Abstract:
The heat sink manufacturing apparatus comprises: a working machine, a set of linkage equipment and a feeding mechanism; wherein a working zone of the working machine has therein the feeding mechanism, a power arm of the working machine drives an elastically extending and contracting knife set; a material block fixed on the feeding mechanism which progresses for a predetermined distance is cut in a bevel way by the knife set; the process of cutting is repeated till the feeding mechanism reaches its end to contact a contact switch to stop the operation of the machine.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The present invention is related to a heat sink manufacturing apparatus, and especially related to a manufacturing apparatus in which a working machine, a set of linkage equipment and a feeding mechanism cooperate to form the manufacturing apparatus that can increase production rate and lower cost of production; the manufacturing apparatus suits particularly manufacturing of a heat sink or the like.  
           [0003]    2. Description of the Prior Art  
           [0004]    By virtue that science and technology as well as industries have been highly developed; the rate of inventing of various electric appliances is raised relatively. To these electric appliances, the problem of heat sinking is quite important in maintaining normal operation of the electric appliances; especially by fast progressing of modern computers, working speed of CPU&#39;s gets faster and faster from day to day, and high temperature results accordingly, it needs heat sinks of high efficiency with fans for scattering heat, otherwise, the CPU&#39;s will be burned.  
           [0005]    Speak about a conventional heat sink often seen, it is made by extruding of aluminum; the heat sink made by extruding of aluminum has fins with quite large thickness, and the space between every two fins is unable to be reduced. Thereby, number of fins that can be formed in every unit area is limited, and heat sinking area can not be effectively increased. A single fin has limited heat sinking effect; the only way to increase the heat sinking area is to make the heat sink relatively large, but this does not meet the requirement of the above mentioned CPU&#39;s of high speeds.  
           [0006]    To eliminate the problem that the volume of a heat sink is large but the heat sinking effect of the heat sink is not good, a new fashioned heat sink has been made by using an automation CNC working machine. Such a working machine has a knife set fixed and has the fed material pushed forwards in sequence; the material block is cut in a bevel way to get fins, the thickness of cutting each time is very small, this can reduce the space between every two fins to largely reduce the volume of the heat sink; however, the working machine is expensive at a price of about 4,000 thousands New Taiwan Dollar, while its speed of manufacturing is slow, this is the primary defect thereof.  
           [0007]    And in another conventional heat sink often seen, it comprises a lot of heat sinking fins and a positioning rod extending in the hollow areas on the surfaces of the fins, a deformed portion on the positioning rod tightly clamps the two sides of the hollow area of each heat sinking fin, so that the positioning rod can be easily and integrally connected with the heat sinking fins separated from one another, and the heat sinking fins are concentrated to get extreme high density.  
           [0008]    Although the structure of the above stated heat sink can reduce the space between every two fins, it needs another process for extending and connecting of the fins and the positioning rod to form the heat sink for use, the heat sink can not be integrally formed and thereby is still undesired.  
           [0009]    Therefore, the inventor of the present invention worked for improving heat sinks to get rid of the defects resided in the conventional structures, and thereby provided a heat sink manufacturing apparatus using a conventional working machine in cooperating with a set of linkage equipment and a feeding mechanism to integrally form the heat sink from a material block; the heat sink manufacturing apparatus for acquiring the heat sink structure can be obtained without additional process of combination, the apparatus can be conveniently used by customers, and this is the motive of the present invention.  
         SUMMARY OF THE INVENTION  
         [0010]    The primary object of the present invention is to provide a heat sink manufacturing apparatus in which a working machine, a set of linkage equipment and a feeding mechanism cooperate to integrally form a heat sink.  
           [0011]    The secondary object of the present invention is to provide a heat sink manufacturing apparatus that can increase production rate and lower cost of production.  
           [0012]    To get the object, the present invention mainly is comprised of: a working machine, a set of linkage equipment and a feeding mechanism, wherein the working machine is provided in a working zone thereon with the feeding mechanism and a power arm to drive an elastically extending and contracting knife set progressing in a bevel way. The power arm is provided laterally thereof with a fin fixing rod; the linkage equipment includes a cam on a follower axle of the working machine to move a linked-up rod which is provided on the bottom thereof with a linked-up gear, a rod connected with the linked-up gear connects and rotates a reducing gear; the feeding mechanism is provided thereon with a clamping seat, the clamping seat is provided on the end thereof with a contact switch and is moved by an internal bolt for forwarding and retracting. The bolt is provided on one end thereof with a transmission gear engaged with the reducing gear of the linkage equipment, and is provided on the other end thereof with a motor. By driving the elastically extending and contracting knife set by the power arm, the material block clamped on the feeding mechanism can be cut in a bevel way, and the power arm synchronically links up the feeding mechanism through the linkage equipment to make the material on the feeding mechanism advance for a same distance each time. The process of cutting in a bevel way of the knife set is repeatedly executed until the feeding mechanism reaches an end and touches a switch to stop motion.  
