CN111873284A

CN111873284A - One-step compression molding method of pure tetrafluoroethylene nozzle and special mold thereof

Info

Publication number: CN111873284A
Application number: CN202010643262.5A
Authority: CN
Inventors: 孙开平
Original assignee: Rugao Jiabai Plastic Products Co Ltd
Current assignee: Rugao Jiabai Plastic Products Co Ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2020-11-03

Abstract

The invention discloses a one-step compression molding method of a pure tetrafluoroethylene nozzle and a special die thereof, and relates to the technical field of production of pure tetrafluoroethylene nozzles. This a compression moulding method of pure tetrafluoroethylene nozzle and special mould thereof, the perforating rod stretches out until the perforating rod passes inside the lower mould, passes out the pole hole until the perforating rod, and the inside passageway that naturally forms of raw materials among the curing molding this moment should be provided with and do benefit to and make nozzle one time compression moulding, need not the later stage and drilling, is favorable to improving production efficiency, shortens production flow to reduction in production cost.

Description

One-step compression molding method of pure tetrafluoroethylene nozzle and special mold thereof

Technical Field

The invention relates to the technical field of pure tetrafluoroethylene nozzle production, in particular to a one-step compression molding method of a pure tetrafluoroethylene nozzle and a special mold thereof.

Background

Tetrafluoroethylene is mainly used in plastics and resin industries, is also an intermediate of hexaflumuron in pesticides, can be used as a raw material for manufacturing novel fire extinguishing agents and fog suppressants, can be stored in a fire extinguisher after being prepared with other materials to serve as a fire extinguishing agent, and can be sprayed out only by opening a nozzle of the fire extinguisher during use, thereby inhibiting and eliminating fire.

At present, the nozzle is produced in a compression molding mode, extra drilling operation is needed to be carried out on the nozzle after compression molding, the through hole is drilled in the nozzle, tetrafluoroethylene can be conveyed, the nozzle cannot be subjected to compression molding once, the processing flow is lengthened, and the production capacity cannot be improved while the production cost is improved.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a one-time compression molding method of a pure tetrafluoroethylene nozzle and a special die thereof, which solve the problems that the nozzle provided by the background technology adopts a compression molding mode in production, extra drilling operation is required after compression molding of the nozzle, through holes are drilled in the nozzle to convey tetrafluoroethylene, the nozzle cannot be subjected to one-time compression molding, the processing flow is prolonged, the production cost is improved, and the production capacity cannot be improved.

In order to achieve the purpose, the invention is realized by the following technical scheme: a special die for one-step compression molding of a pure tetrafluoroethylene nozzle comprises a bottom plate, an upper die and a plugging magnetic column, wherein the middle part of the surface of the bottom plate is provided with a lower die, and positioning columns penetrate through the periphery of the bottom of the lower die, a supporting bracket is arranged on the outer side of the lower die, a first hydraulic cylinder is fixed on the surface of the top of the supporting bracket, a push rod is connected with the bottom of the first hydraulic cylinder, a push plate is fixed at the bottom of the push rod, a telescopic pipe is arranged on the lower surface of the push plate, a spring is arranged in the telescopic pipe, the upper die is fixed at the bottom end of the telescopic pipe, the side surfaces of the periphery of the push plate are connected with a material cutting blade, a fixing bolt penetrates through the surface of the cutting blade, a perforating rod penetrates through the side surface of the lower die, the tail end of the perforating rod is connected with a second hydraulic cylinder, a rod outlet hole is formed in the other side surface of the lower die, the plugging magnetic column is arranged inside the rod outlet hole, and a limiting piece is arranged at the outer end of the plugging magnetic column.

Optionally, the positioning columns are symmetrically distributed about a vertical center line of the bottom plate, the positioning columns and the bottom plate are of an integrated structure, and the lower die is movably connected with the bottom plate through the positioning columns.

Optionally, the vertical central line of the push plate and the vertical central line of the lower die are overlapped, the push plate and the first hydraulic cylinder form a lifting structure through the push rod, and the upper die and the push plate form an elastic structure through the telescopic pipe and the spring.

Optionally, the blanking blade is rectangular, the inner surface of the blanking blade is attached to the outer surfaces of the upper die and the lower die, and the blanking blade is fixedly connected with the push plate through a fixing bolt.

Optionally, the piercing post forms a telescopic structure through a second hydraulic cylinder, the central axis of the piercing post and the central axis of the rod outlet hole are located on the same horizontal line, and the size of the outer opening of the piercing post is smaller than that of the inner opening of the rod outlet hole.

