CN216885035U - Injection mold - Google Patents

Abstract

The utility model relates to an injection mold, which comprises a fixed mold, a movable mold, a first block, a first elastic part and a power source, wherein: the fixed die is provided with a fixed die cavity; the movable die is provided with a movable die cavity, when the movable die and the fixed die are closed, the fixed die cavity and the movable die cavity adopt a die drawing design, and the minimum die drawing caliber of the shaping cavity is equal to the maximum die drawing caliber of the movable die cavity; the first block is designed by adopting a drawing mode, the minimum drawing surface of the first block is close to the minimum drawing surface of the movable cavity, the first block is arranged in the movable cavity, and the drawing angle of the first block is not smaller than that of the movable cavity; the first elastic piece is in a compressed state, one end of the first elastic piece is connected with the movable die, and the other end of the first elastic piece is connected with the first block, so that the first block is abutted against the movable die cavity; the power source pushes the first block to move towards the direction of the fixed cavity so as to solve the technical problem that the product cannot be effectively pushed out of the mold cavity by the ejector pin.

Description

Injection mold

Technical Field

The utility model relates to the field of injection molding, in particular to an injection mold.

Background

Chinese patent CN202021053816.8 discloses an injection mold, which comprises a front mold assembly and a rear mold assembly, wherein a spring block capable of moving back and forth is arranged in a front mold core of the front mold assembly, and a spring is arranged at the root of the spring block; the back mould kernel of the back mould component is provided with an embedding top matched with the inner hole of the product, the embedding top is leaned on the elastic block, and a cavity for injection molding products is formed among the front mould kernel, the back mould kernel, the embedding top and the elastic block. By adopting the technical scheme of the utility model, after die assembly, the spring block is jacked by jacking, and reaches the position matched with a product to be molded; when the mold is opened, under the action of the jacking force of the spring, the elastic block is ejected towards the rear mold side along with the product, so that the product is smoothly separated from the front mold, and the product is effectively prevented from being stuck to the front mold; the front mold side draft angle can be made smaller, the product function requirement can be better adapted, and the product quality is improved;

although the utility model can solve the problem of insufficient space of the thimble, the thimble has short service life and is easy to break, and can cause deep dent on the ejection surface of the product, thereby affecting the appearance of the product, in the actual use process, the mould drawing treatment is adopted for the cavity, thereby effectively solving the technical problem of product mould sticking, but the thrust of the thimble can also affect the key factor that the product can not push out the cavity, and as for the existing mould, a communicated gap can exist between the cavity and the thimble hole of the thimble, thereby causing the molten material to permeate into the gap, further causing the thimble to be incapable of effectively pushing the formed product, or the sealing performance between the cavity and the thimble hole of the thimble is good, and causing the product to be incapable of being pushed out the cavity of the mould because the acting force of the thimble is small;

for this reason, there is an urgent need to solve the existing problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems, an object of the present invention is to provide an injection mold, so as to solve the technical problem that a product cannot be effectively pushed out of a mold cavity by an ejector pin.

In order to achieve the above object, the present invention provides an injection mold, comprising a fixed mold, a movable mold, a first block, a first elastic member and a power source, wherein:

the fixed die is provided with a fixed die cavity;

the movable die is provided with a movable die cavity, when the movable die and the fixed die are closed, the fixed die cavity and the movable die cavity adopt a die drawing design, and the minimum die drawing caliber of the shaping cavity is equal to the maximum die drawing caliber of the movable die cavity;

the first block is designed by adopting a drawing mode, the minimum drawing surface of the first block is close to the minimum drawing surface of the movable cavity, the first block is arranged in the movable cavity, and the drawing angle of the first block is not smaller than that of the movable cavity;

the first elastic piece is in a compressed state, one end of the first elastic piece is connected with the movable die, and the other end of the first elastic piece is connected with the first block, so that the first block is abutted against the movable die cavity;

and the power source pushes the first block to move towards the fixed cavity.

As a further description of the above technical solution:

the bottom surface of the fixed cavity is provided with threads, and the surface of the first block, which is in contact with a product, is also provided with threads.

As a further description of the above technical solution:

the draft angle of the first block is the same as that of the movable mould cavity.

