Patent Publication Number: US-2022227019-A1

Title: Cutter and adhesive cutting device

Description:
FIELD 
     The present disclosure generally relates to a cutter, and more particularly to an adhesive cutting device and a cutter of the adhesive cutting device. 
     BACKGROUND 
     In a pasting process of a conductive adhesive, two parallel adhesives are cut on a substrate with a single-blade cutter and then attached to a workpiece. However, such a pasting process may have a high cost and a low yield. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Implementations of the present disclosure will now be described, by way of embodiments, with reference to the attached figures. 
         FIG. 1  is a schematic diagram of a structure of a cutter according to an embodiment of the present disclosure. 
         FIG. 2  is a schematic diagram of a structure of an adhesive cutting device according to an embodiment of the present disclosure. 
         FIG. 3  is a bottom view of a pressing head shown in  FIG. 2 . 
         FIG. 4  is a schematic diagram of a structure of a workpiece and an adhesive. 
     
    
    
     DETAILED DESCRIPTION 
     It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. Additionally, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features. The description is not to be considered as limiting the scope of the embodiments described herein. 
     Several definitions that apply throughout this disclosure will now be presented. 
     The term “substantially” is defined to be essentially conforming to the particular dimension, shape, or another word that “substantially” modifies, such that the component need not be exact. For example, “substantially cylindrical” means that the object resembles a cylinder, but can have one or more deviations from a true cylinder. The term “comprising” means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series, and the like. 
       FIG. 1  shows an embodiment of a cutter  100  for cutting an adhesive. The cutter includes a base  100   a , a first blade  10 , a second blade  20 , and a third blade  30 . The first blade  10 , the second blade  20 , and the third blade  30  are arranged on the base  100   a . The first blade  10  is substantially perpendicular to the base  100   a  along the cutting edge direction. The second blade  20  is substantially parallel to the first blade  10  along a length direction and forms a first included angle a with the base  100   a  along a width direction. 
     The third blade  30  is located on the side of the second blade  20  away from the first blade  10 . The second blade  20  is located between the first blade  10  and the third blade  30 . The third blade  30  is substantially parallel to the first blade  10  along the length direction and forms a second included angle b with the base  100   a  along the width direction. The second blade  20  and the third blade  30  are not parallel with each other in the width direction. Cutting edges of the first blade  10 , the second blade  20 , and the third blade  30  are in a same plane, so as to cut an adhesive at the same time. In one embodiment, the adhesive is an anisotropic conductive film adhesive, which is attached to a camera module of a mobile phone product after cutting. 
     In one embodiment, the first included angle a and the second included angle b are both 80 degrees, and a distance between the second blade  20  and the third blade  30  gradually increases in a direction away from the base  100   a . In other embodiments, an angle range of the first included angle a and the second included angle b is greater than or equal to 60 degrees and less than or equal to 85 degrees, and the distance between the second blade  20  and the third blade  30  may gradually decrease in the direction away from the base  100   a.    
     In use, a section of adhesive is formed between the first blade  10  and the second blade  20 , a section of adhesive is formed between the second blade  20  and the third blade  30 , and a section of adhesive is formed between the third blade  30  and the first blade  10  of a previous cutting. In other words, the cutter  100  can cut a continuous piece of adhesive into three sections. The first included angle a of the second blade  20  and the second angle b of the third blade  30  can prevent the adhesive from being excessively deformed due to extrusion during cutting, thereby improving yield. 
       FIG. 2  shows an embodiment of an adhesive cutting device  200  for cutting an adhesive  400  and attaching the cut adhesive  400  to a workpiece  300 . The adhesive cutting device  200  includes a pressing head  210  and the above-described cutter  100 . One side of the adhesive  400  is adhered to a substrate  410 . The cutter  100  only cuts the adhesive  400  on the substrate  410  and does not cut the substrate  410 . The pressing head  210  is used to press down the substrate  410  to stick the cut adhesive  400  onto the workpiece  300 . 
     The pressing head  210  includes a connecting portion  210   a  and two pressing portions  210   b . The two pressing portions  210   b  are located at two ends of the connecting portion  210   a , respectively. The connecting portion  210   a  is used to drive the pressing portions  210   b  to press the substrate  410  to press the adhesive  400  onto the workpiece  300 . Positions corresponding to the two pressing portions  210   b  are between cutting positions of the first blade  10  and the second blade  20 , and between cutting positions of the third blade  30  and the first blade  10  of the previous cutting. When the adhesive  400  is attached to the workpiece  300  at the positions of the two pressing portions  210   b , a middle portion of the adhesive  400  will be taken away by the substrate  410  when the substrate  410  is torn off, as shown in  FIG. 4 . 
     Referring to  FIG. 3 , the two pressing portions  210   b  are substantially rectangular and arranged in parallel. A gap  210   c  is arranged between the two pressing portions  210   b , and a width of the gap  210   c  is greater than or equal to 4 mm and less than or equal to 5 mm. The gap  210   c  is for preventing the middle portion of the adhesive  400  from sticking to the workpiece  300 . 
     In one embodiment, a buffer material  500  is arranged on a surface of the pressing portions  210   b . The buffer material  500  is a flexible material for flexibly contacting the substrate  410 . 
     In one embodiment, the workpiece  300  includes a main body  310  and two protrusions  320 . The two protrusions  320  are arranged on two ends of the main body  310 , respectively. Positions of the two pressing portions  210   b  correspond to positions of the two protrusions  320 . The pressing portions  210   b  press the adhesive  400  onto a surface of the protrusions  320 . The protrusions  320  are for preventing the middle portion of the adhesive  400  from contacting the workpiece  300 . 
     In summary, the adhesive  400  is first cut on the substrate  410  into three pieces by the cutter  100 . Then, the cut adhesives  400  are placed on the workpiece  300 , and the pressing head  210  presses the substrate  410  to press the adhesive  400  onto the protrusions  320  of the workpiece  300 . Finally, the substrate  410  is ripped off from the adhesive  400 , and the middle portion of the adhesive  400  is taken away from the workpiece  300 . 
     The cutter  100  can simultaneously cut the adhesive  400  into three pieces through the first cutter  10 , the second cutter  20 , and the third cutter  30 , thereby achieving the purpose of reducing cutting costs. After the adhesive  400  is cut by the cutter  100 , the adhesive  400  is pressed onto the workpiece  300  by the pressure head  210 , and the middle portion of the adhesive  400  is removed, which improves efficiency and yield and reduces costs. 
     The embodiments shown and described above are only examples. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, including in matters of shape, size and arrangement of the parts within the principles of the present disclosure up to, and including, the full extent established by the broad general meaning of the terms used in the claims.