Patent Document

FIELD OF THE INVENTION  
       [0001]     The present invention relates generally to a shot blast machine with a projector having an impeller which burrs molded goods, treats the surface of molded goods and removes crud attached to the surface of works.  
       BACKGROUND OF THE INVENTION  
       [0002]     The conventional shot blast machine is used the projector with the impeller which is made of metal material.  
         [0003]     For this reason, when the projectile strikes the impeller during blasting, the projectile damages. In addition, since the impeller damages when the projectile with high grindability is used, it is impossible to use it.  
       SUMMARY OF THE INVENTION  
       [0004]     Accordingly, it is an object of the present invention to provide a shot blast machine that can increase the durability without damage of the impeller and projectile. It is another object of the present invention to provide a shot blast machine that can use the projectile with high grindability, with small particle and light gravity or the like. It is still another object of the present invention to provide a shot blast machine which can be used at any condition including extreme cold, normal temperature, wet condition and the like.  
         [0005]     The present invention is understood to encompass embodiments which include all or only a portion of the above objects, features and advantages which, unless recited in claims defining the invention, are understood not to limit interpretation of such claims. The above, and other objects, features and advantages of the present invention will become apparent from the following description read in conjunction with the accompanying drawings, in which like reference numerals designate the same elements.  
         [0006]     It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only, and are not intended as a definition of the limits of the invention. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0007]      FIG. 1  is a front view showing a first embodiment of the present invention;  
         [0008]      FIG. 2  is a side view showing a first embodiment of the present invention;  
         [0009]      FIG. 3  is a cross sectional view taken along a line of  3 - 3  in  FIG. 1 ;  
         [0010]      FIG. 4  is a vertical cross sectional view of a projector showing a first embodiment of the present invention;  
         [0011]      FIG. 5  is a cross sectional view taken along a line of  5 - 5  in  FIG. 4 ;  
         [0012]      FIG. 6  is an explanation view of a nozzle showing a first embodiment of the present invention;  
         [0013]      FIG. 7  is an explanation view of an operation showing a first embodiment of the present invention;  
         [0014]      FIG. 8  is a schematic view showing a second embodiment of the present invention;  
         [0015]      FIG. 9  is an explanation view of an operation showing a second embodiment of the present invention;  
         [0016]      FIG. 10  is a front view showing a third embodiment of the present invention;  
         [0017]      FIG. 11  is a cross sectional view taken along a line of  11 - 11  in  FIG. 10 ;  
         [0018]      FIG. 12  is an explanation view of an operation showing a third embodiment of the present invention;  
         [0019]      FIG. 13  is a schematic explanation view showing a fourth embodiment of the present invention;  
         [0020]      FIG. 14  is an explanation view of an operation showing a fourth embodiment of the present invention;  
         [0021]      FIG. 15  is a front view showing a fifth embodiment of the present invention; and  
         [0022]      FIG. 16  is a cross sectional view taken along a line of  16 - 16  in  FIG. 15 . 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0023]     Preferred embodiments of the present invention are described in more detail below referring to the accompanying drawings.  
         [0024]     An understanding of the present invention may be best gained by reference FIGS.  1  to  7 . Reference numeral  1  is a shot blast machine which burrs molded goods, treats the surface of molded goods and removes crud attached to the surface of works. The shot blast machine  1  is comprised of a case body  2 ; a table  4 , as a supporting tool supports a work  3 , installed into an upper portion of the case body  2 , forming of a perforated plate or mesh body; an openable door  5  attached to the case body  2  capable of taking the work  3  in and out the table  4 ; a picking device  7  with a vibrating screen, providing at a lower position of the table  4  in the case body  2  through the hopper  6 ; a liquid tank  8  provided liquid including water, cleaning liquid or the like sorted out by the picking device  7  therein, a projectile tank  9  provided the projectile therein, a small dust tank  10  provided small dusts therein, and a large dust tank  11  provided large dusts therein; a mixing tank  13  having a mixer  12  which mixes the liquid from the liquid tank  8  and projectile from the projectile tank  9 ; a projector  15  having a impeller  14  made of a high abrasion-resistant rubber, installing in the upper portion of the case body  2  capable of blasting out the liquid mixed the projectile to the table  4 ; a supplying channel  18  interposed a slurry pump  17  therebetween, the pump  17  sucks the liquid mixed the projectile in the mixing tank  13  and introduces in a nozzle  16  positioned into the projector  15 , a pump  19  which showers the liquid of the liquid tank  8  to the work  3  supported by the table  4 ; and a shower device  21  having a shower nozzle  20 .  
