CN110406051B

CN110406051B - Injection mold capable of discharging air after mold closing

Info

Publication number: CN110406051B
Application number: CN201910732731.8A
Authority: CN
Inventors: 张宝昆
Original assignee: Zhaoqing City High New District Qinaghong Plastic Mould Co ltd
Current assignee: Zhaoqing City High New District Qinaghong Plastic Mould Co ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2021-06-29
Anticipated expiration: 2039-08-09
Also published as: CN110406051A

Abstract

The invention discloses an injection mold capable of exhausting air after mold closing, which structurally comprises a top seat, an upper mold, an exhaust mechanism, a lower mold, a connecting block and a base, wherein the top of the upper mold is connected with the top seat, and the upper mold is connected with the lower mold through the exhaust mechanism, and compared with the prior art, the injection mold has the beneficial effects that: based on lenz's law, can prevent to take place the rigidity collision when the compound die, slowly fall can in time discharge most air in the die cavity, after the compound die, based on magnetism principle of attracting mutually, use magnetic attraction as the power supply, utilize the clockwork spring characteristic, can make the multiunit bleed simultaneously and organize and bleed in step, the efficiency of bleeding has been improved, utilize planetary gear set triple revolution, increase the air extraction, make the air in the die cavity to arrange entirely, avoid air and melting to mix, prevent the production of bubble, make the mechanical strength of moulding, weight, the aesthetic property is not influenced, the quality of moulding can obtain the assurance, the gas of taking out can be again to moulding the cooling after the die sinking, be convenient for mould the drawing of patterns.

Description

Injection mold capable of discharging air after mold closing

Technical Field

The invention relates to the technical field of molds, in particular to an injection mold capable of exhausting air after mold closing.

Background

Because of the advantages of light weight, good toughness, easy molding, low cost and the like, transparent plastics are increasingly used to replace glass in modern industry and daily products, and many products are obtained by injecting heated and melted plastics into a mold cavity of an injection mold from an injection molding machine at high pressure, and cooling and solidifying the plastics.

After the upper die and the lower die are assembled, because the dies are tightly matched, the air in the dies is difficult to discharge after the dies are assembled, the air and the injected melt are mixed together to form bubbles, the mechanical strength of the plastic part can be weakened by the bubbles, the weight of the plastic part can be reduced, the quality of the plastic part can not be ensured, and the bubbles generated by the transparent plastic part are obvious, so that the attractiveness of the transparent plastic part is influenced.

Disclosure of Invention

The invention mainly aims to overcome the defects of the prior art and provide an injection mold capable of exhausting air after mold closing.

The invention is realized by adopting the following technical scheme: an injection mold capable of discharging air after mold closing structurally comprises a top seat, an upper mold, an exhaust mechanism, a lower mold, connecting blocks and a base, wherein the top of the upper mold is connected with the top seat, the upper mold is connected with the lower mold through the exhaust mechanism, and two sides of the bottom surface of the lower mold are connected with the base through the two parallel connecting blocks;

the exhaust mechanism comprises a positioning group, a traction rope, an exhaust disc, an air guide disc and a rotating group, the air guide disc which is of a concentric circle structure is communicated with the exhaust disc, the lower portion of the exhaust disc is in transmission connection with the rotating group, the four corners of the rotating group are connected with the positioning group through the traction rope, the positioning group connects an upper die with a lower die together, the air guide disc is communicated with an exhaust groove of the lower die, and the exhaust disc is installed at the center of the bottom of the lower die.

Further optimize, the location group is including guide bar, guide cylinder, limiting plate, movable block, through-hole, the through-hole of circular structure is seted up at the bottom surface center of guide cylinder, clearance fit has the movable block in the guide cylinder, be equipped with the limiting plate on the movable block, the outer wall of limiting plate and the inner wall fixed connection of guide cylinder, be equipped with on the limiting plate with guide cylinder matched with guide bar, the guide bar is connected perpendicularly with the bottom surface angle position of last mould, the guide cylinder embedding is on the angle position of lower mould, the bottom surface center of movable block is connected with the one end of haulage rope, and the other end of haulage rope passes the through-hole and connects in rotatory group.

Further optimize, the guide bar is including the body of rod, permanent magnet, collets, the bottom surface of the body of rod excessively cooperates there is the collets, the collets has been inlayed to the collets, the permanent magnet is just relative with the movable block, the body of rod runs through in the guide cylinder.

