CN210116132U

CN210116132U - Loose joint core-pulling mechanism of U-shaped bent pipe injection mold

Info

Publication number: CN210116132U
Application number: CN201920450600.6U
Authority: CN
Inventors: 鲍朝谋
Original assignee: Zhejiang Chuangyuan Mould Technology Co Ltd
Current assignee: Zhejiang Chuangyuan Mould Technology Co Ltd
Priority date: 2019-04-04
Filing date: 2019-04-04
Publication date: 2020-02-28
Anticipated expiration: 2029-04-04

Abstract

A loose joint core pulling mechanism of a U-shaped bent pipe injection mold comprises an upper compound plate, a lower compound plate, a fixed mold insert, a mold foot, an upper ejector plate, a lower ejector plate and an ejector pin, wherein the fixed mold plate is arranged below the upper compound plate, the movable mold insert, a left slide seat and a right slide seat are arranged on the mold foot, the left slide seat is provided with a left oil cylinder, a left outer slide block and a left inner slide block, the right slide seat is provided with a right oil cylinder, a right outer slide block and a right inner slide block, a straight core pulling block is arranged between the left outer slide block and the left inner slide block, a through hole is formed in the straight core pulling block, the straight core pulling block is connected with a bent core pulling rod, a pull rod mounting groove and a long through hole are formed in the left outer slide block, a pull rod is arranged in the pull rod mounting groove, a transverse through hole is formed in the pull rod, two ends of the through rod penetrate through, And a second connecting sheet is arranged at one end of the bent core pulling rod, and a mold core pulling rod is arranged between the upper compound plate and the fixed mold insert.

Description

Loose joint core-pulling mechanism of U-shaped bent pipe injection mold

Technical Field

The utility model relates to a U type return bend injection mold especially relates to U type return bend injection mold's loose mechanism of loosing core that connects.

Background

The injection mold of the prior art generally firstly pulls out the straight core of the straight pipe part in the U-shaped elbow through the oil cylinder after the U-shaped elbow is subjected to injection molding, and then the straight core is pulled out through the matching of the rack and the gear or the bending core pulling is driven by the servo motor to rotate and be pulled out.

Disclosure of Invention

The utility model aims at overcoming the shortcoming that prior art exists, providing a simple structure, reducing the mould volume, reducing mould manufacturing cost's U type return bend injection mold's loose mechanism of loosing core that connects.

The utility model discloses U type return bend injection mold's loose technical scheme who connects mechanism of loosing core is: the injection molding device comprises an upper compound plate and a lower compound plate, wherein a fixed template is arranged below the upper compound plate, a fixed mold insert is arranged below the fixed template, a through hole is formed in the lower compound plate, mold feet are arranged on the lower compound plate, an upper thimble plate, a lower thimble plate and a thimble are arranged on the lower compound plate between the mold feet, a thimble rod of an injection machine penetrates through the through hole to be contacted with the lower thimble plate, a movable template is arranged on the mold feet, a movable mold insert, a left sliding seat and a right sliding seat are arranged on the movable template, a left oil cylinder is arranged on one side of the left sliding seat, a left outer sliding seat is arranged on the left sliding seat, a piston rod of the left oil cylinder is connected with a left outer sliding block, a right oil cylinder is arranged on one side of the right sliding seat, a right outer sliding block is arranged on the right sliding seat, a piston rod of the right oil cylinder is connected with a right outer sliding block, the right outer sliding block is connected with a right inner sliding block, an injection molding U-shaped, the middle side wall of the U-shaped elbow is provided with a side connecting pipe, a straight core pulling block is arranged between the left outer sliding block and the left inner sliding block, the straight core pulling block penetrates through the left inner sliding block to be matched with the inner wall of a straight pipe of the U-shaped elbow, a through hole is formed in the straight core pulling block, the head of the straight core pulling block is connected with a bent core pulling rod, the bent core pulling rod is matched with the inner wall of one half of the elbow of the U-shaped elbow, a pull rod mounting groove and a long through hole are formed in the left outer sliding block, the pull rod is arranged in the pull rod mounting groove and communicated with the long through hole, a transverse through hole is formed in the pull rod and corresponds to the long through hole, a penetrating rod is inserted into the transverse through hole and the long through hole, the penetrating rod is in sliding fit with the long through hole, the two ends of the penetrating rod penetrate through the left outer sliding block to be connected with a limiting reset, the adjustable joint is provided with a left connecting groove and a right connecting groove, the first connecting plate is inserted into the left connecting groove, the adjustable joint is rotatably connected with the first connecting plate through a first pin, one end of the curved core pulling rod is provided with a second connecting plate, the second connecting plate is inserted into the right connecting groove, the adjustable joint is rotatably connected with the second connecting plate through a second pin, a fixed mold core pulling rod is arranged between the upper compound plate and the fixed mold insert, and the fixed mold core pulling rod penetrates through the fixed mold insert and is matched with the side pipe inner wall of the side wall of the U-shaped bent pipe.

