A cutting and edging path processing method for special-shaped polarizers

Abstract

The present invention relates to the technical field of polarizer edging, and more specifically, to a tool path processing method for cutting and edging a special-shaped polarizer. A switching buffer breakpoint area is pre-established in the special-shaped arc, and the cutting and grinding paths on both sides of the special-shaped arc are split to form a left path and a right path. In the switching buffer breakpoint area, the left arc of the special-shaped arc is first cut and ground by a tool, and then the tool is pulled out through the tool exit path in the switching buffer breakpoint area, and then the tool is cut into through the tool entry path in the switching buffer breakpoint area to cut and grind the right arc of the special-shaped arc. By selecting alternating left and right paths, the tool is buffered and turned in the switching buffer breakpoint area, avoiding contact between the right side of the tool and the special-shaped polarizer during cutting and grinding on the left path and contact between the left side of the tool and the special-shaped polarizer during cutting and grinding on the right path, thereby reducing vibration and avoiding the generation of chatter marks. The processing process is more stable and more efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of polaroid edging, and more particularly to a method for processing a tool path for cutting and edging a special-shaped polaroid. Background Art

[0002] The mainstream production process of polarizers can be divided into three stages: front, middle and back, among which the front stage is the core link in polarizer production.

[0003] The front-end process includes cleaning the TAC film and stretching and laminating the PVA film. The TAC film is treated with alkaline solution, dried and rolled after cleaning to reduce the contact angle of the TAV film.

[0004] The stretching and compounding of PVA film is to immerse the PVA film in a dyeing tank, adsorb the biaxially absorbed iodine molecules, then stretch and orient it, and then compound it with the TAC film after drying to obtain a polarizing film.

[0005] The middle process is the process of coating pressure-sensitive adhesive and composite release film and other film materials, and composite protective film and peeling film on both sides;

[0006] The post-process is to cut, edge grind, clean, inspect and package the cured polarizer according to the required size.

[0007] Among them, for the edging processing of polarizers, especially the edging processing of special-shaped polarizers, since there is an inward-concave arc at the end of the polarizer, when edging it, it is necessary to adaptively select the cutting and grinding tools according to the size of the aperture of the inward-concave arc. That is, the size of the tool selected for processing special-shaped polarizers is limited by the inward-concave arc of the product. The smaller the tool diameter is, the lower the processing efficiency is due to the small contact surface, and there are more knife marks, which leads to poor product processing quality; the larger the tool diameter is, the more the contact surface between the tool and the product is increased, and the efficiency is improved, but the surface of the special-shaped polarizer is subjected to unstable force during processing, resulting in tool vibration, resulting in tool vibration marks on the cutting and grinding surface, which may seriously or even directly lead to product defects or even scrap. Summary of the Invention

[0008] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for processing the tool path of cutting and edging of special-shaped polarizers, which has the advantages of avoiding the generation of chatter marks, more stable force during the processing process, and higher efficiency.

[0009] The above technical objectives of the present invention are achieved through the following technical solutions: a method for processing a cutting and edging path of a special-shaped polarizer, the method comprising the following steps:

[0010] S1: establishing an image switching buffer breakpoint area within the irregular arc on the irregular polarizer, and dividing the left and right sides of the irregular arc into two sections: a left path and a right path;

[0011] S2: Selecting a cutting tool that fits the semi-arc edge of the special-shaped arc and has a diameter smaller than the diameter of the special-shaped arc;

[0012] S3: setting a left path and a right path for tool cutting and polishing at the edge of the shaped polarizer on both sides of the central symmetry axis of the shaped arc, respectively, wherein the left path and the right path are set as a tool exit path and a tool feed path along the direction of the central symmetry axis of the shaped arc, and the tool is buffered by alternating the tool exit path and the tool feed path;

[0013] S4: According to the directions of the exit and entry paths of the left and right paths, the tool is used to cut and grind along the edge of the shaped polarizer to the left and right sides until the left and right cutting and grinding paths form a closed loop and the cutting and grinding is completed.

[0014] Preferably, when edge grinding the special-shaped polarizer, multiple special-shaped polarizers are stacked and processed, cut and ground simultaneously.

