Plate film layer pressing equipment and cutting method thereof

Abstract

The invention discloses plate film layer pressing equipment and a cutting method thereof. The pressing equipment comprises a first conveying mechanism, a rolling assembly and a second conveying mechanism which are sequentially arranged in the conveying direction. A rolling gap is formed between the rolling assemblies, and the conveying surface of the first conveying mechanism and the conveying surface of the second conveying mechanism are flush with or lower than the lower edge of the rolling gap; the rolling assembly comprises a first pressing roller and a second pressing roller which are parallel to each other, and the linear speed of the first pressing roller is not equal to the linear speed of the second pressing roller. The film layer is automatically cut by utilizing the rotating speed difference of the two compression rollers and combining the acting force of a plate on the film layer.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum plate lamination, and in particular to a plate film layer laminating device and a cutting method thereof. Background Art

[0002] In the field of aluminum plate coating technology, hot pressing coating is currently usually used to coat the surface of the aluminum plate with films. Existing hot pressing equipment uses a pressing roller to press the aluminum plate and the film layer by heating, and a cutting mechanism is set at the unloading end of the hot pressing equipment to cut the film layer. The cutting methods used in traditional hot pressing equipment are hot melt cutting or blade cutting. Both cutting methods require the aluminum plate to be briefly paused during the cutting process, resulting in slow cutting speed and low cutting efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a plate film layer lamination device and a cutting method thereof to improve the film material cutting efficiency.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A sheet film lamination device comprises a first conveying mechanism, a rolling assembly and a second conveying mechanism which are sequentially arranged along a conveying direction; There is a rolling gap between the rolling components, and the conveying surface of the first conveying mechanism and the conveying surface of the second conveying mechanism are flush with or lower than the lower edge of the rolling gap; The rolling assembly comprises a first pressing roller and a second pressing roller which are parallel to each other, and the linear speed of the first pressing roller is not equal to the linear speed of the second pressing roller.

[0005] In order to solve the above technical problems, another technical solution adopted by the present invention is: A cutting method used in the above-mentioned sheet film layer lamination device comprises the following steps: S1: The film layer is covered on the surface of the plate by hot pressing; S2: applying traction forces of different strengths to both sides of the plate in the thickness direction, and cutting the film layer between two plates arranged sequentially along the conveying direction.

[0006] The beneficial effects of the present invention are as follows: the first conveying mechanism and the second conveying mechanism are used to convey the aluminum plate, so that the aluminum plate is sent into the rolling gap for rolling. At the same time, since the linear speed of the first pressing roller is not equal to the linear speed of the second pressing roller, the first pressing roller and the second pressing roller form an unbalanced traction force, and after the film layer is separated from the aluminum plate, it will be directly cut off under the action of the unbalanced traction force. During the process of the film layer being cut off, the aluminum plate is continuously conveyed without pausing. Compared with the prior art, it can replace the cutting mechanism and reduce the cutting steps, so that the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of the pressing device in the present invention; Figure 2 A partial cross-sectional view of the pressing device of the present invention; Figure 3 The working principle of the pressing device in the present invention is shown in FIG. Figure 1 (When the previous sheet enters the rolling gap); Figure 4 The working principle of the pressing device in the present invention is shown in FIG. Figure 2 (When the last sheet enters the rolling gap).

[0008] Description of labels: 1. First conveying mechanism; 2. Rolling assembly; 21. Rolling gap; 22. First pressing roller; 23. Second pressing roller; 3. Second conveying mechanism; 4. Film layer; 5. Plate material; 6. Release paper; 7. Feeding roller. DETAILED DESCRIPTION

[0009] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0010] Please refer to Figure 1-Figure 4 A sheet film lamination device comprises a first conveying mechanism 1, a rolling assembly 2 and a second conveying mechanism 3 arranged in sequence along a conveying direction; a rolling gap 21 is provided between the rolling assemblies 2, and the conveying surface of the first conveying mechanism 1 and the conveying surface of the second conveying mechanism 3 are flush with or lower than the lower edge of the rolling gap 21; the rolling assembly 2 comprises a first pressing roller 22 and a second pressing roller 23 which are parallel to each other, and the linear speed of the first pressing roller 22 is not equal to the linear speed of the second pressing roller 23. Preferably, the linear speed of the first pressing roller 22 is less than the linear speed of the second pressing roller 23.

[0011] The first pressing roller 22 and the second pressing roller 23 rotate in opposite directions (see Figure 2 The direction indicated by the arc arrow in the middle). It is worth noting that Figure 2 The direction indicated by the straight arrow is the transmission direction.

