CN1294948A - Production process of composite aluminium-plastic pipe and its special pipe drawing machine - Google Patents
Production process of composite aluminium-plastic pipe and its special pipe drawing machine Download PDFInfo
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- CN1294948A CN1294948A CN 99123237 CN99123237A CN1294948A CN 1294948 A CN1294948 A CN 1294948A CN 99123237 CN99123237 CN 99123237 CN 99123237 A CN99123237 A CN 99123237A CN 1294948 A CN1294948 A CN 1294948A
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Abstract
The production process of combining seamless aluminium pipe with plastic to produce composite aluminium-plastic pipe includes the steps of painting glue to outside of an inner plastic pipe, inserting an aluminium pipe, heating and drawing, painting glue to outside of the aluminium pipe and forming an outer plastic layer. The pipe drawing machine consists of a drawing unit comprising drawing plate, die seat, conical die and die sleeve, a frame and a drawing trolley.
Description
The present invention relates to a kind of production technology and equipment thereof of multiple tube, especially relate to a kind of production technology that on the inside and outside wall of seamless aluminium tubing, is compounded with vinyl tube respectively, and a kind of special-purpose pipe drawing machine in the production process.
In order to overcome the not anti-corrosion and deficiencies such as plastic tube intensity is poor, life-span weak point of steel pipe, the multiple tube and the production method thereof of various metals and plastics are studied in succession, develop.Wherein, PAP is good because of the ductility of aluminium matter, and matter is more light and soft, and processing technology is convenient than iron and steel, characteristics such as good economy performance, extremely people pay close attention to, and progressively be applied in family room or the food service industry etc., the conveyance conduit of low pressure drinking water.
The many peripheries of present PAP at plastic inner pipe sticking multiple on a circle aluminium foil, and then outside it compound last layer plastic outer tube.Though this production technology is comparatively easy,,, this PAP owes high, deficiencies such as overpressure resistant and explosion-proof poor-performing so existing pipe fitting intensity because of the actual aluminium flake of aluminum pipe wherein for the overlap joint lopping.In order to improve the deficiency of this production technology, there is the people also to adopt ultrasonic welding method that its overlap joint is connected at aluminium foil (sheet) the circle place of connecing.Though this makes aluminium foil be linked to be tubulose, the equipment investment expense of ultrasonic welding machine is bigger, and pipe fitting intensity etc. still has some deficits.
On the other hand, existing bench ties up to and is installed with a draw bar (rope) in the pipe fitting to be processed, the end intrinsic core print that spins, and to extending out, the external diameter at its end place is slightly larger than the internal diameter of pipe fitting gradually in the outer end of core print.Under the effect of draw-gear, draw bar (rope) makes core print draw the other end to pipe fitting from an end of pipe fitting, thereby realizes the suitable stretching of pipe fitting and the expansion of pipe fitting inside.Though this bench can reach the purpose of stretching pipe fitting, need segmentation to stretch but still exist, and wear draw bar or pull rope in advance in the pipe piecemeal, operation inconvenience, the core print that moves easily makes the external diameter of pipe fitting that deficiencies such as fluctuation take place.
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of technology reasonable, easy to operate, the production equipment expense is lower, the production technology of the PAP that the multiple tube product quality is higher.
Another object of the present invention provides a kind of rational in infrastructure, and cost is lower, and is easy to operate, and external diameter spares one, and the extruding composite effect is the bench of PAP preferably.
Foregoing invention purpose of the present invention mainly is achieved by following technical proposals.Wherein, the production technology of PAP can include following production stage:
A. be coated with the last layer PUR in the periphery of plastic inner pipe, and be inserted in the seamless aluminium tubing that matches,
B. aluminum pipe is heated to 280 ℃-400 ℃;
C. aluminum pipe passes the extruding drawing-die, and tube drawing stretches,
D. the aluminum pipe periphery is coated with the last layer PUR;
E. extrude compound one deck plastic outer tube, cooling forming in the aluminum pipe periphery.
Preferred version of the present invention is: described inner and outer pipe plastics are polyethylene, and the preferred values that aluminum pipe adds to temperature is 340 ℃-360 ℃, and the draw ratio 1 that tube drawing stretches: 1.01-1: 1.06 are advisable.
