Method for feeding an injection material under pressure, a method for blasting using the method, a device for pressurized feeding an injection material under pressure, and a blasting device having the device

Abstract

To provide an injection material pressurized feeding method to stably supply a fixed quantity of an injection material without aggregation and consolidation of the injection material even if the injection material having small particle diameter is used for blasting. A fixed quantity of the injection material is introduced from the injection material tank 2 to a cylindrical pressurizing tank 11 provided between the injection material tank 2 of the blasting device 1 and a blast nozzle, and introduction of compressed stirring gas is started at a deposition part of the injection material introduced in the pressurizing tank 11 then the injection material is stirred in the pressurizing tank 11 , and an inside of the pressurizing tank 11 is pressurized by starting introduction of compressed pressurizing gas from a pressurizing tank side wall 11 b , thereby the injection material in the state of stirring is pressure-fed to the blast nozzle.

1 . A method for feeding an injection material under pressure comprising the steps of; 
 introducing a fixed quantity of injection materials from an injection material tank of a blasting device to a cylindrical pressurizing tank provided between the injection material tank and a blast nozzle,    starting introduction of compressed stirring gas at a deposition part for the injection material introduced from the pressurizing tank to stir the injection materials in the pressurizing tank, and    starting introduction of compressed pressurizing gas from a side wall of the pressurizing tank to pressurize the inside of the pressurizing tank, and    pressurized feeding the injection materials of a state of stirring to the blast nozzle.    
   
   
       2 . The method for feeding the injection material under pressure according to  claim 1 , wherein introduction of the compressed pressurizing gas to the pressurizing tank is started later than introduction of the compressed stirring gas.  
   
   
       3 . The method for feeding the injection material under pressure according to  claim 1 , wherein pressure of the compressed pressurizing gas is lower that that of the compressed stirring gas.  
   
   
       4 . The method for feeding the injection material under pressure according to  claim 1 , wherein swirling flow along the inner wall of the pressurizing tank is generated in the pressurizing tank with the compressed pressurizing gas.  
   
   
       5 . The method for feeding the injection material under pressure according to  claim 4 , wherein, a cylinder having a diameter smaller than an inner diameter of the pressurizing tank is provided in the pressurizing tank, so that the swirling flow is generated by introducing the compressed pressurizing gas between the inner wall of the pressurizing tank and the outer wall of the cylinder.  
   
   
       6 . The method for feeding the injection material under pressure according to  claim 1 , wherein oscillation is given to the pressurizing tank.  
   
   
       7 . The method for feeding the injection material under pressure according to  claim 1 , wherein an inside of the pressurizing tank is heated.  
   
   
       8 . A method for blasting wherein the injection materials pressure-fed by the method according to  claim 1  are injected on a workpiece.  
   
   
       9 . A product formed by the method for blasting by injecting the injection material having particle size of #3000 (a particle diameter of a point of accumulation heights of 50% (dv-50 value) is 4.0 μm) or smaller in the blasting method according to  claim 8 .  
   
   
       10 . A device for pressurized feeding an injection material under pressure comprising a pressurizing tank which is provided between an injection material tank of the blasting device and a blast nozzle to introduce the injection material from the injection material tank, 
 wherein the pressurizing tank comprising;    an introduction part for compressed stirring gas opening at a deposition part of the injection material introduced in the pressurizing tank,    an introduction pipe for compressed pressurizing gas opening in a side wall of the pressurizing tank positioned above an opening position of the introduction portion for the compressed stirring gas,    a feeding pipe opening in the pressurizing tank and communicating with the blast nozzle, and    a compressed gas supply means to supply compressed gas in the introduction part and the introduction pipe.    
   
   
       11 . The device for pressurized feeding the injection material under pressure according to  claim 10 , wherein the compressed gas supply means comprises a start delaying means to supply the compressed gas to the introduction pipe for the compressed pressurizing gas later than supply of the compressed gas to the introduction part for the compressed stirring gas.  
   
   
       12 . The device for pressurized feeding the injection material under pressure according to  claim 10 , wherein the compressed gas supply means comprises a pressure adjuster to supply compressed pressurizing gas to the introduction pipe for the compressed stirring gas, and a pressure of the compressed gas supplied to the introduction pipe is lower than that of the compressed gas supplied to the introduction part.  
   
   
       13 . The device for pressurized feeding the injection material under pressure according to  claim 10 , wherein the introduction part of the compressed stirring gas comprises a guide member opening to a plurality of stirring ports.  
   
   
       14 . The device for pressurized feeding the injection material under pressure according to  claim 10 , wherein the inner wall of the pressurized tank is swelled and inclined to a bottom part of the pressurizing tank in outer peripheral direction.  
   
   
       15 . The device for pressurized feeding the injection material under pressure according to  claim 10 , wherein the introduction pipe for the compressed pressurizing gas is provided in a direction of which the compressed pressurizing gas introduced through the introduction pipe generates swirling flow along the inner wall of the pressurizing tank  
   
   
       16 . The device for pressurized feeding the injection material under pressure according to  claim 10 , wherein a swirling induction body is provided in the inner wall of the pressurizing tank in a direction of which the compressed pressurizing gas introduced in the pressurizing tank generates the swirling flow along the inner wall of the pressurizing tank.  
   
   
       17 . The device for pressurized feeding the injection material under pressure according to  claim 10 , wherein the cylinder having an inner diameter smaller than that of the pressurizing tank is provided in the pressurizing tank with spacing from the inner wall of the pressurizing tank to generate the swirling flow along the inner wall of the pressurizing tank between the outer wall of the cylinder and the inner wall of the pressurizing tank by the compressed pressurizing gas introduced in the pressurized tank.  
   
   
       18 . The device for pressurized feeding the injection material under pressure according to  claim 17 , wherein the bottom part of the cylinder has an almost inverted conical shape as it goes downwardly.  
   
   
       19 . The device for pressurized feeding the injection material under pressure according to  claim 17 , wherein the swirling induction body is provided on the outer wall of the cylinder in the direction of which the swirling flow is generated.  
   
   
       20 . The device for pressurized feeding the injection material under pressure according to  claim 15 , wherein the feeding pipe is provided at an extension of a swirling direction of the swirling flow.  
   
   
       21 . The device for pressurized feeding the injection material under pressure according to  claim 10 , comprising an oscillation generator to give oscillation to the pressurizing tank.  
   
   
       22 . The device for pressurized feeding the injection material under pressure according to  claim 10 , comprising a heater to heat an inside of the pressurizing tank.  
   
   
       23 . A blasting device having the device for feeding the injection material under pressure according to  claim 10.