           [0013]    The present invention will be apparent in its novelty and features after reading the detailed description of the preferred embodiments thereof in reference to the accompanying drawings. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0014]    [0014]FIG. 1 is a plane view of an embodiment of the present invention;  
         [0015]    [0015]FIG. 2 is a perspective view of part of the embodiment of the present invention;  
         [0016]    FIGS.  3 - 4  are schematic views showing the actions of parts of the embodiment of the present invention;  
         [0017]    [0017]FIG. 4 a  is an enlarged schematic view showing operation of the knife set of the present invention;  
         [0018]    [0018]FIG. 5 is a plane schematic view showing completion of operation of the embodiment of the present invention;  
         [0019]    [0019]FIG. 6 is a perspective view of an article made by the present invention;  
         [0020]    [0020]FIG. 7 is a perspective view of another embodiment of the present invention;  
         [0021]    [0021]FIG. 8 is a schematic view showing the action of part of the embodiment of FIG. 7. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0022]    Referring to FIG. 1, taking a working machine which is a punch press  10  as an example, it is in cooperation with a set of linkage equipment  20  and a feeding mechanism  30 , wherein a follower axle  18  at the lateral side of the punch press  10  is provided with a cam  181 , and is provided on the bottom thereof with a reciprocating punch  11 . The punch  11  is bevel in shape, and a knife set  13  progressing in a bevel way is provided under the bevel punch  11  on which a spring  14  is provided. The end of the knife set  13  progressing in a bevel way is provided with a knife  15  of which the bottom on the front end thereof has a recess  16 . The recess  16  forms a pushing edge  17  at the front edge thereof; the bevel punch  11  is provided at a suitable position on the periphery thereof with an “L” shaped fin fixing rod  12 .  
         [0023]    Referring to FIG. 2, the linkage equipment  20  is provided with a linked-up rod  21  which is provided on the bottom thereof with a linked-up gear rack  22 , the linked-up gear rack  22  is engaged with a linked-up gear  23  which is extended through a rod  231 , the rod  231  is connected on the other end thereof with a reducing gear  24 . The reducing gear  24  is engaged with a transmission gear  32 . The feeding mechanism is generally in a rectangular shape, and is provided on the top thereof with a clamping seat  31 ; the clamping seat  31  is provided for firmly clamping a material  40 , and is provided on the end thereof with a contact switch  36 . The clamping seat  31  is engaged with a bolt  33  internally thereof, and can be moved reciprocally on the bolt  33 ; one end of the bolt  33  is connected with the transmission gear  32 , a dial  26  and a positioning rod  25 , and the other end thereof is connected with a motor  34  which has a retroverting switch  35  (Referring FIG. 5).  
         [0024]    As shown in FIGS.  3 - 5 , the a material block  40  is placed on the clamping seat  31  of the feeding mechanism  30  in the first place, and is clamped firm; then the retroverting switch  35  is activated, and the motor  34  activates the clamping seat  31  (together with the material  40 ) to make it slide to the starting position (namely a position under the knife  15 ). At this time, the punch press  10  is activated to make the punch  11  move to and fro; when the punch  11  rushes down onto the knife set  13  to push forwards the latter, the knife  15  on the front end of the knife set  13  thereby cuts the material  40  in a bevel way; when the punch  11  restores to its raised position and the force of down pressing disappears, the knife  15  restores to its original position by the spring  14  on the knife set  13 . The cam  181  rotates to move the linked-up rod  21  of the linkage equipment  20  and to move the linked-up gear  23  in engagement with the linked-up gear rack  22 . The linked-up gear  23  rotates the reducing gear  24  through the rod  231  when it is rotated, and also rotates the transmission gear  32  of the feeding mechanism  30 . The transmission gear  32  moves the bolt  33  when it is rotated, and the bolt  33  moves forwards the clamping seat  31  to a fixed position to be fixed by the positioning rod  25 . When the punch  11  of the punch press  10  once more rushes down, the knife  15  once more cuts the material  40  in a bevel way, while the fin  43  cut last time is pushed to fold up by the pushing edge  17  of the knife  15  toward the fin fixing rod  12 . The process is repeatedly progressed till the entire material block  40  is completely cut into fins  43  by the knife  15 . The fins  43  are abutted and positioned by the fin fixing rod  12  and the pushing edge  17  on the knife  15 . And the contact switch  36  provided on the end of the clamping seat  31  is contacted to stop the operation of the machine.  
