CN214023427U - Die casting die with exhaust structure - Google Patents

Abstract

The application discloses die casting die with exhaust structure, including pipe, bar frame, direction spout, motor, die-casting hole, spliced pole, go up T type post, first hydro-cylinder, first post hole, T type post down, second hydro-cylinder, second post hole, punching press post, U type long plate, drive slider, direction slider, square bar, stopper, reset spring, trilobed plate, square perforation, circle tray, interior gas duct, through-hole, outer gas duct and long screw rod. This application is rational in infrastructure, can be with the gaseous discharge of compression during die-casting, avoid compressing the condition that the exhaustless gas of discharge propped up the emergence deformation to the die casting inner wall, realize the function of convenient change die casting die head, can be located the pipe top port with the die-casting hole that corresponds aperture specification directly over, improve machining efficiency and can guarantee gradually die-casting deformation on the casting die and move down partial stability down, can utilize reset spring's elasticity to break away from through the good casting die of die-casting and mould simultaneously, be convenient for take out the die casting.

Description

Die casting die with exhaust structure

Technical Field

The application relates to a die casting die, in particular to a die casting die with an exhaust structure.

Background

Automobile parts, which are units forming the whole automobile part processing and products serving for automobile part processing, are developed internationally across companies in many countries in order to reduce cost and occupy the market, so that a die-casting die is used in the production process, the die-casting die is a method for casting liquid forging, and a process finished on a special die-casting die forging machine is characterized in that the basic process comprises the following steps: the molten metal is cast at low speed or high speed and filled into the cavity of the mold, and the mold has a movable cavity surface.

Automobile parts are when die-casting cylindricality concave surface, because there is gas between die-casting head structural part and the die-casting work piece of die casting die, and gas compression is difficult for discharging, very easily causes die-casting part structural part to be out of shape, and then influences the quality, and the required cylindricality concave surface internal diameter size of automobile parts has more the difference simultaneously, and single die-casting die need change die-casting head structural part, and the operation is time-consuming relatively, and machining efficiency is lower. Therefore, a die casting mold having a vent structure is proposed to address the above problems.

Disclosure of Invention

A die-casting die with an exhaust structure comprises a U-shaped long plate, a die-casting assembly, a replacing assembly and a bottom supporting assembly, wherein guide sliding grooves are formed in the side walls of two sides in the U-shaped long plate and are mutually connected with guide sliding blocks on the corresponding side in a sliding mode;

the die-casting assembly comprises a round pipe, a die-casting hole, an upper T-shaped column, a lower T-shaped column and a punching column, wherein a top port of the round pipe is in mutual contact with a bottom port of the die-casting hole, the top port of the die-casting hole is close to the bottom end face of the punching column, a second column hole is formed in the top end face of the punching column, a small-diameter column body part of the lower T-shaped column is slidably mounted in the second column hole, a first column hole is formed in the middle of the top end face of the lower T-shaped column, the small-diameter column body part of the upper T-shaped column is slidably mounted in the first column hole, and the corresponding parts of the upper end face and the lower end face of the punching column and the corresponding parts of the upper end face and the lower end face of the lower T-shaped column are respectively communicated through an outer gas duct and an inner gas duct which are annularly distributed;

the replacing assembly comprises a motor, a first oil cylinder, a second oil cylinder, a long screw and a traction sliding block, the motor is installed in the middle of one end face of a bar-shaped frame, the shaft rod end of the motor is connected with one end face of the long screw, the long screw is rotatably installed in the bar-shaped frame, the traction sliding block is in threaded connection with the long screw, the number of the first oil cylinders is four, the four first oil cylinders are installed at the edge of the top end face of an upper T-shaped column in an annular equidistant mode, the push rod ends of the four first oil cylinders are respectively connected with the edge of the top end face of a lower T-shaped column in a corresponding mode, the number of the second oil cylinders is four, the four second oil cylinders are installed on the inner side of the edge of the top end face of the lower T-shaped column in an annular equidistant mode, and the push rod ends of the four second oil cylinders are respectively connected with the edge of the top end face of a stamping column in a corresponding mode;

the support bottom assembly comprises a square rod, a limiting block, a reset spring, a three-blade plate and a round supporting block, the square rod is located at the middle position in the round pipe, the top end of the square rod is mounted at the middle position of the bottom of the round supporting block, the limiting block is mounted at the middle position of the square rod, the reset spring is sleeved on the square rod, the three-blade plate is mounted in the end opening of the round pipe, and the middle part of the three-blade plate is connected with the bottom of the square rod in a sliding mode through a square through hole.

