CN2426408Y - Rotary extrusion handpiece for plastics tubing - Google Patents
Rotary extrusion handpiece for plastics tubing Download PDFInfo
- Publication number
- CN2426408Y CN2426408Y CN00238125U CN00238125U CN2426408Y CN 2426408 Y CN2426408 Y CN 2426408Y CN 00238125 U CN00238125 U CN 00238125U CN 00238125 U CN00238125 U CN 00238125U CN 2426408 Y CN2426408 Y CN 2426408Y
- Authority
- CN
- China
- Prior art keywords
- mandrel
- endoporus
- plastic pipe
- handpiece body
- tubing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a rotary extrusion handpiece for plastic tubing, which is mainly composed of a driving device, a core shaft, a core rod, a handpiece body, a split-flow column and other relative components. The driving device drives the core shaft and the core rod by a driving gear, and fusing plastic material stream of a fused mass flow passage which is positioned on the inner side of the core shaft forms a circumferential flow. The fusing plastic material stream flows to a clearance between the core rod and a mouth mould from a split-flow hole and a screw groove of the core shaft. The material stream forms a radial velocity gradient, and macromolecular chains move along the circumferential direction in the velocity field. And then the circumferential strength of the tubing is enhanced, the wall thickness of the tubing is lowered, and the cost of the tubing is reduced. The utility model can be used for the fabrication of various plastic high-intensity tubing.
Description
The utility model relates to a kind of macromolecular material plastic pipe processing equipment, and especially a kind of plastic pipe rotary extruding head mainly is applicable to the manufacturing of various plastic pipes.
With the plastic pipe that common extrusion method is produced, owing to extrude under the elongational flow state, strand is orientated vertically, makes the tubing axial strength be higher than circumferential strength, and this intensity anisotropy is very unreasonable for the tubing of discharge pressure fluid.Tubing for the discharge pressure fluid is following in working order, circumferential stress is the twice of axial stress, so to plain shaft to reinforced pipe, the circumferential of stress maximum just in time is the most weak direction of tubing intensity, the axial high strength of tubing, the compressive resistance that high-modulus can not make pipe improve, and cause the significant wastage of material property.In addition, because the existence of plug support exists weld mark vertically in the tube wall, the bearing capacity of tubing is further reduced in the common extruder head.
At the shortcoming that exists in the common extrusion method production, Britain Bevis etc. utilize and shear control orientation extruding technology, improved the circumferential strength of glass fibre enhancing PP pipe, obtained good enhancing effect, but extruding self-reinforcing for pure PP, this technology do not have effect (Plast.Rubb.Comp.Proc.Appl.Vol.16, No.2,1991).The Zachariades of the U.S. utilize its self-reinforcing mouth mould to PE self-reinforcing study, only obtained the conclusion of part strand circumferential orientation, the tubing circumferential strength does not obviously improve (Advance in PolymerTechnology, Vol.7, No.4,1987).BP (UK patent 946,371) directly drives the plug rotation by screw rod, causes the part macromolecular chain to shear orientation, makes the circumferential strength of tubing that raising be arranged slightly.
The plastic spiral pipe material extruder head of above-mentioned report, because structural limitations, mainly also have following problem: (1) head melt flow channel is long, plastic melt heated time lengthening causes the strand chain rupture easily, makes goods physical property deterioration; (2) drum diameter is excessive, is difficult to be fit to practical application; (3) structure is too complicated, and mechanical device, transmission device and electric power system exist all undesirable elements to influence handling safety in operating process.
The purpose of this utility model provides a kind of plastic pipe rotary extruding head, rotation by mandrel and plug in the tubing extrusion causes strand along circumferential orientation, and elimination weld mark, make the even tube wall of tubing, it is constant that the extrusion discharging speed keeps, thereby improve the circumferential strength of plastic pipe.
