Coating roller and vacuum coating equipment

Abstract

The utility model provides a coating roller and vacuum coating equipment. The coating roller is provided with a containing cavity used for containing cooling liquid and a liquid inlet and outlet communicated with the containing cavity, and the coating roller is provided with a coating surface; the coating surface is a revolution surface, and the generatrix length of the coating surface is [1 + (1 * 10 <-5 >-1 * 10 <-2 >)] times of the length of the coating roller on the axis. According to the technical scheme provided by the utility model, the problem that continuous slender stripes in the MD direction are formed due to the fact that a film coating roller in the prior art is easy to bulge a material to be coated is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum winding coating, in particular to a coating roller and vacuum coating equipment. Background Art

[0002] In the field of vacuum winding coating, the thermal power of the evaporation particles sometimes causes thermal deformation or even damage to the film material. Under this condition, an evaporation roller is generally added to the evaporation area. Its main function is to reduce or eliminate the deformation or damage of the film caused by the evaporation heat through the cooling system inside the roller.

[0003] Among them, smooth and wrinkle-free films such as Figure 1 As shown in the figure, among the thermal deformations that often occur in film materials, there is a type of continuous and elongated MD (machine direction) stripes, such as Figure 2 As shown. The main reason for the formation of this stripe is that the deformation of the film in the TD (transverse direction) caused by thermal stress is suppressed during the coating process. During the deposition process, the heat brought by the vapor or particle deposition will cause the film material to extend in the TD direction, but due to the adsorption effect of the coating roller, the film material will be closely attached to the coating roller, thereby limiting the deformation of the film in the TD direction; the tension in the MD direction makes the film easy to expand in the MD direction. Therefore, if the deposition heat power is too large, the film material is prone to bulge, resulting in the formation of continuous elongated stripes in the MD direction. Utility Model Content

[0004] The main purpose of the utility model is to provide a coating roller and a vacuum coating device to solve the problem in the prior art that the coating roller easily causes the material to be coated to bulge, resulting in the formation of continuous elongated stripes in the MD direction.

[0005] In order to achieve the above-mentioned object, the utility model provides a coating roller, the coating roller has a containing cavity for containing cooling liquid and a liquid inlet and outlet communicated with the containing cavity, the coating roller has a coating surface; the coating surface is a rotating surface, and the generatrix length of the coating surface is [1+(1×10 -5 ~1×10 -2 )] times.

[0006] Furthermore, the generatrix is an arc, which protrudes in a direction away from the axis, wherein a center angle of the arc is less than 180°.

[0007] Furthermore, the generatrix is an arc, and the arc is concave toward the direction of the axis, wherein the center angle of the arc is less than 180°.

[0008] Furthermore, the busbar includes a first arc, a straight line, and a second arc connected in sequence, and the first arc and the second arc are smoothly connected to two ends of the straight line respectively.

[0009] Further, both the first arc and the second arc are recessed in the direction of the axis; on the axis, in the direction from the first arc to the straight line, the distance between the first arc and the axis gradually decreases; on the axis, in the direction from the second arc to the straight line, the distance between the second arc and the axis gradually decreases.

[0010] Further, the coating roller is symmetrically arranged with respect to its own central cross-section, and the central cross-section is perpendicular to the axis.

[0011] According to another aspect of the present invention, the present invention provides a vacuum coating device, including: a frame; a coating material emission source arranged on the frame; the above-mentioned coating roller, and the outlet of the coating material emission source faces the coating roller; an unwinding roller; a winding roller, along the moving direction of the material to be coated, the unwinding roller, the coating roller and the winding roller are arranged in sequence, and the unwinding roller, the coating roller and the winding roller are all rotatably arranged relative to the frame.

[0012] Further, the vacuum coating device further includes a flattening roller rotatably arranged relative to the frame, and along the moving direction of the material to be coated, the flattening roller is located between the unwinding roller and the coating roller.

[0013] Further, the vacuum coating device further includes a guiding roller rotatably arranged relative to the frame, and along the moving direction of the material to be coated, a guiding roller is arranged between the flattening roller and the unwinding roller.

[0014] Further, the vacuum coating device further includes a guiding roller rotatably arranged relative to the frame, and along the moving direction of the material to be coated, a guiding roller is arranged between the coating roller and the winding roller.

