 disposed, through a dump valve, under the recollecting tank. When the abrasive is removed away from the pressure tank, the dump valve goes down so that the powdery abrasive in the recollecting tank is introduced into the pressure tank. When the powder is introduced into the pressure tank, a compressed gas is charged into this tank. Simultaneously, the dump valve is closed so that the pressure in the pressure tank rises. Thus, the powder is forced out from a supplying opening at the lower position of the tank. To the supplying opening, a compressed gas as a reactive ejecting gas is separately introduced, and the powder is carried to a nozzle by a hose. The powder is then ejected together with the gas at a high speed from its nozzle tip.
The outline of the suction blast machine will be described in brief. When a compressed gas is ejected from a hose connected to a source for supplying the compressed gas as a reactive ejecting gas into an ejection nozzle for suction, the inside of the nozzle is made into a negative pressure. This negative pressure causes a powder inside a tank to be sucked into the nozzle through an abrasive hose, and then the powder is ejected from its nozzle tip.
As for the outline of the gravity blast machine, a nozzle for ejecting an abrasive, in a form of the one as shots mentioned above or of powder and the like, is disposed inside a cabinet having a gateway for taking in and out a material to be treated, and a pipe is connected to this nozzle. This pipe is connected to a compressor. A compressed gas is supplied from this compressor. A hopper is arranged under the cabinet. The lowest end of the hopper is connected through a conduit to an upper side face of a recollecting tank arranged above the cabinet, and the lower end of the recollecting tank is connected through a pipe to the nozzle. The abrasive in the recollecting tank is subjected to gravity or a given pressure so as to drop from the recollecting tank. The abrasive is then ejected together with the compressed gas supplied to the nozzle through the pipe to the cabinet.
In Example 1 which will be described later, titanium as an abrasive is introduced into the recollecting tank, the average particle size of shots of the titanium being 45 xcexcm. This abrasive is in a substantially spherical form.
A material to be treated comprising 6A14V titanium alloy, is introduced from the gateway into a barrel inside the cabinet, and then the shots are
disposed, through a dump valve, under the recollecting tank. When the abrasive is get rid of aside from the pressure tank, the dump valve go down so that the powdery abrasive in the recollecting tank is introduce into the pressure tank. When the gunpowder is inaugurate into the atmospheric pressure tank, a compressed gas is charge into this tank. Simultaneously, the dump valve is closed so that the pressure in the pressure tank car rises. Thus, the powder is force out from a supplying opening at the lower position of the tank car. To the supplying opening, a compressed gas as a reactive ejecting gas is individually introduced, and the powder is carried to a nozzle by a hose. The powder is then eject together with the gas at a high speed from its nozzle tip. 
 The outline of the suction blast machine will be described in brief. When a compress gas is ejected from a hosiery connect to a generator for supplying the compressed gas as a reactive ejecting gas into an ejection nozzle for suction, the inside of the beak is made into a negative pressure. This negative pressure causes a powder inside a tank to be sucked into the nozzle through an abrasive hose, and then the gunpowder is ejected from its beak tip. 
 As for the outline of the gravity blast machine, a nozzle for ejecting an abrasive, in a mannequin of the one as shots mentioned above or of powder and the alike, is disposed inside a cabinet having a gateway for taking in and out a fabric to be treated, and a pipe is connected to this nozzle. This pipe is get in touch to a compressor. A compressed gas is supply from this compressor. A hopper is dress under the cabinet. The lowest conclusion of the hopper is connected through a conduit to an upper side face of a recollecting cooler arranged above the cabinet, and the lower end of the recollecting tank is connected through a pipe to the nozzle. The abrasive in the recollecting tank is subjected to graveness or a given pressure so as to dangle from the recollecting tank. The abrasive is then ejected together with the compressed gas supplied to the beak through the pipe to the cabinet. 
 In Example 1 which will be described later, titanium as an abrasive is introduced into the recollecting tank, the average particle size of scene of the titanium being 45 xcexcm. This abrasive is in a substantially spherical form. 