Further optimize, the movable block is including iron plate, insulating seat, round hole, the insulating seat embeds there is the iron plate, the round hole has been seted up to the insulating seat top surface, the iron plate is just relative with the permanent magnet, the bottom surface center of insulating seat is connected in the haulage rope.

Further optimize, the dish of bleeding is including sun gear, center pin, spacing dish, clockwork spring, the group of bleeding, deflector, the central point of spacing dish puts and installs the center pin that adopts clearance fit with it, the bottom of center pin excessively cooperates and has the sun gear, spacing dish embeds there is the group of bleeding, the group of bleeding is provided with eight groups and is laid for the circle array more than, the group of bleeding all with clockwork spring clearance fit, the one end and the deflector of clockwork spring are connected, and the other end is connected in the center pin, locate spacing dish in the deflector, sun gear drive is connected in rotatory group, spacing dish top surface is equipped with the air guide dish that is linked together with the group of bleeding.

Further optimize, the group of bleeding is including arc piece, piston rod, inlet head, urceolus, arc passageway, the arc passageway has been seted up on the arc piece, the arc piece is connected with the one end of piston rod is perpendicular, the piston rod runs through in the urceolus, the one end that the arc piece was kept away from to the urceolus is provided with the inlet head, the inlet head communicates in the air guide plate, urceolus and the interior terminal surface fixed connection of spacing dish, the clockwork spring runs through in the arc passageway.

Further optimize, the air guide plate is including disk body, closed tube, the cover of bleeding, the central point of disk body puts and installs the cover of bleeding, it has the closed tube all to communicate on eight wait and above branch positions of cover of bleeding, the closed tube is connected with the disk body, the closed tube is kept away from the one end of the cover of bleeding and is communicated in the head of admitting air, the disk body is fixed in the top surface of spacing dish.

Further optimize, rotatory group is including first flap, planetary gear, external gear, pivot, second flap, first flap constructs the shaping with the second flap and both central points put and link together through the torsional spring axle, the top surface of first flap is fixed with the external gear that is concentric point with it, the transmission is connected with planetary gear in the external gear, planetary gear is provided with threely and equal interference fit has the pivot, and is three planetary gear all meshes with central gear mutually, central gear and external gear are concentric gear, the two ends of first flap, second flap all are connected through haulage rope and insulating seat end heart.

Further preferably, the guide cylinder is made of aluminum or copper materials.

Further optimizing, the urceolus is bilayer structure and sets up to have the ice crystal in inside.

Advantageous effects

The upper die and the lower die are matched under the guiding action of the guide rod and the guide cylinder, when the guide rod retracts into the guide cylinder until the guide rod is limited by the limiting plate, the matching is successful, at the moment, the permanent magnet generates suction to the iron block, so that the insulating seat rises until the insulating seat is limited by the limiting plate, in the process, the movable block generates tension to the first hinge plate and the second hinge plate through the traction rope, the first hinge plate and the second hinge plate rotate reversely and centering on the torsion spring shafts connected with the first hinge plate and the second hinge plate, the first hinge central shaft chain plate drives the outer gear to rotate, the central gear is linked through the planetary gear, the central shaft simultaneously rotates and releases the tension to the spring, the spring is stressed and generates external thrust to the arc-shaped block, so that the piston rod is pulled outwards to be exhausted, air in the die cavity enters the outer cylinder through the air exhaust groove, the exhaust cover, the communicating pipe and the air inlet head, cool down through the ice crystal, when the die sinking, when the limiting plate is kept away from to the guide bar, the permanent magnet disappears to the magnetic attraction of iron plate, the movable block is because the dead weight whereabouts, the pulling force to the haulage rope has been released simultaneously, thereby first flap, the second flap atress reduces gradually, hold power with the torsional spring axle when the compound die and reset for elasticity, thereby make the external gear drive sun gear antiport through planetary gear, thereby the center pin is with the spiral spring internal-winding, make the piston rod impel in to the urceolus and inflate, through the head of admitting air, the communicating pipe, the suction hood, the air discharge duct gives off gas to moulding, further cool off moulding, be convenient for mould a drawing of patterns.