The purpose of this utility model is to realize like this, for reaching the technical scheme that above-mentioned purpose adopts be: the rotary extruder head of a kind of plastic pipe, its structure mainly comprises handpiece body, connector, mouthful mould and transmission device, connector is fixed in the rear portion of handpiece body, the mouth mould places the front portion of handpiece body, it is characterized in that it also comprises: a mandrel and that can make the plastic pipe outer wall shear orientation can make the plastic pipe inwall shear the plug of orientation, mandrel leading section and plug rearward end affixed and be positioned on the same axis; One can make the centration axis of melt conducting and divide fluidization tower, centration axis and branch fluidization tower and mandrel are same axis, centration axis is plugged in the endoporus of connector, divide fluidization tower to be positioned at the front portion of centration axis, its rear portion cylindrical outer surface has the gap with the mandrel bore area and constitutes the melt-flow circulation passage and communicate with the endoporus of centering spindle, radially have several equally distributed tap holes at the terminal mandrel endoporus place corresponding of this melt-flow circulation passage and communicate, divide the preceding columnar portion of fluidization tower to be fixed in the ladder endoporus of mandrel with it to excircle with it; One is fixed in the handpiece body leading section can be with the solid gland at anterior endoporus of handpiece body and step end face thereof of mouth mold pressing, and this moment fixing mouth mould and rotatable plug between have the gap and constitute materials flow and cut passage; But this transmission device mainly is made up of frequency converter, speed changer and the travelling gear of step-less adjustment mandrel and plug rotating speed, and wherein travelling gear is fixed on the circumference of mandrel; The mandrel end that is arranged in the handpiece body endoporus also is provided with the axially movable two-way push power of restriction mandrel ball bearing, its end face fits on the end face of connector endoporus step, the both sides of fixed conveyor gear are provided with the single-row radial ball bearing of supporting fixed central spindle on mandrel, be installed in the handpiece body left part endoporus external diameter socket of its brearing bore and mandrel this bearing top circle week.
The rotary head that the utility model relates to is compared with the technical scheme of common tubing head because its mandrel and plug rotate, and realizes that the outer wall of plastic pipe and inwall are the double-shear orientation, therefore has following beneficial effect:
(1) because the plastic pipe of manufacturing can reduce or eliminate axial orientation, has the advantage that improves circumferential strength, modulus, meet the instructions for use of pressure pipeline, can effectively reduce the wall thickness of tubing, reduce manufacturing cost;
(2) because the mandrel rotation effectively eliminate the weld mark in the tubing, and wall thickness is even;
(3) because the design of part of this head of formation is simple, thus easy to manufacture, easy to operate;
(4) easy control of process conditions, because the rotating speed of mandrel and plug can be regulated, it is constant that the extrusion discharging speed keeps, thereby the plastic resin variety range that is suitable for is wide, be fit to produce the pressure fluid conveyance conduit of various bores, and all can use for common tubing and composite pipe;
Below in conjunction with accompanying drawing the specific embodiment of the present invention is done to describe in further detail.
Fig. 1 is the structural representation of the utility model plastic pipe rotary extruding head;
Accompanying drawing number: 1. the anterior endoporus step end face of anterior endoporus 21. handpiece bodies of 19. minutes fluidization tower nose circles of 11. mouthfuls of moulds of connector 2. centering spindles 3. double-direction thrust ball bearings, 4. handpiece bodies, 5. travelling gears, 8. minutes fluidization tower 9. plugs, 10. glands of 6. single-row radial ball bearings, 7. mandrels, 12. connector ladder endoporus 13. connector endoporus, 14. connector bearing position 15. handpiece body left part endoporus, 16. mandrel endoporus 17. melt-flow circulation passage, 18. tap holes post section, 20. handpiece bodies 22. material streams are cut passage 23. helical grooves 24. helical groove end openings
With reference to Fig. 1, the structure of the utility model plastic pipe rotary extruding head mainly comprises: handpiece body 4, mandrel 7, connector 1, branch fluidization tower 8, mouthful mould 11, plug 9, centering spindle 2, double-direction thrust ball bearing 3, single-row radial ball bearing 6, travelling gear 5 and gland 10, and among the figure unillustrated transmission device (frequency converter and speed changer) except that frequency converter and speed changer, more than the combination of all parts all on same axis 101.
Handpiece body 4 is affixed with connector 1, present embodiment is to connect with screw, centering spindle 2 is plugged in the ladder endoporus 12 and endoporus 13 of connector 1, mandrel 7 can make the plastic pipe outer wall shear orientation, plug 9 can make the plastic pipe inwall shear orientation, the rearward end of the leading section of mandrel 7 and plug 9 is fixed together with screw thread, and is positioned on the same axis 101.The end that is arranged in the mandrel 7 of handpiece body endoporus is provided with the axially movable two-direction thrust bearing 3 of restriction mandrel, its end face fits on the end face of hole, bearing position 14 steps of connector 1, the both sides of fixed conveyor gear 5 are provided with the single-row radial ball bearing 6 of supporting fixed central spindle 7 on mandrel 7, these bearing 6 excircles are installed in the left part endoporus 15 of handpiece body 4, the bearing position cylindrical socket of its endoporus and mandrel 7.Like this, the transmission device of forming by frequency converter, speed changer and travelling gear 5, just can drive mandrel 7 and plug 9 rotations by the travelling gear 5 that is fixed on mandrel 7 cylindricals, owing to be provided with frequency converter and speed changer, just can realize the stepless speed regulation of mandrel 7 and plug 9 rotations, its speed adjustable range is 0-50 rev/min.