In order to implement the above-mentioned production technology of the present invention better, can do the improvement of some necessity to its production equipment.Especially can do following improvement specially to the bench of the PAP of one of crux equipment: device for drawing die is by the drawing-die shaping rack that is fixed in frame one end, die holder provided thereon and with it the die case of phase configuration and drawing-die thereof form, the drawing-die of being located in the die case then constitutes one by steel bushing and the hard core rod in it.
Wherein, the steel bushing after-opening place of described drawing-die be provided with the hard core rod match by body, and the front angle α of the trombone slide extrusion moulding chamber of drawing-die central authorities is 15 °-20 °, cone angle beta is 20 °-50 ° thereafter, is the circular arc smooth transition therebetween.
In addition, the trombone slide extrusion moulding chamber neck lowest calibre in the drawing-die is less than the workpiece external diameter of pipe, so that the extruding of workpiece pipe, stretching.Usually, trombone slide extrusion moulding chamber neck lowest calibre is 0.95-0.98 with the ratio of workpiece caliber: 1 is advisable.
Therefore, it is reasonable that production technology of the present invention has technology, easy to operate, the input expense of production equipment is less, can utilize the manufacturing machine of existing aluminum thin tube fully, the aluminum thin tube of employing outsourcing directly carries out compound, and has obviously improved characteristics such as multiple tube intensity and quality.By the seamless composite Al-plastic pipe that this explained hereafter goes out, fundamentally eliminated defective and the hidden danger of aluminium foil in welding or adhesion process, thereby improved the overpressure resistant and explosion-proof performance of PAP.With specification is that 1216 PAP is an example, and it is 6MPa that the minimum burst pressure of seam PAP is arranged, and the minimum burst pressure of the seamless composite Al-plastic pipe that explained hereafter of the present invention goes out can reach 11MPa.Simultaneously, the bench of the PAP that in this production technology, uses, also have rational in infrastructurely, simple, need not pipe and wear draw bar and connect or finish trombone slide by root, make it the outer tube uniformity, especially in the trombone slide process of multiple tube, the internal pipe of outer tube will produce suitable squeezing action, make it both and will combine closely, and can save more valuable equipment such as ultrasonic wave plate sheet welding machine, reducing characteristics such as equipment investment greatly, is a kind of stretching extrusion machinery of producing elongated PAP.
Fig. 1 is the schematic diagram of the stereochemical structure of a kind of plastic-aluminum combined bench of the present invention;
Fig. 2 is the structure for amplifying schematic diagram of a kind of device for drawing die among the present invention;
Fig. 3 is the structure for amplifying cutaway view to mould in a kind of device for drawing die among the present invention.
Fig. 4 is a kind of technological process of production figure of the present invention;
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is done concrete description.
Extruding machine in the production line of the present invention, hot melt coating machine, hauling machine cutting machine etc. all can adopt known machinery, wherein the bench of the PAP of one of main mechanical is then developed specially, is improved and form, the concrete structure of its a kind of embodiment can be: frame 2 adopts angle steel and channel-section steel welding to make, and be fixed on the yoke, its length is 8.4 meters, and is fixed with drawing-die shaping rack 10 at the one end.Be fixed with a steel die holder 11 in drawing-die shaping rack 10 forward, central part, it is built-in with the die case 12 of steel, and be respectively equipped with circular opening in both central authorities, wherein the slightly larger in diameter of die case 12 open circles is in the external diameter of pipe fitting to be processed, and, constitute described device for drawing die 1 thus less than die holder opening diameter of a circle.
