Abstract:
A cutting mechanism includes a first main body and a second main body. The first main body includes a first base, a plurality of first cutter holders, and a plurality of first cutters. The first cutters are mounted on the respective first cutter holders. The first cutter holders are movably engaged with the first base in a manner that the first cutters mounted thereon are adjustably movable toward and away from the first base. The first cutters are rotatable relative to the respective first cutter holders about parallel first axes, and each of the first cutters has a first blade substantially parallel to the respective first axis. The second main body has a similar configuration as the first main body.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present invention generally relates to cutting mechanisms and, particularly, to a cutting mechanism for cutting elements formed by injection molding. 
         [0003]    2. Discussion of Related Art 
         [0004]    Injection molding is a process that injecting melted modeling material into molds to mold elements having predetermined shapes. Injection molding is widely used in ceramic and polymer products as having advantages of low cost, high efficiency, and high precision. 
         [0005]    Generally, the semi-manufactured products formed by injection molding usually have different structures due to molds with different runners, for example, correctitude runners or side runners. Referring to  FIG. 5 , a semi-manufactured product  20  molded by molds having correctitude runners includes a sprue portion  200 , a plurality of runner portions  202  and a plurality of lenses  204  respectively connected to the plurality of runner portions  202 . The runner portions  202  are connected to the sprue portion  200  and form a radial-distribution around the sprue portion  200 . Each of the lenses  204  is correspondingly formed at a distal end of the runner portions  202  and on an axial direction extending from the center axis AA′ of the runner portions  202 . Referring to  FIG. 6 , a semi-manufactured product  30  molded by molds having side runners similarly includes a sprue portion  300 , a plurality of runner portions  302  and lenses  304 . The difference between the semi-manufactured product  30  and the semi-manufactured product  20  is that, each of the lenses  304  is formed on a side of a direction extending from the center axis BB′ of the runner portions  302 . Due to different structure relationship between the lenses and runner portions, different cutting blades are needed in cutting process. Accordingly, a corresponding cutting mechanism is needed in the cutting process. 
         [0006]    Therefore, what is needed is a new cutting mechanism in order to overcome the above described shortcomings. 
       SUMMARY 
       [0007]    A cutting mechanism, in accordance with a present embodiment, is provided. The cutting mechanism includes a first main body and a second main body. The first main body includes a first base, a plurality of first cutter holders and a plurality of first cutters. The first cutters are mounted on the respective first cutter holders. The first cutter holders are movably engaged with the first base in a manner that the first cutters mounted thereon are adjustably movable toward and away from the first base. The first cutters are rotatable relative to the respective first cutter holders about parallel first axes, and each of the first cutters has a first blade substantially parallel to the respective first axis. The second main body includes a second base, a plurality of second cutter holders and a plurality of second cutters. The second cutter holders are movably engaged with the second base in a manner that the second cutters mounted thereon are adjustably movable toward and away from the second base. The second cutters are rotatable relative to the respective second cutter holders about parallel second axes, and each of the second cutters has a second blade substantially parallel to the respective second axis. 
         [0008]    Detailed features of the present cutting mechanism will become more apparent from the following detailed description and claims, and the accompanying drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]    Many aspects of the present cutting mechanism can be better understood with reference to the following drawing. The components in the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present cutting mechanism. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views, wherein: 
           [0010]      FIG. 1  is a schematic view of a cutting mechanism, according to an exemplary embodiment; 
           [0011]      FIG. 2  is an exploded view of a first main body of the cutting mechanism illustrated in  FIG. 1 ; 
           [0012]      FIG. 3  is a schematic view of the cutting mechanism used to cut a semi-manufactured injection molding product with correctitude runners; 
           [0013]      FIG. 4  is a schematic view of the cutting mechanism used to cut a semi-manufactured injection molding product with side runners; 
           [0014]      FIG. 5  is a schematic view of a typical semi-manufactured injection molding product with correctitude runners; and 
           [0015]      FIG. 6  is a schematic view of a typical semi-manufactured injection molding product with side runners. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0016]    Reference will now be made to the drawing to describe the embodiments of the present cutting mechanism, in detail. 
         [0017]    Referring to  FIG. 1 , a cutting mechanism  10 , according to an exemplary embodiment, is shown. The cutting mechanism  10  includes a first main body  11  and a second main body  12 . 
         [0018]    Referring to  FIG. 2 , the first main body  11  includes a base  110 , a plurality of cutter holders  112  and a plurality of cutters  114  corresponding to the cutter holders  112 . Each cutter  114  is assembled in the corresponding cutter holder  112 . In this exemplary embodiment, the first main body  11  includes eight cutter holders  112  and eight cutters  114 . 
         [0019]    The base  110  includes a supporting portion  1102 , a plurality of receiving recesses  1104 , a plurality of positioning holes  1106  and a plurality of fasteners  1108 . The supporting portion  1102  is configured for supporting semi-manufactured products formed by injection molding. The receiving recesses  1104  are respectively defined at side portions of the base  110  and configured for receiving end portions of the cutter holders  112  therein. The fasteners  1108  penetrate through the positioning holes  1106  and thereby fix the cutter holders  112  onto the base  110  respectively. The positioning holes  1106  communicate with the corresponding receiving recesses  1104  respectively. The positioning holes  1106  can be screw thread holes and the fasteners  1108  can be screws matching with the positioning holes  1106 . The positioning holes  1106  can also be through holes with smooth inner walls, and the fasteners  1108  can be nuts and bolts matching with the nuts. 
         [0020]    The cutter holders  112  extend radially and outwardly from the first base  110 . Each of the cutter holders  112  includes a first end portion  1120  and a second end portion  1122 . The second end portion  1122  includes a receiving slot  1124  and a pivot hole  1126 . The receiving slot  1124  is configured for receiving the cutter  114 . The pivot hole  1126  communicates with the receiving slot  1124 . The pivot hole  1126  can be a screw thread hole. The pivot hole  1126  and a pivot member  1128  cooperatively pivot the cutter  114  with the second portion  1122 . As such, the cutters  114  are detachably pivoted on the second end portions  1122  of the cutter holders  112 . The pivot members  1128  can be screws engaging with the screw threads of pivot holes  1126 . The pivot holes  1126  can also be through holes with smooth inner walls, and the pivot members  1128  can be nuts and bolts matching with each other. 
         [0021]    The cutters  114  each includes a cutting portion  1140  and a pivot portion  1142 . The cutting portion  1140  and the pivot portion  1142  are approximately perpendicular to each other. The cutting portion  1140  includes a blade  1144 . The pivot portion  1142  includes a pivot slot  1146 . The pivot portion  1142  is received in the receiving slot  1124  of the cutter holder  112 . The pivot member  1128  penetrate through the pivot hole  1126  and the pivot slot  1146 , thereby pivot and fix the pivot portion  1142  at the second end portion  1122  of the cutter holder  112 . 
         [0022]    Since the first end portion  1120  of the cutter holder  112  is received in the receiving recesse  1104  of the base  110  and fixed by by engagement of the fastener  1108  in the positioning holes  1106 , the cutter holder  112  can be moved back and forth when the fastener  1108  is loosened. Thereby, the position of the cutter holder  112  can be adjusted, and thereafter be fixed again by the fastener  1108 . 
         [0023]    Similarly, the cutter  114  can also be moved back and forth when the pivot member  1128  is loosened. Additionally, since the pivot portion  1142  of the cutter  114  is pivoted with the second end portion  1122  of the cutter holder  112  cooperatively by the pivot member  1128  and the pivot hole  1126 , the cutter  114  can be rotated around the pivot member  1128  when the pivot member  1128  is loosened. Thereby, the cutter  114  can be adjusted to have a predetermined angle with the cutter holder  112 , and thereafter be fixed again by the pivot member  1128 . 
         [0024]    The second main body  12  has a configuration approximately as same as the first main body  11 . The second main body  12  includes a base  120 , a plurality of cutter holders  122 , and a plurality of cutters  124  arranged at end portions of the cutter holders  122 . The base  120  includes a plurality of receiving recesses  1204 , a plurality of positioning holes  1206  and a plurality of fasteners  1208 . The cutter holders  122  are radially arranged around the first base  110 . Each of the cutter holders  122  has an end portion received in the receiving recess  1204 .ln the present embodiment, there are eight cutters  124  detachably pivoted on the other end portions of the cutter holders  122 . The difference between the first main body  11  and the second main body  12  is that, the second main body  12  does not include a base instead, it has a receiving hole/chamber configured for receiving sprue portions  200 /or  300  (as shown in  FIGS. 3 &amp; 4 ). As such, the first and second main body  11 ,  12  can move relative to each other, thereby facilitating cutting function of the semi-manufactured products formed by injection molding. 
         [0025]    Referring to  FIG. 3 , The semi-manufactured product  20  is disposed on the supporting portion  1102  of the first main body  11 , with the runner portions  202  respectively arranged directly above the cutter holders  112 . A plurality of lenses  204  are connected respectively connected to the runner portions  202 . When the cutting mechanism  10  is used to cut the semi-manufactured product  20  having correctitude runners, the cutters  114  and  124  are respectively located at distal ends of the cutter holders  112  and  122  correspond with lenses  204 . Thereby, the semi-manufactured product  20  will be cut as the first main body  11  and the second main body  12  moving towards each other. 
         [0026]    Referring to  FIG. 4 , the semi-manufactured product  30  is disposed on the supporting portion  1102  of the first main body  11 , with the runner portions  302  respectively arranged directly above the cutter holders  112 . A plurality of lenses  304  are respectively connected to the runner portions  302 . When the cutting mechanism  10  is used to cut the semi-manufactured product  30  having side runners, the pivot members  1128  are loosened, and thereby the cutters  114  can be rotated corresponds to the location of the semi-manufactured product  30  disposed on the supporting portion  1102  of the cutter holders  112 . Thereafter, the pivot members  1128  will be fastened to fix the cutters  114  to the cutter holders  112 . Then, the cutters  124  are rotated facing the cutters  114 . The cutters  114 , 124  are respectively located on sides of the cutter holders  112 ,  122  and correspond with lenses  304  on sides of the runner portions of  302 . Thereby, the semi-manufactured product  30  will be cut as the first main body  11  and the second main body  12  moving towards each other. 
         [0027]    It is to be understood that, the number of cutter holders and cutters of the cutting mechanism  10  can also be one, two, three, four, six, or more and not limited to be eight. The cutter holders and the base can also be integrative. The distribution of the cutter holders is not limited to be radially arranged around the base, as long as it is the same with the distribution of the runner portions of the semi-manufactured products. The pivot slots of the cutters can also be replaced by through holes in the pivot portions of the cutters, the through holes can have smooth inner walls or be screw thread hole. Accordingly the pivot members can be nuts and bolts or screws matching the screw thread holes. 
         [0028]    In sum, due to the cutting mechanism  10  being equipped with cutters  114 ,  124  detachably pivoted on end portions of the first cutter holders  112  and second cutter holders  122 , thereby the cutters  114 ,  124  can be adjusted to have a predetermined orientation as same as that of the runner portions  200 ,  302 , as such the cutting mechanism  10  is applicable for cutting semi-manufactured injection molding products having runners different orientations. 
         [0029]    Finally, it is to be understood that the above-described embodiments are intended to illustrate rather than limit the invention. Variations may be made to the embodiments without departing from the spirit of the invention as claimed. The above-described embodiment illustrates the scope of the invention but do not restrict the scope of the invention.