Furthermore, the end surface of the bottom end of the upper T-shaped column, the end surface of the bottom end of the lower T-shaped column and the end surface of the bottom end of the stamping column are flush with each other, and the length of the stamping column is one fourth of the length of the small-diameter column part of the upper T-shaped column and one half of the length of the small-diameter column part of the lower T-shaped column respectively.

Furthermore, four through holes are formed in the edge of the top surface of the lower T-shaped column in an annular and equidistant mode, and the top ports of the through holes are respectively connected with the cylinder body ports of the four second oil cylinders.

Furthermore, the middle position of the end face of the top end of the upper T-shaped column is provided with one end of a connecting column, and the other end of the connecting column is connected with the push rod end of an external hydraulic oil cylinder.

Furthermore, the die-casting holes are three, the hole diameters of the three die-casting holes are different from each other, the three die-casting holes are alternately arranged in the middle of the top surface of the U-shaped long plate in a straight line shape, and the hole diameters of the three die-casting holes are consistent with the diameter of the punching column, the diameter of the small-diameter column of the lower T-shaped column and the diameter of the small-diameter column of the upper T-shaped column from left to right respectively.

Further, the round supporting block is slidably mounted in the top port of the round pipe, and the top surface of the round supporting block is flush with the top port of the round pipe.

Further, the direction slider is equipped with two, and two the direction slider symmetry is installed at pipe annular face top, the pipe is located U type long inboard one end, and the pipe internal diameter size circle is greater than die-casting hole aperture size.

Furthermore, the end faces of the two ends of the traction sliding block are communicated with each other through screw holes, and the screw holes are internally in threaded connection with the long screw rod parts.

Furthermore, the traction sliding block is slidably mounted in the bar-shaped frame, and the top surface of the traction sliding block is connected with the middle position of the other end in the U-shaped long plate.

Further, reset spring is located between stopper and the three leaf boards, and reset spring one end and three leaf board top intermediate position interconnect, the reset spring other end and stopper bottom surface interconnect.

The beneficial effect of this application is: the application provides a die casting die with exhaust structure and can change three kinds of different specification die-casting heads.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a perspective view of the overall structure of one embodiment of the present application;

FIG. 2 is a side view of the overall structure of one embodiment of the present application;

FIG. 3 is a top view of a circular tube top structure according to one embodiment of the present application;

FIG. 4 is a cross-sectional view of a circular tube top structure according to one embodiment of the present application;

FIG. 5 is a top view of a lower T-pillar top structure according to one embodiment of the present application;

FIG. 6 is a top view of a stamped column top structure according to one embodiment of the present application;

FIG. 7 is a schematic diagram of an internal structure of a strip frame according to an embodiment of the present application;

FIG. 8 is a schematic view of a three-blade plate and square bar connection according to an embodiment of the present application.

In the figure: 1. the device comprises a circular tube, 2, a strip-shaped frame, 3, a guide sliding groove, 4, a motor, 5, a die-casting hole, 6, a connecting column, 7, an upper T-shaped column, 8, a first oil cylinder, 9, a first column hole, 10, a lower T-shaped column, 11, a second oil cylinder, 12, a second column hole, 13, a stamping column, 14, a U-shaped long plate, 15, a traction sliding block, 16, a guide sliding block, 17, a square rod, 18, a limiting block, 19, a reset spring, 20, a three-blade plate, 21, a square through hole, 22, a round supporting block, 23, an inner air duct, 24, a through hole, 25, an outer air duct, 26 and a long screw rod.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all 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 application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 to 8, a die casting mold with an exhaust structure includes a U-shaped long plate 14, a die casting assembly, a replacing assembly and a bottom supporting assembly, wherein guide sliding grooves 3 are respectively formed on two side walls of the U-shaped long plate 14, and the guide sliding grooves 3 are mutually connected with guide sliding blocks 16 on the corresponding side in a sliding manner;

the die-casting assembly comprises a circular tube 1, a die-casting hole 5, an upper T-shaped column 7, a lower T-shaped column 10 and a stamping column 13, wherein a top port of the circular tube 1 is in mutual contact with a bottom port of the die-casting hole 5, the top port of the die-casting hole 5 is close to the bottom end face of the stamping column 13, a second column hole 12 is formed in the top end face of the stamping column 13, a small-diameter column body part of the lower T-shaped column 10 is arranged in the second column hole 12 in a sliding mode, a first column hole 9 is formed in the middle of the top end face of the lower T-shaped column 10, a small-diameter column body part of the upper T-shaped column 7 is arranged in the first column hole 9 in a sliding mode, and the edges of the upper end face and the lower end face of the stamping column 13 and the corresponding parts of the upper end face and the lower end face of the lower T-shaped column 10 are communicated through annular-distributed air duct 25 and annular-distributed internal air duct 23 respectively;

through the annular setting of outer gas duct 25 on punching press post 13 and the annular setting of interior gas duct 23 on T type post 10 down, can be with the gaseous exhaust of compression during die-casting, avoid the gaseous condition of taking place deformation of compressing exhaust to propping up the die casting inner wall, the die casting die of being convenient for simultaneously and die-casting finished product separation.

The replacement component comprises a motor 4, a first oil cylinder 8, a second oil cylinder 11, a long screw rod 26 and a traction sliding block 15, the motor 4 is arranged in the middle of the end face of one end of the strip-shaped frame 2, and the shaft rod end of the motor 4 is connected with one end face of the long screw 26, the long screw 26 is rotatably arranged in the strip-shaped frame 2, and the long screw 26 is connected with the dragging slide block 15 by screw thread, the first oil cylinder 8 is provided with four, and four first oil cylinders 8 are arranged at the edge of the top end surface of the upper T-shaped column 7 in an annular and equidistant manner, the push rod ends of the four first oil cylinders 8 are respectively and correspondingly connected with the edge of the top end surface of the lower T-shaped column 10, four second oil cylinders 11 are arranged, the four second oil cylinders 11 are annularly and equidistantly arranged on the inner side of the edge of the top end face of the lower T-shaped column 10, and the push rod ends of the four second oil cylinders 11 are respectively and correspondingly connected with the edge of the top end face of the stamping column 13;

the punching column 13 connected through the second column hole 12 moves upwards along the small-diameter column body part of the lower T-shaped column 10 in the contraction state by operating the second oil cylinder 11 group, the small-diameter column body part of the lower T-shaped column 10 can be exposed to serve as a die-casting head structure part of a die-casting die, the lower T-shaped column 10 moves upwards along the small-diameter column body part of the upper T-shaped column 7 in the contraction state of the first oil cylinder 8 in the same way, the small-diameter column body part of the T-shaped column 7 can be exposed to serve as the die-casting head structure part of the die-casting die, the function of conveniently replacing a die-casting head of the die-casting die is realized, meanwhile, the long screw 26 is driven by the operating motor 4 to rotate, the U-shaped long plate 14 connected through the traction sliding block 15 moves leftwards, the die-casting hole 5 corresponding to the aperture specification can be positioned right above the top port of the circular tube 1, the die-casting die suitable for three specification models, and the processing efficiency is improved.