         [0025]     The projector  15  further includes a wheel cover  23  having an opening  22  provided at a lower portion thereof and forming a nozzle-insertion hole  24  at a wall surface of a side of suction and inserting fixedly the nozzle  16 ; the impeller  14  attached into the wheel cover  23  rotatably, being made of high abrasion-resistant rubber; and a high-speed motor  25  attached to the wheel cover  23 , capable of making the impeller  14  to drive at a high speed. In addition, the impeller  14  further includes one side plate  27  attached to a drive shaft  26  of the high-speed motor  25 , forming in the shape of a disc; a plurality of blades  28  fixed to a part except for a center portion of the side plate  27  in a radial pattern; and other side plate  30  fixed so as to cover the blades  28 , having a nozzle-insertion hole  29  formed at a part corresponding to the nozzle-insertion hole  24  of the wheel cover  23 .  
         [0026]     The above-mentioned shot blast machine  1  uses water as a liquid when it removes the weld flashes of the molded goods. In addition, it uses washing water when it removes the cruds attached at the surface of the work.  
         [0027]     When it is performed to blast, the projector  15 , pump  19 , slurry pump  17  and picking device  7  are driven after the work  3  is put on the table  4 . Thereby the liquid mixed the projectile of the mixing tank  13  is blasted from the nozzle  16  after it passes through the supplying channel  18  by the slurry pump  17 . The blasted liquid including the projectile is blasted to the work  3  on the table  4  by the impeller  14 , which rotates at high speed, of the projector  15 .  
         [0028]     In this way, since the projectile of the blasted liquid strikes the rotating impeller  14  with the high abrasion-resistant rubber, it can prevent the damage as in the case of the conventional metallic impeller, and the blasting from the impeller  14  can be carried out as in the case of the conventional metallic impeller.  
         [0029]     The liquid mixed the projectile blasted out by the projector  15  is supplied to the picking device  7  with the removed objects from the work through the hopper  6 , and the large dust, projectile, small dust are introduced into the large-dust tank  11 , projectile tank  9 , small-dust tank  10  and liquid tank  8  respectively after they are selected by the liquid. The liquid supplied into the liquid tank  8  is supplied into the shower nozzle  20  by the mixing tank  13  and pump  19  of the shower device  21 , and it is showered to the work  3  on the table  4 .  
         [0030]     In this way, the liquid mixed the projectile and liquid which is showered are circulated and used for blasting.  
         [0031]     Other embodiments of the present invention will now be described referring to FIGS.  8  to  16 . Through the drawings of the embodiments, like components are denoted by like numerals as of the first embodiment and will not be further explained in great detail.  
         [0032]     A second embodiment of the present invention is shown in  FIGS. 8 and 9  and is distinguished from the first embodiment by the fact that a high abrasion-resistant rubber sheet  39  is fixed to an inner wall surface of the wheel cover  23  by adhering, coating and the like in order to blast the liquid mixed the projectile to the work  3  on the table from the side and upper portion of the case body  2 ; and the projector  15  is replaced from two projectors  15 A,  15 A which adhered or coated a high abrasion-resistant rubber  41  on a surface of an impeller body  40  made of metal. A shot blast machine  1 A in this way according to the third embodiment has similar advantages to that according to the first embodiment.  
         [0033]     A third embodiment of the present invention is shown in FIGS.  10  to  12  and is distinguished from the first embodiment by the fact that a belt conveyor  31  as a supporting device is used, forming in the shape of a L-letter, capable of holding the work  3  and agitating it. A shot blast machine  1 B with the belt conveyor  31  according to the third embodiment has similar advantages to that according to the first embodiment.  
         [0034]     In addition, reference numerals  32 ,  33  and  34  are revolving shafts which are arranged at the case body  2  so as to form in the shape of a L-letter; reference numeral  35  is belt which is laid on the revolving shaft  32 ,  33  and  34  so as to formed in the shape of L-letter, having a plurality of through holes  36 ; reference numerals  37 ,  37  are guide rollers which are attached to the case body  2 , pressing the both edges of the belt  35  positioned between the revolving shafts  32  and  34 ; and reference numeral  38  is a reversible motor attached at the case body  2 , making the revolving shaft  33  to rotate in the forward and backward directions.  
         [0035]     A fourth embodiment of the present invention is shown in  FIGS. 13 and 14  and is distinguished from the first embodiment by the fact that the liquid and projectile which are selected by the picking device  7  are stored automatically by empty weight of the mixing tank  13  with the mixer  12 , and the liquid which overflows from the mixing tank  13  is supplied into the shower device  21 . A shot blast machine  1 C in this way according to the fourth embodiment has similar advantages to that according to the first embodiment.  
         [0036]     A fifth embodiment of the present invention is shown in  FIGS. 15 and 16  and is distinguished from the first embodiment by the fact that the projectile which are selected by the picking device  7  is stored into a projectile tank  42 , and the projectile is sucked from the projectile tank  42  by a sucking hose  43  and is supplied into the projector  15 . A shot blast machine  1 D in this way according to the fifth embodiment may be composed.  
         [0037]     As set forth above, the advantages of the invention are as follows: 
    (1) For the shot blast machine with the projector having the impeller, since the shot blast machine uses the impeller which is formed of the high abrasion-resistant rubber, it can prevent the damage of the projectile when it is blasted and strikes the impeller.    
 
