Digital full-automatic die casting apparatus

Abstract

A digital full-automatic die casting apparatus, including a longitudinal mounting plate, a mold arranged on a front surface of the longitudinal mounting plate, a mold locking device including a plurality of mold locking mechanisms surrounding a periphery of the mold, an injection device arranged on a back surface of the longitudinal mounting plate, and a PLC controller electrically connected to the mold locking device and the injection device respectively, The mold locking mechanism includes a mold locking fixed-point assembly arranged on the longitudinal mounting plate, and a hydraulic mold locking assembly connected to the mold locking fixed-point assembly; the mold locking fixed-point assembly includes a fixed-point servo motor arranged on the longitudinal mounting plate and electrically connected to the PLC controller, a fixed-point screw connected to the mold, a nut screwed to the fixed-point screw, and a transmission structure connected between the fixed-point servo motor and the nut.

1 . A digital full-automatic die casting apparatus, comprising:
 a longitudinal mounting plate;   a mold provided on a front surface of the longitudinal mounting plate;   a mold locking device comprising a plurality of mold locking mechanisms surrounding a periphery of the mold;   an injection device arranged on a back surface of the longitudinal mounting plate, wherein an injection nozzle of the injection device extends into the mold;   a PLC controller which is electrically connected to the mold locking device and the injection device respectively;   wherein each mold locking mechanism comprises a mold locking fixed-point assembly arranged on the longitudinal mounting plate, and a hydraulic mold locking assembly connected to the mold locking fixed-point assembly; the mold locking fixed-point assembly comprises a fixed-point servo motor arranged on the longitudinal mounting plate and electrically connected to the PLC controller, a fixed-point screw connected to the mold, a nut screwed to the fixed-point screw, and a transmission structure connected between the fixed-point servo motor and the nut; and the hydraulic mold locking assembly acts on the nut.   
     
     
         2 . The digital full-automatic die casting apparatus according to  claim 1 , wherein the hydraulic mold locking assembly comprises a positioning seat arranged on the longitudinal mounting plate, an oil hydraulic cylinder arranged on the positioning seat and electrically connected to the PLC controller, a locking structure arranged in the oil hydraulic cylinder and acting on the nut and/or the fixed-point screw, and a release structure arranged in the oil hydraulic cylinder and acting on the nut, wherein the nut is arranged in the positioning seat and extends into the oil hydraulic cylinder; the locking structure comprises a locking piston arranged in the oil hydraulic cylinder and located behind the nut, and a plurality of locking springs arranged between the locking piston and the nut; and the release structure comprises at least one reverse thrust sleeve sleeved around the periphery of the nut, and a plurality of reverse thrust springs arranged between the at least one reverse thrust sleeve and the positioning seat, an annular boss is protruded on the periphery of the nut; the locking structure is arranged behind the annular boss; the release structure is arranged in front of the annular boss; and a bearing is respectively arranged between the plurality of locking springs and the annular boss, and between the at least one reverse thrust sleeve and the annular boss. 
     
     
         3 . The digital full-automatic die casting apparatus according to  claim 1 , wherein the transmission structure is mainly composed of a driving wheel arranged on an output shaft of the fixed-point servo motor, a driven wheel connected to the nut, and a transmission belt enclosed between the driving wheel and the driven wheel. 
     
     
         4 . The digital full-automatic die casting apparatus according to  claim 1 , wherein the mold comprises a mold mounting base arranged on a front surface of the longitudinal mounting plate, and a plurality of mold locking sliders arranged on the mold mounting base and connected to the fixed-point screw; and the injection nozzle extends through the front face of the longitudinal mounting plate and is interposed among the plurality of mold locking sliders. 
     
     
         5 . The digital full-automatic die casting apparatus according to  claim 1 , wherein the injection device comprises an injection mechanism arranged on a back surface of the longitudinal mounting plate, and a longitudinal pushing mechanism connected to the injection mechanism, wherein the injection mechanism comprises a furnace, an injection mounting seat arranged on the furnace, the injection nozzle inserted transversely into the injection mounting seat, and an injection pushing assembly arranged in the injection mounting seat and connected to the longitudinal pushing mechanism. 
     
     
         6 . The digital full-automatic die casting apparatus according to  claim 5 , wherein the longitudinal pushing mechanism comprises a longitudinal pushing mounting seat, a longitudinal pushing servo motor arranged on the longitudinal pushing mounting seat and electrically connected to the PLC controller, a driving gear connected to an output shaft of the longitudinal pushing servo motor, an eccentric wheel structure transversely arranged on the longitudinal pushing mounting seat and engaged with the driving gear, and a longitudinal pushing structure longitudinally arranged on the longitudinal pushing mounting seat and connected to the eccentric wheel structure. 
     
