CN202147384U

CN202147384U - Long-service life extrusion head and automatic extrusion system comprising same

Info

Publication number: CN202147384U
Application number: CN201120272685U
Authority: CN
Inventors: 王永军; 康树峰; 周和平
Original assignee: Shenzhen Woer Heat Shrinkable Material Co Ltd
Current assignee: Shenzhen Woer Heat Shrinkable Material Co Ltd
Priority date: 2011-07-22
Filing date: 2011-07-22
Publication date: 2012-02-22
Anticipated expiration: 2021-07-22

Abstract

The utility model discloses a long-service life extrusion head which comprises a mouth die, an outer die, an inner die, a division body and a connecting body, wherein the inner die consists of an outer mandril and an inner mandril, a die hole is arranged on the outer mandril, the inner mandril is provided with a shaping part, an extrusion part and a shaft part which are connected in sequence, an extrusion slot is arranged at the free end of the shaft part, an airflow hole is arranged on the inner mandril, a central hole is arranged on a division frame, a thread regulating piece is arranged in a threaded hole, a frustum part is arranged at the tail end of the thread regulating piece, an air inlet hole is arranged on the thread regulating piece, the inner mandril is arranged in the die hole of the outer mandril and the central hole of the division frame, the frustum part extrudes the extrusion slot of the inner mandril, and the air inlet hole is communicated with the airflow hole of the inner mandril. In the utility model, the thread regulating piece is utilized to regulate the distance between the inner mandril of the inner die and the inner wall of a cavity of the outer die, so that the service life is prolonged, and different specifications of pipes can be produced. The utility model further provides an automatic extrusion system which comprises a wall thickness detector, a servo motor, a wall thickness regulation controller and the long-service life extrusion head, wherein the servo motor is connected with the thread regulating piece.

Description

A kind of high life extruder head and comprise the automatic extrusion system of this extruder head

Technical field

The utility model relates to a kind of extruder head of extruder, relates in particular to a kind of high life extruder head.

Background technology

See also Fig. 1, the extruder head of pipe extruders such as the traditional hot draw comprises external mold 20 ' and internal mold 30 '.External mold 20 ' is provided with die cavity 21 '.Internal mold 30 ' has the press section 31 ' and setting section 32 ' of frustum.Internal mold 30 ' is located in the cavity 21 ' of external mold 20 '; Be formed with the inwall of cavity 21 ' and melt materials flow road 211 '; Setting section 32 ' cavity 21 ' inwall adjacent thereto is formed with typing groove 212 ', and when extruding, the melting feed stream is through melting materials flow road 211 ' and typing in typing groove 212 '.

Yet; The melting raw material in melting materials flow road 211 ' in the process of flowing particularly when melting materials flow road 211 ' and narrow down; Become big to the press section of internal mold 30 ' 31 ' and with press section 31 ' contiguous die cavity 21 ' inwall extruding force, cause the contiguous die cavity 21 ' inner wall abrasion of press section 31 ' and press section 31 ' serious, the tubing thickness of extruding after may wear to a certain degree increases; Cause the requirement that falls short of specifications, at this moment just will change extruder head.

Therefore, press for a kind of high life extruder head and solve the problems referred to above.

The utility model content

The automatic extrusion system that the purpose of the utility model is that a kind of high life extruder head is provided and comprises this extruder head.

For realizing above-mentioned purpose, the utility model provides a kind of high life extruder head, comprises a mouthful mould, external mold, internal mold, branch fluid and connector; External mold offers die cavity, and internal mold is located in this die cavity, this minute fluid have the shunting frame and divide flow cone; Mouth mould, external mold, branch fluid, connector are fixedly connected sequentially, and internal mold comprises outer mandrel and inner spindle, and outer mandrel is provided with nib; Inner spindle has setting section, press section and the axial region that connects successively, and the free end of axial region offers squeezing groove, and inner spindle offers the airflow hole of the squeezing groove that runs through setting section, press section to axial region; The centre bore that shunting is set up screwed hole and is communicated with screwed hole is provided with screw adjustments in the screwed hole, the screw adjustments end is provided with frustum portion; Screw adjustments is provided with blowhole; Inner spindle is located at the nib of outer mandrel and is shunted in the centre bore of frame, the squeezing groove of frustum portion extruding inner spindle, and blowhole is communicated with the airflow hole of this inner spindle.

