CN217967201U - Film cutting knife wheel and film cutting equipment - Google Patents

Abstract

The application relates to a film cutting knife wheel and a film cutting device. The film cutting knife wheel includes: the cutter head is provided with two disc surfaces which are oppositely arranged along the axial direction of the film cutting knife wheel; the cutting part is connected between the radial outer edges of the two disc surfaces and is provided with two cutting surfaces, the two cutting surfaces are inclined relative to the axial direction of the film cutting knife wheel, and the radial outer edges of the two cutting surfaces are intersected to form a cutting edge of the film cutting knife wheel; wherein the angle A between the two cutting surfaces ranges from 135 degrees to 179 degrees so as to prevent the film cutting knife wheel from cutting the substrate when cutting the film carried on the substrate. Based on this, it is possible to prevent the substrate for the carrier film from being damaged when the film is cut.

Description

Film cutting knife wheel and film cutting equipment

Technical Field

The application relates to the technical field of machining cutters, in particular to a film cutting cutter wheel and film cutting equipment.

Background

Some films for display panels need to be placed on a substrate and cut by a slitting knife wheel to obtain films of desired size and gauge. The resulting film is cut and subsequently laminated to a substrate of a display panel.

In the related art, when a film on a substrate is cut by a film cutting knife wheel, the substrate is easily damaged, scrap dust is caused, film pollution is caused, and the subsequent use of the film is influenced.

Therefore, it has been difficult to prevent the substrate from being damaged when the film is cut.

Disclosure of Invention

The present application aims to provide a film cutting cutter wheel and a film cutting apparatus to prevent a substrate for carrying a film from being damaged when the film is cut.

In order to solve the above technical problem, the present application provides a film cutting wheel for cutting a film for a display panel carried on a substrate, comprising:

the cutter head is provided with two disc surfaces which are oppositely arranged along the axial direction of the film cutting knife wheel; and

the cutting part is connected between the radial outer edges of the two disc surfaces and is provided with two cutting surfaces, the two cutting surfaces are inclined relative to the axial direction of the film cutting knife wheel, and the radial outer edges of the two cutting surfaces are intersected to form a cutting edge of the film cutting knife wheel;

wherein the angle A between the two cutting surfaces ranges from 135 degrees to 179 degrees so as to prevent the film cutting knife wheel from cutting the substrate when cutting the film carried on the substrate.

In some embodiments, the angle a between the two cutting surfaces is greater than or equal to 135 ° and less than 160 °; alternatively, the angle a between the two cut surfaces is greater than 160 ° and less than or equal to 179 °.

In some embodiments, the angle a between the two cutting faces is greater than or equal to 150 ° and less than 160 °; alternatively, the angle a between the two cut surfaces is greater than 160 ° and less than or equal to 170 °.

In some embodiments, both disk faces have an active section, the active section being a portion of the disk face for contacting the membrane, the angle B between the active sections of the two disk faces being less than or equal to 120 °.

In some embodiments, the angle B between the active segments of two disk faces is greater than or equal to 0 ° and less than 60 °, or the angle B between the active segments of two disk faces is greater than 60 ° and less than 100 °.

In some embodiments, the angle B between the active segments of the two disk faces is greater than or equal to 0 ° and less than or equal to 59 °; alternatively, the angle B between the active sections of the two disk surfaces is greater than or equal to 61 ° and less than or equal to 99 °.

In some embodiments, the axial distance T between the radially inner edges of the two cutting faces is between 2um and 100um.

In some embodiments, the axial distance T between the radially inner edges of the two cutting faces is 2um to 19um or 21um to 99um.

In some embodiments, the axial distance T between the radially inner edges of the two cutting faces is 10um to 19um.

In some embodiments, two quotations all include and connect face and first inclined plane, connect the first end of face and be connected with first inclined plane, connect the second end of face and be connected with the cutting plane, first inclined plane is for the axial slope of film cutting break bar, wherein:

on the longitudinal section of the film cutting knife wheel, the molded line of the connecting surface is superposed with a connecting line between the radial outer edge of the first inclined surface and the radial inner edge of the cutting surface; alternatively, the first and second electrodes may be,

on the longitudinal section of the film cutting knife wheel, the part between the first end and the second end of the connecting surface is positioned on the radial inner side of a connecting line between the radial outer edge of the first inclined surface and the radial inner edge of the cutting surface, so that an avoiding part is arranged between the first inclined surface and the cutting surface.

In some embodiments, the first end of the connection surface coincides with the radially outer edge of the first ramp surface, or the first end of the connection surface is located radially inward of the radially outer edge of the first ramp surface.

In some embodiments, the second end of the connection surface coincides with, or is located radially inward of, the radially inner edge of the cutting surface.

In some embodiments, the attachment surface is parallel to the axial direction of the cutter wheel, or the attachment surface is inclined with respect to the axial direction of the cutter wheel.

In some embodiments, the profile of the connecting surface is a straight line or a curve on the longitudinal section of the film cutting wheel.

In some embodiments, in a longitudinal section of the cutter wheel, the profile of the connecting surface is an arc line which is concave towards the radial inner side.

In some embodiments, the two cutting faces are smooth faces.

The film cutting equipment provided by the application is used for cutting a film for a display panel, and comprises a substrate for bearing the film and the film cutting knife wheel in any embodiment of the application.

In some embodiments, the substrate is made of glass or ceramic.

The angle A between the two cutting surfaces of the cutting part is set to be 135-179 degrees, so that the substrate used for bearing the film can be prevented from being damaged when the film is cut, and the film is prevented from being polluted by chip dust generated by cutting when the film is cut, and the subsequent use of the film is influenced.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a perspective view of a cutter wheel for cutting a film according to a first embodiment of the present application.