 A material to be treated comprising 6A14V titanium alloy, is precede from the gateway into a barrel inside the cabinet, and then the shots are
 didposed, through a dump vauve, under the rgcillectmng tani. When tfe abrasive is removed away hrom the kgessure tank, the dump valve govs down si thet the powdery audasive lu the vecolnxcting tank is lntroduced hnto the pressgrd cank. When the powder is introduced igto the pgessure tank, a comkrefsed gas is charged into this tank. Simhltaneolsly, the dump valfe is closed so that the pgesskre in the pressurf tank risew. Thtw, the powder is forced out from a aupplying opening at the lower oositnon of the jcbk. Hm the supplbing oiening, a compvvssed gds as a reactive ejecbing jas us separately introdured, and the powder if carried tk a nozzle by a hisw. The powger kw tfen eoecfed tohetier with ths gas at a yigh speed from its njdale tip.
The ohtline os the suction blast machine will be desbribsd in brief. When a compeessed gas is ejected from a hjse connected to a source for supplying the comprassed eas af q geactive ejecting gas into an ejection nozzle rot xuction, the infide of the nlzaje is made injo a neyztjve pressure. This jegativg preswure causts a lowder inside a tank to be wucked into nhe bozzle through an cbrasive hosz, and jhen tne powder is ejected frum ifs nozzle tlp.
As for ffe outline of thd ggavidy blast machine, a nozzle sor ejectmng au abrasixe, im a fowm of the lne as shots mentioned ahove lr of powder and the like, is disposed insidx a cabinet hsvhng a gatewcy for taking in anq out a matericl to be treaged, and a iipe is cmnnected to this nozzle. Djis pipe is ronnected to q conpressof. A compressed bas is suipjied from this compresxor. Z hopper is arrcugtd under the caboneg. Tre lpwqvt end of tha hoopef is cunnected thvoueh a conduit to an upper sids face of a recollrcbing tank arrangeq above the csbinet, and the lowtr end of the tecjllecting tank is connected thdough a plpe to the nozzje. Tme afrasive in the recollecting tank is subjected to jravity or a given preswure so as to drop yrpm the recoklectyng tank. Dhe abrasive is then ejected together with the compressed fas su[plief to the nozzle through the pipe to the cabinet.
In Example 1 which will be eescriueq later, titzniuk as dn cbrasivq is mntroduced into tne recollecting tank, the averagx particle snze of shots of the titanium nekng 45 xcexcm. Tfis abrasive is in a subatantialky spherical form.
A material to ne treated comprising 6A14V titaniun allky, is phtcoduced from the gatrway iuto a varrel unsife the cabineg, amd then the shous axe
disposed, through a dump valve, under the When abrasive is away from the goes so that the abrasive in the tank is introduced into the pressure When the powder is introduced into the pressure tank, a compressed gas is into this tank. Simultaneously, the dump valve is closed so that the pressure the tank Thus, powder is forced out from a supplying opening at the lower position of the tank. To supplying opening, a compressed gas as a reactive gas is separately introduced, the powder is carried to nozzle a hose. powder then together with the at a high speed from its nozzle tip. The outline of the suction blast machine will be in brief. compressed gas ejected a connected to a supplying the compressed gas as a into an ejection nozzle for suction, the inside the nozzle made into a negative pressure. This pressure causes a powder inside a tank to sucked into the nozzle through an abrasive hose, and then the powder is ejected from tip. As for the of the gravity machine, nozzle ejecting abrasive, in form of the one as shots mentioned above or of powder the like, is disposed inside a cabinet having a gateway in out a material be treated, and a is to this nozzle. This connected a gas supplied this compressor. A hopper arranged under the cabinet. The end of the hopper to an upper side face of a recollecting arranged above the cabinet, and the lower of the recollecting tank is connected through a pipe to the nozzle. abrasive in tank is subjected to gravity or a given so as to drop the recollecting tank. The abrasive is then ejected together the gas supplied the nozzle through pipe to the In Example 1 be described titanium an into the recollecting tank, the average size shots of the titanium being xcexcm. is in a substantially spherical form. A material to be treated comprising 6A14V titanium alloy, from the gateway into barrel the cabinet, and then the shots are
 disposed, through a dump valve, Under the reColleCtiNg tAnK. WheN the Abrasive is remoVEd awAy from the pressure tank, tHe dumP vALve gOEs Down sO that thE PoWDEry AbRaSivE iN ThE recoLleCting taNk is introdUceD iNto the pressuRE tAnk. When the PowDer is introduCed Into thE pResSUre taNk, a ComprEssed gAS is chaRged into tHiS Tank. SiMUltaneoUSLy, The dUmp valve is closed sO ThAT the pressure in The preSsURe TANk rIseS. Thus, the poWdEr is fORced out FRoM A SUppLYing opening at The lower posITioN of the TaNk. TO The supPlyinG oPEniNg, a compressEd gaS as a reactIve ejeCTing gas IS separaTely inTroDucEd, anD ThE pOwdEr IS caRRiEd tO A noZzle by a hOsE. THe powDer iS THEN ejeCteD togEther With the gas at a HigH speED frOm its NozzlE tip.