The bottom supporting assembly comprises a square rod 17, a limiting block 18, a return spring 19, a three-blade plate 20 and a round supporting block 22, the square rod 17 is located in the middle of the inside of the round tube 1, the top end of the square rod 17 is installed in the middle of the bottom of the round supporting block 22, the limiting block 18 is installed in the middle of the square rod 17, the return spring 19 is sleeved on the square rod 17, the three-blade plate 20 is installed in the bottom port of the round tube 1, and the middle of the three-blade plate 20 is mutually connected with the bottom end of the square rod 17 in a sliding mode through a square through hole 21;

the bottom of the part to be subjected to die-casting deformation on the pressing piece is in surface contact with the top of the round supporting block 22, and the square rod 17 between the bottom of the round supporting block 22 and the three-blade plate 20 is partially sleeved with the return spring 19, so that the stability of the part moving downwards due to the gradual die-casting deformation on the pressing piece can be ensured, and meanwhile, the elasticity of the return spring 19 can be utilized to be separated from the die through the die-cast pressing piece, so that the die-cast piece can be taken out conveniently.

The bottom end face of the upper T-shaped column 7, the bottom end face of the lower T-shaped column 10 and the bottom end face of the stamping column 13 are flush with each other, and the length of the stamping column 13 is one fourth of the length of the small-diameter column part of the upper T-shaped column 7 and one half of the length of the small-diameter column part of the lower T-shaped column 10 respectively; four through holes 24 are annularly and equidistantly formed in the inner side of the edge of the top surface of the lower T-shaped column 10, and top ports of the four through holes 24 are respectively connected with cylinder body ports of four second oil cylinders 11; one end of a connecting column 6 is arranged in the middle of the end face of the top end of the upper T-shaped column 7, the other end of the connecting column 6 is connected with the push rod end of the external hydraulic oil cylinder, and die-casting power can be provided by connecting the other end of the connecting column 6 with the push rod end of the external hydraulic oil cylinder; the three die-casting holes 5 are arranged, the aperture sizes of the three die-casting holes 5 are different from each other, the three die-casting holes 5 are alternately arranged in the middle of the top surface of the U-shaped long plate 14 in a straight line shape, and the aperture sizes of the three die-casting holes 5 are respectively consistent with the diameter size of the punching column 13, the diameter size of the small-diameter column of the lower T-shaped column 10 and the diameter size of the small-diameter column of the upper T-shaped column 7 from left to right; the round supporting block 22 is slidably arranged in the top port of the round pipe 1, and the top surface of the round supporting block 22 is flush with the top port of the round pipe 1, so that a flat die-casting surface in contact with a pressing piece can be formed; the two guide sliding blocks 16 are symmetrically arranged at the top of the annular surface of the circular tube 1, the circular tube 1 is positioned at one end in the U-shaped long plate 14, and the inner diameter size circle of the circular tube 1 is larger than the aperture size of the die-casting hole 5, so that the moving stability of the connected U-shaped long plate 14 can be ensured; the end faces of the two ends of the traction sliding block 15 are mutually communicated through screw holes, and the screw holes are internally in threaded connection with the long screw rods 26, so that the effect of threaded connection between the traction sliding block 15 and the long screw rods 26 is achieved; the dragging slide block 15 is slidably mounted in the strip-shaped frame 2, the top surface of the dragging slide block 15 is connected with the middle position of the other end in the U-shaped long plate 14, and the moving dragging slide block 15 is convenient to drive the connected U-shaped long plate 14 to move; reset spring 19 is located between stopper 18 and the three- blade 20, and 19 one end of reset spring and three-blade 20 top intermediate position interconnect, the round support block 22 that can guarantee to connect gets back to initial position on 19 other ends and stopper 18 bottom surface interconnect, releases the die casting simultaneously from pipe 1 in.