Because inner spindle can make the materials flow road that melts of this part too narrow down too forward; The tube material and tube wall attenuation that this can cause extruding and the requirement that falls short of specifications; Be the situation of avoiding the screw adjustments accommodative excess that inner spindle can not be adjusted back too forward, take following dual mode:

First kind of mode, the axial region of inner spindle has protruded out the blocking part, and the nib inwall place of outer mandrel offers spring eye, and spring is installed in the spring eye, and spring is placed on the axial region of inner spindle, and spring one end is resisted against on the blocking part.

The second way; Offer a spring accepting hole at a minute fluid, the spring accepting hole is communicated with the centre bore that divides fluid, contains a spring in the spring accepting hole; This spring one end is connected with said inner spindle is terminal, and the spring other end is fixed with the shunting frame in the spring accepting hole.

The melting raw material is taked following three kinds of modes from leaking material between inner spindle 32 and nib 312 inwalls when avoiding extruding:

First kind of mode all offers storage tank on the nib inwall of the outer surface of the axial region of inner spindle and outer mandrel, is provided with a sealing ring in two storage tanks, and this sealing effectiveness is best.

The second way, the outer surface of the axial region of inner spindle offers storage tank, is provided with sealing ring in the storage tank.

The third mode offers storage tank on the nib inwall of outer mandrel, is provided with sealing ring in the storage tank.

Further, the squeezing groove inwall of inner spindle has protruded out protuberance, when screw adjustments moves down, and the frustum portion of screw adjustments meeting crush lobes, thereby convenient the adjusting.

Further, external mold is integrally formed with mouthful mould.

Further, the external mold end is provided with connecting cylinder, and the free-ended inwall of connecting cylinder place has internal thread, and a mouthful mould and a mouthful moulded board are installed in the connecting cylinder from inside to outside successively, and the outside wall surface of mouthful moulded board has external screw thread to be fixedly connected with the internal thread of connecting cylinder.When extruding the product of different size, the mouth mould of changing different size gets final product.

Further, connecting cylinder is provided with screw hole, is provided with adjustment screw in the screw hole, the inclined to one side wall of adjustment screw scalable.

Further, external mold is divided into the anterior and external mold rear portion of external mold by integral body, and external mold is anterior to be fixed together through screw with the external mold rear portion.The external mold front portion is replaceable, thereby can be anterior according to the external mold that tubing thickness replacing die cavity, mouthful mould vary in size, to realize the production demand of different size tubing.

Further; External mold is provided with the external mold fixing hole; Divide the shunting frame of fluid to be provided with branch fluid fixing hole, connector is provided with the connector fixing hole, through screw penetrate this external mold fixing hole, divide the fluid fixing hole, the connector fixing hole with external mold, divide fluid and connector to be fixed together.

Further, the screw adjustments free end is provided with micrometer.Can predict the amplitude of accommodation of screw adjustments by this micrometer, and then predict the distance that inner spindle is advanced or retreated.

As stated, the utility model high life extruder head comprises a mouthful mould, external mold, internal mold, branch fluid, screw adjustments and connector, and screw adjustments moves down in the screwed hole of shunting frame through external screw thread; In the process that moves down; The squeezing groove of the frustum portion extruding inner spindle of screw adjustments forces inner spindle to move forward, in the process that inner spindle moves forward; Gap between the press section on the inner spindle and the mould intracavity wall of external mold is promptly melted the materials flow road and is narrowed down until recovering the primary clearance size; And then can continue to use, avoid changing extruder head, thereby improved service life.

In addition; Because the width that melts the materials flow road directly has influence on the thickness of extruding pipe material; So the utility model high life extruder head utilizes screw adjustments to regulate the distance of mould intracavity wall of inner spindle and the external mold of internal mold; That is melt the width in materials flow road, and utilize the width that melts the materials flow road to produce the tubing of different size.