Fig. 2 is a side view of a slitting wheel according to a first embodiment of the present application.

Fig. 3 is an enlarged view of part I of fig. 2.

Fig. 4 is a schematic view of the operation state of the cutter wheel for cutting film in the first embodiment of the present application.

Fig. 5 is a partially enlarged view of II of fig. 4.

Fig. 6 is a perspective view of a cutter wheel for cutting a film according to a second embodiment of the present application.

FIG. 7 is a side view of a slitting wheel according to a second embodiment of the present application.

Fig. 8 is a partially enlarged schematic view of III of fig. 7.

Fig. 9 is a partially enlarged view illustrating the operation of the cutter wheel for cutting a film according to the second embodiment of the present application.

FIG. 10 is a side view of a slitting wheel according to a third embodiment of the present application.

Fig. 11 is an enlarged partial view of IV of fig. 10.

FIG. 12 is a side view of a slitting wheel according to a fourth embodiment of the present application.

Fig. 13 is a partially enlarged view of V of fig. 12.

FIG. 14 is a side view of a slitting wheel according to a fifth embodiment of the present application.

Fig. 15 is a partially enlarged view VI of fig. 14.

Description of reference numerals:

10. a film cutting knife wheel; 20. a film; 30. a substrate;

1. a cutter head; 11. a dish surface; 12. an outer end face; 13. a central bore; 14. a tray body; 15. a first inclined plane; 16. a connection face; 17. a first transition surface; 18. a second transition surface; 19. a second inclined plane; 1a, an action section;

2. a cutting section; 21. cutting a surface; 22. a cutting edge;

3. an avoidance part;

5. and (6) connecting the wires.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present disclosure.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In the description of the present application, it should be understood that the terms "first," "second," and the like are used for limiting the components, and are used only for the convenience of distinguishing the corresponding components, and if not otherwise stated, the above terms do not have special meanings, and therefore, should not be construed as limiting the scope of the present application.

In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

The cutter wheel is a processing cutter for cutting an article to be cut, which cuts a slit in the article to be cut and vertically breaks the article to be cut along the slit to cut the article to be cut in a desired size and shape.

With the rapid development of 3C products such as mobile phones, the cutter wheel is widely applied to the production of display panels. When applied to a display panel production process, a cutter wheel is typically used to cut a substrate (e.g., a glass plate) and/or a film (typically a film inside a display panel, and typically a flexible film) of a display panel.

Among them, with the rapid development of novel display technologies such as micro LEDs, the cutter wheel is increasingly applied to the cutting of films for display panels. As one of the cutting methods of a film for a display panel, a film is placed on a substrate made of a brittle material such as glass or ceramic, and a film cutter wheel cuts the film carried on the substrate, and then the cut film is removed from the substrate and laminated on a substrate (e.g., a glass plate) of the display panel.

In the above film cutting process, the cutter wheel is required to cut only the film, not the substrate, because the substrate is only a carrier (or support) in the film cutting process, which is not used together with the film for manufacturing the display panel, and if the substrate is cut together, the dust generated from the substrate in the cutting process may contaminate the film, affect the subsequent use of the film, and increase the rejection rate.

However, in the related art, the knife flywheel cannot well meet the requirement of "only cutting the film without cutting the substrate", and often the condition that the substrate is damaged when the film is cut occurs, which seriously affects the cutting effect of the film and the normal production of the display panel, limits the application of the knife flywheel in the film cutting technology, and affects the popularization of the novel display technology.

To the above circumstances, the present application provides a film cutting break bar (i.e. break bar for cutting film) to avoid when cutting the film, damage the substrate that is used for the carrier film, and then promote the popularization of the application of break bar in the film cutting technique and novel display technique.

Fig. 1-15 show exemplary configurations of the slitting wheels of the present application.

Referring to fig. 1 to 5, in the present application, a film cutter wheel 10 for cutting a film 20 for a display panel carried on a substrate 30 includes a cutter head 1 and a cutting part 2. The cutter head 1 has two disk surfaces 11, which disk surfaces 11 are arranged opposite to each other in the axial direction of the cutter wheel 10. The cutting part 2 is connected between the radial outer edges of the two disc surfaces 11 and is provided with two cutting surfaces 21, the two cutting surfaces 21 are inclined relative to the axial direction of the cutter wheel 10, and the radial outer edges of the two cutting surfaces 21 are intersected to form a cutting edge 22 of the cutter wheel 10. Wherein an angle a (indicated in fig. 3) between the two cut surfaces 21 ranges from 135 ° to 179 ° to prevent the cutter wheel 10 from cutting the substrate 30 when cutting the film 20 carried on the substrate 30.

It has been found through research that an important factor influencing whether the cutter wheel 10 cuts the substrate 30 together when cutting the film 20 is that the angle a between the two cutting surfaces 21 of the cutting part 2 is small, and if the angle a between the two cutting surfaces 21 is too small, the cutting part 2 cut into the film 20 generates a large pressure on the substrate 30, which causes damage to the substrate 30, generates dust and debris, and causes contamination of the film 20.

Based on the above research, the present application sets the angle a between the two cutting surfaces 21 of the cutting part 2 to 135 ° to 179 °, and it is found that, in this case, the size of the angle a between the two cutting surfaces 21 is suitable, so that the film 20 can be cut smoothly, and after the film 20 is cut, only a small pressure that does not damage the substrate 30 is generated to the substrate 30, so that when the film cutter wheel 10 cuts the film 20 carried on the substrate 30, even after contacting the substrate 30 located below the film 20, the substrate 30 is not damaged, so that only the film 20 can be cut, and the substrate 30 located below the film 20 is not cut, so that the substrate 30 carrying the film 20 can be prevented from being damaged when the film 20 is cut, and the substrate 30 is prevented from being cut to generate debris and dust when the film 20 is cut, so that the film 20 is prevented from being contaminated, and the subsequent use of the film 20 is not influenced, thereby promoting the application of the cutter wheel in the film cutting technology and the popularization of the novel display technology.