[0015] Applying the technical solution of the present invention, by increasing the length of the generatrix of the coating roller (i.e., the main roller), the length of the coating surface on the axis of the coating roller can be increased. In this way, after the material to be coated adheres to the coating roller, the fitting length of the material to be coated in the TD direction with the coating roller can be increased, so as to generate a tensile force on the material to be coated in the TD direction, thereby enabling the material to be coated to deform in the TD direction, which is used to offset or partially offset the deformation of the material to be coated in the TD direction caused by thermal stress. Furthermore, the continuous slender stripes of the vacuum coating product in the MD direction can be reduced, so as to improve the quality of the vacuum coating product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 Shows a schematic diagram of a smooth and wrinkle-free film in the prior art;

[0018] Figure 2Schematic diagram of a thin film with continuous and slender MD stripes in the prior art is shown;

[0019] Figure 3 Schematic structural diagram of the first embodiment of the coating roller of the present invention is shown;

[0020] Figure 4 Schematic structural diagram of the second embodiment of the coating roller of the present invention is shown;

[0021] Figure 5 Schematic structural diagram of the third embodiment of the coating roller of the present invention is shown;

[0022] Figure 6 Schematic structural diagram of the embodiment of the vacuum coating equipment of the present invention is shown.

[0023] Among them, the above-mentioned drawings include the following reference numerals:

[0024] 1, accommodation cavity; 2, generatrix; 21, first arc; 22, straight line; 23, second arc; 3, axis; 5, mid-section; 6, plating material emission source; 7, coating roller; 8, flattening roller; 11, guiding roller. Detailed implementation manners

[0025] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0026] An evaporation coating equipment known to the inventor adds a flattening roller before the film enters the evaporation coating roller, so that the film has a pre-tension in the TD direction. In this way, the deformation in the TD direction caused by the thermal stress can be offset. However, the gap between the flattening roller upstream of the main roller and the main roller weakens the flattening effect of the film in the TD direction, and excessive increase in the function of the flattening roller may cause plastic deformation of the film.

[0027] Therefore, as Figures 3 to 6 shown, the embodiment of the present invention provides a coating roller. The coating roller has an accommodation cavity 1 for accommodating coolant and an inlet and outlet for communicating with the accommodation cavity 1. The coating roller has a coating surface; the coating surface is a revolving surface, and the length of the generatrix 2 of the coating surface is [1 + (1 × 10 -5 ~1 × 10 -2 )] times the length of the coating roller on the axis 3.

[0028] In the above technical solution, by increasing the length of the generatrix 2 of the coating roller (i.e., the main roller), the length of the coating surface on the axis 3 of the coating roller can be increased. In this way, after the material to be coated adheres to the coating roller, the fitting length of the material to be coated in the TD direction with the coating roller can be increased, so as to generate a tensile force on the material to be coated in the TD direction, thereby enabling the material to be coated to deform in the TD direction, which is used to offset or partially offset the deformation of the material to be coated in the TD direction caused by thermal stress, and further reducing the continuous slender stripes of the vacuum coating product in the MD direction, so as to improve the quality of the vacuum coating product.

[0029] It should be noted that in the embodiments of the present invention, the MD (machine direction) is parallel to the moving direction of the material to be coated; the TD (transverse direction) is parallel to the axial direction of the coating roller.

[0030] It should be noted that in the embodiments of the present invention, the generatrix of the coating roller rotates around the axis of the coating roller to form a coating surface.

[0031] Specifically, in the embodiments of the present invention, coolant can be introduced into the accommodating cavity 1 through the liquid inlet and outlet to cool the material to be coated during evaporation coating on the material to be coated, so as to reduce or eliminate film deformation or damage caused by evaporation heat.

[0032] As Figures 3 to 5 shown, in the embodiments of the present invention, the coating roller is symmetrically arranged about its own middle cross-section 5, and the middle cross-section 5 is perpendicular to the axis 3. In this way, the force on both ends of the material to be coated by the coating roller can be made more uniform, so as to avoid damage to the material to be coated due to uneven force.

[0033] It should be noted that in the embodiments of the present invention, the middle cross-section 5 is perpendicular to the axis 3, and the middle cross-section 5 is equidistant from both ends of the coating roller.

[0034] Embodiment 1

[0035] As Figure 3 shown, in Embodiment 1 of the present invention, the generatrix 2 is an arc, and the arc protrudes away from the axis 3, wherein the central angle of the arc is less than 180°.