The utility model also provides a kind of automatic extrusion system; This automatic extrusion system comprises instrument for detecting wall thickness, servomotor, wall thickness adjustment controller and above-mentioned high life extruder head; This servomotor connects the screw adjustments of high life extruder head; Instrument for detecting wall thickness is passed to wall thickness adjustment controller with data detection signal, and wall thickness adjustment controller sends tuningout wall signal and gives servomotor.

Further, said tuningout wall signal is for offering servomotor voltage time section.

Instrument for detecting wall thickness detects the tubing thickness of extruding in real time; And data detection signal is passed to wall thickness adjustment controller, wall thickness adjustment controller is with this data-signal and typical set value check and correction, if wall thickness becomes greatly; Then send tuningout wall signal and give servomotor; This tuningout wall signal can be and offers servomotor voltage time section, and servomotor work and regulate screw adjustments in this time period makes the narrowed width of melting the materials flow road through screw adjustments; Recover normal condition until the tube wall thickness of producing, thereby also can realize automated production through regulating.

Description of drawings

Fig. 1 is the cross-sectional view of prior art extruder head.

Fig. 2 is the cross-sectional view of high life extruder head first embodiment.

Fig. 3 is the cross-sectional view of high life extruder head second embodiment.

Fig. 4 is the cross-sectional view of high life extruder head the 3rd embodiment.

Each description of reference numerals is following among the figure:

Mouth mould 10 typing holes 11

111 mouthfuls of mould frustums of typing circular hole hole 112

Typing groove 113 external molds 20

Die cavity 21 melts materials flow road 211

External mold fixing hole 22 connecting cylinders 23

Screw hole 231 adjustment screw 232

Mouth moulded board 24 internal molds 30

Outer mandrel 31 frustum press sections 311

Nib 312 spring eyes 313

Inner spindle 32 setting sections 321

Press section 322 axial regions 323

Squeezing groove 324 airflow holes 325

Blocking part 326 protuberances 327

Connecting portion 33 through holes 331

Divide fluid 40 shunting framves 41

Screwed hole 411 centre bores 412

413 fens fluid fixing holes 414 of splitter box

Screw adjustments 50 frustum portions 51

Blowhole 52 connectors 60

Connect body 61 connector fixing holes 611

Tube portion 62 screws 60

Sealing ring 80 springs 90

The specific embodiment

By the technology contents, the structural feature that specify the utility model, realized purpose and effect, know clearly below in conjunction with embodiment and conjunction with figs. and give explanation.

See also Fig. 1, first embodiment that it has disclosed the utility model high life extruder head comprises mouthful mould 10, external mold 20, internal mold 30, divides fluid 40, screw adjustments 50 and connector 60.For ease of explanation, before stipulating in this manual to extrude the direction of advancing and be with product.

Mouth mould 10 is circular, and its center offers typing hole 11 in the past backward, and these typing hole 11 front ends are the circular hole 111 of finalizing the design, and these typing 11 rear ends, hole are outward-dipping backward mouth mould frustum hole 112.

It is round table-like that external mold 20 roughly is, and its center offers die cavity 21 in the past backward, and this die cavity 21 broadens in the past backward gradually.External mold 20 offers the external mold fixing hole 22 that in the past runs through backward.

In the present embodiment; Mouth mould 10 is integrally formed with external mold 20; Mould frustum hole 211 is communicated with outside mouth mould frustum hole 112 in the typing hole 11 of mouthful mould 10 and the die cavity 21 of external mold 20, and the inwall in mouth mould frustum hole 112 and the inwall in external mold frustum hole 211 are connected smoothly.

Internal mold 30 comprises outer mandrel 31 and inner spindle 32.Outer mandrel 31 roughly is the circular shaft shape, the frustum press section 311 of front end for broaden gradually backward in the past.Offer the nib 312 that in the past runs through backward on the outer mandrel 31.Inner spindle 32 roughly is the circular shaft shape; Be the columned setting section 321 that connects successively, the press section 322 and the axial region 323 that broaden gradually backward and be frustum in the past to the back-end from front end; Axial region 323 free ends are provided with the squeezing groove 324 that narrows down gradually from outside to inside, and also width is consistent up and down for the shape of squeezing groove 324.The central axis place of inner spindle 32 offers the airflow hole 325 in the squeezing groove 324 that runs through setting section 321, press section 322 to axial region 323.