         [0025]    In operation, when the cam  181  rotates for 0-90°, the linkage equipment  20  moves forwards the clamping seat  31  of the feeding mechanism  30  to make it be fixed by the positioning rod  25 , the punch  11  is lowered. When the cam  181  rotates for 90-180°, the linked-up rod  20  is not moved, the punch  11  contacts the knife set  13  progressing in a bevel way, and the knife  15  of the knife set  13  starts to cut in a bevel way. When the cam  181  rotates for 180-270°, the linked-up rod  20  is not moved, the punch  11  is retracted, and the knife  15  of the knife set  13  is retracted too. When the cam  181  rotates for 270-360°, the positioning rod  25  is removed from the dial  26 , the linked-up rod  21  is moved back to its original position, so that the punch  11  totally gets rid of the knife set  13  progressing in a bevel way and restores to its original position. In this way, the entire process including material feeding, cutting, abutting to erect fins and knife retracting can be completed within a stroke. The material block  40  is provided on the lateral sides thereof with flanges  41  for convenience of clamping of the clamping seat  31  and is provided centrally thereof with a separating groove  42 . The material block  40  in completion of cutting and folding will be in the state as shown in FIG. 6, a lot of fins  43  capable of increasing the surface area thereof can be formed thereon. Therefore, after completion of cutting and folding, the material block  40  as a whole forms a heat sink, and can be completely cut and folded in pursuance of the volume and length required, an integral heat sink with multiple and concentrated thin fins having increased surface area for heat sinking can thus be completed.  
         [0026]    Referring FIGS. 7, 8 showing another embodiment of the present invention, wherein the bolt  33  of the feeding mechanism  30  is substituted by a gear rack  90 , an air pressure cylinder “A”  37 , an air pressure cylinder “B”  38  and an air pressure cylinder “C”  39  are provided to make movement of the clamping seat  31  on the gear rack  90 ; and wherein the cam  181  is slightly modified to contact a microswitch  19  when in rotation to thereby control the air pressure cylinder “A”  37  and the air pressure cylinder “B”  38 . The air pressure cylinder “B”  38  is allocated in a longitudinal direction relative to the gear rack  90 , the rear portion of its cylinder body is pivotally connected to the working machine, while the front portion of the cylinder body is provided with the linked-up rod  21 . The upper end of the linked-up rod  21  is similarly moved by the cam  181 , and the axle of the air pressure cylinder “B”  38  is provided on the front end thereof with a toothed pushing block  381  able to be engaged for pushing a predetermined distance each time. The air pressure cylinder “A”  37  and the gear rack  90  are allocated in a vertical direction, the front end of the cylinder axle of the air pressure cylinder “A”  37  is connected with a toothed fixing block  371 .  
         [0027]    When the cam  181  rotates for 0-270° and contacts the microswitch  19 , the microswitch  19  is electrically turned on; at this time, the air pressure cylinder “A”  37  and the air pressure cylinder “B”  38  act simultaneously to move forwards and make positioning of the clamping seat  31 . When the cam  181  rotates for 270-360°, the microswitch  19  is electrically turned off; the linked-up rod  21  pushes away the air pressure cylinder “B”  38 , the air pressure cylinder “A”  37  and the air pressure cylinder “B”  38  are retracted to their original positions, and the material block  40  is cut in a bevel way to obtain a fin  43  by the knife  15 . The process is repeatedly progressed till the contact switch  36  is contacted to stop the operation of the machine. When a new material block  40  is placed on the clamping seat  31  which gets back to its proper position by the action of the air pressure cylinder “C”  39 .  
         [0028]    The heat sink manufacturing apparatus of the present invention is advantageous in that:  
         [0029]    1. A heat sink with an increased surface area for heat sinking can be made just by using a punch press in cooperating with a knife set progressing in a bevel way and a feeding mechanism, each set of equipment for production only costs 800 thousands New Taiwan Dollar; this saves the large cost for purchasing producing machines of high unit price, thereby, an effect of largely lowering the cost of production can be obtained.  
         [0030]    2. The heat sink manufacturing apparatus of the present invention can reduce the space between every two fins, and can increase the area of the heat sink within a predetermined distance; thereby, the defect of inability of reducing the volume of a heat sink produced by extruding of aluminum can be effectively eliminated.  
         [0031]    3. Using a conventional punch press of lower cost in cooperating with a knife set progressing in a bevel way and a feeding mechanism can complete the sequential actions of material feeding, rushing down, cutting in a bevel way, abutting and knife retracting within a single stroke, it is about 1.2 folds faster than the production with an expensive CNC, thereby can increase the speed of production of the heat sink in a more economic and effective way.  
         [0032]    In conclusion, the heat sink manufacturing apparatus of the present invention can make an integral heat sink easily by using a working machine in cooperating with a knife set progressing in a bevel way and a feeding mechanism, the entire style of space of the heat sink is brand-new in comparison with conventional heat sink manufacturing apparatuses, and has evident improvement in effect.  
         [0033]    The above stated is only a preferred embodiment of the present invention, and not for giving any limitation to the scope of the present invention. It will be apparent to those skilled in this art that various modifications or changes can be made to the elements of the present invention without departing from the spirit, scope and characteristic of this invention and shall fall within the scope of the appended claims and are intended to form part of this invention.