As a further description of the above technical solution:

the movable mould comprises a first plate, a second plate, a first rod, a circular truncated cone and a third plate, wherein:

the movable cavity is formed in the first plate, a first hole is formed in the first plate, and the first hole is communicated with the movable cavity;

the second plate is provided with a second hole and a third hole, the second hole is communicated with the third hole, and the aperture of the second hole is smaller than that of the third hole;

one end of the first rod is fixedly connected with the first block, and the other end of the first rod penetrates through the first hole and the second hole and is arranged in the third hole;

the circular truncated cone is fixedly connected with the first rod;

the first elastic piece is connected with the circular truncated cone and the third hole respectively;

the third plate is fixedly connected with the second plate, and the circular truncated cone and the third plate are mutually abutted.

As a further description of the above technical solution:

the fixed die is fixedly provided with a guide rod, the first plate is provided with a guide groove, and the guide rod is matched with the guide groove.

As a further description of the above technical solution:

the positioning device is characterized by further comprising a second elastic piece and a positioning rod, wherein the first blind hole is formed in the first plate, the second blind hole is formed in the second plate, two ends of the positioning rod are arranged in the first blind hole and the second blind hole respectively, and the second elastic piece is abutted to the first plate and the second plate respectively.

As a further description of the above technical solution:

the third plate is fixedly connected with the second plate through bolts, the circular truncated cone is in threaded connection with the first rod, and the first block is fixedly connected with the first rod through integral forming.

As a further description of the above technical solution:

the third plate is provided with air holes, and the air holes are communicated with the third holes;

the power supply includes hard pipe, clamp, hose and air pump, wherein:

the hard tube is fixedly arranged in the air hole;

the hose is sleeved on the hard pipe;

the clamp is used for fixing the hose on the hard pipe;

the air pump supplies air to the hose.

Compared with the prior art, the utility model has the beneficial effects that:

when the fixed die and the movable die are combined, because the first block is arranged in the movable die cavity and the minimum die drawing surface of the first block is close to the minimum die drawing surface of the movable die cavity, the first block can be always abutted in the movable die cavity under the action of the compression force of the first elastic piece, and because the die drawing angle of the first block is not smaller than the die drawing angle of the movable die cavity, when the first block is abutted with the movable die cavity, the maximum die drawing surface of the first block is abutted with the movable die cavity, at the moment, the first block and the movable die cavity realize line sealing, so that the molten material can be prevented from flowing into the space between the maximum die drawing surface of the first block and the minimum die drawing surface of the movable die cavity, the shape of the product is finally influenced, the forming cavity space of the product is the space between the maximum die drawing surface of the first block and the maximum die drawing surface of the fixed die cavity, and the space is also the die drawing space, therefore, fashioned product is also the drawing die product, when first piece removes, also conveniently release the product from this drawing die space, with regard to the thrust of first piece, because the atmospheric pressure that the power supply gave is invariable, the thrust size of first piece receives the contact surface of first piece and product to decide, and here, the contact surface of first piece and product coincides each other, consequently, thrust this moment is the biggest thrust, to sum up, thereby adopt this kind of mould can effectual solution product among the prior art because of the not enough or technical problem that the sticking die's of thrust problem can't the drawing of patterns, in addition, here only needs a first piece to promote, thereby replaced the promotion of using a plurality of thimbles in the tradition, use a plurality of thimbles to promote and cause the condition emergence of having a plurality of indents on the finished product easily.

(two) although the problem of product drawing of patterns can be solved to above-mentioned process, but at the in-process of operation, still there is the viscosity too high because of the product, thereby make the product and first piece glue together, and then lead to first piece at the in-process that promotes, product and first piece move together, finally still can not reach the purpose of the effective drawing of patterns of product, in order to solve this kind of problem, bottom surface and first piece through finalizing the design chamber are equipped with the screw thread with the face of product contact, thereby reduce the contact surface of product and design chamber and first piece, and then the viscosity of product and design chamber and first piece has been reduced, finally make fixed mould and movable mould when the die sinking, the product can effectually break away from fixed mould chamber and first piece, the product is under the thrust effect of first piece, thereby realize the mesh of the drawing of patterns of product.