[0036] Through the above settings, compared with the straight roller in the prior art, the length of the coating surface on the axis of the coating roller can be increased. In this way, after the material to be coated adheres to the coating roller, the fitting length of the material to be coated in the TD direction with the coating roller can be increased, so as to generate a tensile force on the material to be coated in the TD direction, thereby enabling the material to be coated to deform in the TD direction, which is used to offset or partially offset the deformation of the material to be coated in the TD direction caused by thermal stress, and further reducing the continuous slender stripes of the vacuum coating product in the MD direction, so as to improve the quality of the vacuum coating product.

[0037] Example 2

[0038] As Figure 4 shown, the difference between the second embodiment of the present utility model and the first embodiment is that the arc is recessed in the direction of the axis 3.

[0039] Through the above settings, compared with the flat roller in the prior art, the length of the coating surface on the axis of the coating roller can be increased. In this way, after the material to be coated is attached to the coating roller, the fitting length of the material to be coated in the TD direction with the coating roller can be increased, so as to generate a tensile force on the material to be coated in the TD direction, so that the material to be coated can be deformed in the TD direction to offset or partially offset the deformation of the material to be coated in the TD direction caused by thermal stress. Furthermore, the continuous slender stripes of the vacuum coating product in the MD direction can be reduced to improve the quality of the vacuum coating product.

[0040] The other structures of the second embodiment are the same as those of the first embodiment and will not be described herein again.

[0041] Example 3

[0042] As Figure 5 shown, the difference between the third embodiment of the present utility model and the first embodiment is that the generatrix 2 includes a first arc 21, a straight line 22 and a second arc 23 connected in sequence, and the first arc 21 and the second arc 23 are smoothly connected to the two ends of the straight line 22 respectively.

[0043] In the above technical solution, compared with the flat roller in the prior art, in the third embodiment, by setting the first arc 21 and the second arc 23, the length of the coating surface on the axis of the coating roller can be increased. In this way, after the material to be coated is attached to the coating roller, the fitting length of the material to be coated in the TD direction with the coating roller can be increased, so as to generate a tensile force on the material to be coated in the TD direction, thereby reducing the continuous slender stripes of the vacuum coating product in the MD direction to improve the quality of the vacuum coating product.

[0044] As Figure 5 shown, in the third embodiment of the present utility model, both the first arc 21 and the second arc 23 are recessed in the direction of the axis 3; on the axis 3, in the direction from the first arc 21 to the straight line, the distance between the first arc 21 and the axis 3 gradually decreases; on the axis 3, in the direction from the second arc 23 to the straight line, the distance between the second arc 23 and the axis 3 gradually decreases. In this way, while increasing the length of the coating surface on the axis of the coating roller, smooth connection between any two of the first arc 21, the straight line 22 and the second arc 23 can be achieved, so as to facilitate winding of the material to be coated and avoid damaging the material to be coated.

[0045] In one embodiment, the first circular arc 21 and the second circular arc 23 can also both protrude away from the axis 3; on the axis 3, in the direction from the first circular arc 21 to the straight line, the distance between the first circular arc 21 and the axis 3 gradually increases; on the axis 3, in the direction from the second circular arc 23 to the straight line, the distance between the second circular arc 23 and the axis 3 gradually increases. In this way, it is also possible to achieve smooth connection between any two of the first circular arc 21, the straight line 22 and the second circular arc 23 while increasing the length of the coating surface on the axis of the coating roller.

[0046] Other structures of the third embodiment are the same as those of the first embodiment and will not be described in detail here.

[0047] As Figure 6 As shown, an embodiment of the present invention provides a vacuum coating device. The vacuum coating device includes a frame; a coating material emission source 6 disposed on the frame; the above-mentioned coating roller 7, and the outlet of the coating material emission source 6 faces the coating roller 7; an unwinding roller; a winding roller, and along the moving direction of the material to be coated, the unwinding roller, the coating roller 7 and the winding roller are arranged in sequence, and the unwinding roller, the coating roller 7 and the winding roller are all rotatably arranged relative to the frame.

[0048] It should be noted that the film forming methods that can be adopted by the vacuum coating device in the embodiment of the present invention include but are not limited to evaporation coating, sputtering, electron gun, etc.

[0049] The above-mentioned vacuum coating device has all the advantages of the above-mentioned coating roller 7 and will not be described in detail here.

[0050] As Figure 6 As shown, in the embodiment of the present invention, the vacuum coating device further includes a flattening roller 8 rotatably arranged relative to the frame. Along the moving direction of the material to be coated, the flattening roller 8 is located between the unwinding roller and the coating roller 7. In this way, before the material to be coated enters the coating roller 7, the material to be coated can be flattened so that the material to be coated has a pre-tension in the TD direction, so that the deformation in the TD direction caused by the thermal stress can be further offset.

[0051] Specifically, in the embodiment of the present invention, along the moving direction of the material to be coated, a flattening roller 8 is provided between the winding roller and the coating roller 7.

[0052] It should be noted that the specific structure of the flattening roller 8 can adopt the existing technology and will not be described in detail here.

[0053] As Figure 6 As shown, in the embodiment of the present invention, the vacuum coating device further includes a guiding roller 11 rotatably arranged relative to the frame. Along the moving direction of the material to be coated, a guiding roller 11 is provided between the flattening roller 8 and the unwinding roller. In this way, the material to be coated can be guided to move smoothly.

[0054] As shown Figure 6 In the embodiment of the present utility model, the vacuum coating equipment further includes a guiding roller 11 rotatably arranged relative to the frame. Along the moving direction of the material to be coated, a guiding roller 11 is provided between the coating roller 7 and the winding roller. In this way, the material to be coated can be guided to move smoothly.

[0055] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: By increasing the length of the generatrix of the coating roller (i.e., the main roller), the length of the coating surface on the axis of the coating roller can be increased. In this way, after the material to be coated adheres to the coating roller, the fitting length of the material to be coated in the TD direction with the coating roller can be increased, so as to generate a tensile force on the material to be coated in the TD direction, thereby enabling the material to be coated to deform in the TD direction, which is used to offset or partially offset the deformation of the material to be coated in the TD direction caused by thermal stress. Furthermore, the continuous slender stripes of the vacuum coating product in the MD direction can be reduced, so as to improve the quality of the vacuum coating product.

[0056] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A coating roller, characterized in that, The coating roller has a receiving cavity (1) for receiving a coolant and an inlet / outlet port communicating with the receiving cavity (1), and the coating roller has a coating surface; The coated surface is a rotary surface, and the length of the generatrix (2) of the coated surface is [1 + (1 × 10 -5 ~1 × 10 -2 )] times the length of the coating roller on the axis (3).

2. The coating roll according to claim 1, wherein The generatrix (2) is an arc that protrudes away from the axis (3), wherein the central angle of the arc is less than 180°.

3. The coating roller according to claim 1, wherein, The generatrix (2) is an arc that is concave in the direction of the axis (3), wherein the central angle of the arc is less than 180°.

4. The coating roller according to claim 1, characterized in that, The generatrix (2) includes a first arc (21), a straight line (22), and a second arc (23) connected in sequence, and the first arc (21) and the second arc (23) are smoothly connected to the two ends of the straight line (22) respectively.

5. The coating roller according to claim 4, characterized in that, Both the first arc (21) and the second arc (23) are concave in the direction of the axis (3); On the axis (3), in the direction from the first arc (21) to the straight line (22), the distance between the first arc (21) and the axis (3) gradually decreases; On the axis (3), in the direction from the second arc (23) to the straight line (22), the distance between the second arc (23) and the axis (3) gradually decreases.

6. The coating roller according to any one of claims 1 to 5, characterized in that, The coating roller (7) is symmetrically arranged with respect to its own mid-section (5), and the mid-section (5) is perpendicular to the axis (3).

7. A vacuum coating device, characterized in that, Comprising: A frame; A coating material emission source (6) provided on the frame; The coating roller (7) according to any one of claims 1 to 6, and the outlet of the coating material emission source (6) is arranged facing the coating roller (7); An unwinding roller; A winding roller. Along the moving direction of the material to be coated, the unwinding roller, the coating roller (7), and the winding roller are arranged in sequence, and the unwinding roller, the coating roller (7), and the winding roller are all rotatably arranged relative to the frame.

8. The vacuum coating equipment according to claim 7, wherein, The vacuum coating equipment further includes a flattening roller (8) rotatably arranged relative to the frame. Along the moving direction of the material to be coated, the flattening roller (8) is located between the unwinding roller and the coating roller (7).

9. The vacuum coating equipment according to claim 8, characterized in that, The vacuum coating equipment further includes a guiding roller (11) rotatably arranged relative to the frame. Along the moving direction of the material to be coated, the guiding roller (11) is arranged between the flattening roller (8) and the unwinding roller.

10. The vacuum coating equipment according to claim 8, characterized in that, The vacuum coating equipment further includes a guiding roller (11) rotatably arranged relative to the frame. Along the moving direction of the material to be coated, the guiding roller (11) is arranged between the coating roller (7) and the winding roller.

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