When the die-casting die is used, the outer gas pore channel 25 is annularly arranged on the stamping column 13, and the inner gas pore channel 23 is annularly arranged on the lower T-shaped column 10, so that compressed gas during die-casting can be discharged, the condition that the inner wall of a die-casting piece is supported by the gas which cannot be discharged in a compression mode to deform is avoided, and the die-casting die is conveniently separated from a die-casting forming piece;

the second oil cylinder 11 group is operated to be in a contraction state, the punching column 13 connected through the second column hole 12 moves upwards along the small-diameter column body part of the lower T-shaped column 10, the small-diameter column body part of the lower T-shaped column 10 can be exposed to serve as a die-casting head structure part of a die-casting die, similarly, the lower T-shaped column 10 moves upwards along the small-diameter column body part of the upper T-shaped column 7 in the contraction state of the first oil cylinder 8, the small-diameter column body part of the T-shaped column 7 can be exposed to serve as the die-casting head structure part of the die-casting die, the function of conveniently replacing a die-casting head of the die-casting die is realized, meanwhile, the long screw 26 is driven by the operated motor 4 to rotate, the U-shaped long plate 14 connected through the driving slide block 15 moves leftwards, the die-casting hole 5 with the corresponding to the aperture specification can be positioned right;

the bottom of the part to be subjected to die-casting deformation on the pressing piece is in surface contact with the top of the round supporting block 22, and the square rod 17 between the bottom of the round supporting block 22 and the three-blade plate 20 is partially sleeved with the return spring 19, so that the stability of the part moving downwards due to the gradual die-casting deformation on the pressing piece can be ensured, and meanwhile, the elasticity of the return spring 19 can be utilized to be separated from the die through the die-cast pressing piece, so that the die-cast piece can be taken out conveniently.

The application has the advantages that:

1. the die-casting die has a reasonable structure, can discharge gas compressed during die-casting, avoids the situation that the inner wall of a die-casting piece is supported and deformed by the gas which can not be discharged through compression, and is convenient for separating the die-casting die from a die-casting formed piece;

2. the die-casting die is reasonable in structure, the function of conveniently replacing the die-casting head of the die-casting die is realized, meanwhile, the long screw 26 is driven by the running motor 4 to rotate, the U-shaped long plate 14 connected by the traction sliding block 15 is moved leftwards, the die-casting holes 5 with corresponding hole diameter specifications can be positioned right above the top port of the circular tube 1, the die-casting die is suitable for die-casting parts with three specifications, and the processing efficiency is improved;

3. this application is rational in infrastructure, can guarantee gradually on the casting die to die-cast deformation move down the stability of part, can utilize reset spring 19's elasticity to break away from through the casting die that the die-casting is good and the mould simultaneously, is convenient for take out the die casting.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a die casting die with exhaust structure which characterized in that: the die-casting die comprises a U-shaped long plate (14), a die-casting assembly, a replacing assembly and a bottom supporting assembly, wherein guide sliding grooves (3) are formed in the side walls of the two inner sides of the U-shaped long plate (14), and the guide sliding grooves (3) are mutually connected with guide sliding blocks (16) on the corresponding side in a sliding manner;

the die-casting component comprises a round pipe (1), a die-casting hole (5), an upper T-shaped column (7), a lower T-shaped column (10) and a stamping column (13), the top port of the circular tube (1) is contacted with the bottom port of the die-casting hole (5), the top port of the die-casting hole (5) is close to the bottom end face of the stamping column (13), the top end face of the stamping column (13) is provided with a second column hole (12), and the small-diameter cylinder part of the lower T-shaped cylinder (10) is arranged in the second cylinder hole (12) in a sliding way, a first column hole (9) is arranged in the middle of the top end surface of the lower T-shaped column (10), and the first column hole (9) is internally provided with a small-diameter column part of an upper T-shaped column (7) in a sliding way, the edges of the upper end face and the lower end face of the stamping column (13) are communicated with the corresponding parts of the upper end face and the lower end face of the lower T-shaped column (10) through an outer gas pore passage (25) which is distributed annularly and an inner gas pore passage (23) which is distributed annularly;