(III) in the above-mentioned embodiment (a) and (II), although the technical problem of product drawing of patterns has been solved, if the draft angle of first piece is greater than the draft angle of moving the die cavity, first piece is under the effect that receives the compression force of first elastic component for a long time, make the biggest draft face of first piece diminish easily, thereby make the shaping chamber of product change, finally lead to though can realize easily drawing of patterns of product, but the shape of product is different with actual demand shape, in order to solve this kind of problem, through the draft angle with the moving die cavity with first piece the same, thereby can make the joint that first piece can be stable in moving the die cavity, prevent that first piece from appearing warping under the effect of first elastic component, the life of this mould is prolonged.

And (IV) in order to realize the first elastic piece, the first elastic piece can be always kept in a compressed state, so that the design intention that the first piece can be abutted in the movable cavity is ensured, a stepped hole is formed by arranging the second hole and the third hole, the first rod and the circular truncated cone form a stepped platform, and the third plate and the second plate are fixedly connected, so that the first elastic piece can be always kept in a compressed state when being installed in the third hole.

The key of the product forming lies in that the fixed mold cavity and the movable mold cavity can be perfectly matched when the movable mold and the fixed mold are closed, if the dislocation occurs, a finished product cannot form an expected product, in order to solve the problem, a guide rod and a guide groove are arranged, so that the moving of the movable mold is guided, and finally, the fixed mold cavity can be perfectly matched with the movable mold cavity when the mold is closed.

(six) mould when the compound die, the impact force that often appears moving mould and fixed mould is too big to cause moving mould and fixed mould certain damage to appear, in order to solve this kind of problem, through setting up the second elastic component, thereby can cushion the impact force of moving mould and fixed mould, and then reduce the damage between moving mould and the fixed mould.

(VII) certain problems can occur in the long-time use process of the mould, the mould needs to be overhauled, the movable mould is required to be disassembled on the premise of maintenance, the above scheme can achieve the respective expected purposes, but if the first rod and the circular truncated cone are fixed in a non-threaded connection manner, there is no way to disassemble the first plate and the second plate, and in order to solve this problem, the circular truncated cone and the first rod are fixedly connected by means of screw threads, thereby achieving the purpose of conveniently disassembling the circular truncated cone and the first rod, effectively disassembling the first plate and the second plate, preventing the threaded connection between the circular truncated cone and the first rod from loosening by the first elastic piece, and first piece and first pole adopt integrated into one piece fixed connection, play the purpose of reinforcing joint strength to the life of extension first piece.

Thereby (eight) moving die utensil is through its compound die or the die sinking that removes realization and fixed mould in the injection molding machine, and thereby the power supply here chooses for use the removal that the air pump air feed realized first piece, at the in-process of air pump air feed, in order to guarantee the stability of atmospheric pressure, also need to make the gas circuit have certain extension function, through setting up the hose, thereby reach the removal that can adapt to moving die utensil, finally realize that the air pump can be stable for the purpose of first piece air feed.

Drawings

FIG. 1 is a schematic view of an injection mold of the present invention.

In the figure: 1. fixing a mold; 11. a cavity is determined; 12. a first nozzle; 2. moving the mold; 21. a first plate; 211. a movable cavity; 212. a first hole; 213. a guide groove; 214. a first blind hole; 215. a second water gap; 22. a second plate; 221. a second hole; 222. a third aperture; 223. a second blind hole; 23. a first lever; 24. a circular truncated cone; 25. a third plate; 251. air holes; 3. a first block; 31. a thread; 4. a first elastic member; 5. a power source; 51. a rigid tube; 52. clamping a hoop; 53. a hose.

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.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Example 1:

the utility model provides an injection mold, please refer to fig. 1, which comprises a fixed mold 1, a movable mold 2 and a power source 5, wherein:

the fixed die 1 is provided with a first water gap 12 and two fixed die cavities 11, the two fixed die cavities 11 are symmetrically arranged relative to the first water gap 12, the first water gap 12 is communicated with the two fixed die cavities 11, in addition, the fixed die 1 is fixedly connected to an injection molding machine, and four guide rods are fixedly connected to the right side of the fixed die 1.