[0012] It can be understood that the first conveying mechanism 1 and the second conveying mechanism 3 are used to convey the plate 5, so that the plate 5 is sent into the rolling gap 21 for rolling. At the same time, since the linear speed of the first pressing roller 22 is not equal to the linear speed of the second pressing roller 23, the first pressing roller 22 and the second pressing roller 23 form an unbalanced traction force, and the film layer 4 will be directly cut off under the action of the unbalanced traction force after separation from the plate 5. During the process of cutting the film layer 4, the plate 5 is continuously conveyed without stopping. Compared with the prior art, it can replace the cutting mechanism and reduce the cutting steps, so that the production efficiency is improved.

[0013] Specifically, the surfaces of the first conveying mechanism 1 and the second conveying mechanism 3 are covered with release paper 6, and the two ends of the release paper 6 are pulled by other mechanisms, and the plate 5 is placed on the release paper 6 for conveyance. When the plate 5 enters the rolling gap 21, it is actually the film layer 4, the plate 5 and the release paper 6 that enter the rolling gap 21 together. When the plate 5 leaves the rolling gap 21, the film layer 4 and the release paper 6 are bonded in the rolling gap 21, and the traction force of the second pressing roller 23 on the film layer 4 is actually acting on the release paper 6. The release paper 6 and the first pressing roller 22 cooperate to form an unbalanced traction force on both sides of the film layer 4, thereby breaking the film layer 4.

[0014] In some embodiments, the diameter of the first roller 22 is less than or equal to the diameter of the second roller 23. The following relationship exists between the linear velocity (v), the angular velocity (w) and the roller radius (r): v=w×r. When the diameter of the first roller 22 is greater than the diameter of the second roller 23, the linear velocity of the first roller 22 will be greater than the linear velocity of the second roller 23, and the roller with a larger linear velocity will generate a greater traction force; when the diameter of the first roller 22 is equal to the diameter of the second roller 23, the angular velocity of the first roller 22 and the second roller 23 can be controlled to form a speed difference, that is, the angular velocity of the first roller 22 is greater than the angular velocity of the second roller 23, thereby making the linear velocity of the first roller 22 greater than the linear velocity of the second roller 23, which can also generate unbalanced traction forces on both sides of the film layer 4 and cause the film layer 4 to break. The cutting speed and the flatness of the film layer also depend on the strain rate. The strain rate is positively correlated with the difference between the linear speeds of the first roller and the second roller, that is, the greater the difference between the linear speeds of the first roller and the second roller, the faster the strain rate, the faster the film cutting speed, and the smoother the cross section of the film layer. Taking a PVC film with a thickness of 0.05 mm as an example, the difference between the linear speeds of the first roller 22 and the second roller 23 should be greater than or equal to 0.55 m / min. Further, the difference between the linear speeds of the first roller 22 and the second roller 23 is 0.55 m / min to 0.9 m / min.

[0015] In some embodiments, the size of the rolling gap 21 is -0.4~0.4mm. Among them, the situation that the rolling gap 21 is a negative value is due to the increase in rolling pressure, which causes the surfaces of the first pressing roller 22 and the second pressing roller 23 to deform accordingly. The size of the rolling gap 21 should not be too large to ensure that after the plate 5 moves out of the rolling gap 21, the film layer 4 can be bonded with the release paper 6, and the release paper 6 and the first pressing roller 22 simultaneously apply traction to the film layer 4 to ensure the reliability of the film layer 4 cutting. Specifically, since the pressure setting value of the first pressing roller 22 is relatively large, after the plate 5 leaves the rolling gap 21, the first pressing roller 22 can apply pressure to the film layer 4 so that the film layer 4 contacts the release paper 6. Preferably, the size of the rolling gap 21 is -0.1mm to ensure that there is a good pressing force between the plate 5 and the film layer 4.

[0016] In some embodiments, the first pressing roller 22 and the second pressing roller 23 are arranged in sequence in the vertical direction so that the cutting position of the film layer 4 is close to the plate 5 after lamination, thereby reducing the waste of the film layer 4 and ensuring that the pressure applied by the first pressing roller 22 acts vertically on the second pressing roller 23 to ensure the pressing force between the first pressing roller 22 and the second pressing roller 23.

[0017] In some embodiments, both the first pressing roller 22 and the second pressing roller 23 are rubber rollers. Selecting rubber rollers to press and convey the sheet 5 can increase the friction between the first pressing roller 22 and the film layer 4, and the friction between the second pressing roller 23 and the release paper 6. Preferably, the release paper 6 does not slip between the second pressing roller 23 during the conveying process, that is, at least the linear speed of the contact portion of the release paper 6 and the second pressing roller 23 is consistent with that of the second pressing roller 23, so that the release paper 6 cooperates with the first pressing roller 22 to jointly apply traction forces of different strengths on both sides of the film layer 4.

