CN1575962A - Producing teahnology for high-polymer composite pipe and its special die - Google Patents
Producing teahnology for high-polymer composite pipe and its special die Download PDFInfo
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- CN1575962A CN1575962A CN 03144049 CN03144049A CN1575962A CN 1575962 A CN1575962 A CN 1575962A CN 03144049 CN03144049 CN 03144049 CN 03144049 A CN03144049 A CN 03144049A CN 1575962 A CN1575962 A CN 1575962A
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Abstract
The production process of the composite polymer pipe includes the following steps: coating one layer of thermosol to the inner surface of inner plastic pipe and inserting matched seamless metal pipe; reducing and drawing the combination of the inner plastic pipe and outer metal pipe; heating the reduced and drawn pipe; coating the outer surface of the outer metal pipe with adhesive; compounding one layer of outer plastic pipe; and cooling to form during drawing. The special production mold includes outer mold and inside core mold, the core mold consists of inner core mold and outer core mold, and there are inner molding nozzles and outer molding nozzles set between the inner core mold and the outer mold and between the outer core mold and the outer mold separately.
Description
Technical field
The present invention relates to a kind of production technology of multi-layered composite pipe, particularly a kind ofly on the inside and outside wall of seamless metal pipe, be compounded with the production technology of the multiple tube of high molecule plastic layer respectively, and a kind of particular manufacturing craft that relates in the production process.
Background technology
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, and characteristics such as good economy performance extremely people are paid 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, because of the actual aluminium flake of aluminum pipe wherein,, this PAP owes high, the relatively poor deficiency that waits of anti-riot withstand voltage properties so existing pipe fitting intensity 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. is still not enough.
On the other hand, the tubing of existing domestic production complex form, operation such as is extruded and is generally adopted single pair of mould to realize a kind of manufacturing procedure respectively at its gluing, and is integrated on production line.The applicant had once applied for " production technology of PAP and special-purpose bench thereof " by name in 1999 with regard to the production technology of relevant multiple tube etc. patent of invention (99123237.2), it mainly is a gluing outside plastic inner pipe, after inserting aluminum pipe, heat and pass the extruding drawing-die, tube drawing stretches, difference gluing and plastic outer layer outside it are promptly made product again.But production technology is not very reasonable, the production equipment expense is higher, and operation is very convenient etc.And because processing tubing or defective such as to heat earlier, the production technology of hot-stretch is finished, and this hot-stretch is bigger to the damage of metal tube, thereby influences product quality, and it is relatively poor to result in the uniformity, and uprising rate is low
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of technology reasonable, each layer is compound rapidly under the operating mode of basically identical, and whole in conjunction with firm, not easily separated, internal stress is little, the production technology of the macromolecule multiple tube that quality is higher.
It is a kind of easy to operate that the present invention also provides simultaneously, and the production equipment cost is lower, the production technology of the macromolecule multiple tube that production efficiency is higher.
Another object of the present invention provides a kind of rational in infrastructure, and cost is lower, and is easy to operate, the production efficiency height, and the extruding composite effect is the mould of macromolecule multiple tube preferably.
Foregoing invention purpose of the present invention mainly is achieved by following technical proposals.Wherein, the production technology of macromolecule multiple tube includes following production stage:
A, be coated with the last layer PUR, and insert in the associated seamless metal pipe on the surface of plastic inner pipe;
B, with plastic inner pipe and be placed in its outer metal tube and in device for drawing die, carry out undergauge, stretching in the lump;
C, the body to undergauge, after stretching are heated;
D, again in the outer wall surface gluing of metal tube;
E, its outside compound one deck plastic outer tube layer;
F, the traction process in cooling forming.
Preferred version of the present invention is: the metal tube gluing, and in its outside compound on the technical process of plastic outer tube layer in 0.6 second to 6 seconds time, finish.Make that compound and metal tube of plastic inner pipe and metal tube and plastic outer tube are compound almost finishes the compound of each layer at one time with under the working condition such as essentially identical temperature, making it each layer merges more each other, and internal stress is less.