         [0039]     Therefore, it can improve the durability of the projectile, and it is possible to manufacture it at a relatively low cost. 
    (2) As discussed above, it can reduce the noise which is produced when the projectile strikes the impeller.     (3) As discussed above, when the projectile with high grindability is used, it can be used without the damage of the impeller.    
 
         [0042]     Therefore, the different kinds of the projectile are used widely, and it can be used for the different kinds of work widely. 
    (4) As discussed above, since it can be reduced the weight of the impeller, it is possible to rotate at high speed.    
 
         [0044]     Therefore, the projectile can be blasted out in efficiency, and the projectile with small particles and light gravity can be used. 
    (5) Claim  2  has the same effect as the above (1) to (3).     (6) Claim  3  has the same effect as the above (1) to (4), the projector with the impeller blasts out the liquid with the projectile widely, and it can burr molded goods, treats the surface of molded goods and removes crud attached to the surface of works.     (7) As discussed above, since the liquid mixed the projectile can be supplied into the projector with the impeller by the pump, its structure is simple, and it can be performed to carry the liquid mixed the projectile smoothly.     (8) As discussed above, since the liquid mixed the projectile can be supplied into the projector with the impeller by the pump and can be blasted out to the work by the projector so as to remove the weld flash of the molded goods, it is not necessary to accelerate the speed and increase pressure for the carrying of the liquid mixed the projectile to the projector, its structure is simple, it can carry it certainly.     (9) Claim  4  has the same effect as the above (1) to (7), and the projector has a simple structure and it is easy to manufacture. In addition, since the slurry pump is used, it can supply the liquid with the projectile that has staying power in efficiency.    
 
       INDUSTRIAL APPLICABILITY  
       [0050]     The present invention is utilized in the industry to manufacture the shot blast machine mainly.

Technology Category: 7