposed on the top of the mounting frame 31. The output shaft of the electric push rod 33 slides through the mounting frame 31 and is fixedly connected to a lifting frame 34. A shaping roller B35 is nested inside the lifting frame 34 via a bearing, and a motor B is fixedly disposed on the rear side and is connected to the shaping roller B35 for transmission. Both the shaping roller A32 and the shaping roller B35 are chrome-plated alloy rollers (diameter 100-150mm) with mirror-polished surfaces (roughness ≤0.02μm) to ensure a smooth and flawless film surface. The shaping roller A32 has a cooling water channel (not shown) that can be circulated with 20-25℃ water to quickly cool the film material for shaping. The top two sides of the mounting frame 31 are equipped with guide rods 36 that slide vertically through it. The bottom end of the guide rods 36 is fixedly connected to the lifting frame 34 so that when it is necessary to adjust the distance between the shaping roller A32 and the shaping roller B35, the electric push rod 33 can drive the lifting frame 34, which is guided by the guide rods 36, to move up or down. This causes the lifting frame 34 to move the shaping roller B35 synchronously to achieve distance adjustment. At the same time, the guide rods 36 can prevent the lifting frame 34 from tilting, ensuring that the parallelism error between the two rollers is ≤0.02mm / m and preventing uneven film thickness.

[0036] Therefore, the stretch film extruded by the co-extrusion die 12 is placed between the shaping rollers A32 and B35 from the right side. Then, the motor B drives the shaping roller B35 to rotate continuously, so that the shaping roller B35 works with the shaping roller A32 to continuously output the stretch film to the left, so that the winding equipment can continuously wind the stretch film. During this process, since the distance between the shaping rollers A32 and B35 is constant, the stretch film is shaped to the preset thickness.

[0037] It should also be noted that any content not described in detail in this specification is prior art known to those skilled in the art.

[0038] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. An apparatus for processing a wrapping film by a co-extrusion die, characterized by, include: An extrusion molding mechanism for extruding and molding a stretch film; A raw material pretreatment mechanism includes a fixed frame fixedly sleeved on the outside of a feed cylinder. A rotating shaft is rotatably nested at the lower end of the fixed frame via a bearing. A motor A, which is drively connected to the rotating shaft, is fixedly mounted on the top of the fixed frame. The bottom end of the rotating shaft extends to the inside of the feed cylinder and is fixedly connected to a rotating disk. An annular screen cylinder is fixedly mounted on the top edge of the rotating disk. An annular connecting plate is rotatably connected to the top of the annular screen cylinder via a bearing. The annular connecting plate is fixedly mounted on the inside of the feed cylinder and communicates with a feeding pipe. A push plate is slidably sleeved on the outside of the rotating shaft in a vertical direction and slides against the inner wall of the annular screen cylinder. A pull rod is fixedly mounted on the top right side of the push plate. An extrusion shaping assembly is used to shape the formed stretch film.

2. The apparatus for processing of a wrapping film by a co-extrusion die according to claim 1, characterized in that: The extrusion molding mechanism includes a fixed base, and a co-extrusion die head is fixedly mounted on the top of the fixed base.

3. The apparatus for processing of a wrapping film by a co-extrusion die according to claim 2, characterized in that: A feed cylinder is fixedly connected to the feed inlet at the top of the co-extrusion die head, and a feed pipe is fixedly installed through the rear side of the feed cylinder.

4. The apparatus for processing of a wrapping film by a co-extrusion die according to claim 3, characterized in that: The extrusion shaping assembly includes a mounting frame fixedly disposed on the top left side of the fixed base, and a shaping roller A is nested inside the bottom of the mounting frame via a bearing.

5. The apparatus for processing of a wrapping film by a co-extrusion die according to claim 4, characterized in that: An electric push rod is fixedly installed on the top of the mounting frame. The output shaft of the electric push rod slides through the mounting frame and is fixedly connected to a lifting frame. A shaping roller B is nested inside the lifting frame via a bearing, and a motor B that is connected to the shaping roller B is fixedly installed on the rear side.

6. The apparatus for processing wound film using a co-extrusion die according to claim 5, characterized in that: Guide rods are slidably installed on both sides of the top of the mounting frame in a vertical direction, and the bottom end of the guide rods is fixedly connected to the lifting frame.

Images