     
         7 . The digital full-automatic die casting apparatus according to  claim 6 , wherein the eccentric wheel structure mainly consists of a reinforcing shaft arranged on the longitudinal pushing mounting seat, and an eccentric wheel rotatably connected to the reinforcing shaft and engaged with the driving gear, wherein the rotating shaft of the eccentric wheel is connected to the longitudinal pushing structure. 
     
     
         8 . The digital full-automatic die casting apparatus according to  claim 6 , wherein the driving gear and the eccentric wheel are cone gears. 
     
     
         9 . The digital full-automatic die casting apparatus according to  claim 8 , wherein the longitudinal pushing structure comprises a longitudinal push shaft; the rotating shaft of the eccentric wheel is connected to the longitudinal push shaft via a lateral translation structure comprising a linkage block arranged in the longitudinal push shaft and sleeved on a periphery of the rotating shaft of the eccentric wheel; and a movable cavity for lateral translation of the linkage block is formed in the longitudinal push shaft. 
     
     
         10 . The digital full-automatic die casting apparatus according to  claim 9 , wherein the lateral translation structure further comprises at least one translation slider arranged outside the longitudinal push shaft, the translation slider being connected to the linkage block and/or sleeved on the periphery of the rotating shaft of the eccentric wheel; and at least one sliding groove for lateral translation of the translation slider is formed on an outside edge of the longitudinal push shaft. 
     
     
         11 . The digital full-automatic die casting apparatus according to  claim 10 , wherein the longitudinal pushing structure further comprises a buffering push shaft connected to an upper end of the injection pushing assembly; a cavity is formed in the longitudinal push shaft; an upper end of the buffering push shaft is movably inserted into the cavity; and nitrogen or inert gas is filled in the cavity and above the buffering push shaft. 
     
     
         12 . The digital full-automatic die casting apparatus according to  claim 6 , wherein the longitudinal pushing mechanism comprises a hydraulic cylinder, a longitudinal pushing rod connected between an output shaft of the hydraulic cylinder and the injection pushing assembly, and a cooling water passage plate arranged between the hydraulic cylinder and the injection mechanism, wherein a circulating water passage set is formed in the cooling water passage plate. 
     
     
         13 . The digital full-automatic die casting apparatus according to  claim 12 , wherein the circulating water passage set comprises an upper circulating water passage, a lower circulating water passage, and a longitudinal water passage communicating with the upper circulating water passage and the lower circulating water passage, respectively. 
     
     
         14 . The digital full-automatic die casting apparatus according to  claim 13 , wherein the upper circulating water passage and the lower circulating water passage are the same, and respectively comprise a first X-axis water channel arranged on one side of the inside of the cooling water passage plate, a second X-axis water channel arranged on the other side of the inside of the cooling water passage plate, a first Y-axis water channel respectively communicating with the first X-axis water channel and the second X-axis water channel and extending from one side of the inside of the cooling water passage plate to the other side, and a second Y-axis water channel arranged on the other side of the inside of the cooling water passage plate and communicating with the second X-axis water channel, wherein one end of the first X-axis water channel, one end of the second X-axis water channel, one end of the first Y-axis water channel and one end of the second Y-axis water channel respectively extend to the outside of the cooling water passage plate. 
     
     
         15 . The digital full-automatic die casting apparatus according to  claim 13 , wherein an abdicating side groove through which the longitudinal pushing rod passes and moves up and down is formed on the cooling water passage plate. 
     
     
         16 . The digital full-automatic die casting apparatus according to  claim 6 , wherein the injection pushing assembly comprises a feeding rod arranged in the injection mounting seat and extending to a lower end surface of the injection mounting seat, an injection plunger connected to the longitudinal pushing mechanism and inserted into the feeding rod, and a feed piston movably arranged in the feeding rod and located below the injection plunger, wherein a material chamber penetrating the upper end surface and the lower end surface of the feeding rod is formed in the feeding rod, and the injection plunger and the feed piston are both movably inserted into the material chamber; and the material chamber is in communication with the injection nozzle. 
     
     
         17 . The digital full-automatic die casting apparatus according to  claim 16 , wherein the material chamber is mainly formed by an upper chamber and a lower chamber in communication; the feed piston is mainly composed of a material blocking portion movable in the upper chamber, and a guide post connected to the lower end of the material blocking portion and movable in the lower chamber, wherein an inner fitting slope is formed on an outer surface of the material blocking portion, and an outer fitting slope matching the inner fitting slope is formed on an inner wall of the upper chamber close to the lower chamber; three planes extending along the length direction of the guide post are formed on the outer side surface of the guide post; a seamed edge is formed between each adjacent two planes, the seamed edge being in contact with the inner wall of the lower chamber; the cross section of the guide post is triangular; and the guide post divides the lower chamber into three feed channels. 
     
     
         18 . The digital full-automatic die casting apparatus according to  claim 6 , wherein the injection device further comprises an automatic mold correction mechanism including a mold correction mounting base plate slidably arranged on a back surface of the longitudinal mounting plate, a lateral mold correction assembly connected to the mold correction mounting base plate, and a longitudinal mold correction assembly connected to the mold correction mounting base plate, wherein the lateral mold correction assembly comprises a lateral servo motor electrically connected to the PLC controller, a lateral linkage rod connected to the injection mounting seat, and a lateral screw connected to the lateral servo motor and screwed to the lateral linkage rod; the lateral linkage rod and the lateral screw are respectively mounted on the mold correction mounting base plate via at least one mounting block, and the lateral linkage rod and the lateral screw movably penetrate the mounting block; the longitudinal mold correction assembly comprises a longitudinal servo motor arranged on the longitudinal mounting plate and electrically connected to the PLC controller, a longitudinal linkage rod connected to the mold correction mounting base plate, and a longitudinal screw connected to the longitudinal servo motor and threaded to the longitudinal linkage rod. 
     
     
         19 . The digital full-automatic die casting apparatus according to  claim 1 , further comprising an injection locking mechanism including an electric servo cylinder electrically connected to the PLC controller, and a joint assembly connected between the servo electric cylinder and the injection device, wherein the joint assembly comprises a connecting lug connected to an output shaft of the electric servo cylinder, a joint rotating shaft arranged on the connecting lug, and a linkage plate rotatably connected to the joint rotating shaft, the linkage plate being connected to the injection device. 
     
     
         20 . The digital full-automatic die casting apparatus according to  claim 1 , further comprising an automatic loading device electrically connected to the PLC controller, the automatic loading device comprising a mounting bracket, a Y-axis moving mechanism arranged on the mounting bracket, an X-axis moving mechanism mounted on the mounting bracket and slidably arranged on the Y-axis moving mechanism, a Z-axis moving mechanism arranged on the X-axis moving mechanism, a feedstock gripping mechanism connected to the Z-axis moving mechanism, and a floating ball level gauge arranged in the furnace of the injection device and electrically connected to the PLC controller, wherein the X-axis moving mechanism, the Y-axis moving mechanism, the Z-axis moving mechanism and the feedstock gripping mechanism are respectively electrically connected to the PLC controller; the feedstock gripping mechanism comprises a mounting frame connected to the Z-axis moving mechanism, a clamping cylinder arranged on the mounting frame and electrically connected to the PLC controller, a driving rod structure connected to an output shaft of the clamping cylinder, and a material clamping structure respectively connected to the mounting frame and the driving rod structure; the material clamping structure comprises a left clamping joint and a right clamping joint rotatably connected to the mounting frame respectively, wherein the left clamping joint and the right clamping joint are cross-connected via a central rotary shaft, and the driving rod structure is connected to the central rotary shaft; the left clamping joint and the right clamping joint have the same structure, respectively comprising an upper joint rotatably connected to the mounting frame, a lower joint rotatably connected to the upper joint, and a clamping hook connected to the lower joint, wherein the lower joint is mainly composed of an upper longitudinal joint rod, a lower longitudinal joint rod, and an oblique joint rod integrally connected between the upper longitudinal joint rod and the lower longitudinal joint rod, and the central rotary shaft is inserted at a position of the oblique joint rod to rotatably connect the left clamping joint and the right clamping joint; the driving rod structure comprises a connecting block connected to the output shaft of the clamping cylinder, and two driving rods connected to two ends of the connecting block and respectively connected to the central rotary shaft; the Y-axis moving mechanism comprises a Y-axis servo motor arranged on one end of the mounting bracket and electrically connected to the PLC controller, a Y-axis driving wheel connected to the output shaft of the Y-axis servo motor, a Y-axis driven wheel arranged on the other end of the mounting bracket, a Y-axis transmission belt surrounding the periphery of the Y-axis driving wheel and the Y-axis driven wheel, and at least one Y-axis sliding rail arranged on the mounting bracket and extending along the length direction of the Y-axis transmission belt;
 the X-axis moving mechanism comprises an X-axis base plate slidingly arranged on a Y-axis sliding rail via at least one X-axis slider, an X-axis servo motor arranged on one end of the X-axis base plate and electrically connected to the PLC controller, an X-axis driving wheel connected to an output shaft of the X-axis servo motor, an X-axis driven wheel arranged on the other end of the X-axis base plate, an X-axis transmission belt surrounding the periphery of the X-axis driving wheel and the X-axis driven wheel, and at least one X-axis sliding rail arranged on the X-axis base plate and extending along the length direction of the X-axis transmission belt, wherein the X-axis base plate is connected to the Y-axis transmission belt via an X-axis clamping block; the Z-axis moving mechanism comprises a Z-axis base plate slidingly arranged on the X-axis sliding rail via at least one Z-axis slider, a Z-axis electric servo cylinder arranged on the Z-axis base plate and electrically connected to the PLC controller, and a Z-axis driving shaft connected between the output shaft of the Z-axis electric servo cylinder and the mounting frame of the feedstock gripping mechanism, wherein the Z-axis base plate is connected to the X-axis transmission belt via a Z-axis clamping block.