[0018] In some embodiments, a feeding roller 7 is further included; the feeding roller 7 is located on the side of the rolling assembly 2 close to the first conveying mechanism 1, and the plane where the axis of the feeding roller 7 is located is higher than the plane where the top of the rolling assembly 2 is located. The feeding roller 7 is set to place the film layer 4, and cooperate with the first pressing roller 22 to keep the film layer 4 in a tensioned state, which is convenient for subsequent cutting, and can quickly cover the surface of the plate 5 with the film layer 4 when the plate 5 passes through the rolling gap 21.

[0019] In some embodiments, a heating assembly is further included; the first pressing roller 22 and the second pressing roller 23 are electrically connected to the heating assembly respectively. The heating assembly is configured to heat the first pressing roller 22 and the second pressing roller 23, so that the first pressing roller 22 and the second pressing roller 23 are heated in the process of covering the film layer 4 on the surface of the plate 5, thereby improving the connection tightness between the film layer 4 and the release paper 6 and the plate 5.

[0020] A cutting method applied to the above-mentioned sheet film laminating equipment, comprising the following steps: S1: The film layer 4 is covered on the surface of the sheet 5 by means of hot pressing; S2: Different traction forces are applied to both sides of the sheet 5 in the thickness direction, and the film layer 4 is cut between two sheets 5 arranged in sequence along the conveying direction. Specifically, the magnitude of the traction force is positively correlated with the linear velocity of the pressure roller, that is, the greater the linear velocity of the pressure roller, the greater the traction force.

[0021] The above-mentioned sheet 5 is an aluminum sheet. In other equivalent embodiments, the sheet 5 can also be other rigid sheets 5.

[0022] It can be understood that by means of hot pressing, the film layer 4 can be closely attached to the surface of the sheet 5, so that after the sheet 5 leaves the rolling gap 21, the film layer 4 is always pulled. And when the sheet 5 completely leaves the rolling gap 21, the moving speed of the sheet 5 completely depends on the moving speed of the release paper 6, and the moving speed of the release paper 6 is consistent with that of the second pressure roller 23, so that the film layer 4 located between the rolling gaps 21 is cut off under the combined action of the sheet 5, the first pressure roller 22 and the second pressure roller 23.

[0023] In some embodiments, in step S1: The top surface of the sheet 5 is covered with the film layer 4, the bottom surface of the sheet 5 is attached with the release paper 6, and the release paper 6 pulls the sheet 5 to move. Specifically, the film layer 4 and the release paper 6 are respectively covered on two surfaces of the sheet 5 in the thickness direction by means of hot pressing.

[0024] In some embodiments, in step S2, the distance between two sequentially arranged sheets 5 is 1 mm to 5 mm. The cutting speed of the film layer 4 is related not only to the difference in the linear velocities of the two pressure rollers, but also to the distance between the two sheets. When the distance between two sequentially arranged sheets 5 is smaller, the acting time of the unbalanced traction force on the film layer 4 is shorter. Combining the reverse acting forces of the edges of the two sheets 5 on the film layer 4, the cut surface of the film layer 4 after cutting is smoother, and the waste of the film layer 4 can be reduced. Specifically, at the moment when the previous sheet 5 leaves the rolling gap 21, due to the pressing of the first pressure roller 22, the film layer 4 quickly contacts the release paper 6. At this time, the unbalanced traction force acts on the film layer 4. If the distance between the two sheets 5 is smaller, the edges of the two sheets 5 will jointly support the film layer 4, which will reduce the contact area between the film layer 4 and the release paper 6, make the shear stress more concentrated, and thus make the cut surface of the film layer 4 smoother; on the contrary, if the distance between the two sheets 5 is larger, the flatness of the cut surface of the film layer 4 after cutting will be worse.

[0025] In some embodiments, the traction force on the top surface of the sheet 5 is smaller than the traction force on the bottom surface of the sheet 5. The formation of the traction force difference is to pull the film layer 4 at the moment when the sheet 5 leaves the rolling gap 21, so that the film layer 4 is automatically cut under the action of the unbalanced traction force. Specifically, the traction force on the top surface of the sheet 5 is smaller than the traction force on the bottom surface of the sheet 5, that is, the linear speed of the first pressing roller 22 is smaller than the linear speed of the second pressing roller 23.

[0026] Embodiment 1 of the present invention is: A sheet film layer lamination device comprises a first conveying mechanism 1, a rolling assembly 2 and a second conveying mechanism 3 which are sequentially arranged along a conveying direction; a rolling gap 21 is provided between the rolling assemblies 2, and a conveying surface of the first conveying mechanism 1 and a conveying surface of the second conveying mechanism 3 are flush with a lower edge of the rolling gap 21; the rolling assembly 2 comprises a first pressing roller 22 and a second pressing roller 23 which are parallel to each other, and a linear speed of the first pressing roller 22 is less than a linear speed of the second pressing roller 23.