The utility model discloses a loose joint core-pulling mechanism of a U-shaped bent pipe injection mold, after the U-shaped bent pipe is injection molded, a lower compound plate drives an upper thimble plate, a lower thimble plate, a thimble and a mold foot to move backwards, the mold foot drives a movable mold plate to move backwards, the movable mold plate drives a movable mold insert, a left slide seat, a left oil cylinder, a left outer slide block, a left inner slide block, a right slide seat, a right oil cylinder, a right outer slide block, a right inner slide block and the injection molded U-shaped bent pipe to move backwards together, and the upper compound plate, a fixed mold plate, the fixed mold insert and a fixed mold core-pulling rod keep still, so that the mold is opened from between the fixed mold plate and the movable mold plate, and the fixed mold core-pulling rod firstly pulls out a side pipe of the side wall of the U-shaped bent pipe, after the mold is opened, the left oil cylinder and the right oil cylinder work simultaneously, a piston rod of the right oil cylinder drives the right outer slide block to move outwards, the right outer slide, the left outer slide block drives the left inner slide block to move outwards, the left inner slide block drives the straight core pulling block to be pulled out of the inner wall of the straight pipe at the opening part of the U-shaped bent pipe, while the left outer slide block moves outwards, a strip through hole in the left outer slide block is in sliding fit with the through rod, the through rod is kept still under the drive of the limiting reset mechanism, the pull rod connected with the through rod is kept still, one side of the pull rod is provided with a small rod, a movable joint and a bent core pulling rod connected with the small rod are kept still until the tail end of the strip through hole of the left outer slide block is contacted with the through rod, at the moment, the straight core pulling block is pulled out of the inner wall of the straight pipe at the opening part of the U-shaped bent pipe, the left outer slide block drives the through rod to move outwards together with the through rod, the through rod drives the limiting reset mechanism to move, the through rod drives the pull rod to move outwards, the small rod on the pull rod drives the movable joint to move, because the small rod, the loose joint and the bent core-pulling rod are in rotary connection, when the bent core-pulling rod is pulled out, the bent core-pulling rod gradually rotates along the U-shaped bent pipe, the loose joint also rotates to match the bent core-pulling rod to pull out the core until the bent core-pulling rod completely pulls out the U-shaped bent pipe, and finally the upper ejector pin plate and the lower ejector pin plate drive the ejector pins to eject out and demold the U-shaped bent pipe after core pulling is completed. This scheme U type return bend injection mold's loose core mechanism that connects realizes delaying to take out the curved core bar of loosing through the sliding fit of rectangular through hole with the pole that runs through, takes out the curved core bar of loosing again after taking out straight core bar, and the curved core bar of loosing drives rotatory core through the little pole swivelling joint of loose joint and pull rod, simple structure, and it is convenient to take out, need not mechanisms such as motor or rack, gear and drives rotatory core of loosing, reduces the mould volume, reduces mould manufacturing cost.

The utility model discloses U type return bend injection mold's loose mechanism of loosing core that connects, spacing canceling release mechanical system include fixed block and spacing connecting block, connect the guide arm between fixed block and the left slide, the guide arm passes spacing connecting block, is located fixed block and spacing connecting block at the guide arm outer wall and sets up the spring, one end and the fixed block of spring contact, another end of spring contacts with spacing connecting block, the system has the connecting hole in spacing connecting block, it inserts in the connecting hole to run through the pole. When the contact of the end of a strip through hole of the left outer slider and the through rod, the left outer slider drives the through rod to move outwards, the through rod drives the limit connecting block to move outwards along the guide rod, the limit connecting block pulls the spring after moving, the spring is in an elastic opening state, when the die is reset, the left oil cylinder drives the left outer slider and the left inner slider to reset, the left outer slider and the left inner slider drive the straight loose core block to reset, the spring pulls the limit connecting block to reset under the action of restoring force, the limit connecting block drives the through rod to reset, the through rod drives the pull rod, the small rod resets, and the small rod drives the bent loose core rod to reset through the adjustable joint.

Drawings

FIG. 1 is a schematic structural diagram of a loose joint core-pulling mechanism of an injection mold for U-shaped bent pipes;

FIG. 2 is a schematic view of a movable mold side of the injection mold for a U-bend pipe;

FIG. 3 is a perspective view of the left outer slide block, the left inner slide block and the penetrating rod in a matching state;

FIG. 4 is a schematic structural diagram of the left outer slide block, the left inner slide block, the straight core-pulling block, the curved core-pulling rod, the movable joint, the pull rod and the penetrating rod in a matching state;

FIG. 5 is a perspective view of the left inner slide;

FIG. 6 is a schematic structural view of the left inner slide;

FIG. 7 is a perspective view showing the fitting state of the curved draw-bar stem, the flexible joint, the pull rod and the through rod;

FIG. 8 is a perspective view of the loose joint;

FIG. 9 is a schematic perspective view of a U-bend;

fig. 10 is a three-dimensional schematic view of the left slide seat, the left outer slide block, the through rod, the limiting connecting block, the fixing block and the guide rod in a matching state.

Detailed Description

The utility model relates to a loose joint core-pulling mechanism of a U-shaped bent pipe injection mold, as shown in figures 1-10, comprising an upper compound plate 1 and a lower compound plate 2, a fixed mold plate 3 is arranged under the upper compound plate, a fixed mold insert 4 is arranged under the fixed mold plate, a perforation is arranged in the lower compound plate, mold feet 6 are arranged on the lower compound plate, an upper thimble plate 7, a lower thimble plate 8 and thimbles 9 are arranged on the lower compound plate between the mold feet, the thimble of the injection machine passes through the perforation 5 to contact with the lower thimble plate, a movable mold plate 10 is arranged on the mold feet 6, a movable mold 11, a left slide seat 12 and a right slide seat 13 are arranged on the movable mold plate, a left oil cylinder 14 is arranged on one side of the left slide seat, a left outer slide seat 15 is arranged on the left slide seat, a piston rod of the left oil cylinder is connected with the left outer slide seat, the left outer slide seat is connected with the left inner slide seat 16, a right oil cylinder 17 is arranged on one side of the right, the right outer slide block is connected with a right inner slide block 19, an injection-molded U-shaped bent pipe 20 is arranged between the right inner slide block 19, the left inner slide block 16, the fixed die insert 4 and the movable die insert 11, the two ends of the U-shaped bent pipe are provided with straight pipes 21 at the mouth parts, the middle side wall of the U-shaped bent pipe is provided with a side connecting pipe 22, a straight core pulling block 23 is arranged between the left outer slide block 15 and the left inner slide block 16, the straight core pulling block passes through the left inner slide block and is matched with the inner wall of the straight pipe 21 of the U-shaped bent pipe 20, a through hole 24 is arranged in the straight core pulling block, the head part of the straight core pulling block is connected with a curved core pulling rod 25, the curved core pulling rod is matched with the inner wall of one half of the bent pipes of the U-shaped bent pipe, a pull rod mounting groove 26 and a long through hole 27 are arranged in the left outer slide block 15, the pull rod mounting groove is communicated with, the through rod is in sliding fit with the long through hole, two ends of the through rod penetrate through the left outer slide block 15 to be connected with the limiting reset mechanism, one side of the pull rod 28 is provided with a small rod 31, the head of the small rod is provided with a first connecting piece 32, the small rod penetrates through a through hole 24 of the straight core-pulling block 23 to be connected with a movable joint 33, the movable joint is provided with a left connecting groove 34 and a right connecting groove 35, the first connecting piece 32 is inserted into the left connecting groove, the movable joint is rotatably connected with the first connecting piece through a first pin 36, one end of the bent core-pulling rod 25 is provided with a second connecting piece 37, the second connecting piece is inserted into the right connecting groove 35, the movable joint is rotatably connected with the second connecting piece through a second pin 38, a fixed core rod 39 is arranged between the upper compound plate 1 and the fixed core plate 4, and the fixed core rod penetrates. After the U-shaped bent pipe 20 is injection molded, the lower compound plate 2 drives the upper thimble plate 7, the lower thimble plate 8, the thimble 9 and the mold foot 6 to move backwards, the mold foot drives the movable mold plate 10 to move backwards, the movable mold plate drives the movable mold insert 11, the left slide seat 12, the left oil cylinder 14, the left outer slide block 15, the left inner slide block 16, the right slide seat 13, the right oil cylinder 17, the right outer slide block 18, the right inner slide block 19 and the injection molded U-shaped bent pipe 20 to move backwards together, the upper compound plate 1, the fixed mold plate 3, the fixed mold insert 4 and the fixed mold core-pulling rod 39 keep still, so that the mold is opened from between the fixed mold plate 3 and the movable mold plate 10, the fixed mold core-pulling rod 39 firstly pulls out the side pipe 22 on the side wall of the U-shaped bent pipe 20, after the mold is opened, the left and

right oil cylinders

14 and 17 work simultaneously, the piston rod of the right oil cylinder drives the right outer slide block 18 to move outwards, the, meanwhile, a piston rod of the left oil cylinder 14 drives the left outer slide block 15 to move outwards, the left outer slide block drives the left inner slide block 16 to move outwards, the left inner slide block firstly drives the straight core pulling block 23 to pull out the inner wall of the straight pipe 21 at the opening part of the U-shaped bent pipe 20, while the left outer slide block 15 moves outwards, the long through hole 27 in the left outer slide block is in sliding fit with the through rod 30, so that the through rod is kept still under the driving of the limiting and resetting mechanism, the pull rod 28 connected to the through rod 30 is kept still, one side of the pull rod is provided with a small rod 31, the loose joint 33 connected with the small rod and the bent core pulling rod 25 are kept still until the tail end of the long through hole 27 of the left outer slide block 15 is contacted with the through rod 30, at the moment, the straight core pulling block 23 is pulled out of the inner wall of the straight pipe 21 at the opening part of the U-shaped bent pipe 20, the left outer slide block 15 drives the through rod 30 to move outwards together, the small rod 31 on the pull rod drives the loose joint 33 to move outwards through the first pin 36, the loose joint drives the bent core-pulling rod 25 to move outwards through the second pin 38, and due to the fact that the small rod 31, the loose joint 33 and the bent core-pulling rod 25 are in rotary connection, when the bent core-pulling rod is pulled outwards, the bent core-pulling rod 25 rotates gradually along the U-shaped bent pipe 20, the loose joint 33 rotates to match with the bent core-pulling rod to pull out the core until the bent core-pulling rod is completely pulled out of the U-shaped bent pipe, and finally the upper ejector pin plate 7 and the lower ejector pin plate 8 drive the ejector pins 9 to eject out and demold the U-shaped bent pipe 20 which completes core pulling. The loose connection core-pulling mechanism of the U-shaped elbow injection mold realizes delayed pulling of the bent core-pulling rod 25 through the sliding fit of the strip-shaped through hole 27 and the through rod 30, the bent core-pulling rod 25 is pulled out after the straight core-pulling block 23 is pulled out, and the bent core-pulling rod is rotationally connected with the small rod 31 of the pull rod 28 through the loose joint 33. The limiting reset mechanism comprises a fixed block 40 and a limiting connecting block 41, a guide rod 42 is connected between the fixed block and the left sliding seat 12, the guide rod penetrates through the limiting connecting block, a spring 43 is arranged on the outer wall of the guide rod and positioned on the fixed block 40 and the limiting connecting block 41, one end of the spring is in contact with the fixed block, the other end of the spring is in contact with the limiting connecting block, a connecting hole is formed in the limiting connecting block, and the penetrating rod 30 is inserted into the connecting hole. When the end of the strip through hole 27 of the left outer slider 15 contacts with the through rod 30, the left outer slider 15 drives the through rod 30 to move outwards, the through rod drives the limit connecting block 41 to move outwards along the guide rod 42, the limit connecting block pulls the spring 43 after moving, so that the spring is in an elastic opening state, when the mold is reset, the left oil cylinder 14 drives the left outer slider 15 and the left inner slider 16 to reset, the left outer slider and the left inner slider drive the straight core-pulling block 23 to reset, the spring 43 pulls the limit connecting block 41 to reset under the action of restoring force, the limit connecting block drives the through rod 30 to reset, the through rod drives the pull rod 28 and the small rod 31 to reset, and the small rod drives the bent core-pulling rod 25 to reset through the flexible joint 33.

Claims

A loose joint core pulling mechanism of a U-shaped bent pipe injection mold comprises an upper compound plate (1) and a lower compound plate (2), wherein a fixed mold plate (3) is arranged below the upper compound plate, a fixed mold insert (4) is arranged below the fixed mold plate, a through hole is formed in the lower compound plate, mold feet (6) are arranged on the lower compound plate, an upper ejector pin plate (7), a lower ejector pin plate (8) and ejector pins (9) are arranged on the lower compound plate between the mold feet, an ejector pin of an injection machine penetrates through the through hole (5) to be contacted with the lower ejector pin plate, a movable mold plate (10) is arranged on the mold feet (6), a movable mold insert (11), a left sliding seat (12) and a right sliding seat (13) are arranged on the movable mold plate, a left oil cylinder (14) is arranged on one side of the left sliding seat, a left outer sliding block (15) is arranged on the left sliding seat, a piston rod of the left oil cylinder is connected with the left outer sliding block, the left, set up right outer slider (18) on the slide of the right side, the piston rod of right side hydro-cylinder is connected with right outer slider, and right outer slider connects right inner slider (19), and there is injection moulding's U type return bend (20) between right inner slider (19), left inner slider (16), cover half insert (4) and movable mould insert (11), and the both ends of U type return bend are that the oral area is straight tube (21), and the middle part lateral wall system of U type return bend has side takeover (22), its characterized in that: a straight core-pulling block (23) is arranged between the left outer sliding block (15) and the left inner sliding block (16), the straight core-pulling block passes through the left inner sliding block and is matched with the inner wall of a straight pipe (21) of a U-shaped bent pipe (20), a through hole (24) is formed in the straight core-pulling block, the head of the straight core-pulling block is connected with a bent core-pulling rod (25), the bent core-pulling rod is matched with the inner wall of one half bent pipe of the U-shaped bent pipe, a pull rod mounting groove (26) and a long through hole (27) are formed in the left outer sliding block (15), the pull rod mounting groove is communicated with the long through hole, a pull rod (28) is arranged in the pull rod mounting groove, a transverse through hole (29) is formed in the pull rod, the transverse through hole corresponds to the long through hole (27), a penetrating rod (30) is inserted into the transverse through hole and the long, a small rod (31) is arranged on one side of a pull rod (28), a first connecting plate (32) is arranged at the head of the small rod, the small rod penetrates through a through hole (24) of a straight core-pulling block (23) to be connected with a movable joint (33), the movable joint is provided with a left connecting groove (34) and a right connecting groove (35), the first connecting plate (32) is inserted into the left connecting groove, the movable joint is rotatably connected with the first connecting plate through a first pin (36), a second connecting plate (37) is arranged at one end of a bent core-pulling rod (25), the second connecting plate is inserted into the right connecting groove (35), the movable joint is rotatably connected with the second connecting plate through a second pin (38), a fixed core-pulling rod (39) is arranged between an upper compound plate (1) and a fixed core-pulling rod (4), and the fixed core-pulling rod penetrates through the fixed core-pulling rod (4) to be matched.
2. The loose joint core-pulling mechanism of the injection mold for the U-shaped elbow according to claim 1, characterized in that: spacing canceling release mechanical system include fixed block (40) and spacing connecting block (41), be connected guide arm (42) between fixed block and left slide (12), the guide arm passes spacing connecting block, be located fixed block (40) and spacing connecting block (41) at the guide arm outer wall and set up spring (43), one end of spring contacts with the fixed block, another end of spring contacts with spacing connecting block, the system has the connecting hole in spacing connecting block, it inserts in the connecting hole to run through pole (30).