In order further to improve the performance of the integral body combination of multiple tube, this plastic inner pipe is by the mould field fabrication of special use, promptly described plastic inner pipe before gluing also through heating, the operation of mould shape and cooling; And described compound embryonic tube to undergauge, stretching carries out high-frequency heated, simultaneously at the metal tube surface sizing of thermal expansion, and is compounded with the plastics outer wall on its outer tube.Like this, the metal composite pipe jointing very infirm problem that can avoid adopting the interior Guan Yuqi of outsourcing to combine.
As preferably, high-frequency heated finish to being shorter than at the metal tube surface sizing and in the operation that its outsourcing is covered with plastic outer tube in time of 20 seconds described comprising.The operation of this plastic outer tube comprises the cooling of plastic outer tube.Make that compound and metal tube of plastic inner pipe and metal tube and plastic outer tube are compound almost finishes the compound of each layer at one time with under the working condition such as essentially identical temperature, making it each layer merges more each other, and internal stress is less.
As preferably, described multiple tube is cooling forming in the process of traction; And then on its outer wall, carry out coding, automatically cutting, check, packing.
As preferably, described plastic inner pipe carries out gluing when heating to 80 ℃-135 ℃; Described metal tube is a seamless aluminium tubing, and carries out gluing in its periphery heating to 130 ℃-270 ℃ occasion, forms described plastics outer wall.
For the above-mentioned production technology of better implement the present invention, can do the improvement of some necessity to its production equipment.Especially can do following improvement specially to the particular manufacturing craft of the macromolecule multiple tube of one of key equipment: described core system is by interior core and be located at its outer core mould and constitute, and the end between both and the external mold is provided with interior injection nozzle and the outer injection nozzle that is circular layout; And the interior charging aperture of being located at described core mould one end is linked up mutually with described interior injection nozzle, and the outer charging aperture of being located on the described external mold is linked up mutually with described outer injection nozzle.Usually, described in the shape of die cavity of core and core mould similar to the cross sectional shape of processed pipe, and be arranged at outside the body, described interior injection nozzle, outer injection nozzle be respectively the taper circuit be arranged in processed pipe around.
As preferably, described in the inner of injection nozzle be provided with described in the charging aperture interior transition annular groove of linking up mutually; The inner of described outer injection nozzle is provided with the outer transition annular groove of linking up mutually with described outer charging aperture; And be provided with the control circle at the front end of described external mold, outside described control circle, be provided with trim ring, and be provided with some adjusting bolts at the front end of described external mold.To improve stable, the uniformity of the injection moulding or the injecting glue material course of work.In addition, the other calandria that is provided with ring-type of interior core, the metal die after the heating (or compound tube core) can directly enter die cavity, carries out composite molding in the state of Moderate High Temperature rapidly.
Therefore, it is reasonable that the present invention has technology, particular manufacturing craft is easy to operate, the input expense of production equipment is less, and efficient is higher, the technological process compactness, simultaneously can utilize the existing resources of production fully, compound rapidly under each layer of multiple tube product within a short period of time of the being produced approximate temperature, make it the intensity height, characteristics such as internal stress is little.
Simultaneously, for the quality of the multiple tube product that makes production higher, the applicant's specialized designs produce multiple tube special use mould and to the improvement of multiple tube stretching-machine.Wherein, the particular manufacturing craft of described production multiple tube has rational in infrastructure, arrange compact, can make that compound and metal tube of plastic inner pipe and metal tube and plastic outer tube are compound almost finishes the compound of each layer at one time with under the working condition such as essentially identical temperature, making it each layer merges more each other, internal stress is less, mould takes up space little, easy to operate, one module multiple usages, regulating characteristics such as the structure of multiple tube each layer wall thickness or caliber is comparatively convenient, is a kind of shaping dies of comparatively desirable multiple tube.Described multiple tube stretching-machine has simple and reasonable for structure, easy to operate, and the total quality of the multiple tube of processing is higher, the external diameter homogeneous, squeezing effect is good, and can be according to needs of production, regulates characteristics such as the different length of processed multiple tube and bore easily.Be particularly useful for the stretching of elongated shape PAP, the forward part operation of extruding composite molding.