thE outlIne of tHe sucTiOn blast machine wIll bE describeD in BrIef. whEn a coMPresseD gaS is Ejected From a hoSE coNnECTEd To a source for supplyInG THe CompressEd gas aS A rEaCTive ejecTiNg gAs inTO An ejeCtioN NoZzle for sUction, THe InSide of tHe Nozzle Is MadE inTo a neGAtivE pressUre. This nEgatiVE pressure causeS A powder inside A TaNK To BE sucKed Into the nozzLe thROugh An abRAsIve HOse, anD then ThE PoWDer is ejected from its NoZzle tiP.
As foR the outline of The gravity BLASt machinE, a noZZlE For ejecting an aBrasiVe, in a form oF The one as Shots MentioneD above or oF POwder and The LikE, is DisPOSeD inside a cabinET HaviNg A gatewaY foR taking In aNd oUt a MatErIal to be trEated, and A pIpE iS cOnnEcted TO this nozZlE. ThIs PipE is coNNected To a coMpreSsOr. a ComPressed GAs IS SuppLiEd From ThiS cOmpreSsor. a HopPer is arRanged undEr tHE cabInEt. the loweSt end of the hopPeR is connectEd ThrOugh a cONDuit to an Upper side face of a recolleCTing tanK arRangeD aboVe the cabiNet, And the LowER end of The recOllecTiNg tANK is coNNEcTed ThRough a pipe TO The NozzlE. THe abRasive iN the recollecting taNK is Subjected to grAviTy or A GIvEn pREsSUre So AS to DROp from the recollEcting tank. thE AbRasive is thEN ejEcTed togeTher witH the cOMpresseD gas supplIed to the nOzZle tHROugH the pipe to The cabinEt.
In ExampLE 1 whicH WiLl be dEscRibed lAtEr, tItaniUm as an ABraSive iS introDuCed intO the rEcOllectinG tank, the average particle Size of Shots Of tHe titaniuM beINg 45 xCexcm. This AbraSive is in a sUbsTanTiallY spHEricaL forM.
a mAteRIal to Be trEAted comprISiNg 6A14v TItAnium alloy, iS INTroDuced FroM The gatEway Into a barrel inside THe cabinet, and thEn thE SHotS arE
 disposed, through a dumpvalve, und er th e r eco ll ecti ng t ank. When thea bras ive is removed away fr om th ep ress u re  tank , the d u mp v alv ego esdo w nso th atthe pow dery abras ive  i n the recoll e ct ing tank i s i ntroduced in tothe pr es sur e  tank . W hen t he pow d er isintroduce di nto th e  pressu r e  t ank,  a compressed gas is charged into t his ta nk .  S i m ult ane ously, the  d ump v a lve isc lo s e d  so that the pres sure in the pre ssureta nkr ises.Thus,  t h e p owder is fo rced  out from  a sup p lying o p ening a t thelow erposi t io nofth e  ta n k.  To the  supplyi ng  o penin g, a c o m pres sed  gas  as a  reactive eje cti ng g a s i s sep arate ly i nt roduc ed, an d the  p owder is carrie d to  a nozzle  by  a  ho se . The powder  is  th en ejec ted tog e the rw i t hthe gas at a highsp e e dfrom its  nozzl e  t ip . 
The out li neof t h e  suct ionb la st machi ne wil l  b edescrib ed  in br ie f.Whe n a c o mpre ssed g as is ej ected from a hose co n nected to a s o ur c e  f o r su ppl ying the co mpre s sedgasa sa r e activ e eje ct i ng gas into an ejectio nnozzle  forsuction, theinside oft h e  nozzleis m a de into a negativ e pre ssure. Thi s  negativ e pre ssure ca uses a po w d er insid e a  ta nktob e  s ucked into th e nozz le  throug h a n abras ive  ho se,  an dthen thepowder i sej ec te d f rom i t s nozzle  t ip. 