Optionally, the blocking magnetic column and the limiting piece are of an integrated structure, the outer opening structural size of the limiting piece is larger than the inner opening structural size of the rod outlet hole, and the blocking magnetic column is connected with the lower die in an adsorption mode through the rod outlet hole.

Optionally, the inner side surface of the plugging magnetic column is attached to the outer end surface of the piercing post, and the plugging magnetic column is in adsorption connection with the piercing post.

A one-time compression molding method of a pure tetrafluoroethylene nozzle comprises the following operation steps:

s1: settle the mould, place the bed die in the bottom plate surface, thereby the reference column on bottom plate surface runs through the bed die and fixes a position the bed die all around this moment to run through bed die one side with the perforating rod, place shutoff magnetic column inside out the pole hole again, avoid the raw materials to ooze.

S2: and (3) injecting materials, namely placing the raw materials melted into the colloid shape in the lower die until the raw materials are filled up and protrude out of the lower die.

S3: compression molding promotes the push rod through first pneumatic cylinder and makes the push pedal carry flexible pipe, go up the mould and push down until supreme mould lower surface and bed die top laminating, outstanding in the inside raw materials of bed die receive extrusion evenly distributed in the inside of last mould and bed die this moment to the raw materials makes the raw materials take place deformation when the solidification because of the restriction of pressure and last mould, the inside line of bed die.

S4: the rim charge cuts, after the upper die is attached to the lower die, the first hydraulic cylinder continues to apply thrust, the telescopic pipe shrinks at the moment, and the push plate carries the blanking blade to press down to cut off the raw materials oozed at the attachment part of the upper die and the lower die due to extrusion.

S5: and (4) perforating, pushing the perforating rod to extend through the second hydraulic cylinder until the perforating rod passes through the lower die, pushing the outer end of the perforating rod to abut against the blocking magnetic column to continue to extend until the perforating rod passes through the rod outlet hole, pushing the blocking magnetic column out from the inner part of the rod outlet hole, and naturally forming a channel in the raw material in the solidification molding at the moment.

S6: and (4) demolding, namely, the push rod is contracted through the first hydraulic cylinder to enable the upper mold to ascend away from the surface of the lower mold, the punch rod is contracted through the second hydraulic cylinder, and the molded nozzle can be taken out at the moment.

The invention provides a one-time compression molding method of a pure tetrafluoroethylene nozzle and a special mold thereof, which have the following beneficial effects:

1. this a compression molding method and special mould of pure tetrafluoroethylene nozzle, go up the mould and the bed die laminating back, promote the perforation pole through the second hydraulic cylinder and stretch out until the perforation pole passes inside the bed die, until the perforation pole passes a pole hole, the inside passageway that naturally forms of raw materials among the solidification forming this moment, should be provided with and do benefit to and make the nozzle once can compression molding, need not the later stage and drilling, be favorable to improving production efficiency, shorten production flow to reduction in production cost.

2. According to the one-step compression molding method of the pure tetrafluoroethylene nozzle and the special die thereof, after the upper die is attached to the lower die, the first hydraulic cylinder continues to apply thrust, the telescopic pipe shrinks at the moment, and the push plate carries the blanking blade to press down to cut off raw materials exuded at the attachment part of the upper die and the lower die due to extrusion, so that the nozzle edge after solidification is favorably ensured to be tidy, burrs are avoided, and later polishing operation is facilitated.

3. This a compression moulding method of pure tetrafluoroethylene nozzle and special mould thereof, the blank blade is the rectangle, and blank blade medial surface and last mould, the surface of bed die is laminated mutually, thereby be favorable to going up the mould, the raw materials that the bed die laminating department oozed because of the extrusion carries out comprehensive excision, avoid having the raw materials to remain, the blank blade is through fixing bolt and push pedal fixed connection moreover, later stage accessible is twisted off fixing bolt and is changed the maintenance to the blank blade, thereby make the blank blade keep the sharpness.

4. This a compression moulding method of pure tetrafluoroethylene nozzle and special mould thereof, before adding the raw materials to the bed die, need make the perforating rod run through bed die one side earlier, place the shutoff magnetic column in a pole hole inside again, thereby be favorable to avoiding the raw materials to ooze, and shutoff magnetic column is the integral structure with spacing piece, and the outer mouthful of structural dimension of spacing piece is greater than the interior mouthful structural dimension in a pole hole, can prevent that the shutoff magnetic column from submerging in a pole hole inside completely, avoid the shutoff magnetic column to stand out to the bed die inner wall and produce the interference to the nozzle shaping.