Moving die 2, including first board 21, second board 22, third board 25, two first poles 23, two round platforms 24, two first pieces 3, two locating levers, two first elastic components 4 and two second elastic components, wherein: the left side of the first plate 21 is respectively provided with four guide grooves 213 which are matched with the guide rod and penetrate through the guide rod, the left side of the first plate 21 is further provided with a second water gap 215 and two movable cavities 211, the two movable cavities 211 are symmetrically arranged relative to the second water gap 215 and the second water gap 215 is communicated with the two movable cavities 211, when the fixed mold 1 is abutted to the first plate 21, the fixed mold cavity 11 and the movable cavities 211 form a drawing design, namely the minimum drawing surface of the fixed mold cavity 11 and the maximum drawing surface of the movable cavities 211 are the same in shape, the right side of the first plate 21 is provided with two first blind holes 214 and two first holes 212, the two first holes 212 are arranged between the two first blind holes 214, and the first holes 212 are communicated with the movable cavities 211; two second blind holes 223 and two second holes 221 are respectively formed in the left side of the second plate 22, the two second holes 221 are arranged between the two second blind holes 223, two third holes 222 are formed in the right side of the second plate 22, the third holes 222 are communicated with the second holes 221, the third holes 222 and the second holes 221 are coaxially arranged, the hole diameter of the third holes 222 is larger than that of the second holes 221, the hole diameter of the second holes 221 is the same as that of the first holes 212, a second elastic part (spring) is sleeved on a positioning rod, and two ends of the positioning rod are respectively arranged in the first blind holes 214 and the second blind holes 223; a first block 3 is fixedly connected to the left end of a first rod 23, a circular truncated cone 24 is fixedly connected to the right end of the first rod 23, the first block 3 is also designed by adopting a drawing mode, the drawing mode angle of the first block 3 is not smaller than that of the movable cavity 211, when the first block 3 is arranged in the movable cavity 211, the minimum drawing mode surface of the first block 3 is positioned on the right side of the movable cavity 211, the first rod 23 respectively penetrates through the first hole 212 and the second hole 221, the circular truncated cone 24 is positioned in the third hole 222, and two ends of a first elastic part 4 (spring) are respectively fixedly connected with the left side surface of the circular truncated cone 24 and the right side surface of the third hole 222; the third plate 25 is fixedly connected to the right side of the second plate 22, at this time, the right side of the circular truncated cone 24 abuts against the left side of the third plate 25, and finally the first elastic element 4 is in a compressed state, and two air holes 251 are formed in the left side of the third plate 25, wherein the air holes 251 and the third holes 222 are communicated with each other.

The power source 5, impel first piece 3 to remove towards the direction of design chamber 11, including hard pipe 51, clamp 52, hose 53 and air pump, wherein: the left end of the hard tube 51 is abutted against the right side of the circular truncated cone 24, the hard tube 51 is fixedly arranged in the air hole 251, the hose 53 is sleeved on the hard tube 51, the clamp 52 is used for fixing the hose 53 on the hard tube 51, and the air pump supplies air to the hose 53.

The working mode of the utility model is described as follows:

after the fixed mold 1 and the movable mold 2 are closed, the melted material flows into the fixed mold cavity 11 and the movable mold cavity 211 from the first water gap 12 and the second water gap 215, because the first block 3 is arranged in the movable mold cavity 211, and the first block 3 adopts a mold drawing design, and the minimum mold drawing surface is positioned at the right side of the movable mold cavity 211, the first block 3 can be always abutted in the movable mold cavity 211 under the action of the compression force of the first elastic member 4, and because the mold drawing angle of the first block 3 is not smaller than the mold drawing angle of the movable mold cavity 211, when the first block 3 is abutted with the movable mold cavity 211, the maximum mold drawing surface of the first block 3 and the movable mold cavity 211 are abutted with each other, at the moment, the first block 3 and the movable mold cavity 211 realize line sealing, thereby preventing the melted material from flowing into the space between the maximum mold drawing surface of the first block 3 and the minimum mold drawing surface of the movable mold cavity 211, and finally influencing the molding of the product, the space of the forming cavity of the product is the space between the maximum die-drawing surface of the first block 3 and the maximum die-drawing surface of the forming cavity 11, and the space is also the die-drawing space, so the formed product is also a die-drawing product, when the first block 3 moves, the product is conveniently pushed out from the die-drawing space, as for the thrust of the first block 3, because the air pressure given by the power source 5 is constant, the thrust of the first block 3 is determined by the contact surface of the first block 3 and the product, and here, the contact surface of the first block 3 and the product is mutually overlapped, therefore, the thrust at this moment is the maximum thrust, in sum, the technical problem that the product cannot be demoulded due to insufficient thrust or die sticking in the prior art can be effectively solved by adopting the die, in addition, only one first block 3 is needed to push at this place of the traditional pushing by using a plurality of thimbles, the situation that a plurality of dents exist on a finished product is easily caused by pushing by a plurality of ejector pins;

in addition, the key of product molding is that when the movable mold 2 and the fixed mold 1 are closed, the shaping cavity 11 and the movable cavity 211 can be perfectly matched, if a dislocation occurs, a finished product cannot form an expected product, and in order to solve the problem, a guide rod and a guide groove 213 are arranged, so that a guide effect is provided for the movement of the movable mold 2, and finally, when the molds are closed, the shaping cavity 11 and the movable cavity 211 can be perfectly matched;

secondly, when the mold is closed, the impact force of the movable mold 2 and the fixed mold 1 is often too large, so that the movable mold 2 and the fixed mold 1 are damaged to a certain extent, and in order to solve the problem, the impact force of the movable mold 2 and the fixed mold 1 can be buffered by arranging the second elastic piece, so that the damage between the movable mold 2 and the fixed mold 1 is reduced;

finally, thereby moving mould 2 through its removal in the injection molding machine realize with the compound die or the die sinking of stationary mould 1, thereby and the power supply 5 here chooses for use the air pump air feed to realize the removal of first piece 3, at the in-process of air pump air feed, in order to guarantee the stability of atmospheric pressure, also need to make the gas circuit have certain extension function, through setting up hose 53, thereby reach the removal that can adapt to moving mould 2, finally realize that the air pump can be stable be the purpose of first piece 3 air feeds, it is worth noting: the power source for the movement of the moving mold 2 is the thrust of the cylinder, i.e. the right side of the third plate 25 is fixedly connected with the air rod of the cylinder.

Example 2:

in example 1, although the problem of product demoulding can be solved, during the operation, the product is stuck with the first block 3 due to the high viscosity of the product, and then the first block 3 moves together during the pushing process, and finally the purpose of effective demoulding of the product cannot be achieved, and in order to solve the problem, the utility model provides another preferable embodiment:

a left side surface of a shaping cavity 11 is provided with threads 31, and a right side surface of a first block 3 is provided with the threads 31.

The working mode of the utility model is described as follows:

be equipped with screw thread 31 through the left surface at design chamber 11 and the right flank of first piece 3, thereby reduce the contact surface of product and fixed die cavity 11 and first piece 3, and then reduced the viscosity of product and fixed die cavity 11 and first piece 3, finally make fixed mould 1 and movable mould 2 when the die sinking, the product can effectually break away from fixed die cavity 11 and first piece 3, the product is under the thrust effect of first piece 3, thereby realize the mesh of the drawing of patterns of product.

Example 3:

in embodiment 1 or 2, although the technical problem of product demoulding is solved, if the draft angle of the first block 3 is larger than that of the movable die cavity 211, the maximum draft surface of the first block 3 is easily reduced under the compression force of the first elastic member 4 for a long time, so that the forming cavity of the product is changed, and finally the product is easy to demould, but the shape of the product is different from the actual required shape, and in order to solve the problem, the utility model provides another preferable embodiment:

in an injection mold, the draft angle of a first block 3 is the same as the draft angle of a movable cavity 211.

The working mode of the utility model is as follows:

the draft angle through with first piece 3 is the same with the draft angle that moves die cavity 211 to can make the joint that first piece 3 can be stable move die cavity 211 in, prevent that first piece 3 from appearing warping under the effect of first elastic component 4, prolong the life of this mould.

Example 4:

in the above embodiment, the mold has a certain problem in the long-term use, and needs to be repaired, and the movable mold 2 needs to be disassembled for the repair, but the above solution can achieve the respective intended purpose, but if the first rod 23 and the circular truncated cone 24 are fixed by non-threaded connection, there is no way to disassemble the first plate 21 and the second plate 22, and in order to solve this problem, the present invention provides another preferred embodiment:

a third plate 25 and a second plate 22 are fixedly connected through bolts, a circular truncated cone 24 is in threaded connection with a first rod 23, and a first block 3 and the first rod 23 are fixedly connected through integral forming.