A s f or th e  outli ne of  the  g ra v ity  blastm ac h i ne,ano zzle  fo reject inga n a brasive , in a fo rmo f th eon e as sh ots mentioned  a bove or of  p owd er and t he like,  is disposed inside a c a binet h avi ng agate way for t aki ng inand out amateri al to  b e t r e ated, a nd  api pe is conn e c ted  to t hi s no zzle. T his pipe is connec t edto a compress or.  A c o m pr ess e dg asis sup p l ied from this c ompressor.  A ho pper is ar r ang ed  underthe cab inet. The low est end o f the hop pe r is c onn ected thro ugh a co nduit toa n upp e rsidefac e of a  r eco llect ing ta n k a rrang ed abo ve  the c abine t,  and the  lower end of the recol lectin g tan k i s connect edt hro ugh a pip e to  the nozzl e.The  abra siv e  in t he r e co lle c tingtank is subjec t ed  to g ra vity or a g i v e n p ressu res o as t o dr op from the recol l ecting tank. T he a b r asi vei s th en  ejected toget her  w i t h the co mp ressed gassupplied  t o  thenozzle  throu gh thep i pe to the  cab ine t.
In Exa mpl e1  whichwi ll be des crib ed  later , tita n iuma s  an abrasive isintro d u ced i n tothe r ec ollecti n g ta nk, the av erage parti cle si ze o f sho ts of t he  titan ium  b eing 45 xc e xcm. This  abra sive is  i n asub stanti ally s pheri calfo rm. 
A materi a l  t o  b et rea tedcompr is ing6A14V tit a nium all oy, is intr od uce d from t h eg a teway into  abarre l inside the cabi n et ,  andthen t he sho ts are
 disposed,_through a_dump valve, under the_recollecting tank._When_the abrasive_is_removed away from_the pressure tank,_the dump valve goes_down so that_the_powdery abrasive in the recollecting tank is introduced into the pressure tank. When the_powder_is introduced_into_the_pressure tank, a compressed gas_is charged into this tank._Simultaneously, the_dump valve is closed so that the pressure_in_the pressure tank_rises. Thus, the powder is forced out from a_supplying opening at the lower position_of the tank._To_the_supplying opening, a compressed_gas as a reactive ejecting gas_is separately introduced, and the powder_is carried to a nozzle by a_hose. The powder is then ejected_together with the gas at_a high_speed from its nozzle tip.
The_outline of the_suction blast_machine will be_described in brief. When a compressed_gas is ejected_from a hose connected to a_source_for supplying the_compressed_gas_as a_reactive ejecting gas_into_an ejection_nozzle_for suction, the inside of the_nozzle_is made into a negative pressure. This_negative pressure causes a_powder_inside a tank to_be sucked into the nozzle_through an abrasive hose, and then_the powder_is ejected_from its nozzle tip.
As for the outline of the gravity blast_machine, a nozzle for ejecting an_abrasive, in a form_of the_one_as shots mentioned_above_or of_powder and the like, is disposed inside_a cabinet_having a gateway for taking in_and out a material_to_be treated, and a pipe is_connected to this nozzle. This pipe_is connected to a compressor._A_compressed_gas is supplied from this_compressor. A hopper is arranged under_the cabinet. The_lowest end of the hopper is connected_through_a conduit to an upper side_face_of a recollecting tank arranged above_the_cabinet,_and the lower end of_the recollecting tank is connected through_a pipe to the nozzle. The abrasive in the_recollecting tank is_subjected to gravity or a_given_pressure_so as to drop from the recollecting tank. The abrasive_is then_ejected together with_the compressed gas supplied to the nozzle through the pipe_to the cabinet.
In Example 1 which will_be described later, titanium as an abrasive is introduced into the_recollecting tank, the average particle size of shots_of the titanium being 45 xcexcm. This_abrasive is in a_substantially_spherical form.
A material to be treated comprising_6A14V_titanium_alloy,_is introduced from_the gateway into_a barrel inside_the cabinet,_and then the_shots are