Endoporus 16 surface of mandrel 7 has the gap with the rear portion columnar portion of branch fluidization tower 8 and constitutes melt-flow circulation passage 17 and communicate with the endoporus of centering spindle 2, the tap hole 18 that radially has four even branches at the endoporus place of the end of this melt-flow circulation passage 17 mandrel 7 corresponding with it to the excircle communicates with it, divide the front end columnar portion 19 of fluidization tower 8 to be fixed in the ladder endoporus of mandrel 7, the rear portion of branch fluidization tower is met the melt material flow end and is coniform, so that materials flow is along logical.In addition, also be provided with a gland 10, be screwed in the leading section of handpiece body 4, mouth mould 11 can be pressed solidly on the anterior endoporus 20 and step end face 21 thereof of handpiece body 4, have the gap between mouth mould 11 that this moment is fixing and the rotatable plug 9 and constitute materials flow and cut passage 22.Simultaneously, outer surface at mandrel 7 also is provided with the helical groove 23 that five equilibrium is arranged, tap hole 18 uniform on its quantity and origin or beginning and mandrel 7 excircles is corresponding, its end openings 24 is in the gap location of mouth mould 11 with mandrel 7 end faces handing-over line, its rotary orientation is identical with the direction of rotation of mandrel 7, like this, this rotary extruder head is made the melt-flow circulation passage that mandrel 2 to mouth mould 11 has just formed a perforation by oneself, and realizes the inside and outside wall double-shear orientation of plastic pipe.The inner surface of all handpiece bodies that contacts with melt material flow and mouthful mould and branch fluidization tower, the outer surface of mandrel and plug are all through cure process, to improve wearability.Under the melt pressure effect, melt flows forward through melt-flow circulation passage 17, and in flow process, the melt outer surface is subjected to the shear action of the inner surface of mandrel 7, makes melt form the radial velocity gradient, and macromolecular chain is orientated.Melt is in tap hole 18 flows to the helicla flute of mandrel 7 outer surfaces 23, and this moment, the flow direction of melt be circumferentially, and melt is mobile forward then, is cut passage 22 through materials flow, the shearing of the plug 9 that is rotated, and melt forms another velocity gradient from inside to outside.Spiral fluted has and is beneficial to strand along circumferential orientation.Thereby improved the circumferential strength of plastic pipe, reduced the wall thickness of tubing, reduced the tubing cost.
The utility model is owing to utilize frequency converter electrodeless variable-speed device can arbitrarily adjust the head rotary speed, thereby reaches the control to preparation of pipes process condition, and is applied widely.
Claims (6)
1. plastic pipe rotary extruding head, its structure mainly comprises handpiece body, connector mouth mould and transmission device, and connector is fixed in the rear portion of handpiece body, and mouthful mould places the front portion of handpiece body, it is characterized in that it also comprises:
One mandrel and that can make the plastic pipe outer wall shear orientation can make the plastic pipe inwall shear the plug of orientation, mandrel leading section and plug rearward end affixed and be positioned on the same axis;
One can make the centration axis of melt conducting and divide fluidization tower, centration axis and branch fluidization tower and mandrel are same axis, centration axis is plugged in the endoporus of connector, divide fluidization tower to be positioned at the front portion of centration axis, its rear portion cylindrical outer surface has the gap with the mandrel bore area and constitutes the melt-flow circulation passage and communicate with the endoporus of centering spindle, radially have several equally distributed tap holes at the terminal mandrel endoporus place corresponding of this melt-flow circulation passage and communicate, divide the preceding columnar portion of fluidization tower to be fixed in the ladder endoporus of mandrel with it to excircle with it;
One is fixed in the handpiece body leading section can be with the solid gland at anterior endoporus of handpiece body and step end face thereof of mouth mold pressing, and this moment fixing mouth mould and rotatable plug between have the gap and constitute materials flow and cut passage;
But this transmission device mainly is made up of frequency converter, speed changer and the travelling gear of step-less adjustment mandrel and plug rotating speed, and wherein travelling gear is fixed on the circumference of mandrel;
The mandrel end that is arranged in the handpiece body endoporus also is provided with the axially movable two-way push power of restriction mandrel ball bearing, its end face fits on the end face of connector endoporus step, the both sides of fixed conveyor gear are provided with the single-row radial ball bearing of supporting fixed central spindle on mandrel, be installed in the handpiece body left part endoporus external diameter socket of its brearing bore and mandrel this bearing top circle week.