The angle a between the two cut surfaces 21 ranges from 135 ° to 179 °, meaning that the angle a between the two cut surfaces 21 is greater than or equal to 135 ° and less than or equal to 179 °. As an example, in some embodiments, the angle a between the two cutting surfaces 21 is greater than or equal to 135 ° and less than 160 °, e.g., the angle a between the two cutting surfaces 21 is greater than or equal to 150 ° and less than 160 °. As a further example, in some embodiments, the angle a between two cutting surfaces 21 is greater than 160 ° and less than or equal to 179 °, for example, the angle a between two cutting surfaces 21 is greater than 160 ° and less than or equal to 170 °. The cutting part 2 having the corresponding angle a has a good cutting effect on the film 20, and can reliably prevent the substrate 30 from being damaged during the film cutting process.

In general, referring to fig. 5 and 9, when the film 20 is cut, all of the two cut surfaces 21 cut into the film 20 to be in contact with the film 20, and at the same time, a part of the two disk surfaces 11 adjacent to the cutting part 2 also cuts into the film 20 together with the cutting part 2 to be in contact with the film 20. For convenience of description, the portions of the two disk surfaces 11 for contact with the film 20 are referred to as active segments 1a, that is, the active segments 1a are the portions of the disk surfaces 11 for contact with the film 20. Both disc faces 11 have an active section 1a. Since the cutter wheel 10 cuts only the film 20 and does not cut the substrate 30 in the present application, the active segment 1a is in contact with only the film 20 and not the substrate 30 during the cutting process.

The angle B (indicated in fig. 3) between the active sections 1a of the two disk surfaces 11 can be the same as or different from the angle a between the two cutting surfaces 21. When the angle B between the active sections 1a of the two disk surfaces 11 is the same as the angle a between the two cutting surfaces 21, the cutter wheel 10 may be referred to as a single-angle cutter wheel. And when the angle B between the action sections 1a of the two disc surfaces 11 is different from the angle a between the two cutting surfaces 21, the cutter wheel 10 may be referred to as a double-angle cutter wheel. Wherein, when the film cutting knife flywheel 10 is a dual-angle film cutting knife flywheel, the cutting of the film 20 is more facilitated, and especially, the cutting effect of the film 20 is improved by conveniently matching with the angle A through the size of the design angle B.

For example, referring to fig. 1-15, in some embodiments, the angle B (labeled in fig. 3) between the active segments 1a of the two disk faces 11 is less than or equal to 120 °. Specifically, in some embodiments, the angle B between the active sections 1a of the two disk faces 11 is greater than or equal to 0 ° and less than 60 °, or the angle B between the active sections 1a of the two disk faces 11 is greater than 60 ° and less than 100 °. More specifically, in some embodiments, the angle B between the active sections 1a of the two disk faces 11 is greater than or equal to 0 ° and less than or equal to 59 °; alternatively, the angle B between the active sections 1a of the two disk surfaces 11 is greater than or equal to 61 ° and less than or equal to 99 °.

In the above arrangement, the angle B between the two action segments 1a is suitable, and when the film 20 is cut, a pressure with a suitable size can be applied to the film 20, so that the two action segments 1a can smoothly cut the film 20 together with the cutting part 2, and in the process of cutting the film 20, the edge of the film 20 is not easily protruded and warped due to excessive extrusion deformation, the damage of the film 20 in the cutting process is reduced, and the smooth cutting process of the film 20 with small damage to the edge of the film and without damaging the substrate 30 is realized.

In the foregoing embodiments, the axial distance T (indicated in fig. 3) between the radially inner edges of the two cut surfaces 21 is 2um to 100um. By way of example, in some embodiments, the axial distance T between the radially inner edges of the two cutting surfaces 21 is 2um to 19um or 21um to 99um, for example, the axial distance T between the radially inner edges of the two cutting surfaces 21 is 10um to 19um.

Based on the above setting, the axial distance T (the thickness of corresponding cutting part 2) between the radial inner edges of two cutting surfaces 21 is comparatively suitable, can realize better cutting effect, effectively reduces under the condition of membrane edge damage for cutting part 2 has higher intensity, is difficult for the rupture.

In the present application, the structural form of the two disk surfaces 11 may be various.

For example, referring to fig. 1-5, in some embodiments, each of the two disk surfaces 11 includes a connecting surface 16 and a first inclined surface 15, a first end of the connecting surface 16 is connected to the first inclined surface 15, a second end of the connecting surface 16 is connected to a cutting surface 21, the first inclined surface 15 is inclined with respect to the axial direction of the film cutting wheel 10, and, in a longitudinal section of the film cutting wheel 10, a profile of the connecting surface 16 coincides with a connecting line 5 between a radially outer edge of the first inclined surface 15 and a radially inner edge of the cutting surface 21. The connecting line 5 between the radial outer edge of the first inclined surface 15 and the radial inner edge of the cutting surface 21 is actually an extension line of the profile of the first inclined surface 15 on the longitudinal section, which faces the radial inner edge of the cutting surface 21, and corresponds to an extension plane of the radial inner edge of the first inclined surface 15, which faces the cutting surface 21. Since the profile of the connecting surface 16 coincides with the line 5 between the radially outer edge of the first inclined surface 15 and the radially inner edge of the cutting surface 21 in the longitudinal section of the film cutting wheel 10, as shown in fig. 5, the profile of the connecting surface 16 coincides with the profile of the first inclined surface 15 in the same longitudinal section, or the connecting surface 16 coincides with the extended surface of the first inclined surface 15 facing the radially inner edge of the cutting surface 21. In this case, see fig. 5, the active sections 1a of the disc surfaces 11 are situated on the connection surfaces 16, the angle B between the active sections 1a of two disc surfaces 11 being equal to the angle between two connection surfaces 16 and also to the angle between two first bevels 15 for the entire connection surface 16.