Description of drawings
Accompanying drawing 1 is a kind of schematic flow sheet of producing multiple tube of the present invention;
Accompanying drawing 2 is another kind of schematic flow sheets of producing multiple tube of the present invention;
Accompanying drawing 3 is the integrally-built cross-sectional schematic of the particular manufacturing craft of a kind of multi-layered composite pipe of the present invention;
Accompanying drawing 4 is frame dolly and running part structural representations of a kind of stretching-machine of the present utility model;
Accompanying drawing 5 is structural representations of a kind of drawing-die shaping rack of the present utility model;
Accompanying drawing 6 is structural representations of a kind of reducing mold of the present utility model.
The specific embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
Embodiment 1: the plant equipment of using among the present invention has extruding machine, fuse machine, automatic gas cutting machine etc. all can adopt known machinery, and wherein the bench of the macromolecule multiple tube of one of main mechanical and particular manufacturing craft are then developed specially, improved and form by the applicant.Wherein, the structure of the particular manufacturing craft of multi-layered composite pipe as shown in Figure 3, its length, width, highly be 160 * 120 * 100mm, this mould is made up of external mold 4 and the core of being located in it, wherein, core system is by interior core 2 and be located at its outer core mould 3 and constitute, and both are respectively equipped with interior injection nozzle 32 and the outer injection nozzle 42 that is circular layout with a end between the external mold 4.The shape of the interior core 2 and the die cavity of core mould 3 is similar to the cross sectional shape of processed pipe, and is arranged at outside the body, interior injection nozzle 32, outer injection nozzle 42 be respectively the taper circuit be arranged in processed pipe around.The interior charging aperture 31 of core mould 3 one ends is linked up with interior injection nozzle 32 mutually by interior transition annular groove 33, and the outer charging aperture 41 on the external mold 4 is linked up with outer injection nozzle 42 mutually through outer transition annular groove 43.The interior core 2 other calandrias 8 that are provided with ring-type, the metal die after the heating (or compound tube core) can directly enter die cavity, carries out composite molding in the state of Moderate High Temperature rapidly.The front end of external mold 4 is provided with control circle 5, is provided with outside control circle 5 and presses 6 circles, and be provided with some adjusting bolts 7 at the front end of external mold 4.Control circle 5 mainly is the external diameter of the compound pipe of control, the thickness and the deviation thereof of regulating outer wall.Concrete control form can be various, for example, can be provided with the ring-type convex body that places between trim ring 6 and the external mold 4 in the inboard of described control circle, regulates bolt 7 and be arranged at its outside; And be provided with and the suitable cavity of described core mould front end tapering in the inboard of control circle 5.The smoothness of the inner surface of control circle and directly have influence on quality such as the fineness of multiple tube external diameter and circularity with the adaptive quality of core mould front end tapering.For making the different thickness of each layer of product, the internal diameter of core mould leading section is slightly less than the internal diameter of control circle, and is slightly larger than the internal diameter of interior core.