5. According to the one-step compression molding method of the pure tetrafluoroethylene nozzle and the special mold thereof, the lower mold is placed on the surface of the bottom plate, and the positioning columns on the surface of the bottom plate penetrate through the periphery of the lower mold to position and fix the lower mold, so that the upper mold and the lower mold can be conveniently and accurately attached, the lower mold can be conveniently detached in the later period, and the lower mold can be conveniently cleaned in the later period.

Drawings

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

FIG. 2 is a schematic top view of the base plate of the present invention;

FIG. 3 is a schematic view of the internal structure of the extension tube of the present invention;

FIG. 4 is a schematic top view of the push plate of the present invention;

FIG. 5 is an enlarged view of the structure at A in FIG. 1 according to the present invention.

In the figure: 1. a base plate; 2. a lower die; 3. a positioning column; 4. a support bracket; 5. a first hydraulic cylinder; 6. a push rod; 7. pushing the plate; 8. a telescopic pipe; 9. a spring; 10. an upper die; 11. a material cutting blade; 12. fixing the bolt; 13. a piercing post; 14. a second hydraulic cylinder; 15. a rod outlet hole; 16. plugging the magnetic column; 17. a limiting sheet.

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.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

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 to 5, the present invention provides a technical solution: a special die for one-step compression molding of a pure tetrafluoroethylene nozzle comprises a bottom plate 1, an upper die 10 and a plugging magnetic column 16, wherein a lower die 2 is arranged in the middle of the surface of the bottom plate 1, positioning columns 3 penetrate through the periphery of the bottom of the lower die 2, the positioning columns 3 are symmetrically distributed about the vertical central line of the bottom plate 1, the positioning columns 3 and the bottom plate 1 are of an integrated structure, the lower die 2 is movably connected with the bottom plate 1 through the positioning columns 3, the lower die 2 is placed on the surface of the bottom plate 1, and the positioning columns 3 on the surface of the bottom plate 1 penetrate through the periphery of the lower die 2 to position and fix the lower die 2, so that the upper die 10 and the lower die 2 are conveniently attached accurately, the lower die 2 is conveniently detached in the later stage, and the lower die 2 is;

the outer side of the lower die 2 is provided with a supporting bracket 4, the surface of the top of the supporting bracket 4 is fixed with a first hydraulic cylinder 5, the bottom of the first hydraulic cylinder 5 is connected with a push rod 6, the bottom of the push rod 6 is fixed with a push plate 7, the lower surface of the push plate 7 is provided with a telescopic pipe 8, the telescopic pipe 8 is internally provided with a spring 9, the upper die 10 is fixed at the bottom end of the telescopic pipe 8, the vertical central line of the push plate 7 and the vertical central line of the lower die 2 are superposed, the push plate 7 forms a lifting structure through the push rod 6 and the first hydraulic cylinder 5, the upper die 10 forms an elastic structure through the telescopic pipe 8, the spring 9 and the push plate 7, the peripheral side surfaces of the push plate 7 are connected with a material cutting blade 11, the surface of the material cutting blade 11 is penetrated with a fixing bolt 12, the material cutting blade 11 is rectangular, the inner surface of the material cutting blade 11 is jointed with the, the push rod 6 is pushed by the first hydraulic cylinder 5 to enable the push plate 7 to carry the telescopic pipe 8, the upper die 10 is pressed downwards until the lower surface of the upper die 10 is attached to the top of the lower die 2, at the moment, raw materials protruding out of the lower die 2 are extruded and uniformly distributed in the upper die 10 and the lower die 2, the raw materials are deformed while being solidified due to the limitation of pressure and the internal grains of the upper die 10 and the lower die 2, after the upper die 10 is attached to the lower die 2, the first hydraulic cylinder 5 continues to apply thrust, at the moment, the telescopic pipe 8 shrinks, the push plate 7 carries the cutting blade 11 to press downwards to cut off the raw materials seeped at the attachment part of the upper die 10 and the lower die 2 due to extrusion, the cutting blade 11 is rectangular, the inner side face of the cutting blade 11 is attached to the outer surfaces of the upper die 10 and the lower die 2, and therefore, the raw materials seeped at the attachment part of the upper die 10 and the lower, raw material residue is avoided, the cutting blade 11 is fixedly connected with the push plate 7 through the fixing bolt 12, and the cutting blade 11 can be replaced and maintained by unscrewing the fixing bolt 12 at the later stage, so that the cutting blade 11 keeps sharpness;