For another example, referring to fig. 6-15, in other embodiments, each of the two disk surfaces 11 includes a connecting surface 16 and a first inclined surface 15, a first end of the connecting surface 16 is connected to the first inclined surface 15, a second end of the connecting surface 16 is connected to the cutting surface 21, the first inclined surface 15 is inclined with respect to the axial direction of the cutter wheel 10, and, in a longitudinal section of the cutter wheel 10, a portion between the first end and the second end of the connecting surface 16 is located radially inside a connecting line 5 between a radially outer edge of the first inclined surface 15 and a radially inner edge of the cutting surface 21, so that an avoiding portion 3 is provided between the first inclined surface 15 and the cutting surface 21. At this time, as shown in fig. 8 to 9 and fig. 11, 13 and 15, in the longitudinal section of the cutter wheel 10, the profile of the connecting surface 16 no longer coincides with the connecting line 5 between the radially outer edge of the first inclined surface 15 and the radially inner edge of the cutting surface 21, but is recessed radially inward with respect to the corresponding connecting line 5, or the connecting surface 16 no longer coincides with the extension surface of the first inclined surface 15 toward the radially inner edge of the cutting surface 21 (or the extension surface of the first inclined surface 15 toward the radially outer side), but is recessed radially inward with respect to the extension surface of the first inclined surface 15 toward the radially inner edge of the cutting surface 21. In this case, see fig. 9, 11, 13 and 15, the active sections 1a of the disc surfaces 11 are located on the connecting surface 16 or on a first transition surface 17 connected between the connecting surface 16 and the cutting surface 21, the angle B between the active sections 1a of the two disc surfaces 11 being equal to the angle between the parts of the two connecting surfaces 16 serving as the active sections 1a or to the angle between the parts of the two first transition surfaces 17 serving as the active sections 1a.

As can be seen from comparing fig. 5 and 9, compared with the case where the profile of the connection surface 16 coincides with the line 5 between the radial outer edge of the first inclined surface 15 and the radial inner edge of the cutting surface 21, when the profile of the connection surface 16 does not coincide with the line 5 between the radial outer edge of the first inclined surface 15 and the radial inner edge of the cutting surface 21 any more, but is recessed radially inward with respect to the corresponding line 5 to form the escape portion 3, the contact area between the disk surface 11 and the film 20 can be reduced, so that, when the required pressure is the same from one perspective, only a smaller pressure needs to be applied, time and labor are saved, and when the pressure is larger from another perspective, the film 20 can be cut through directly more easily, and compared with a mode in which the film 20 is not cut through directly, but the film 20 is cut off by squeezing out, the squeezing deformation of the edge of the film 20 can be effectively reduced, the risk of the film 20 being raised and warped is reduced, the cutting weight is improved, and the yield of film cutting is improved.

The relief 3 can be obtained by removing material from the first inclined surface 15 extending to the radially inner edge of the cutting surface 21, and by removing the portion of the cutter head 1 in fig. 8, 11, 13 and 15, which portion is located between the connecting line 5 (i.e., the dashed line in the figures) and the connecting surface 16. The relief part 3 formed after removing the corresponding part allows the cutting part 2 to be independently exposed. The corresponding avoiding part 3, see fig. 9, can avoid the film 20 to a certain extent in the film cutting process, reduce the contact area between the cutter head 1 and the film 20, increase the pressure applied to the film 20 by the film cutting knife wheel 10, and further realize a smoother and higher-quality film cutting process.

In the case of the escape portion 3, the connecting surface 16 may have various configurations.

For example, the connection between the connection surface 16 and the first inclined surface 15 may be various, and may be a direct connection or an indirect connection. Illustratively, referring to fig. 6-9, 10-11, and 14-15, in some embodiments, the first end of the connecting surface 16 coincides with the radially outer edge of the first beveled surface 15, in which case the first end of the connecting surface 16 and the first beveled surface 15 are not connected by other surfaces, but are directly connected to each other. As a variant, with reference to fig. 12-13, in other embodiments the first end of the connection surface 16 no longer coincides with the radially outer edge of the first ramp 15, but is located radially inside the radially outer edge of the first ramp 15, in which case the connection between the first end of the connection surface 16 and the first ramp 15 is no longer direct, but is connected by another surface (designated as the second transition surface 18 in the figures).

For another example, the connection between the connection surface 16 and the cutting surface 21 may be various, and may be a direct connection or an indirect connection. For example, referring to fig. 14-15, in some embodiments, the second end of the connecting surface 16 coincides with a radially inner edge of the cutting surface 21, and in this case, the second end of the connecting surface 16 is not connected to the cutting surface 21 by another surface, but is directly connected, and the application section 1a is located on the connecting surface 16. As a variant, with reference to fig. 6 to 9, 10 to 11 and 12 to 13, in other embodiments the second end of the connecting surface 16 no longer coincides with the radially inner edge of the cutting surface 21 but is located radially inside the radially inner edge of the cutting surface 21, in which case the second end of the connecting surface 16 is no longer directly connected to the cutting surface 21 but is connected via a further surface (designated in the figures as a first transition surface 17), the active segment 1a being located on the first transition surface 17.