[0015] Preferably, the left starting point of the tool cutting and polishing is selected at any point on the side of the shaped polarizer along the left path, and the tool is approached to the shaped arc along the edge of the shaped polarizer based on the left starting point, and the left end point of the tool cutting and polishing is selected at any point on the tool exit path.

[0016] Preferably, any point along the feed path is selected as the right starting point of tool cutting and polishing, and the tool is moved away from the shaped arc along the edge of the shaped polarizer according to the right starting point until the tool cutting and polishing coincides with the left path.

[0017] Preferably, the larger the diameter of the tool, the longer the blade of the tool is set, and the higher the thickness of the stack of shaped polarizers that can be cut and polished.

[0018] Preferably, the special-shaped arc includes a V-shaped arc or an arc-shaped bangs.

[0019] In summary, the present invention has the beneficial effects of:

[0020] 1. Establish a switching buffer breakpoint area in the special-shaped arc in advance, split the cutting and grinding paths on both sides of the special-shaped arc into a left path and a right path. In the switching buffer breakpoint area, first use the tool to cut and grind the left arc of the special-shaped arc, then extract it through the tool exit path in the switching buffer breakpoint area, and then cut in through the tool feed path in the switching buffer breakpoint area to cut and grind the right arc of the special-shaped arc. By selecting the left and right alternate paths, the tool is buffered and turned in the switching buffer breakpoint area, avoiding the right side of the tool contacting the special-shaped polarizer when cutting and grinding on the left path, and the left side of the tool contacting the special-shaped polarizer when cutting and grinding on the right path, thereby reducing vibration and avoiding chatter marks. The processing process is more stable and efficient.

[0021] 2. Due to the establishment of the image-changing buffer breakpoint area, the force area of ​​the tool when grinding the edge in the special-shaped arc is controlled. Therefore, a tool with a larger diameter can be selected to adaptively match the arc in the special-shaped arc, thereby increasing the rigidity of the tool and extending the service life of the tool. Based on this, the number of stacked special-shaped polarizers can be increased simultaneously, greatly improving the processing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a tool cutting and grinding path according to an embodiment of the present invention;

[0023] Figure 2 is a partial schematic diagram of the left path of an embodiment of the present invention;

[0024] Figure 3 is a partial schematic diagram of the right path of an embodiment of the present invention;

[0025] Figure 4 This is a diagram showing the cutting and grinding paths of large and small diameter tools according to an embodiment of the present invention;

[0026] Figure 5 Schematic diagram of stacking of cutting and polishing of special-shaped polarizers using a small-diameter tool according to an embodiment of the present invention;

[0027] Figure 6 Schematic diagram of stacking of cutting and polishing special-shaped polarizers using a large-diameter tool according to an embodiment of the present invention.

[0028] Figure numerals: 1. Special-shaped polarizer; 11. Special-shaped arc; 12. Left path; 13. Right path; 14. Central symmetry axis of the special-shaped arc; 15. Tool exit path; 16. Tool entry path; 2. Buffer point; 3. Small-diameter tool; 31. Large-diameter tool. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] It should be noted that when a component is referred to as being “fixed to” or “disposed on” another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being “connected to” another component, it can be directly or indirectly connected to the other component.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0033] A method for processing an edge grinding tool path of a special-shaped polarizer 1, see Figure 1 , the method comprises the following steps:

[0034] S1: establishing an image switching buffer breakpoint area within the irregular arc 11 on the irregular polarizer 1, and dividing the left and right sides of the irregular arc 11 into two sections: a left path 12 and a right path 13;

[0035] S2: Select a cutting tool that fits the semi-arc edge of the special-shaped arc 11 and has a diameter smaller than the diameter of the special-shaped arc 11;

[0036] S3: setting a left path 12 and a right path 13 for tool cutting and polishing along the edge of the shaped polarizer 1 on both sides of the central symmetry axis of the shaped arc 11, respectively. The left path 12 and the right path 13 are set with a tool exit path 15 and a tool feed path 16 along the central symmetry axis of the shaped arc 11. The tool is buffered by alternating the tool exit path 15 and the tool feed path 16;

[0037] S4: According to the directions of the exit path 15 and the feed path 16 of the left path 12 and the right path 13, the tool is used to cut and grind along the edge of the shaped polarizer 1 to the left and right sides until the left and right cutting and grinding paths form a closed loop and the cutting and grinding is ended.

[0038] During implementation of this embodiment, a switching buffer breakpoint area is pre-established within the irregular circular arc 11, and the cutting and polishing paths on both sides of the irregular circular arc 11 are split to form a left path 12 and a right path 13. Within the switching buffer breakpoint area, the tool is first used to cut and polish the left arc of the irregular circular arc 11, and then the tool is withdrawn via the tool exit path 15 within the switching buffer breakpoint area. Then, the tool is inserted via the tool entry path 16 within the switching buffer breakpoint area to cut and polish the right arc of the irregular circular arc 11. By selecting alternate left and right paths, the tool is buffered and turned within the switching buffer breakpoint area, thereby avoiding contact between the right side of the tool and the irregular polarizer 1 during cutting and polishing on the left path 12, and contact between the left side of the tool and the irregular polarizer 1 during cutting and polishing on the right path 13. This reduces vibration, avoids chatter marks, and ensures a more stable processing force and higher efficiency.

[0039] Due to the establishment of the image switching buffer breakpoint area, the force area of ​​the tool when grinding the edge in the special-shaped arc 11 is controlled. Therefore, a tool with a larger diameter can be selected to adaptively match the arc in the special-shaped arc 11, thereby increasing the rigidity of the tool and extending the service life of the tool. Based on this, the number of stacking of special-shaped polarizers 1 is simultaneously increased, which greatly improves the processing capacity.

[0040] See also Figure 4 For tools of different diameters, the smaller the diameter, the longer the path the tool travels along the edge of the irregularly shaped polarizer 1. In this embodiment, the diameter of the irregularly shaped arc 11 is D6.3mm, the diameter of the large-diameter tool 31 is D6mm, and the diameter of the small-diameter tool 3 is D4.5mm. The length of the edge grinding path was verified using tools of different diameters.

[0041] Specifically, when edge grinding the special-shaped polarizer 1, multiple special-shaped polarizers 1 are stacked and processed, cut and ground simultaneously.

[0042] The thickness of the stacked special-shaped polarizers 1 is positively correlated with the diameter of the tool.

[0043] Tool blade length (L): L≤5*D, where L is the tool blade length, the coefficient 5 is a constant, and the tool diameter is D. The larger the value of D, the larger the value of L.

[0044] Assume that the stacking thickness of the single-processed special-shaped polarizer 1 is H, and it is known that H≤L.

[0045] When the value of L is larger, the value of H is larger, that is, the stacked thickness of the special-shaped polarizer 1 is higher.

[0046] See Figure 5 , for the multiple special-shaped polarizers 1 cut and polished by the small-diameter tool 3, due to the limitation of the tool edge length, the maximum stacked thickness of the multiple special-shaped polarizers 1 is limited to 22.5 mm.

[0047] See Figure 6 , for the multiple special-shaped polarizers 1 cut and polished by the large-diameter tool 31, under the limitation of the tool edge length, the maximum stacked thickness of the multiple special-shaped polarizers 1 can be limited to 30.00 mm.

[0048] It can be seen that the increase in the tool diameter can promote the increase in the number of stacked special-shaped polarizers 1 cut and polished at one time, thereby greatly improving the processing efficiency.

[0049] See Figure 2 , specifically, select any point on the side of the special-shaped polarizer 1 along the left path 12 as the left starting point for tool cutting and polishing, and move along the edge of the special-shaped polarizer 1 towards the special-shaped arc 11 based on the left starting point, and end at any point on the tool exit path 15 as the left end point for tool cutting and polishing.

[0050] Assume that the left starting point is A1, the left end point is A2, and the buffer point 2 in the image conversion buffer break point area is C. Based on this, the left path 12 is A1 - C - A2.

[0051] See Figure 3 , specifically, select any point on the feed path 16 as the right starting point for tool cutting and polishing, and move along the edge of the special-shaped polarizer 1 away from the special-shaped arc 11 based on the right starting point until the tool cutting and polishing coincides with the left path 12.

[0052] Assume that the right starting point is B1, the right end point is B2, and the buffer point 2 in the image conversion buffer break point area is C. Based on this, the right path 13 is B1 - C - B2. Through the coincidence between A1 and B2, a closed loop of the left path 12 and the right path 13 is achieved.