Compared with the prior art, the invention has the beneficial effects that: the invention combines the positioning set, the traction rope, the air exhaust disc, the air guide disc and the rotating set, based on Lenz law, when closing the mold, the upper mold falls slowly to prevent rigid collision when closing the mold, and falls slowly to discharge most of air in the mold cavity in time, after closing the mold, based on the magnetic attraction principle, the invention uses the magnetic attraction as a power source, uses the characteristics of a spiral spring to simultaneously and synchronously exhaust a plurality of air exhaust sets, improves the air exhaust efficiency, uses the three times of revolution of a planetary gear set to increase the air exhaust stroke to increase the air exhaust amount, enables the air in the mold cavity to be completely discharged, avoids the air and the injected melt mixing, prevents the generation of bubbles, enables the mechanical strength, the weight and the aesthetic property of the plastic piece not to be influenced, ensures the quality of the plastic piece, can cool the exhausted air, further cools the plastic piece after opening the mold, is convenient for demoulding of the plastic part.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural view of an injection mold according to the present invention, in which air is discharged after mold clamping.

Fig. 2 is a schematic top view of the exhaust mechanism of the present invention.

Fig. 3 is a schematic bottom view of the exhaust mechanism of the present invention in a first operating state.

Fig. 4 is a schematic bottom view of the exhaust mechanism of the present invention in a second operating state.

Fig. 5 is a schematic structural diagram of a first operating state of the positioning set of the present invention.

Fig. 6 is a schematic structural diagram of a second working state of the positioning set of the present invention.

Fig. 7 is a schematic bottom view of the guide bar of the present invention.

Fig. 8 is a schematic top view of the movable block of the present invention.

Fig. 9 is a schematic cross-sectional view of the pumping disk according to the present invention in a first operating state.

FIG. 10 is a schematic cross-sectional view of a second operation state of the pumping disk of the present invention.

FIG. 11 is a schematic cross-sectional view of the pumping group of the present invention.

Fig. 12 is a schematic cross-sectional view of the air guide plate of the present invention.

Fig. 13 is a schematic top view of the rotating group according to the present invention in a first operating state.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

the device comprises a top seat-1, an upper die-2, an exhaust mechanism-3, a lower die-4, a connecting block-5, a base-6, a positioning group-a, a traction rope-b, an air suction disc-c, an air guide disc-d, a rotating group-e, a guide rod-a 1, a guide cylinder-a 2, a limit plate-a 3, a movable block-a 4, a through hole-a 5, a rod body-a 11, a permanent magnet-a 12, an insulating block-a 13, an iron block-a 41, an insulating seat-a 42, a round hole-a 43, a central gear-c 1, a central shaft-c 2, a limit disc-c 3, a spring-c 4, an air suction group-c 5, a guide plate-c 6, an arc block-c 51, a piston rod-c 52, an air inlet head-c 53, an outer cylinder-c 54, an arc channel-c 55, a, The air suction device comprises a disc body-d 1, a communicating pipe-d 2, an air suction hood-d 3, a first hinge plate-e 1, a planetary gear-e 2, an external gear-e 3, a rotating shaft-e 4 and a second hinge plate-e 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-13, the present invention provides a technical solution of an injection mold for exhausting air after mold closing: the structure of the device comprises a top seat 1, an upper die 2, an exhaust mechanism 3, a lower die 4, connecting blocks 5 and a base 6, wherein the top of the upper die 2 is connected with the top seat 1, the upper die 2 is connected with the lower die 4 through the exhaust mechanism 3, and two sides of the bottom surface of the lower die 4 are connected with the base 6 through the two parallel connecting blocks 5;

the exhaust mechanism 3 comprises a positioning group a, a traction rope b, an exhaust disc c, an air guide disc d and a rotating group e, the exhaust disc c is communicated with the air guide disc d which is of a concentric circle structure, the lower portion of the exhaust disc is in transmission connection with the rotating group e, four corners of the rotating group e are connected with the positioning group a through the traction rope b, the positioning group a connects the upper die 2 with the lower die 4 together, the air guide disc d is communicated with an exhaust groove of the lower die 4, and the exhaust disc c is installed at the center of the bottom of the lower die 4.