For another example, the relative relationship between the connection surface 16 and the axial direction of the cutter wheel 10 may be various, and may be either parallel to the axial direction of the cutter wheel 10 (see fig. 6-9) or inclined with respect to the axial direction of the cutter wheel 10 (see fig. 10-15).

For another example, the profile type of the connecting surface 16 on the longitudinal section of the cutter wheel 10 may be various, and may be a straight line (see fig. 9-13) or a curved line (see fig. 14-15). As shown in fig. 14 and 15, when the profile of the connecting surface 16 on the longitudinal section of the film cutting wheel 10 is a curve, the profile of the connecting surface 16 may be an arc line that is concave toward the radial inner side, so as to form the avoiding portion 3 and improve the cutting effect.

In the foregoing embodiments, the two cutting surfaces 21 may be smooth surfaces, that is, there are no protrusions or grooves on the two cutting surfaces 21, and in this case, the cutting edge 22 may be referred to as a circumferential full edge without teeth, which is more advantageous for preventing the cutter wheel 10 from damaging the substrate 30.

The present application will be further described with reference to the five embodiments shown in fig. 1-15.

First, the first embodiment shown in fig. 1 to 5 will be described.

As shown in fig. 1 to 5, in this first embodiment, the cutter wheel 10 includes a cutter head 1 and a cutting portion 2.

The cutterhead 1 includes two discs 14 arranged axially side by side and opposite to each other. Both the disks 14 are solid of revolution. The centre of both is provided with a central hole 13. The center hole 13 penetrates through the two disks 14 for inserting a rotating shaft to drive the cutter wheel 10 to rotate, so that the cutter wheel 10 completes cutting of the film 20 for display panel carried on the substrate 30 (specifically, the substrate 30 made of glass in this embodiment, i.e., glass substrate) during rotation.

As can be seen from fig. 1 and 2, in this embodiment, the two disks 14 are symmetrical to each other and each include an outer end face 12 and a disk face 11, such that the slitting knife wheel 10 has two outer end faces 12 and two disk faces 11. The outer end face 12 is the end face of one end of the tray 14 remote from the other tray 14. The disc surface 11 is the outer side surface of the disc body 14, namely the rotary outer surface of the disc body 14. Also, in this embodiment, both of the trays 14 are generally frustoconical and each taper away from the other tray 14, such that the outer end surfaces 12 of both trays 14 are circular surfaces and the tray surfaces 11 of both trays 14 are tapered surfaces. The disk surface 11 is inclined with respect to the axial direction of the cutter wheel 10 (also the axial direction of the two disks 14) and is inclined toward the radially outer side of the cutter wheel 10 in a direction approaching the other disk 14. In this way, the axial two ends of the disk surface 11 far away from and close to the other disk surface 11 are different in radial position, wherein one end of the disk surface 11 far away from the other disk surface 11 along the axial direction (i.e. one end of the disk surface 11 connected with the outer end surface 12) is closer to the central axis of the film cutting cutter wheel 10 to form a radial inner edge of the disk surface 11, and the other end of the disk surface 11 close to the other disk surface 11 along the axial direction is farther from the central axis of the film cutting cutter wheel 10 to form a radial outer edge of the disk surface 11.

As shown in fig. 1-5, in this embodiment, the slope (i.e., the angle from the axial direction) is uniform throughout the disk face 11. Wherein a portion of the disk surface 11 adjacent to the cutting portion 2 is cut into the film 20 together with the cutting portion 2 in the cutting process to contact with the film 20, so that the corresponding portion constitutes the active section 1a of the disk surface 11, and a portion of the disk surface 11 connecting the active section 1a with the outer end surface 12 is not in contact with the film 20 to constitute the first inclined surface 15 of the disk surface 11. Thus, both disc surfaces 11 comprise a first bevel 15 and an active segment 1a. Both the first inclined surface 15 and the action section 1a are surfaces of revolution. The action section 1a is connected with the cutting part 2 to realize the connection of the cutter head 1 and the cutting part 2. Meanwhile, the acting section 1a is connected with the outer end face 12 through the first inclined face 15 to realize the connection of the disk face 11 with the outer end face 12. The end of the active segment 1a remote from the first inclined surface 15 forms the radial outer edge of the disk surface 11. The end of the first inclined surface 15 remote from the active segment 1a forms the radially inner edge of the disk surface 11. The slope of the action section 1a is consistent with that of the first inclined surface 15, at this time, the action section 1a is coincident with an extension surface of the first inclined surface 15 facing the cutting part 2, that is, on any longitudinal section of the film cutting knife wheel 10, a molded line of the action section 1a (also, a rotation bus of the action section 1 a) is coincident with a connecting line 5 (also, an extension line of the rotation bus of the first inclined surface 15 facing the radial outer side) between the radial outer edge of the first inclined surface 15 and the radial inner edge of the cutting surface 21, or on any longitudinal section of the film cutting knife wheel 10, the rotation bus of the action section 1a is collinear with the rotation bus of the first inclined surface 15.

As shown in fig. 1 to 3, the cutting part 2 is connected between the radially outer edges of the two disc surfaces 11 and has two cutting surfaces 21. In the direction from the axially outer side to the axially inner side (i.e., the direction from the outer end face 12 to the other disk face 11), both the cut faces 21 are gradually inclined toward the radially outer side, so that both the cut faces 21 have a radially inner edge and a radially outer edge. The radial inner edges of the two cutting surfaces 21 are respectively connected with the radial outer edges of the two action sections 1a (namely the radial outer edges of the two disc surfaces 11), and the radial outer edges of the two cutting surfaces 21 are mutually close to each other to be intersected to form the cutting edge 22 of the film cutting knife wheel 10.

In this embodiment, no protrusions or grooves are provided on both cutting surfaces 21, so that the cutting edges 22 become non-toothed circumferential full edges.

In the film cutting process, the film cutting wheel 10 of this embodiment has all of the cutting portion 2 and both of the action segments 1a cut into the film 20 and come into contact with the film 20, as shown in fig. 4 to 5.

In order to achieve a good cutting effect, in this embodiment, the angle a between the two cutting surfaces 21 of the cutting section 2 is different from the angle B between the two active sections 1a of the cutter head 1, and the angle a is greater than the angle B, the angle a is 140 ° to 155 ° (e.g., 150 °), the angle B is 65 ° to 95 ° (e.g., 90 °), and meanwhile, the axial distance T between the radially inner edges of the two cutting surfaces 21 is 15um to 20um (e.g., 19 um).

Based on the above arrangement, the film cutting knife wheel 10 is a double-angle film cutting knife wheel without the avoidance part 3, the cutting part 2 has good strength and is not easy to break, and, as shown in fig. 5, in the process of cutting the film 20, the cutting part 2 is cut into the film 20 together with the two action sections 1a and contacts with the film 20, because the angle B of the cutter head 1 is small and sharp enough, the film 20 can be smoothly cut and separated, and the angle a of the cutting part 2 is large, the substrate 30 can not be cut while the film 20 is cut and separated, the film cutting process without damaging the substrate 30 can be smoothly realized, meanwhile, based on the set angle a, angle B and axial distance T, in the film cutting process, the extrusion damage to the film edge can be reduced, the film 20 is prevented from protruding and warping, and the high-quality cutting process of the film 20 can be realized.

It can be seen that the film cutting cutter wheel 10 of this embodiment can smoothly cut the film 20 on the substrate 30 without damaging the substrate 30 and without causing excessive warping damage to the film edge, effectively solving the problem of cutting only the film without cutting the substrate, and realizing high-quality cutting of the film 20.

The four embodiments shown in fig. 6-15 will now be described. In describing the four embodiments shown in fig. 6 to 15, only the differences between the four embodiments and the other embodiments will be described with emphasis for simplifying the description.

First, the second embodiment shown in fig. 6 to 9 will be described.

In the second embodiment, the cutter wheel 10 is still a double-angle cutter wheel having both an angle a and an angle B and capable of cutting a film only without cutting a substrate, but as shown in fig. 6 to 9, the second embodiment is mainly different from the cutter wheel 10 in the first embodiment shown in fig. 1 to 5 in that the escape portion 3 is added to the disk surface 11.

Specifically, as shown in fig. 8 and 9, in this embodiment, neither of the two disk surfaces 11 includes only the first inclined surface 15 and the connection surface 16, but also includes the second inclined surface 19 and the first transition surface 17.

The first inclined surface 15 is still inclined relative to the axial direction of the cutter wheel 10, but its radially inner edge is no longer directly connected to the outer end surface 12, but is connected to the outer end surface 12 via the second inclined surface 19. The second inclined surface 19 is also inclined with respect to the axial direction of the cutter wheel 10, but with a slope different from that of the first inclined surface 15.

The connecting surface 16 is still connected to the first inclined surface 15 and the cutting surface 21, but the profile of the connecting surface 16 in longitudinal section no longer coincides with the connecting line 5 between the radially outer edge of the first inclined surface 15 and the radially inner edge of the cutting surface 21, but is located radially inside the respective connecting line 5. In particular, as can be seen from fig. 8 and 9, in this embodiment, the first end of the connecting surface 16 is still directly connected to the radially outer edge of the first inclined surface 15 (in this case, the first end of the connecting surface 16 coincides with the radially outer edge of the first inclined surface 15), but the second end of the connecting surface 16 is no longer directly connected to the radially inner edge of the cutting surface 21, but is connected to the radially inner edge of the cutting surface 21 via the first transition surface 17. Moreover, on any longitudinal section of the film cutting wheel 10, the profile of the connecting surface 16 is parallel to the axial direction of the film cutting wheel 10, and the profile of the first transition surface 17 is perpendicular to the axial direction of the film cutting wheel 10 and extends from the profile of the connecting surface 16 to the radial inner edge of the cutting surface 21. In this way, in any longitudinal section of the film cutting wheel 10, the profile of the connecting surface 16 and the profile of the first transition surface 17 are recessed radially inward with respect to the connecting line 5 between the radially outer edge of the first inclined surface 15 and the radially inner edge of the cutting surface 21, so that the corresponding portions of the connecting surface 16 and the first transition surface 17 are recessed radially inward with respect to the radially outward extending surface of the first inclined surface 15, forming the relief portion 3.

The escape portion 3 is recessed radially inward with respect to a radially outward extending surface of the first inclined surface 15, and includes a connecting surface 16 serving as a bottom wall and a first transition surface 17 serving as a side wall. The first transition surface 17 and the connection surface 16 are perpendicular to one another, so that the longitudinal section of the escape portion 3 is in the form of a right-angled triangle.

The two axial sides of the avoiding portion 3 are respectively provided with a first inclined surface 15 and a cutting surface 21, so that the disc surface 11 is provided with the avoiding portion 3 positioned between the first inclined surface 15 and the cutting surface 21. During the manufacturing process of the cutter wheel 10, the material between the connecting line 5 and the connecting surface 16 and the first transition surface 17 in fig. 8 can be removed by removing the material from the first inclined surface 15 extending to the radial inner edge of the cutting surface 21, so as to obtain the corresponding relief portion 3.