In the present embodiment, the outer mandrel of internal mold 30 31 is connected with external mold 20 through some connecting portions 33, and outer mandrel 31, connecting portion 33, external mold 20 are integrally formed, are formed with through hole 331 between the adjacent connecting portion 33.Certainly; Internal mold 30 is not limited thereto in the fixed form of the utility model high life extruder head; Also can be connected fixing with shunting frame 40 through the outer mandrel 31 of internal mold 30; Connected mode comprises that outer mandrel 30 is connected with shunting frame 40 integrally formed modes, perhaps through mandrel 31 rear ends outside the thread connecting mode that external screw thread, shunting frame 40 centers be provided with internal thread hole is set and fixes.

Divide fluid 40 to have shunting frame 41 and branch flow cone 42.Shunting frame 41 is discoideus, and the peripheral region of shunting frame 41 offers a screwed hole 411 from outside to inside, and shunting frame 41 centers offer the centre bore 412 that is communicated with screwed hole 411 in the past backward.The middle part of shunting frame 41 offers some splitter boxs 413.Also offer branch fluid fixing hole 414 on the shunting frame 41.Dividing flow cone 42 to be protruded out by shunting frame 41 middle parts forms.

Screw adjustments 50 is the circular shaft shape roughly, and periphery is provided with external screw thread, and end is provided with frustum portion 51.Screw adjustments 50 centers offer the blowhole 52 that runs through screw adjustments 50 vertically.

Connector 60 has body of connection 61 and tube portion 62.Connect on the body 61 and offer connector fixing hole 611.

The utility model high life extruder head is when assembling; Penetrate the external mold fixing hole 22 of external mold 20, the branch fluid fixing hole 414 that divides fluid 40 and the connector fixing hole 611 of connector 60 through screw 70, thereby external mold 20, branch fluid 40 are fixed together with connector 60.

Internal mold 30 is located in the die cavity 21, and the inner spindle 32 of internal mold 30 is packed in the centre bore 412 of nib 312 and shunting frame 40 of outer mandrel 31, the press section 321 of inner spindle 32 and frustum press section 311 smooth connections of outer mandrel 31.In the die cavity 21 of external mold 20, be formed with between internal mold 30 and the external mold 20 and melt materials flow road 211.The setting section 321 of inner spindle 32 is positioned at the typing hole 11 of mouthful mould 10, thereby in the typing circular hole 111 in typing hole 11, is formed with typing groove 113 between the inwall of setting section 321 and typing circular hole 111.

Divide in the chamber of the tube portion 62 that the branch flow cone 42 of fluid 40 is located at connector 60; The through hole 331 of the tube chamber of the tube portion 62 of connector 60, the splitter box 413 that divides fluid 40, connecting portion 33 is communicated with the materials flow road 211 that melts between external mold 20, the internal mold 30 successively, constitutes the passage that melts the material Extrusion Flow.

Screw adjustments 50 is packed into through external screw thread in the screwed hole 411 of branch fluid 40, and its frustum portion 51 is supporting with the squeezing groove 324 of inner spindle 32.The blowhole 52 of screw adjustments 50 is communicated with the airflow hole 325 of internal mold 30, constitutes the gas channel of inflation.

The utility model high life extruder head is when using; The melting raw material is in the tube chamber of the tube portion 62 of extruder entering connector 60; The melting raw material gets in the splitter box 413 of shunting frame 41 after branch flow cone 42 shuntings of minute fluid 40; Through the through hole 331 of connecting portion 33, entering external mold 20 melts in the materials flow road 211 with internal mold 30, and moulding in typing groove 113.