a piercing post 13 penetrates through the side surface of the lower die 2, the end of the piercing post 13 is connected with a second hydraulic cylinder 14, the other side surface of the lower die 2 is provided with a rod outlet hole 15, the piercing post 13 forms a telescopic structure through the second hydraulic cylinder 14, the central axis of the piercing post 13 and the central axis of the rod outlet hole 15 are positioned on a horizontal line, the size of an outer opening of the piercing post 13 is smaller than that of an inner opening of the rod outlet hole 15, a blocking magnetic post 16 is arranged inside the rod outlet hole 15, the outer end of the blocking magnetic post 16 is provided with a limiting sheet 17, the blocking magnetic post 16 and the limiting sheet 17 are in an integrated structure, the size of the outer opening of the limiting sheet 17 is larger than that of the inner opening of the rod outlet hole 15, the blocking magnetic post 16 is in adsorption connection with the lower die 2 through the rod outlet hole 15, the inner side surface of the blocking magnetic post 16 is attached to the outer end surface of the piercing post 13, the blocking magnetic post 16 is in adsorption connection with, the punching rod 13 needs to penetrate one side of the lower die 2, then the plugging magnetic column 16 is placed inside the rod outlet hole 15, so that the raw material seepage is avoided, the plugging magnetic column 16 and the limiting piece 17 are in an integrated structure, the structural size of an outer opening of the limiting piece 17 is larger than that of an inner opening of the rod outlet hole 15, the plugging magnetic column 16 can be prevented from completely immersing inside the rod outlet hole 15, the plugging magnetic column 16 is prevented from protruding to the inner wall of the lower die 2 to interfere in the raw material curing process, the second hydraulic cylinder 14 is used for pushing the punching rod 13 to extend out until the punching rod 13 penetrates through the lower die 2 until the punching rod 13 penetrates through the rod outlet hole 15, at the moment, a channel is naturally formed inside the raw material during curing molding, the arrangement is beneficial to forming a nozzle through one-step compression molding, the later-stage drilling is not needed, the production efficiency is improved, the production process is shortened, the production cost is reduced, and the punching rod 13 can plug the magnetic column 16 to push out from the interior of the rod outlet, the plugging magnetic column 16 is connected with the piercing post 13 in an adsorption manner, so that the plugging magnetic column 16 can be prevented from falling off.

s1: the die is arranged, the lower die 2 is placed on the surface of the bottom plate 1, the positioning columns 3 on the surface of the bottom plate 1 penetrate through the periphery of the lower die 2 to position and fix the lower die 2, the perforating rods 13 penetrate through one side of the lower die 2, and the plugging magnetic columns 16 are placed inside the rod outlet holes 15 to prevent raw materials from seeping out.

S2: and (3) injecting materials, namely placing the raw materials melted into the colloid shape in the lower die 2 until the raw materials are filled up and protrude out of the lower die 2.

S3: compression molding, promote push rod 6 through first pneumatic cylinder 5 and make push pedal 7 carry flexible pipe 8, go up mould 10 and push down and go up mould 10 lower surface and 2 top laminatings of bed die, outstanding this moment receive extrusion evenly distributed in the inside of last mould 10 and bed die 2 in 2 inside raw materials of bed die to the raw materials takes place deformation when the solidification because of the restriction of pressure and

last mould

10, 2 inside lines of bed die.

S4: and (3) cutting the rim charge, after the upper die 10 is attached to the lower die 2, continuously applying thrust to the first hydraulic cylinder 5, shrinking the telescopic pipe 8 at the moment, and downwards pressing the joint of the upper die 10 and the lower die 2 by the push plate 7 with the material cutting blade 11 to cut off the raw materials exuded at the joint of the upper die 10 and the lower die 2 due to extrusion.

S5: and (3) punching, pushing a punching rod 13 to extend by a second hydraulic cylinder 14 until the punching rod 13 penetrates through the interior of the lower die 2, wherein the outer end of the punching rod 13 abuts against a blocking magnetic column 16 to continue extending until the punching rod 13 penetrates through a rod outlet hole 15, and the blocking magnetic column 16 is pushed out from the interior of the rod outlet hole 15, and at the moment, a channel is naturally formed in the solidified and molded raw material.