In process of production, can adopt the crosslinked polypropylene of outsourcing to make plastic inner pipe, through cleaning pretreatment, traction enters the autosizing device, then through heating 120 ℃ of autosizings, inserts in the metal tube, under the normal temperature state, stretch automatically by automatic stretching-machine, the draw, wherein, the course of work of stretching-machine is automatically: start through buncher 15, drive decelerator 16 drive sprockets 13 drive main chain bars and rotate to clockwise direction, the dolly chain hook is joined in the main chain bar, the dolly jaw will vise metal tube automatically, simultaneously to moving clockwise, to the regular length point, trundle is run into limit switch, automatic stopping starts buncher 25 simultaneously, drives worm reduction gear 24, drive auxilliary chain, make dolly sprocket wheel 18 to motion counterclockwise, when dolly wheel is run into limit switch, repeat said process (referring to Fig. 4).The function of drawing-die shaping rack is that the metal tube that will get off from last process is inserted in the straightening fairlead 22, and enter the reducing die orifice, and vise metal tube by the dolly jaw, carry out cold drawn, reach metal tube straightening, undergauge, the glue-line on inner wall of metal tube and the macromolecular material is closely cooperated.Reducing mold 23 is made up of overcoat 26 and the firm reducing drawing-die 27 of hard alloy, constitutes one (referring to accompanying drawing 5 and Fig. 6) together with fairlead 22, the retainer plate 21 be located in it.It can change mould specification at any time according to product requirement, only needs to become corresponding specification to get final product above-mentioned each part replacement.Again through heating 240 ℃, enter particular manufacturing craft, outer wall of inner tube and inner wall of metal tube are glued to be stained with, make the comparatively tight of both structures, multiple tube is compound with the average rate of 100 millimeters of about per seconds in being somebody's turn to do, carry out high-frequency heated to about 120 ℃, high-frequency heated stage required time is 6 seconds, select for use the FA3190 binding agent of U.S.'s import to inject composite die from interior charging aperture 31, behind interior transition annular groove 33, from the interior injection nozzle 32 of ring-type, be distributed in outside the metal pipe-wall equably, and then the crosslinked polypropylene of fusing is through outer charging aperture 41 and outer transition annular groove 43, outer injection nozzle 42 by ring-type directly is coated with the outside that places described adhesive layer comparatively equably, and the compound stage required time of outer tube is 6 seconds, makes above-mentioned each layer merge (referring to accompanying drawing 1) rapidly at close substantially temperature conditions with under the same time.The metal composite pipe that makes thus after cooling off, the traction get final product.
Embodiment 2: required plant equipment is with embodiment 1, and its technical process as shown in Figure 2.Interior pipe is selected polypropylene or crosslinked polypropylene material for use, and it is carried out preheating, after heating through 4 sections, enter mould shape, form required interior pipe, again through cooling, the bench traction of the macromolecule multiple tube by one of plant equipment, ensuing production stage, process conditions etc. are referring to embodiment 1.After the described step of finishing embodiment 1, made macromolecule multiple tube is carried out coding, enter automatic gas cutting machine then and cut automatically, the staff advances the stock to this macromolecule multiple tube at last and puts this macromolecule multiple tube check, packing.
Claims (10)
1. the production technology of a macromolecule multiple tube is characterized in that it includes following production stage:
A, be coated with the last layer PUR, and insert in the associated seamless metal pipe on the surface of plastic inner pipe;
B, with plastic inner pipe and be placed in its outer metal tube and in device for drawing die, carry out undergauge, stretching in the lump;
C, the body to undergauge, after stretching are heated;
D, again in the outer wall surface gluing of metal tube;
E, its outside compound one deck plastic outer tube layer;
F, the traction process in cooling forming.
2. the production technology of macromolecule multiple tube according to claim 1 is characterized in that described metal tube gluing, and in its outside compound on the technical process of plastic outer tube layer in 0.6 second to 6 seconds time, finish.
3. the production technology of macromolecule multiple tube according to claim 1 and 2, it is characterized in that described plastic inner pipe before gluing also through heating, the operation of mould shape and cooling; And described compound embryonic tube to undergauge, stretching carries out high-frequency heated, simultaneously at the metal tube surface sizing of thermal expansion, and is compounded with the plastics outer wall on its outer tube.
4. the production technology of macromolecule multiple tube according to claim 1 and 2 is characterized in that high-frequency heatedly finishing to being shorter than at the metal tube surface sizing and in the operation that its outsourcing is covered with plastic outer tube in time of 20 seconds described comprising.
5. the production technology of macromolecule multiple tube according to claim 1 and 2 is characterized in that described multiple tube cooling forming in the process of traction; And then on its outer wall, carry out coding, automatically cutting, check, packing.