The positioning group a comprises a guide rod a1, a guide cylinder a2, a limit plate a3, a movable block a4 and a through hole a5, the center of the bottom surface of the guide cylinder a2 is provided with a through hole a5 with a circular structure, a movable block a4 is in clearance fit in the guide cylinder a2, a limiting plate a3 is arranged on the movable block a4, the outer wall of the limiting plate a3 is fixedly connected with the inner wall of the guide cylinder a2, the limit plate a3 is provided with a guide rod a1 matched with the guide cylinder a2, the guide rod a1 is vertically connected with the corner part of the bottom surface of the upper die 2, the guide cylinder a2 is embedded in the corner of the lower die 4, the center of the bottom of the movable block a4 is connected with one end of the pulling rope b, the other end of the pulling rope b passes through the through hole a5 and is connected with the rotating group e, the limiting plate a3 is arranged to isolate the movable block a4 from the guide rod a1, and the guide rod a1 can generate magnetic attraction force on the movable block a4 and prevent the movable block a4 from being attached to the guide rod a1 due to the magnetic attraction force.

Guide bar a1 is including body of rod a11, permanent magnet a12, collets a13, the bottom surface of body of rod a11 excessively cooperates collets a13, collets a13 is embedded to have permanent magnet a12, permanent magnet a12 is positive relative with movable block a4, body of rod a11 runs through in guide cylinder a2, permanent magnet a 12's setting is based on the magnetism principle, can attract iron.

The movable block a4 comprises an iron block a41, an insulating seat a42 and a round hole a43, the iron block a41 is arranged in the insulating seat a42, the round hole a43 is formed in the top surface of the insulating seat a42, the iron block a41 is right opposite to the permanent magnet a12, the center of the bottom surface of the insulating seat a42 is connected with a traction rope b, and the round hole a43 is arranged to increase the suction force between the iron block a41 and the permanent magnet a 12.

The air extracting disc c comprises a central gear c1, a central shaft c2, a limiting disc c3, a spring c4, an air extracting group c5 and a guide plate c6, a central shaft c2 in clearance fit with the limiting disc c3 is installed at the central position of the limiting disc c3, a central gear c1 is excessively matched with the bottom of the central shaft c2, an air extraction group c5 is arranged in the limiting disc c3, eight or more groups of air extraction groups c5 are arranged in a circular array, the air extraction sets c5 are movably matched with a spring c4, one end of the spring c4 is connected with the guide plate c6, the other end of the spring c4 is connected with the central shaft c2, the guide plate c6 is internally provided with a limiting disc c3, the central gear c1 is in transmission connection with a rotating group e, the top surface of the limiting disc c3 is provided with an air guide disc d communicated with an air extraction set c5, and the clockwork spring c4 is arranged to enable a plurality of air extraction sets c5 to synchronously extract air or inflate air, so that the air extraction or inflation amount is increased, and the air extraction or inflation efficiency is improved.

The air extracting set c5 comprises an arc-shaped block c51, a piston rod c52, an air inlet head c53, an outer cylinder c54 and an arc-shaped channel c55, the arc-shaped block c51 is provided with an arc-shaped channel c55, the arc-shaped block c51 is vertically connected with one end of a piston rod c52, the piston rod c52 penetrates through the outer cylinder c54, the air inlet head c53 is arranged at one end of the outer cylinder c54 far away from the arc-shaped block c51, the air inlet head c53 is communicated with an air guide disc d, the outer cylinder c54 is fixedly connected with the inner end face of a limiting disc c3, the clockwork spring c4 penetrates through an arc-shaped channel c55, the arc-shaped channel c55 is arranged to be better matched with the clockwork c4, the abrasion degree of the clockwork spring c4 on the arc-shaped block c51 can be reduced, the service life of the arc-shaped block c51 can be prolonged, the air extracting set c5 can extract air from a die cavity after the die cavity, the, is convenient for demoulding.

The air guide disc d comprises a disc body d1, a communicating pipe d2 and an air exhaust cover d3, the air exhaust cover d3 is installed at the center of the disc body d1, the eight and more parts of the air exhaust cover d3 are communicated with a communicating pipe d2, the communicating pipe d2 is connected with the disc body d1, one end, far away from the air exhaust cover d3, of the communicating pipe d2 is communicated with an air inlet head c53, the disc body d1 is fixed to the top surface of a limiting disc c3, and the air guide disc d is arranged to guide out or guide in air in a concentrated mode, so that arrangement of branch pipes is reduced.