In this embodiment, the two disk surfaces 11 are provided with the relief portions 3, so that the film cutting knife wheel 10 has two relief portions 3. The two avoidance portions 3 are symmetrically arranged. Each relief 3 surrounds the entire circumference of the cutter head 1. The radial distance between the connecting surface 16 of each relief 3 and the corresponding cutting surface 21 (equal to the radial dimension of the first transition surface 17) is greater than the thickness of the membrane 20.

During the film cutting, as shown in fig. 9, a portion of the first transition surface 17 adjoining the cutting surface 21 cuts into the film 20 together with the cutting section 2, i.e. the corresponding portion of the first transition surface 17 forms the active section 1a of the disk surface 11. The two active segments 1a, together with the cutting section 2, are in contact with the film 20 during cutting.

Since in this embodiment both active segments 1a are in the radial direction of the slitting knife wheel 10, parallel to each other, the angle B between the two active segments 1a is 0 °, so that the angle B is small enough to exert a greater pressure on the film 20, thereby achieving a smoother and higher quality slitting of the film 20.

In addition, in this embodiment, since the avoiding portions 3 are respectively arranged on the two disk surfaces 11, and the material corresponding to the avoiding portions 3 is removed, the film 20 can be avoided to a certain extent in the film cutting process, the contact area between the cutter head 1 and the film 20 is reduced, and the pressure applied to the film 20 by the film cutting cutter wheel 10 is increased, so that a smoother and higher-quality film cutting process can be realized.

It can be seen that the film cutting cutter wheel 10 of the second embodiment not only can effectively solve the problem of cutting only the film without cutting the substrate, but also can further improve the smoothness of the film cutting and the quality of the film cutting because the avoiding part 3 is provided and the angle B is 0 °.

Three embodiments shown in fig. 10-15 are described next.

In the three embodiments shown in fig. 10 to 15, the cutter wheel 10 is still a dual-angle cutter wheel having both the angle a and the angle B and capable of cutting only the film without cutting the substrate, and two relief portions 3 are still provided on the cutter wheel 10, but the three embodiments and the three embodiments are different from the second embodiment shown in fig. 6 to 9 mainly in the structure of the relief portions 3, and therefore, the following description will focus on the structure of the relief portions 3 of the cutter wheel 10 in the three embodiments shown in fig. 10 to 15.

First, the structure of the avoidance portion 3 in the third embodiment shown in fig. 10 to 11 will be described.

As shown in fig. 10 and 11, in this third embodiment, the avoidance portion 3 is still located between the first inclined surface 15 and the cut surface 21, but its longitudinal section is no longer a right triangle, but an obtuse triangle.

Specifically, as shown in fig. 11, in this embodiment, the two disc surfaces 11 still each include the second inclined surface 19, the first inclined surface 15, the connecting surface 16, and the first transition surface 17, wherein the second inclined surface 19, the first inclined surface 15, the connecting surface 16, and the first transition surface 17 are connected in sequence, the axis of rotation of the connecting surface 16 is a straight line, a first end thereof coincides with the radially outer edge of the first inclined surface 15, and a second end thereof is connected with the cutting surface 21 through the first transition surface 17 extending in the radial direction, but it is different from the second embodiment shown in fig. 6 to 9 in that, in this embodiment, the axis of rotation of the connecting surface 16 is no longer parallel to the axial direction of the cutter wheel 10, but is inclined with respect to the axial direction of the cutter wheel 10, specifically, the axis of rotation of the connecting surface 16 is gradually inclined toward the radially outer side in the direction from the axially outer side to the axially inner side, so that the second end of the connecting surface 16 is located radially outer side of the first end of the connecting surface 16.

With the above arrangement, as shown in fig. 11, the longitudinal section of the escape portion 3 is not a right triangle, but an obtuse triangle. The avoidance part 3 in the shape of an obtuse triangle can also reduce the contact area between the disk surface 11 and the film 20, thereby improving the film cutting effect.

Next, the structure of the avoidance portion 3 in the fourth embodiment shown in fig. 12 to 13 will be described.

As shown in fig. 12 to 13, in the fourth embodiment, the longitudinal section of the bypass portion 3 is not triangular, but is parallelogram.

In particular, as shown in fig. 13, in this embodiment the axis of rotation of the connecting surface 16 is still a straight line which is axially inclined with respect to the cutter wheel 10, and its second end is still connected to the cutting surface 21 by means of a first transition surface 17 extending in the radial direction, but differs from the third embodiment shown in fig. 10-11 in that the first end of the connecting surface 16 no longer coincides with the radially outer edge of the first inclined surface 15, but is located radially inside the radially outer edge of the first inclined surface 15 and is connected to the radially outer edge of the first inclined surface 15 by means of a second transition surface 18 extending in the radial direction.

With the above arrangement, as shown in fig. 13, the longitudinal section of the escape portion 3 is not triangular but is parallelogram.

Next, the structure of the avoiding portion 3 in the fifth embodiment shown in fig. 14 to 15 will be described.

As shown in fig. 14 to 15, in this fifth embodiment, the first end and the second end of the connecting surface 16 coincide with the radially outer edge of the first inclined surface 15 and the radially inner edge of the cut surface 21, respectively, but in this embodiment, the axis of rotation of the connecting surface 16 is no longer a straight line, but is a curved line, and specifically, an arc line that is concave toward the radially inner side. At this time, the action section 1a is located on the connecting surface 16, which is a portion of the arc-shaped connecting surface 16 adjacent to the cutting surface 21. The angle B between the two active segments 1a is the angle between the respective portions of the arcuate joint face 16. For the purpose of "cutting only the film without cutting the substrate", in this embodiment, the maximum angle between the portions of the arc-shaped connection face 16 serving as the active segment 1a does not exceed 120 ° (e.g., 70 °, 80 °, 90 °, or 95 °)

In summary, the film cutting knife wheel 10 of the embodiments of the present application can effectively solve the problem of "only cutting the film without cutting the substrate", and realize high-quality cutting of the film 20.

Based on the film cutting knife wheel 10 of each embodiment, the application further provides a film cutting device. The slitting device comprises a substrate 30 for carrying a film 20 and a slitting knife wheel 10 according to any embodiment of the present application. The substrate 30 may be made of glass or ceramic.

The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (18)

1. A cutter wheel (10) for cutting a film (20) for a display panel carried on a substrate (30), comprising:

the cutter head (1) is provided with two disk surfaces (11), and the two disk surfaces (11) are oppositely arranged along the axial direction of the film cutting knife wheel (10); and

the cutting part (2) is connected between the radial outer edges of the two disc surfaces (11) and is provided with two cutting surfaces (21), the two cutting surfaces (21) are inclined relative to the axial direction of the film cutting knife wheel (10), and the radial outer edges of the two cutting surfaces (21) are intersected to form a cutting edge (22) of the film cutting knife wheel (10);

wherein an angle A between the two cut surfaces (21) ranges from 135 DEG to 179 DEG to prevent the dicing cutter wheel (10) from dicing the substrate (30) when dicing the film (20) carried on the substrate (30).

2. The slitting knife wheel (10) according to claim 1, characterized in that the angle a between the two cutting faces (21) is greater than or equal to 135 ° and less than 160 °; alternatively, the angle a between the two cut surfaces (21) is greater than 160 ° and less than or equal to 179 °.

3. The slitting knife wheel (10) according to claim 2, characterized in that the angle a between the two cutting faces (21) is greater than or equal to 150 ° and less than 160 °; alternatively, the angle a between the two cut surfaces (21) is greater than 160 ° and less than or equal to 170 °.

4. The slitting knife wheel (10) according to claim 1, characterized in that the two disc faces (11) each have an active section (1 a), the active sections (1 a) being the parts of the disc faces (11) intended to come into contact with the film (20), the angle B between the active sections (1 a) of the two disc faces (11) being smaller than or equal to 120 °.

5. The slitting knife wheel (10) according to claim 4, characterized in that the angle B between the active sections (1 a) of the two disc faces (11) is greater than or equal to 0 ° and less than 60 °, or the angle B between the active sections (1 a) of the two disc faces (11) is greater than 60 ° and less than 100 °.

6. The slitting knife wheel (10) according to claim 5, characterized in that the angle B between the active sections (1 a) of the two disc faces (11) is greater than or equal to 0 ° and less than or equal to 59 °; or the angle B between the active sections (1 a) of the two disk surfaces (11) is greater than or equal to 61 degrees and less than or equal to 99 degrees.

7. The slitting knife wheel (10) according to claim 1, characterized in that the axial distance T between the radially inner edges of the two cutting surfaces (21) is 2 to 100um.

8. The slitting knife wheel (10) according to claim 7, characterized in that the axial distance T between the radially inner edges of the two cutting surfaces (21) is 2 to 19um or 21 to 99um.

9. The slitting knife wheel (10) according to claim 8, characterized in that the axial distance T between the radially inner edges of the two cutting surfaces (21) is 10 to 19um.

10. The cutter wheel (10) according to any one of claims 1 to 9, wherein each of the two disc surfaces (11) comprises a connecting surface (16) and a first inclined surface (15), a first end of the connecting surface (16) is connected with the first inclined surface (15), a second end of the connecting surface (16) is connected with the cutting surface (21), and the first inclined surface (15) is inclined relative to the axial direction of the cutter wheel (10), wherein:

on the longitudinal section of the film cutting knife wheel (10), the molded line of the connecting surface (16) is overlapped with a connecting line (5) between the radial outer edge of the first inclined surface (15) and the radial inner edge of the cutting surface (21); alternatively, the first and second electrodes may be,

on the longitudinal section of the film cutting knife wheel (10), the part between the first end and the second end of the connecting surface (16) is positioned on the radial inner side of a connecting line (5) between the radial outer edge of the first inclined surface (15) and the radial inner edge of the cutting surface (21), so that an avoiding part (3) is arranged between the first inclined surface (15) and the cutting surface (21).

11. The slitting knife wheel (10) according to claim 10, characterized in that a first end of the connecting surface (16) coincides with a radially outer edge of the first bevel (15), or that a first end of the connecting surface (16) is located radially inside a radially outer edge of the first bevel (15).

12. The slitting knife wheel (10) according to claim 10, characterized in that the second end of the connecting surface (16) coincides with a radially inner edge of the cutting surface (21), or that the second end of the connecting surface (16) is located radially inside a radially inner edge of the cutting surface (21).

13. The cutter wheel (10) according to claim 10, characterized in that the attachment surface (16) is parallel to the axial direction of the cutter wheel (10) or the attachment surface (16) is inclined with respect to the axial direction of the cutter wheel (10).

14. The slitting knife wheel (10) according to claim 10, characterized in that the profile of the connecting surface (16) is straight or curved in a longitudinal section of the slitting knife wheel (10).

15. The slitting wheel (10) according to claim 14, wherein, in a longitudinal section of the slitting wheel (10), the profile of the connecting surface (16) is an arc that is concave towards a radially inner side.

16. The slitting wheel (10) according to any one of claims 1 to 9, wherein the two cutting surfaces (21) are smooth surfaces.

17. A film cutting apparatus for cutting a film (20) for a display panel, comprising a substrate (30) for carrying the film (20) and the film cutting blade wheel (10) according to any one of claims 1 to 16.

18. The apparatus according to claim 17, wherein the substrate (30) is made of glass or ceramic.

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