6. the production technology of macromolecule multiple tube according to claim 1 and 2 is characterized in that described plastic inner pipe carries out gluing when heating to 80 ℃-135 ℃; Described metal tube is a seamless aluminium tubing, and carries out gluing in its periphery heating to 130 ℃-270 ℃ occasion, forms described plastics outer wall.
7. the production technology of macromolecule multiple tube according to claim 3 is characterized in that described plastic inner pipe carries out gluing when heating to 80 ℃-135 ℃; Described metal tube is a seamless aluminium tubing, and carries out gluing in its periphery heating to 130 ℃-270 ℃ occasion, forms described plastics outer wall.
8. the production technology of macromolecule multiple tube according to claim 4 is characterized in that described plastic inner pipe carries out gluing when heating to 80 ℃-135 ℃; Described metal tube is a seamless aluminium tubing, and carries out gluing in its periphery heating to 130 ℃-270 ℃ occasion, forms described plastics outer wall.
9. the particular manufacturing craft of macromolecule multiple tube according to claim 1, comprise external mold and be located at its interior core, it is characterized in that described core system by interior core (2) be located at its outer core mould (3) formation, and the end between both and the external mold is provided with interior injection nozzle (32) and the outer injection nozzle (42) that is circular layout; And the interior charging aperture (31) of being located at described core mould (3) one ends is linked up mutually with described interior injection nozzle (32), and the outer charging aperture of being located on the described external mold (4) (32) is linked up mutually with described outer injection nozzle (33).
10. the particular manufacturing craft of macromolecule multiple tube according to claim 9, the inner that it is characterized in that injection nozzle in described (32) be provided with described in charging aperture (31) the interior transition annular groove (33) of linking up mutually; The inner of described outer injection nozzle (42) is provided with the outer transition annular groove (43) of linking up mutually with described outer charging aperture (41); And be provided with control circle (5) at the front end of described external mold (4), outside described control circle (5), be provided with trim ring (6), and be provided with some adjusting bolts (7) at the front end of described external mold (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03144049 CN1575962A (en) | 2003-07-22 | 2003-07-30 | Producing teahnology for high-polymer composite pipe and its special die |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03255903.8 | 2003-07-22 | ||
| CN03255903 | 2003-07-22 | ||
| CN 03144049 CN1575962A (en) | 2003-07-22 | 2003-07-30 | Producing teahnology for high-polymer composite pipe and its special die |
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| CN1575962A true CN1575962A (en) | 2005-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03144049 Pending CN1575962A (en) | 2003-07-22 | 2003-07-30 | Producing teahnology for high-polymer composite pipe and its special die |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010034239A1 (en) * | 2008-09-25 | 2010-04-01 | Byd Company Limited | Electronic device and method of forming the same |
| CN102909232A (en) * | 2012-08-30 | 2013-02-06 | 上海大俊凯电器科技有限公司 | Long U type pipe processing molding device |
| CN104358946A (en) * | 2014-11-21 | 2015-02-18 | 金寿汉 | Rigid corrugated composite pipe and manufacturing method of rigid corrugated composite pipe |
| WO2021120441A1 (en) * | 2019-12-18 | 2021-06-24 | 安徽森泰木塑集团股份有限公司 | Mold for preparing composite profile |
-
2003
- 2003-07-30 CN CN 03144049 patent/CN1575962A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010034239A1 (en) * | 2008-09-25 | 2010-04-01 | Byd Company Limited | Electronic device and method of forming the same |
| CN102909232A (en) * | 2012-08-30 | 2013-02-06 | 上海大俊凯电器科技有限公司 | Long U type pipe processing molding device |
| CN102909232B (en) * | 2012-08-30 | 2017-06-06 | 上海大俊凯电器科技股份有限公司 | U-tube machine-shaping device long |
| CN104358946A (en) * | 2014-11-21 | 2015-02-18 | 金寿汉 | Rigid corrugated composite pipe and manufacturing method of rigid corrugated composite pipe |
| WO2021120441A1 (en) * | 2019-12-18 | 2021-06-24 | 安徽森泰木塑集团股份有限公司 | Mold for preparing composite profile |
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