The rotating group e comprises a first hinge plate e1, a planetary gear e2, an external gear e3, a rotating shaft e4 and a second hinge plate e5, wherein the first hinge plate e1 and the second hinge plate e5 form an X shape, the centers of the first hinge plate e1 and the second hinge plate e5 are connected together through a torsion spring shaft, the top surface of the first hinge plate e1 is fixed with an external gear e3 which is a concentric point, the external gear e3 is internally connected with a planetary gear e2 in a transmission manner, the planetary gear e2 is provided with three rotating shafts e4 which are in interference fit, the three planetary gears e2 are all meshed with a central gear c1, the central gear c1 and the external gear e3 are concentric gears, the two tail ends of the first hinge plate e1 and the second hinge plate e5 are both connected with the bottom center of an insulating seat a42 through a traction rope b, the planetary gears e2, the external gear e3 and the central gear c1 are combined to make the number of the central gear e1 be three times that of the external gear 3, thereby increasing the air extraction stroke and completely extracting the air in the die cavity.

Guide cylinder a2 adopts aluminium or copper product, does not take place magnetic reaction based on aluminium, copper and magnet, so can be completely cut off permanent magnet a12 and lower mould 4, simultaneously based on lenz's law, can slow down the falling speed of going up mould 2 again, prevent to go up mould 2 and lower mould 4's rigid collision.

Urceolus c54 is bilayer structure setting, and it has the ice crystal to embed, can cool off the air, is convenient for follow-up with cold air blowing to moulding, further cools off moulding, is convenient for mould a drawing of patterns.

The working principle of the invention is as follows: the upper die 2 and the lower die 4 are clamped under the guiding action of the guide rod a1 and the guide cylinder a2, when the guide rod a1 retracts towards the guide cylinder a2 until the guide rod is limited by the limit plate a3, the clamping is successful, at this time, the permanent magnet a12 generates suction force on the iron block a41, so that the insulating seat a42 rises until the insulating seat a3 is limited by the limit plate a3, in the process, the movable block a4 generates pulling force on the first hinge plate e1 and the second hinge plate e5 through the traction rope b, so that the first hinge plate e1 and the second hinge plate e5 rotate in opposite directions by taking the connected torsion spring shaft as the center, so that the first hinge shaft c2 e1 drives the outer gear e3 to rotate, the central gear c1 is linked through the planetary gear e2, so that the pulling force on the spring c4 is released while the central shaft c2 rotates, so that the force on the central shaft c4 is reduced to generate an outer pushing force on the arc 51 c 7, so as to pull the piston rod 54 to draw the air exhaust cylinder 54, air in the die cavity enters the outer cylinder c54 through the exhaust groove, the air extraction cover d3, the communicating pipe d2 and the air inlet head c53 and is cooled through ice crystals;

when the mold is opened, when the guide rod a1 is far away from the limit plate a3, the magnetic attraction of the permanent magnet a12 to the iron block a41 disappears, the movable block a4 falls due to self weight, and simultaneously, the pulling force to the traction rope b is released, so that the stress on the first hinge plate e1 and the second hinge plate e5 is gradually reduced, the elastic force is restored by taking the accumulated force of the torsion spring shaft during mold closing as the elastic force, the outer gear e3 drives the central gear c1 to rotate reversely through the planetary gear e2, the central shaft c2 winds the spring c4 inwards, the piston rod c52 pushes the outer cylinder c54 to inflate, air is diffused to the plastic part through the air inlet head c53, the communicating pipe d2, the air exhaust cover d3 and the exhaust groove, the plastic part is further cooled, and demolding of the plastic part is facilitated.

In summary, the technical progress obtained by the invention compared with the prior art is as follows: the invention combines the positioning set, the traction rope, the air exhaust disc, the air guide disc and the rotating set, based on Lenz law, when closing the mold, the upper mold falls slowly to prevent rigid collision when closing the mold, and falls slowly to discharge most of air in the mold cavity in time, after closing the mold, based on the magnetic attraction principle, the invention uses the magnetic attraction as a power source, uses the characteristics of a spiral spring to simultaneously and synchronously exhaust a plurality of air exhaust sets, improves the air exhaust efficiency, uses the three times of revolution of a planetary gear set to increase the air exhaust stroke to increase the air exhaust amount, enables the air in the mold cavity to be completely discharged, avoids the air and the injected melt mixing, prevents the generation of bubbles, enables the mechanical strength, the weight and the aesthetic property of the plastic piece not to be influenced, ensures the quality of the plastic piece, can cool the exhausted air, further cools the plastic piece after opening the mold, is convenient for demoulding of the plastic part.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides an air can exhaust injection mold after compound die, its structure includes footstock (1), goes up mould (2), exhaust mechanism (3), lower mould (4), connecting block (5), base (6), it links footstock (1) on mould (2) to go up, it is connected with lower mould (4) through exhaust mechanism (3) to go up mould (2), lower mould (4) meet its characterized in that through connecting block (5) and base (6):

the exhaust mechanism (3) comprises a positioning group (a), a traction rope (b), an air extracting disc (c), an air guide disc (d) and a rotating group (e), the air extracting disc (c) is connected with the air guide disc (d) and is connected with the rotating group (e) at the lower part, the rotating group (e) is connected with the positioning group (a) through the traction rope (b), the positioning group (a) connects the upper die (2) with the lower die (4), and the air extracting disc (c) is arranged on the lower die (4);

the positioning group (a) comprises a guide rod (a 1), a guide cylinder (a 2), a limiting plate (a 3), a movable block (a 4) and a through hole (a 5), wherein the bottom of the guide cylinder (a 2) is provided with the through hole (a 5), the movable block (a 4) and the limiting plate (a 3) are arranged in the through hole, the guide cylinder (a 2) is also matched with the guide rod (a 1), and the movable block (a 4) is connected to the rotating group (e) through a traction rope (b);

the air extracting disc (c) comprises a central gear (c 1), a central shaft (c 2), a limiting disc (c 3), a spring (c 4), an air extracting group (c 5) and a guide plate (c 6), wherein the central shaft (c 2) with the central gear (c 1) is arranged on the limiting disc (c 3), eight or more groups of air extracting groups (c 5) matched with the spring (c 4) are arranged in the limiting disc (c 3), the spring (c 4) is connected with the guide plate (c 6) and the central shaft (c 2), the central gear (c 1) is connected with the rotating group (e), and an air guiding disc (d) is arranged on the limiting disc (c 3);

the air extracting set (c 5) comprises an arc-shaped block (c 51), a piston rod (c 52), an air inlet head (c 53), an outer cylinder (c 54) and an arc-shaped channel (c 55), the piston rod (c 52) is connected with the arc-shaped block (c 51) with the arc-shaped channel (c 55), the piston rod (c 52) penetrates through the outer cylinder (c 54), the outer cylinder (c 54) is communicated with an air guide disc (d) through the air inlet head (c 53), the outer cylinder (c 54) is connected with a limiting disc (c 3), and the spring (c 4) penetrates through the arc-shaped channel (c 55);

the rotating group (e) comprises a first hinge plate (e 1), a planetary gear (e 2), an external gear (e 3), a rotating shaft (e 4) and a second hinge plate (e 5), wherein the first hinge plate (e 1) is connected with the second hinge plate (e 5), the first hinge plate (e 1) is provided with an external gear (e 3) meshed with the planetary gear (e 2), the planetary gear (e 2) is provided with three rotating shafts (e 4) matched with the three rotating shafts, the three planetary gears (e 2) are meshed with a central gear (c 1), and the first hinge plate (e 1) and the second hinge plate (e 5) are connected with an insulating seat (a 42) through a traction rope (b).

2. An injection mold according to claim 1, wherein the mold is configured to allow air to escape after closing the mold, and wherein: guide bar (a 1) is including body of rod (a 11), permanent magnet (a 12), collets (a 13), be equipped with collets (a 13) of taking permanent magnet (a 12) at the bottom of body of rod (a 11), permanent magnet (a 12) is just relative with movable block (a 4), body of rod (a 11) runs through in guide cylinder (a 2).

3. An injection mold according to claim 1, wherein the mold is configured to allow air to escape after closing the mold, and wherein: the movable block (a 4) comprises an iron block (a 41), an insulating seat (a 42) and a round hole (a 43), the round hole (a 43) and a built-in iron block (a 41) are formed in the insulating seat (a 42), the iron block (a 41) is right opposite to the permanent magnet (a 12), and the bottom of the insulating seat (a 42) is connected with a traction rope (b).

4. An injection mold according to claim 1, wherein the mold is configured to allow air to escape after closing the mold, and wherein: air guide dish (d) is including disk body (d 1), closed tube (d 2), aspirating cover (d 3), disk body (d 1) are installed and are covered (d 3) with the aspirating of closed tube (d 2) intercommunication, closed tube (d 2) communicate in air inlet head (c 53), disk body (d 1) are fixed in spacing dish (c 3).