The melting raw material in melting materials flow road 211 process of flowing particularly when melting materials flow road 211 and narrow down; Become big to the press section 322 of inner spindle 32 and with press section 322 contiguous die cavity 21 inwall extruding forces; Time has been grown; Press section 322 serious wearing and tearing can occur with press section 322 contiguous die cavity 21 inwalls, causes press section 322 promptly to melt materials flow road 211 with press section 322 contiguous die cavity 21 inwall gaps and broadens, along with the increase of wearing and tearing; It is more and more wideer to melt materials flow road 211, at this moment regulates screw adjustments 50.

Screw adjustments 50 moves down in the screwed hole 411 of shunting frame 40 through external screw thread, in the process that moves down, and the squeezing groove 324 of the frustum portion 51 extruding inner spindle 32 of screw adjustments 50; Force inner spindle 32 to move forward; In the process that inner spindle 32 moves forward, the gap between die cavity 21 inwalls of press section 322 on the inner spindle 32 and external mold 20 is promptly melted materials flow road 211 and is narrowed down until recovery primary clearance size, and then can continue to use; Avoid changing extruder head, thereby improved service life.

Further; Because inner spindle 32 is located in the nib 312 of outer mandrel 31; The melting raw material is from leaking material between inner spindle 32 and nib 312 inwalls when avoiding extruding, and the outer surface of the axial region 323 of inner spindle 32 offers storage tank 3231, establishes capable sealing ring 80 in this storage tank 3231.Perhaps, offer storage tank 3231 on nib 312 inwalls of mandrel 31 outside, sealing ring 80 is located in this storage tank 3231.Also perhaps, all offer storage tank 3231 on nib 312 inwalls of the outer surface of the axial region 323 of inner spindle 32 and outer mandrel 31, sealing ring 80 is located in this two storage tank 3231, and this can make sealing effectiveness better, and this also is the optimal way of present embodiment.

Further, be the situation of avoiding screw adjustments 50 accommodative excesses that inner spindle 32 can not be adjusted back too forward, inner spindle 32 can make the materials flow road 211 that melts of this part too narrow down too forward; The tube material and tube wall attenuation that this can cause extruding and the requirement that falls short of specifications; For avoiding this kind situation, the nib 31 inwall places of outer mandrel 31 offer spring eye 313, and the axial region 323 of inner spindle 32 has protruded out blocking part 326; Blocking part 326 is positioned at spring eye 313; Spring 90 is installed in the spring eye 313, and this spring 90 is placed on the axial region 323 of inner spindle 32, and these spring 90 1 ends are resisted against on the blocking part 326.During initial setting up, spring 90 can be set to not take place elastic deformation, and when inner spindle 32 moved forward under the effect of screw adjustments 50, this moment, spring 90 received keeping out of blocking part 326 to be in compressive state.If inner spindle 32 too moves forward; Can oppositely regulate screw adjustments 50; Move on the screw adjustments 50; Thereby frustum portion 51 also separates with moving on the screw adjustments 50 with squeezing groove 324, and inner spindle 32 just acted at the elastic-restoring force of spring 90 and moved after accomplish blocking part 326 this moment, thus the problem that can not move backward during shifting state before can avoiding inner spindle 32 too.

In fact, be the situation of avoiding screw adjustments 50 accommodative excesses that inner spindle 32 can not be adjusted back too forward, can also have other modes to accomplish; For example; On minute fluid 40, offer a spring accepting hole, this spring accepting hole is communicated with the centre bore that divides fluid 40, contains a spring in the spring accepting hole; This spring one end and 32 terminal connections of inner spindle, the spring other end is fixed with the shunting frame in the spring accepting hole.During initial setting up; Elastic deformation can not take place in spring, and inner spindle 32 moves forward and drives the elastic deformation that stretching takes place spring, oppositely regulates screw adjustments 50; Move on the screw adjustments 50; Thereby frustum portion 51 also separates with moving on the screw adjustments 50 with squeezing groove 324, and inner spindle 32 just acted at the elastic-restoring force of spring and moved after inner spindle 32 pulled backwards are accomplished this moment, thus the problem that can not move backward during shifting state before can avoiding inner spindle 32 too.

Further, for controlling the forward travel distance of inner spindle 32 better, screw adjustments 50 free ends are provided with micrometer, can predict the amplitude of accommodation of screw adjustments 50 by this micrometer, and then predict the distance that inner spindle 32 is advanced or retreated.