[0027] In this embodiment, the surfaces of the first conveying mechanism 1 and the second conveying mechanism 3 are covered with release paper 6 , and both ends of the release paper 6 are pulled by other mechanisms, and the plate 5 is placed on the release paper 6 for conveyance.

[0028] In this embodiment, the diameter of the first pressing roller 22 is smaller than the diameter of the second pressing roller 23 , and the angular velocities of the first pressing roller 22 and the second pressing roller 23 are equal.

[0029] In this embodiment, the first pressing roller 22 and the second pressing roller 23 are arranged in sequence in the vertical direction, and both the first pressing roller 22 and the second pressing roller 23 are rubber rollers. The radius of the first pressing roller 22 is 122 mm, and the radius of the second pressing roller 23 is 125 mm.

[0030] In this embodiment, the size of the rolling gap 21 is -0.1 mm.

[0031] In this embodiment, a feeding roller 7 is further included; the feeding roller 7 is located on a side of the rolling assembly 2 close to the first conveying mechanism 1 , and the plane where the axis of the feeding roller 7 is located is higher than the plane where the top of the rolling assembly 2 is located.

[0032] In this embodiment, a heating component is also included; the first pressing roller 22 and the second pressing roller 23 are electrically connected to the heating component respectively.

[0033] Embodiment 2 of the present invention is: A cutting method used in the first embodiment comprises the following steps: S1: The top surface of the plate 5 is covered with a film layer 4, and the bottom surface of the plate 5 is adhered with a release paper 6, and the plate 5 is pulled to move by the release paper 6; the film layer 4 and the release paper 6 are respectively covered on the two surfaces of the plate 5 in the thickness direction by hot pressing; wherein the film layer 4 is a transparent film with a thickness of 0.05 mm, such as a PVC film.

[0034] S2: Apply different traction forces to both sides of the sheet 5 in the thickness direction, and cut the film layer 4 between two sheets 5 arranged in sequence along the conveying direction. The traction force on the top surface of the sheet 5 is smaller than the traction force on the bottom surface of the sheet 5. The traction force on the top surface of the sheet 5 comes from the first pressing roller 22, and the pressure on the bottom surface of the sheet 5 comes from the release paper 6, that is, the second pressing roller 23. Since the generation of traction force is related to the linear speed of the pressing roller, preferably, the difference between the linear speeds of the first pressing roller 22 and the second pressing roller 23 is 0.6 m / min. Preferably, the spacing between the two sheets 5 is 2 mm.

[0035] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sheet film lamination device, characterized in that: It includes a first conveying mechanism, a rolling assembly and a second conveying mechanism which are sequentially arranged along a conveying direction; There is a rolling gap between the rolling components, and the conveying surface of the first conveying mechanism and the conveying surface of the second conveying mechanism are flush with or lower than the lower edge of the rolling gap; The rolling assembly comprises a first pressing roller and a second pressing roller which are parallel to each other, and the linear speed of the first pressing roller is not equal to the linear speed of the second pressing roller.

2. The sheet film lamination device according to claim 1, characterized in that: The diameter of the first pressing roller is smaller than or equal to the diameter of the second pressing roller.

3. The sheet film lamination device according to claim 1, characterized in that: The size of the rolling gap is -0.4~0.4mm.

4. The sheet film lamination equipment according to claim 1, characterized in that: The difference between the linear speeds of the first pressing roller and the second pressing roller is 0.5 m / min to 0.9 m / min.

5. The sheet film lamination equipment according to claim 1, characterized in that: Also includes a feeding roller; The feeding roller is located at a side of the rolling assembly close to the first conveying mechanism, and the plane where the axis of the feeding roller is located is higher than the plane where the top of the rolling assembly is located.

6. The sheet film lamination device according to claim 1, characterized in that: Also included is a heating assembly; The first pressing roller and the second pressing roller are electrically connected to the heating assembly respectively.

7. A cutting method used in the sheet film lamination equipment as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1: The film layer is covered on the surface of the plate by hot pressing; S2: applying traction forces of different strengths to both sides of the plate in the thickness direction, and cutting the film layer between two plates arranged sequentially along the conveying direction.

8. A cutting method according to claim 7, characterized in that: In the step S1 : the top surface of the plate is covered with a film layer, the bottom surface of the plate is adhered with a release paper, and the plate is pulled to move by the release paper.

9. A cutting method according to claim 7, characterized in that: In step S2, the spacing between two plates arranged sequentially is 1 mm to 5 mm.

10. A cutting method according to claim 8, characterized in that: The traction force of the top surface of the plate is smaller than the traction force of the bottom surface of the plate.

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