The working mode of the utility model is as follows:

through the mode fixed connection that adopts the screw thread with round platform 24 and first pole 23, thereby can reach the purpose of conveniently dismantling round platform 24 and first pole 23, thereby can carry out effectual dismantlement with first board 21 and second board 22, first elastic component 4 here still plays the purpose that prevents that the threaded connection between round platform 24 and the first pole 23 from appearing not hard up, and first piece 3 and first pole 23 adopt integrated into one piece fixed connection, play reinforcing joint strength's purpose, thereby prolong the life of first piece 3.

Example 5:

in the case of no technical conflict, any permutation and combination in embodiments 1 to 4 is also included.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (8)

1. An injection mold, characterized in that, including fixed mould (1), movable mould (2), first piece (3), first elastic component (4) and power supply (5), wherein:

the fixed die (1) is provided with a fixed die cavity (11);

the movable die (2) is provided with a movable die cavity (211), when the movable die (2) and the fixed die (1) are closed, the fixed die cavity (11) and the movable die cavity (211) adopt a die drawing design, and the minimum die drawing caliber of the shaping cavity (11) is equal to the maximum die drawing caliber of the movable die cavity (211);

the first block (3) is designed by adopting a drawing mode, the minimum drawing surface of the first block (3) is close to the minimum drawing surface of the movable cavity (211), the first block (3) is arranged in the movable cavity (211), and the drawing angle of the first block (3) is not smaller than that of the movable cavity (211);

the first elastic piece (4) is in a compressed state, one end of the first elastic piece is connected with the movable die (2), and the other end of the first elastic piece is connected with the first block (3), so that the first block (3) is abutted to the movable die cavity (211);

and the power source (5) pushes the first block (3) to move towards the direction of the fixed cavity (11).

2. An injection mold according to claim 1, wherein: the bottom surface of the fixed cavity (11) is provided with threads (31), and the surface of the first block (3) contacting with a product is also provided with the threads (31).

3. An injection mould according to claim 1 or 2, characterized in that: the draft angle of the first block (3) is the same as that of the movable cavity (211).

4. An injection mold according to claim 1, wherein: the moving die (2) comprises a first plate (21), a second plate (22), a first rod (23), a circular truncated cone (24) and a third plate (25), wherein:

the movable die cavity (211) is formed in the first plate (21), a first hole (212) is formed in the first plate (21), and the first hole (212) is communicated with the movable die cavity (211);

the second plate (22) is provided with a second hole (221) and a third hole (222), the second hole (221) and the third hole (222) are communicated with each other, and the aperture of the second hole (221) is smaller than that of the third hole (222);

one end of the first rod (23) is fixedly connected with the first block (3), and the other end of the first rod passes through the first hole (212) and the second hole (221) and is arranged in the third hole (222);

the round table (24) is fixedly connected with the first rod (23);

the first elastic piece (4) is connected with the circular truncated cone (24) and the third hole (222) respectively;

the third plate (25) is fixedly connected with the second plate (22), and the circular truncated cone (24) and the third plate (25) are mutually abutted.

5. An injection mould according to claim 4, characterized in that: the fixed die (1) is fixedly provided with a guide rod (12), the first plate (21) is provided with a guide groove (213), and the guide rod (12) is matched with the guide groove (213).

6. An injection mould according to claim 4 or 5, characterized in that: still include second elastic component (6) and locating lever (7), first blind hole (214) have been seted up on first board (21), second blind hole (223) have been seted up on second board (22), the both ends of locating lever (7) set up respectively in first blind hole (214) and second blind hole (223), second elastic component (6) respectively with first board (21) and second board (22) mutual butt.

7. An injection mold according to claim 6, wherein: the third plate (25) is fixedly connected with the second plate (22) through bolts, the circular truncated cone (24) is in threaded connection with the first rod (23), and the first block (3) is fixedly connected with the first rod (23) through integral forming.

8. An injection mold according to claim 7, wherein: the third plate (25) is provided with air holes (251), and the air holes (251) are communicated with the third hole (222);

the power supply (5) comprises a hard tube (51), a clamp (52), a hose (53) and an air pump, wherein:

a hard tube (51) fixedly arranged in the air hole (251);

a hose (53) which is sleeved on the hard pipe (51);

a clamp (52) for fixing the hose (53) to the rigid tube (51);

the air pump supplies air to the hose (53).

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