Vinyon is by known extrusion moulding tubulation machinery, through extrude, cool off, operation such as traction, produce required plastic inner pipe, then, be coated with the C101 type PUR of one deck outsourcing equably in interior pipe periphery, be inserted in automatically in the thin-wall seamless aluminum pipe; This aluminum pipe is heated aluminum pipe to 300 ℃ through the electric heating warming device, makes PUR fusing, and aluminum pipe one end that is about to be built-in with plastic inner pipe passes the drawing-die of being located on the drawing-die shaping rack, is gripped by plyer.Aluminum pipe is under the at the uniform velocity tractive of pipe drawing dolly, and its external diameter closely is fused to one with interior pipe equably under the extruding of bore by the hard core rod 132 that contracts.Evenly be coated with the last layer PUR again outside the aluminum pipe after stretching, and directly outside it, squeeze into the layer of polyethylene plastics again, through cooling, traction, and the plastic outer tube of formation one deck desired thickness.At last, the production standard of pressing product through typewriting, scale cutting and after the assay was approved, packing dispatch from the factory (referring to accompanying drawing 1).
In addition, described plastic outer tube also can adopt different plastics to make except that adopting the homogeneous material with plastic inner pipe, and for example interior pipe adopts the polyethylene pipe of food-grade, and outer tube adopts pvc material or rubber, plastic or other material is compound makes.
Other embodiment can repeat no more referring to table 1.
Table 1: the measured value table of seamless aluminium tubing when moulding the compound stretching of pipe.
| The project sequence number | ????1 | ????2 | ?3 | ????4 | ????5 | ????6 | ????7 | ????8 | ????9 | ????10 |
| Specification | 1216 | ?2025 | ?1620 | ?2025 | ?1216 | ?1620 | ?3240 | ?5163 | ?4150 | ???2632 |
| Seamless aluminium tubing heat (℃) | 280 | ?300 | ?310 | ?320 | ?340 | ?360 | ?380 | ?290 | ?400 | ????400 |
| Size (mm) before aluminum pipe stretches | 14.8 | ?24.5 | ?19.8 | ?24.5 | ?14.8 | ?19.8 | ?38.4 | ?58.8 | ?48.4 | ????31 |
| Size (mm) after aluminum pipe stretches | 14.2 | ?23.4 | ?18.8 | ?23.4 | ?14.8 | ?18.8 | ?37.4 | ?58.7 | ?47.3 | ????30 |
| Tensile force (N) | 1092 | ?900 | ?1000 | ?950 | ?1200 | ?1100 | ?1050 | ?980 | ?1150 | ????970 |
| Stretch ratio | 1∶1.05 | ?1∶1.03 | ?1∶1.04 | ?1∶1.04 | ?1∶1.06 | ?1∶1.03 | ?1∶1.02 | ?1∶1.01 | ?1∶1.02 | ?1∶1.03 |
| Draw speed (m/s) | 0.273 | ?0.250 | ?0.262 | ?0.270 | ?0.265 | ?0.258 | ?0.254 | ?0.251 | ?0.260 | ?0.253 |
Claims (5)
1, a kind of production technology of PAP is characterized in that it includes following production stage:
A. be coated with the last layer PUR in the periphery of plastic inner pipe, and be inserted in the seamless aluminium tubing that matches;
B. aluminum pipe is heated to 280 ℃-400 ℃;
C. aluminum pipe passes the extruding drawing-die, and tube drawing stretches;
D. the aluminum pipe periphery is coated with the last layer PUR;
E. extrude compound one deck plastic outer tube, cooling forming in the aluminum pipe periphery.
2, the production technology of PAP as claimed in claim 1 is characterized in that described inner and outer pipes plastics are polyethylene, and the preferred values that aluminum pipe adds to temperature is 340 ℃-360 ℃, and the draw ratio 1 that tube drawing stretches: 1.01-1: 1.06 are advisable.
3, a kind of bench of plastic-aluminum combined machine, system is made up of the device for drawing die of being located at frame one end and pipe drawing dolly placed on it, and pipe drawing dolly is driven through decelerator by motor, it is characterized in that described device for drawing die (1) is by the drawing-die setting frame (10) that is fixed in frame (2) one ends, die holder provided thereon (11) and die case of phase configuration (12) and drawing-die composition thereof with it; The drawing-die of being located in the die case (12) (13) then constitutes one by steel bushing (131) and its interior hard core rod (132).