the replacement assembly comprises a motor (4), a first oil cylinder (8), a second oil cylinder (11), a long screw rod (26) and a traction sliding block (15), the motor (4) is installed at the middle position of one end face of a bar-shaped frame (2), the shaft end of the motor (4) is connected with one end face of the long screw rod (26), the long screw rod (26) is rotatably installed in the bar-shaped frame (2), the long screw rod (26) is connected with the traction sliding block (15) in a threaded manner, the first oil cylinders (8) are four, the annular equal distances of the first oil cylinders (8) are installed at the edge of the top end face of an upper T-shaped column (7), the push rod ends of the four first oil cylinders (8) are correspondingly connected with the edge of the top end face of a lower T-shaped column (10) respectively, the second oil cylinders (11) are four, and the annular equal distances of the four second oil cylinders (11) are installed at the inner side of the edge of the top end face of the lower T-shaped column (10), push rod ends of the four second oil cylinders (11) are respectively and correspondingly connected with the edge of the top end face of the stamping column (13);

the support bottom assembly comprises a square rod (17), a limiting block (18), a reset spring (19), a three-blade plate (20) and a round supporting block (22), the square rod (17) is located at the middle position in the round tube (1), the top end of the square rod (17) is installed at the middle position of the bottom of the round supporting block (22), the limiting block (18) is installed at the middle position of the square rod (17), the reset spring (19) is sleeved on the square rod (17), the three-blade plate (20) is installed in the end opening of the bottom of the round tube (1), and the middle part of the three-blade plate (20) is connected with the bottom part of the square rod (17) in a sliding mode through a square through hole (21).

2. A die casting mold having a vent structure as set forth in claim 1, wherein: the bottom end face of the upper T-shaped column (7), the bottom end face of the lower T-shaped column (10) and the bottom end face of the stamping column (13) are flush with each other, and the length of the stamping column (13) is one fourth of the length of the small-diameter column part of the upper T-shaped column (7) and one half of the length of the small-diameter column part of the lower T-shaped column (10).

3. A die casting mold having a vent structure as set forth in claim 1, wherein: four through holes (24) are opened to lower T type post (10) top surface edge inboard annular equidistance, and four through hole (24) top port is connected with the cylinder body port position of four second hydro-cylinders (11) respectively.

4. A die casting mold having a vent structure as set forth in claim 1, wherein: and one end of a connecting column (6) is arranged in the middle of the end surface of the top end of the upper T-shaped column (7), and the other end of the connecting column (6) is connected with the push rod end of an external hydraulic oil cylinder.

5. A die casting mold having a vent structure as set forth in claim 1, wherein: the three die-casting holes (5) are arranged, the aperture sizes of the three die-casting holes (5) are different from each other, the three die-casting holes (5) are alternately arranged in the middle of the top surface of the U-shaped long plate (14) in a straight line shape, and the aperture sizes of the three die-casting holes (5) are respectively consistent with the diameter size of the stamping column (13), the diameter size of the small-diameter column of the lower T-shaped column (10) and the diameter size of the small-diameter column of the upper T-shaped column (7) from left to right.

6. A die casting mold having a vent structure as set forth in claim 1, wherein: the round supporting block (22) is slidably mounted in the top port of the round pipe (1), and the top surface of the round supporting block (22) is flush with the top port of the round pipe (1).

7. A die casting mold having a vent structure as set forth in claim 1, wherein: the guide sliding block (16) is provided with two, and two the guide sliding block (16) is symmetrically installed at the top of the annular surface of the circular tube (1), the circular tube (1) is located at one end of the U-shaped long plate (14), and the inner diameter size circle of the circular tube (1) is larger than the aperture size of the die-casting hole (5).

8. A die casting mold having a vent structure as set forth in claim 1, wherein: the end faces of two ends of the traction sliding block (15) are communicated with each other through screw holes, and the screw holes are partially in threaded connection with the long screw rods (26).

9. A die casting mold having a vent structure as set forth in claim 1, wherein: the drawing sliding block (15) is slidably mounted in the bar-shaped frame (2), and the top surface of the drawing sliding block (15) is connected with the middle position of the other end in the U-shaped long plate (14).

10. A die casting mold having a vent structure as set forth in claim 1, wherein: reset spring (19) are located between stopper (18) and three-leaf plate (20), and reset spring (19) one end and three-leaf plate (20) top intermediate position interconnect, reset spring (19) other end and stopper (18) bottom surface interconnect.

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