Further, squeezing groove 324 inwalls of inner spindle 32 have protruded out protuberance 327, when screw adjustments 50 moves down, and the frustum portion 51 meeting crush lobes 327 of screw adjustments 50, thereby convenient the adjusting.

See also Fig. 2; It has disclosed second embodiment of the utility model high life extruder head; This embodiment and first embodiment are similar, and its difference is: mouthful mould 10 is non-integrally formed with external mold 20, and a mouthful mould 10 is independent of external mold 20; External mold 20 ends are provided with connecting cylinder 23; These connecting cylinder 23 free-ended inwall places have internal thread, and a mouthful mould 10 and a mouthful moulded board 24 are installed in this connecting cylinder 23 from inside to outside successively, and the outside wall surface of this mouthful moulded board 24 has external screw thread and is fixedly connected with the internal thread with connecting cylinder 23.Connecting cylinder 23 is provided with screw hole 231, and screw hole 231 is provided with adjustment screw 232, these adjustment screw 232 counterpart moulds 10 tuningout walls.

The mouth mould 10 of the replaceable different size of present embodiment is realized the products of different specifications requirement.

See also Fig. 3; It has disclosed the 3rd embodiment of the utility model high life extruder head; This embodiment and second embodiment are similar; Its difference is: said external mold 20 is split up into external mold anterior 25 and external mold rear portion 26 by integral body, and external mold anterior 25 and external mold rear portion 26 are fixed together through screw 70.External mold anterior 25 is replaceable, thereby it is anterior 25 to change external mold that die cavity 21, mouthful mould 10 vary in size according to tubing thickness, to realize the production demand of different size tubing.

In sum; The utility model high life extruder head comprises mouthful mould 10, external mold 20, internal mold 30, divides fluid 40, screw adjustments 50 and connector 60; Screw adjustments 50 moves down in the screwed hole 411 of shunting frame 40 through external screw thread, in the process that moves down, and the squeezing groove 324 of the frustum portion 51 extruding inner spindle 32 of screw adjustments 50; Force inner spindle 32 to move forward; In the process that inner spindle 32 moves forward, the gap between die cavity 21 inwalls of press section 322 on the inner spindle 32 and external mold 20 is promptly melted materials flow road 211 and is narrowed down until recovery primary clearance size, thereby can continue to use; Avoid changing extruder head, this has improved the service life of extruder head.

In addition; Be pointed out that; Because the width that melts materials flow road 211 directly has influence on the thickness of extruding pipe material; So the utility model high life extruder head utilizes screw adjustments 50 to regulate the inner spindle 32 of internal mold 30 and the distance of die cavity 21 inwalls of external mold 20, that is melts the width in materials flow road 211, can under the situation of not changing extruder head, accomplish the production of different size tubing.

The utility model also provides a kind of automation extrusion system; This automation extrusion system comprises the high life extruder head among instrument for detecting wall thickness, servomotor, wall thickness adjustment controller and the above-mentioned arbitrary embodiment, regulates but servomotor connects the screw adjustments 50 and the double thread regulating part 50 of high life extruder head.

Instrument for detecting wall thickness detects the tubing thickness of extruding in real time; And data detection signal is passed to wall thickness adjustment controller, wall thickness adjustment controller is with this data-signal and typical set value check and correction, if wall thickness becomes greatly; Then send tuningout wall signal and give servomotor; This tuningout wall signal can be the time period that offers the servomotor voltage signal, and servomotor work and regulate screw adjustments 50 in this time period makes the narrowed width of melting materials flow road 211 through screw adjustments 50; Recover normal condition until the tube wall thickness of producing, thereby realize automated production.

The utility model is not limited to the above-mentioned specific embodiment; Those skilled in the art that also can make multiple variation in view of the above; For example divide fluid also can be fixedly connected through screw, but any and the utility model are equal to or similar variation all should be encompassed in the scope of the utility model claim with core.