4, the bench of PAP as claimed in claim 3, steel bushing (131) the after-opening place that it is characterized in that described drawing-die (13) be provided with the hard core rod match by body (1311), and the front angle α of the trombone slide extrusion moulding chamber (14) of drawing-die (13) central authorities is 15 °-20 °, thereafter cone angle beta is 20 °-50 °, is the circular arc smooth transition therebetween.
5, as the bench of claim 3 or 4 described PAPs, it is characterized in that the ratio of trombone slide extrusion moulding chamber (14) neck lowest calibre and workpiece caliber in the described drawing-die (13) is 0.95-0.98: 1 is advisable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991232372A CN1146482C (en) | 1999-11-06 | 1999-11-06 | Production process of composite aluminium-plastic pipe and its special pipe drawing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991232372A CN1146482C (en) | 1999-11-06 | 1999-11-06 | Production process of composite aluminium-plastic pipe and its special pipe drawing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1294948A true CN1294948A (en) | 2001-05-16 |
| CN1146482C CN1146482C (en) | 2004-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991232372A Expired - Fee Related CN1146482C (en) | 1999-11-06 | 1999-11-06 | Production process of composite aluminium-plastic pipe and its special pipe drawing machine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608720B (en) * | 2008-06-19 | 2012-11-14 | 上海爱康新型建材有限公司 | PP-R stabi composite pipe and split handpiece structure for manufacturing same |
| CN103075581A (en) * | 2013-01-29 | 2013-05-01 | 四川辉利达塑胶科技有限公司 | Three-layer pipe and manufacture method thereof |
| CN104100779A (en) * | 2013-04-07 | 2014-10-15 | 杨蒙 | Hole mesh steel belt plastic composite pipe with five-layered composite structure and manufacturing method thereof |
| CN104455789A (en) * | 2014-12-19 | 2015-03-25 | 常熟市精诚铝业有限公司 | Light aluminum alloy pipe |
| CN105372775A (en) * | 2014-05-26 | 2016-03-02 | 龚利芬 | Manufacturing method of air-blowing pipeline |
| CN107013759A (en) * | 2017-06-02 | 2017-08-04 | 马导利 | Petroleum pipeline anticorrosion equipment |
| CN109049744A (en) * | 2018-08-13 | 2018-12-21 | 湖南振辉管业有限公司 | Bench |
-
1999
- 1999-11-06 CN CNB991232372A patent/CN1146482C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608720B (en) * | 2008-06-19 | 2012-11-14 | 上海爱康新型建材有限公司 | PP-R stabi composite pipe and split handpiece structure for manufacturing same |
| CN103075581A (en) * | 2013-01-29 | 2013-05-01 | 四川辉利达塑胶科技有限公司 | Three-layer pipe and manufacture method thereof |
| CN104100779A (en) * | 2013-04-07 | 2014-10-15 | 杨蒙 | Hole mesh steel belt plastic composite pipe with five-layered composite structure and manufacturing method thereof |
| CN105372775A (en) * | 2014-05-26 | 2016-03-02 | 龚利芬 | Manufacturing method of air-blowing pipeline |
| CN105398015A (en) * | 2014-05-26 | 2016-03-16 | 龚利芬 | Method for manufacturing blowing pipeline |
| CN105479711A (en) * | 2014-05-26 | 2016-04-13 | 龚利芬 | Method for manufacturing gas-blowing pipeline for cables |
| CN105398015B (en) * | 2014-05-26 | 2017-06-06 | 郑文斌 | A kind of method for manufacturing air-blowing pipeline |
| CN104455789A (en) * | 2014-12-19 | 2015-03-25 | 常熟市精诚铝业有限公司 | Light aluminum alloy pipe |
| CN107013759A (en) * | 2017-06-02 | 2017-08-04 | 马导利 | Petroleum pipeline anticorrosion equipment |
| CN109049744A (en) * | 2018-08-13 | 2018-12-21 | 湖南振辉管业有限公司 | Bench |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1146482C (en) | 2004-04-21 |
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