S6: and (3) demolding, namely, retracting the push rod 6 through the first hydraulic cylinder 5 to lift the upper mold 10 away from the surface of the lower mold 2, and then retracting the perforated rod 13 through the second hydraulic cylinder 14, so that the molded nozzle can be taken out.

In conclusion, the primary compression molding method of the pure tetrafluoroethylene nozzle and the special mold thereof are used, firstly, the lower mold 2 is placed on the surface of the bottom plate 1, the positioning column 3 on the surface of the bottom plate 1 penetrates through the periphery of the lower mold 2 to position and fix the lower mold 2, the punching rod 13 penetrates through one side of the lower mold 2, then the blocking magnetic column 16 is placed in the rod outlet hole 15, so that the leakage of raw materials is avoided, the blocking magnetic column 16 is connected with the lower mold 2 inserted into the rod outlet hole 15 in an adsorption manner so as to avoid the dropping of the blocking magnetic column 16, then the raw materials melted into colloid are placed in the lower mold 2 until the raw materials are filled and protrude out of the lower mold 2, the push rod 6 is pushed by the first hydraulic cylinder 5 to enable the push plate 7 to carry the telescopic pipe 8, the upper mold 10 is pressed down until the lower surface of the upper mold 10 is attached to the top of the lower mold 2, and the raw materials protruding out of the lower mold 2 are uniformly, and the raw materials deform while solidifying because of the restriction of the pressure and the inner lines of the upper die 10 and the lower die 2, then after the upper die 10 is jointed with the lower die 2, the first hydraulic cylinder 5 continues to apply thrust, at the moment, the extension tube 8 and the spring 9 shrink, the push plate 7 carries the cutting blade 11 to press down to cut off the raw materials seeped out at the joint of the upper die 10 and the lower die 2 because of extrusion, thereby being beneficial to ensuring the tidiness of the solidified nozzle edge, avoiding the generation of burrs and facilitating the later polishing operation, then the second hydraulic cylinder 14 pushes the perforated rod 13 to stretch out until the perforated rod 13 passes through the inner part of the lower die 2, at the moment, the outer end of the perforated rod 13 supports the blocking magnetic column 16 to continue to stretch out until the perforated rod 13 passes through the rod outlet 15, and the blocking magnetic column 16 is pushed out from the inner part of the rod outlet 15, at the moment, a channel is naturally, this be provided with and do benefit to and make the nozzle once can compression molding, need not the later stage and be driling, be favorable to improving production efficiency, shorten production flow, and reduction in production cost, and because perforated stick 13 passes out pole hole 15 can support shutoff magnetic column 16 and make it release from a pole hole 15 is inside, and be absorption connection between shutoff magnetic column 16 and the perforated stick 13, can prevent that shutoff magnetic column 16 from droing, it makes last mould 10 rise through first pneumatic cylinder 5 shrink push rod 6 and leaves 2 surfaces of bed die, rethread second pneumatic cylinder 14 shrink perforated stick 13, can take out the nozzle after the shaping this moment.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims

1. A one-time compression molding method of a pure tetrafluoroethylene nozzle is characterized by comprising the following steps: the method comprises the following operation steps:

s1: the method comprises the steps of arranging a mold, placing a lower mold (2) on the surface of a bottom plate (1), enabling a positioning column (3) on the surface of the bottom plate (1) to penetrate through the periphery of the lower mold (2) to position and fix the lower mold (2), enabling a punching rod (13) to penetrate through one side of the lower mold (2), and then placing a plugging magnetic column (16) inside a rod outlet hole (15) to avoid raw material seepage.

S2: and (3) injecting materials, namely placing the raw materials melted into the colloid shape in the lower die (2) until the raw materials are filled and protrude out of the lower die (2).

S3: compression molding, promote push rod (6) through first pneumatic cylinder (5) and make push pedal (7) carry flexible pipe (8), go up mould (10) and push down until supreme mould (10) lower surface and bed die (2) top laminating, outstanding the raw materials in bed die (2) inside receive extrusion evenly distributed in the inside of going up mould (10) and bed die (2) this moment, and the raw materials because of pressure and last mould (10), the restriction of bed die (2) inside line makes the raw materials take place deformation in the solidification.

S4: the rim charge is cut, after the upper die (10) is attached to the lower die (2), the first hydraulic cylinder (5) continues to apply thrust, the telescopic pipe (8) is contracted at the moment, and the push plate (7) carries the material cutting blade (11) to press down to cut off the raw materials oozed out at the attachment part of the upper die (10) and the lower die (2) due to extrusion.