2. plastic pipe rotary extruding head according to claim 1, it is characterized in that: described mandrel outer surface is provided with the helical groove that five equilibrium is arranged, tap hole uniform on its quantity and origin or beginning and the mandrel excircle is corresponding, its end openings is in the gap location of mouth mould and core shaft end's hand-deliver wiring, and its rotary orientation is identical with the mandrel direction of rotation.
3. plastic pipe rotary extruding head according to claim 1 and 2 is characterized in that: the helical groove portion of described mandrel outer surface reduces gradually and is coniform from origin or beginning to terminal external diameter, and the gap of formation and handpiece body endoporus.
4. plastic pipe rotary extruding head according to claim 1 is characterized in that: the rotating speed of described mandrel and plug is stepless speed regulation, and its speed adjustable range is 0-50 rev/min.
5. plastic pipe rotary extruding head according to claim 1 is characterized in that: the rear portion of described minute fluidization tower is met the melt material flow end and is coniform.
6. plastic pipe rotary extruding head according to claim 1 is characterized in that: the inner surface of all handpiece bodies that contacts with melt material flow and mouthful mould, and divide fluidization tower, the outer surface of mandrel and plug is all through cure process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00238125U CN2426408Y (en) | 2000-06-30 | 2000-06-30 | Rotary extrusion handpiece for plastics tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00238125U CN2426408Y (en) | 2000-06-30 | 2000-06-30 | Rotary extrusion handpiece for plastics tubing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2426408Y true CN2426408Y (en) | 2001-04-11 |
Family
ID=33599241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00238125U Expired - Fee Related CN2426408Y (en) | 2000-06-30 | 2000-06-30 | Rotary extrusion handpiece for plastics tubing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2426408Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380942A (en) * | 2011-08-17 | 2012-03-21 | 中国科学院宁波材料技术与工程研究所 | Method for preparing high-heat-resistance polyester |
| CN105082492A (en) * | 2015-08-11 | 2015-11-25 | 浙江伟星新型建材股份有限公司 | Inner spiral extrusion device and inner spiral silencing pipe production device and production method |
| CN106976218A (en) * | 2017-04-18 | 2017-07-25 | 华南理工大学 | The minor caliber pipe extruding forming method and device of a kind of weldless trace |
| CN109228238A (en) * | 2018-08-15 | 2019-01-18 | 广东联塑科技实业有限公司 | A kind of double orientation plastic pipe extruder head |
| CN114750391A (en) * | 2022-04-30 | 2022-07-15 | 公元管道(湖南)有限公司 | PVC pipe extrusion die capable of eliminating melt stress |
-
2000
- 2000-06-30 CN CN00238125U patent/CN2426408Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380942A (en) * | 2011-08-17 | 2012-03-21 | 中国科学院宁波材料技术与工程研究所 | Method for preparing high-heat-resistance polyester |
| CN102380942B (en) * | 2011-08-17 | 2014-07-02 | 中国科学院宁波材料技术与工程研究所 | Method for preparing high-heat-resistance polyester |
| CN105082492A (en) * | 2015-08-11 | 2015-11-25 | 浙江伟星新型建材股份有限公司 | Inner spiral extrusion device and inner spiral silencing pipe production device and production method |
| CN106976218A (en) * | 2017-04-18 | 2017-07-25 | 华南理工大学 | The minor caliber pipe extruding forming method and device of a kind of weldless trace |
| CN109228238A (en) * | 2018-08-15 | 2019-01-18 | 广东联塑科技实业有限公司 | A kind of double orientation plastic pipe extruder head |
| CN114750391A (en) * | 2022-04-30 | 2022-07-15 | 公元管道(湖南)有限公司 | PVC pipe extrusion die capable of eliminating melt stress |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |