CN216152921U - Plastic casing injection mold that production efficiency is high - Google Patents

Abstract

The utility model discloses a plastic shell injection mold with high production efficiency, which adopts the technical scheme that: the die comprises a shell, wherein an annular support is fixedly connected to the inner wall of the bottom of the shell, a rotating rod is connected to the inner wall of the bottom of the shell, the rotating rod is located on the inner side of the annular support, the joint of the rotating rod and the shell is movably connected through a bearing, a bottom plate is fixedly connected to the top of the rotating rod, a die body is arranged at the top of the bottom plate, a heat dissipation mechanism is arranged inside the shell, the heat dissipation mechanism comprises a motor, and the motor is fixedly connected to one side of the shell, so that the die has the beneficial effects that: can make the wind edge blow down also can blow around the mould body, just can accelerate the cooling efficiency to the mould body, the rotation direction of mould body is opposite with the rotation direction of frame, just can make wind blow at the mould body outside evenly, just so can make the cooling time who reduces the mould, just can accelerate the production to plastic casing.

Description

Plastic casing injection mold that production efficiency is high

Technical Field

The utility model relates to the technical field of injection molds, in particular to a plastic shell injection mold with high production efficiency.

Background

In short, the mold is a tool for manufacturing a molded article, and the tool is composed of various parts, and different molds are composed of different parts and mainly pass through the physical shape of a molded material.

The prior art has the following defects: the existing plastic shell injection mold needs to be cooled after injection molding is finished, and the existing cooling method is to wait for the natural cooling of the plastic and has long waiting time, so that the production efficiency of the plastic shell is influenced.

Therefore, the utility model discloses a plastic casing injection mold that production efficiency is high is very necessary.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a plastic shell injection mold with high production efficiency, wherein a gear II is driven to rotate through the rotation of a motor, the gear II drives an outer frame to rotate, the outer frame can drive a gear III to rotate inside an annular gear ring III, so that two reciprocating screw rods can rotate, a bearing seat can move up and down through the rotation of the reciprocating screw rods, the bearing seat drives a spray head to move up and down through the up and down movement, so that wind blows downwards on the upper side and can also blow around a mold body, the cooling efficiency of the mold body can be accelerated, and the problems that the existing plastic shell injection mold needs to be cooled after the injection molding is finished, the existing cooling method needs to wait for the natural cooling of plastics, the waiting time is long, and the production efficiency of the plastic shell is influenced are solved.

In order to achieve the above purpose, the utility model provides the following technical scheme: a plastic shell injection mold with high production efficiency comprises a shell, wherein an annular support is fixedly connected to the inner wall of the bottom of the shell, a rotating rod is connected to the inner wall of the bottom of the shell and is located on the inner side of the annular support, the connecting position of the rotating rod and the shell is movably connected through a bearing, a bottom plate is fixedly connected to the top of the rotating rod, a mold body is arranged on the top of the bottom plate, and a heat dissipation mechanism is arranged inside the shell;

the heat dissipation mechanism comprises a motor, the motor is fixedly connected to one side of the shell, a frame is arranged inside the shell, the die body is located inside the frame, the outer side of the annular support is sleeved with the bottom of the frame, the frame is movably connected with the annular support through a bearing, a connecting plate is fixedly arranged on the outer side of the frame in a sleeved mode, the connecting plate is embedded in the inner wall of the shell and movably connected with the joint of the shell through the bearing, and a triangular interface is arranged at the top of the frame.

Preferably, the inside reciprocal lead screw that all inlays in frame both sides is equipped with, two reciprocal lead screw bottom all extends to the frame bottom outside, two reciprocal lead screw bottom is located the ring carrier outside, two the outside all cover of reciprocal lead screw is equipped with the bearing frame, the bearing frame passes through ball nut deputy with reciprocal lead screw and is connected, two the bearing frame outside all is equipped with spacing subassembly, two the equal fixedly connected with fixed block of bearing frame front end, two the equal fixedly connected with hose in fixed block front side, two the equal fixedly connected with shower nozzle in hose inner, two the equal fixedly connected with copper pipe in hose outer end, two copper outer end runs through linking plate and fixed connection respectively in triangle interface both sides.

Preferably, a first cavity is formed in the bottom of the shell, a first bevel gear is arranged inside the first cavity, a first annular gear ring is fixedly connected to the bottom of the bottom plate, a first rotating shaft is fixedly connected to the top of the first bevel gear, the top end of the first rotating shaft extends to one side of the first annular gear ring, a first gear is fixedly sleeved outside the top end of the first rotating shaft, and the first gear is embedded inside the first annular gear ring and meshed with the first annular gear ring.

Preferably, the outer fixed cover of frame is equipped with annular gear ring two, motor output shaft fixedly connected with pivot two, two one ends of pivot extend to two tops of annular gear ring, two one end external fixed covers of pivot are equipped with gear two, gear two inlays to be established at two inside and with the meshing of annular gear ring two phases of annular gear ring, cavity two has been seted up to the shell bottom, the cavity is two in cavity one side, the inside pivot three that is equipped with of cavity two, three one end of pivot extends to inside the cavity two, three external fixed covers of pivot are equipped with bevel gear two, bevel gear two is located bevel gear one side, bevel gear two meshes with bevel gear one.

Preferably, the equal fixed cover in three outsides of pivot and two outsides of pivot is equipped with the sprocket, the sprocket is located two insides of cavity, two the outside chain that all overlaps of sprocket is equipped with chain, two connect through chain drive between the sprocket, the outside fixed cover of ring carrier is equipped with annular ring gear three, two the outside equal fixed cover in reciprocal lead screw bottom is equipped with gear three, two the gear three all inlays to be established at annular ring gear three insides and with annular ring gear three-phase meshing.

Preferably, two bases of shell bottom fixedly connected with, the shell front side is inlayed and is equipped with the door, the door passes through hinge connection with the shell, triangle interface top fixedly connected with connecting pipe, the connecting pipe top extends to the shell bottom outside, the connecting pipe passes through bearing swing joint with the shell, the connecting pipe top is connected with the air-supply line, the connecting pipe passes through sealed bearing with the air-supply line and is connected, the outside cover of motor is equipped with the protective housing, protective housing fixed connection is in shell one side, a plurality of louvres have all been seted up to protective housing top and bottom.

Preferably, the joint of the first rotating shaft and the shell is movably connected through a bearing, the joint of the second rotating shaft and the shell is movably connected through a bearing, the joint of the third rotating shaft and the shell is movably connected through a bearing, and the joint of the reciprocating screw rod and the outer frame is movably connected through a bearing.

Preferably, the limiting assembly comprises a limiting block, the limiting block is fixedly connected to one side of the bearing seat, a limiting groove is formed in the inner wall of one side of the outer frame, the limiting block is embedded in the limiting groove and matched with the limiting groove, and the cross section of the limiting block is rectangular.

Preferably, the limiting assembly comprises a limiting block, the limiting block is fixedly connected to one side of the bearing seat, a limiting groove is formed in the inner wall of one side of the outer frame, the limiting block is embedded in the limiting groove and matched with the limiting groove, and the cross section of the limiting block is T-shaped.

The utility model has the beneficial effects that:

1. according to the utility model, the gear II is driven to rotate through the rotation of the motor, the gear II drives the outer frame to rotate, the outer frame can drive the gear III to rotate in the annular gear ring III through the rotation of the outer frame, so that the two reciprocating screw rods can rotate, the reciprocating screw rods can rotate to enable the bearing block to move up and down, the bearing block moves up and down to drive the spray head to move up and down, so that the air side can blow downwards and can also blow around the die body, and the cooling efficiency of the die body can be accelerated;

2. according to the utility model, the rotating shaft rotates to drive the bottom plate to rotate, so that the mold body can rotate, and the rotating direction of the mold body is opposite to that of the outer frame, so that wind can be uniformly blown to the outside of the mold body, the cooling time of the mold can be reduced, and the production of the plastic shell can be accelerated.

Drawings

FIG. 1 is a schematic view of the overall structure provided by the present invention;

FIG. 2 is a front view cross-section view provided by the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2 according to the present invention;

FIG. 4 is an enlarged view of the utility model at B of FIG. 2;

FIG. 5 is a perspective view of a bearing seat and a fixing block provided in the present invention;

FIG. 6 is a perspective view of a limiting block according to embodiment 2 of the present invention;

in the figure: the die comprises a shell 1, an annular support 2, a rotating rod 3, a bottom plate 4, a die body 5, a motor 6, an outer frame 7, a connecting plate 8, a triangular connector 9, a reciprocating screw rod 10, a bearing seat 11, a fixing block 12, a hose 13, a nozzle 14, a copper pipe 15, a first bevel gear 16, a first annular gear 17, a first rotating shaft 18, a first gear 19, a second annular gear 20, a second rotating shaft 21, a second gear 22, a third rotating shaft 23, a second bevel gear 24, a sprocket 25, a chain 26, a third annular gear 27, a third gear 28, a base 29, a door 30, a connecting pipe 31, an air inlet pipe 32, a limiting block 33, a radiating hole 34 and a protective shell 35.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Embodiment 1, with reference to fig. 1 to 5, the plastic housing injection mold with high production efficiency provided by the utility model comprises a housing 1, wherein an annular support 2 is fixedly connected to the inner wall of the bottom of the housing 1, a rotating rod 3 is connected to the inner wall of the bottom of the housing 1, the rotating rod 3 is located on the inner side of the annular support 2, the joint of the rotating rod 3 and the housing 1 is movably connected through a bearing, a bottom plate 4 is fixedly connected to the top of the rotating rod 3, a mold body 5 is arranged on the top of the bottom plate 4, and a heat dissipation mechanism is arranged inside the housing 1;

the heat dissipation mechanism includes motor 6, 6 fixed connection of motor are in 1 one side of shell, 1 inside frame 7 that is equipped with of shell, mould body 5 is located inside frame 7, 7 bottom cover of frame are established in the 2 outsides of ring carrier, frame 7 passes through bearing swing joint with ring carrier 2, 7 outside fixed sheathes in of frame are equipped with linking plate 8, linking plate 8 inlays and establishes at 1 inner wall of shell, linking plate 8 passes through bearing swing joint with 1 junction of shell, 7 tops of frame are equipped with triangle interface 9.

Furthermore, reciprocating screw rods 10 are embedded in two sides of the outer frame 7, the bottom ends of the two reciprocating screw rods 10 extend to the outer side of the bottom of the outer frame 7, the bottom ends of the two reciprocating screw rods 10 are positioned outside the annular support 2, bearing seats 11 are sleeved outside the two reciprocating screw rods 10, the bearing seats 11 are connected with the reciprocating screw rods 10 through ball nut pairs, limiting assemblies are arranged outside the two bearing seats 11, fixed blocks 12 are fixedly connected to the front ends of the two bearing seats 11, hoses 13 are fixedly connected to the front sides of the two fixed blocks 12, nozzles 14 are fixedly connected to the inner ends of the two hoses 13, copper pipes 15 are fixedly connected to the outer ends of the two hoses 13, the outer ends of the two copper pipes 15 respectively penetrate through the connecting plates 8 and are fixedly connected to two sides of the triangular connector 9, and air can be blown when the copper pipes 15 and the nozzles 14 are connected to the bearing seats 11 through the hoses 13 and move up and down, can be pulled at will;

further, a first cavity is formed in the bottom of the shell 1, a first bevel gear 16 is arranged in the first cavity, a first annular gear ring 17 is fixedly connected to the bottom of the bottom plate 4, a first rotating shaft 18 is fixedly connected to the top of the first bevel gear 16, the top end of the first rotating shaft 18 extends to one side of the first annular gear ring 17, a first gear 19 is fixedly sleeved outside the top end of the first rotating shaft 18, the first gear 19 is embedded in the first annular gear ring 17 and meshed with the first annular gear ring 17, and the bottom plate 4 can rotate by embedding the first gear 19 in the first annular gear ring 17;

further, an annular gear ring II 20 is fixedly sleeved outside the outer frame 7, an output shaft of the motor 6 is fixedly connected with a rotating shaft II 21, one end of the rotating shaft II 21 extends to the top of the annular gear ring II 20, a gear II 22 is fixedly sleeved outside one end of the rotating shaft II 21, the gear II 22 is embedded inside the annular gear ring II 20 and is meshed with the annular gear ring II 20, a cavity II is formed in the bottom of the housing 1, the cavity II is positioned on one side of the cavity I, a rotating shaft III 23 is arranged inside the cavity II, one end of the rotating shaft III 23 extends to the inside of the cavity II, a bevel gear II 24 is fixedly sleeved outside the rotating shaft III 23, the bevel gear II 24 is positioned on one side of the bevel gear I16, the bevel gear II 24 is meshed with the bevel gear I16, and the outer frame 7 can rotate by embedding the gear II 22 inside the annular gear ring II 20;

furthermore, chain wheels 25 are fixedly sleeved outside the third rotating shaft 23 and the second rotating shaft 21, the chain wheels 25 are located inside the second cavity, chains 26 are sleeved outside the two chain wheels 25, the two chain wheels 25 are in driving connection through the chains 26, an annular gear ring III 27 is fixedly sleeved outside the annular support 2, a gear III 28 is fixedly sleeved outside the bottom end of each of the two reciprocating lead screws 10, the two gear III 28 are embedded inside the annular gear ring III 27 and meshed with the annular gear ring III 27, and the third rotating shaft 23 and the second rotating shaft 21 can rotate simultaneously through the chains 26;

further, two bases 29 are fixedly connected to the bottom of the shell 1, a door 30 is embedded in the front side of the shell 1, the door 30 is connected with the shell 1 through a hinge, a connecting pipe 31 is fixedly connected to the top of the triangular connector 9, the top end of the connecting pipe 31 extends to the outer side of the bottom of the shell 1, the connecting pipe 31 is movably connected with the shell 1 through a bearing, an air inlet pipe 32 is connected to the top of the connecting pipe 31, the connecting pipe 31 is connected with the air inlet pipe 32 through a sealing bearing, a protective shell 35 is sleeved outside the motor 6, the protective shell 35 is fixedly connected to one side of the shell 1, a plurality of heat dissipation holes 34 are formed in the top and the bottom of the protective shell 35, and air can enter the copper pipe 15 through the air inlet pipe 32 and then enter the copper pipe 15 through the connecting pipe 31, and then is blown out from the nozzle 14 through the hose 13;

furthermore, the joint of the first rotating shaft 18 and the shell 1 is movably connected through a bearing, the joint of the second rotating shaft 21 and the shell 1 is movably connected through a bearing, the joint of the third rotating shaft 23 and the shell 1 is movably connected through a bearing, the joint of the reciprocating lead screw 10 and the outer frame 7 is movably connected through a bearing, and the abrasion of the device in use can be reduced through the movable connection of the bearings at multiple positions, so that the service life of the device can be prolonged;

further, the limiting assembly comprises a limiting block 33, the limiting block 33 is fixedly connected to one side of the bearing seat 11, a limiting groove is formed in the inner wall of one side of the outer frame 7, the limiting block 33 is embedded in the limiting groove and matched with the limiting groove, the cross section of the limiting block 33 is rectangular, and the limiting block 33 can enable the bearing seat 11 to be more stable when moving.

The using process of the utility model is as follows: when a user needs to cool the die body 5, air enters from the air inlet pipe 32, the air can enter the pull rod copper pipe 15 through the connecting pipe 31 and the triangular connector 9 and is blown out of the spray head 14 through the hose 13, the motor 6 is started, the motor 6 works to drive the rotating shaft II 21 to rotate, the rotating shaft II 21 rotates to drive the rotating gear II 22 to rotate, the gear II 22 rotates to drive the outer frame 7 to rotate, the outer frame 7 rotates to drive the gear III to rotate inside the annular gear ring III 27 to drive the reciprocating lead screw 10 to rotate, the reciprocating lead screw 10 rotates to drive the bearing seat 11 to move up and down, the bearing seat 11 moves up and down to drive the spray head 14 to move up and down around the die body 5, so that the air can be uniformly blown to the surface of the die body 5, the rotating shaft II 21 rotates to drive one chain wheel 25 to rotate, one chain wheel 25 rotates to drive the other chain wheel 25 to rotate, the other chain wheel 25 rotates to drive the rotating shaft III 23 to rotate, the third rotating shaft 23 rotates to drive the second bevel gear 24 to rotate, the second bevel gear 24 rotates to drive the first bevel gear 16 to rotate, the first bevel gear 16 rotates to drive the first rotating shaft 18 to rotate, the first rotating shaft 18 rotates to drive the first gear 19 to rotate, the first gear 19 rotates to enable the bottom plate 4 to rotate, the bottom plate 4 rotates to enable the mold body 5 to rotate, the rotating direction of the mold body 5 is opposite to the rotating direction of the outer frame 7, wind can be uniformly blown to the outside of the mold body 5, the cooling time of the mold can be shortened, and the production of the plastic shell 1 can be accelerated.

Embodiment 2, referring to fig. 6, the plastic housing injection mold with high production efficiency provided by the utility model is different from embodiment 1 in that the limiting assembly comprises a limiting block 33, the limiting block 33 is fixedly connected to one side of the bearing seat 11, a limiting groove is formed in the inner wall of one side of the outer frame 7, the limiting block 33 is embedded in the limiting groove and matched with the limiting groove, and the cross section of the limiting block 33 is T-shaped.

The using process of the utility model is as follows: when a user needs to cool the die body 5, air enters from the air inlet pipe 32, the air can enter the pull rod copper pipe 15 through the connecting pipe 31 and the triangular connector 9 and is blown out from the spray head 14 through the hose 13, the motor 6 is started, the motor 6 works to drive the rotating shaft II 21 to rotate, the rotating shaft II 21 rotates to drive the gear II 22 to rotate, the gear II 22 rotates to drive the outer frame 7 to rotate, the outer frame 7 rotates to drive the gear III to rotate inside the annular gear ring III 27 to rotate to drive the reciprocating lead screw 10 to rotate, the reciprocating lead screw 10 rotates to drive the bearing seat 11 to move up and down, the bearing seat 11 moves up and down to enable the spray head 14 to move up and down around the die body 5, so that the air can be uniformly blown to the surface of the die body 5, the bearing seat 11 shakes when moving, the limiting block 33 is set to be T-shaped, and the limiting block 33 can be more stable when moving up and down, no sloshing occurs.

The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solution described above. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.

Claims (9)

1. The utility model provides a plastic casing injection mold that production efficiency is high, includes shell (1), its characterized in that: the inner wall of the bottom of the shell (1) is fixedly connected with an annular support (2), the inner wall of the bottom of the shell (1) is connected with a rotating rod (3), the rotating rod (3) is located on the inner side of the annular support (2), the joint of the rotating rod (3) and the shell (1) is movably connected through a bearing, the top of the rotating rod (3) is fixedly connected with a bottom plate (4), the top of the bottom plate (4) is provided with a mold body (5), and a heat dissipation mechanism is arranged inside the shell (1);

heat dissipation mechanism includes motor (6), motor (6) fixed connection is in shell (1) one side, shell (1) inside is equipped with frame (7), mould body (5) are located inside frame (7), frame (7) bottom cover is established in the ring carrier (2) outside, frame (7) and ring carrier (2) pass through bearing swing joint, the fixed cover of frame (7) outside is equipped with linking plate (8), linking plate (8) inlay and establish at shell (1) inner wall, linking plate (8) pass through bearing swing joint with shell (1) junction, frame (7) top is equipped with triangle interface (9).

2. The plastic shell injection mold with high production efficiency as claimed in claim 1, wherein: reciprocating screw rods (10) are embedded in the two sides of the outer frame (7), the bottom ends of the two reciprocating screw rods (10) extend to the outer side of the bottom of the outer frame (7), the bottom ends of the two reciprocating screw rods (10) are positioned on the outer side of the annular support (2), bearing seats (11) are sleeved on the outer portions of the two reciprocating screw rods (10), bearing frame (11) are connected through ball nut pair with reciprocal lead screw (10), two the bearing frame (11) outside all is equipped with spacing subassembly, two the equal fixedly connected with fixed block (12) of bearing frame (11) front end, two the equal fixedly connected with hose (13) of fixed block (12) front side, two equal fixedly connected with shower nozzle (14) in hose (13) inner, two the equal fixedly connected with copper pipe (15) in hose (13) outer end, two copper pipe (15) outer end runs through connection board (8) and fixed connection respectively in triangle interface (9) both sides.

3. The plastic housing injection mold with high production efficiency as set forth in claim 2, wherein: the improved motor rotor is characterized in that a first cavity is formed in the bottom of the shell (1), a first bevel gear (16) is arranged inside the first cavity, a first annular gear ring (17) is fixedly connected to the bottom of the bottom plate (4), a first rotating shaft (18) is fixedly connected to the top of the first bevel gear (16), the top of the first rotating shaft (18) extends to one side of the first annular gear ring (17), a first gear (19) is fixedly sleeved on the outer portion of the top of the first rotating shaft (18), and the first gear (19) is embedded inside the first annular gear ring (17) and meshed with the first annular gear ring (17).

4. The plastic shell injection mold with high production efficiency as claimed in claim 3, wherein: a second annular gear ring (20) is fixedly sleeved outside the outer frame (7), a second rotating shaft (21) is fixedly connected with an output shaft of the motor (6), one end of the second rotating shaft (21) extends to the top of the second annular gear ring (20), a second gear (22) is fixedly sleeved outside one end of the second rotating shaft (21), the second gear (22) is embedded in the second annular gear ring (20) and is meshed with the second annular gear ring (20), the bottom of the shell (1) is provided with a second cavity which is positioned at one side of the first cavity, a third rotating shaft (23) is arranged in the second cavity, one end of the third rotating shaft (23) extends into the second cavity, the outer part of the rotating shaft III (23) is fixedly sleeved with a bevel gear II (24), the bevel gear II (24) is located on one side of the bevel gear I (16), and the bevel gear II (24) is meshed with the bevel gear I (16).

5. The plastic shell injection mold with high production efficiency as set forth in claim 4, wherein: three (23) outsides of pivot and the equal fixed cover in pivot two (21) outside are equipped with sprocket (25), sprocket (25) are located cavity two insidely, two sprocket (25) outside all overlaps and is equipped with chain (26), two connect through chain (26) drive between sprocket (25), the fixed cover in ring carrier (2) outside is equipped with three (27), two the outside fixed cover in reciprocal lead screw (10) bottom is equipped with three (28), two the gear three (28) all inlay establish in three (27) insides of ring gear and with three (27) meshes mutually of ring gear.

6. The plastic shell injection mold with high production efficiency as claimed in claim 1, wherein: two bases (29) of shell (1) bottom fixedly connected with, shell (1) front side inlays and is equipped with door (30), door (30) pass through hinge connection with shell (1), triangle interface (9) top fixedly connected with connecting pipe (31), connecting pipe (31) top extends to the shell (1) bottom outside, connecting pipe (31) pass through bearing swing joint with shell (1), connecting pipe (31) top is connected with air-supply line (32), connecting pipe (31) are connected through sealed bearing with air-supply line (32), motor (6) outside cover is equipped with protective housing (35), protective housing (35) fixed connection is in shell (1) one side, a plurality of louvre (34) have all been seted up with the bottom at protective housing (35) top.

7. The plastic shell injection mold with high production efficiency as set forth in claim 4, wherein: the connecting part of the first rotating shaft (18) and the shell (1) is movably connected through a bearing, the connecting part of the second rotating shaft (21) and the shell (1) is movably connected through a bearing, the connecting part of the third rotating shaft (23) and the shell (1) is movably connected through a bearing, and the connecting part of the reciprocating lead screw (10) and the outer frame (7) is movably connected through a bearing.

8. The plastic housing injection mold with high production efficiency as set forth in claim 2, wherein: the limiting assembly comprises a limiting block (33), the limiting block (33) is fixedly connected to one side of the bearing seat (11), a limiting groove is formed in the inner wall of one side of the outer frame (7), the limiting block (33) is embedded in the limiting groove and matched with the limiting groove, and the cross section of the limiting block (33) is rectangular.

9. The plastic housing injection mold with high production efficiency as set forth in claim 2, wherein: the limiting assembly comprises a limiting block (33), the limiting block (33) is fixedly connected to one side of the bearing seat (11), a limiting groove is formed in the inner wall of one side of the outer frame (7), the limiting block (33) is embedded in the limiting groove and matched with the limiting groove, and the cross section of the limiting block (33) is T-shaped.

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