S5: and (3) perforating, namely pushing a perforating rod (13) to extend out through a second hydraulic cylinder (14) until the perforating rod (13) penetrates through the lower die (2), wherein the outer end of the perforating rod (13) abuts against a blocking magnetic column (16) to continue to extend out until the perforating rod (13) penetrates through a rod outlet hole (15), the blocking magnetic column (16) is pushed out from the inside of the rod outlet hole (15), and a channel is naturally formed in the raw material during curing and forming.

S6: and (3) demolding, namely, retracting the push rod (6) through the first hydraulic cylinder (5) to enable the upper mold (10) to ascend away from the surface of the lower mold (2), and then retracting the perforated rod (13) through the second hydraulic cylinder (14), so that the molded nozzle can be taken out.

2. The utility model provides a pure tetrafluoroethylene nozzle's a compression moulding special mould, includes bottom plate (1), goes up mould (10) and shutoff magnetic column (16), its characterized in that: a lower die (2) is arranged in the middle of the surface of the bottom plate (1), positioning columns (3) penetrate through the periphery of the bottom of the lower die (2), a supporting bracket (4) is arranged on the outer side of the lower die (2), a first hydraulic cylinder (5) is fixed on the surface of the top of the supporting bracket (4), a push rod (6) is connected to the bottom of the first hydraulic cylinder (5), a push plate (7) is fixed to the bottom of the push rod (6), a telescopic pipe (8) is arranged on the lower surface of the push plate (7), a spring (9) is arranged inside the telescopic pipe (8), an upper die (10) is fixed to the bottom end of the telescopic pipe (8), cutting blades (11) are connected to the peripheral side surfaces of the push plate (7), a fixing bolt (12) penetrates through the surface of each cutting blade (11), a perforating rod (13) penetrates through the side surface of the lower die (2), and a second hydraulic cylinder, a rod outlet hole (15) is formed in the other side surface of the lower die (2), the plugging magnetic column (16) is arranged inside the rod outlet hole (15), and a limiting piece (17) is arranged at the outer end of the plugging magnetic column (16).

3. The special die for one-time compression molding of the pure tetrafluoroethylene nozzle as claimed in claim 2, wherein: the positioning columns (3) are symmetrically distributed about a vertical center line of the bottom plate (1), the positioning columns (3) and the bottom plate (1) are of an integrated structure, and the lower die (2) is movably connected with the bottom plate (1) through the positioning columns (3).

4. The special die for one-time compression molding of the pure tetrafluoroethylene nozzle as claimed in claim 2, wherein: the vertical center line of push pedal (7) and the vertical center line of lower mould (2) coincide each other, and push pedal (7) pass through and constitute elevation structure between push rod (6) and first pneumatic cylinder (5), and go up mould (10) and constitute elastic construction through extending between pipe (8), spring (9) and push pedal (7) moreover.

5. The special die for one-time compression molding of the pure tetrafluoroethylene nozzle as claimed in claim 2, wherein: blank blade (11) are the rectangle form, and the surface of blank blade (11) internal surface and last mould (10), bed die (2) is laminated mutually, and blank blade (11) are through fixing bolt (12) and push pedal (7) fixed connection moreover.

6. The special die for one-time compression molding of the pure tetrafluoroethylene nozzle as claimed in claim 2, wherein: the perforating rod (13) forms a telescopic structure through the second hydraulic cylinder (14), the central axis of the perforating rod (13) and the central axis of the rod outlet hole (15) are positioned on the same horizontal line, and the size of an outer opening of the perforating rod (13) is smaller than that of an inner opening of the rod outlet hole (15).

7. The special die for one-time compression molding of the pure tetrafluoroethylene nozzle as claimed in claim 2, wherein: the blocking magnetic column (16) and the limiting sheet (17) are of an integrated structure, the outer opening structural size of the limiting sheet (17) is larger than the inner opening structural size of the rod outlet hole (15), and the blocking magnetic column (16) is connected with the lower die (2) in an adsorption mode through the rod outlet hole (15).

8. The special die for one-time compression molding of the pure tetrafluoroethylene nozzle as claimed in claim 2, wherein: the inner side surface of the plugging magnetic column (16) is attached to the outer end surface of the perforated rod (13), and the plugging magnetic column (16) is in adsorption connection with the perforated rod (13).