Claims

1. a high life extruder head comprises a mouthful mould, external mold, internal mold, branch fluid and connector, and this external mold offers die cavity; This internal mold is located in this die cavity, this minute fluid have the shunting frame and divide flow cone, said mouthful of mould, external mold, branch fluid, connector are fixedly connected sequentially; It is characterized in that: said internal mold comprises outer mandrel and inner spindle, and this outer mandrel is provided with nib, and this inner spindle has setting section, press section and the axial region that connects successively; The free end of this axial region offers squeezing groove, and this inner spindle offers the airflow hole of the squeezing groove that runs through said setting section, press section to axial region, the centre bore that said shunting is set up screwed hole and is communicated with this screwed hole; Be provided with screw adjustments in this screwed hole; This screw adjustments end is provided with frustum portion, and this screw adjustments is provided with blowhole, and this inner spindle is located in the centre bore of nib and said shunting frame of said outer mandrel; The squeezing groove of said inner spindle pushes in this frustum portion, and this blowhole is communicated with the airflow hole of this inner spindle.

2. high life extruder head as claimed in claim 1; It is characterized in that: the axial region of said inner spindle has protruded out the blocking part; The nib inwall place of said outer mandrel offers spring eye; In this spring eye spring is installed, this spring is placed on the axial region of said inner spindle, and this spring one end is resisted against on this blocking part.

3. high life extruder head as claimed in claim 1; It is characterized in that: fluid offered a spring accepting hole in said minute; This spring accepting hole is communicated with the centre bore of said minute fluid; Contain a spring in the spring accepting hole, this spring one end is connected with said inner spindle is terminal, and the spring other end is fixed with the shunting frame in the spring accepting hole.

4. high life extruder head as claimed in claim 1 is characterized in that: all offer storage tank on the nib inwall of the outer surface of the axial region of said inner spindle and outer mandrel, be provided with a sealing ring in this two storage tank.

5. high life extruder head as claimed in claim 1 is characterized in that: the outer surface of the axial region of said inner spindle offers storage tank, is provided with sealing ring in this storage tank.

6. high life extruder head as claimed in claim 1 is characterized in that: offer storage tank on the nib inwall of said outer mandrel, be provided with sealing ring in this storage tank.

7. high life extruder head as claimed in claim 1 is characterized in that: the squeezing groove inwall of said inner spindle has protruded out protuberance.

8. high life extruder head as claimed in claim 1 is characterized in that: said external mold is integrally formed with mouthful mould.

9. high life extruder head as claimed in claim 1; It is characterized in that: said external mold end is provided with connecting cylinder; The free-ended inwall of this connecting cylinder place has internal thread; A said mouthful of mould and a mouthful moulded board are installed in this connecting cylinder from inside to outside successively, and the outside wall surface of this mouthful moulded board has external screw thread to be fixedly connected with the internal thread of connecting cylinder.

10. high life extruder head as claimed in claim 9 is characterized in that: said connecting cylinder is provided with screw hole, is provided with adjustment screw in this screw hole.

11. high life extruder head as claimed in claim 1 is characterized in that: said external mold is divided into the anterior and external mold rear portion of external mold by integral body, and this external mold is anterior to be fixed together through screw with the external mold rear portion.

12. like each described high life extruder head of claim 1 to 11; It is characterized in that: said external mold is provided with the external mold fixing hole; The shunting frame of said minute fluid is provided with branch fluid fixing hole; Said connector is provided with the connector fixing hole, through screw penetrate this external mold fixing hole, divide the fluid fixing hole, the connector fixing hole with said external mold, divide fluid and connector to be fixed together.

13. high life extruder head as claimed in claim 12 is characterized in that: said screw adjustments free end is provided with micrometer.

14. automatic extrusion system; It is characterized in that: this automatic extrusion system comprises instrument for detecting wall thickness, servomotor, wall thickness adjustment controller and the described high life extruder head of claim 1 to 13 claim; This servomotor connects the screw adjustments of said high life extruder head; Said instrument for detecting wall thickness is passed to said wall thickness adjustment controller with data detection signal, and said wall thickness adjustment controller sends tuningout wall signal and gives servomotor.

15. automatic extrusion system as claimed in claim 14 is characterized in that: said tuningout wall signal is for offering said servomotor voltage time section.