[0053] The cutting and polishing path of the traditional special-shaped polarizer 1 is to set a standard "匚"-shaped cutting and polishing path. By flipping the special-shaped polarizer 1, two left and right "匚"-shaped cutting and polishing paths are established to form a closed loop for the edge grinding of the special-shaped polarizer 1. In this form, the setting of the cutting and polishing path is relatively simple, but due to more path coincidence parts, the cutting and polishing efficiency is reduced.

[0054] In this embodiment, through the division of the left path 12 and the right path 13, and through the coincidence between the left starting point and the right end point, the excessive coincidence between the left path 12 and the right path 13 is avoided, and repeated cutting and polishing is avoided, thereby improving the efficiency.

[0055] Specifically, the special-shaped arc 11 includes a V-shaped arc or an arc-shaped bangs. The special-shaped arc 11 in this embodiment is a V-shaped arc, wherein the arc-shaped bangs refers to the Apple bangs design corresponding to Apple mobile phones.

[0056] The tool movement principle for machining the special-shaped arc 11 of the special-shaped polarizer 1 in this embodiment is as follows:

[0057] When a CNC system processes curved segments, multiple axes simultaneously work together to automatically create acceleration and deceleration effects. When a V-shaped curvature transition occurs during tool path motion, the X and Y axes simultaneously work together, starting from one quadrant and decelerating to the highest point before accelerating to the next quadrant. This creates fluctuations in acceleration and deceleration, reducing tool cutting stability and leading to abnormalities such as chattering, overcutting, and undercutting.

[0058] The method of the present invention controls the tool motion trajectory at the highest point of the V-shaped curvature change, and adds an auxiliary motion trajectory, that is, the tool exit path, to directly withdraw the tool from cutting and grinding, thereby avoiding abnormalities caused by the change, and then cuts in from the auxiliary motion trajectory, that is, inserts the tool along the tool feed path to complete the other half of the processing, thereby reducing vibration, making the tool cutting path transition smooth and buffered; thereby completely avoiding undesirable phenomena such as tool vibration, overcutting, and undercutting.

[0059] The above embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the embodiments as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A method for processing a cutting path for cutting and edging a special-shaped polarizer, characterized by: The method comprises the following steps: S1: establishing an image switching buffer breakpoint area within the irregular arc on the irregular polarizer, and dividing the left and right sides of the irregular arc into two sections: a left path and a right path; S2: Selecting a cutting tool that fits the semi-arc edge of the special-shaped arc and has a diameter smaller than the diameter of the special-shaped arc; S3: setting a left path and a right path for tool cutting and polishing at the edge of the shaped polarizer along both sides of the central symmetry axis of the shaped arc, respectively. The left path and the right path are set as a tool exit path and a tool feed path along the central symmetry axis of the shaped arc, and the tool is buffered by alternating the tool exit path and the tool feed path; S4: According to the directions of the exit and infeed paths of the left and right paths, the tool is used to cut and polish the edge of the special-shaped polarizer to the left and right sides until the left and right cutting and polishing paths form a closed loop, thereby completing the cutting and polishing. A left starting point for tool cutting and polishing is selected at any point on the side of the shaped polarizer along the left path, and the tool moves closer to the shaped arc along the edge of the shaped polarizer based on the left starting point, and ends at a left end point of tool cutting and polishing selected at any point on the tool exit path; any point is selected along the tool feed path as the right starting point for tool cutting and polishing, and the tool moves away from the shaped arc along the edge of the shaped polarizer based on the right starting point until the tool cutting and polishing coincide with the left path.

2. The method for processing a cutting and edging path for a special-shaped polarizer according to claim 1, wherein: When grinding the edges of special-shaped polarizers, multiple special-shaped polarizers are stacked and processed, cut and polished simultaneously.

3. The method for machining a cutting and edging path for a special-shaped polarizer according to claim 2, wherein: The larger the tool diameter, the longer the tool blade is set, and the thicker the stack of shaped polarizers that can be cut and polished is.

4. The method for machining a cutting and edging path for a special-shaped polarizer according to claim 2, wherein: The special-shaped arc includes a V-shaped arc or an arc-shaped bangs.

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